Method and apparatus for controlling a multi-phase electric moto

Details Method and apparatus for controlling a multi-phase electric moto Method and apparatus for controlling a multi-phase electric moto

1998-11-13

2000-06-06

Riley, Shawn

Electricity: motive power systems

Induction motor systems

Primary circuit control

H02P 528

Patent

active

060722983

ABSTRACT:
An electric motor (12) has multiple phase inputs (22, 24, 26). Each phase input can be coupled to a supply voltage (VM) by a high side driver transistor (40, 46, 52), or can be coupled to ground by a low side driver transistor (42, 48 54). A control circuit (30) turns each of the high and low side driver transistors on and off according to a predetermined sequence. As each of the low side driver transistors is turned off, another low side driver transistor is turned on in a manner so that a current through the low side driver transistor which is being turned off decreases at a linear rate, and so that a current through the low side driver transistor which is being turned on simultaneously increases at the same linear rate.

REFERENCES:
patent: 5517402 (1996-05-01), Ikeda et al.
patent: 5617308 (1997-04-01), Weise et al.
patent: 5877602 (1999-03-01), Kondoch et al.

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