IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0374851
(2003-02-25)
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발명자
/ 주소 |
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출원인 / 주소 |
- Borealis Technical Limited
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인용정보 |
피인용 횟수 :
16 인용 특허 :
44 |
초록
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An electrical rotating apparatus comprises an inverter system that outputs more than three phases. The apparatus further includes a stator electrically coupled to the inverter system, and a rotor electromagnetically coupled to a magnetic field generated by the stator. A signal generator generates a
An electrical rotating apparatus comprises an inverter system that outputs more than three phases. The apparatus further includes a stator electrically coupled to the inverter system, and a rotor electromagnetically coupled to a magnetic field generated by the stator. A signal generator generates a pulse modulated drive waveform signal, that has a frequency synchronized with the rotational frequency of the rotor, and the pulse modulated drive waveform signal drives the inverter system. The pulse modulated drive waveform signal has a pulsing frequency. Additionally, the inverter system may be fed by a pulse modulated drive waveform signal that is fed through at least one signal delay device. Alternatively, the system may also be fed selected harmonic components, such as the third harmonic, up until the number of phases in the apparatus.
대표청구항
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1. An electrical rotating apparatus comprising:a) a stator comprising a plurality of slots and windings; b) an inverter system for supplying an alternating current output having more than three phases to the windings; c) a rotor electromagnetically coupled to a magnetic field generated by said windi
1. An electrical rotating apparatus comprising:a) a stator comprising a plurality of slots and windings; b) an inverter system for supplying an alternating current output having more than three phases to the windings; c) a rotor electromagnetically coupled to a magnetic field generated by said windings; and d) a signal generator generating a pulse modulated drive waveform signal having a pulsing frequency, wherein said pulse modulated drive waveform signal drives said inverter system, wherein a rotating magnetic field produced by said pulsing frequency rotates in synchrony with said rotor, and wherein said pulse modulated drive waveform signal is modulated to obtain an approximation of a desired sine wave, and wherein said pulsing frequency is synchronized with said desired sine wave. 2. The electrical rotating apparatus of claim 1, wherein said signal generator generates said pulse modulated drive waveform signal for each of said number of phases.3. The electrical rotating apparatus of claim 1, wherein said pulse modulated drive waveform signal is selected from the group consisting of: pulse width modulated signal and pulse amplitude modulated signal.4. The electrical rotating apparatus of claim 1, further comprising a switching element, wherein said switching element controls said pulsing frequency and modulates said pulse modulated drive waveform signal.5. The electrical rotating apparatus of claim 1, further comprising a feedback system.6. The electrical rotating apparatus of claim 5, wherein said feedback system adjusts voltage of said pulse modulated drive waveform signal, synchronizing said rotational magnetic field produced by said pulsing frequency with said rotating frequency of said rotor as said frequency of said rotor changes.7. The electrical rotating apparatus of claim 5, wherein said pulsing frequency is adjusted to equal said rotating frequency of said rotor times the number of poles in said rotating magnetic field produced by said pulsing frequency, divided by two.8. The electrical rotating apparatus of claim 1, wherein said stator is comprised of a plurality of slots, wherein said plurality of slots have windings in said slots.9. The electrical rotating apparatus of claim 8, wherein said plurality of slots are arranged in multiple subsets of three.10. The electrical rotating apparatus of claim 8, wherein said windings are full span concentrated windings.11. The electrical rotating apparatus of claim 1, wherein said windings are connected using a mesh connection.12. The electrical rotating apparatus of claim 1, wherein said inverter system is comprised of inverters, wherein said inverters are half bridge inverters.13. The electrical rotating apparatus of claim 1, wherein said inverter system outputs eighteen or more phases.14. The electrical rotating apparatus of claim 1, wherein said inverter system outputs thirty six or more phases.15. A method of operating the electrical rotating apparatus of claim 1 comprising:a) providing an inverter system