Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1987-01-21
1988-01-26
Beha, Jr., William H.
Electricity: motive power systems
Induction motor systems
Primary circuit control
363 37, 363 58, 363137, H02M 545
Patent
active
047218975
ABSTRACT:
A reactive power processing circuit for a current source GTO invertor in which a reactive current generated from a load of the GTO invertor is rectified by means of a fly wheel circuit and is sent to a capacitor so as to store a commutation surge voltage generated whenever a commutation of the invertor occurs, an excessive charge voltage across the capacitor is regenerated to a direct current output side of a power rectifier, and a pair of GTO (Gate Turn Off Thyristors) thyristors are connected between the capacitor and the direct current output side of the power rectifier in their forward directions so as to carry out a discharge operation for the excessive charge voltage across the capacitor. Consequently, with the number of circuit elements remarkably reduced, the reactive power processing at times of a high-frequency operation and acceleration/deceleration (variable speed) operation of the invertor can be achieved.
REFERENCES:
patent: 4567555 (1986-01-01), Matsuse et al.
patent: 4580205 (1986-04-01), Matsuse
Conference Record of the 1986 IEEE Industry Applications Society Annual Meeting Part 1.
Kubota Hisao
Matsuse Koki
Beha Jr. William H.
Kabushiki Kaisha Meidensha
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