Motor control system for dynamically changing motor energization current waveform profiles
First Claim
1. A method for adaptive control of a multiphase motor comprising the steps of:
- storing a plurality of motor control schemes for effecting different operating profiles corresponding, respectively, to different operational criteria;
inputting a command;
sensing a motor operational condition;
accessing one of the stored motor control schemes in accordance with one criterion of said criteria that corresponds to the input command and the sensed motor operational condition; and
generating motor control signals to provide motor energizing current from a power supply for an operating profile corresponding to the selected stored motor control scheme.
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Accused Products
Abstract
A control system is provided for a multiphase motor having a plurality of stator phase components, each stator phase component comprising a phase winding formed on a core element, and a rotor. A plurality of motor control schemes are stored in memory or calculated dynamically during motor operation. Subject to user or system selection, one of the motor control schemes is selected by a controller for implementation. The controller generates control signals that are applied to energization circuitry for supplying current to the phase windings with a particular current waveform profile in accordance with the selected motor control scheme. The controller has an input terminal for receiving a user initiated torque command signal representing a desired motor torque. Each motor control scheme provides motor driving current that corresponds to torque command signals received at the controller input terminal. In an automatic mode, the controller accesses the appropriate control scheme to meet the torque tracking requirements of the system.
30 Citations
19 Claims
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1. A method for adaptive control of a multiphase motor comprising the steps of:
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storing a plurality of motor control schemes for effecting different operating profiles corresponding, respectively, to different operational criteria; inputting a command; sensing a motor operational condition; accessing one of the stored motor control schemes in accordance with one criterion of said criteria that corresponds to the input command and the sensed motor operational condition; and generating motor control signals to provide motor energizing current from a power supply for an operating profile corresponding to the selected stored motor control scheme. - View Dependent Claims (2, 3)
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4. A method for adaptive control of a multiphase motor comprising the steps of:
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identifying a plurality of motor control schemes for effecting respective different operating profiles; inputting a variable command that represents a user torque request; sensing motor speed; selecting one of the motor control schemes in accordance with the input command and the sensed motor speed; generating motor control signals to provide motor energizing current from a power supply for an operating profile corresponding to the selected motor control scheme; and repeating the steps of sensing, selecting and generating throughout motor operation for adaptive control of the motor; wherein the stored motor control schemes comprise an efficiency motor control scheme that provides a current waveform profile for relatively optimum operating efficiency and a high torque motor control scheme that provides a current waveform profile for relative high operating torque response. - View Dependent Claims (5, 6, 7, 8, 9)
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10. A method for adaptive control of a multiphase motor comprising the steps of:
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identifying a plurality of motor control schemes for effecting respective different operating profiles; inputting a command; sensing a motor operational condition; selecting one of the motor control schemes in accordance with the input command and the sensed motor operational condition; and generating motor control signals to provide motor energizing current from a power supply for an operating profile corresponding to the selected motor control scheme; wherein the motor stator comprises a plurality of ferromagnetically autonomous electromagnets, each electromagnet having wound thereon one of the phase windings.
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11. A motor control system for a multiphase permanent magnet motor having a stator with a plurality of phase windings, said system comprising:
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energization circuitry for providing energization current to the motor stator windings from a power supply; a controller coupled to the energization circuitry, the controller having a plurality of inputs; storage means coupled to the controller, the storage means having stored therein a plurality of different motor control schemes for respectively effecting different stator current waveform profiles; and motor condition sensing means coupled to one input of the controller; wherein the controller is dynamically responsive to the motor condition sensing means to access the motor control schemes from the storage means to energize the motor with corresponding current waveform profiles in accordance with criteria associated with the sensed motor condition. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification