CN210225035U - Wireless charging circuit and wireless charging system based on magnetic coupling resonance - Google Patents
Wireless charging circuit and wireless charging system based on magnetic coupling resonance Download PDFInfo
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- CN210225035U CN210225035U CN201921321200.1U CN201921321200U CN210225035U CN 210225035 U CN210225035 U CN 210225035U CN 201921321200 U CN201921321200 U CN 201921321200U CN 210225035 U CN210225035 U CN 210225035U
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Abstract
The utility model belongs to the technical field of charge, this application embodiment provides a wireless charging circuit and wireless charging system based on magnetic coupling resonance will through rectifier module AC signal that AC power supply provided converts the first DC voltage signal that corresponds into, and drive module is based on the corresponding drive signal of control signal output that control module provided, then based on through conversion module drive signal will first DC voltage signal converts alternating current signal into to charge to the consumer in presetting the distance, solved service robot "counterpoint difficult", traditional wireless charging mode in wired charging process have high energy consumption, low efficiency scheduling problem.
Description
Technical Field
The utility model relates to a technical field that charges especially relates to a wireless charging circuit and wireless charging system based on magnetic coupling resonance.
Background
The service robot is operated by remote control equipment or set program and its equipment, and can automatically work under the condition of no control by man to implement simple service or guide operation. In recent years, with the rapid development of the artificial intelligence industry and the rapid breakthrough of the related technologies, the intelligent robot industry starts to develop vigorously, and has high application value in the fields of civil maintenance, repair, transportation, cleaning, security, rescue, monitoring and the like, and the prospect of the intelligent robot industry is unlimited.
However, while the service robot saves the labor cost, the endurance problem of the service robot also becomes a key problem restricting the continuous working capability of the service robot. In order to solve the endurance problem of the service robot, a lithium battery in the service robot is generally charged by a battery recharging method.
However, the service robot has the problem of difficult alignment in the wired charging process, and the traditional wireless charging mode has the problems of high energy consumption, low efficiency and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a wireless charging circuit and wireless charging system based on magnetic coupling resonance aims at solving foretell at least one technical problem.
In order to solve the above technical problem, the present application provides a wireless charging circuit based on magnetic coupling resonance, the wireless charging circuit is connected with an ac power supply and a feedback signal source, and the wireless charging circuit includes:
the rectification module is connected with the alternating current power supply and used for converting an alternating current signal provided by the alternating current power supply into a corresponding first direct current voltage signal;
the control module is connected with the feedback signal source and used for receiving the feedback signal provided by the feedback signal source and generating a corresponding control signal based on the feedback signal source;
the driving module is connected with the control module and used for receiving the control signal and outputting a corresponding driving signal based on the control signal; and
and the conversion module is connected with the rectifying module and used for receiving a driving signal and a first direct-current voltage signal, and converting the first direct-current voltage signal into an alternating-current signal based on the driving signal so as to wirelessly charge the electric equipment within a preset distance.
Optionally, the control module includes:
the amplitude limiting unit is connected with the feedback signal source and used for receiving a feedback signal provided by the feedback signal source and limiting the feedback signal within a preset voltage range;
and the zero-crossing detection unit is connected with the amplitude limiting unit and used for receiving the feedback signal and converting the alternating-current sine wave of the feedback signal into an alternating-current square wave with the same frequency as the alternating-current sine wave.
The present application further provides a wireless charging system based on magnetic coupling resonance, including:
the robot is internally provided with a receiving module and a power supply storage module;
an AC power supply port;
a feedback signal source port; and
the wireless charging circuit according to any one of the preceding claims, wherein the wireless charging circuit is connected to the ac power port and the feedback signal source port, respectively;
when the receiving module is located within the preset distance of the wireless charging circuit, an inductance coil inside the receiving module and an inductance coil inside the conversion module are mutually inductive, so that the alternating current signal provided by the conversion module is converted into a corresponding second direct current voltage signal, and the second direct current voltage signal is used for charging the power storage module.
In the wireless charging circuit and wireless charging system based on magnetic coupling resonance that this application provided, will through rectifier module alternating current signal conversion that alternating current power supply provided is corresponding first direct current voltage signal, and drive module is based on the corresponding drive signal of control signal output that control module provided, then based on through conversion module drive signal will first direct current voltage signal conversion is alternating current signal to charge to the consumer in predetermineeing the distance, solved service robot and had high energy consumption, inefficiency scheduling problem in wired charging process "counterpoint difficult", traditional wireless charging mode.
