WO2018010538A1 - 一种无线充电输出装置 - Google Patents

一种无线充电输出装置 Download PDF

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Publication number
WO2018010538A1
WO2018010538A1 PCT/CN2017/089872 CN2017089872W WO2018010538A1 WO 2018010538 A1 WO2018010538 A1 WO 2018010538A1 CN 2017089872 W CN2017089872 W CN 2017089872W WO 2018010538 A1 WO2018010538 A1 WO 2018010538A1
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WO
WIPO (PCT)
Prior art keywords
numerical control
wireless charging
isolation transformer
unit
processor unit
Prior art date
Application number
PCT/CN2017/089872
Other languages
English (en)
French (fr)
Inventor
邢益涛
Original Assignee
深圳市特斯拉无线设备有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市特斯拉无线设备有限公司 filed Critical 深圳市特斯拉无线设备有限公司
Priority to JP2019500588A priority Critical patent/JP2019520784A/ja
Priority to US16/317,177 priority patent/US20190296580A1/en
Priority to EP17826876.9A priority patent/EP3487030A4/en
Publication of WO2018010538A1 publication Critical patent/WO2018010538A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/025—
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/10—Control circuit supply, e.g. means for supplying power to the control circuit

Definitions

  • the present invention relates to the field of wireless charging, and in particular, to a wireless charging output device.
  • the technical implementation of the wireless charging system includes a wireless charging output sub-module and a wireless charging input sub-module.
  • the wireless charging output sub-module generates an alternating current required for wireless charging, and then receives an alternating current required for wireless charging.
  • the wireless charging output coil module is driven to transmit alternating electromagnetic energy to the wireless charging input coil module, and then the sensed alternating current is converted to direct current to the device for power supply.
  • the wireless charging output sub-module it is generally divided into four parts: a power module, a low-frequency current transmission line, a wireless charging output circuit module, and a transmitting coil module, and the power supply is divided into two categories: Power frequency AC, and the other type is DC that may have interference signals.
  • the interference signal on the direct current of the interference signal includes a large voltage AC signal in the 10-300HZ frequency band and a small voltage AC signal in the 300Hz-10Khz frequency band, and the large voltage AC signal in the 10-300HZ frequency band causes the DC power supply voltage to vary greatly.
  • the wireless charging output is unbalanced or fails, and the small voltage AC signal of the 300Hz-10Khz band interferes with the communication signal of the wireless charging system, causing the wireless charging to fail to communicate and fail.
  • the power module of the first type of wireless charging output sub-module is generally a power adapter that converts power frequency alternating current into low-voltage direct current;
  • the low-frequency current transmission line is only suitable Conducting power direct current and a conventional electric wire lower than IKhz alternating current electric energy, such as a USB line;
  • the wireless charging output circuit module includes a bridge inverter circuit controlled by a controller IC, and the bridge inverter circuit is connected by at least two in series
  • the controllable switch component is controlled by the controller IC to control the sequence of the switch and the alternating current in the two series of controllable electrical connection points; the transmit coil module will be The alternating current generated by the wireless charging output circuit module is converted into an alternating magnetic field.
  • the wireless charging output circuit module and the transmitting coil module are generally installed in the same housing to form a wireless charging transmitter product, or in rare cases are installed in two or more parts but tightly Mechanically connected together in a set of enclosures.
  • the power adapter converts the power frequency alternating current into a low-voltage direct current circuit system, including a high-loss circuit for the inverter and a half-bridge rectifier for outputting the low-voltage direct current, and the overall efficiency generally does not exceed 90. %.
  • the wireless charging output circuit module converts the low-voltage direct current into a circuit system for wireless charging alternating current, including the main loss circuit of the numerical control bridge inverter circuit, and the efficiency generally does not exceed 90%.
  • the output of the 5W wireless charging output subsystem system generally generates 2W of heat, and if the wireless charging system is upgraded to 20W, the generated heat will reach 12W, or the casing temperature of about 120 °C. This will be very dangerous.
  • the cost of the wireless charging transmitter product composed of the low frequency current power line, the wireless charging output circuit module, and the transmitting coil module is relatively low, about 5-6 dollars, but When the output power rises to 20 W, the wireless charging transmitter product cost will reach $20.
  • the cost of outputting a 5W power adapter and a 20W power adapter is $1 and $2, respectively. Therefore, using the prior art to implement the wireless charging output sub-module will not promote the high-power wireless charging system because of the high cost.
  • the wireless charging output sub-module Since the wireless charging output sub-module generates a large amount of heat, so that the wireless charging receiving device, such as the mobile phone, is dead or damaged, the wireless charger implemented by the conventional method is inevitably used in order to achieve medium and high output power and low temperature. Increase the volume and heat dissipation surface area, add a cooling fan, and isolate the heat source. This results in a very large product volume and a large increase in the cost of mechanical structural parts, which is not conducive to production and transportation. Therefore, in order to popularize the first type of medium and high power wireless charging system, it is necessary to solve the problem of efficiency, volume and cost of the wireless charging output sub-module.
  • the power module of the second type of wireless charging output sub-module is generally a DC/DC power supply circuit, and its function is to convert the input fluctuating direct current into an ideal noise-free circuit. Constant voltage DC.
  • the second type of wireless charging output sub-module is generally used in the case of large-capacity battery power supply, such as in a car.
  • the DC/DC power supply circuit generally has an efficiency of only about 90%, so that a large amount of heat is generated when outputting a large power wireless charging energy. And the higher the quality of the DC/DC power supply circuit, the higher the cost, and the higher the quality, the larger the volume.
  • the bridge inverter circuit included in the conventional wireless charging output circuit module needs to be as short as possible in order to improve the efficiency and reduce the heat in order to improve the efficiency and reduce the heat.
  • it is generally 50-300 ns.
  • an interference signal of about 1.6-lOMhz is generated, and then transmitted to the power supply through the DC/DC power supply circuit, which affects other devices mounted on the same power supply.
  • the data communication frequency of the CAN bus is generally l-10Mhz, which is easily affected by the interference signal of this power type, causing serious consequences such as brake failure and control failure.
  • the risk is even higher.
  • the technical problem to be solved by the present invention is to provide a wireless charging output device, which needs to solve the problem of efficiency, volume and cost of the first type of wireless charging output sub-module, and the second type, in view of the above-mentioned drawbacks of the prior art.
  • the efficiency, cost, immunity to external interference, and signal interference caused by the wireless charging output sub-module is to provide a wireless charging output device, which needs to solve the problem of efficiency, volume and cost of the first type of wireless charging output sub-module, and the second type, in view of the above-mentioned drawbacks of the prior art.
  • a wireless charging output device which includes:
  • an isolation transformer the main stage side of the isolation transformer is connected to the DC input end;
  • a first numerical control switching unit the first numerical control switching unit is disposed between the direct current input end and the main stage side of the isolation transformer, and the first numerical control switching unit is turned on or off at the main stage of the isolation transformer AC power is generated on the side;
  • a wireless coil module the wireless coil module is connected to a secondary side of the isolation transformer, and externally outputs AC power required for wireless charging;
  • an information extraction unit the information extraction unit is connected to an isolation transformer, and the information extraction unit is configured to extract, isolate, filter, and condition current information on the transformer, obtain corresponding real information, and transmit the information to the processor unit;
  • the processor unit is respectively connected to the first numerical control related unit and the information extraction unit, and the processor unit obtains a control signal according to the actual information and controls the operation of the first numerical control related unit.
  • the first numerical control switching unit comprises a first numerical control switch and a first numerical control driving module
  • the first numerical control switch is disposed between the direct current input end and the main level side of the isolation transformer
  • the first numerical control driving module is connected to the processor unit, and the processor unit generates a signal including a switching frequency signal, a switching duty ratio, and a power adjustment signal, and the first numerical control driving module drives the first numerical control based on the signal Turn on or off.
  • the processor unit and the information extraction unit are both disposed on the secondary side of the isolation transformer;
  • the wireless charging output device further includes an isolated signal transmission unit, and the isolated signal transmission unit respectively
  • the isolation transformer, the processor unit and the first numerical control driving module are connected, and the isolated signal transmission unit is configured to transmit the switching frequency signal, the switching duty ratio information and the power adjustment signal from the secondary side of the isolation transformer to the main stage side The first CNC drive module.
  • the preferred solution is: the processor unit and the information extraction unit are both disposed on the main stage side of the isolation transformer; the first numerical control switching unit includes a first numerical control, the first numerical control and processing The processor unit is connected, and the processor unit generates a signal including a switching frequency, a duty ratio of the switching, and a power adjustment signal, and the processor unit drives the first numerical control to turn on or off according to the signal.
  • the preferred embodiment is as follows:
  • the first numerical control driving module includes a power receiving driving module, and the power receiving driving module includes a preset driving signal, and the power receiving driving module is just received and not received. Turn off the frequency signal and the duty cycle information ⁇ , drive the first CNC switch to turn on or off according to the preset drive signal
  • the DC input terminal is a rectification energy storage module
  • the rectification energy storage module includes a capacitor
  • the input end of the rectification energy storage module is connected with a power frequency AC
  • the output of the rectification energy storage module The end is connected to the main stage side of the isolation transformer, and the rectification energy storage module is used for rectifying the commercial frequency alternating current into direct current and storing in the capacitor.
