CN206533200U - A kind of dynamic adjustable wireless charging system of output voltage - Google Patents

Abstract

The utility model discloses a wireless charging system with dynamically adjustable output voltage. In the system, a logic control chip is controlled by a single-chip microcomputer in a control circuit at a receiving end, so that the feedback coefficient output by a resistor network with an adjustable voltage feedback coefficient is controlled to be adjustable. It is used for the dynamic adjustment circuit of the output voltage feedback coefficient, thereby realizing the adjustable output voltage. Utilizing the output voltage dynamically adjustable wireless charging system described in the embodiment of the present invention realizes the dynamic adjustment of the output voltage value of the wireless charging system solution, which not only makes the application more convenient, but also reduces the use cost and avoids the waste of resources.

Description

A wireless charging system with dynamically adjustable output voltage

technical field

The utility model relates to the technical field of wireless power supplies, in particular to a wireless charging system with dynamically adjustable output voltage.

Background technique

Most of the existing wireless charging system solutions have a fixed output voltage at the receiving end, and the output voltage of a small number of receiving end output voltage solutions can be adjusted by replacing the feedback system resistance device in production, and if it is a finished product The status output voltages are fixed and not adjustable. Therefore, the existing adjustable output voltage scheme of wireless power supply has the problems of constant use, waste of resources, and high cost, and this adjustable output voltage scheme of wireless power supply cannot meet the needs of customers. Adjust needs.

Therefore, there is an urgent need to provide a wireless charging system with dynamically adjustable output voltage to solve the problem of fixed output voltage value of the existing wireless charging system solution, resulting in constant use, waste of resources, high cost, and the inability to dynamically adjust the output voltage, etc. question.

Utility model content

The embodiment of the utility model provides a wireless charging system with dynamically adjustable output voltage, which is used to solve the problem of fixed output voltage value of the existing wireless charging system solution, resulting in constant use, waste of resources, high cost and inability to output voltage. The problem of dynamic regulation.

The embodiment of the utility model provides a dynamically adjustable output voltage wireless charging system, which is characterized in that it includes a wireless charging transmitting module and a wireless charging receiving module;

The wireless charging transmission module includes a transmission control circuit, a full-bridge DC/AC inverter circuit, a wireless charging transmission coil, a transmission coil voltage and current detection circuit, and a communication demodulation circuit, wherein the output terminal of the transmission control circuit is connected to the The input end of the full-bridge DC/AC inverter circuit is connected, the output end of the full-bridge DC/AC inverter circuit is connected to one end of the wireless charging transmitting coil, and the other end of the wireless charging transmitting coil is connected to the wireless charging transmitting coil. The input terminal of the transmitting coil voltage and current detection circuit is connected with the input terminal of the communication demodulation circuit, the output terminal of the transmission coil voltage and current detection circuit is connected with the input terminal of the transmission control circuit, and the communication solution The output terminal of the modulation circuit is connected with the input terminal of the emission control circuit;

The wireless charging receiving module is used to output a dynamically adjustable output voltage, including a receiving control circuit, a full-bridge AC/DC rectifier circuit, a wireless charging receiving coil, a communication modulation circuit, an output DC/DC circuit, and an output voltage and current detection circuit and an output voltage feedback coefficient dynamic adjustment circuit, wherein the receiving control circuit includes an MCU, one end of the wireless charging receiving coil is connected to the input end of the full-bridge AC/DC rectifier circuit, and the full-bridge AC/DC The output end of the rectification circuit is connected to the input end of the output DC/DC circuit, the output end of the output DC/DC circuit is connected to the input end of the output voltage and current detection circuit, and the output voltage feedback coefficient is dynamically The input end of the adjustment circuit is connected to the output end of the receiving control circuit, the output end is connected to the input end of the output voltage and current detection circuit, the output end of the output voltage and current detection circuit is connected to the receiving control circuit The input end is connected, the output end of the receiving control circuit is connected to the input end of the communication modulation circuit, and the output end of the communication modulation circuit is connected to the other end of the wireless charging receiving coil;

The output voltage feedback coefficient dynamic adjustment circuit includes a voltage feedback coefficient adjustable resistor network and a logic control chip, the input end of the logic control chip is connected to the output pin of the receiving control circuit MCU, and the output end is connected to the output pin of the voltage feedback coefficient The input terminals of the adjustable resistor network are connected.

Further, as an executable solution, in the wireless charging receiving module, the feedback coefficient output by the voltage feedback coefficient adjustable resistor network is used by the output voltage feedback coefficient dynamic adjustment circuit, so as to realize the adjustable output voltage Tune.