that outputs more than three phases of alternating current; b) electromagnetically coupling a rotor to a magnetic field generated by a stator; c) generating a pulse modulated drive waveform signal with a pulsing frequency from a signal generator; and d) driving said inverter system with said pulse modulated drive waveform signal, wherein a rotational magnetic field produced by said pulsing frequency is synchronized with a rotating frequency of said rotor, and wherein said pulse modulated drive waveform signal is modulated to obtain an approximation of a desired sine wave, and wherein said pulsing frequency is synchronized said desired sine wave. 16. The electrical rotating apparatus of claim 1, wherein said apparatus is operated in a non-linear region of a saturation curve of said stator.17. The electrical rotating apparatus of claim 1, wherein said apparatus is operated at densities greater than 130,000 lines per square inch (2.02 Tesla).18. The electrical rotating apparatus of claim 1, wherein said apparatus is operated at densities greater than 150,000 lines per square inch (2.33 Tesla).19. The electrical rotating apparatus of claim 1, wherein said pulse modulated drive waveform signal drives said inverter system and said pulse modulated drive waveform signal is fed to said inverter system through at least one signal delay device.20. The electrical rotating apparatus of claim 19, wherein said pulse modulated drive waveform signal is selected from the group consisting of: a digital signal and an analog signal.21. The electrical rotating apparatus of claim 19, wherein said signal delay device is a shift register.22. The electrical rotating apparatus of claim 19, wherein said signal delay device is coupled to a clock, and said clock is further coupled to said signal generator.23. The electrical rotating apparatus of claim 22, wherein a speed of said apparatus is adjusted by changing a speed of said clock.24. The electrical rotating apparatus of claim 23, wherein said clock does not have a fixed frequency.25. An electrical rotating apparatus comprising:a) an inverter system that outputs a number of phases of alternating current, wherein said number of phases is more than three; b) a stator electrically coupled to said inverter system; c) a rotor electromagnetically coupled to a magnetic field generated by said stator; and d) a signal generator that modulates a carrier waveform having a pulsing frequency to provide a pulse-modulated drive waveform signal to said inverter system, said drive waveform signal having a fundamental frequency, wherein said pulsing frequency is in fixed phase relation to said fundamental frequency, further wherein said signal generator also generates a second drive waveform signal corresponding to a harmonic, wherein said second drive waveform signal also drives said inverter system. 26. The electrical rotating apparatus of claim 25, wherein said second drive waveform signal is an odd harmonic that is less than or equal to the number of phases.27. The electrical rotating apparatus of claim 25, further comprising a plurality of drive waveform signals that drive said inverter system, wherein the number of plurality of drive waveform signals and said first and second drive waveform signals is less than said number of phases.28. The electrical rotating apparatus of claim 25, wherein said second drive waveform signal is the third harmonic.29. The electrical rotating apparatus of claim 25, wherein said apparatus is operated in a non-linear region of a saturation curve of said stator.30. The electrical rotating apparatus of claim 25, wherein said apparatus is operated at densities greater than 130,000 lines per square inch (2.02 Tesla).31. The electrical rotating apparatus of claim 25, wherein said apparatus is operated at densities greater than 150,000 lines per square inch (2.33 Tesla).32. The electrical rotating apparatus of claim 25, wherein said pulse modulated drive waveform signal drives said inverter system and said pulse modulated drive waveform signal is fed to said inverter system through at least one signal delay device.33. The electrical rotating apparatus of claim 32, wherein said pulse modulated drive waveform signal is selected from the group consisting of: a digital signal and an analog signal.34. The electrical rotating apparatus of claim 32, wherein said signal delay device is a shift register.35. The electrical rotating apparatus of claim 32, wherein said signal delay device is coupled to a clock, and said clock is further coupled to said signal generator.36. The electrical rotating apparatus of claim 35, wherein a speed of said apparatus is adjusted by changing a speed of said clock.37. The electrical rotating apparatus of claim 36, wherein said clock does not have a fixed frequency.38. The electrical rotating apparatus of claim 25, wherein said inverter system comprises