WO2020125112A1 - 一种接收端的相位校准电路、方法及接收端 - Google Patents
一种接收端的相位校准电路、方法及接收端 Download PDFInfo
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- WO2020125112A1 WO2020125112A1 PCT/CN2019/107419 CN2019107419W WO2020125112A1 WO 2020125112 A1 WO2020125112 A1 WO 2020125112A1 CN 2019107419 W CN2019107419 W CN 2019107419W WO 2020125112 A1 WO2020125112 A1 WO 2020125112A1
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- rectifier
- input current
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- bridge arm
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
- B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
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- 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
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- 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
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/0085—Partially controlled bridges
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/083—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the ignition at the zero crossing of the voltage or the current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33573—Full-bridge at primary side of an isolation transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
- H02M7/2195—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration the switches being synchronously commutated at the same frequency of the AC input voltage
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- 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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33515—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with digital control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33584—Bidirectional converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Definitions
- the invention relates to the technical field of power electronics, in particular to a phase calibration circuit, method and receiving end of a receiving end.
- Electric vehicle battery charging methods usually include: contact charging and wireless charging.
- the contact charging uses the metal contact of the plug and the socket to conduct electricity
- the wireless charging uses the coupled electromagnetic field as a medium to realize the transmission of electrical energy.
- contact charging has many advantages and becomes the mainstream way of charging electric vehicles in the future.
- the wireless charging system has undergone the development process of the untuned method using the DC conversion circuit to adjust the output power, the passive tuning using the inductive and capacitive passive devices to adjust the output power, and the impedance adjustment using the controllable switch tube.
- Impedance adjustment is to control the bridge arm voltage of the rectifier at the receiving end to be synchronized with the input current of the rectifier. Therefore, the phase of the input current of the rectifier needs to be detected. However, since the input current of the rectifier generally has harmonics or interference signals, it is necessary to filter the detected input current. Whether the filtering process is through hardware filtering or software filtering, it will cause the phase after filtering to lag behind the phase before filtering.
- the present invention provides a phase calibration circuit and method at the receiving end and the receiving end, which can compensate for the phase lag caused by the filtering, thereby maintaining the bridge arm voltage of the rectifier and the input current of the rectifier Accurate synchronization.
- an embodiment of the present application provides a phase calibration circuit at a receiving end, including: a phase measurement circuit and a controller; the first input end of the phase measurement circuit is connected to the output end of the current detection circuit, and the second input end of the phase measurement circuit Connect the output of the filter; the current detection circuit detects the input current of the rectifier; the filter filters the input current to obtain the fundamental component of the input current; the phase detection circuit obtains the phase difference between the input current and the fundamental component of the input current; control The converter takes the preset phase shift angle minus the phase difference as the actual phase shift angle, and controls the phase of the bridge arm voltage of the rectifier to lag the actual phase shift angle of the phase of the fundamental component of the input current.
- the phase calibration circuit can compensate for the phase lag caused by the filtering, thereby maintaining accurate synchronization of the bridge arm voltage of the rectifier and the input current of the rectifier.
- the preset phase shift angle of the bridge arm voltage and the input current that need to be controlled theoretically needs to be subtracted from the phase difference caused by the filter delay.
- the controller uses the actual phase shift angle to output the drive signal of the controllable switch tube of the rectifier. Since the lag phase due to filtering is compensated, the accuracy of the bridge arm voltage and input current synchronization can be improved.
- the phase measurement circuit can be digital or analog.
- the phase calibration circuit further includes: a first zero-crossing detector and a second zero-crossing detector; the input end of the first zero-crossing detector is connected to the output end of the filter, The input terminal of the second zero-crossing detector is connected to the output terminal of the current detection circuit; the output terminal of the first zero-crossing detector is connected to the first input terminal of the digital phase detector, and the second The output terminal of the zero detector is connected to the second input terminal of the digital phase detector; the first zero-crossing detector is used to perform a zero-crossing detection on the fundamental component of the input current to obtain a first square wave; A second zero-crossing detector is used to perform a zero-crossing detection on the input current to obtain a second square wave; the digital phase detector is used to obtain the input current according to the first square wave and the second square wave The phase difference with the fundamental component of the input current. .