Further, as an executable solution, the voltage feedback coefficient adjustable resistor network includes at least three feedback resistors and at least three logic switches, and the number of the logic switches is equal to the number of the feedback resistors, and the feedback The resistors are connected in series, one end of the upper edge resistor is the voltage output end, there is a voltage feedback point between the two feedback resistors, and a connection line is drawn out to connect with the output voltage and current detection circuit, and the feedback resistor is connected to the The logic switch is connected in parallel, and the logic switch is used to control whether the feedback resistor connected in parallel with it is connected in series to the resistor network with adjustable voltage feedback coefficient, so as to control the number and resistance value of the feedback resistor connected, so as to realize The output voltage feedback coefficient is dynamically adjusted, thereby realizing the adjustable output voltage.

Further, as an executable solution, the data input terminal of the logic control chip is connected to the output pin of the receiving control circuit MCU, the clock input terminal is connected to another output pin of the receiving control circuit MCU, and the data output terminal It is connected with a logic switch, and is used to control the connection and disconnection of the logic switch, so as to control whether the feedback resistor is connected in series to the resistor network with adjustable voltage feedback coefficient.

Further, as an executable solution, the logic control chip is an MCU control chip.

Further, as an executable solution, the logic control chip is a decoder chip.

Further, as an executable solution, the logic control chip is a latch chip.

The beneficial effects of the utility model are as follows:

The embodiment of the utility model provides a wireless charging system with dynamically adjustable output voltage. In this system, the logic control chip is controlled by the single-chip microcomputer of the control circuit at the receiving end, so that the feedback coefficient output by the control voltage feedback coefficient adjustable resistor network can be adjusted. Adjustment for the dynamic adjustment circuit of the output voltage feedback coefficient, and then realize the adjustable output voltage. Utilizing the output voltage dynamically adjustable wireless charging system described in the embodiment of the present invention realizes the dynamic adjustment of the output voltage value of the wireless charging system solution, which not only makes the application more convenient, but also reduces the use cost and avoids the waste of resources.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic structural diagram of a wireless charging system with a dynamically adjustable output voltage according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of the output voltage feedback coefficient dynamic adjustment circuit described in the embodiment of the present invention;

FIG. 3 is a schematic diagram of the circuit connection structure described in the embodiment of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, rather than all implementations example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The embodiment of the utility model provides a wireless charging system with dynamically adjustable output voltage, as shown in Figure 1, which is a schematic structural diagram of the wireless charging system with dynamically adjustable output voltage in the embodiment of the utility model, including Module 11 and wireless charging receiving module 12;

The wireless charging transmitting module 11 includes a transmitting control circuit, a full-bridge DC/AC inverter circuit, a wireless charging transmitting coil, a transmitting coil voltage and current detection circuit, and a communication demodulation circuit, wherein the output terminal of the transmitting control circuit is connected to the The input end of the full-bridge DC/AC inverter circuit is connected, the output end of the full-bridge DC/AC inverter circuit is connected to one end of the wireless charging transmitting coil, and the other end of the wireless charging transmitting coil is connected to the The input end of the transmission coil voltage and current detection circuit is connected to the input end of the communication demodulation circuit, the output end of the transmission coil voltage and current detection circuit is connected to the input end of the transmission control circuit, and the communication The output terminal of the demodulation circuit is connected with the input terminal of the emission control circuit;

The wireless charging receiving module 12 is used to output a dynamically adjustable output voltage, including a receiving control circuit, a full-bridge AC/DC rectifier circuit, a wireless charging receiving coil, a communication modulation circuit, an output DC/DC circuit, and an output voltage and current detection circuit. circuit and an output voltage feedback coefficient dynamic adjustment circuit, wherein the receiving control circuit includes an MCU, one end of the wireless charging receiving coil is connected to the input end of the full-bridge AC/DC rectifier circuit, and the full-bridge AC/DC rectifier circuit The output terminal of the DC rectifier circuit is connected to the input terminal of the output DC/DC circuit, the output terminal of the output DC/DC circuit is connected to the input terminal of the output voltage and current detection circuit, and the output voltage feedback coefficient The input end of the dynamic adjustment circuit is connected to the output end of the receiving control circuit, the output end is connected to the input end of the output voltage and current detection circuit, and the output end of the output voltage and current detection circuit is connected to the receiving control circuit The input end of the receiving control circuit is connected to the input end of the communication modulation circuit, and the output end of the communication modulation circuit is connected to the other end of the wireless charging receiving coil;

Further, as shown in Figure 2, the output voltage feedback coefficient dynamic adjustment circuit includes a voltage feedback coefficient adjustable resistor network and a logic control chip, the input end of the logic control chip is connected to the output pin of the receiving control circuit MCU , the output terminal is connected to the input terminal of the voltage feedback coefficient adjustable resistor network.

