IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0184738
(2002-06-28)
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발명자
/ 주소 |
- Codilian, Raffi
- Ferris, Timothy A.
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출원인 / 주소 |
- Western Digital Technologies, Inc.
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인용정보 |
피인용 횟수 :
55 인용 특허 :
8 |
초록
▼
Methods and devices for converting the kinetic energy of the rotating spindle motor of a disk drive of a rechargeable battery operated mobile host device into electrical energy during braking of the rotating spindle motor. The converted electrical energy is conditioned and used to charge the recharg
Methods and devices for converting the kinetic energy of the rotating spindle motor of a disk drive of a rechargeable battery operated mobile host device into electrical energy during braking of the rotating spindle motor. The converted electrical energy is conditioned and used to charge the rechargeable battery of the mobile host device.
대표청구항
▼
1. Method of operating a disk drive having a spindle motor that rotates a disk comprising:drawing electrical energy from a rechargeable battery to execute command for reading or writing to the disk while the spindle motor is rotating, the spindle motor, in operation, generating a three phase bemf; b
1. Method of operating a disk drive having a spindle motor that rotates a disk comprising:drawing electrical energy from a rechargeable battery to execute command for reading or writing to the disk while the spindle motor is rotating, the spindle motor, in operation, generating a three phase bemf; braking the rotating spindle motor; converting kinetic energy of the rotating spindle motor into electrical energy during the braking step; regulating the electrical energy by selectively rectifying the generated three phase bemf and by controlling current flowing from a first energy storing device coupled to the rectified bemf to a second energy-storing device coupled to the rechargeable battery, and charging the rechargeable battery using the regulated electrical energy. 2. The method of claim 1, further including filtering the rectified three-phase bemf.3. The method of claim 1, wherein the first energy-storing device includes an inductor.4. The method of claim 1, wherein the second energy-storing device includes a capacitor.5. The method of claim 1, wherein regulating step includes controlling a flow of current through the first energy storing device to a reference potential or to the second energy storing device through a nonlinear element between the first energy storing device and the second energy storing device.6. The method of claim 1, wherein the controlling step includes selectively controlling a magnitude of the current flowing through the first energy storing device to control a charge rate of the rechargeable battery and a rate of braking the spindle motor.7. The method of claim 1, wherein the spindle motor includes windings that are selectively and cyclically shorted and open circuited during the braking step, wherein the second energy-storing device includes a capacitor and wherein the method further includes selectively charging the capacitor coupled to the rechargeable battery using current flowing in each of the windings.8. The method of claim 1, wherein the charging step includes controlling a charging rate of the rechargeable battery.9. The method of claim 8, wherein controlling the charging rate of the rechargeable battery is carried out by controlling a rate of braking in the braking step.10. The method of claim 1, wherein the braking step includes selecting a rate of bring of the rotating spindle motor.11. The method of claim 10, wherein the rate of braking of the rotating spindle motor is carried out by controlling a rate of charging of the rechargeable battery.12. A mobile host device, comprising:a rechargeable battery; a disk drive having a spindle motor that rotates a disk, the disk drive drawing electrical energy from the rechargeable battery during operation while the spindle motor is rotating, the spindle motor, in operation, generating a three phase bemf; a regulating and charging circuit coupled to the spindle motor and to the rechargeable battery, the regulating and charging circuit being configured to convert kinetic energy of the rotating spindle motor into electrical energy during braking of the spindle motor, and to regulate the electrical energy by selectively rectifying the generated three phase bemf and by controlling current flowing from a first energy storing device coupled to the rectified bemf to a second energy storing device coupled to the rechargeable battery, the regulating and charging circuit being further configured to charge the rechargeable battery with the regulated electrical energy. 