EFFICIENT POWER TRANSMITTING TERMINAL, CONTACTLESS POWER TRANSMISSION DEVICE AND POWER TRANSMISSION METHOD
First Claim
1. An efficient power transmitting terminal, transmitting energy to its isolated power receiving terminal, comprising:
- a DC-AC voltage converter configured to receive a DC voltage to output a AC voltage with a preset frequency;
a power transmitting portion, comprising a primary transmitter coil, wherein the primary transmitter coil receives the AC voltage to generate an alternating magnetic field, to transmit energy to the power receiving terminal; and
a soft-switching control circuit, connected between the DC-AC voltage converter and the power transmitting portion, and configured to adjust an equivalent output impedance of the DC-AC voltage converter, so that the equivalent output impedance is inductive impedance;
wherein the preset frequency is consistent with a system operating frequency at the power transmitting terminal and the power receiving terminal.
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Accused Products
Abstract
An efficient power transmitting terminal, a contactless power transmission device and a power transmission method are disclosed herein. By adjusting the equivalent output impedance of the DC-AC voltage converter through a soft-switching control circuit composed of an inductor or an inductor and a capacitor, the equivalent output impedance is maintained at inductive impedance. According to the feature of current of inductive impedance lagging behind the voltage, the voltage of the switching device in the DC-AC voltage converter reduces to zero before switching-on, to achieve zero-voltage switching-on.
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Citations
30 Claims
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1. An efficient power transmitting terminal, transmitting energy to its isolated power receiving terminal, comprising:
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a DC-AC voltage converter configured to receive a DC voltage to output a AC voltage with a preset frequency; a power transmitting portion, comprising a primary transmitter coil, wherein the primary transmitter coil receives the AC voltage to generate an alternating magnetic field, to transmit energy to the power receiving terminal; and a soft-switching control circuit, connected between the DC-AC voltage converter and the power transmitting portion, and configured to adjust an equivalent output impedance of the DC-AC voltage converter, so that the equivalent output impedance is inductive impedance; wherein the preset frequency is consistent with a system operating frequency at the power transmitting terminal and the power receiving terminal. - View Dependent Claims (2, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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3. (canceled)
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4. (canceled)
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5. (canceled)
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6. (canceled)
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7. A contactless power transmission method, transmitting energy through a power transmitting terminal and an isolated power receiving terminal, comprising:
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receiving a DC voltage via a DC-AC voltage converter to output an AC voltage with a preset frequency, wherein the preset frequency is consistent with a system operating frequency of the power transmitting terminal and the power receiving terminal; adjusting an equivalent output impedance of the DC-AC voltage converter, so that the equivalent output impedance is an inductive impedance; receiving the AC voltage to generate an alternating magnetic field, to transmit energy to the power receiving terminal; and inducing the alternating magnetic field to obtain a corresponding alternating voltage, to convert the alternating voltage to an appropriate DC voltage to supply an output load. - View Dependent Claims (8, 9, 10, 11)
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12. (canceled)
Specification