- the digital phase discriminator can directly obtain the phase difference of two square
- the phase calibration circuit further includes: an analog-to-digital converter; the first input terminal of the analog phase detector is connected to the output terminal of the current detection circuit, and the second of the analog phase detector The input end is connected to the output end of the filter; the analog-to-digital converter is used to perform analog-to-digital conversion on the phase difference output by the analog phase discriminator and convert it into a phase difference in the form of a digital signal. Since the analog phase detector can receive analog signals, it can directly process sinusoidal signals. Therefore, a zero-crossing detector is not required to perform zero-crossing detection to obtain a square wave signal.
- the analog-to-digital converter and the controller are integrated together. That is, the controller can bring its own analog-to-digital converter.
- the rectifier is a full-bridge rectifier, and the full-bridge rectifier includes four controllable switch tubes; the voltage of the bridge arm is between the midpoint of the leading bridge arm and the midpoint of the lagging bridge arm of the full-bridge rectifier. Voltage.
- the rectifier is a half-bridge rectifier, and the half-bridge rectifier includes two controllable switch tubes; the voltage of the bridge arm is the voltage between the midpoint of the bridge arm of the half-bridge rectifier and ground.
- the preset phase shift angle is 0, or the preset phase shift angle is a fixed preset value greater than 0.
- an embodiment of the present application provides a phase calibration method for a receiving end, which is applied to the phase calibration circuit described above, and includes: detecting an input current of a rectifier; filtering the input current of the rectifier to obtain a fundamental component of the input current ; Obtain the phase difference between the input current and the fundamental component of the input current; the preset phase shift angle minus the phase difference as the actual phase shift angle, control the phase of the bridge arm voltage of the rectifier The phase of the fundamental component of the input current lags the actual phase shift angle.
- This method can compensate for the phase lag caused by filtering, thereby keeping the rectifier bridge arm voltage and the rectifier input current accurately synchronized.
- the preset phase shift angle of the bridge arm voltage and the input current that need to be controlled theoretically needs to be subtracted from the phase difference caused by the filter delay.
- the accuracy of the bridge arm voltage and input current synchronization can be improved.
- an embodiment of the present application further provides a receiving end, including: a receiving coil, a rectifier, and the above phase calibration circuit; the receiving coil receives electromagnetic energy emitted by the transmitting coil and outputs alternating current; the rectifier rectifies the alternating current into direct current; phase calibration The circuit calibrates the phase of the bridge arm voltage of the rectifier according to the phase difference between the input current of the rectifier before and after filtering.
- the receiving end can be applied to a wireless charging system, where the wireless charging system can charge an electric vehicle, and the receiving end can be located on the electric vehicle to charge the power battery pack on the electric vehicle.
- the rectifier is a full-bridge rectifier or a half-bridge rectifier.
- the rectifier may include four controllable switch tubes or only two controllable switch tubes.
- both of the included switch tubes are controllable switch tubes.
- the present invention has at least the following advantages:
- the controller uses the actual phase shift angle to output the drive signal of the controllable switch tube of the rectifier. Since the lag phase due to filtering is compensated, the accuracy of the bridge arm voltage and input current synchronization can be improved.
- Figure 1 is an equivalent circuit diagram of a wireless charging system
- FIG. 2 is a schematic diagram of a phase calibration circuit provided by an embodiment of the present application.
- phase calibration circuit 3 is a schematic diagram of another phase calibration circuit provided by an embodiment of the present application.
- phase calibration circuit 4 is a schematic diagram of another phase calibration circuit provided by an embodiment of the present application.
- FIG. 5 is a schematic diagram of yet another phase calibration circuit provided by an embodiment of the present application.
- FIG. 6 is a waveform diagram of a phase calibration provided by an embodiment of the present application.
- FIG. 7 is a schematic diagram of a full bridge provided by an embodiment of the present application.
- FIG. 8 is another schematic diagram of the rectifier provided by the embodiment of the present application as a full bridge
- FIG. 9 is a schematic diagram of a half-bridge rectifier provided by an embodiment of the present application.
- FIG. 11 is a schematic diagram of a wireless charging system provided by an embodiment of the present application.
- FIG. 1 is an equivalent circuit diagram of a wireless charging system.
