Title :
Modulation Error Observation and Regulation for use in Off-line Optimal PWM Fed High Power Synchronous Motors
Author :
Rezazade, A.R. ; Sayyah, A. ; Aflaki, M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Shahid Beheshi Univ., Tehran
Abstract :
In synchronous motors, in the range of several mega watts, operated at low switching frequencies, it is advantageous to use off-line optimal PWM, to reduce the switching losses and undesired frequency harmonic components. But low transient performance of the system restricts the use of such commands. Considering the feed-forward structure of PWM modulators, it is tried in this paper to compensate the undesired modulation-error transients that may cause high overcurrents. An 80kW setup is used to simulate the experiments in laboratory. IGBT based, two-point voltage source inverter is used, and operated at low switching frequencies to simulate GTO-based inverters that are commonly used to feed motors in this power range
Keywords :
PWM invertors; feedforward; insulated gate bipolar transistors; losses; synchronous motors; thyristor convertors; 80 kW; GTO-based inverters; IGBT; PWM modulators; feed-forward structure; frequency harmonic components; high overcurrents; high power synchronous motors; modulation error observation; modulation error regulation; modulation-error transients; off-line optimal PWM; switching losses; two-point voltage source inverter; Feedforward systems; Feeds; Insulated gate bipolar transistors; Laboratories; Pulse width modulation; Pulse width modulation inverters; Switching frequency; Switching loss; Synchronous motors; Voltage;
Conference_Titel :
Industrial Electronics and Applications, 2006 1ST IEEE Conference on
Conference_Location :
Singapore
Print_ISBN :
0-7803-9513-1
Electronic_ISBN :
0-7803-9514-X
DOI :
10.1109/ICIEA.2006.257214
