초록 ▼

A motor that includes a stator that contains a first winding and a second winding driven by alternating currents. The rotor is arranged to rotate relative to the stator and contains a third winding and a fourth winding for generating a magnetic field with an amplitude and a phase angle relative to t

A motor that includes a stator that contains a first winding and a second winding driven by alternating currents. The rotor is arranged to rotate relative to the stator and contains a third winding and a fourth winding for generating a magnetic field with an amplitude and a phase angle relative to the alternating currents in the first and second windings of the stator. The motor includes a circuit in communication with the third and fourth windings for controlling the phase angle of the magnetic field and generating a rotating magnetic field that is in phase-lock with the alternating currents in the first and second windings of the stator. The motor also includes a control circuit and a comparator. The control circuit has an angular position feedback device for measuring the phase of the stator and the angular position and velocity of the rotor. The comparator compares the actual rotor speed and a desired rotor speed and provides a signal for varying the magnitude of the flux vector to minimize the difference.

대표청구항 ▼

1. A motor, comprising:a stator containing a first winding and a second winding driven by an alternating current; a rotor arranged to rotate relative to the stator, the rotor containing a third winding and a fourth winding, the rotor generating a magnetic field having an amplitude and a phase angle

1. A motor, comprising:a stator containing a first winding and a second winding driven by an alternating current; a rotor arranged to rotate relative to the stator, the rotor containing a third winding and a fourth winding, the rotor generating a magnetic field having an amplitude and a phase angle relative to the alternating current; a first circuit in communication with the third and fourth windings for controlling the phase angle of the generated magnetic field and generating a rotating stator magnetic field that is in phase-lock with the alternating current; a second circuit in communication with and driving the first and second windings for controlling the rotational speed of the rotating stator magnetic field; a third circuit in communication with the third and fourth windings for controlling the magnitude of the generated magnetic field; a fourth circuit for controlling the magnitude of the rotating stator magnetic field; and a generator connected to the rotor for generating power for operating the circuit. 2. The motor of claim 1, wherein the third and fourth windings are disposed at a ninety-degree phase shift relative to each other.3. The motor of claim 2, wherein the first circuit sequences a current through each of the third and fourth windings for generating the rotating stator magnetic field.4. The motor of claim 1, further comprising a feedback device in communication with the first and second windings of the stator and the third and fourth windings of the rotor for determining motor parameters.5. The motor of claim 1, wherein the first and second windings of the stator are disposed at a ninety-degree phase shift relative to each other.6. The motor of claim 1, further comprising a rectifier disposed on the rotor for rectifying currents induced in the third and fourth rotor windings by magnetic flux generated by a powered stator.7. The motor of claim 1, wherein the first circuit includes a microprocessor.8. The motor of claim 1, wherein the rotor is formed using a permanent magnetic material and a control winding.9. The motor of claim 1, wherein the first circuit further comprises means for transferring power for operating the circuit from a stationary portion of the motor to the rotor.10. A motor comprising:a stator containing a first winding and a second winding driven by an alternating current; a rotor arranged to rotate relative to the stator, the rotor containing a third winding and a fourth winding, the rotor generating a magnetic field having an amplitude and a phase angle relative to the alternating current; a circuit in communication with the third and fourth windings for controlling the phase angle of the generated magnetic field and generating a rotating magnetic field that is in phase-lock with the alternating current; and a switch in communication with at least one of the third and fourth windings of the rotor for switching off the rotor at a predetermined rotor speed; wherein the circuit further comprises means for transferring power for operating the circuit from a stationary portion of the motor to the rotor. 11. The motor of claim 10, further comprising a generator connected to the rotor for generating power for operating the circuit.12. A motor, comprising:a stator containing a first winding and a second winding driven by an alternating current; a rotor arranged to rotate relative to the stator, the rotor containing a third winding and a fourth winding, the rotor generating a magnetic field having an amplitude and a phase angle relative to the alternating current; a circuit in communication with the third and fourth windings for controlling the phase angle of the generated magnetic field and generating a rotating magnetic field that is in phase-lock with the alternating current; and a start circuit in communication with the first and second stator windings and the third and fourth rotor windings for driving the first stator winding at the first phase. 