Title :
A new dead-time compensation method on direct torque control system based on DSP
Author_Institution :
Sch. of Electr. & Electron. Inf. Eng., Huangshi Inst. of Technol., Huangshi, China
Abstract :
In direct torque control, the voltage source inverter (VSI) was controlled based on Space-vector pulse width modulation (SVPWM). The SVPWM is an excellent control strategy, but the relation between reference voltage and actual output voltage is nonlinear due to the dead time effect and the voltage drop of power devices. The distortion of voltage invokes serious problems such as current waveform distortion and deterioration of the systems. An improved method which reduces the distortion of voltage and current in induction motor direct torque control (DTC) system is presented. It compensated three-phase voltages in terms of current directions. The method can be implemented with software without any extra hardware. The experiment results verify this method has a good compensation effect.
Keywords :
PWM invertors; induction motors; machine control; torque control; voltage control; current distortion; dead-time compensation method; direct torque control system; induction motor; power devices; space-vector pulse width modulation; voltage distortion; voltage drop; voltage source inverter; Circuits; Digital signal processing; Diodes; Flywheels; Hardware; Induction motors; Pulse width modulation inverters; Space vector pulse width modulation; Torque control; Voltage control; DTC; dead time compensation; pulse width modulation;
Conference_Titel :
Industrial Electronics and Applications, 2009. ICIEA 2009. 4th IEEE Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4244-2799-4
Electronic_ISBN :
978-1-4244-2800-7
DOI :
10.1109/ICIEA.2009.5138621
