2161 results about "Secondary side" patented technology

A multi-phase LLC resonant converter circuit (10) includes: first to third LLC resonant converters each including a series circuit (S1 to S3) of a first switch and a second switch that are connected in parallel to a DC power supply, a high-frequency transformer (T1 to T3) including a primary-side winding and a secondary-side winding, a resonant circuit including a resonant reactor (Lr1 to Lr3) connected between a connection point of the first switch and the second switch and one end of the primary-side winding, a resonant capacitor (Cr1 to Cr3) in which one end is connected to the other end of the primary-side winding, and a divided resonant capacitor (Cn1 to Cn3) in which one end is connected to a connection point of the primary-side winding and the resonant capacitor; a first neutral line (N1) that connects the other end of the resonant capacitor; a neutral line reactor (Ln) connected between the first neutral line and a power supply line of the DC power supply; and a second neutral line (N2) that connects the other end of the divided resonant capacitor.

The invention provides an impedance scanning device based on network side voltage dynamic compensation under a three-phase voltage imbalance working condition, and relates to the technical field of new energy station power electronic converter topology and control, the device comprises a three-phase rectifier, a direct current bus capacitor, an inverter, a voltage compensation device, a frequency sweeping device, a circuit breaker and a series transformer part, the three-phase rectifier is connected in series with inverters of the voltage compensation device and the frequency sweep device, a secondary side of a series transformer of the voltage compensation device is connected in series with a network side, a secondary side of a series transformer of the frequency sweep device is connected in series with a grid-connected point, and a primary side of the series transformer is connected to the inverters and is coupled to a secondary side of the series transformer; according to the device, the power grid side voltage is rectified through the voltage compensation unit and is compensated to the grid side after being subjected to single-stage inversion transformation, voltage compensation is achieved through the energy of a power grid when the voltage is unbalanced, and an external energy source or an interference source does not need to be introduced. After compensation, the accuracy of the frequency sweeping result is obviously improved.

The invention discloses a fault diagnosis method and system for a metering error of a voltage transformer, and relates to the technical field of power equipment fault diagnosis, and the method comprises the steps: obtaining the historical electric quantity data of a secondary side under the normal operation of the voltage transformer, and carrying out the noise reduction and normalization preprocessing; establishing an initial principal component analysis model according to the preprocessed historical electric quantity data, and calculating to obtain a statistic control threshold value; updating a mean vector and a covariance matrix of the model by adopting a dynamic strategy based on real-time acquired new electric quantity data of the secondary side of the voltage transformer; and calculating a new statistic according to the updated mean vector and the covariance matrix, comparing the new statistic with a statistic control threshold value, and if the new statistic is greater than the statistic control threshold value, determining a metering error fault. According to the invention, the model parameters can be updated according to the real-time change data output by the voltage transformer, the adaptability to different metering error ranges of the voltage transformer is improved, and the detection precision is improved.

The present application provides a converter and a chopper transistor blocking control method therefor. According to the chopper transistor blocking control method, when switching transistors in a converter need to be blocked, switching transistors in a primary side circuit connected to a transformer of the converter are blocked, and switching transistors in a secondary side circuit are blocked when the current on a branch where a secondary side winding in the transformer is located is zero, or batch blocking of the switching transistors in the secondary side circuit is completed after the current on the branch where the secondary side winding is located recirculates to zero, thereby avoiding overvoltage damage to the switching transistors caused by the current on the branch where the secondary side winding is located recirculating by means of the junction capacitance of the switching transistors in the secondary side circuit.

The invention belongs to the technical field of mutual inductor verification, and particularly relates to a data processing method for testing a current mutual inductor, so as to solve the technical problem that an existing verification method cannot truly reflect the comprehensive error of the mutual inductor, and the method comprises the following steps: S1, obtaining the current waveform data of a tested current mutual inductor; s2, deducting the exponential decay aperiodic component from the original current waveform data to obtain corrected current waveform data; s3, reconstructing to obtain de-noised current waveform data; s4, acquiring fundamental waves of the primary side current and the secondary side current and setting amplitude and phase angles of subharmonics; s5, calculating an initial ratio error and an initial angle error of the current transformer; s6, generating a ratio error compensation vector and an angular difference compensation vector; and S7, respectively carrying out vector summation on the initial ratio error and the initial angle error with the ratio error compensation vector and the angle error compensation vector to obtain the final ratio error and the final angle error of the current transformer. And the test accuracy and reliability of the ratio difference and the angle difference of the current transformer are improved.