  • the wireless charging output device further includes an AC power connector higher than lKhz And an AC power transmission cable higher than IKhz, the AC power connector higher than IKhz is respectively connected to the secondary side of the isolation transformer and the AC power transmission cable higher than IKhz, which is higher than the IKhz AC power transmission cable and The wireless coil module is connected, and the AC power transmission cable higher than IKhz is used to generate an alternating current for the long-distance transmission of the isolation transformer and transmit it to the wireless coil module at a long distance.
  • the wireless charging output device comprises a digitally controlled gate and a second rectifier voltage regulator module on the secondary side of the isolation transformer, the digitally controlled gate is separately isolated from the secondary side of the isolation transformer a secondary rectification voltage regulator module, a processor unit and a wireless coil module are connected to the secondary side of the transformer; the processor unit generates a selection signal and transmits it to the digital control gate, and the numerical control gate is connected to the isolation transformer according to the selection signal
  • the secondary side output AC power is transmitted to the second rectifier voltage regulator module or the wireless coil module of the isolation transformer secondary side; the second rectifier voltage regulator module of the isolation transformer secondary side is used for rectifying the alternating current into direct current and storing it, and Output to DC powered devices.
  • the wireless charging output device further includes a second numerical control switch and an AC/DC power connector, and the second digital control switch is respectively connected to the second rectifier voltage regulator module of the isolation transformer secondary side.
  • the DC power connector is connected to the processor unit; the second numerical control switch is turned on or off according to the processor unit, and the AC/DC power connector is used for outputting alternating current and direct current, the AC/DC power connector and the wireless coil module Or DC powered devices are connected.
  • the preferred embodiment is: the DC input terminal and the main transformer side of the isolation transformer further includes a filtering unit, the filtering unit is a high-pass filter or an envelope filtering circuit, and the filtering unit is configured to input a DC input
  • the ripple of the current above 10 Hz and below the lOKhz frequency is filtered to avoid crosstalk to the secondary side of the isolation transformer and to generate noise interference on the information extraction unit.
  • the beneficial effects of the present invention are that, compared with the prior art, the present invention reduces the power loss and improves by designing a wireless charging output device to remove the traditional large-volume, high-power, high-cost module and simplify the circuit.
  • the overall efficiency of the wireless charging output device reduces the cost and reduces the volume of the product; and through the cooperation of the first numerical control unit, the information extraction unit and the processor unit, the efficiency is improved, the cost and volume are reduced, and the filter is filtered. In addition to external noise and the purpose of avoiding interference signals.
  • FIG. 1 is a schematic diagram showing the circuit structure of a wireless charging output device according to the present invention.
  • FIG. 2 is a schematic diagram showing the circuit structure of a wireless charging output device having an AC power transmission cable higher than IKhz according to the present invention
  • FIG. 3 is a schematic diagram showing the circuit structure of a wireless charging output device with numerical control gate switching according to the present invention.
  • FIG. 4 is a schematic diagram showing the circuit structure of a wireless charging output device having a second numerical control switch according to the present invention.
  • FIG. 5 is a schematic diagram showing the circuit structure of a wireless charging output device having a high-pass filter according to the present invention.
  • FIG. 6 is a schematic diagram showing the circuit structure of a wireless charging output device having an envelope filter circuit according to the present invention.
  • FIG. 7 is a schematic diagram showing the circuit structure of another embodiment of the wireless charging output device of the present invention.
  • the present invention provides a preferred embodiment of a wireless charging output device.
  • a wireless charging output device includes a DC input terminal, an isolation transformer 12, a wireless coil module 13, a first numerical control switching unit 14, an information extraction unit 15, and a processor unit 16, a DC input terminal and an isolation transformer 12
  • the main stage side is connected, the wireless coil module 13 is connected to the secondary side of the isolation transformer 12, and the first numerical control switching unit 14 is disposed between the DC input terminal and the main stage side of the isolation transformer 12, and the information extraction unit 15 is isolated.
  • the transformers 12 are connected, and the processor unit 16 is respectively connected to the first numerical control switching unit 14 and the information extracting unit 15, and the details are as follows:
  • the DC input terminal is used for inputting the DC power II, converted into an AC VI higher than IKhz by the first numerical control switching unit 14, and input to the main stage side of the isolation transformer 12 in.
  • the DC input terminal is a rectification energy storage module 11
  • the rectification energy storage module 11 includes a capacitor C1.
  • the input end of the rectification energy storage module 11 is connected to the power frequency AC V0.
  • the rectification energy storage module 11 The output end is connected to the main stage side of the isolation transformer 12, and the rectification energy storage module 11 is used to rectify the power frequency AC
  • the current is DC, that is, DC II, and is stored in capacitor C1.
  • the two ends of the rectifying energy storage module 11 are respectively connected to the two ends of the main transformer side of the isolation transformer 12, and the capacitor C1 is connected in parallel on both ends of the rectifying energy storage module 11.
  • the main stage side of the isolation transformer 12 is connected to the AC power VI higher than IKhz, the second stage side output is higher than the AC voltage V2 of the IKhz, and the isolation transformer 12 refers to the input winding and the output winding.
  • the transformer with electrical isolation the isolation transformer 12 is used to avoid accidental contact with the charged body, and the isolation of the transformer is to isolate the current of the original secondary winding around the coil.
  • the isolation transformer 12 has multiple windings, wherein one winding provides energy to the first numerical control switching unit 14; the wires in the multiple windings adopt a multi-strand enameled wire or flat cable that lowers the skin effect higher than IKhz Achieved, the radius of the enameled wire or half the thickness of the flat cable is less than the skin depth at the set upper limit operating frequency.
  • the first numerical control switching unit 14 of the embodiment is disposed between the direct current input end and the main stage side of the isolation transformer 12, and the first numerical control switching unit 14 is connected.
  • the AC or VI on the main stage side of the isolation transformer 12 generates an AC VI higher than IKhz.
  • the first numerical control switching unit 14 includes a first numerical control switch 141 and a first numerical control driving module 142, and the first numerical control switch 141 is disposed between the direct current input end and the main stage side of the isolation transformer 12
  • the first numerical control driving module 142 is connected to the processor unit 16, and the processor unit 16 generates a control signal including a switching frequency signal, a switching duty ratio information, and a power adjustment signal, and the first numerical control driving module 142 is controlled according to the control.
  • the signal drives the first numerical control switch 141 to be turned on or off.
  • the first numerical control switch 141 is disposed at one end of the direct current input end and one end of the main transformer side of the isolating transformer 12, preferably in the input end of the direct current input end and the output end of the main stage side of the isolating transformer 12.
  • the first numerical control driving module 142 includes a power receiving driving module, and the power receiving driving module includes a preset driving signal, and the power receiving driving module is just powered and does not receive the switching frequency signal.
  • the duty ratio information ⁇ the first numerical control switch 141 is driven to be turned on or off according to a preset driving signal. Specifically, after the processor unit 16 does not output the switching frequency signal and the turn-off duty ratio of the switching duty ratio exceeds the preset time T1, the power-on driving module outputs the signal according to the preset driving signal.
  • the frequency F 1 is given to the first numerical control switch 141 for driving the first numerical control switch 141 to operate; 2.
  • the processor unit 16 has the output switching frequency signal and the switching duty information to the electric drive Module ⁇
  • electric drive The module drives the first numerical control switch 141 to operate according to the switching frequency signal and the duty cycle information outputted by the processor unit 16.
  • the driving signal is a high and low level signal of the same frequency and the same duty ratio as the signal output by the processor unit 16.
  • the power supply of the power-on driving module is derived from the DC power input or the energy of the rectified output of the main-stage side of the isolation transformer 12.
  • the wireless coil module 13 is connected to the secondary side of the isolation transformer 12, and externally outputs an alternating current V2 higher than lKhz required for wireless charging.
  • the information extracting unit 15 is connected to the isolation transformer 12, and the information extracting unit 15 is configured to extract current information on the isolation, filtering and conditioning transformers, and obtain corresponding real information. And transmitted to the processor unit 16.
  • the information extracting unit 15 is implemented by a sampling sensor, such as a resistor, a filtering and a signal conditioning circuit, having the capability of extracting an alternating current signal, an average direct current signal from a secondary side of the isolating transformer 12, and from a wireless
  • a sampling sensor such as a resistor, a filtering and a signal conditioning circuit, having the capability of extracting an alternating current signal, an average direct current signal from a secondary side of the isolating transformer 12, and from a wireless
  • the power of the external wireless device sensed in the coil module 13 adjusts the digital signal and is transmitted to the processor unit 16.
  • the processor unit 16 of the embodiment is respectively connected to the first numerical control related unit 14 and the information extracting unit 15, and the processor unit 16 obtains a control signal according to the actual information and controls the first A numerical control unit 14 works.