13. The device of claim 12, wherein the regulating circuit is further configured to filter the selectively rectified three-phase bemf and to control current flowing from the first energy-storing device coupled to the rectified and filtered bemf to the second energy-storing device.14. The device of claim 12, wherein the first energy-storing device included an inductor.15. The device of claim 12, wherein the second energy-storing device includes a capacitor.16. The device of claim 12, wherein the regulating circuit fixer includes:a nonlinear element between the first energy storing device and the second energy storage element, and control logic to selectively control a flow of current through the first energy-storing device to a reference potential or to the second energy-storing device. 17. The device of claim 16, wherein the nonlinear element includes a p-n junction.18. The device of claim 16, wherein the control logic is confinable to selectively control a magnitude of the current flowing through the first energy storing device to control a charge rate of the rechargeable battery and a rate of braking of the spindle motor.19. The device of claim 12, wherein the second energy-storing device includes a capacitor and wherein the spindle motor includes windings and the charging circuit is configured to selectively and cyclically short and open circuit the windings during braking and to selectively charge the capacitor coupled to the rechargeable battery using current flowing in each of the windings.20. The device of claim 12, wherein the charging circuit is configured to control a charging rate of the rechargeable battery.21. The device of claim 20, wherein the charging circuit is configured to control the charging rate of the rechargeable battery by controlling a rate of braking of the spindle motor.22. The device of claim 12, wherein the charging circuit is configured to control a rate of braking of the spindle motor.23. The device of claim 22, wherein the charging circuit is configured to control the rate of braking of the rotating spindle motor by controlling a rate of charging of the rechargeable battery.24. A disk drive configured to be powered from a rechargeable battery, comprising:a disk; a spindle motor configured to rotate the disk and to generate, in operation, a three phase bemf, and a regulating and charging circuit coupled to the spindle motor and for coupling to the rechargeable battery, the regulating and charging circuit being configured to convert kinetic energy of the rotating spindle motor into electrical energy during braking of the spindle motor, and to regulate the electrical energy by selectively rectifying the generated three phase bemf and by controlling current flowing from a first energy storing device coupled to the rectified bemf to a second energy storing device coupled to the rechargeable battery, the regulating and charging circuit being further configured to charge the rechargeable battery with the regulated electrical energy. 25. The disk drive of claim 24, wherein the regulating circuit is further configured to filter the selectively rectified three-phase bemf and to control current flowing from the first energy device coupled to the rectified and filtered bemf to the second energy-storing device.26. The disk drive of claim 24, wherein the first energy-storing device includes an inductor.27. The disk drive of claim 24, wherein the second energy-storing device includes a capacitor.28. The disk drive of claim 24, wherein the regulating circuit further includes:a nonlinear element between the first energy storing device and the second energy storage element, and control logic to selectively control a flow of current through the first energy-storing device to a reference potential or to the second energy-stoning device. 29. The disk drive of claim 28, wherein the nonlinear element includes a p-n junction.30. The disk drive of claim 28, wherein the control logic is configurable to selectively control a magnitude of the current flowing through the first energy storing device to control a charge rate of the rechargeable battery and a rate of braking of the spindle motor.31. The disk drive of claim 24, wherein the second energy-storing device includes a capacitor and wherein the spindle motor includes windings and the charging circuit is configured to selectively and cyclically short and open circuit the windings during the braking step and to selectively charge the capacitor coupled to the rechargeable battery using current flowing in each of the windings.32. The disk drive of claim 24, wherein the charging circuit is configured to control a charging rate of the rechargeable battery.33. The disk drive of claim 24, wherein the charging circuit is configured to control the charging rate of the rechargeable battery by controlling a rate of braking of the spindle motor.34. The disk drive of claim 24, wherein the charging circuit is configured to control a rate of braking of the spindle motor.35. The disk drive of claim 34, wherein the charging circuit is configured to control the rate of braking of the rotating spindle motor by controlling a rate of charging of the rechargeable battery.36. Method of operating a disk drive having a spindle motor that rotates a disk comprising:drawing electrical energy from a rechargeable battery to execute commands for reading or writing to the disk while the spindle motor is rotating; braking the rotating spindle motor by selectively and cyclically shorting and open circuiting windings of the spindle motor; converting kinetic energy of the rotating spindle motor into electrical energy during the braking step, and charging the rechargeable battery using the electrical energy by selectively charging a capacitor coupled to the reachable battery using current flowing in each of the windings. 