Drawings
Fig. 1 is a schematic circuit structure diagram of a wireless charging circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a control module according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a driving module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a conversion module according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a rectifier module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a wireless charging system according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a receiving module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Battery recharging is currently largely divided into two forms, wired charging and wireless charging. The wired charging mode is to control the service robot to be connected with a charging connector to further realize charging, the step needs to be accurately aligned, the current technology depends on accurate control of the service robot carrying a sensor, and the current technology has a certain error rate. The wireless charging mode in the application only needs to serve that the robot runs to a charging area, and the requirement on accuracy is not high.
In the wireless charging circuit and the wireless charging system based on magnetic coupling resonance provided by an embodiment of the application, efficient and rapid charging by a constant-current-constant-voltage method is realized through series-series resonance topological control. This charging system adopts wireless charging mode, compares with wired charging mode, and the precision requirement that berths the counterpoint to the robot is not high, need not solve "accurate counterpoint" problem, and is further, through the optimization to wireless charging mode in this embodiment, lets this system stability better, and the energy consumption of charging is lower, and is fast, realizes that the service robot electric energy exhausts the back and charges by oneself fast, as early as possible the purpose of going on the line.
Fig. 1 is a schematic block diagram of a wireless charging circuit based on magnetic coupling resonance according to an embodiment of the present application, where the wireless charging circuit is connected to an ac power source 11 and a feedback signal source 12, and the wireless charging circuit includes: a rectifier module 21 connected to the ac power supply 11 for converting an ac signal provided by the ac power supply 11 into a corresponding first dc voltage signal; the control module 22 is connected to the feedback signal source 12, and configured to receive the feedback signal provided by the feedback signal source 12 and generate a corresponding control signal based on the feedback signal source 12; the driving module 23 is connected to the control module 22, and configured to receive the control signal and output a corresponding driving signal based on the control signal; and a conversion module 24 connected to the rectification module 21 and the driving module 23, and configured to receive the driving signal and the first direct-current voltage signal, and convert the first direct-current voltage signal into an alternating-current signal based on the driving signal, so as to charge the electric device within a preset distance.
In this embodiment, rectifier module 21, control module 22, drive module 23 and conversion module 24 all set up in charging platform, will through rectifier module 21 alternating current signal that alternating current power supply 11 provided converts into corresponding first direct current voltage signal, and drive module 23 outputs corresponding drive signal based on the control signal that control module 22 provided, then based on through conversion module 24 drive signal will first direct current voltage signal converts into alternating current signal to charge to the consumer in presetting the distance, solved service robot "difficult counterpoint" in wired charging process, traditional wireless charging mode has high energy consumption, inefficiency scheduling problem.
In one embodiment, the conversion module 24 converts the first direct current voltage signal into a constant frequency alternating current signal based on the driving signal.
In one embodiment, the fixed-frequency ac signal generated by the converting module 24 forms an LC resonant circuit with a corresponding resonant capacitor through a transmitting coil, the receiving coil in the receiving module in the electric device forms another LC resonant circuit with the corresponding resonant capacitor, and magnetic field coupling resonance exists between the transmitting coil and the receiving coil in the two LC resonant circuits, so as to generate a high-frequency alternating magnetic field, and further generate an induced current in the receiving coil, thereby realizing wireless transmission of energy.
In one embodiment, the powered device may be a service robot.
In one embodiment, the feedback signal source 12 is configured to detect the conversion module 24, provide a feedback signal to the control module 22 based on the detection result, for example, by detecting a current of an inductor in the conversion module 24, determine whether the current is within an operating current range, send a corresponding feedback signal based on the determination result, and the control module 22 outputs a corresponding control signal based on the feedback signal.
For example, if the current of the inductor in the conversion module 24 is in the working range, the feedback signal is normal, the control signal output by the control module 22 is not changed, if the current of the inductor in the conversion module 24 is relatively low, that is, smaller than the lower limit value of the working current range, a corresponding feedback signal is output, the control module 22 outputs a control signal for boosting the inductor based on the feedback signal, the driving module 23 drives the conversion module 24 to output an ac signal with a higher current based on the control signal, further, the feedback signal source 12 may be further configured to detect the voltage of the inductor output by the conversion module 24 and determine whether the working voltage is in the working voltage range, if the voltage of the inductor in the conversion module 24 is relatively high, that is, the voltage is larger than the upper limit value of the working voltage range, a corresponding feedback signal is output, the control module 22 outputs a control signal for reducing the voltage of the inductor based on the feedback signal, the driving module 23 drives the converting module 24 to lower the operating voltage on the inductor based on the control signal.