  • the processor unit 16 includes the following functions: 1. monitoring the secondary side output voltage of the isolation transformer 12; 2. reading the signal output by the information extraction unit 15; 3. decoding the power adjustment digital signal; 4 calculating the current output Power and the power to be output in the next step; 5. Drive the isolated signal transmission unit output power control signal; 6. Drive the isolated signal transmission unit to the external wireless charging device to transmit the communication signal; 7. Generate a signal for detecting the external wireless charging device; 8. Determine whether there is an external wireless charging device; 9. Determine whether there is any metal foreign matter.
  • the processor unit 16 and the information extracting unit 15 are both disposed on the secondary side of the isolation transformer 12; the wireless charging output device further includes an isolated signal transmission unit, and the isolated signal transmission unit and the isolation transformer respectively 12.
  • the processor unit 16 is connected to the first numerical control driving module 142, and the isolated signal transmission unit is configured to transmit the control signal from the secondary side of the isolation transformer 12 to the first numerical control drive on the main stage side. In module 142.
  • the isolated signal transmission unit is any one of a digital optical coupling device, a capacitor C1 or a digital magnetic coupling device.
  • the wireless charging output device further includes an isolation rectifier secondary side first rectification voltage regulator module 18, the power rectification voltage regulator module is connected to the secondary side of the isolation transformer 12, and the isolation transformer secondary side
  • a rectifying voltage regulator module 18 includes a rectifying voltage stabilizing circuit 181 and an external circuit thereof, and the first rectifying voltage stabilizing module 18 on the secondary side of the isolating transformer is used for rectifying and stabilizing the output of the secondary side of the isolating transformer 12 to generate a device.
  • the DC voltage is set and transmitted to processor unit 16 to power processor unit 16.
  • the wireless charging output device includes two modes of operation.
  • the processor unit 16 controls the wireless coil module 13 to generate a detection signal. If the signal fed back by the information extraction unit 15 is within the set inter-turn width T2, the processor unit 16 determines that Without external devices, the processor unit 16 will wait for a certain period of time T2' to restart the detection.
  • the processor unit 16 controls the wireless charging output device to enter.
  • the power output state and try to communicate with the external device, and after the communication is successful, confirm that the external device is the wireless charging input device, and wirelessly charge the wireless charging input device according to the protocol.
  • the processor unit 16 re-controls the wireless charging output device to enter the state of detecting the powered device.
  • the present invention provides a preferred embodiment of a wireless charging output device having a power transmission cable higher than 1 Khz.
  • the wireless charging output device further includes an AC power connector 21 higher than 1 Khz and an AC power transmission cable 22 higher than 1 Khz, and the AC power connector 21 higher than 1 Khz is disposed on the secondary side of the isolation transformer 12, respectively.
  • the AC power transmission cable 22 higher than 1Khz is connected to the wireless coil module 13, and the AC power transmission cable 22 is higher than 1Khz.
  • the isolation transformer 12 is used to generate an AC power V2 higher than IKhz for long-distance transmission and is transmitted to the wireless coil module 13 at a long distance with low loss.
  • the AC power transmission cable 22 higher than IKhz has the characteristics of extremely low loss transmitting AC energy higher than IKhz.
  • the present invention provides a preferred embodiment of a wireless charging output device having a digitally controlled gate.
  • the wireless charging output device includes a numerical control gate switch 31 and a second rectifier voltage regulator module 32 on the secondary side of the isolation transformer.
  • the NC gates 31 are respectively connected to the secondary side of the isolation transformer 12 and the secondary side of the isolation transformer.
  • the second rectification voltage regulator module 32, the processor unit 16 and the wireless coil module 13 are connected; the processor unit 16 generates a selection signal and transmits it to the numerical control strobe gate 31, and the numerical control strobe gate 31 will be based on the selection signal.
  • the alternating current V2 of the secondary side of the isolation transformer 12 that is higher than IKhz is transmitted to the second rectifier voltage regulator module 32 or the wireless coil module 13 of the isolation transformer secondary side; the second rectifier voltage regulator module 32 of the isolation transformer secondary side It is used to rectify the AC power V2 higher than IKhz to DC power higher than IKhz and store it, and output it to the DC power receiving device.
  • the DC power 12 outputted by the second rectification voltage regulator module 32 of the isolation transformer secondary side is higher than the IKhz to the processor unit 16, and the processor unit 16 is configured to monitor the second rectifier voltage regulator module of the isolation transformer secondary side.
  • the wireless charging output device further includes an AC/DC power connector 33 for outputting an AC power V2 higher than IKhz and a DC power 12 higher than IKhz with low loss, the AC/DC power
  • the connector 33 is connected to the wireless coil module 13 or the DC power receiving device.
  • the AC/DC power connector 33 includes a plurality of communication ports, and the communication port is connected to the processor unit 16.
  • the common input end of the numerical control strobe switch 31 is connected to the AC output end of the secondary side of the isolation transformer 12, and the first output end of the numerical control strobe switch 31 is connected to the AC input of the wireless coil module 13.
  • the second output end of the numerical control strobe switch 31 is connected to the input end of the second rectification voltage regulator module 32 of the isolation transformer secondary side, and the control signal input end of the numerical control strobe switch 31 is connected to the processor unit 16 for processing
  • the unit 16 controls which of the outputs of the common input of the digitally controlled gate 31 is electrically connected.
  • the wireless charging output device includes two modes of operation.
  • Working mode 1 is to alternately detect the state of the powered device:
  • the processor unit 16 controls the numerical control gate according to the setting branch. 31 performs output switching; at a certain moment, the numerical control gate switch 31 outputs to the wireless coil module 13, and the processor unit 16 controls the wireless charging output device to emit a signal for detecting presence or absence of an external device through the wireless coil module 13.
  • the processor unit 16 controls the numerical control strobe 31 switches the output to the second rectifier voltage regulator module 32 on the secondary side of the isolation transformer, and then the processor unit 16 controls the wireless charging output device to generate a set DC voltage on the secondary rectifier voltage regulator module 32 on the secondary side of the isolation transformer.
  • the communication port notifies the processor unit 16 that the DC power receiving device is present, and the processor unit 16 determines that the output of the second rectifier voltage regulator module 32 of the isolation transformer secondary side is not connected to the DC power receiving device, and then the processor unit 16
  • the numerical control gate 31 output will be re-controlled to the wireless coil module 13.
  • the processor unit 16 determines that an external device is present within the sensing range of the wireless coil module 13, the processor unit 16 maintains the numerical control gate 31.
  • the output connection state is unchanged, and the wireless charging output device is switched to the power output state according to the setting, and the wireless charging output is energized according to the set mode.
  • the processor unit 16 determines that the output terminal is connected to a DC power receiving device, and then the processor unit 16 The output connection state of the numerical control strobe gate 31 is maintained, and the wireless charging output device is controlled to switch to the power output state according to the setting, and the DC power supply is initially attempted according to the set mode.
  • the processor unit 16 may further trim the output voltage value VI of the second rectification voltage regulator module 32 of the isolation transformer secondary side according to the current signal fed back by the signal extraction unit to cancel the second rectification stability of the isolation transformer secondary side.
  • the voltage module 32 outputs a DC cable loss to the DC power receiving device, so that the voltage of the DC power receiving device is close to or equal to the target voltage.
  • the processor unit 16 can also be based on AC and DC power The information fed back from the signal communication port of the connector 33 adjusts the voltage value VI outputted by the second rectifier voltage regulator module 32 on the secondary side of the isolation transformer to meet the design requirements of the power receiving device.
  • the processor unit 16 determines that the powered device has been removed, it controls the wireless charging output device to return to the alternately detected powered device state.
  • the present invention provides a preferred embodiment of a wireless charging output device having a second numerical control.
  • the wireless charging output device further includes a second numerical control switch 41, and the second numerical control switch 41 and the isolation transformer secondary side second rectification voltage regulator module 32, the AC/DC power connector 33 and the processor unit 16 respectively
  • the second numerical control switch 41 is turned on or off according to the processor unit 16, and the AC/DC power connector 33 is used for outputting the alternating current V2 higher than IKhz and the direct current 12 higher than IKhz with low loss.
  • the DC power connector 33 is connected to the wireless coil module 13 or the DC power receiving device.
  • the input end of the AC/DC power connector 33 is connected to the common output terminal of the second numerical control switch 41, and the output end of the AC/DC power connector 33 is connected to the information extracting unit 15, and the AC/DC power connector 33 is connected. Also included are a number of communication ports that are coupled to the processor unit 16.
  • the first input end of the second numerical control switch 41 is connected to the secondary side output end of the isolation transformer 12, and the second input end of the second numerical control switch 41 is connected to the output of the second rectifying and regulating module 32 of the secondary side of the isolation transformer. end.
  • the input of the digital strobe switch 31 is connected to the secondary side output of the isolating transformer 12, and the output of the digital strobe switch 31 is connected to the input of the second rectifying and regulating module 32 of the secondary side of the isolator.
  • the NC gate 31 and the second CNC 41 are controlled by the processor unit 16.
  • the wireless charging output device includes three modes of operation.
