Single current sensor control for PWM inverter fed AC motor drives under over-modulation mode

Author

Wei, Qing ; Sun, Kai ; Ma, Hongyan ; Huang, Lipei

Author_Institution

Dept. of Electr. Eng., Tsinghua Univ., Beijing, China

fYear

2009

fDate

3-5 Nov. 2009

Firstpage

1304

Lastpage

1309

Abstract

In order to lower the cost and expand the working range of PWM inverter fed AC motor drives, the control methods under over-modulation conditions with only a DC link current sensor are investigated. A basic phase current reconstruction algorithm is developed for PWM inverters. Taking the over-modulation into account, the space vector PWM strategy and the switching state distribution for PWM inverter are analyzed in detail. In order to realize the DC link current detection under over-modulation conditions, an adjustment scheme of the switching state distribution is proposed. Based on these works, the over-modulation vector control of PWM inverter fed AC motor drive with only a DC link current sensor is implemented. Simulation and experimental results demonstrate the feasibility and effectiveness of the proposed control algorithm.

Keywords

AC motor drives; PWM invertors; electric current control; machine control; DC link current sensor; PWM inverter fed AC motor drives; inverter fed AC motor drive; over-modulation mode; over-modulation vector control; phase current reconstruction algorithm; single current sensor control; switching state distribution; AC motors; Circuits; Control systems; Current measurement; Pulse width modulation inverters; Sampling methods; Sensor systems; Space vector pulse width modulation; Torque; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, 2009. IECON '09. 35th Annual Conference of IEEE

Conference_Location

Porto

ISSN

1553-572X

Print_ISBN

978-1-4244-4648-3

Electronic_ISBN

1553-572X

Type

conf

DOI

10.1109/IECON.2009.5414648

Filename

5414648