Inverter control system

Details Inverter control system Inverter control system

1978-03-17

1979-06-26

Shoop, William M.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 49, 363 56, 363 96, 363 97, H02M 118, H02M 7515, H02M 7537

Patent

active

041595157

ABSTRACT:
A control system is provided for the accurately timed control of switching inverter circuitry; for example, an inverter that produces a 115VAC/60HZ output from a 12 V DC source such as a vehicle battery. The control system utilizes an internal reference source and supervisory control circuitry to determine accurate and orderly start up, shut down, control of the inverter switching elements and automatic shut down upon the occurrence of predetermined sensed conditions including low input voltage from the source and excessive output current through the load. The switching elements of the inverter are each controlled to produce respective outputs of predetermined active/inactive duty cycles each switching cycle with an accurate inactive period being established between the active periods of each switching element. Thus, induced transients due to inductive loads and the like are allowed to decay to safe levels prior to the switching transistion between switching elements to reduce undesirable effects on the inverter circuitry and the switching elements.

REFERENCES:
patent: 3609507 (1971-09-01), Beck
patent: 3657631 (1972-04-01), Martens et al.
patent: 3821632 (1974-06-01), Rylicki
patent: 3859586 (1975-01-01), Wadlington

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