Power supply for vibrating compressors
First Claim
1. A power supply for vibrating compressors having an inverter for converting d-c into a-c comprising:
- a d-c power source section for applying d-c voltage to said inverter;
current detecting means for detecting a current flowing in a vibrating compressor; and
a control section having a frequency following circuit for generating a frequency following a resonance frequency of said vibrating compressor based on a comparison of the detected current detected by said current detecting means in preceding and succeeding periods and an inverter control circuit for controlling said inverter at said frequency generated by said frequency following circuit to cause the vibrating compressor to be driven by an a-c voltage of a frequency agreeing with the resonance frequency of said vibrating compressor.
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Accused Products
Abstract
A power supply for vibrating compressors having an inverter for converting direct current (d-c) into alternating current (a-c). The power supply includes a d-c power source section for applying d-c voltage to the inverter, a current detecting apparatures for detecting a current flowing in the vibrating compressor, a control section having a frequency following circuit for generating a frequency following the resonance frequency of the vibrating compressor on the basis of a current detected by the current detecting apparatures, and an inverter control circuit for controlling the inverter with the frequency generated by the frequency following circuit. The vibrating compressor is driven by an a-c voltage of the frequency agreeing with the resonance frequency of the vibrating compressor.
42 Citations
27 Claims
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1. A power supply for vibrating compressors having an inverter for converting d-c into a-c comprising:
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a d-c power source section for applying d-c voltage to said inverter; current detecting means for detecting a current flowing in a vibrating compressor; and a control section having a frequency following circuit for generating a frequency following a resonance frequency of said vibrating compressor based on a comparison of the detected current detected by said current detecting means in preceding and succeeding periods and an inverter control circuit for controlling said inverter at said frequency generated by said frequency following circuit to cause the vibrating compressor to be driven by an a-c voltage of a frequency agreeing with the resonance frequency of said vibrating compressor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A power supply for a vibrating compressor, the power supply comprising:
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inverter means for creating a variable a-c voltage and supplying said a-c voltage to the compressor; current detecting means for detecting a current flowing through the compressor; control means connected to said current detecting means and for determining a resonance frequency of the compressor based on a comparison of said current detected by said detecting means in preceding and succeeding periods, said control means being connected to said inverter means and controlling said inverter means to create said a-c voltage at a frequency substantially similar to said resonance frequency. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification