SENSORLESS MOTOR DRIVE VECTOR CONTROL

摘要

Disclosed examples include methods, computer readable mediums and motor drive power conversion systems for sensorless speed control of a motor driven by an inverter through an intervening filter, a transformer and a motor cable, in which sensorless vector control is used to regulate the motor speed based on a speed feedback value computed according to voltage or current values associated with the motor drive using an observer having formulas and impedance parameters of the filter, the transformer, the motor cable and the motor.

主权项

1. A power conversion system, comprising:
an inverter comprising a DC input, an AC output, and a plurality of switching devices coupled between the DC input and the AC output and operative according to inverter switching control signals to convert DC electrical power received at the DC input to provide AC electrical output power at the AC output to drive a motor through an intervening filter, a transformer and a motor cable; and a controller configured to compute a speed feedback value representing a rotational speed of the motor according to at least one voltage or current value associated with the power conversion system, and to provide the inverter switching control signals to control the inverter to regulate the rotational speed of the motor at least partially according to the inverter speed feedback value using vector control.