Two-stage commutation circuit for an inverter

Details Two-stage commutation circuit for an inverter Two-stage commutation circuit for an inverter

1978-08-23

1979-12-25

Shoop, William M.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 79, 363135, H02M 7515

Patent

active

041808533

ABSTRACT:
A two-stage commutation circuit for an inverter, each having a different energy storage capability, commutates the main semiconductor switches by creating a commutation pulse suitable for the different levels of load current. This improves overall inverter efficiency by decreasing the circulating commutation current at light loads due to reduced size of the commutation and makeup pulses utilized at the lower load current levels. The control circuit for the dual commutation circuits includes a voltage detector for sensing the level of the DC input voltage and current detectors for sensing the times at which the load current is essentially zero so that the transistion between the commutation circuits will occur without perturbations in the cyclic operation of the inverter.

REFERENCES:
patent: 3249844 (1966-05-01), Jensen
patent: 3805141 (1974-04-01), Pompa, Jr. et al.
patent: 4060757 (1977-11-01), McMurray

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