Magnetic resonance wireless charging system

Abstract

The invention discloses a wireless charging system adopting an LCC-LCC or LCC-S magnetic field resonance mode, a transmitting end fixedly works at a set frequency, and the current and magnetic field intensity of a transmitting coil are changed by adjusting a direct current input voltage. No voltage stabilizing circuit is arranged behind the rectifying circuit of the receiving end, and power is directly supplied to a battery or a load. According to the system, a capacitor is formed by electrode plates arranged at a transmitting end and a receiving end, one-way electric field communication is carried out by setting frequency carrier waves, power control signals and high-speed data signals of the receiving end are transmitted, microsecond-level power adjustment is achieved, the receiving end can still stably output voltage or current under the condition that no voltage stabilization exists, and the system is simple in structure and convenient to use. The size, the cost and the heating are reduced; and the efficiency is improved.

Description

Technical Field

[0001] This invention relates to a wireless charging device, and more specifically to a magnetic resonance wireless charging system. Background Technology

[0002] Existing LCC-LCC magnetic field resonant wireless charging systems typically use radio frequency (RF) communication for power control and data transmission between the transmitter and receiver. However, RF communication modules are bulky and have limited interference immunity, and the receiver usually requires additional voltage regulation circuitry to maintain a stable output voltage or current, resulting in increased system size, higher costs, increased heat generation, and reduced overall efficiency.

[0003] In some applications, the receiver has limited space and requires high-precision, low-latency power control and data transmission methods to meet the demands for rapid response and stability in power supply to the load. Current technologies cannot simultaneously address the needs for space constraints, rapid power control, and high-speed data transmission. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-efficiency wireless charging system based on an LCC-LCC or LCC-S magnetic field resonance structure combined with electric field communication.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a magnetic resonance wireless charging system, including a transmitter component and a receiver component;

[0006] The transmitter assembly includes an AC-DC converter connected to a power supply, a transmitter central processing unit (MCU), and an inverter. The transmitter MCU is connected to the AC-DC converter and the inverter via wires. The inverter is equipped with an electric field communication feedback circuit module. The transmitter MCU is connected to the electric field communication feedback circuit module via power control signal lines and data signal lines. The electric field communication feedback circuit module is connected to the feedback electrode plate via wires.

[0007] The inverter is connected to the LCC-LCC or LCC-S transmitter matching circuit module via wires, and the LCC-LCC or LCC-S transmitter matching circuit module is connected to the wireless charging transmitter coil via wires.

[0008] The transmitter component adjusts the DC input voltage via an AC-DC converter to change the current and magnetic field strength of the wireless charging transmitter coil;

[0009] The receiver component includes a wireless charging receiving coil, which is connected to an LCC-LCC or LCC-S receiver matching circuit module via a wire. The LCC-LCC or LCC-S receiver matching circuit module is connected to a rectifier via a wire. The rectifier contains an electric field communication feedback circuit module, which is connected to a voltage-current comparator via a power control signal line. The electric field communication feedback circuit module is also connected to the receiver's central processing unit (MCU) via a data signal line. Finally, the electric field communication feedback circuit module is connected to a feedback electrode plate via a wire.

[0010] The rectifier is connected to the voltage and current comparator via wires, and the voltage and current comparator is connected to the battery or load via wires. The receiving end central processing unit (MCU) is also connected to the voltage and current comparator via wires. The voltage and current comparator has a voltage comparison module and a current comparison module. The voltage comparison module or the current comparison module can be selected as needed and output high and low level signals to indicate the demand for increased or decreased power, respectively.

[0011] A capacitor is formed between the feedback electrode and the return electrode; the feedback electrode and the return electrode communicate unidirectionally via a set frequency carrier wave from the receiving component to the transmitting component.

[0012] As a preferred embodiment, a capacitance of 1pF or more is formed between the feedback electrode and the return electrode.

[0013] As a preferred embodiment, the wireless charging transmitting coil operates at a fixed frequency of 85kHz.

[0014] As a preferred embodiment, the high and low level thresholds of the voltage-current comparator are set by the receiving end central processing unit (MCU).

[0015] As a preferred embodiment, the resolution and response speed of the wireless charging transmitting coil are set according to the load characteristics to ultimately achieve a stable output voltage or current at the receiving end.