- the wireless charging system includes a transmitting end and a receiving end, wherein the transmitting end includes: an inverter, a compensation circuit 100, and a transmitting coil Ct, wherein the inverter includes four switching tubes Q1-Q4.
- the receiving end includes: a receiving coil Cr, a compensation circuit 200 and a rectifier, and the rectifier includes four switch tubes S1-S4.
- the electromagnetic energy is transmitted between the transmitting end and the receiving end by wireless, that is, the transmitting end emits electromagnetic energy, and the receiving end receives the electromagnetic energy emitted by the transmitting end through wireless communication.
- the rectifier can be a full-bridge rectifier or a half-bridge rectifier.
- Figure 1 shows a full-bridge rectifier, which includes four switch tubes.
- the bridge arm voltage of the rectifier refers to the midpoint between the two bridge arms of the rectifier. Voltage, which is U2 in the figure.
- the bridge arm voltage refers to the voltage between the bridge arm midpoint and ground.
- the voltage of the bridge arm of the rectifier and the input current of the rectifier are synchronized to mean that the period and frequency of the two are the same.
- the two can maintain a fixed phase difference, and the fixed phase difference can be 0 or a preset fixed value greater than 0.
- the phase of the input current of the rectifier needs to be obtained, and then the period of the input current is obtained, so that the bridge arm voltage follows the period of the input current.
- the detected input current needs to be filtered. Whether the filtering process is through hardware filtering or software filtering, it will cause the phase after filtering to lag behind the phase before filtering.
- the phase calibration circuit, method, and system can compensate for the phase lag caused by the filtering, thereby maintaining accurate synchronization between the bridge arm voltage of the rectifier and the input current of the rectifier.
- the phase of the bridge arm voltage can also be the same as the phase of the input current . Therefore, when controlling the phase of the bridge arm voltage based on the phase of the input current, it is necessary to subtract the phase difference caused by the filter delay from the preset phase shift angle of the bridge arm voltage and the input current that need to be controlled in theory. In order to achieve compensation for the phase difference caused by filtering.
- FIG. 2 is a schematic diagram of a phase calibration circuit provided by an embodiment of the present application.
- the rectifier is a full-bridge rectifier as an example. As shown in FIG. 2, the rectifier includes controllable switch tubes S1-S4. The bridge arm voltage of the rectifier is U2.
- the impedance adjustment phase calibration circuit includes: a phase measurement circuit 300 and a controller 400;
- the first input terminal of the phase measurement circuit 300 is connected to the output terminal of the current detection circuit 500, and the second input terminal of the phase measurement circuit 300 is connected to the output terminal of the filter 600;
- the current detection circuit 500 detects the input current of the rectifier
- the specific implementation manner of the current detection circuit 500 is not limited in the embodiments of the present application, and may be, for example:
- the filter 600 filters the input current to obtain a fundamental component of the input current
- the function of the filter 600 is mainly to filter out higher harmonics in the input current, and retain the fundamental component of the input current.
- the filter 600 can use a relatively mature filter circuit.
- the phase detection circuit 300 obtains the phase difference between the input current and the fundamental component of the input current.
- the phase detection circuit 300 may be implemented using a phase discriminator or a circuit constructed by basic circuit devices, and its main function is to obtain a phase difference between two input signals.
- the controller 400 takes the preset phase shift angle minus the phase difference as the actual phase shift angle, and controls the phase of the bridge arm voltage of the rectifier to lag the actual phase shift angle from the phase of the input current fundamental component .
- the preset phase shift angle is represented by ⁇
- the phase difference is represented by ⁇ .
- the controller needs to compensate for the phase difference caused by the delay when generating the drive signal of the controllable switch of the rectifier.
- the bridge arm voltage of the rectifier is synchronized with the input current of the rectifier, which means that it is synchronized with the input current before filtering.
- the input current of the rectifier is a sinusoidal signal containing harmonics before filtering, and becomes a sinusoidal signal after filtering, but the phase of the filtered sinusoidal signal lags the phase difference ⁇ before the filtered sinusoidal signal.
- the preset phase shift angle of the bridge arm voltage of the rectifier and the input current of the rectifier is ⁇ , it is actually necessary to control the phase shift angle of the bridge arm voltage to the fundamental component of the input current to be ⁇ - ⁇ .
