Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1980-10-23
1982-07-06
Rubinson, Gene Z.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318811, H02P 540
Patent
active
043385583
ABSTRACT:
A sine wave of a frequency to be generated in an inverter is compared with a triangular wave having a frequency N times (N: 15, 9, 3, 1) the frequency of the sine wave, so that a modulated pulse train is generated thereby to control the inverter. This inverter supplies power to an induction motor. With the increase in motor speed, N is reduced until it finally becomes 1. When the inverter transfers from an idle state to an active state, N is inhibited from becoming 1 but set to 3 even if the motor is running at high speed.
REFERENCES:
patent: 3694718 (1972-09-01), Graf et al.
patent: 3700987 (1972-10-01), Deering
patent: 3731169 (1973-05-01), Burgholte et al.
patent: 3967173 (1976-06-01), Stich
Ibamoto Masahiko
Narita Hiroshi
Okamatsu Shigetoshi
Tsuboi Takashi
Hitachi , Ltd.
Rubinson Gene Z.
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