[0016] As a preferred embodiment, the electric field communication feedback circuit module includes a feedback mixer and an amplifier to mix and amplify the data signal sent by the receiving end central processing unit MCU and the power control signal sent by the voltage-current comparator before transmitting it to the feedback electrode plate; the transmitting electrode plate transmits the signal to the feedback electrode plate through capacitive coupling.

[0017] The electric field communication backhaul circuit module includes a preamplifier, a bandpass filter, and a backhaul mixer to input the signal received by the backhaul electrode to the transmitter's central processing unit (MCU).

[0018] As a preferred embodiment, the electric field communication backhaul circuit module is equipped with a high-impedance signal receiving / decoding circuit. The high-impedance signal receiving / decoding circuit separates the power control signal and data signal from the signal returned by the backhaul electrode and transmits them to the transmitter's central processing unit (MCU) to perform microsecond-level power adjustment on the wireless charging transmitter coil.

[0019] The beneficial effects of this invention are:

[0020] This system uses electrode plates set at the transmitting and receiving ends to form a capacitor. The electrode plates communicate with each other via a set frequency carrier wave in a one-way electric field, transmitting the power control signal and high-speed data signal from the receiving end. It has anti-interference and high-speed data transmission capabilities, realizes microsecond-level power adjustment, adapts to dynamic load requirements, and enables the receiving end to output stable voltage or current even without voltage regulation. It reduces the overall size of the system, manufacturing cost and heat generation of the equipment, and improves charging efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the magnetic resonance wireless charging system.

[0022] Figure 2 This is an example of the modulation signal for the receiving end electric field communication feedback circuit module. Detailed Implementation

[0023] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0024] like Figure 1-2 As shown, the magnetic resonance wireless charging system includes a transmitter component and a receiver component;

[0025] The transmitter assembly includes an AC-DC converter connected to a power supply, a transmitter central processing unit (MCU), and an inverter. The transmitter MCU is connected to the AC-DC converter and the inverter via wires. The inverter is equipped with an electric field communication feedback circuit module. The transmitter MCU is connected to the electric field communication feedback circuit module via power control signal lines and data signal lines. The electric field communication feedback circuit module is connected to the feedback electrode plate via wires.

[0026] The inverter is connected to the LCC-LCC or LCC-S transmitter matching circuit module via wires, and the LCC-LCC or LCC-S transmitter matching circuit module is connected to the wireless charging transmitter coil via wires; the wireless charging transmitter coil operates at a fixed frequency of 85kHz.

[0027] The transmitter component adjusts the DC input voltage via an AC-DC converter to change the current and magnetic field strength of the wireless charging transmitter coil;

[0028] The receiver component includes a wireless charging receiving coil, which is connected to an LCC-LCC or LCC-S receiver matching circuit module via a wire. The LCC-LCC or LCC-S receiver matching circuit module is connected to a rectifier via a wire. The rectifier contains an electric field communication feedback circuit module, which is connected to a voltage-current comparator via a power control signal line and to the receiver's central processing unit (MCU) via a data signal line. The electric field communication feedback circuit module is also connected to a feedback electrode plate via a wire. A capacitance of 1pF or more is formed between the feedback electrode plate and the return electrode plate. Unidirectional electric field communication between the feedback electrode plate and the return electrode plate is performed from the receiver component side to the transmitter component side using a carrier wave at a set frequency (13.56MHz).

[0029] The rectifier is connected to the voltage-current comparator via wires, and the voltage-current comparator is connected to the battery or load via wires. The receiving end's central processing unit (MCU) is also connected to the voltage-current comparator via wires. The high and low level thresholds of the voltage-current comparator are set by the receiving end's MCU. The voltage-current comparator contains a voltage comparison module and a current comparison module. The appropriate module can be selected to output high or low level signals to indicate an increase or decrease in power, respectively.

[0030] The resolution and response speed of the wireless charging transmitting coil are adjusted according to the load characteristics to ultimately achieve a stable output voltage or current at the receiving end.

[0031] The electric field communication feedback circuit module includes a feedback mixer and an amplifier to mix and amplify the data signal sent by the receiving end central processing unit MCU and the power control signal (amplitude modulation signal and frequency modulation signal) sent by the voltage and current comparator and then transmit it to the feedback electrode plate; the transmitting electrode plate transmits the signal to the feedback electrode plate through capacitive coupling.