37. The method of claim 36, further including regulating the electrical energy and using the regulated electrical energy to charge the rechargeable battery.38. The method of claim 37, wherein the spindle motor, in operation, produces a three phase bemf and wherein the converting step includes:selectively rectifying the generated three phase bemf and controlling current flowing from a first energy-storing device coupled to the rectified bemf to the capacitor coupled to the rechargeable battery. 39. The method of claim 38, further including filtering the rectified three-phase bemf.40. The method of claim 38, wherein the first energy-storing device includes an inductor.41. The method of claim 38, wherein the controlling step includes selectively controlling a magnitude of the current flowing through the first energy storing device to control a charge rat of the rechargeable battery and a rate of braking the spindle motor.42. The method of claim 37, wherein regulating step includes controlling a flow of current through the first energy storing device to a reference potential or to the capacitor through a nonlinear element between the first energy storing device and the capacitor.43. The method of claim 36, wherein the charging step includes controlling a charging rate of the rechargeable battery.44. The method of claim 43, wherein controlling the charging rate of the rechargeable battery is carried out by controlling a rate of braking in the braking step.45. The method of claim 36, wherein the braking step includes selecting a rate of braking of the rotating spindle motor.46. The method of claim 45, wherein the rate of braking of the rotating spindle motor is carried out by controlling a rate of charging of the rechargeable battery.47. A mobile host device, comprising:a rechargeable battery; a disk drive having a spindle motor that rotates a disk, the spindle motor including windings, the disk drive drawing electrical energy from the rechargeable battery during operation while the spindle motor is rotating; a charging circuit coupled to the spindle motor and to the rechargeable battery the charging circuit being configured to convert kinetic energy of the rotating spindle motor into electrical energy during braking of the spindle motor by selectively and cyclically shorting and open circuiting the windings and to selectively charge a capacitor coupled to the rechargeable battery using current flowing in each of the windings. 48. The device of claim 47, further including a regulating circuit configured to regulate the electrical energy and to charge the rechargeable battery using the regulated electrical energy.49. The device of claim 48, wherein the spindle motor, in operation, produces a three phase bemf and wherein the regulating circuit is configured to selectively rectify the generated three phase bemf and to control current flowing from a first energy storing device coupled to the rectified bemf to the capacitor.50. The device of claim 49, wherein the regulating circuit is further configured to filter the selectively rectified three-phase bemf and to control current flowing from the first energy-storing device coupled to the rectified and filtered bemf to the capacitor.51. The device of claim 49, wherein the first energy-storing device includes an inductor.52. The device of claim 49, wherein the regulating circuit further includes:a nonlinear element between the first energy storing device and the capacitor, and control logic to selectively control a flow of current through the fast energy-storing device to a reference potential or to the capacitor. 53. The device of claim 52, wherein the nonlinear element includes a in junction.54. The device of claim 52, wherein the control logic is configurable to selectively control a magnitude of the current flowing through the first energy storing device to control a charge rate of the rechargeable battery and a rate of braking of the spindle motor.55. The device of claim 47, wherein the charging circuit is configured to control a charging rate of the rechargeable battery.56. The device of claim 55, wherein the charging circuit is configured to control the charging rate of the rechargeable battery by controlling a rate of braking of the spindle motor.57. The device of claim 47, wherein the charging circuit is configured to control a rate of braking of the spindle motor.58. The device of claim 57, wherein the charging circuit is configured to control the rate of braking of the rotating spindle motor by controlling a rate of charging of the rechargeable battery.59. A disk drive configured to be powered from a rechargeable battery, comprising:a disk; a spindle motor configured to rotate the disk, the spindle motor including windings, and a charging circuit coupled to the spindle motor and for coupling to the rechargeable battery, the charging circuit being configured to convert kinetic energy of the rotating spindle motor into electrical energy during braking of the spindle motor by selectively and cyclically shorting and open circuiting the windings and to selectively charge a capacitor coupled to the rechargeable battery using current flowing in each of the windings. 