Motor drive device and integrated circuit device for motor...

Details Motor drive device and integrated circuit device for motor... Motor drive device and integrated circuit device for motor...

2007-11-13

2007-11-13

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S132000, C318S434000, C318S599000, C318S432000, C318S434000

Reexamination Certificate

active

11371243

ABSTRACT:
A three-phase DC motor output stage including a predriver that supplies drive voltages to power MOSFETs supplies output voltages to three-phase coils, monitors whether each of gate-to-source voltages of the power MOSFETs is greater than or equal to a predetermined voltage and thereby detects a current zero cross, and employs the output of such current zero cross detection in PLL control for controlling energization switching timing and thereby forms drive voltages of 180-degree energization. Lower hooks with a voltage minimum phase as GND and upper hooks with a voltage maximum phase as a source are set as patterns alternately repeated for every electrical angle of 60 degrees. The patterns are expressed in linear approximation to generate sine wave-like drive voltages, thereby causing sine wave-like currents to flow into the three-phase coils.

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patent: 10-341588 (1998-12-01), None
patent: 2000-201495 (2000-07-01), None

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