Inverter circuit and compressor

Details Inverter circuit and compressor Inverter circuit and compressor

2008-07-15

2008-07-15

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S807000

Reexamination Certificate

active

07400109

ABSTRACT:
An inverter circuit includes a temperature measuring section for measuring a temperature of switching elements forming a powering section, a motor speed detector for detecting a speed of a motor, a carrier frequency determiner for determining a carrier frequency based on a temperature of the switching elements and a speed of the motor, and an output waveform determining circuit for determining a duty in response to a load applied to the motor and for switching a carrier frequency.

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International Search Report for application No. PCT/JP2005/007362 dated Aug. 24, 2005.

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