Phase current detector

Details Phase current detector Phase current detector

2006-08-01

2006-08-01

Ip, Paul (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S803000, C318S811000, C363S037000, C363S040000, C363S098000

Reexamination Certificate

active

07084601

ABSTRACT:
A first condenser is connected between output terminals of a rectifier circuit which receives an AC power as an input, and a three phase inverter is connected in parallel with respect to the first condenser, and output of the three phase inverter is supplied to a motor, and a second condenser is connected in parallel to the input side of the three phase inverter, and a current detector is connected between the first condenser and the second condenser, and a third condenser is connected in parallel to the first condenser at a position slightly power side with respect to the current detector, and the capacitance of the second condenser is determined as small as possible within the range in which power devices are not destroyed by surge voltage due to switching, therefore, ringing is suppressed, and taking of current is performed rapidly and with high accuracy.

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