13. The motor of claim 12, wherein the start circuit includes a rectifier and a transistor bridge, the rectifier having an input portion for connecting to a source of alternating current and an output portion in communication with the transistor bridge for supplying direct current power to the transistor bridge, the transistor bridge for driving the second stator winding at a second phase by switching rectified direct current power from the rectifier into one end of the second rotor winding.14. The motor of claim 13, wherein the transistor bridge is selected from the group consisting of an H bridge and a half-bridge.15. The motor of claim 12, wherein the transistor bridge is disposed between the rectifier and one of the third and fourth rotor windings.16. The motor of claim 12, further comprising a one phase circuit connectable at an input portion to a source of first alternating current and an output portion in communication with one of the first and second stator windings.17. The motor of claim 16, wherein the one phase circuit provides functions selected from the group consisting of current limiting, thermal limiting and soft starting.18. The motor of claim 12, wherein the starter circuit further comprises a thermal switch having an input portion connectable to a source of alternating current and an output portion in communication with one of the first and second stator windings.19. The motor of claim 12, wherein the starter circuit further comprises a phase shifting capacitor connected in series with a centrifugal switch, the phase shifting capacitor and the centrifugal switch connectable between a source of alternating current and one of the third and fourth rotor windings.20. A motor, comprising:a stator containing a winding driven by an alternating current; a rotor arranged to rotate relative to the stator, the rotor containing a winding, and the rotor generating a magnetic field having an amplitude and a phase angle relative to the alternating current; a control transformer connected to the rotor, the control transformer containing a primary winding and a secondary winding, the control transformer secondary winding in communication with the rotor winding, wherein the control transformer is for transmitting control information and power to the rotor; an active control circuit in communication with the control transformer primary winding, the control circuit in communication with the rotor winding for controlling the phase angle of the generated magnetic field and for generating a rotating magnetic field that is in phase-lock with the alternating current; an angular position feedback device in communication with the control circuit for providing an instantaneous angular position of the rotor and an instantaneous angular velocity of the rotor to the control circuit; and a power generator connected to the rotor shaft for supplying power to the control circuit. 21. The motor of claim 20, further comprising a start circuit disposed between the stator winding and the rotor winding, the start circuit in communication with the control circuit.22. The motor of claim 21, further comprising a one-phase circuit in communication with the stator.23. The motor of claim 21, further comprising a rectifier for rectifying power delivered by a source of alternating current, the rectifier in communication with a drive circuit for driving the rotor winding, the drive circuit in communication with the control circuit.24. The motor of claim 21, further comprising a centrifugal switch.25. The motor of claim 20, further comprising a drive circuit disposed between the control circuit and the control transformer primary.26. The motor of claim 20, further comprising a rectifier disposed between the rotor wing and the control transformer secondary winding.27. The motor of claim 20, wherein the control transformer is a rotary transformer.28. A motor, comprising:a stator containing a winding driven by an alternating current; a rotor arranged to rotate relative to the stator, the rotor containing a winding, and the rotor generating a magnetic field having an amplitude and a phase angle relative to the alternating current; a control transformer connected to the rotor, the control transformer containing a primary winding and a secondary winding, the control transformer secondary winding in communication with the rotor winding; a control circuit in communication with the control transformer primary winding, the control circuit in communication with the rotor winding for controlling the phase angle of the generated magnetic field and for generating a rotating magnetic field that is in phase-lock with the alternating current; an angular position feedback device in communication with the control circuit for providing an instantaneous angular position of the rotor and an instantaneous angular velocity of the rotor to the control circuit; a start circuit disposed between the stator winding and the rotor winding, the start circuit in communication with the control circuit; a thermal switch in communication with the stator winding for disconnecting a source of alternating current from the stator; and a power generator connected to the rotor shaft for supplying power to the control circuit. 29. The motor of claim 28, further comprising a centrifugal switch in communication with the stator winding for disconnecting a source of alternating current from the stator winding.30. The motor of claim 29, further comprising a phase-shift capacitor connected in series with the centrifugal switch.31. A motor, comprising:a stator containing a plurality of windings driven by an alternating current; a rotor arranged to rotate relative to the stator, the rotor containing a plurality of windings, and the rotor generating a magnetic field having an amplitude and a phase angle relative to the alternating current; a plurality of control transformers connected to the rotor shaft, the plurality of control transformers each containing a primary winding and a secondary winding, the plurality of control transformers each containing a secondary winding in communication with the plurality of rotor windings, wherein the plurality of control transformers is for transmitting control information and power to the rotor; an active control circuit in communication with the plurality of control transformers primary windings, the control circuit in communication with the plurality of rotor windings for controlling the phase angle of the generated magnetic field and for generating a rotating magnetic field that is in phase-lock with the alternating current; an angular position feedback device in communication with the control circuit for providing the instantaneous angular position of the rotor and the instantaneous angular velocity of the rotor to the control circuit; and a power generator connected to the rotor shaft for supplying power to the control circuit. 