Method and apparatus for determining a critical dwell time for u

Details Method and apparatus for determining a critical dwell time for u Method and apparatus for determining a critical dwell time for u

1997-10-01

2000-01-11

Ip, Paul

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

318811, 318254, H02P 517

Patent

active

060144971

ABSTRACT:
A method and apparatus for determining the critical dwell time required between firing pulses generated by a PWM inverter to eliminate greater than twice overvoltage on motor supply lines. Critical dwell time is correlated with line parameters including inductance and resistance per unit length and is then provided to a controller to alter voltages provided to a motor to eliminate overvoltage.

REFERENCES:
patent: 3958131 (1976-05-01), Mozdzer
patent: 4417448 (1983-11-01), Horn et al.
patent: 4468725 (1984-08-01), Venturiny
patent: 4578746 (1986-05-01), Gyugyi et al.
patent: 5581169 (1996-12-01), Kerkman et al.
patent: 5625550 (1997-04-01), Leggate et al.

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