[0032] The electric field communication backhaul circuit module includes a preamplifier, a bandpass filter, and a backhaul mixer to input the signal received by the backhaul electrode to the transmitter's central processing unit (MCU).

[0033] The electric field communication backhaul circuit module is equipped with a high-impedance signal receiving / decoding circuit (input impedance greater than 100kΩ). The high-impedance signal receiving / decoding circuit separates the power control signal and data signal in the signal returned by the backhaul electrode and transmits them to the transmitter's central processing unit (MCU) to perform microsecond-level power adjustment on the wireless charging transmitter coil.

[0034] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some examples of its application, and are not intended to limit the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.

Claims

1. A magnetic resonance wireless charging system, comprising a transmitter assembly and a receiver assembly; The transmitter assembly includes an AC-DC converter connected to a power supply, a transmitter central processing unit (MCU), and an inverter. The transmitter MCU is connected to the AC-DC converter and the inverter via wires. Its key feature is: The inverter is equipped with an electric field communication feedback circuit module. The transmitter's central processing unit (MCU) is connected to the electric field communication feedback circuit module through power control signal lines and data signal lines. The electric field communication feedback circuit module is connected to the feedback electrode plate through wires. The inverter is connected to the LCC-LCC or LCC-S transmitter matching circuit module via wires, and the LCC-LCC or LCC-S transmitter matching circuit module is connected to the wireless charging transmitter coil via wires. The transmitter component adjusts the DC input voltage via an AC-DC converter to change the current and magnetic field strength of the wireless charging transmitter coil; The receiver component includes a wireless charging receiving coil, which is connected to an LCC-LCC or LCC-S receiver matching circuit module via a wire. The LCC-LCC or LCC-S receiver matching circuit module is connected to a rectifier via a wire. The rectifier contains an electric field communication feedback circuit module, which is connected to a voltage-current comparator via a power control signal line. The electric field communication feedback circuit module is also connected to the receiver's central processing unit (MCU) via a data signal line. Finally, the electric field communication feedback circuit module is connected to a feedback electrode plate via a wire. The rectifier is connected to the voltage and current comparator via wires, and the voltage and current comparator is connected to the battery or load via wires. The receiving end central processing unit (MCU) is also connected to the voltage and current comparator via wires. The voltage and current comparator has a voltage comparison module and a current comparison module. The voltage comparison module or the current comparison module can be selected as needed and output high and low level signals to indicate the demand for increased or decreased power, respectively. A capacitor is formed between the feedback electrode and the return electrode; the feedback electrode and the return electrode communicate unidirectionally via a set frequency carrier wave from the receiving component to the transmitting component.

2. The magnetic resonance wireless charging system as described in claim 1, characterized in that: A capacitance of 1pF or more is formed between the feedback electrode and the return electrode.

3. The magnetic resonance wireless charging system as described in claim 1, characterized in that: The wireless charging transmitting coil operates at a fixed frequency of 85kHz.

4. The magnetic resonance wireless charging system as described in claim 1, characterized in that: The high and low level thresholds of the voltage-current comparator are set by the receiving end central processing unit (MCU).

5. The magnetic resonance wireless charging system as described in claim 1, characterized in that: The resolution and response speed of the wireless charging transmitting coil are adjusted according to the load characteristics to ultimately achieve a stable output voltage or current at the receiving end.

6. The magnetic resonance wireless charging system as described in claim 1, characterized in that: The electric field communication feedback circuit module includes a feedback mixer and an amplifier to mix and amplify the data signal sent by the receiving end central processing unit MCU and the power control signal sent by the voltage and current comparator, and then transmit them to the feedback electrode plate; the transmitting electrode plate transmits the signal to the feedback electrode plate through capacitive coupling. The electric field communication backhaul circuit module includes a preamplifier, a bandpass filter, and a backhaul mixer to input the signal received by the backhaul electrode to the transmitter's central processing unit (MCU).

7. The magnetic resonance wireless charging system as described in claim 1, characterized in that: The electric field communication backhaul circuit module is equipped with a high-impedance signal receiving / decoding circuit. The high-impedance signal receiving / decoding circuit separates the power control signal and data signal in the signal returned by the backhaul electrode and transmits them to the transmitter's central processing unit (MCU) to perform microsecond-level power adjustment on the wireless charging transmitter coil.

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