Title :
A self-balancing space vector switching modulator for three-level motor drives
Author_Institution :
Rockwell Autom., Mequon, WI, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
This paper describes on how to formulate a self-balancing space vector modulator for the three-level neutral point clamp topology typically used for high power induction motor drives. Besides the space vector modulation principle being used to calculate pattern times within one control update cycle, several other techniques are proposed in order to obtain a production quality modulator. These include a pivot point concept to be used for pattern selections in order to achieve minimum switching losses, techniques for neutral point voltage balancing, power device minimum on/off time guarantee, adjacent state switching, and sine triangular equivalent etc. The derived modulator was successfully implemented with a 3500 hp motor drive. Lab test results show the effectiveness of the modulator
Keywords :
DC-AC power convertors; PWM invertors; induction motor drives; modulators; power supplies to apparatus; switching circuits; 3500 hp; neutral point voltage balancing; pattern selections; pattern times; pivot point concept; production quality modulator; self-balancing space vector switching modulator; switching losses minimisation; three-level induction motor drives; three-level neutral point clamp topology; Automation; Belts; Clamps; Motor drives; Pulse width modulation inverters; Region 1; Switches; Switching loss; Topology; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-7067-8
DOI :
10.1109/PESC.2001.954311