In one embodiment, referring to fig. 2, the control module 22 includes: the amplitude limiting unit 221 is connected to the feedback signal source 12, and configured to receive a feedback signal provided by the feedback signal source 12 and limit the feedback signal within a preset voltage range; and a zero-crossing detection unit 222, connected to the amplitude limiting unit 221, for receiving the feedback signal and converting an ac sine wave of the feedback signal into an ac square wave having the same frequency as the ac sine wave.
In the present embodiment, the amplitude limiting unit 221 limits the feedback signal within a preset voltage range, for example, in one embodiment, the feedback signal source 12 provides an ac signal with high voltage, low current and the same frequency as the resonant frequency of the coil in the converting module 24, the ac signal is limited to about 5V by the amplitude limiting unit 221, and then the ac sine wave of the feedback signal is converted into an ac square wave with the same frequency as the ac square wave by the zero-crossing detecting unit 222.
Furthermore, a plurality of amplitude limiting units 221 are disposed in the control module 22, for example, a signal attenuation unit is disposed in two amplitude limiting units 221, and amplitude limiting processing is performed again after the ac signal is subjected to signal attenuation, so that the amplitude limiting effect of the ac signal is improved, and damage to the back end circuit is avoided.
In one embodiment, a signal attenuation unit may be formed by connecting a coupling capacitor and a resistor in series.
In one embodiment, the control module 22 is a core of the wireless charging system, and can implement automatic control of the wireless charging system based on a series of logic controllers.
In one embodiment, referring to fig. 2, the clipping unit 221 includes: a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4; an anode of the first diode D1 and an anode of the third diode D3 are commonly connected to the feedback signal source 12, a cathode of the first diode D1 and an anode of the second diode D2 are connected, a cathode of the third diode D3 and a cathode of the fourth diode D4, and an anode of the second diode D2 and an anode of the fourth diode D4 are commonly connected to the ground.
In the present embodiment, the third diode D3 and the fourth diode D4 are connected in series in an inverted manner, so that the input ac signal with high voltage, low current and the same frequency as the coil resonant frequency can be limited within a preset voltage range.
In one embodiment, the second diode D2 and the third diode D3 are both zener diodes.
In one embodiment, referring to fig. 2, the zero crossing detection unit 222 includes: a first capacitor C1, a first resistor R1, a fifth diode D5, a sixth diode D6, a Schmitt trigger chip U22 and a first working power supply terminal 220; a first end of the first capacitor C1 is connected to the limiter unit 221, a second end of the first capacitor C1 is connected to the first resistor R1, a second end of the first resistor R1, an anode of the fifth diode D5, an anode of the sixth diode D6, and an input end of the schmitt trigger chip U22 are commonly connected, a cathode of the fifth diode D5 and a power supply end of the schmitt trigger chip U22 are commonly connected to the first operating power supply end 220, and an anode of the sixth diode D6 and a ground end of the schmitt trigger are commonly connected to ground.
In this embodiment, the first capacitor C1 and the first resistor R1 are connected in series to form a signal attenuation unit to attenuate the input ac signal, the fifth diode D5 and the sixth diode D6 form a clipping unit 221 to further clip the ac signal, and then the ac sine wave is converted into an ac square wave with the same frequency by a schmitt trigger.
In one embodiment, the schmitt trigger chip U22 is model 74HC 14.
