Electric power conversion systems – Current conversion – Having plural converters for single conversion
Patent
1980-01-23
1981-12-15
Shoop, William M.
Electric power conversion systems
Current conversion
Having plural converters for single conversion
323207, 323210, G05F 170, H02M 7155
Patent
active
043062830
ABSTRACT:
The two secondary windings of a transformer the primary winding of which is connected to an AC power supply are each provided with a controlled rectifying circuit. The DC sides of the rectifying circuits are connected in series to supply power to DC motors. One of the secondary windings is detachably connected with a capacitor bank. The capacity of the capacitor bank is selected so that the power factor of the converter can be improved to a satisfactory value when the two rectifying circuits are both controlled to produce output voltages. The capacitor bank becomes connected in response to the fact that the current in the primary winding of a transformer has arrived at a predetermined value.
REFERENCES:
patent: 3932808 (1976-01-01), Frank
patent: 4020411 (1977-04-01), Tsuboi et al.
patent: 4144559 (1979-03-01), Okumura et al.
patent: 4181932 (1980-01-01), Fujiwara
T. I. Nordin et al.; "Advantages of Thyristor Locomotives and Experience in Sweden", IEEE Transactions on Industrial Application, vol. IA-8, No. 3, May/Jun. 1972, pp. 316-337.
Horie Tatsuo
Kiwaki Hisakatsu
Miura Shozuchi
Onoda Yoshimitsu
Suzuki Katsuaki
Hitachi , Ltd.
Shoop William M.
Wong Peter S.
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