60. The disk drive of claim 59, further including a regulating circuit configured to regulate the electrical energy and to charge the rechargeable battery using the regulated electrical energy.61. The disk drive of claim 60, wherein the spindle motor, in operation, produces a three phase bemf and wherein the regulating circuit is configured to selectively rectify the generated three phase bemf and to control current flowing from a first energy storing device coupled to the rectified bemf to the capacitor.62. The disk dive of claim 61, wherein the regulating circuit is further configured to filter the selectively rectified three-phase bemf and to control current flowing from the first energy device coupled to the rectified and filtered bemf to the capacitor.63. The disk drive of claim 61, wherein the first energy-storing device includes an inductor.64. The disk drive of claim 61, wherein the regulating circuit further includes:a nonlinear element between the first energy storing device and the capacitor, and control logic to selectively control a flow of current through the first energy-storing device to a reference potential or to the capacitor. 65. The disk drive of claim 64, wherein the nonlinear element includes a p-n junction.66. The disk drive of claim 64, wherein the control logic is configurable to selectively control a magnitude of the current flowing through the first energy storing device to control a charge rate of the rechargeable battery and a rate of braking of the spindle motor.67. The disk drive of claim 59, wherein the charging circuit is configured to control a charging rate of the rechargeable battery.68. The disk drive of claim 67, wherein the charging circuit is configured to control the charging rate of the rechargeable battery by controlling a rate of braking of the spindle motor.69. The disk drive of claim 65, wherein the charging circuit is configured to control a rate of braking of the spindle motor.70. The disk drive of claim 69, wherein the charging circuit is configured to control the rate of braking of the rotating spindle motor by controlling a rate of charging of the rechargeable battery.71. Method of operating a disk drive having a spindle motor that rotates a disk, comprising:drawing electrical energy from a rechargeable battery to execute commands for reading or writing to the disk while the spindle motor is rotating; braking the rotating spindle motor; converting kinetic energy of the rotating spindle motor into electrical energy during the braking step, and charging the rechargeable battery using the electrical energy and controlling a rate at which the rechargeable battery charges. 72. The method of claim 71, further including regulating the electrical energy and using the regulated electrical energy to charge the rechargeable battery.73. The method of claim 72, wherein the spindle motor, in operation, produces a three phase bemf and wherein the converting step includes:selectively rectifying the generated three phase bemf and controlling current flowing from a first energy-storing device coupled to the rectified bemf to a second energy-storing device coupled to the rechargeable battery. 74. The method of claim 73, further including filtering the rectified three-phase bemf.75. The method of claim 73, wherein the first energy-storing device includes an inductor.76. The method of claim 73, wherein the second energy-storing device includes a capacitor.77. The method of claim 73, wherein regulating step includes controlling a flow of current through the first energy storing device to a reference potential or to the second energy storing device through a nonlinear element between the first energy storing device and the second energy storing device.78. The method of claim 73, wherein the controlling step includes selectively controlling a magnitude of the current flowing through the first energy storing device to control a charge rate of the rechargeable battery and a rate of braking the spindle motor.79. The method of claim 71, wherein the spindle motor includes windings that are selectively and cyclically shorted and open circuited during the braking step and wherein the method further includes selectively charging a capacitor coupled to the rechargeable battery using current flowing in each of the windings.80. The method of claim 79, wherein controlling the rate at which the rechargeable battery charges is carried out by controlling a rate of braking in the braking step.81. The method of claim 71, wherein the braking step includes selecting a rate of braking of the rotating spindle