Title:
【発明の名称】無停電電源装置
Document Type and Number:
Japanese Patent JP2989029
Kind Code:
B2
Abstract:
PURPOSE:To remove a reactance circuit by charging a storage battery of an inverter DC side at the time of normal AC power source, so controlling that a harmonic current generated from a load facility does not flow to the AC power source side, and sending an AC voltage from the inverter to the facility at the time of power interruption. CONSTITUTION:At the time of normal AC power source, a power source voltage ES is detected by an AC power source detector 114, a load current IL is detected by a load current detector 115, and momentary real power P and imaginary power Q are obtained by a power calculator 107. Here, since basic wave components of the load currents Ialpha, Ibeta are converted into DC components PDC, QDC and harmonic wave components are converted into AC components PAC, QAC, the AC components PAC, QAC equivalent to the harmonic current components of the load to be suppressed by an inverter are guided by a high pass filter 108, and sent to a code inverter 109. The inverter 109 inverts the codes of the AC components PAC, QAC.
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Inventors:
SHIODA TAKESHI
Application Number:
JP8762291A
Publication Date:
December 13, 1999
Filing Date:
March 26, 1991
Export Citation:
Assignee:
TOYO DENKI SEIZO KK
International Classes:
H02J3/01; H02J3/32; H02J7/34; H02J9/06; (IPC1-7): H02J9/06; H02J3/32; H02J7/34
Domestic Patent References:
| JP61121726A | ||||
| JP63181620A | ||||
| JP63144725A | ||||
| JP62254632A | ||||
| JP2197220A | ||||
| JP1177832A |