An isolated bi-directional DC conversion circuit and a method for controlling the same are provided. The DC conversion circuit includes a transformer with a first energy storage element and a primary-side rectification bridge coupled to the primary side of the transformer and a second energy storage element and a secondary-side rectification bridge coupled to the secondary side of the transformer. The primary-side rectification bridge consists of multiple first power switching devices. The secondary-side rectification bridge consists of multiple second power switching devices. Each of the multiple first and the second power switching devices have a body diode in inverse parallel connection therewith. The DC conversion circuit further includes multiple first sampling resistors provided on each bridge arm of the secondary-side rectification bridge and a controller configured to perform switch control on the multiple second power switching devices based on a sampled voltage of the multiple first sampling resistors.

The invention belongs to the technical field of direct current monitoring, and discloses a TMR-based open-close type direct current leakage current detection device, which comprises a magnetic core, one or more pairs of TMR sensors, a secondary side feedback coil and a main control circuit, and is characterized in that the magnetic core is provided with air gaps which are oppositely arranged; the TMR sensors are symmetrically arranged in the air gap; the secondary side feedback coil is wound on the surface of the magnetic core and forms closed-loop control with the main control circuit; the main control circuit comprises an acquisition feedback circuit, a secondary side detection circuit and a main control chip, the acquisition feedback circuit acquires signals of the TMR sensor under the control of the main control chip, generates feedback current and inputs the feedback current to the secondary side feedback coil, and the secondary side detection circuit is connected between the secondary side feedback coil and the main control chip. And the main control chip collects the secondary side voltage of the secondary side detection circuit and calculates to obtain the direct current leakage current. According to the invention, direct current leakage current detection with high sensitivity, low drift and strong anti-interference capability is realized under the open-close structure, and the requirements of a modern electric power system on continuity, safety and maintainability are met.

A flyback converter to receive an input voltage and provide an output voltage is provided, and may include a transformer having a primary winding and secondary winding, a primary switch coupled to the primary winding, a synchronous rectifier device coupled to the secondary winding, and a secondary side control circuit to turn on the synchronous rectifier device by outputting a control signal at a first amplitude, subsequently modify the control signal to maintain a voltage across the synchronous rectifier device substantially constant until a predicted time that precedes a current in the synchronous rectifier device reaching substantially zero, subsequently turn off the synchronous rectifier device based on the voltage across the synchronous rectifier device reaching substantially zero, and subsequently turn on the synchronous rectifier device by outputting the control signal at a second amplitude, before the primary switch is turned on. The second amplitude is less than the first amplitude.

The invention discloses a low-harmonic high-voltage speed regulation system based on a multi-pulse phase-shifting transformer, and particularly relates to the field of power electronic technology and motor speed regulation, which is characterized in that the primary side of the multi-pulse phase-shifting transformer is in star connection, and N groups of windings on the secondary side are in extended delta connection, so that phase difference is realized; the multi-path low-voltage alternating current is converted into multi-path low-voltage alternating current and low-order harmonics are High voltage is output through cascade H-bridge topology series connection, and reliable conversion is guaranteed through rectification filtering inversion and device redundancy design; the motor control module collects signals through multiple sensors, and PWM drive signals are generated through a vector control algorithm and coordinate transformation. The harmonic detection and compensation module detects harmonic waves based on an FFT algorithm, and injects a reverse compensation component through a modulation strategy to offset the harmonic waves; and the auxiliary protection module integrally realizes low-harmonic and high-precision high-voltage motor speed regulation through multi-dimensional monitoring and hardware protection.

A single-stage AC-to-DC resonant converter is used to convert a three-phase AC power source into a DC power source. The single-stage AC-to-DC resonant converter includes a primary-side circuit, a resonant circuit, and a secondary-side circuit. The primary-side circuit includes three primary-side switch circuits, and each primary-side switch circuit is coupled to one phase of the three-phase AC power source. The resonant circuit includes three transformers, and primary-side windings of the transformers are respectively coupled to the primary-side switch circuits, and secondary-side windings of the transformers are coupled to the secondary-side circuit.

The invention provides a resonant conversion module and a soft start method thereof, a control unit and an energy storage system, and the soft start method comprises the steps: dividing a plurality of primary side duty ratio adjustment stages, and setting the duty ratio step length of each primary side duty ratio adjustment stage; according to the duty ratio step length and the duty ratio preset accumulation duration of each primary side duty ratio adjustment stage, soft start of the duty ratio of each adjustment stage is completed until the duty ratio of a primary side switch tube reaches a primary side soft start target duty ratio; a plurality of secondary side duty ratio adjusting stages are divided, and the duty ratio step length of each secondary side duty ratio adjusting stage is set; and according to the duty ratio step length and the duty ratio preset accumulation duration of each secondary side duty ratio adjustment stage, completing the soft start of the duty ratio of each adjustment stage until the duty ratio of a secondary side switch tube reaches a secondary side soft start target duty ratio. By setting the duty ratio step length in stages, the soft start time consumption is reduced, the soft start efficiency is improved, and the working safety of the energy storage system is improved.