In one embodiment, referring to fig. 3, the driving module 23 includes: a current amplification chip U1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, a fourth switch tube Q4, a seventh diode D7, an eighth diode D8, a second working power supply terminal 301, a third working power supply terminal 302 and a gate drive transformer GDT; a first input terminal of the current amplification chip U1 is connected to the control module 22, a first enable signal terminal of the current amplification chip U1, a second enable signal terminal of the current amplification chip U1, a power terminal of the current amplification chip U1, and a second capacitor C2 are commonly connected to the second operating power terminal 301, a second terminal of the second capacitor C2 is grounded, a second input terminal of the current amplification chip U1 is connected to a ground terminal of the current amplification chip U1, a first output terminal of the current amplification chip U1, a first terminal of the third capacitor C3, and a control terminal of the second switching tube Q2 are connected, a second terminal of the third capacitor C3, an anode of the seventh diode D7, a first terminal of the second resistor R2 are commonly connected to the control terminal of the first switching tube Q1, a cathode of the seventh diode D7, a second terminal of the second resistor R2, and a second terminal of the fourth capacitor C4 are commonly connected to the second operating power terminal 302, a second end of the fourth capacitor C4 is grounded, a current output end of the second switch tube Q2 is grounded, a current output end of the first switch tube Q1, a current input end of the second switch tube Q2, a first end of the seventh capacitor C7, a first end of the eighth capacitor C8, a first end of the fourth resistor R4 and a first end of the fifth resistor R5 are commonly connected, a second end of the seventh capacitor C7, a second end of the eighth capacitor C8, a second end of the fourth resistor R4 and a second end of the fifth resistor R5 are commonly connected to the gate drive transformer GDT, a second output end of the current amplification chip U1 and a first end of the fifth capacitor C5 are commonly connected to a control end of the fourth switch tube Q4, a current output end of the fourth switch tube Q4 is grounded, a second end of the fifth capacitor C5, an anode D8 of the eighth diode D3 and a first end of the third resistor R3 are commonly connected to the control end of the third switch tube Q3, a cathode of the eighth diode D8, a second terminal of the third resistor R3, a current input terminal of the third switching tube Q3, and a first terminal of the sixth capacitor C6 are commonly connected to the third operating power source terminal 302, a second terminal of the sixth capacitor C6, a current output terminal of the third switching tube Q3, and a current input terminal of the fourth switching tube Q4 are commonly connected to the gate driving transformer GDT.
In this embodiment, the driving module 23 is used as an intermediate link between the control module 22 and the converting module 24, and is configured to amplify the control signal output by the control module 22, so that the control signal has a sufficiently large power to drive the switching tube in the converting module 24 to operate, specifically, the driving module 23 in this embodiment is driven by using a current amplifying chip U1 externally connected to a totem pole, as shown in fig. 3.
In this embodiment, two output terminals of the gate driving transformer GDT are respectively connected to two gate input terminals in the converting module 24 in a one-to-one correspondence. If the output current of the current amplification chip U1 in the driving module 23 is directly connected to the gate of the conversion module 24, a full-bridge short circuit will be caused, and in this embodiment, the gate driving transformer GDT is used to isolate the circuit.
In one embodiment, the current amplification chip U1 is model UCC 27423.
In one embodiment, the first switch transistor Q1 and the third switch transistor Q3 are P-type MOS transistors, and the second switch transistor Q2 and the fourth switch transistor Q4 are N-type MOS transistors. Specifically, the sources of the P-type MOS transistors serve as current input terminals of the first switching transistor Q1 and the third switching transistor Q3, the sources of the P-type MOS transistors serve as current output terminals of the first switching transistor Q1 and the third switching transistor Q3, and the gates of the P-type MOS transistors serve as control terminals of the first switching transistor Q1 and the third switching transistor Q3. The source electrode of the N-type MOS transistor serves as the current output end of the second switching transistor Q2 and the fourth switching transistor Q4, the drain electrode of the N-type MOS transistor serves as the current input end of the second switching transistor Q2 and the fourth switching transistor Q4, and the gate electrode of the N-type MOS transistor serves as the control end of the second switching transistor Q2 and the fourth switching transistor Q4.
In one embodiment, referring to fig. 4, the conversion module 24 includes: a ninth capacitor C9, a fifth switch tube Q5, a sixth switch tube Q6, a seventh switch tube Q7, an eighth switch tube Q8, a sixth resistor R6 and a first inductor L1; a first end of the ninth capacitor C9, a current input end of the fifth switch tube Q5 and a current input end of the sixth switch tube Q6 are commonly connected to the rectifier module 21, a control end of the fifth switch tube Q5 and a control end of the eighth switch tube Q8 are commonly connected to the driving module 23, a control end of the sixth switch tube Q6 and a control end of the seventh switch tube Q7 are commonly connected to the driving module 23, a current output end of the fifth switch tube Q5, a current input end of the seventh switch tube Q7 and a first end of the sixth resistor R6 are commonly connected, a second end of the sixth resistor R6 is connected to the first end of the first inductor L1, a second end of the first inductor L1, a current output end of the sixth switch tube Q38 and a current input end of the eighth switch tube Q8 are commonly connected, a second end of the ninth capacitor C9, a current input end of the ninth switch tube Q7 and a control end of the eighth switch tube Q8 are commonly connected to the rectifying module 21, a control end of the sixth switch tube Q8 and a control end of the eighth switch tube Q8 are commonly connected to the driving module 23, a current output end of the sixth switch A flow module 21.
