Method and apparatus for a variable frequency inverter system ha

Details Method and apparatus for a variable frequency inverter system ha Method and apparatus for a variable frequency inverter system ha

1979-04-24

1981-05-26

Shoop, William M.

Electricity: motive power systems

Induction motor systems

Primary circuit control

363 37, 363 58, 363 79, 363 96, H02P 742

Patent

active

042700787

ABSTRACT:
An inverter system including a controlled direct current (d.c.) power source for providing a variable d.c. voltage to a variable output frequency inverter circuit by way of a suitable d.c. link, includes suitable circuitry for detecting a commutation fault or shoot-through condition within the inverter circuit and for taking appropriate remedial action to correct such condition. The shoot-through condition is determined as a function of the d.c. input current to the inverter circuit, the output alternating current (a.c.) of the inverter circuit and the extant condition of the load. In the particular embodiment of the invention illustrated, the load is an a.c. motor and the load condition sensed is whether the motor is in the running or idle mode of operation.

REFERENCES:
patent: 4066938 (1978-01-01), Turnbull
patent: 4183081 (1980-01-01), Cutler et al.

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