- the preset phase shift angle ⁇ is a preset value, which can be 0 or a fixed preset value.
- the calibration circuit provided in this embodiment obtains the input current of the rectifier before filtering and the input current before and after filtering, thereby obtaining the phase difference between the input current before and after filtering. Since the phase difference is caused by the filtering process, it needs to be followed up Control to compensate for this phase difference.
- the controller takes the preset phase shift angle minus the phase difference as the actual phase shift angle, and controls the phase of the bridge arm voltage of the rectifier to lag the actual phase of the input current fundamental component by the actual phase shift angle. Phase shift angle.
- the controller uses the actual phase shift angle to output the drive signal of the controllable switch tube of the rectifier. Since the lag phase due to filtering is compensated, the accuracy of the bridge arm voltage and input current synchronization can be improved.
- FIG. 3 is a schematic diagram of another phase calibration circuit provided by an embodiment of the present application.
- the phase measurement circuit may be a digital phase detector 301;
- the phase calibration circuit further includes: a first zero-crossing detector 700 and a second zero-crossing detector 800;
- the input terminal of the first zero-crossing detector 700 is connected to the output terminal of the filter 600, and the input terminal of the second zero-crossing detector 800 is connected to the output terminal of the current detection circuit 500; the first zero-crossing detection The output terminal of the detector 700 is connected to the first input terminal of the digital phase detector 301, and the output terminal of the second zero-crossing detector 800 is connected to the second input terminal of the digital phase detector 301;
- a first zero-crossing detector 700 configured to perform a zero-crossing detection on the fundamental component of the input current to obtain a first square wave
- the second zero-crossing detector 800 is used for performing zero-crossing detection on the input current to obtain a second square wave.
- the current detection circuit 500 outputs a sinusoidal signal with harmonics, and the filter 600 outputs a sinusoidal signal.
- the digital phase detector 301 can only process digital signals. Therefore, the analog signal corresponding to the sinusoidal signal needs to be converted into a digital signal. Therefore, in the embodiment of the present application, a zero-crossing detector is used to convert the sinusoidal signal It is a square wave signal with the same phase and the same period. Since the square wave signal is a digital signal, it can be directly processed by the digital phase detector 301.
- the digital phase detector 301 is configured to obtain the phase difference between the input current and the fundamental component of the input current according to the first square wave and the second square wave.
- the digital phase detector 301 can obtain the phase difference between the two square wave signals, which is the phase difference of the input current caused by the filter.
- the digital phase detector 301 is used to obtain the phase difference before and after filtering. Since the signal received by the digital phase detector 301 needs to be a digital signal and cannot process analog signals, the first zero-crossing detector 700 and The second zero-crossing detector 800 performs zero-crossing detection respectively and converts the sinusoidal signal into a square wave signal.
- the digital phase detector 301 can directly obtain the phase difference of the two square wave signals, that is, obtain the phase difference in the form of a digital signal, and send it directly to the controller 400.
- the controller 400 can directly process the digital signal, saving resources of the controller 400.
- phase measurement circuit As a digital phase discriminator as an example.
- phase measurement circuit as an analog phase discriminator.
- FIG. 4 is a schematic diagram of another phase calibration circuit provided by an embodiment of the present application.
- the phase measurement circuit is an analog phase detector 302;
- the phase calibration circuit further includes: an analog-to-digital converter 401;
- the first input terminal of the analog phase detector 302 is connected to the output terminal of the current detection circuit 500, and the second input terminal of the analog phase detector 302 is connected to the output terminal of the filter 600;
- the analog-to-digital converter 401 is configured to perform analog-to-digital conversion on the phase difference output by the analog phase detector 302, and convert the phase difference converted into a digital signal to the controller 400.
- the controller 400 processes the phase difference in the form of the digital signal.
- the phase calibration circuit uses the analog phase detector 302 to obtain the phase difference of the input current before and after filtering. Since the analog phase detector 302 can receive analog signals, it can directly process sinusoidal signals. Therefore, a zero-crossing detector is not required to perform zero-crossing detection to obtain a square wave signal. Since the phase difference output by the analog phase detector 302 is in the form of an analog signal, the analog-to-digital converter needs to convert the phase difference in the form of a digital signal before the controller 400 can directly process it.