motor.82. The method of claim 81, wherein the rate of braking of the rotating spindle motor is carried out by the controlling of the rate at which the rechargeable battery charges.83. A mobile host device, comprising:a rechargeable battery; a disk drive having a spindle motor that rotates a disk, the disk drive drawing electrical energy from the rechargeable battery during operation while the spindle motor is rotating; a charging circuit coupled to the spindle motor and to the rechargeable battery, the charging circuit being configured to convert kinetic energy of the rotating spindle motor into electrical energy during bung of the spindle motor and to charge the rechargeable battery with the electrical energy, the charging circuit being further configured to control a rate at which the rechargeable battery charges. 84. The device of claim 83, further including a regulating circuit configured to regulate the electrical energy and to charge the rechargeable battery using the regulated electrical energy.85. The device of claim 84, wherein the spindle motor, in operation, produces a three phase bemf and wherein the regulating circuit is configured to selectively rectify the generated three phase bemf and to control current flowing from a first energy storing device coupled to the rectified benefit to a second energy storing device coupled to the rechargeable battery.86. The device of claim 85, wherein the regulate circuit is further configured to filter the selectively rectified three-phase bemf and to control current flowing from the first energy-storing device coupled to the rectified and filtered bemf to the second energy-storing device.87. The device of claim 85, wherein the first energy-storing device includes an inductor.88. The device of claim 85, wherein the second energy-storing device includes a capacitor.89. The device of claim 85, wherein the regulating circuit further includes:a nonlinear element between the first energy storing device and the second energy storage element, and control logic to selectively control a flow of current through the first energy-storing device to a reference potential or to the second energy-storing device. 90. The device of claim 89, wherein the nonlinear element includes a p-n junction.91. The device of claim 89, wherein the control logic is configurable to selectively control a magnitude of the current flowing through the first energy storing device to control the rate at which the rechargeable battery charges and a rate of braking of the spindle motor.92. The device of claim 83, wherein the spindle motor includes windings and the charging circuit is configured to selectively and cyclically short and open circuit the windings during the braking step and to selectively charge a capacitor coupled to the rechargeable battery using current flowing in each of the windings.93. The device of claim 83, wherein the charging circuit is configured to control the rate at which the rechargeable battery charges by controlling a rate of braking of the spindle motor.94. The device of claim 83, wherein the charging circuit is configured to control a rate of braking of the spindle motor.95. The device of claim 94, wherein the charging circuit is configured to control the rate of braking of the rotating spindle motor by controlling the rate at which the rechargeable battery charges.96. A disk drive configured to be powered from a rechargeable bate, comprising:a disk; a spindle motor configured to rotate the disk, and a charging circuit coupled to the spindle motor and for coupling to the rechargeable battery, the charging circuit being configured to convert kinetic energy of the rotating spindle motor into electrical energy during braking of the spindle motor and to charge the rechargeable battery with the electrical energy, the charging circuit being further configured to control a rate at which the rechargeable battery charges. 97. The disk drive of claim 96, further including a regulating circuit configured to regulate the electrical energy and to charge the rechargeable battery using the regulated electrical energy.98. The disk drive of claim 97, wherein the spindle motor, in operation, produces a three phase bemf and wherein the regulating circuit is configured to selectively rectify the generated three phase bemf and to control currant flowing from a first energy storing device coupled to the rectified bemf to a second energy storing device coupled to the rechargeable battery.99. The disk drive of claim 98, wherein the regulating circuit is fitter configured to filter the selectively rectified three-phase bemf and to control current flowing from the fat energy device coupled to the rectified and filtered bemf to the second energy-storing device.100. The disk drive of claim 98, wherein the first energy-storing device includes an inductor.101. The disk drive of claim 98, wherein the second energy-storing device includes a capacitor.102. The disk drive of claim 98, wherein the regulating circuit further includes:a nonlinear element between the first energy storing device and the second energy storage