Title :
Direct control of air-gap flux in permanent-magnet machines
Author_Institution :
Oak Ridge Nat. Lab., TN, USA
fDate :
12/1/2000 12:00:00 AM
Abstract :
A new field weakening and adjustment technology for PM machines by direct control of air-gap fluxes is introduced. This new technology requires no current decomposition by the inverter eliminating the need for a position sensor. Demagnetization, which normally occurs during field weakening, does not occur with this new method. The field-weakening ratio can reach 10:1 or higher. This technology is robust and particularly useful for, but not limited to, electric vehicle drives and PM generators
Keywords :
air gaps; demagnetisation; machine control; magnetic flux; magnetic variables control; motor drives; permanent magnet generators; permanent magnet motors; PM generators; air-gap flux; demagnetization; direct control; electric vehicle drives; field weakening; field-weakening ratio; permanent-magnet machines; position sensor; Air gaps; DC motors; Demagnetization; Electric vehicles; Government; Magnetic flux; Pulse width modulation; Robustness; Torque control; Voltage control;
Journal_Title :
Energy Conversion, IEEE Transactions on
