METHODS AND APPARATUS FOR GENERATING CURRENT COMMANDS FOR AN INTERIOR PERMANENT MAGNET (IPM) MOTOR

摘要

In one aspect, an apparatus includes a motor and inverter configured to provide input power to the motor and a data store comprising at least one entry including a first torque command, a first motor speed, and a first DC voltage value. The first torque command and the first motor speed and the first DC voltage value are associated with a first current output. The apparatus includes a processor configured to receive a torque input, a DC voltage input, and a motor speed input and determine an output current associated with the torque input, the DC voltage input, and the motor speed input, correct the output current to be within a voltage constraint of the motor when the DC voltage input is than a reference voltage at the motor and output the corrected output current to cause the inverter to provide the input power to the motor.

主权项

1. An apparatus comprising:
a motor; an inverter configured to provide input power to the motor; a DC power bus configured to provide input power to the inverter; a data store comprising information defining inverter currents for producing different motor torque outputs at different motor speeds and different DC power bus voltages; and a processor configured to:
receive a torque command, a DC power bus voltage measurement, and a motor speed measurement;determine, using the data store, an inverter current command based at least in part on the torque command, the DC power bus voltage measurement, and the motor speed measurement;modify the inverter current command, wherein modifying the inverter current command comprises:
identifying a slope of a first portion of a torque curve defined by the torque command between a first point corresponding to the inverter current command and a second point corresponding to a second inverter current command; andmodifying the inverter current command based on the identified slope within voltage constraints of the motor; andcontrol the inverter based at least in part on the modified inverter current command.