DIRECT TORQUE CONTROL OF AC ELECTRIC MACHINES

Authors

Wei Qiao, Lincoln, NEFollow
Zhe Zhang, Henan
Liyan Qu, Lincoln, NE

Document Type

Article

Date of this Version

2017

Citation

Patent No.: US 9,831,812 B2

Comments

Appl. No.: 15/055,289

Abstract

This disclosure features an apparatus including a motor controller to generate control signals to control an electric motor. The motor controller includes a first saturation controller to generate a first saturation controller output based on feedback signals associated with the electric motor. The motor controller further includes a duty ratio modulator coupled to the first saturation controller. The duty ratio modulator is configured to determine activation times for a set of voltage vectors based on the first saturation controller output. The motor controller is configured to generate, at each switching cycle, a control signal based on the set of voltage vectors and the activation times for the set of voltage vectors, and provide the control signal for controlling the electric motor.