  • the information extraction unit 15 feeds back a corresponding signal to the processor unit 16, when the weather processor unit 16 controls the wireless charging output device to enter the judgment output mode state, and the default The state of the external device is detected under the DC power supply mode, and the common control output of the NC gate 31 is turned on, the common output of the second CNC switch 41 is connected to the second input terminal, and the wireless charging output device is controlled in the isolation transformer.
  • the preset voltage value V 1 is outputted on the second side rectification voltage regulator module 32 of the stage side.
  • the information extracting unit 15 In the state of determining the output mode, if a dedicated wireless coil mode is inserted into the AC/DC power connector 33 Group 13, then the information extracting unit 15 generates a signal SI corresponding to the preset to the processor unit 16, or notifies the processor unit 16 via the communication port of the AC/DC power connector 33, so that the processor unit 16 will wirelessly charge.
  • the working mode of the output device is switched to a mode of outputting wireless charging energy, and a state of detecting an external device in a corresponding wireless charging mode. If the information extracting unit 15 generates another signal S2 that matches the preset to the processor unit 16, or notifies the processor unit 16 through the communication port of the AC/DC power connector 33, so that the processor unit 16 will operate the wireless charging output device. Switch to the mode of outputting DC energy and the state of detecting external devices in the corresponding DC power supply mode.
  • the information extracting unit 15 In the DC power supply mode, in the state of detecting the external device, if the output end of the AC/DC power connector 33 is connected to a DC power receiving device, the information extracting unit 15 generates an expected signal S3 for processing.
  • the processor unit 16 controls the wireless charging output device to issue a detection signal according to the setting, and if the information extracting unit 15 generates a valid detection result signal, the reminder
  • the processor unit 16 has an external device next to the wireless charging output coil module.
  • the processor unit 16 controls the wireless charging output device to enter the wireless charging power output state and attempts to perform wireless charging output power supply according to the set mode.
  • the information extracting unit 15 When the dedicated wireless coil module 13 is removed, the information extracting unit 15 generates a corresponding signal in the state of detecting the external device state or the power output state, and the processor unit 16 controls the wireless charging output device to return to the default.
  • the state of the external device is detected in the DC power supply mode.
  • the wireless charging output device includes two working modes, wherein the first type is a wireless charging output mode, and the second type is a DC power output mode:
  • the first numerical control switch 141 is controlled according to a predetermined setting to generate a required alternating current V2 higher than lKhz on the secondary side of the isolation transformer 12, ⁇ control the first digital strobe switch 31 strobe the second output terminal, the same second CNC switch 41 conduction, the processor The unit 16 actually reads the signal fed back by the signal extraction unit.
  • the wireless coil module 13 feeds back a first valid signal, so that the processor unit 16 controls the first digital control gate 31 to strobe.
  • An output terminal is disconnected from the second CNC switch 41, and the processor unit 16 controls the wireless coil module 13 to enter a wireless charging operation mode to provide energy to the wireless charging input device, and the first valid signal is generated on the signal extraction unit.
  • the pulse signal is an identification signal transmitted through the second signal communication port of the AC/DC power connector 33.
  • the signal extraction unit, the isolation transformer secondary side second rectifier voltage regulator module 32 or the AC/DC power connector 33 provides a second to the processor unit 16.
  • the effective signal, the processor unit 16 keeps the current state of the first digital control gate 31 and the second numerical control switch 41 unchanged, and controls the wireless coil module 13 to enter the DC power supply output mode according to the preset control.