- analog-to-digital converter 401 may be integrated with the controller 400, that is, the analog-to-digital converter 401 is integrated inside the controller 400.
- the analog-to-digital converter 401 is integrated inside the controller 400.
- FIG. 6 is a phase calibration waveform diagram provided by an embodiment of the present application.
- the waveform of the input current i of the rectifier corresponds to the waveform before and after filtering, which are both sine waves, where the solid line represents the input current before filtering, and the dotted line represents the input current after filtering.
- the square wave output by the first zero-crossing detector corresponds to the square wave signal obtained by zero-crossing detection of the sine signal before i-filtering
- the square wave output by the second zero-crossing detector corresponds to the square wave signal after i-filtering of the sine signal.
- the square wave signal obtained by zero detection corresponds to the square wave signal obtained by zero detection.
- phase difference of the phase lag after i-filtering before i-filtering is ⁇ , that is, the phase difference of the signals output by the first zero-crossing detector and the second zero-crossing detector is ⁇ .
- phase shift angle of the bridge arm voltage and input current is expected to be the preset phase shift angle ⁇
- the bridge arm voltage is controlled to lag the filtered input current fundamental wave phase by ⁇
- the phase difference of the obtained bridge arm voltage from the actual input current fundamental wave component is ⁇ + ⁇ . Therefore, in order to obtain the phase shift angle of the bridge arm voltage and the phase of the fundamental component of the input current as ⁇ , the phase of the input current before filtering should be used as a reference.
- the phase of the fundamental component of the input current after filtering needs to be compensated Therefore, the preset phase shift angle ⁇ minus the phase difference ⁇ due to filtering needs to be taken as the phase shift angle of the actual control drive signal, so that the actual phase of the bridge arm voltage lags the phase of the actual input current fundamental component by ⁇ .
- the rectifier is a full-bridge rectifier
- the four switch tubes of the full-bridge rectifier are controllable switch tubes.
- the following describes other implementations of the rectifier in conjunction with the drawings.
- the rectifier when it is a full-bridge rectifier, it may include two controllable switch tubes and two diodes. The following is a detailed introduction with reference to the drawings.
- FIG. 7 is a schematic diagram of a rectifier provided by an embodiment of the present application including two controllable switch tubes.
- the two bridge arms of the rectifier include a controllable switch and a diode.
- the leading bridge arm includes a first diode D1 and a first controllable switch S3
- the lagging bridge arm includes a second diode D2 and a second controllable switch D4.
- FIG. 8 is another schematic diagram of a rectifier provided by an embodiment of the present application including two controllable switch tubes.
- the rectifier shown in FIG. 8 also includes two diodes and two controllable switch tubes.
- One bridge arm includes two diodes D1 and D3, and the other bridge arm includes two controllable switch tubes S2 and S4.
- switch tubes on the two bridge arms can exchange positions.
- the above introduces the full-bridge rectifier, and the following introduces the half-bridge rectifier.
- the bridge arm voltage of a full-bridge rectifier refers to the voltage between the midpoints of the two bridge arms.
- the bridge arm voltage of a half-bridge rectifier refers to the voltage between the midpoint of the bridge arm and ground.
- FIG. 9 is a schematic diagram of a half-bridge rectifier provided by an embodiment of the present application.
- Both switch tubes of the half-bridge rectifier are controllable switch tubes, as shown in S1 and S3 in FIG. 9.
- an embodiment of the present application further provides a phase calibration method, which will be described in detail below with reference to the drawings.
- this figure is a flowchart of a phase calibration method of a receiving end provided by an embodiment of the present application.
- phase calibration method provided in this embodiment applied to the phase calibration circuit provided in any of the above embodiments, includes the following steps:
- the type of the current sensor is not specifically limited.
- it may be a Hall sensor or a current transformer.
- S102 Filter the input current of the rectifier to obtain the fundamental component of the input current
- the directly detected input current contains harmonic components, it is necessary to filter out the harmonic components to obtain the fundamental component of the input current, and the subsequent processing object is the fundamental component of the input current.
- the filtering process will cause a phase delay, in order to compensate for the phase difference caused by the delay in subsequent steps, the phase difference needs to be obtained.
- S104 Take the result of subtracting the phase difference from the preset phase shift angle as the actual phase shift angle, and control the phase of the bridge arm voltage of the rectifier to lag the actual phase shift angle from the phase of the fundamental component of the input current.