In this embodiment, the conversion module 24 converts the rectified first direct-current voltage signal into an alternating current with a specific frequency, wherein the fifth switching tube Q5, the sixth switching tube Q6, the seventh switching tube Q7, and the eighth switching tube Q8 may be combined as two half-bridge inverter circuits, two diagonal switching tubes are combined into one pair, four arms in the circuit are combined into two pairs of arms, the fifth switching tube Q5 and the eighth switching tube Q8 are the first pair, and the sixth switching tube Q6 and the seventh switching tube Q7 are the second pair, and under the control of the driving signal, the two pairs of arms are alternately turned on to output an alternating current signal, thereby completing the conversion from the direct current to the alternating current. In one embodiment, the fifth switch Q5, the sixth switch Q6, the seventh switch Q7, and the eighth switch Q8 are all Insulated Gate Bipolar Transistors (IGBTs), a parasitic diode is present in the insulated gate bipolar transistor, a cathode of the parasitic diode is electrically connected to a current input terminal of the insulated gate bipolar transistor, and an anode of the parasitic diode is connected to a current output terminal of the insulated gate bipolar transistor.
In one embodiment, the control terminal of the fifth switch Q5 and the control terminal of the eighth switch Q8 are connected to the first output terminal of the driving module 23, and the control terminal of the sixth switch Q6 and the control terminal of the seventh switch Q7 are connected to the second output terminal of the driving module 23.
In one embodiment, the conversion module 24 is a full bridge inverter circuit.
In one embodiment, the rectifying module 21 is a bridge rectifying circuit, and as shown in fig. 5, the ninth diode D9, the twelfth diode D10, the eleventh diode D11 and the twelfth diode D12 form a bridge rectifying circuit, and the connection manner of the bridge rectifying circuit is as shown in fig. 5. In the present embodiment, the rectification module 21 employs four rectifier diodes, and utilizes the negative half cycle of the ac voltage to improve rectification efficiency, for converting the ac signal into a low-voltage dc signal, and to supply the conversion module 24 for charging the robot.
Wherein, the voltage of the AC power supply 11 is Ui, RL is the load, and the voltage U at the two ends of the load RL is in an ideal stateRLCan be represented by the formula (1):
in one embodiment, the bridge rectifier circuit in this embodiment is a rectifier chip that may be of the type MDQ 100-16.
Referring to fig. 6, an embodiment of the present application further provides a wireless charging system based on magnetic coupling resonance, including: the robot is internally provided with a receiving module 31 and a power supply storage module 32; an AC power supply port; a feedback signal source port; the wireless charging circuit is connected with the alternating current power supply port and the feedback signal source port respectively; when the receiving module is located within the preset distance of the wireless charging circuit, an inductance coil inside the receiving module and an inductance coil inside the conversion module 24 are mutually inductive, so that the alternating current signal provided by the conversion module 24 is converted into a corresponding second direct current voltage signal, and the second direct current voltage signal is used for charging the power storage module.
In this embodiment, the receiving module 31 is mainly a receiving circuit, and is configured to induce and generate a second dc voltage signal to charge the robot. In particular, the receiving module 31 may be connected to a power storage module in the robot.
In this embodiment, the utility power is inputted into the rectifier module 21 as the ac power supply 11 and is converted into a dc voltage through the bridge rectifier circuit, and the dc voltage is converted into a specific frequency ac power through the full-bridge inverter circuit of the converter module 24, and the two LC resonant circuits are respectively formed with the resonant capacitor through the transmitting coil and the receiving coil. The driving module 23 amplifies the signal transmitted from the control module 22, so that the signal has enough power to drive the conversion module 24 to work, thereby generating high-frequency alternating current, the working process does not need manual operation, the charging time is shortened, and the charging efficiency is improved.