element, and control logic to selectively control a flow of current through the first energy storing device to a reference potential or to the second energy-storing dice. 103. The disk drive of claim 102, wherein the nonlinear element includes a p-n junction.104. The disk drive of claim 102, wherein the control logic is configurable to selectively control a magnitude of the current flowing through the first energy storing device to control the rate at which the rechargeable battery charges and a rate of brig of the spindle motor.105. The disk drive of claim 96, wherein the spindle motor includes windings and the charging circuit is configured to selectively and cyclically short and open circuit the windings during the braking step and to selectively charge a capacitor coupled to the rechargeable battery using current flowing in each of the windings.106. The disk drive of claim 96, wherein the charging circuit is configured to control the rate at which the rechargeable battery charges by controlling a rate of braking of the spindle motor.107. The disk drive of claim 96, wherein the charging circuit is configured to control a rate of braking of the spindle motor.108. The disk drive of claim 107, wherein the charging circuit is configured to control the rate of braking of the rotating spindle motor by controlling the rate at which the rechargeable battery charges.109. Method of operating a disk drive having a spindle motor that rotates a disk, comprising:drawing electrical energy from a rechargeable battery to execute commands for reading or writing to the disk while the spindle motor is rotating; selecting a rate at which to brake the rotating spindle motor and braking the rotating spindle motor at the selected braking rate; converting kinetic energy of the rotating spindle motor into electrical energy during the braking step, and charging the rechargeable battery using the electrical energy. 110. The method of claim 109, further including regulating the electrical energy and using the regulated electrical energy to charge the rechargeable battery.111. The method of claim 110, wherein the spindle motor, in operation, produces a three phase bemf and wherein the converting step includes:selectively rectifying the generated three phase bemf and controlling current flowing from a first energy-storing device coupled to the rectified bemf to a second energy-storing device coupled to the rechargeable battery. 112. The method of clam 111, further including filtering the rectified three-phase bemf.113. The method of claim 111, wherein the first energy-storing device includes an inductor.114. The method of claim 111, wherein the second energy-storing device includes a capacitor.115. The method of claim 111, wherein regulating step includes controlling a flow of current through the first energy storing device to a reference potential or to the second energy storing device through a nonlinear element between the first energy storing device and the second energy storing device.116. The method of claim 111, wherein the controlling step includes selectively controlling a magnitude of the current flowing through the first energy storing device to control a charge rate of the rechargeable battery and the rate at which the spindle motor brakes.117. The method of claim 109, wherein the spindle motor includes windings that are selectively and cyclically shorted and open circuited during the braking step and wherein the method further includes selectively charging a capacitor coupled to the rechargeable battery using current flowing in each of the windings.118. The method of claim 117, wherein controlling the charging rate of the rechargeable battery is carried out by controlling the rate at which the spindle motor brakes in the banking step.119. The method of claim 118, wherein controlling the rate at which the spindle motor brakes is carried out by controlling a rate of charging of the rechargeable battery.120. The method of claim 109, wherein the charging step includes controlling a charging rate of the rechargeable battery.121. A mobile host device, comprising:a rechargeable battery; a disk drive having a spindle motor that rotates a disk the disk drive drawing electrical energy from the rechargeable battery during operation while the spindle motor is rotating; a charging circuit coupled to the spindle motor and to the rechargeable battery, the charging circuit being configured to convert kinetic energy of the rotating spindle motor into electrical energy during braking of the spindle motor, the charging circuit further being configured to control a rate at which the spindle motor brakes and to charge the rechargeable battery with the electrical energy. 