- the controller takes the preset phase shift angle minus the phase difference as the actual phase shift angle, and controls the phase of the bridge arm voltage of the rectifier to lag the actual phase of the input current fundamental component by the actual phase shift angle. Phase shift angle.
- the controller uses the actual phase shift angle to output the drive signal of the controllable switch tube of the rectifier. Since the lag phase due to filtering is compensated, the accuracy of the bridge arm voltage and input current synchronization can be improved.
- embodiments of the present application also provide a receiving end of a wireless charging system, which will be described in detail below with reference to the drawings.
- FIG. 11 is a schematic diagram of a wireless charging system provided by an embodiment of the present application.
- the wireless charging system can be applied in various fields that require wireless charging, such as the field of electric vehicles, and the receiving end can be located on the electric vehicle and used as a vehicle-mounted terminal.
- the transmitter of the wireless charging system can be located on the ground, and the transmitter can wirelessly charge the electric vehicle.
- the transmitting coil of the transmitting end transmits an alternating magnetic field
- the receiving coil of the receiving end receives the alternating magnetic field, thereby completing the interaction of electromagnetic energy.
- the wireless charging system provided in this embodiment includes a receiving end and a transmitting end, where the receiving end includes an inverter, a first compensation circuit 100, and a transmitting coil Ct.
- the inverter includes four controllable switch tubes Q1-Q4.
- the receiving end includes: a receiving coil Cr, a second compensation circuit 200, a rectifier, and the phase calibration circuit 1000 described in any of the above embodiments; the rectifier is described by taking a full-bridge rectifier including four controllable switch tubes S1-S4 as an example.
- the receiving coil Cr receives the electromagnetic energy emitted by the transmitting coil Ct and outputs alternating current;
- the rectifier rectifies the alternating current into direct current to supply power to electrical equipment; for example, in the field of electric vehicles, the load of the rectifier may be a power battery on the electric vehicle.
- the phase calibration circuit 1000 can calibrate the phase of the bridge arm voltage of the rectifier according to the phase difference between the input current of the rectifier before and after filtering.
- the rectifier may be a half-bridge rectifier in addition to the full-bridge rectifier shown in FIG. 11.
- the receiving end provided in this embodiment obtains the input current of the rectifier before filtering and the input current before and after filtering, thereby obtaining the phase difference between the input current before and after filtering. Since the phase difference is caused by the filtering process, it needs to be followed up Control to compensate for this phase difference.
- the result of subtracting the phase difference from the preset phase shift angle is used as the actual phase shift angle, and the phase of the bridge arm voltage of the rectifier is controlled to lag behind the phase of the fundamental component of the input current by the actual phase shift angle.
- the controller uses the actual phase shift angle to output the drive signal of the controllable switch tube of the rectifier. Since the lag phase caused by filtering is compensated, the accuracy of the bridge arm voltage of the rectifier and the input current can be improved.
- An embodiment of the present application further provides a wireless charging system including the receiving end described in the above embodiments.
- the wireless charging system can be used in the field of electric vehicles.
- At least one (item) refers to one or more, and “multiple” refers to two or more.
- “And/or” is used to describe the association relationship of related objects, indicating that there can be three kinds of relationships, for example, “A and/or B” can mean: there are only A, only B, and A and B at the same time , Where A and B can be singular or plural.
- the character “/” generally indicates that the related object is a "or” relationship.
- At least one of the following” or a similar expression refers to any combination of these items, including any combination of a single item or a plurality of items.
- At least one (a) of a, b, or c can be expressed as: a, b, c, "a and b", “a and c", “b and c", or "a and b and c" ", where a, b, c can be a single or multiple.