In one embodiment, referring to fig. 7, the receiving module 31 includes: a second inductor Ls, a tenth capacitor Cs1, an eleventh capacitor Cs2, a first switch S1, and a second switch S2; a first terminal of the second inductor Ls and a first terminal of the first switch S1 are commonly connected to a first terminal of the tenth capacitor Cs1, a second terminal of the tenth capacitor C10, a second terminal of the first switch S1 and a first terminal of the eleventh capacitor C11 are commonly connected as a first output terminal of the receiving module 31, a second terminal of the eleventh capacitor Cs2 is connected to a first terminal of the second switch S2, and a second terminal of the second inductor Ls and a second terminal of the second switch S2 are commonly connected as a second output terminal of the receiving module 31.
In this embodiment, when the conversion module 24 generates an ac signal with the same frequency as the coil resonant frequency, the inductance coil in the conversion module 24 and the inductance coil in the module are mutually inducted to generate a constant voltage-constant current dc output to wirelessly charge the service robot.
In the present embodiment, the first inductor L1 serves as a transmitter coil, the ninth capacitor C9 serves as a resonant capacitor, and the first inductor L1 and the ninth capacitor C9 form an LC resonant circuit.
In one embodiment, the feedback signal source 12 may also be an inductive coil, which is configured to form a magnetic field coupling resonance with the transmitting coil, so as to generate a high-frequency alternating magnetic field, and further generate an induced current to feed back the control module 22.
In one embodiment, the power storage module 32 may be a lithium ion battery pack.
Further, because the core of this application embodiment lies in designing a wireless charging method based on magnetic coupling resonance, and does not relate to the transformation to the service robot, promptly the utility model discloses can be general in the service robot that has the wireless function of charging and carry out wireless charging operation, can not restricted by the receiving circuit structure that takes of service robot itself, but the service robot that has the wireless function of charging that the wide application is produced of different producers.
In the wireless charging circuit and wireless charging system based on magnetic coupling resonance that this application provided, will through rectifier module alternating current signal conversion that alternating current power supply provided is corresponding first direct current voltage signal, and drive module is based on the corresponding drive signal of control signal output that control module provided, then based on through conversion module drive signal will first direct current voltage signal conversion is alternating current signal to charge to the consumer in predetermineeing the distance, solved service robot and had high energy consumption, inefficiency scheduling problem in wired charging process "counterpoint difficult", traditional wireless charging mode.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A wireless charging circuit based on magnetic coupling resonance is characterized in that the wireless charging circuit is respectively connected with an alternating current power supply and a feedback signal source, and the wireless charging circuit comprises:
the rectification module is connected with the alternating current power supply and used for converting an alternating current signal provided by the alternating current power supply into a corresponding first direct current voltage signal;
the control module is connected with the feedback signal source and used for receiving the feedback signal provided by the feedback signal source and generating a corresponding control signal based on the feedback signal source;
the driving module is connected with the control module and used for receiving the control signal and outputting a corresponding driving signal based on the control signal; and
and the conversion module is connected with the rectifying module and used for receiving a driving signal and a first direct-current voltage signal, and converting the first direct-current voltage signal into an alternating-current signal based on the driving signal so as to wirelessly charge the electric equipment within a preset distance.
2. The wireless charging circuit of claim 1, wherein the control module comprises:
the amplitude limiting unit is connected with the feedback signal source and used for receiving a feedback signal provided by the feedback signal source and limiting the feedback signal within a preset voltage range;
and the zero-crossing detection unit is connected with the amplitude limiting unit and used for receiving the feedback signal and converting the alternating-current sine wave of the feedback signal into an alternating-current square wave with the same frequency as the alternating-current sine wave.
3. The wireless charging circuit of claim 2, wherein the clipping unit comprises: a first diode, a second diode, a third diode and a fourth diode;
the anode of the first diode and the anode of the third diode are connected to the feedback signal source in common, the cathode of the first diode is connected to the anode of the second diode, the cathode of the third diode is connected to the cathode of the fourth diode, and the anode of the second diode and the anode of the fourth diode are connected to the ground in common.
4. The wireless charging circuit of claim 2, wherein the zero-crossing detection unit comprises: the device comprises a first capacitor, a first resistor, a fifth diode, a sixth diode, a Schmitt trigger chip and a first working power supply end;
the first end of the first capacitor is connected with the amplitude limiting unit, the second end of the first capacitor is connected with the first resistor, the second end of the first resistor, the anode of the fifth diode, the anode of the sixth diode and the input end of the schmitt trigger chip are connected in common, the cathode of the fifth diode and the power supply end of the schmitt trigger chip are connected in common to the first working power supply end, and the anode of the sixth diode and the ground end of the schmitt trigger chip are connected in common to ground.