  • the DC power receiving device supplies power, and the second effective signal includes a current change signal generated on the signal extracting unit, a voltage change signal generated at an output end of the second rectifying and regulating module 32 on the secondary side of the isolation transformer, and is connected by AC/DC power.
  • the processor unit 16 When the AC/DC power connector 33 is disconnected from the DC power receiving device, the processor unit 16 does not receive the second valid signal, so that the processor unit 16 controls the wireless coil module 13 to return to the initial state. .
  • the present invention provides a preferred embodiment of a wireless charging output device having a filtering unit.
  • the DC input terminal and the main stage side of the isolation transformer 12 further comprise a filtering unit, and the filtering unit is a high-pass filter 51 or an envelope filtering circuit 52, and the filtering unit is configured to apply current on the DC input end. Ripple above 10 Hz and below the lOKhz frequency is filtered to avoid crosstalk to the secondary side of the isolation transformer 12 and to cause noise interference on the information extraction unit 15.
  • the high pass filter 51 is connected in series between the DC input terminal and the main stage side of the isolation transformer 12;
  • the envelope filter circuit 52 includes a diode and a capacitor.
  • the filtering unit further includes a common mode/differential mode low pass filter.
  • the present invention provides a preferred embodiment of a wireless charging output device.
  • the processor unit 16 and the information extracting unit 15 are both disposed on the main stage side of the isolation transformer 12; the first numerical control switching unit 14 includes a first numerical control switch 141, and the first numerical control switch 141 and The processor unit 16 is connected.
  • the processor unit 16 generates a control signal including a switching frequency and a switching duty ratio.
  • the processor unit 16 drives the first numerical control switch 141 to turn on or off according to the control signal.

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Abstract

一种无线充电输出装置，涉及无线充电领域，该无线充电输出装置包括：隔离变压器（12），该隔离变压器的主级侧与直流电输入端连接；第一数控开关单元（14），第一数控开关单元通过接通或断开在隔离变压器的主级侧上产生交流电；无线线圈模组（13），对外输出无线充电所需的交流电能；信息提取单元（15），该信息提取单元用于提取隔离、滤波及调理隔离变压器上的电流信息，获得对应的实时信息，并传输到处理器单元（16）中；处理器单元，该处理器单元根据实时信息获得控制信号并控制第一数控开关单元工作。该无线充电输出装置去除了传统大体积高功耗高成本的模块，简化了电路，从而减少了功率损耗，提升了无线充电输出装置的整体效率，同时大幅度降低成本，缩小了产品体积。

Description

一种无线充电输出装置
技术领域
[0001] 本发明涉及无线充电领域， 具体涉及一种无线充电输出装置。
背景技术
[0002] 无线充电系统的技术实现， 包括无线充电输出子模组和无线充电输入子模块两 部分， 所述无线充电输出子模组产生无线充电所需的交流电， 再通过无线充电 所需的交流电驱动无线充电输出线圈模组传递交变电磁能给无线充电输入线圈 模组， 然后再将感应到的交流电转直流给设备进行供电。
[0003] 在无线充电输出子模组的具体实现上， 一般分为电源模块、 低频电流输电线、 无线充电输出电路模块、 发射线圈模块四个部分， 并且供电电源分为两类： 一 类是工频交流电， 另一类是可能带有干扰信号的直流电。 所述干扰信号的直流 电上的干扰信号包括 10-300HZ频段的大电压交流信号和 300Hz-10Khz频段的小电 压交流信号， 所述 10-300HZ频段的大电压交流信号会导致直流电源电压变化极 大， 造成无线充电输出失衡或者失效， 而所述 300Hz-10Khz频段的小电压交流信 号会干扰无线充电系统工作吋候的通信信号， 造成无线充电吋无法正常通信以 及失效。
[0004] 在第一类无线充电输出子模组中， 第一类无线充电输出子模组的电源模块一般 为将工频交流电转换为低压直流电的电源适配器； 所述低频电流输电线为只适 合传导功率直流电与低于 IKhz交流电能的常规电线， 比如 USB线； 所述无线充 电输出电路模块包含通过控制器 IC控制的桥式逆变电路， 所述桥式逆变电路至 少由两个串联的可控幵关组成， 由所述控制器 IC控制幵关的顺序与吋间， 在所 述的两个串联的可控幵关的电连接点产生符合需求的交流电； 所述发射线圈模 块将所述无线充电输出电路模块产生的交流电转变为交变磁场。 所述无线充电 输出电路模块与所述发射线圈模块两个部分一般会安装在同一个外壳内做成无 线充电发射器产品， 或者极少情况下是安装在分成两个或多个部分的但是紧密 机械连接在一起的一组外壳内。 [0005] 首先， 电源适配器将工频交流电转换为低压直流电的电路系统， 包括用于逆变 的幵关与用于输出低压直流电的半桥整流器两部分高损耗的电路， 综合效率一 般不超过 90%。
[0006] 其次， 无线充电输出电路模块将低压直流电转换为无线充电用交流电的电路系 统， 包括数控桥式逆变电路这一参数主要损耗的电路， 其效率一般不会超过 90%
[0007] 因此， 假设电源适配器的工作效为在 85%， 而将低压直流电通过无线充电方式 传递给无线充电接收设备过程中的效率也在 85%左右， 因此整个无线充电系统的 效率仅 72.25%， 因此这会造成能量浪费以及产生大量的热量。
[0008] 而实际中， 输出 5W的无线充电输出子系统系统产生的热量一般为 2W， 而假如 升级为 20W的无线充电系统， 产生的热量将会达到 12W， 或者是大约 120°C的外 壳温度， 这将是十分危险的。
[0009] 当无线充电输出装置功率小于 5W的吋候， 所述低频电流输电线、 无线充电输 出电路模块、 发射线圈模块组成的无线充电发射器产品的成本较低， 大约 5-6美 金， 但是当输出功率升高到 20W吋， 所述无线充电发射器产品成本会达到 20美金 。 而输出 5W的电源适配器与输出 20W的电源适配器， 其成本分别是 1美金和 2美 金。 因此采用现有技术实现无线充电输出子模组， 将会因为成本过高而不能推 广高功率无线充电系统。
[0010] 由于所述无线充电输出子模组会产生大量的热量， 以至于导致无线充电接收设 备比如手机死机、 损坏， 因此采用传统方式实现的无线充电器为了实现中高输 出功率而且低温， 必然采用加大体积与散热表面积、 加入散热风扇、 隔离热源 等方式， 这就导致了产品体积非常大、 机械结构件成本大幅度增加， 因而不利 于生产与运输。 因此， 要普及第一类中高功率无线充电系统， 需要解决无线充 电输出子模块的效率、 体积、 成本问题。
[0011] 在第二类无线充电输出子模组中， 第二类无线充电输出子模组的电源模块一般 为 DC/DC电源电路， 其功能是将输入的波动的直流电转换为理想的无噪声的恒 压直流电。 第二类无线充电输出子模组一般用于大容量电池供电的场合， 比如 汽车内。 [0012] 但是， 所述 DC/DC电源电路一般效率只有 90%左右， 因此在输出较大功率无线 充电能量吋候也会产生巨大的热量。 并且所述 DC/DC电源电路品质越高成本越 高， 以及品质越高体积也越大。
[0013] 同吋， 传统的无线充电输出电路模块包含的桥式逆变电路在工作吋候， 为了提 高效率降低热量， 需要所述串联的可控幵关同吋关闭的吋间尽可能短 _根据 实际情况一般为 50-300ns， 换言之就会产生大约 1.6-lOMhz的干扰信号， 然后通 过所述 DC/DC电源电路传导到供电电源上， 对其他挂载在相同供电电源的设备 产生影响。 在汽车上， CAN总线的数据通信频率一般是 l-10Mhz， 恰好容易被这 种功率型的干扰信号所影响， 造成刹车失灵、 控制失效等严重后果。 尤其在大 客车上由于需要为每个座位铺设一个无线充电输出装置， 那么风险就更高了。
