Systems, methods, and computer-readable media for driving polyphase motors
OwnerYufei Zhuinventor
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Abstract
Systems, methods, and computer-readable media for driving polyphase motors are provided. A system is provided that may include an inverter with more than three phases, a stator with more than three phases, and a rotor with a number of poles. The geometry, construction, magnet flux distribution, and/or reluctance distribution can be varied between rotor poles. A method is provided that may control a system by selectively activating inverter half-bridges or other suitable inverter components, and energizing stator coils with different amplitude, which may result in non-repeating stator combined magnetic flux distribution, which may electromagnetically couple and produce torque on individual rotor poles, such as based on a pre-determined efficiency map.
Claims15
A method for enabling control of a motor, wherein the motor comprises a stator and a rotor, wherein the rotor comprises a first rotor portion with a first rotor structural geometry and a second rotor portion with a second rotor structural geometry that is different than the first rotor structural geometry, and wherein the stator comprises a first group of stator phases and a second group of stator phases that is different than the first group of stator phases, the method comprising:
- defining a first rotor portion look up table that, for each one of a plurality of combinations of a particular first rotor portion motor torque and a particular first rotor portion motor speed, comprises a first Id value and a first Iq value to be applied to one of the groups of stator phases to achieve the particular first rotor portion motor torque and the particular first rotor portion motor speed when the motor is operating with an optimum characteristic;
- and
- defining a second rotor portion look up table that, for each one of the plurality of combinations of a particular second rotor portion motor torque and a particular second rotor portion motor speed, comprises a second Id value and a second Iq value to be applied to one of the groups of stator phases to achieve the particular second rotor portion motor torque and the particular second rotor portion motor speed when the motor is operating with the optimum characteristic.
Dependencies are inferred from the claim text.