Further, as an executable solution, in the wireless charging receiving module 12, the feedback coefficient output by the voltage feedback coefficient adjustable resistor network is used by the output voltage feedback coefficient dynamic adjustment circuit to realize the output voltage Adjustable size.

That is to say, the feedback coefficient output by the voltage feedback coefficient adjustable resistor network can be directly output to the output voltage and current detection circuit, and then the output voltage value can be adjusted by adjusting the voltage feedback coefficient.

Further, the voltage feedback coefficient adjustable resistor network includes at least three feedback resistors and at least three logic switches, and the number of the logic switches is equal to the number of the feedback resistors, and the feedback resistors are connected in series, One end of the upper edge resistance is the voltage output end, there is a voltage feedback point between the two feedback resistances, and a connection line is drawn out to connect with the output voltage and current detection circuit, the feedback resistance is connected in parallel with the logic switch, so The logic switch is used to control whether the feedback resistor connected in parallel is connected in series to the voltage feedback coefficient adjustable resistor network, so as to control the number of feedback resistors connected and the resistance value, so as to realize the dynamic adjustment of the output voltage feedback coefficient , and then the output voltage can be adjusted.

It should be noted that, in the resistor network with adjustable voltage feedback coefficient, the output voltage conduction formula is VOUT=VIN*(1+RF/RL), where VOUT is the output of the operational amplifier in the output voltage and current detection circuit Voltage, VIN is the input voltage of the operational amplifier in the output voltage and current detection circuit, RF and RL are feedback resistors, and the feedback coefficient β=1+RF/RL.

In order to more clearly illustrate the structure of the voltage feedback coefficient adjustable resistor network, as shown in Figure 3, the feedback resistor RF of the voltage feedback coefficient adjustable resistor network is composed of a plurality of independent resistors connected in series, and each independent resistor There is a logic switch in parallel, which is used to control whether the independent resistors are connected in series to the adjustable voltage feedback coefficient resistor network, so as to control the number of feedback resistors RF connected to the independent resistors, thereby controlling the number of feedback resistors RF. Similarly, the feedback resistance RL of the voltage feedback coefficient adjustable resistance network is composed of multiple independent resistances in series, and each independent resistance has a logic switch in parallel to control whether the independent resistances are connected in series into the voltage feedback coefficient adjustable resistor network to control the number of independent resistors connected to the feedback resistor RL, thereby controlling the resistance value of the feedback resistor RL. It should be noted that RF and RL are represented by four The series connection of independent resistors is taken as an example for illustration, but the number of independent resistors is not limited.

Further, as an executable solution, the data input terminal of the logic control chip is connected to the output pin of the receiving control circuit MCU, the clock input terminal is connected to another output pin of the receiving control circuit MCU, and the data output terminal It is connected with a logic switch, and is used to control the connection and disconnection of the logic switch, so as to control whether the feedback resistor is connected in series to the resistor network with adjustable voltage feedback coefficient.

Preferably, as an executable solution, the logic control chip is an MCU control chip.

Further, as an executable solution, the logic control chip is a decoder chip.

Furthermore, as an executable solution, the logic control chip is a latch chip.

Taking the serial-to-parallel shift latch as an example, the adjustable feedback coefficient of the output voltage feedback coefficient dynamic adjustment circuit will be described below. The circuit connection structure is shown in FIG. 3 .

In Fig. 3, the logic control chip can be controlled by the microcontroller receiving the control circuit, that is, the feedback resistor RF of the voltage feedback coefficient adjustable resistor network can be controlled by controlling the I/O port of the serial conversion and shift latch. The logic switch connected in parallel controls the resistance value of the feedback resistor RF, and then adjusts the feedback coefficient of the voltage feedback coefficient adjustable resistor network, so as to realize the dynamic adjustment of the output voltage of the wireless charging system.

It should be noted that, taking the resistors in Figure 3 as an example, the independent resistors that make up the resistor RF can be assigned as R, 2R, 3R, and 4R, and the resistor RL is the same. The value range of the feedback coefficient of the voltage feedback coefficient adjustable resistor network is also relatively large, which makes the application more convenient.

It should be noted that the receiving control circuit in the wireless charging receiving module 12 is equipped with an I2C communication interface, and the load connected to the wireless charging receiving module 12 can transmit the output voltage value to the wireless charging receiving module 12 through the I2C communication interface. The demand control parameters can then adjust the required voltage value output by the wireless charging receiving module 12 according to the change of the load, so as to achieve high efficiency and energy saving of power supply.