at least one module, wherein said at least one module comprises an inverter.39. The electrical rotating apparatus of claim 38, wherein said inverter system comprises at least two modules.40. The electrical rotating apparatus of claim 38, wherein the number of modules is less than or equal to the number of phases output from said inverter system.41. The electrical rotating apparatus of claim 38, wherein the number of modules equals the number of phases output from said inverter system.42. The electrical rotating apparatus of claim 38, wherein said at least one module comprises at least one controlled switch.43. The electrical rotating apparatus of claim 42, wherein said at least one controlled switch is a transistor.44. The electrical rotating apparatus of claim 38, wherein said at least one module further comprises a signal delay device.45. The electrical rotating apparatus of claim 38, wherein said at least one module comprises a controlled switch and a signal delay device.46. The electrical rotating apparatus of claim 25, whereby said windings are grouped into a plurality of three phase groups, wherein said plurality of three phase groups is equal to the number of phases divided by three.47. The electrical rotating apparatus of claim 46, wherein at least one of said plurality of three phase groups of windings is capable of being shut off wherein the rest of said plurality of three phase groups are not shut off.48. The electrical rotating apparatus of claim 25, whereby the driven windings are arranged in at least one set of an odd integer number of windings, wherein said odd integer number of windings is the largest odd integer that divides into said number of phases evenly and divides into 360 evenly.49. The electrical rotating apparatus of claim 25, wherein said second drive waveform signal is selected from the group consisting of: third harmonic and fifth harmonic.50. The electrical rotating apparatus of claim 25, wherein said stator is wound using a mesh connection.51. The electrical rotating apparatus of claim 25, wherein drive waveform signal is described by the equation A*sin(t)+Bn*sin(nt+p).52. An electrical rotating apparatus comprising:a) a stator comprising a plurality of slots and full span concentrated windings; b) an inverter system for supplying an output having more than three phases of alternating current to the windings; c) a signal generator that modulates a carrier waveform having a pulsing frequency to provide a pulse modulated drive waveform signal to said inverter system, said drive waveform signal having a fundamental frequency, wherein said pulsing frequency is in fixed phase relation to said fundamental frequency. 53. The electrical rotating apparatus of claim 52, wherein said pulsing frequency is less than said number of phases multiplied by said fundamental frequency.54. The electrical rotating apparatus of claim 52, wherein said pulsing frequency of said drive waveform signal is equal to an even multiple of said number of phases.55. The electrical rotating apparatus of claim 52, wherein said pulsing frequency of said drive waveform signal is equal to twice said number of phases multiplied by said fundamental frequency.56. The electrical rotating apparatus of claim 52, wherein said plurality of slots are arranged in multiple subsets of three.57. The electrical rotating apparatus of claim 52, wherein said windings are regular spaced windings.58. The electrical rotating apparatus of claim 52, wherein said windings are arranged in a plurality of three phase groups, wherein the windings in each three phrase group are arranged 120 electrical degrees apart.59. The electrical rotating apparatus of claim 52, wherein said windings are arranged in a plurality of six phase groups arranged 60 electrical degrees apart.60. The electrical rotating apparatus of claim 52, wherein said inverter system comprises half bridge inverters.61. The electrical rotating apparatus of claim 52, wherein said inverter system comprises full bridge inverters.62. The electrical rotating apparatus of claim 52, wherein said inverter system outputs twelve or more phases.63. The electrical rotating apparatus of claim 52, wherein said inverter system outputs eighteen or more phases.64. The electrical rotating apparatus of claim 52, wherein said drive waveform signal is a pulse width modulated signal.65. The electrical rotating apparatus of claim 64, wherein said pulse width modulated signal is regular.66. The electrical rotating apparatus of claim 64, wherein said pulse width modulated signal is irregular.67. The electrical rotating apparatus of claim 64, wherein said pulse width modulated signal is a square wave, a full square wave, or a duty cycle modulated square wave.68. The electrical rotating apparatus of claim 64, wherein said inverter system comprises half bridge inverters, and half of said windings in said stator