Title :
Braking Scheme for Vector-Controlled Induction Motor Drives Equipped With Diode Rectifier Without Braking Resistor
Author :
Hinkkanen, Marko ; Luomi, Jorma
Author_Institution :
Power Electron. Lab., Helsinki Univ. of Technol., Espoo
Abstract :
This paper deals with sensorless vector control of pulsewidth-modulated inverter-fed induction motor drives equipped with a three-phase diode rectifier. An electronically controlled braking resistor across the dc link is not used. Instead, the power regenerated during braking is dissipated in the motor while a dc-link overvoltage controller limits the braking torque. Losses in the motor are increased by an optimum flux-braking controller, maximizing either the stator voltage or the stator current depending on the speed. Below the rated speed, the braking times are comparable to those achieved using a braking resistor. The proposed braking scheme is very simple and causes no additional torque ripple. Experimental results obtained using a 2.2-kW induction motor drive show that the proposed scheme works well
Keywords :
braking; induction motor drives; machine vector control; optimal control; overvoltage; rectifying circuits; stators; torque; 2.2 kW; DC-link overvoltage controller; braking resistor; braking scheme; induction motor drive; optimum flux-braking controller; pulse width modulated inverter-fed motor; sensorless vector control; stators; three-phase diode rectifier; Diodes; Induction motor drives; Machine vector control; Pulse inverters; Rectifiers; Resistors; Sensorless control; Stators; Torque control; Voltage control; DC-link capacitor; field weakening; flux braking; overvoltage;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2006.880852