초록 ▼

A novel method is proposed for controlling the torque of a PM brushless motor with sinusoidal back-emfs without current sensors by computing the required input phase voltages with measured rotor position and speed and known machine parameters. These voltages are fed to the machine at an angle comput

A novel method is proposed for controlling the torque of a PM brushless motor with sinusoidal back-emfs without current sensors by computing the required input phase voltages with measured rotor position and speed and known machine parameters. These voltages are fed to the machine at an angle computed in terms of input parameters and the phase voltage with respect to their back-emfs so that phase currents are aligned with their back-emfs to exactly mimic the performance of the current mode controller.

대표청구항 ▼

1. A voltage mode control method for providing torque from a sinusoidally excited permanent magnet automotive motor, comprising:measuring the angular position of the rotor of the motor; determining the angular speed of the rotor of the motor; establishing a torque command signal indicative of a desi

1. A voltage mode control method for providing torque from a sinusoidally excited permanent magnet automotive motor, comprising:measuring the angular position of the rotor of the motor; determining the angular speed of the rotor of the motor; establishing a torque command signal indicative of a desired motor torque; in response to the angular position of the rotor, the angular speed of the rotor and the torque command signal, calculating the load angle of the motor and generating thereby motor voltage command signals for producing the smooth motor torque that corresponds to the torque command signal; and in response to the motor voltage command signals, applying phase voltages across the motor to produce the torque.