are driven and the other half of said windings in said stator are connected to a star point.69. The electrical rotating apparatus of claim 52, wherein said pulsing frequency comprises harmonic components, wherein said harmonic components act in synchronism with said fundamental frequency.70. The electrical rotating apparatus of claim 69, wherein said harmonic components produce torques in the direction of rotation.71. An electrical rotating induction apparatus comprising:a) a stator comprising a plurality of slots occupied by full span concentrated windings; b) an inverter system for synthesizing more than three phases of alternating current; c) a signal generator for generating a drive waveform signal characterized by a fundamental frequency and a pulsing frequency; d) and means for synchronizing the pulsing frequency as a multiple of the fundamental frequency. 72. The electrical rotating apparatus of claim 71, wherein said inverter system outputs more than two phases.73. The electrical rotating apparatus of claim 71, wherein said inverter system outputs more than three phases.74. The electrical rotating apparatus of claim 71, wherein said inverter system outputs twelve or more phases.75. The electrical rotating apparatus of claim 71, wherein said inverter system outputs eighteen or more phases.76. The electrical rotating apparatus of claim 71, wherein a length of a representation of said drive waveform signal increases as the number of phases increases.77. The electrical rotating apparatus of claim 71, wherein said drive waveform signal is a digital signal.78. The electrical rotating apparatus of claim 71, wherein said drive waveform signal is an analog signal.79. The electrical rotating apparatus of claim 71, further wherein said drive waveform signal is inverted and drives one half or fewer of inverters in said inverter system.80. The electrical rotating apparatus of claim 71, wherein a speed of said apparatus is adjusted by changing a frequency of said signal generator.81. The electrical rotating apparatus of claim 71, wherein said pulsing frequency comprises harmonic components, wherein said harmonic components act in synchronism with said fundamental frequency.82. The electrical rotating apparatus of claim 71, wherein said apparatus is operated at magnetic flux densities greater than 130,000 lines per square inch (2.02 Tesla).83. The electrical rotating apparatus of claim 71, wherein said apparatus is operated at magnetic flux densities greater than 150,000 lines per square-inch (2.33 Tesla).84. The electrical rotating apparatus of claim 71, further comprising at least two signal delay devices connected in parallel.85. The electrical rotating induction apparatus of claim 71 further comprising at least one signal delay device electrically connected to said signal generator and to said inverter system, for receiving signals from said signal generator and for delaying the signals to provide time-delayed versions thereof to said inverter system.86. The electrical rotating apparatus of claim 85, wherein said signal delay device is a shift register.87. The electrical rotating apparatus of claim 85, wherein said signal delay device comprises a clock.88. The electrical rotating apparatus of claim 87, wherein a speed of said apparatus is adjusted by changing a speed of said clock.89. The electrical rotating apparatus of claim 87, wherein said clock does not have a fixed frequency.90. A method of operating an electrical rotating apparatus comprising:a) generating a drive waveform signal having a pulsing component and a fundamental component; b) synchronizing the frequency of the pulsing component to be in a fixed phase relation to the fundamental component; c) synthesizing more than three inverter phases of alternating current; d) supplying said phases to windings of a stator of the electrical rotating apparatus, wherein the windings are concentrated and arranged in a full span configuration; e) and driving a rotor by electromagnetically connecting the rotor to a magnetic field generated by the stator. 91. The method of claim 90, further comprising: operating said apparatus in a non-linear region of a saturation curve of said stator.92. The method of claim 90, further comprising: operating said apparatus at magnetic flux densities greater than 130,000 lines per square inch (2.02 Tesla).93. The method of claim 90 wherein the step of synchronizing the frequency of the pulsing component to be in fixed phase relation to the frequency of the fundamental component comprises varying the frequency of the pulsing component to be in fixed phase relation with a varying frequency of the fundamental component.94. The method of claim 90 further including the step of processing signals from the signal generator to output a plurality of time-delayed versions of the signals.
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