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
| Original language | English |
|---|---|
| Pages (from-to) | 1257-1263 |
| Journal | IEEE Transactions on Industry Applications |
| Volume | 42 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 18 Sept 2006 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- DC-link capacitor
- field weakening
- flux braking
- overvoltage