POWER TRANSMITTER AND WIRELESS POWER TRANSFER SYSTEM
First Claim
1. A power transmitter for supplying power to a power receiver connected to a load, the power transmitter comprising:
- a first coil configured to wirelessly transmit the power to a second coil of the power receiver;
a converter configured to receive direct current (DC) power, convert the DC power into alternating current (AC) power, and supply the AC power to the first coil; and
a controller configured to execute power control for causing power supplied to the load to approach desired power,wherein the controller executes frequency control of the AC power and at least one control of phase shift control of the converter and voltage control of the DC power as the power control, andwhen the power supplied to the load cannot be caused to approach the desired power by the frequency control, the controller executes at least one of the phase shift control and the voltage control.
1 Assignment
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Accused Products
Abstract
A power transmitter according to an aspect of the present disclosure includes a first coil to wirelessly transmit power to a second coil of a power receiver; a converter to receive direct current (DC) power, convert the DC power into alternating current (AC) power, and supply the AC power to the first coil; and a controller to execute power control for causing power supplied to a load to approach desired power. The controller executes frequency control of the AC power and at least one control of phase shift control of the converter and voltage control of the DC power as the power control. When the power supplied to the load cannot be caused to approach the desired power by the frequency control, the controller executes at least one of the phase shift control and the voltage control.
17 Citations
18 Claims
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1. A power transmitter for supplying power to a power receiver connected to a load, the power transmitter comprising:
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a first coil configured to wirelessly transmit the power to a second coil of the power receiver; a converter configured to receive direct current (DC) power, convert the DC power into alternating current (AC) power, and supply the AC power to the first coil; and a controller configured to execute power control for causing power supplied to the load to approach desired power, wherein the controller executes frequency control of the AC power and at least one control of phase shift control of the converter and voltage control of the DC power as the power control, and when the power supplied to the load cannot be caused to approach the desired power by the frequency control, the controller executes at least one of the phase shift control and the voltage control. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power transmitter for supplying power to a power receiver connected to a load, the power transmitter comprising:
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a first coil configured to wirelessly transmit the power to a second coil of the power receiver; a converter configured to receive power, convert the power into alternating current (AC) power, and supply the converted AC power to the first coil; and a controller configured to change a parameter for controlling the AC power, wherein the controller changes the parameter such that power supplied to the load approaches desired power, based on a power change rate indicating a change amount of the power supplied to the load with respect to a predetermined change amount of the parameter from a reference value. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification