Title :
New advanced control methods for doubly salient permanent magnet motor
Author :
Blaabjerg, Frede ; Christensen, Leif ; Rasmussen, Peter O. ; Oestergaard, Leo ; Pedersen, Peder
Author_Institution :
Inst. of Energy Technol., Aalborg Univ., Denmark
Abstract :
High performance and high efficiency in adjustable speed drives are needed and new motor constructions are investigated and analyzed world wide. This paper deals with advanced control of a doubly salient permanent magnet (DSPM) motor. The construction of the DSPM motor is shown and a dynamical model of the motor is used for simulations. As supply to the DSPM motor, a power converter with a split capacitor is used to reduce the number of devices, and a basic control method for this converter is explained. This control method will cause an unequal voltage distribution across the capacitors because the motor is asymmetrical and a decrease in efficiency and a poorer dynamic performance are the results. To minimize the problems with the unequal load of the capacitors in the converter, a new charge control strategy is developed. The efficiency of the motor can also be improved by using a power minimizing scheme based on changing the turn-on and turn-off angles of the current. The two different strategies are implemented in an adjustable-speed drive, and it is concluded that both control strategies improve the performance of the drive
Keywords :
AC motor drives; capacitors; electric variables control; machine control; machine theory; permanent magnet motors; power convertors; simulation; variable speed drives; adjustable speed drives; asymmetrical motor; charge control strategy; control methods; doubly salient permanent magnet motor; dynamical model; efficiency decrease; power converter; power minimizing scheme; simulation; split capacitor; turn-off angle; turn-on angle; unequal voltage distribution; Bidirectional control; Capacitors; Energy consumption; Energy conversion; Magnetic analysis; Permanent magnet motors; Pulse width modulation inverters; Reluctance motors; Variable speed drives; Voltage control;
Conference_Titel :
Industry Applications Conference, 1995. Thirtieth IAS Annual Meeting, IAS '95., Conference Record of the 1995 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-3008-0
DOI :
10.1109/IAS.1995.530305