The embodiment of the utility model provides a wireless charging system with dynamically adjustable output voltage. In this system, the logic control chip is controlled by the single-chip microcomputer of the control circuit at the receiving end, so that the feedback coefficient output by the control voltage feedback coefficient adjustable resistor network can be adjusted. Adjustment for the dynamic adjustment circuit of the output voltage feedback coefficient, and then realize the adjustable output voltage. Utilizing the output voltage dynamically adjustable wireless charging system described in the embodiment of the present invention realizes the dynamic adjustment of the output voltage value of the wireless charging system solution, which not only makes the application more convenient, but also reduces the use cost and avoids the waste of resources.

While preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be interpreted to cover the preferred embodiment and all changes and modifications which fall within the scope of the present invention.

Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and equivalent technologies thereof, the utility model is also intended to include these modifications and variations.

Claims (7)

1. a kind of dynamic adjustable wireless charging system of output voltage, it is characterised in that including wireless charging transmitter module and wireless Charge receiving module；

The wireless charging transmitter module include countdown circuit, full-bridge DC/AC inverter circuits, wireless charging transmitting coil, Transmitting coil voltage and current detection circuit and communication demodulator circuit, wherein, the output end of the countdown circuit with it is described complete The input of bridge DC/AC inverter circuits is connected, and output end and the wireless charging of the full-bridge DC/AC inverter circuits are launched One end of coil is connected, the other end of the wireless charging transmitting coil and the transmitting coil voltage and current detection circuit Input, the input of the communication demodulator circuit are connected, the output end of the transmitting coil voltage and current detection circuit with The input of the countdown circuit is connected, and the output end for communicating demodulator circuit is defeated with the countdown circuit Enter end to be connected；

The wireless charging receiving module, for export can dynamic regulation output voltage, including receive control circuit, full-bridge AC/DC rectification circuits, wireless charging receiving coil, communication modulation circuit, output DC/DC circuits, output voltage current detecting electricity Road and output voltage feedback factor dynamic regulating circuit, wherein, the control circuit that receives includes MCU, and the wireless charging connects One end of take-up circle is connected with the input of the full-bridge AC/DC rectification circuits, the output of the full-bridge AC/DC rectification circuits End is connected with the input of the output DC/DC circuits, output end and the output voltage electricity of the output DC/DC circuits The input of current detection circuit is connected, and the input of the output voltage feedback factor dynamic regulating circuit is controlled with described receive The output end of circuit processed is connected, and output end is connected with the input of the output voltage current detection circuit, the output The output end of voltage and current detection circuit is connected with the input for receiving control circuit, described to receive the defeated of control circuit The input for going out end with the communication modulation circuit is connected, and the output end of the communication modulation circuit connects with the wireless charging The other end of take-up circle is connected；

The output voltage feedback factor dynamic regulating circuit includes voltage feedback factor adjustable resistance network and logic control core Piece, the input of the logic control chip is connected with receiving control circuit MCU output pin, output end and the voltage The input of feedback factor adjustable resistance network is connected.

2. the system as claimed in claim 1, it is characterised in that

In the wireless charging receiving module, the feedback factor of the voltage feedback factor adjustable resistance network output is with for institute State output voltage feedback factor dynamic regulating circuit to use, to realize that output voltage size is adjustable.

3. system as claimed in claim 2, it is characterised in that

The voltage feedback factor adjustable resistance network includes at least three feedback resistances and at least three logic switches, and institute State logic switch number equal with the feedback resistance number, be connected in series between the feedback resistance, the one of top edge resistance Hold as voltage output end, have a Voltage Feedback point between two feedback resistances, and draw a connecting line and the output voltage Current detection circuit is connected, and the feedback resistance is connected in parallel with the logic switch, the logic switch be used for control with Whether its described feedback resistance in parallel, which connects, is linked into the voltage feedback factor adjustable resistance network, to control feedback electricity Resistance access number and resistance size, so as to realize output voltage feedback factor dynamic regulation, and then realize the big I of output voltage Adjust.

4. system as claimed in claim 3, it is characterised in that

The data input pin of the logic control chip is connected with receiving control circuit MCU output pin, input end of clock It is connected with another output pin for receiving control circuit MCU, data output end is connected with logic switch, it is described for controlling Logic switch is connected and disconnected from, to realize the control feedback resistance whether connecting to be linked into the voltage feedback factor adjustable In resistor network.

5. system as claimed in claim 4, it is characterised in that the logic control chip is MCU control chips.

6. system as claimed in claim 4, it is characterised in that the logic control chip is decoder chip.

7. system as claimed in claim 4, it is characterised in that the logic control chip is latch chip.