Device for suppressing higher harmonic current of power source
First Claim
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1. A device for suppressing higher harmonic current of a power source, comprising:
- switching means for causing a capacitor, included in a capacitor input type rectifying circuit for a commercial power source, to selectively charge or discharge;
voltage detecting means for receiving and detecting a sinusoidal voltage out of the commercial power source and generating an output signal only when an absolute value of said received and detected sinusoidal voltage is lower than a predetermined voltage; and
control means for turning on said switching means in response to receiving the output signal from said voltage detecting means to thereby cause the capacitor to release a charge only when the sinusoidal voltage is lower than the predetermined voltage.
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Abstract
A device for suppressing higher harmonic current of a power source and applicable to a switching power source, air conditioner with an inverter, lamp regulator or the like. The device suppresses higher harmonic current by increasing the conduction angle of input current.
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Citations
10 Claims
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1. A device for suppressing higher harmonic current of a power source, comprising:
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switching means for causing a capacitor, included in a capacitor input type rectifying circuit for a commercial power source, to selectively charge or discharge; voltage detecting means for receiving and detecting a sinusoidal voltage out of the commercial power source and generating an output signal only when an absolute value of said received and detected sinusoidal voltage is lower than a predetermined voltage; and control means for turning on said switching means in response to receiving the output signal from said voltage detecting means to thereby cause the capacitor to release a charge only when the sinusoidal voltage is lower than the predetermined voltage. - View Dependent Claims (2, 3, 4, 5)
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6. A device for suppressing higher harmonic current of a power source, comprising:
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a switch causing a capacitor, included in a capacitor input type rectifying circuit for a commercial power source, to selectively charge or discharge; a voltage detector receiving and detecting a sinusoidal voltage out of the commercial power source and generating an output signal only when an absolute value of said received and detected sinusoidal voltage is lower than a predetermined voltage; and a controller turning on said switching means in response to receiving the output signal from said voltage detector to thereby cause the capacitor to release a charge only when the sinusoidal voltage is lower than the predetermined voltage. - View Dependent Claims (7, 8, 9, 10)
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Specification