Inverter device

Details Inverter device Inverter device

2006-10-16

2010-12-21

Masih, Karen (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S474000, C318S139000

Reexamination Certificate

active

07855527

ABSTRACT:
The inverter device contains the following structure: an inverter circuit which has upper-arm switching elements that are connected on a positive side of a DC power source and lower-arm switching elements that are connected on a negative side of the DC power source; a current sensor that detects current flowing between the DC power source and the inverter circuit; and a control circuit that controls the inverter circuit by a PWM driving so that the inverter circuit outputs AC current to the motor. The control circuit provides a carrier cycle with a first correction and provides the successive cycle with a second correction, by which the current sensor can detect phase current of the motor. A ripple current caused by the first correction and a ripple current caused by the second correction are opposite in polarity.

REFERENCES:
patent: 2009/0323232 (2009-12-01), Suzuki et al.
patent: 2000-333465 (2000-11-01), None
patent: 2001-327173 (2001-11-01), None
patent: 2003-135342 (2003-05-01), None
patent: 2003-189670 (2003-07-01), None
patent: 2003-284374 (2003-10-01), None
patent: 2004-282884 (2004-10-01), None
International Search Report for Application No. PCT/JP2006/320528, dated Dec. 12, 2006.

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