Motor control system and vacuum pump equipped with the motor...

Details Motor control system and vacuum pump equipped with the motor... Motor control system and vacuum pump equipped with the motor...

2007-07-17

2007-07-17

Duda, Rina (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S432000, C318S254100, C318S132000, C318S434000

Reexamination Certificate

active

10935964

ABSTRACT:
A motor control system has a rotary member, a motor for imparting a torque to the rotary member, a motor driving circuit for supplying power to the motor, and a drive control circuit for controlling a motor current supplied to the motor. An upper limit value of the motor current supplied to the motor is set so as to be variable. At the start of the motor, the drive control means controls the motor current by using the upper limit value as a set value.

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patent: 6334503 (2002-01-01), Fukumura et al.
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patent: 6354805 (2002-03-01), M.o slashed.ller
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patent: 0883042 (1998-12-01), None
Husain, Ehsani: “Torque ripple minimization in switched reluctance motor drives by PWM current control” IEEE Transactions on Power Electronics, [Online] vol. 11, No. 1, 1996, pp. 83-88, XP002348150 Retrieved from the Internet: URL:http://ieeexplore.ieee.org/ie13/63/10248/00484420.pdf> [retrieved on Oct. 7, 2005] *abstract* pp. 86, 87, paragraph V * *figure 4*.

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