A simple, novel method for variable-hysteresis-band current control of a three phase inverter with constant switching frequency

Author

Yao, Qunying ; Holmes, D.G.

Author_Institution

Dept. of Electr. & Comput. Syst. Eng., Monash Univ., Clayton, Vic., Australia

fYear

1993

fDate

2-8 Oct 1993

Firstpage

1122

Abstract

A novel method for implementing a variable hysteresis band current controller is described which achieves constant switching frequency without requiring a precise knowledge of the motor parameters. The controller works by using feedback and feedback variables to create a variable hysteresis band envelope, and then compensating for the interaction between phase back-EMFs that occurs when the neutral of a three-phase motor is left floating. The controller has good dynamic and steady-state response, and its performance is substantially immune to variations in the inverter DC supply voltage and motor parameters. It can be readily implemented in hardware, and only requires a few additional components compared to a conventional hysteresis current controller. Analytical, hardware implementation, simulation, FFT (fast Fourier transform) analysis, and experimental results are presented

Keywords

compensation; electric current control; electric motors; feedback; invertors; switching circuits; DC supply voltage; FFT; compensation; constant switching frequency; fast Fourier transform; feedback; hardware; hysteresis band envelope; motor; neutral; performance; phase back-EMFs; response; three phase inverter; variable hysteresis band current controller; Analytical models; Current control; DC motors; Feedback; Hardware; Hysteresis motors; Inverters; Steady-state; Switching frequency; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE

Conference_Location

Toronto, Ont.

Print_ISBN

0-7803-1462-X

Type

conf

DOI

10.1109/IAS.1993.299038

Filename

299038