Four Quadrant Voltage Limiter for Rotor Flux Oriented Machine Control
AssigneeBAE Systems Controls Inc.
InventorsRobert J. VOVOS, Arthur P. LYONS
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Abstract
Methods, systems and computer readable storage devices for a four quadrant voltage limiter that limits a commanded phase voltage to within a volt second capability of an inverter by maintaining a rotor flux and folding back a torque under both motoring and regeneration torque commands. In one embodiment: (a) in a motoring operation, an upper limit for a q-axis voltage is enforced; and (b) in a regeneration operation a lower limit for the q-axis voltage is enforced.
Claims20
A processor-implemented four quadrant voltage limiter method that limits a commanded phase voltage to within a volt second capability of an inverter, the four quadrant voltage limiter method comprising:
- in a motoring operation, enforcing by the processor an upper limit for a q-axis voltage;
- and
- in a regeneration operation, enforcing by the processor a lower limit for the q-axis voltage.
A four quadrant voltage limiter system that limits a commanded phase voltage to within a volt second capability of an inverter, the four quadrant voltage limiter system comprising:
- a processor;
- and
- a memory storing computer readable instructions that, when executed by the processor, implement:
- a first enforcing unit for enforcing, in a motoring operation, an upper limit for a q-axis voltage;
- and
- a second enforcing unit for enforcing, in a regeneration operation, a lower limit for the q-axis voltage.
A computer readable storage device including a computer program for four quadrant voltage limiting that limits a commanded phase voltage to within a volt second capability of an inverter, the computer program including instructions for:
- in a motoring operation, enforcing an upper limit for a q-axis voltage;
- and
- in a regeneration operation, enforcing a lower limit for the q-axis voltage.
Dependencies are inferred from the claim text.