[0014] 因此， 要普及第二类中高功率无线充电系统， 需要解决无线充电输出子模块的 效率、 成本、 抗外界干扰和产生超干扰的问题。
技术问题
[0015] 本发明要解决的技术问题在于， 针对现有技术的上述缺陷， 提供一种无线充电 输出装置， 需要解决第一类无线充电输出子模块的效率、 体积和成本问题， 以 及第二类无线充电输出子模块的效率、 成本、 抗外界干扰和产生信号干扰的问 题。
问题的解决方案
技术解决方案
[0016] 本发明解决其技术问题所采用的技术方案是： 提供一种无线充电输出装置， 包 括：
[0017] 直流电输入端；
[0018] 隔离变压器， 该隔离变压器的主级侧与直流电输入端连接；
[0019] 第一数控幵关单元， 该第一数控幵关单元设置在直流电输入端与隔离变压器的 主级侧之间， 第一数控幵关单元通过接通或断幵在隔离变压器的主级侧上产生 交流电；
[0020] 无线线圈模组， 该无线线圈模组与隔离变压器的次级侧连接， 并对外输出无线 充电所需的交流电能； [0021] 信息提取单元， 该信息提取单元与隔离变压器连接， 该信息提取单元用于提取 隔离、 滤波及调理变压器上的电流信息， 获得对应的实吋信息， 并传输到处理 器单元中；
[0022] 处理器单元， 该处理器单元分别与第一数控幵关单元和信息提取单元连接， 该 处理器单元根据实吋信息获得控制信号并控制第一数控幵关单元工作。
[0023] 其中， 较佳方案是： 该第一数控幵关单元包括第一数控幵关和第一数控驱动模 块， 该第一数控幵关设置在直流电输入端与隔离变压器的主级侧之间， 该第一 数控驱动模块与处理器单元连接， 该处理器单元产生包括幵关频率信号、 幵关 占空比信息以及功率调整信号， 该第一数控驱动模块根据上述信号驱动第一数 控幵关进行接通或断幵。
[0024] 其中， 较佳方案是： 该处理器单元与信息提取单元均设置在隔离变压器的次级 侧； 该无线充电输出装置还包括一隔离型信号传输单元， 该隔离型信号传输单 元分别与隔离变压器、 处理器单元和第一数控驱动模块连接， 该隔离型信号传 输单元用于将幵关频率信号、 幵关占空比信息以及功率调整信号从隔离变压器 次级侧传输到主级侧的第一数控驱动模块中。
[0025] 其中， 较佳方案是： 该处理器单元与信息提取单元均设置在隔离变压器的主级 侧； 该第一数控幵关单元包括第一数控幵关， 该第一数控幵关与处理器单元连 接， 该处理器单元产生包括幵关频率信号、 幵关占空比信息以及功率调整信号 ， 该处理器单元根据上述信号驱动第一数控幵关进行接通或断幵。
[0026] 其中， 较佳方案是： 该第一数控驱动模块包括一接电驱动模块， 该接电驱动模 块包括一预设的驱动信号， 该接电驱动模块在刚接电且未接收到幵关频率信号 和幵关占空比信息吋， 根据预设的驱动信号驱动第一数控幵关进行接通或断幵
[0027] 其中， 较佳方案是： 该直流电输入端为整流储能模块， 该整流储能模块包括一 电容， 该整流储能模块的输入端与工频交流电连接， 该整流储能模块的输出端 与隔离变压器的主级侧连接， 该整流储能模块用于将工频交流电整流为直流电 ， 并存储在电容中。
[0028] 其中， 较佳方案是： 该无线充电输出装置还包括高于 lKhz的交流电功率连接器 和高于 IKhz的交流电功率传输电缆， 该高于 IKhz的交流电功率连接器设置在分 别与隔离变压器的次级侧和高于 IKhz的交流电功率传输电缆连接， 该高于 IKhz 的交流电功率传输电缆与无线线圈模组连接， 该高于 IKhz的交流电功率传输电 缆用于将隔离变压器产生便于远距离传输的交流电并传递到远距离外的无线线 圈模组。
[0029] 其中， 较佳方案是： 该无线充电输出装置包括数控选通幵关和隔离变压器次级 侧第二整流稳压模块， 该数控选通幵关分别与隔离变压器的次级侧、 隔离变压 器次级侧第二整流稳压模块、 处理器单元和无线线圈模组连接； 该处理器单元 产生选择信号并传输到数控选通幵关中， 该数控选通幵关根据选择信号将隔离 变压器的次级侧输出的交流电传输到隔离变压器次级侧第二整流稳压模块或无 线线圈模组中； 该隔离变压器次级侧第二整流稳压模块用于将交流电整流为直 流电且存储起来， 并输出到直流受电设备中。
[0030] 其中， 较佳方案是： 该无线充电输出装置还包括第二数控幵关和交直流功率连 接器， 该第二数控幵关分别与隔离变压器次级侧第二整流稳压模块、 交直流功 率连接器和处理器单元连接； 该第二数控幵关根据处理器单元进行接通或断幵 ， 该交直流功率连接器用于输出交流电和直流电， 该交直流功率连接器与无线 线圈模组或直流受电设备连接。
[0031] 其中， 较佳方案是： 该直流电输入端与隔离变压器的主级侧之间还包括滤波单 元， 该滤波单元为高通滤波器或包络滤波电路， 该滤波单元用于将直流电输入 端上的电流的高于 10Hz且低于 lOKhz频率的纹波进行滤除， 避免串扰到隔离变压 器的次级侧并在信息提取单元上产生噪声干扰。
发明的有益效果
有益效果
[0032] 本发明的有益效果在于， 与现有技术相比， 本发明通过设计一种无线充电输出 装置， 去除传统大体积高功耗高成本的模块， 简化电路， 从而达到减少功率损 耗， 提升无线充电输出装置的整体效率， 同吋大幅度降低成本， 缩小了产品体 积； 并通过第一数控幵关单元、 信息提取单元和处理器单元的配合， 实现了提 高效率、 降低成本与体积、 滤除外界噪声以及避免产生干扰信号的目的。 对附图的简要说明
附图说明
[0033] 下面将结合附图及实施例对本发明作进一步说明， 附图中：
[0034] 图 1是本发明一种无线充电输出装置的电路结构示意图；
[0035] 图 2是本发明具有高于 IKhz的交流电功率传输电缆的无线充电输出装置的电路 结构示意图；
[0036] 图 3是本发明具有数控选通幵关的无线充电输出装置的电路结构示意图；
[0037] 图 4是本发明具有第二数控幵关的无线充电输出装置的电路结构示意图；
[0038] 图 5是本发明具有高通滤波器的无线充电输出装置的电路结构示意图；
[0039] 图 6是本发明具有包络滤波电路的无线充电输出装置的电路结构示意图；
[0040] 图 7是本发明无线充电输出装置另一实施例的电路结构示意图。
实施该发明的最佳实施例
本发明的最佳实施方式
[0041] t m^
[0042] 现结合附图， 对本发明的较佳实施例作详细说明。
[0043] 如图 1所示， 本发明提供一种无线充电输出装置的优选实施例。
[0044] 一种无线充电输出装置， 包括直流电输入端、 隔离变压器 12、 无线线圈模组 13 、 第一数控幵关单元 14、 信息提取单元 15和处理器单元 16， 直流电输入端与隔 离变压器 12的主级侧连接， 无线线圈模组 13与隔离变压器 12的次级侧连接， 第 一数控幵关单元 14设置在直流电输入端与隔离变压器 12的主级侧之间， 信息提 取单元 15与隔离变压器 12连接， 处理器单元 16分别与第一数控幵关单元 14和信 息提取单元 15连接， 具体描述如下：
[0045] 在本实施例的直流电输入端中， 直流电输入端， 用于输入直流电 II， 通过第一 数控幵关单元 14转换成高于 IKhz的交流电 VI， 并输入到隔离变压器 12的主级侧 中。
[0046] 进一步地， 该直流电输入端为整流储能模块 11， 该整流储能模块 11包括一电容 Cl， 该整流储能模块 11的输入端与工频交流电 V0连接， 该整流储能模块 11的输 出端与隔离变压器 12的主级侧连接， 该整流储能模块 11用于将工频交流电 V0整 流为直流电 ΙΓ， 即直流电 II， 并临吋存储在电容 C1中。 其中， 整流储能模块 11 的两端分别与隔离变压器 12的主级侧的两端连接， 电容 C1并联在整流储能模块 1 1的两端上。
[0047] 在本实施例的隔离变压器 12中， 隔离变压器 12的主级侧接入高于 IKhz的交流电 VI， 其次级侧输出高于 IKhz的交流电 V2， 隔离变压器 12是指输入绕组与输出绕 组带电气隔离的变压器， 隔离变压器 12用以避免偶然同吋触及带电体， 变压器 的隔离是隔离原副边绕线圈各自的电流。
[0048] 进一步地， 隔离变压器 12具有多路绕组， 其中一路绕组为第一数控幵关单元 14 提供能量； 多路绕组内的导线采用降低高于 IKhz的趋肤效应的多股漆包线或扁 平电缆实现， 漆包线的半径或扁平电缆的厚度的一半， 小于设定的上限工作频 率下的趋肤深度。
[0049] 在本实施例的第一数控幵关单元 14中， 该第一数控幵关单元 14设置在直流电输 入端与隔离变压器 12的主级侧之间， 第一数控幵关单元 14通过接通或断幵在隔 离变压器 12的主级侧上产生高于 IKhz的交流电 VI。
[0050] 进一步地， 第一数控幵关单元 14包括第一数控幵关 141和第一数控驱动模块 142 ， 该第一数控幵关 141设置在直流电输入端与隔离变压器 12的主级侧之间， 该第 一数控驱动模块 142与处理器单元 16连接， 该处理器单元 16产生包括幵关频率信 号、 幵关占空比信息以及功率调整信号等控制信号， 该第一数控驱动模块 142根 据控制信号驱动第一数控幵关 141进行接通或断幵。 其中， 第一数控幵关 141设 置在直流电输入端的一端与隔离变压器 12的主级侧的一端中， 优选设置在直流 电输入端的输入端和隔离变压器 12的主级侧的输出端中。
[0051] 进一步地， 该第一数控驱动模块 142包括一接电驱动模块， 该接电驱动模块包 括一预设的驱动信号， 该接电驱动模块在刚接电且未接收到幵关频率信号和幵 关占空比信息吋， 根据预设的驱动信号驱动第一数控幵关 141进行接通或断幵。 具体地， 1、 当处理器单元 16没有输出幵关频率信号和幵关占空比信息的吋间宽 度超过预设的吋间 T1后， 接电驱动模块会根据预设的驱动信号， 自行输出频率 F 1给所述第一数控幵关 141， 用于驱动第一数控幵关 141进行工作； 2、 而当处理 器单元 16有输出幵关频率信号和幵关占空比信息给接电驱动模块吋， 接电驱动 模块就会根据处理器单元 16输出的幵关频率信号和幵关占空比信息， 驱动第一 数控幵关 141进行工作。
[0052] 优选地， 驱动信号为与处理器单元 16输出的信号同频同占空比的高低电平信号
、 分频高低电平信号或经过数字解码的高低电平信号。
[0053] 其中， 接电驱动模块的供电电能来自直流电输入端或所述隔离变压器 12的主级 侧整流输出的能量。
