Third harmonic auxiliary impulse commutation inverter with...

Details Third harmonic auxiliary impulse commutation inverter with... Third harmonic auxiliary impulse commutation inverter with...

H - Electricity

02

M

321/43, 342/34.1

H02M 1/06 (2006.01)

Patent

CA 1275438

THIRD HARMONIC AUXILIARY-IMPULSE COMMUTATION INVERTER WITH MEANS FOR PRECHARGING COMMUTATION CAPACITOR ABSTRACT OF THE DISCLOSURE In a 3-phase third hanmonic auxiliary impulse commutated electric power inverter the d-c terminals of which are connected, via a circuit having appreciable electrical inductance, to 2 voltage source comprising a battery, the commutation capacitor is precharged by cyclically manipulating the conducting period, of selected main and auxiliary valves of the inverter so that a series of discrete pulses of capacitor charging current flow from the battery through a path comprising the aforesaid circuit, part of the inverter load circuit, and the capacitor, with alternate pulses of current traversing the capacitor in one direction and intermediate pulses traversing it in the opposite direction. Such action continues for a sufficient number of cycles to "ring up" the capacitor to a voltage magnitude more than five times higher than the battery voltage.

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