32. The motor of claim 31, wherein the plurality of control transformers is a plurality of rotary transformers.33. A motor, comprising:a stator containing a first winding and a second winding driven by an alternating current; a rotor arranged to rotate relative to the stator, the rotor containing a third winding and a fourth winding, the rotor generating a magnetic field having an amplitude and a phase angle relative to the alternating current; means for controlling the phase angle of the generated magnetic field in communication with the means for transferring signals, the means for controlling in communication with the rotor winding, wherein the means for controlling is for transmitting control information and power to the rotor; active means for generating a rotating magnetic field that is in phase-lock with the alternating current in communication with the means for transferring signals, the means for controlling in communication with the rotor winding; and means for generating power connected to the rotor shaft for supplying power to the means for controlling. 34. A motor, comprising:a stator containing a winding driven by an alternating current; a rotor arranged to rotate relative to the stator, the rotor containing a winding, and the rotor generating a magnetic field having an amplitude and a phase angle relative to the alternating current; means for transferring signals from a stationary portion of the motor to the rotor connected to the rotor, the means for transferring signals containing a primary winding and a secondary winding, the means for transferring signals in communication with the rotor winding, wherein the means for transferring signals is for transmitting control information and power to the rotor; active means for controlling the phase angle of the generated magnetic field in communication with a control transformer primary winding, the means for controlling the phase angle of the generated magnetic field in communication with each of the rotor winding, the means for transferring signals and the rotor winding; means for generating a rotating magnetic field that is in phase-lock with the alternating current in communication with the means for transferring signals; and means for generating power connected to the rotor shaft for supplying power to the active means for controlling. 35. A motor, comprising:a stator containing a plurality of windings driven by an alternating current; a rotor arranged to rotate relative to the stator, the rotor containing a plurality of windings, and the rotor generating a magnetic field having an amplitude and a phase angle relative to the alternating current; a plurality of means for transferring signals from a stationary portion of the motor to the rotor connected to the rotor shaft, the plurality of means for transferring signals containing a primary winding and a secondary winding, the plurality of means for transferring signals each containing a secondary winding in communication with the plurality of rotor windings, wherein the plurality of means for transferring signals is for transmitting control information and power to the rotor; active means for controlling the phase angle of the generated magnetic field and for generating a rotating magnetic field that is in phase-lock with the alternating current, the means for controlling the phase angle in communication with each of the plurality of control transformers primary windings and the plurality of rotor windings; means for providing an instantaneous angular position of the rotor and an instantaneous angular velocity of the rotor to the means for controlling the phase angle; and means for generating power connected to the rotor shaft for supplying power to the active means for controlling. 36. A rotor, comprising:a rotor arranged to rotate relative to a stator, the stator containing a first winding driven by an alternating current, the rotor comprising: a second winding for generating a magnetic field having an amplitude and a phase angle relative to the alternating current; a circuit in communication with the stator driving alternating current and the second winding for supplying power to the second winding and for generating a rotating magnetic field; a control device disposed on the rotor for generating a rotating magnetic field; and a power generation device disposed on the rotor. 37. The rotor of claim 36, further comprising a magnetic material disposed on the rotor, wherein the magnetic material in conjunction with the second winding generates the rotating magnetic field.38. The rotor of claim 37, wherein the magnetic material is a permanent magnet.39. The rotor of claim 36, further comprising means for transferring power for operating the circuit from a stationary portion of the motor to the rotor.40. A rotor of claim 39, wherein the means for transferring the power is selected from the group consisting of brushes, wheels on a track, non-contact power transmission devices, radio waves and rotary transformers.41. The rotor of claim 36, wherein the circuit further comprises means for transferring control signals for controlling the phase angle of the generated magnetic field from a stationary portion of the motor to the rotor.42. The rotor of claim 41, wherein the means for transferring the control signals is selected from the group consisting of brushes, wheels on a track, non-contact signal transmission devices, radio waves and rotary transformers.43. The rotor of claim 36, further comprising a control device disposed on the rotor for generating a rotating magnetic field.44. A rotor of, comprising:a rotor arranged to rotate relative to a stator, the stator containing a first winding driven by an alternating current, the rotor comprising: a second winding for generating a magnetic field having an amplitude and a phase angle relative to the alternating current; a circuit in communication with the second winding for supplying power to the second winding and for generating a rotating magnetic field; and a generator connected to the rotor for generating power for operating the circuit.