WIRELESS ELECTRICAL POWER TRANSMISSION SYSTEM AND ITS CONTROL METHOD
First Claim
1. A wireless electrical power transmission system, comprising a transmitting coil frequency generating circuit and a coil frequency phase tracking and feedback circuit, wherein the transmitting coil frequency generating circuit includes a control circuit, a driving circuit and an inverter circuit, characterized in that:
- the control circuit is controlled by software to output two opposite control signals, each of which controls the opening and closing of a switching tube after passing through the driving circuit, to form high-frequency oscillation in the transmitting coil.
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Accused Products
Abstract
The present invention provides a wireless electrical power transmission system and its control method with good thermal stability. Said system, comprising a transmitting coil frequency generating part and a coil frequency phase tracking and feedback part, the transmitting coil frequency generating part composed of a control circuit, a driving circuit and an inverter circuit, the coil frequency phase tracking and feedback part composed of a frequency detection circuit and a phase locked loop circuit, is characterized in that said control circuit is controlled by software to output two opposite control signals, each of which controls opening and closing of a switch tube after passing through the driving circuit to generate high-frequency oscillation in the coil.
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Citations
4 Claims
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1. A wireless electrical power transmission system, comprising a transmitting coil frequency generating circuit and a coil frequency phase tracking and feedback circuit, wherein the transmitting coil frequency generating circuit includes a control circuit, a driving circuit and an inverter circuit, characterized in that:
the control circuit is controlled by software to output two opposite control signals, each of which controls the opening and closing of a switching tube after passing through the driving circuit, to form high-frequency oscillation in the transmitting coil. - View Dependent Claims (2, 3)
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4. A control method of a wireless electrical power transmission system, characterized by comprising steps of:
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providing control signals P1 and P2 with a frequency fp by a control circuit according to a frequency point fk, wherein fp=fk; opening or closing a switching tube by a driving circuit according to the control signals P1 and P2, so that an alternating voltage is formed at both ends of a transmitting coil, so that high-frequency oscillation of the transmitting coil is started; obtaining a frequency f of the transmitting coil, after the voltage sampling by a voltage comparison circuit; processing the signal of the frequency f of the transmitting coil through a phase locked loop circuit, and feeding the processed signal back to the control circuit together with a phase difference signal; adjusting outputs of the control signals P1 and P2 by the control circuit according to the feedback signal; and repeating the above steps, so that the system is operated stably at the frequency point.
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Specification