Power control circuit

A PWM controller operated by steps for m≧1:

• checking if a first terminal signal appears at a first input terminal;
• if no first terminal signal appears at the first input terminal, modulating a high-frequency waveform generated by a high-frequency-waveform generator with a first baseband mth waveform generated by a first baseband generator through a first modulator, and modulating the high-frequency waveform generated by the high-frequency-waveform generator with a second baseband mth waveform generated by a second baseband generator through a third modulator;
• if a first terminal signal appears at the first input terminal, stopping the high-frequency-waveform generator from generating high-frequency waveform, and 180°-phase-shifting the first terminal signal received at the first input terminal, and modulating the phase-shifted first terminal signal received at the first input terminal after the 180°-phase-shifting step with the first baseband mth waveform generated by the first baseband generator through a second modulator, and modulating the phase-shifted first terminal signal received at the first input terminal after the 180°-phase-shifting step with the second baseband mth waveform generated by the second baseband generator through a fourth modulator;
• checking if a second terminal signal appears at the second input terminal;
• if a second terminal signal appears at the second input terminal, adjusting a duty cycle of the modulated waveforms either out from the first modulator or the second modulator and outputting the duty-adjusted waveform after the duty-adjusted step, and adjusting a duty cycle of the modulated waveforms either out from the third modulator or the fourth modulator and outputting the duty-adjusted waveform after the duty-adjusted step, and adjusting a first baseband m+1th waveform generated by the first baseband generator and a second baseband m+1th waveform generated by the second baseband generator;
• and
• if no second terminal signal appears at the second input terminal, outputting the modulated waveforms either out from the first modulator or the second modulator, and outputting the modulated waveforms either out from the third modulator or the fourth modulator.

A switching circuit, comprising:

• a dc power source;
• a switch;
• a first coil, wherein the dc power source, the first coil and the switch electrically connected in series with each other by the sequence;
• a reaction circuit in parallel with the first coil, wherein the reaction circuit allows ac Lenz current to flow through the reaction circuit and prohibits dc from the dc power source from flowing through the reaction circuit, and the reaction circuit comprises a damper, an action/reaction isolation circuit and a coupler electrically connected in series with each other, and the action/reaction isolation device is for allowing an ac Lenz current produced by the switch in open state to flow through the reaction circuit and prohibiting a dc from the dc power source from flowing through the reaction circuit, and the damper is for stabilizing the ac Lenz current flowing through the reaction circuit, and the coupler is for coupling a waveform of the ac Lenz current flowing through the reaction circuit;
• and
• A PWM controller operated by steps for m≧1:
• checking if a first terminal signal appears at a first input terminal, wherein the coupler couples the waveform of the ac Lenz current flowing through the reaction circuit into the first input terminal;
• if no first terminal signal appears at the first input terminal, modulating a high-frequency waveform generated by a high-frequency-waveform generator with a mth baseband waveform generated by a baseband generator;
• if a first terminal signal appears at the first input terminal, stopping the high-frequency-waveform generator from generating high-frequency waveform, and 180°-phase-shifting the first terminal signal received at the first input terminal, and modulating the phase-shifted first terminal signal received at the first input terminal after the 180°-phase-shifting step with the mth baseband waveform generated by the baseband generator;
• checking if a second terminal signal appears at a second input terminal, wherein the second terminal signal is a signal from an emergency procedure, a signal from manual control or a signal from sensor such as voltage sensor, current sensor, thermal sensor or chemical sensor;
• if the second terminal signal appears at the second input terminal, adjusting a duty cycle of the modulated waveform after the modulating step and outputting the duty-adjusted waveform after the duty-adjusted step for controlling the switch, and adjusting an m+1th baseband waveform generated by the baseband generator;
• and
• if no second terminal signal appears at the second input terminal, outputting the modulated waveform after the modulating step for controlling the switch.

A switching circuit, comprising:

• a dc power source;
• a first switch;
• a second switch;
• a first coil, wherein the dc power source, the second switch, the first coil and the first switch electrically connect in series with each other by the sequence;
• a reaction circuit in parallel with the first coil, wherein the reaction circuit allows ac Lenz current to flow through the reaction circuit and prohibits dc from the dc power source from flowing through the reaction circuit, and the reaction circuit comprises a damper, an action/reaction isolation circuit and a coupler electrically connected in series with each other, and the action/reaction isolation device is for allowing an ac Lenz current produced by the switch in open state to flow through the reaction circuit and prohibiting a dc from the dc power source from flowing through the reaction circuit, and the damper is for stabilizing the ac Lenz current flowing through the reaction circuit, and the coupler is for coupling a waveform of the ac Lenz current flowing through the reaction circuit;
• and
• A PWM controller operated by steps for m≧1:
• checking if a first terminal signal appears at a first input terminal, wherein the coupler couples the waveform of the ac Lenz current flowing through the reaction circuit into the first input terminal;
• if no first terminal signal appears at the first input terminal, modulating a high-frequency waveform generated by a high-frequency-waveform generator with a first baseband mth waveform generated by a first baseband generator through a first modulator, and modulating the high-frequency waveform generated by the high-frequency-waveform generator with a second baseband mth waveform generated by a second baseband generator through a third modulator;
• if a first terminal signal appears at the first input terminal, stopping the high-frequency-waveform generator from generating high-frequency waveform, and 180°-phase-shifting the first terminal signal received at the first input terminal, and modulating the phase-shifted first terminal signal received at the first input terminal after the 180°-phase-shifting step with the first baseband mth waveform generated by the first baseband generator through a second modulator, and modulating the phase-shifted first terminal signal received at the first input terminal after the 180°-phase-shifting step with the second baseband mth waveform generated by the second baseband generator through a fourth modulator;
• checking if a second terminal signal appears at the second input terminal, wherein the second terminal signal is a signal from an emergency procedure, a signal from manual control or a signal from sensor such as voltage sensor, current sensor, thermal sensor or chemical sensor;
• if a second terminal signal appears at the second input terminal, adjusting a duty cycle of the modulated waveforms either out from the first modulator or the second modulator and outputting the duty-adjusted waveform after the duty-adjusted step for controlling the first switch, and adjusting a duty cycle of the modulated waveforms either out from the third modulator or the fourth modulator and outputting the duty-adjusted waveform after the duty-adjusted step for controlling the second switch, and adjusting a first baseband m+1th waveform generated by the first baseband generator and a second baseband m+1th waveform generated by the second baseband generator;
• and
• if no second terminal signal appears at the second input terminal, outputting the modulated waveforms either out from the first modulator or the second modulator for controlling the first switch, and outputting the modulated waveforms either out from the third modulator or the fourth modulator for controlling the second switch.

A switching circuit, comprising:

• a dc power source;
• a switch;
• a first coil, wherein the dc power source, the first coil and the switch electrically connected in series with each other by the sequence;
• a reaction circuit in parallel with the first coil, wherein the reaction circuit comprises a damper, an action/reaction isolation circuit and a coupler electrically connected in series with each other, and the action/reaction isolation device is for allowing an ac Lenz current produced by the switch in open state to flow through the reaction circuit and prohibiting a dc from the dc power source from flowing the reaction circuit, and the damper is for stabilizing the ac Lenz current flowing through the reaction circuit;
• and
• a PWM controller for controlling the switch.

A magnetic amplifier, comprising:

• a first magnetic core;
• a first coil coiling around the first magnetic core for receiving ac Lenz current flowing through a first reaction circuit, wherein the first reaction circuit comprises the first coil, a first damper and a first action/reaction isolation device electrically connected in series with each other, and the first action/reaction isolation device is for allowing an ac Lenz current to flow through the first reaction circuit but prohibiting dc from flowing through the first reaction circuit, and the first damper is for stabilizing the ac Lenz current flowing through the first reaction circuit;
• a second coil coiling around the first magnetic core for receiving dc signal input;
• and
• a third coil coiling around the first magnetic core for outputing a first ac output.