5. The wireless charging circuit of claim 1, wherein the driving module comprises: the current amplification chip comprises a current amplification chip, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a seventh diode, an eighth diode, a second working power supply end, a third working power supply end and a grid driving transformer;
the first input end of the current amplification chip is connected with the control module, the first enable signal end of the current amplification chip, the second enable signal end of the current amplification chip, the power supply end of the current amplification chip and the second capacitor are connected to a second working power supply end in common, the second end of the second capacitor is grounded, the second input end of the current amplification chip is connected with the ground end of the current amplification chip, the first output end of the current amplification chip, the first end of the third capacitor and the control end of the second switch tube are connected, the second end of the third capacitor, the anode of the seventh diode and the first end of the second resistor are connected to the control end of the first switch tube in common, the cathode of the seventh diode, the second end of the second resistor and the first end of the fourth capacitor are connected to the third working power supply end in common, the second end of the fourth capacitor is grounded, the current output end of the second switch tube is grounded, the current output end of the first switch tube, the current input end of the second switch tube, the first end of the seventh capacitor, the first end of the eighth capacitor, the first end of the fourth resistor and the first end of the fifth resistor are connected in common, the second end of the seventh capacitor, the second end of the eighth capacitor, the second end of the fourth resistor and the second end of the fifth resistor are connected in common to the gate drive transformer, the second output end of the current amplification chip and the first end of the fifth capacitor are connected in common to the control end of the fourth switch tube, the current output end of the fourth switch tube is grounded, the second end of the fifth capacitor, the anode of the eighth diode and the first end of the third resistor are connected in common to the control end of the third switch tube, the cathode of the eighth diode, the second end of the third resistor, the current input end of the third switching tube and the first end of the sixth capacitor are connected to the third working power supply end in common, the second end of the sixth capacitor is connected to the base, and the current output end of the third switching tube and the current input end of the fourth switching tube are connected to the gate drive transformer in common.
6. The wireless charging circuit of claim 1, wherein the conversion module comprises: a ninth capacitor, a fifth switch tube, a sixth switch tube, a seventh switch tube, an eighth switch tube, a sixth resistor and a first inductor;
the first end of the ninth capacitor, the current input end of the fifth switching tube and the current input end of the sixth switching tube are connected to the rectifier module in common, the control end of the fifth switching tube and the control end of the eighth switching tube are connected to the driving module, the control end of the sixth switching tube and the control end of the seventh switching tube are connected to the driving module, the current output end of the fifth switching tube, the current input end of the seventh switching tube and the first end of the sixth resistor are connected in common, the second end of the sixth resistor is connected with the first end of the first inductor, the second end of the first inductor, the current output end of the sixth switching tube and the current input end of the eighth switching tube are connected in common, the second end of the ninth capacitor, the current output end of the seventh switch tube and the current output end of the eighth switch tube are connected to the rectifier module in common.
7. The wireless charging circuit of claim 1, wherein the conversion module is a full-bridge inverter circuit.
8. The wireless charging circuit of claim 1, wherein the rectifying module is a bridge rectifier circuit.
9. A wireless charging system based on magnetic coupling resonance, comprising:
the robot is internally provided with a receiving module and a power supply storage module;
an AC power supply port;
a feedback signal source port; and
the wireless charging circuit of any one of claims 1-8, the wireless charging circuit being connected to the ac power port and the feedback signal source port, respectively;
when the receiving module is located within the preset distance of the wireless charging circuit, an inductance coil inside the receiving module and an inductance coil inside the conversion module are mutually inductive, so that the alternating current signal provided by the conversion module is converted into a corresponding second direct current voltage signal, and the second direct current voltage signal is used for charging the power storage module.
10. The wireless charging system of claim 9, wherein the receiving module comprises: the second inductor, the tenth capacitor, the eleventh capacitor, the first switch and the second switch;
the first end of the second inductor and the first end of the first switch are connected to the first end of the tenth capacitor, the second end of the first switch and the first end of the eleventh capacitor are connected to the first output end of the receiving module, the second end of the eleventh capacitor is connected to the first end of the second switch, and the second end of the second inductor and the second end of the second switch are connected to the second output end of the receiving module.
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