Electricity transmission sending method and device, and system
First Claim
1. An energy transmitter for wirelessly transmitting electrical energy to an energy receiving device, the energy transmitter comprising:
- a coil comprising at least two mutually perpendicular subcoils, wherein the coil is configured to generate a magnetic field for transmitting electrical energy to the energy receiving device;
a signal sending unit configured to receive a required power signal and an actually received power signal from the energy receiving device, wherein the required power signal includes information of an amount of power required by the energy receiving device and the actually received power signal includes information of power actually received by the energy receiving device;
a controlling unit configured to (a) adjust an amplitude ratio and a phase difference between currents of the at least two mutually perpendicular subcoils in step-like changes towards a same direction at a fixed angle until a direction of the magnetic field returns to an initial position before the stepping;
a sampling and comparing unit configured to (a) obtain and compare the actually received power signals before and after each stepping, and (b) determine the direction of the magnetic field corresponding to a maximum power value of the actually received power signals as an optimal direction of the magnetic field; and
a power transmission unit configured to (a) control the coil to transmit the electrical energy to the energy receiving device in the optimal direction of the magnetic field and (b) adjust an output power so that the power received by the energy receiving device is equal to power represented by the required power signal.
1 Assignment
0 Petitions
Accused Products
Abstract
An electricity transmission sending device includes: a transmission circuit and a coil, where the transmission circuit includes a signal sending unit and a controlling unit, and the coil includes at least two mutually perpendicular subcoils. The signal sending unit is configured to receive a required power signal and an actually received power signal that are sent by the electricity transmission receiving device; and the controlling unit is configured to adjust a magnetic field direction in which wireless electricity transmission to the electricity transmission receiving device is performed and control the coil to transmit electric energy to the electricity transmission receiving device in an optimal magnetic field direction, where the optimal magnetic field direction refers to a corresponding magnetic field direction when a power value of electric energy actually received by the electricity transmission receiving device is maximum in a case of specific output power of the coil.
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Citations
8 Claims
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1. An energy transmitter for wirelessly transmitting electrical energy to an energy receiving device, the energy transmitter comprising:
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a coil comprising at least two mutually perpendicular subcoils, wherein the coil is configured to generate a magnetic field for transmitting electrical energy to the energy receiving device; a signal sending unit configured to receive a required power signal and an actually received power signal from the energy receiving device, wherein the required power signal includes information of an amount of power required by the energy receiving device and the actually received power signal includes information of power actually received by the energy receiving device; a controlling unit configured to (a) adjust an amplitude ratio and a phase difference between currents of the at least two mutually perpendicular subcoils in step-like changes towards a same direction at a fixed angle until a direction of the magnetic field returns to an initial position before the stepping; a sampling and comparing unit configured to (a) obtain and compare the actually received power signals before and after each stepping, and (b) determine the direction of the magnetic field corresponding to a maximum power value of the actually received power signals as an optimal direction of the magnetic field; and a power transmission unit configured to (a) control the coil to transmit the electrical energy to the energy receiving device in the optimal direction of the magnetic field and (b) adjust an output power so that the power received by the energy receiving device is equal to power represented by the required power signal. - View Dependent Claims (2, 3)
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4. An electricity transmission sending method comprising:
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receiving, by an energy transmitter, a required power signal and an actually received power signal that are from an energy receiving device, wherein the required power signal includes information of an amount of required power value of electrical energy required by the energy receiving device and the actually received power signal includes information of actually received power value; adjusting, by the energy transmitter, an amplitude ratio and a phase difference between currents of the at least two mutually perpendicular subcoils so as to cause a direction of an associated magnetic field to perform step change at a fixed angle; determining, an optimum direction of the associated magnetic field by; a) controlling the direction of the associated magnetic field to step at the fixed angle until the direction returns to a starting direction while obtaining actually received power signals at each step; b) selecting a largest value of the actually received power signals as a maximum power value; and c) identifying a direction of the associated magnetic field providing the maximum power value as the optimal direction; controlling, by the energy transmitter, the two subcoils to transmit electrical energy to the energy receiving device in the optimal magnetic field direction; and adjusting, by the energy transmitter, output power of the coil, so that the power received by the energy receiving device is substantially equal to the power required by the energy receiving device. - View Dependent Claims (5)
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6. An energy transmitter comprising:
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a communications module configured to receive a required power signal and an actually received power signal from an energy receiving device, wherein the required power signal includes information of an amount of required power value required by the energy receiving device and the received power signal that includes information of a received power value actually received by the energy receiving device; an optimal electricity transmission module configured to adjust an amplitude ratio and a phase difference between currents of the at least two mutually perpendicular subcoils so as to cause a direction of an associated magnetic field to perform step change at a fixed angle in order to determine an optimum direction of the associated magnetic field by; a) controlling the direction of the associated magnetic field to step at the fixed angle until the direction returns to a starting direction while obtaining actually received power signals at each step; b) selecting a largest value of the actually received power signals as a maximum power value; and c) identifying a direction of the associated magnetic field providing the maximum power value as the optimal direction; and an electric energy transmission module configured to control the two subcoils to transmit electrical energy to the energy receiving device in the optimal magnetic field direction and adjust output power of the coil so that the power received by the energy receiving device is substantially equal to the power required by the energy receiving device determined from the required power signal. - View Dependent Claims (7, 8)
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Specification