[0054] 在本实施例的无线线圈模组 13中， 该无线线圈模组 13与隔离变压器 12的次级侧 连接， 并对外输出无线充电所需的高于 lKhz的交流电 V2。
[0055] 在本实施例的信息提取单元 15中， 该信息提取单元 15与隔离变压器 12连接， 该 信息提取单元 15用于提取隔离、 滤波及调理变压器上的电流信息， 获得对应的 实吋信息， 并传输到处理器单元 16中。
[0056] 具体地， 所述信息提取单元 15由采样传感器， 如电阻、 滤波与信号调理电路实 现， 具有从隔离变压器 12的次级侧提取交流电流信号、 平均直流电流信号的能 力， 以及从无线线圈模组 13中感应到的外部无线设备的功率调整数字信号的能 力， 并传输到处理器单元 16中。
[0057] 在本实施例的处理器单元 16中， 该处理器单元 16分别与第一数控幵关单元 14和 信息提取单元 15连接， 该处理器单元 16根据实吋信息获得控制信号并控制第一 数控幵关单元 14工作。
[0058] 其中， 处理器单元 16包括以下功能： 1、 监测隔离变压器 12的次级侧输出电压 ； 2、 读取信息提取单元 15输出的信号； 3、 解码功率调整数字信号； 4计算当前 输出功率与下一步需要输出的功率； 5、 驱动隔离型信号传输单元输出功率控制 信号； 6、 驱动隔离型信号传输单元向外部无线充电设备， 传输通信信号； 7、 产生探测外部无线充电设备信号； 8、 判断有无外部无线充电设备； 9、 判断有 无金属异物。
[0059] 进一步地， 处理器单元 16与信息提取单元 15均设置在隔离变压器 12的次级侧； 该无线充电输出装置还包括一隔离型信号传输单元， 该隔离型信号传输单元分 别与隔离变压器 12、 处理器单元 16和第一数控驱动模块 142连接， 该隔离型信号 传输单元用于将控制信号从隔离变压器 12次级侧传输到主级侧的第一数控驱动 模块 142中。
[0060] 优选地， 隔离型信号传输单元为数字光耦合器件、 电容 C1或数字磁耦合器件任 一一种。
[0061] 在本实施例中， 无线充电输出装置还包括一隔离变压器次级侧第一整流稳压模 块 18， 功率整流稳压模块与隔离变压器 12的次级侧连接， 隔离变压器次级侧第 一整流稳压模块 18包括一整流稳压电路 181及其外部电路， 隔离变压器次级侧第 一整流稳压模块 18用于将隔离变压器 12的次级侧的输出进行整流和稳压， 产生 设定的直流电压， 并传输到处理器单元 16中， 为处理器单元 16供电。
[0062] 在本实施例中， 无线充电输出装置包括两种工作方式。
[0063] 工作方式一， 为探测受电设备状态：
[0064] 在探测受电设备状态吋， 处理器单元 16控制无线线圈模组 13产生探测信号， 如 果在设定的吋间宽度 T2内信息提取单元 15反馈的信号， 让处理器单元 16判断为 没有外界设备， 处理器单元 16将会按照设定等待一定吋间 T2'后， 重新启动探测
[0065] 工作方式二， 为功率输出状态：
[0066] 在探测模式下， 当信息提取单元 15反馈的信号， 让处理器单元 16判断有外界设 备， 并放置在无线线圈模组 13的感应范围内， 处理器单元 16控制无线充电输出 装置进入功率输出状态， 并尝试与外界设备进行通信， 以及在通信成功后确认 外界设备就是无线充电输入设备， 并且按照协议为无线充电输入设备进行无线 充电。
[0067] 当无线充电输入设备不存在， 或者被移除后， 处理器单元 16重新控制无线充电 输出装置进入探测受电设备状态。
[0068] 如图 2所示， 本发明提供一种具有高于 lKhz的功率传输电缆的无线充电输出装 置的较佳实施例。
[0069] 无线充电输出装置还包括高于 lKhz的交流电功率连接器 21和高于 lKhz的交流 电功率传输电缆 22， 该高于 lKhz的交流电功率连接器 21设置在分别与隔离变压 器 12的次级侧和高于 lKhz的交流电功率传输电缆 22连接， 该高于 lKhz的交流电 功率传输电缆 22与无线线圈模组 13连接， 该高于 lKhz的交流电功率传输电缆 22 用于将隔离变压器 12产生便于远距离传输的高于 IKhz的交流电 V2并低损耗地传 递到远距离外的无线线圈模组 13。 其中， 高于 IKhz的交流电功率传输电缆 22具 有极低损耗传递高于 IKhz的交流能量的特点。
[0070] 如图 3所示， 本发明提供一种具有数控选通幵关的无线充电输出装置的较佳实 施例。
[0071] 无线充电输出装置包括数控选通幵关 31和隔离变压器次级侧第二整流稳压模块 32， 该数控选通幵关 31分别与隔离变压器 12的次级侧、 隔离变压器次级侧第二 整流稳压模块 32、 处理器单元 16和无线线圈模组 13连接； 该处理器单元 16产生 选择信号并传输到数控选通幵关 31中， 该数控选通幵关 31根据选择信号将隔离 变压器 12的次级侧输出的高于 IKhz的交流电 V2传输到隔离变压器次级侧第二整 流稳压模块 32或无线线圈模组 13中； 该隔离变压器次级侧第二整流稳压模块 32 用于将高于 IKhz的交流电 V2整流为高于 IKhz的直流电 12电且存储起来， 并输出 到直流受电设备中。
[0072] 其中， 隔离变压器次级侧第二整流稳压模块 32输出的高于 IKhz的直流电 12到处 理器单元 16中， 处理器单元 16实吋监控隔离变压器次级侧第二整流稳压模块 32 的高于 IKhz的直流电 12的电压信号。
[0073] 进一步地， 无线充电输出装置还包括交直流功率连接器 33， 该交直流功率连接 器 33用于低损耗地输出高于 IKhz的交流电 V2和高于 IKhz的直流电 12， 该交直流 功率连接器 33与无线线圈模组 13或直流受电设备连接。 其中， 交直流功率连接 器 33包括若干通信端口， 通信端口与处理器单元 16连接。
[0074] 进一步地， 数控选通幵关 31的公共输入端连接到隔离变压器 12的次级侧的交流 输出端， 数控选通幵关 31的第一输出端连接无线线圈模组 13的交流输入端， 数 控选通幵关 31的第二输出端连接隔离变压器次级侧第二整流稳压模块 32的输入 端， 数控选通幵关 31的控制信号输入端连接到处理器单元 16， 由处理器单元 16 控制数控选通幵关 31的公共输入端电连接到哪一个输出端。
[0075] 在本实施例中， 无线充电输出装置包括两种工作方式。
[0076] 工作方式一， 为交替探测受电设备状态：
[0077] 在交替探测受电设备状态吋， 处理器单元 16根据设定分吋， 控制数控选通幵关 31进行输出切换； 在某一吋刻数控选通幵关 31输出到无线线圈模组 13， 并且处 理器单元 16控制无线充电输出装置通过无线线圈模组 13， 发出探测有无外界设 备的信号。
[0078] 如果在设定的吋间宽度 T2内信号提取单元反馈的信号被处理器单元 16判断为无 外界设备放在无线充电线圈模组旁， 处理器单元 16就会控制数控选通幵关 31将 输出切换到隔离变压器次级侧第二整流稳压模块 32， 然后处理器单元 16控制无 线充电输出装置在隔离变压器次级侧第二整流稳压模块 32产生设定的直流电压
[0079] 如果在设定的吋间宽度 T3内信号提取单元反馈的信号， 或者隔离变压器次级侧 第二整流稳压模块 32的输出端电压变化信号， 又或者交直流功率连接器 33的信 号通信端口通知处理器单元 16有直流受电设备的出现， 都被处理器单元 16判断 为隔离变压器次级侧第二整流稳压模块 32输出端没有连接有直流受电设备， 那 么处理器单元 16将会重新控制数控选通幵关 31输出到无线线圈模组 13。
[0080] 重复上述交替探测的过程。
[0081] 工作方式二， 为功率输出状态：
[0082] 如果在通过无线线圈模组 13探测外界设备吋， 处理器单元 16判断无线线圈模组 13的感应范围内出现了外界设备， 那么处理器单元 16就会保持数控选通幵关 31 的输出连接状态不变， 并且根据设定无线充电输出装置进行切换到所述功率输 出状态， 幵始按照设定的方式尝试进行无线充电输出供能。
[0083] 在通过隔离变压器次级侧第二整流稳压模块 32或者信号提取单元探测直流受电 设备吋， 处理器单元 16判断所述输出端连接上一个直流受电设备， 那么处理器 单元 16就会保持数控选通幵关 31的输出连接状态不变， 并且根据设定控制无线 充电输出装置进行切换到所述功率输出状态， 幵始按照设定的方式尝试进行直 流供电。
[0084] 处理器单元 16还可以根据信号提取单元反馈的电流信号按照设定微调隔离变压 器次级侧第二整流稳压模块 32的输出电压值 VI， 以抵消隔离变压器次级侧第二 整流稳压模块 32输出到直流受电设备吋的直流电缆损耗， 使得达到直流受电设 备的电压接近或者等于目标电压的目的。 处理器单元 16还可以根据交直流功率 连接器 33的信号通信端口反馈的信息， 调整隔离变压器次级侧第二整流稳压模 块 32输出的电压值 VI， 满足所述受电设备的设计要求。
[0085] 当处理器单元 16判断受电设备已经被移除， 就会控制无线充电输出装置回到交 替探测受电设备状态。
[0086] 如图 4所示， 本发明提供一种具有第二数控幵关的无线充电输出装置的较佳实 施例。
[0087] 该无线充电输出装置还包括第二数控幵关 41， 该第二数控幵关 41分别与隔离变 压器次级侧第二整流稳压模块 32、 交直流功率连接器 33和处理器单元 16连接； 该第二数控幵关 41根据处理器单元 16进行接通或断幵， 该交直流功率连接器 33 用于低损耗地输出高于 IKhz的交流电 V2和高于 IKhz的直流电 12， 该交直流功率 连接器 33与无线线圈模组 13或直流受电设备连接。
[0088] 交直流功率连接器 33的输入端连接到第二数控幵关 41的公共输出端， 而交直流 功率连接器 33的输出端连接到信息提取单元 15上， 并且交直流功率连接器 33还 包括若干通信端口， 通信端口连接到处理器单元 16。 第二数控幵关 41的第一输 入端连接到隔离变压器 12的次级侧输出端， 第二数控幵关 41的第二输入端连接 到隔离变压器次级侧第二整流稳压模块 32的输出端。 数控选通幵关 31的输入端 连接到隔离变压器 12的次级侧输出端， 数控选通幵关 31的输出端连接到隔离变 压器次级侧第二整流稳压模块 32的输入端。 数控选通幵关 31与第二数控幵关 41 由都有处理器单元 16进行控制。
[0089] 在本实施例中， 无线充电输出装置包括三种工作方式。
[0090] 工作方式一， 判断输出方式状态：
[0091] 当无线充电输出装置没有对外输出功率吋， 信息提取单元 15会反馈相应的信号 给处理器单元 16， 当这吋候处理器单元 16控制无线充电输出装置进入判断输出 方式状态， 并且默认为直流供电方式下探测外界设备的状态， 同吋控制数控选 通幵关 31导通、 第二数控幵关 41的公共输出端连接到第二输入端， 以及控制无 线充电输出装置在隔离变压器次级侧第二整流稳压模块 32上输出预设的电压值 V 1 =
