Device and method for controlling supply of current and static capacitance to compressor

A device for controlling supply of current and static capacitance to a compressor comprising:

• a first controlling part for generating a driving turn on/off signal for the compressor according to a user's selection;
• a first switch for supplying, or cutting off the supplying of a utility voltage to the compressor in response to the driving turn on/off signal;
• a second controlling part for generating a phase control signal and a switching control signal for the utility voltage depending on a size of the utility voltage;
• a current controlling part having an internal circuit changeable in response to the switching control signal and the phase control signal, for supplying a small current of a limited size to a main winding of the compressor in starting of the compressor in response to the phase control signal and for supplying a regular current of the utility voltage to the main winding after the starting of the compressor;
• and a static capacitance controlling part having an internal circuit changeable in response to the switching control signal, for supplying both a starting static capacitance and an operative static capacitance to a supplementary winding in the starting of the compressor, and for supplying only the operative static capacitance after the starting of the compressor,
• wherein the current controlling part includes:
• a second switch for switching on/off between an output contact point of the first switch and the main winding in response to the switching control signal;
• and
• a phase controlling part connected in parallel to the second switch between an input contact point and an output contact point thereof for controlling a phase of a voltage to be supplied to the main winding depending on a switching on/off state of the second switch and the phase control signal;
• and
• wherein the static capacitance controlling part includes:
• a third switch having an input terminal connected to an output side of the current controlling part for operating in response to the switching control signal;
• and
• a static capacitance generating part having a first input terminal connected to an output contact point of the third switch, a second input terminal connected to an output contact point of the first switch, and an output terminal connected to the supplementary winding, for providing a required static capacitance to the supplementary winding depending on switching on/off states of the second switch and the third switch.

A device for controlling supply of current and static capacitance to a compressor comprising:

• a first controlling part for generating a driving turn on/off signal for the compressor according to a user's selection;
• a first switch for supplying, or cutting off the supplying of a utility voltage to the compressor in response to the driving turn on/off signal;
• a second controlling part for generating a phase control signal and a switching control signal for the utility voltage depending on a size of the utility voltage;
• a current controlling part having an internal circuit changeable in response to the switching control signal and the phase control signal for providing a small sized limited current to the supplementary winding of the compressor according to the phase control signal in starting of the compressor, and a current of a size great corresponding to the utility to the main winding after the starting of the compressor;
• and
• a static capacitance controlling part having an internal circuit changeable in response to the switching control signal, for supplying both a starting static capacitance and an operative static capacitance to the supplementary winding in the starting of the compressor, and for supplying only the operative static capacitance after the starting of the compressor, the static capacitance controlling part having an internal function for preventing a surge current caused by a momentary discharge.

A device for controlling supply of current and static capacitance to the compressor comprising:

• a first controlling part for generating a driving turn on/off signal for the compressor according to a user's selection;
• a first switch for supplying, or cutting off the supplying of a utility voltage to the compressor in response to the driving turn on/off signal;
• a temperature sensing part for sensing an external temperature and forwarding the sensed temperature;
• a second controlling part for generating a phase control signal and a switching control signal for the utility voltage depending on a size of the utility voltage and the external temperature;
• a current controlling part having an internal circuit changeable in response to the switching control signal and the phase control signal for providing a small sized limited current to the supplementary winding of the compressor according to the phase control signal in starting of the compressor, and a current of the utility voltage to the main winding after the starting of the compressor;
• and
• a static capacitance controlling part having an internal circuit changeable in response to the switching control signal, for supplying both a starting static capacitance and an operative static capacitance to the supplementary winding in the starting of the compressor, and for supplying only the operative static capacitance after the starting of the compressor.

A device for controlling supply of current and static capacitance to a compressor comprising:

• a first controlling part for generating a driving turn on/off signal for the compressor according to a user's selection;
• a first switch for supplying, or cutting off the supplying of a utility voltage to the compressor in response to the driving turn on/off signal;
• a second controlling part for generating a phase control signal and a switching control signal for the utility voltage depending on a size of the utility voltage, and providing a signal for displaying a state of a current value according to the current value to a main winding;
• a current controlling part having an internal circuit changeable in response to the switching control signal and the phase control signal for providing a small sized limited current to the supplementary winding of the compressor according to the phase control signal in starting of the compressor, and a regular sized current of the utility voltage to the main winding after the starting of the compressor;
• and
• a current detecting part connected to an output side of the current controlling part for detecting a current to the main winding of the compressor and providing to the second controlling part;
• a display part for displaying a state of the current to the main winding in response to the display signal;
• and
• a static capacitance controlling part having an internal circuit changeable in response to the switching control signal, for supplying both a starting static capacitance and an operative static capacitance to the starting supplementary winding in the starting of the compressor, and for supplying only the operative static capacitance after the starting of the compressor.

A device for controlling supply of current and static capacitance to a compressor comprising:

• a first controlling part for generating a driving turn on/off signal for the compressor according to a user's selection;
• a first switch for supplying, or cutting off the supplying of a utility voltage to the compressor in response to the driving on/off signal;
• a second controlling part for generating a phase control signal and a switching control signal for the utility voltage variable with a size of the utility voltage and a current to the main winding of the compressor;
• a current controlling part having an internal circuit changeable in response to the switching control signal and the phase control signal for providing a small sized limited current to the supplementary winding of the compressor according to the phase control signal in starting of the compressor, and a regular sized current of the utility voltage to the main winding after the starting of the compressor;
• and
• a current detecting part connected to an output side of the current controlling part for detecting a current to the main winding of the compressor and providing to the second controlling part;
• and
• a static capacitance controlling part having an internal circuit changeable in response to the switching control signal, for supplying both a starting static capacitance and an operative static capacitance to the starting supplementary winding in the starting of the compressor, and for supplying only the operative static capacitance after the starting of the compressor.

A device for controlling supply of current and static capacitance to a compressor comprising:

• a first controlling part for generating a driving turn on/off signal for the compressor according to a user's selection;
• a first switch for supplying a utility voltage to the compressor in response to the driving turn on/off signal;
• a second controlling part for generating a switching control signal different in starting of the compressor and after the starting of the compressor;
• a current controlling part having a great initial resistance reversely proportional to a temperature thereof and an internal circuit changeable in response to the switching control signal for limiting the current of the utility voltage to the main winding of the compressor in the starting of the compressor, and providing the current of the utility voltage to the main winding after the starting of the compressor;
• and
• a static capacitance controlling part having an internal circuit changeable in response to the switching control signal, for supplying both a starting capacitance and an operative static capacitance to the starting supplementary winding in the starting of the compressor, and for supplying only the operative static capacitance after the starting of the compressor.

A method for controlling supply of current and static capacitance to a compressor, comprising the following steps:

• (a) providing a utility voltage to the compressor;
• (b) during starting of the compressor, limiting a current of the utility voltage to a main winding of the compressor, and providing starting static capacitances of all of the currents to the main winding together with an operative static capacitance of the utility voltage to a supplementary winding of the compressor;
• and
• (c) after the starting of the compressor, providing an operative static capacitance of the current of the utility voltage to the supplementary winding, and the current of the utility voltage to the main winding as it is.