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Abstract
Description
Claims (10)
- 一种接收端的相位校准电路,其特征在于,包括:相位测量电路和控制器;所述相位测量电路的第一输入端连接电流检测电路的输出端,所述相位测量电路的第二输入端连接滤波器的输出端;所述电流检测电路,用于检测整流器的输入电流;所述滤波器,用于对所述输入电流进行滤波,获得输入电流基波分量;所述相位检测电路,用于获得所述输入电流与所述输入电流基波分量之间的相位差;所述控制器,用于将预设移相角减去所述相位差的结果作为实际移相角,控制所述整流器的桥臂电压的相位比所述输入电流基波分量的相位滞后所述实际移相角。
- 根据权利要求1所述的相位校准电路,其特征在于,所述相位测量电路为数字鉴相器;所述相位校准电路还包括:第一过零检测器和第二过零检测器;所述第一过零检测器的输入端连接所述滤波器的输出端,所述第二过零检测器的输入端连接所述电流检测电路的输出端;所述第一过零检测器的输出端连接所述数字鉴相器的第一输入端,所述第二过零检测器的输出端连接所述数字鉴相器的第二输入端;所述第一过零检测器,用于对所述输入电流基波分量进行过零检测获得第一方波;所述第二过零检测器,用于对所述输入电流进行过零检测获得第二方波;所述数字鉴相器,用于根据所述第一方波和第二方波获得所述输入电流与所述输入电流基波分量之间的相位差。
- 根据权利要求1所述的相位校准电路,其特征在于,所述相位测量电路为模拟鉴相器;所述相位校准电路还包括:模数转换器;所述模拟鉴相器的第一输入端连接电流检测电路的输出端,所述模拟鉴相器的第二输入端连接滤波器的输出端;所述模数转换器,用于将所述模拟鉴相器输出的相位差进行模数转换,转换为数字信号形式的相位差。
- 根据权利要求3所述的相位校准电路,其特征在于,所述模数转换器和所述控制器集成在一起。
- 根据权利要求1-4任一项所述的相位校准电路,其特征在于,所述整流器为全桥整流器,所述全桥整流器包括四个可控开关管;所述桥臂电压为所述全桥整流器的超前桥臂中点和滞后桥臂中点之间的电压。
- 根据权利要求1-4任一项所述的相位校准电路,其特征在于,所述整流器为半桥整流器,所述半桥整流器包括两个可控开关管;所述桥臂电压为所述半桥整流器的桥臂中点与地之间的电压。
- 根据权利要求1所述的相位校准电路,其特征在于,所述预设移相角为0,或, 所述预设移相角为大于0的固定预设值。
- 一种接收端的相位校准方法,其特征在于,应用于权利要求1-7任一项所述的相位校准电路,包括:检测整流器的输入电流;对所述整流器的输入电流进行滤波获得输入电流基波分量;获得所述输入电流和所述输入电流基波分量之间的相位差;将预设移相角减去所述相位差的结果作为实际移相角,控制所述整流器的桥臂电压的相位比所述输入电流基波分量的相位滞后所述实际移相角。
- 一种接收端,其特征在于,包括:接收线圈、整流器和权利要求1-8任一项所述的相位校准电路;所述接收线圈,用于接收发射线圈发射的电磁能量并输出交流电;所述整流器,用于将所述交流电整流为直流电;所述相位校准电路,用于根据所述整流器的输入电流滤波前和滤波后的相位差对所述整流器的桥臂电压的相位进行校准。
- 根据权利要求9所述的接收端,其特征在于,所述整流器为全桥整流器或半桥整流器。
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EP19897695.3A EP3799287B1 (en) | 2018-12-17 | 2019-09-24 | Phase calibration circuit and method for receiving end, and receiving end |
BR112021002260-0A BR112021002260A2 (pt) | 2018-12-17 | 2019-09-24 | circuito e método de alinhamento de fase de terminal receptor, e terminal receptor |
US17/137,786 US11038433B2 (en) | 2018-12-17 | 2020-12-30 | Phase alignment circuit and method of receive end, and receive end |
US17/345,189 US11482941B2 (en) | 2018-12-17 | 2021-06-11 | Phase alignment circuit and method of receive end, and receive end |
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US20210305904A1 (en) | 2021-09-30 |
CN109672343A (zh) | 2019-04-23 |
CN109672343B (zh) | 2020-12-18 |
US11038433B2 (en) | 2021-06-15 |
US20210126544A1 (en) | 2021-04-29 |
US11482941B2 (en) | 2022-10-25 |
EP3799287A4 (en) | 2021-09-08 |
BR112021002260A2 (pt) | 2021-05-04 |
EP3799287A1 (en) | 2021-03-31 |
EP3799287B1 (en) | 2023-04-26 |
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