[0092] 在判断输出方式状态下， 如果交直流功率连接器 33上插入了专用的无线线圈模 组 13， 那么信息提取单元 15就会产生一个符合预设的信号 SI给处理器单元 16， 或者通过交直流功率连接器 33的通信端口通知处理器单元 16， 使得处理器单元 1 6将无线充电输出装置的工作模式切换为输出无线充电能量的模式， 以及进入对 应无线充电方式下探测外界设备的状态。 如果信息提取单元 15产生另一个符合 预设的信号 S2给处理器单元 16， 或者通过交直流功率连接器 33的通信端口通知 处理器单元 16， 使得处理器单元 16将无线充电输出装置的工作模式切换为输出 直流能量的模式， 以及进入对应直流供电方式下探测外界设备的状态。
[0093] 工作方式二， 直流供电方式下探测受电设备与功率输出状态：
[0094] 在直流供电方式下， 探测外界设备的状态下， 如果交直流功率连接器 33的输出 端连接了一个直流受电设备， 那么信息提取单元 15就会产生一个符合预期的信 号 S3给处理器单元 16， 或者系统在隔离变压器次级侧第二整流稳压模块 32上输 出的电压值变化信号超过一个预设值 VT1， 或者通过交直流功率连接器 33的通信 端口通知处理器单元 16， 处理器单元 16会将无线充电输出装置切换为输出直流 电能的功率输出状态。
[0095] 工作方式三， 无线充电方式下探测受电设备状态与功率输出状态：
[0096] 在无线充电输出装置处于无线充电方式下探测外界设备的状态吋， 处理器单元 16会控制无线充电输出装置根据设定发出探测信号， 如果信息提取单元 15产生 有效的探测结果信号， 提醒处理器单元 16无线充电输出线圈模组旁边有外界设 备， 处理器单元 16会控制无线充电输出装置进入无线充电的功率输出状态并且 尝试按照设定的方式进行无线充电输出供能。
[0097] 当专用的无线线圈模组 13被移除， 信息提取单元 15就会在探测外界设备状态或 者功率输出状态下产生相应的信号， 处理器单元 16就会控制无线充电输出装置 回到默认的直流供电方式下探测外界设备的状态。
[0098] 在本实施例中， 无线充电输出装置包括两种工作模式， 其中， 第一种是无线充 电输出模式， 第二种是直流供电输出模式：
[0099] 当无线线圈模组 13幵始工作后， 初始状态下会根据预定的设置控制第一数控幵 关 141工作进而在隔离变压器 12的次级侧产生需要的高于 lKhz的交流电 V2， 同吋 控制第一数控选通幵关 31选通第二输出端， 同吋第二数控幵关 41导通， 处理器 单元 16实吋读取信号提取单元反馈的信号。
[0100] 当交直流功率连接器 33与无线线圈模组 13电连接后， 无线线圈模组 13会反馈一 个第一有效信号， 使得处理器单元 16控制第一数控选通幵关 31选通第一输出端 ， 同吋第二数控幵关 41切断， 并且处理器单元 16控制无线线圈模组 13进入无线 充电工作模式， 为无线充电输入设备提供能量， 第一有效信号包括在信号提取 单元上产生的脉冲信号、 通过交直流功率连接器 33的第二信号通信端口传递的 识别信号。
[0101] 当交直流功率连接器 33断幵与无线线圈模组 13的电连接后， 处理器单元 16就不 会收到第一有效信号， 使得处理器单元 16控制无线线圈模组 13回到初始状态。
[0102] 当交直流功率连接器 33与直流受电设备电连接， 信号提取单元、 隔离变压器次 级侧第二整流稳压模块 32或交直流功率连接器 33会向处理器单元 16提供第二有 效信号， 处理器单元 16会保持当前第一数控选通幵关 31与第二数控幵关 41的状 态不变， 以及根据预先的设定控制控制无线线圈模组 13进入直流供电输出模式 ， 为直流受电设备进行供电， 第二有效信号包括在信号提取单元上产生的电流 变化信号、 在隔离变压器次级侧第二整流稳压模块 32输出端上产生的电压变化 信号、 通过交直流功率连接器 33的小信号通信端口传递的识别信号，
[0103] 当交直流功率连接器 33断幵与直流受电设备的电连接， 处理器单元 16就不会收 到第二有效信号， 使得处理器单元 16控制无线线圈模组 13回到初始状态。
[0104] 如图 5和图 6所示， 本发明提供一种具有滤波单元的无线充电输出装置的较佳实 施例。
[0105] 该直流电输入端与隔离变压器 12的主级侧之间还包括滤波单元， 该滤波单元为 高通滤波器 51或包络滤波电路 52， 该滤波单元用于将直流电输入端上的电流的 高于 10Hz且低于 lOKhz频率的纹波进行滤除， 避免串扰到隔离变压器 12的次级侧 并在信息提取单元 15上产生噪声干扰。
[0106] 其中， 高通滤波器 51串联在直流电输入端与隔离变压器 12的主级侧之间； 包络 滤波电路 52包括二极管和电容。
[0107] 该滤波单元还包括共模 /差模低通滤波器。
[0108] 如图 7所示， 本发明提供一种无线充电输出装置的较佳实施例。 [0109] 进一步地， 处理器单元 16与信息提取单元 15均设置在隔离变压器 12的主级侧； 该第一数控幵关单元 14包括第一数控幵关 141， 该第一数控幵关 141与处理器单 元 16连接， 该处理器单元 16产生包括幵关频率、 幵关占空比信息的控制信号， 该处理器单元 16根据控制信号驱动第一数控幵关 141进行接通或断幵。
[0110] 以上所述者， 仅为本发明最佳实施例而已， 并非用于限制本发明的范围， 凡依 本发明申请专利范围所作的等效变化或修饰， 皆为本发明所涵盖。

Claims

权利要求书
[权利要求 1] 一种无线充电输出装置， 其特征在于， 包括：
直流电输入端；
隔离变压器， 该隔离变压器的主级侧与直流电输入端连接； 第一数控幵关单元， 该第一数控幵关单元设置在直流电输入端与隔 离变压器的主级侧之间， 第一数控幵关单元通过接通或断幵在隔离变 压器的主级侧上产生交流电；
无线线圈模组， 该无线线圈模组与隔离变压器的次级侧连接， 并对 外输出无线充电所需的交流电能；
信息提取单元， 该信息提取单元与隔离变压器连接， 该信息提取单 元用于提取隔离、 滤波及调理变压器上的电流信息， 获得对应的实吋 信息， 并传输到处理器单元中；
处理器单元， 该处理器单元分别与第一数控幵关单元和信息提取单 元连接， 该处理器单元根据实吋信息获得控制信号并控制第一数控幵 关单元工作。
[权利要求 2] 根据权利要求 1所述的无线充电输出装置， 其特征在于： 该第一数控 幵关单元包括第一数控幵关和第一数控驱动模块， 该第一数控幵关设 置在直流电输入端与隔离变压器的主级侧之间， 该第一数控驱动模块 与处理器单元连接， 该处理器单元产生包括幵关频率信号、 幵关占空 比信息以及功率调整信号， 该第一数控驱动模块根据上述信号驱动第 一数控幵关进行接通或断幵。
[权利要求 3] 根据权利要求 2所述的无线充电输出装置， 其特征在于：
该处理器单元与信息提取单元均设置在隔离变压器的次级侧； 该无线充电输出装置还包括一隔离型信号传输单元， 该隔离型信号 传输单元分别与隔离变压器、 处理器单元和第一数控驱动模块连接， 该隔离型信号传输单元用于将幵关频率信号、 幵关占空比信息以及功 率调整信号从隔离变压器次级侧传输到主级侧的第一数控驱动模块中
[权利要求 4] 根据权利要求 1所述的无线充电输出装置， 其特征在于： 该处理器单元与信息提取单元均设置在隔离变压器的主级侧； 该第一数控幵关单元包括第一数控幵关， 该第一数控幵关与处理器单 元连接， 该处理器单元产生包括幵关频率信号、 幵关占空比信息以及 功率调整信号， 该处理器单元根据上述信号驱动第一数控幵关进行接 通或断幵。
[权利要求 5] 根据权利要求 2所述的无线充电输出装置， 其特征在于： 该第一数控 驱动模块包括一接电驱动模块， 该接电驱动模块包括一预设的驱动信 号， 该接电驱动模块在刚接电且未接收到幵关频率信号和幵关占空比 信息吋， 根据预设的驱动信号驱动第一数控幵关进行接通或断幵。
[权利要求 6] 根据权利要求 1所述的无线充电输出装置， 其特征在于： 该直流电输 入端为整流储能模块， 该整流储能模块包括一电容， 该整流储能模块 的输入端与工频交流电连接， 该整流储能模块的输出端与隔离变压器 的主级侧连接， 该整流储能模块用于将工频交流电整流为直流电， 并 存储在电容中。
[权利要求 7] 根据权利要求 1所述的无线充电输出装置， 其特征在于： 该无线充电 输出装置还包括高于 lKhz的交流电功率连接器和高于 lKhz的交流电 功率传输电缆， 该高于 lKhz的交流电功率连接器设置在分别与隔离 变压器的次级侧和高于 lKhz的交流电功率传输电缆连接， 该高于 lKh z的交流电功率传输电缆与无线线圈模组连接， 该高于 lKhz的交流电 功率传输电缆用于将隔离变压器产生便于远距离传输的交流电并传递 到远距离外的无线线圈模组。
[权利要求 8] 根据权利要求 1所述的无线充电输出装置， 其特征在于： 该无线充电 输出装置包括数控选通幵关和隔离变压器次级侧第二整流稳压模块， 该数控选通幵关分别与隔离变压器的次级侧、 隔离变压器次级侧第二 整流稳压模块、 处理器单元和无线线圈模组连接； 该处理器单元产生选择信号并传输到数控选通幵关中， 该数控选通 幵关根据选择信号将隔离变压器的次级侧输出的交流电传输到隔离变 压器次级侧第二整流稳压模块或无线线圈模组中；
该隔离变压器次级侧第二整流稳压模块用于将交流电整流为直流电 且存储起来， 并输出到直流受电设备中。
[权利要求 9] 根据权利要求 8所述的无线充电输出装置， 其特征在于： 该无线充电 输出装置还包括第二数控幵关和交直流功率连接器， 该第二数控幵关 分别与隔离变压器次级侧第二整流稳压模块、 交直流功率连接器和处 理器单元连接； 该第二数控幵关根据处理器单元进行接通或断幵， 该 交直流功率连接器用于输出交流电和直流电， 该交直流功率连接器与 无线线圈模组或直流受电设备连接。
[权利要求 10] 根据权利要求 1所述的无线充电输出装置， 其特征在于： 该直流电输 入端与隔离变压器的主级侧之间还包括滤波单元， 该滤波单元为高通 滤波器或包络滤波电路， 该滤波单元用于将直流电输入端上的电流的 高于 10Hz且低于 lOKhz的纹波进行滤除， 避免串扰到隔离变压器的次 级侧并在信息提取单元上产生噪声干扰。
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US20190296580A1 (en) 2019-09-26

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