Method and system for controlling motor

摘要

A method for controlling a motor is provided. The method comprises obtaining electrical signals of the motor with a signal unit, the electrical signals comprising a motor torque and an angular velocity, calculating a voltage phase angle of a voltage vector with a calculating component, wherein a command torque, the motor torque, the angular velocity and a voltage amplitude of the voltage vector are inputs of the calculating component, and wherein the voltage phase angle is a variable and the voltage amplitude is a constant. The method further comprises modulating the voltage phase angle and the voltage amplitude to a switching signal for controlling an inverter; converting a direct current voltage to the voltage vector according to the switching signal, and applying the voltage vector to the motor.

主权项

1. A method for controlling a motor, the method comprising:
obtaining electrical signals of the motor with a signal unit, the electrical signals comprising a motor torque and an angular velocity; calculating a voltage phase angle of a voltage vector with a calculating component, wherein a command torque, the motor torque, the angular velocity and a voltage amplitude of the voltage vector are inputs of the calculating component, and wherein the voltage phase angle is a variable and the voltage amplitude is a constant; modulating, with a modulator, the voltage phase angle and the voltage amplitude to form a switching signal for controlling an inverter; converting, with the inverter, a direct current voltage to the voltage vector according to the switching signal; and applying the voltage vector to the motor; wherein the motor torque generated from the motor changes linearly with respect to the voltage phase angle at a certain value of the angular velocity of the motor and a certain monotonous range of the voltage phase angle.