Electricity: motive power systems – Plural diverse motor controls – Motor-reversing
Patent
1976-08-03
1978-05-09
Schaefer, Robert K.
Electricity: motive power systems
Plural diverse motor controls
Motor-reversing
318269, H02P 516
Patent
active
040889335
ABSTRACT:
A DC motor phase control system is provided in a system having a first controlled rectifier connected to an AC power supply and providing a positive rectified output and a second controlled rectifier providing a negative rectified output. A DC motor is controlled for forward and reverse rotation and is controlled in speed by the firing control of the rectifiers. The pulse indicating the zero point of the AC power supply voltage is delayed according to the actual speed of the motor and the delayed pulse is used as a reference pulse of the controlled firing pulses applied to the controlled rectifiers.
REFERENCES:
patent: 3612974 (1971-10-01), Wolf et al.
patent: 3882365 (1975-05-01), Yemington
patent: 3916276 (1975-10-01), Ottoson
patent: 3947737 (1976-03-01), Kimura et al.
Hashimoto Yoshihiro
Ishida Hiroshi
Kawada Shigeki
Kohari Katsuo
Duncanson Jr. W. E.
Fujitsu Fanuc Limited
Schaefer Robert K.
Tick Daniel Jay
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