Title :
V/f PWM inverter with motor parameter identification and voltage auto-boost capabilities
Author :
Gastli, Adel ; Matsui, Nobuyuki
Author_Institution :
Dept. of Electr. & Comput. Eng., Nagoya Inst. of Technol., Japan
Abstract :
A V/f control algorithm is presented that is based on constant air-gap flux control with inverter output voltage autoboost. This algorithm permits the realization of variable-voltage-variable-frequency (VVVF) control with a simple system configuration. In addition, as a result of the sine wave modulation of the inverter output voltage, there is a decrease of the torque ripple, an improvement of the efficiency, and a reduction of vibrations and noise. The algorithm permits an automatic boost of the voltage which maintains the same air-gap density. The voltage autoboost method is based on knowledge of the load characteristics and equivalent circuit parameters of the induction motor. An offline automeasurement technique for these parameters is described. The complete control system has been constructed and tested. The test results have been found satisfactory with the use of simple 8 bit microprocessors
Keywords :
equivalent circuits; induction motors; invertors; machine control; microcomputer applications; parameter estimation; power engineering computing; pulse width modulation; V/f PWM inverter; VVVF control; algorithm; constant air-gap flux control; equivalent circuit parameters; induction motor; load characteristics; microprocessors; motor parameter identification; offline automeasurement technique; variable-voltage-variable-frequency; voltage auto-boost capabilities; Air gaps; Automatic control; Circuit noise; Circuit testing; Control systems; Equivalent circuits; Inverters; Noise reduction; Torque; Voltage control;
Conference_Titel :
Industrial Electronics Society, 1990. IECON '90., 16th Annual Conference of IEEE
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-87942-600-4
DOI :
10.1109/IECON.1990.149259
