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CONTROLLING AN AC MOTOR WITH CHANGING OPTIMIZATION

IP.com Disclosure Number: IPCOM000009669D
Original Publication Date: 2000-Jan-01
Included in the Prior Art Database: 2002-Sep-10

Publishing Venue

Motorola

Related People

Authors:
Radim Visinka Leos Chalupa

Abstract

The proposal relates to controlling an AC elec- tric motor (cf. figure), for example starter/generator for a combustion engine. The stator frequency is determined by adding an optimal slip frequency of the motor to the desired rotational frequency of the rotor. The stator voltage is related to the difference between actual rotational frequency and desired rotational frequency of the rotor. A pulse width modulation unit receiving the desired stator frequen- cy and voltage controls an inverter to supply the appropriate coil voltages to the motor.