122. The device of claim 121, further including a regulating circuit configured to regulate the electrical energy and to charge the rechargeable battery using the regulated electrical energy.123. The device of claim 122, wherein the spindle motor, in operation, produces a three phase bemf and wherein the regulating circuit is configured to selectively rectify the generated three phase bemf and to control current flowing from a first energy storing device coupled to the rectified bemf to a second energy storing device coupled to the rechargeable battery.124. The device of claim 123, wherein the regulating circuit is further configured to filter the selectively rectified three-phase bemf and to control current flowing from the first energy-storing device coupled to the rectified and filtered bemf to the second energy-storing device.125. The device of claim 123, wherein the first energy-storing device includes an inductor.126. The device of claim 123, wherein the second energy-storing device includes a capacitor.127. The device of claim 123, wherein the regulating circuit includes:a nonlinear element between the first energy storing device and the second energy storage element, and control logic to selectively control a flow of current through the first energy-storing device to a reference potential or to the second energy-storing device. 128. The device of claim 127, wherein the nonlinear element includes a p-n junction.129. The device of claim 127, wherein the control logic is configurable to selectively control a magnitude of the current flowing through the first energy storing device to control a charge rate of the rechargeable battery and a rate of braking of the spindle motor.130. The device of claim 121, wherein the spindle motor includes windings and the charging circuit is configured to selectively and cyclically short and open circuit the windings during the braking step and to selectively charge a capacitor coupled to the rechargeable battery using current flowing in each of the windings.131. The device of claim 121, wherein the charging circuit is configured to control a charging rate of the rechargeable battery.132. The device of claim 131, wherein the charging circuit is configured to control the charging rate of the rechargeable battery by controlling the rate at which the spindle motor brakes.133. The device of claim 132, wherein the charging circuit is configured to control the rate at which the spindle motor bakes by controlling a rate of charging of the rechargeable battery.134. A disk drive configured to be powered from a rechargeable battery comprising:a disk; a spindle motor configured to rotate the disk, and a charging circuit coupled to the spindle motor and for coupling to the rechargeable battery, the charging circuit being configured to convert kinetic energy of the rotating spindle motor into electrical energy dung brig of the spindle motor, the charging circuit ether being configured to control a rate at which the spindle motor brakes and to charge the rechargeable battery with the electrical energy. 135. The disk drive of claim 134, further including a regulating circuit configured to regulate the electrical energy and to charge the rechargeable battery using the regulated electrical energy.136. The disk drive of claim 135, wherein the spindle motor, in operation, produces a three phase bemf and wherein the regulating circuit is configured to selectively rectify the generated three phase bemf and to control current flowing from a first energy storing device coupled to the rectified bemf to a second energy storing device coupled to the rechargeable battery.137. The disk drive of claim 136, wherein the regulating circuit is further configured to filter the selectively rectified three-phase bemf and to control current flowing from the first energy device coupled to the rectified and filtered bemf to the second energy-storing device.138. The disk drive of claim 136, wherein the first ne-storing device includes an inductor.139. The disk drive of claim 136, wherein the second energy-storing device includes a capacitor.140. The disk drive of claim 136, wherein the regulating circuit further includes:a nonlinear element between the first energy storing device and the second energy storage element, and control logic to selectively control a flow of current through the first energy-storing device to a reference potential or to the second energy-storing device. 141. The disk drive of claim 140, wherein the nonlinear element includes a p-n junction.142. The disk drive of claim 140, wherein the control logic is configurable to selectively control a magnitude of the current flowing through the first energy storing device to control a charge rate of the rechargeable battery an the rate at which the spindle motor brakes.143. The disk drive of claim 134, wherein the spindle motor includes windings and the charging circuit is configured to selectively and cyclically short and open circuit the windings during the braking step and to selectively charge a capacitor coupled to the rechargeable battery using current flowing in each of the winding.144. The disk drive of clam 134, wherein the charging circuit is configured to control a charging rate of the rechargeable battery.145. The disk drive of claim 144, wherein the charging circuit is configured to control the charging rate of the rechargeable battery by controlling the rate at which the spindle motor brakes.
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