Title :
An advanced permanent magnet motor drive system for battery-powered electric vehicles
Author :
Chan, C.C. ; Chau, K.T.
Author_Institution :
Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong
fDate :
2/1/1996 12:00:00 AM
Abstract :
Availability of high-energy neodymium-iron-boron (Nd-Fe-B) permanent magnet (PM) material has focused attention on the use of the PM synchronous motor (PMSM) drive for electric vehicles (EVs). A new Nd-Fe-B PMSM is proposed for the drive system, which possesses high power density and high efficiency, resulting in greater energy and space savings. The design and optimization of the motor employs finite element analysis and computer graphics. Increasingly, a new PWM inverter algorithm is developed for the drive system, which can handle the nonconstant battery voltage source. An efficiency optimizing control is adopted to further improve the energy utilization of the drive system. Both the control strategy and the PWM generation are implemented in a single-chip microcontroller. As a result, the motor drive achieves high power density, high efficiency, and compactness. A prototype of the 3.2 kW battery-powered drive system has been designed and built for an experimental mini-EV
Keywords :
PWM invertors; computer graphics; controllers; electric machine analysis computing; electric propulsion; electric vehicles; energy conservation; finite element analysis; machine control; microcontrollers; permanent magnet motors; synchronous motor drives; 3.2 kW; Nd-Fe-B; PM synchronous motor drive; PWM inverter algorithm; battery-powered electric vehicles; computer graphics; efficiency optimizing control; energy savings; finite element analysis; high efficiency; high power density; high-energy Nd-Fe-B permanent magnet; neodymium-iron-boron permanent magnet; nonconstant battery voltage source; optimization; permanent magnet motor drive; single-chip microcontroller; space savings; Batteries; Computer graphics; Design optimization; Electric vehicles; Finite element methods; Magnetic materials; Permanent magnet motors; Pulse width modulation; Pulse width modulation inverters; Synchronous motors;
Journal_Title :
Vehicular Technology, IEEE Transactions on