Embodiments of the present disclosure provide a cooling system for a data center, including a heat exchanger and an adsorption refrigeration assembly. The heat exchanger is configured to cool a first secondary side cooling liquid and provide the cooled first secondary side cooling liquid to a device to be cooled. The adsorption refrigeration assembly is connected to the heat exchanger and configured to receive a heated first secondary side cooling liquid from the device to be cooled, use the heated first secondary side cooling liquid as a heat source to desorb at least one adsorption refrigeration module in the adsorption refrigeration assembly, return the first secondary side cooling liquid to the heat exchanger, condense water vapor desorbed from the at least one adsorption refrigeration module into condensed water, and cool a second secondary side cooling liquid with the condensed water and provide the cooled second secondary side cooling liquid to an air conditioning device.

The invention discloses a multi-machine common-bus generator system stator grounding fault active arc extinction method based on online calculation of ground capacitance parameters, and the method comprises the following steps: S1, connecting a controllable current source in parallel with a secondary side of a generator neutral point grounding transformer, and injecting current into a neutral point; extracting a voltage component with the same frequency as the injection current, and calculating a ground capacitance parameter of the generator system on line through the voltage component and the injection current value; s2, measuring the three-phase phase voltage of the generator and the phase value of the zero-sequence current at the generator end of the generator, and solving the fundamental wave potential of a fault point based on the measured value; deriving a compensation current needing to be injected at the generator end side of the fault phase generator, and injecting the compensation current at the generator end; and S3, after compensating current is injected into the generator ends to realize arc extinguishing of fault points, measuring the generator end zero-sequence current phase of each generator again, and performing fault selective positioning, thereby determining a fault unit in the multi-generator common-mother system. According to the method, effective arc extinction can be realized, and the fault unit can be reliably judged.

A wireless power transfer system includes a power transmission device and a power reception device that is wirelessly supplied with power from the power transmission device. The power reception device includes a secondary side resonance circuit, a magnetic flux generation circuit, and a secondary side detection circuit. The power transmission device transitions from a standby state to a power transmission state in which a power transmission current is supplied to a primary side coil when a primary side detection circuit detects an increase in magnetic flux, generated by the magnetic flux generation circuit, linking the primary side coil. The magnetic flux generation circuit adjusts the generated magnetic flux based on a detected value of the secondary side detection circuit.

The invention discloses a nuclear power plant secondary side cleanliness evaluation and radiation shielding method. The method comprises the following steps that S1, whole secondary circuit system equipment of a steam generator is washed; s2, full-coverage cleanliness inspection is carried out in the range from a filter screen of the electric main water feeding pump system to the secondary side of the steam generator, and meanwhile, if foreign matter is found, a cleaning tool is used for picking up the foreign matter; s3, evaluating the cleanliness condition, and if the cleanliness is qualified, ending; if the cleanliness is not qualified, returning to the step S1; s4, if the foreign matter falls off after the steam generator runs, stopping the equipment, and filling the secondary side of the steam generator with water to a preset position for reducing the radiation dose; and S5, picking up foreign matters by using a cleaning tool. Full-coverage cleanliness inspection is carried out in the range from the filter screen of the electric main feed pump system to the secondary side of the steam generator, effective verification of the secondary loop foreign matter flushing effect and radiation shielding when necessary are achieved, and foreign matter remaining on the secondary side of the steam generator is avoided.

The invention discloses a method and a system for detecting the health state of a transformer in real time, relates to the technical field of transformer detection, is used for solving the problem of fault early warning lag, and aims at solving the problem of fault early warning lag by monitoring the output voltage of the primary side and the secondary side of the transformer, calculating the fluctuation ratio, analyzing the stable operation state and counting the abnormal duration. After entering a temperature rise analysis mode based on duration judgment, detecting oil temperature and winding temperature, calculating a difference value, calling a cooling system start-stop instruction to obtain a cooling response value, calculating a response lag rate, collecting data of gas dissolved in oil, calculating a gas anomaly ratio, and analyzing thermoelectric synergy anomaly characteristics in combination with the response lag rate; the method comprises the following steps: acquiring an insulation aging grade and an oil product replacement period from a historical maintenance database, evaluating an insulation degradation coefficient according to the insulation aging grade and the oil product replacement period, analyzing a health state in combination with thermoelectric collaborative abnormal characteristics, selecting an operation optimization or shutdown maintenance mechanism, improving fault early warning capability, optimizing a maintenance strategy, and prolonging the service life of equipment.

A deterioration diagnosing device (2) for a transformer (4) provided at the output of an auxiliary power supply device (3) having a power converting circuit (33) comprises: a current acquiring unit (21) that acquires current values flowing through the primary side and the secondary side of the transformer (4); a voltage acquiring unit (22) that acquires the primary-side and secondary-side voltage values of the transformer (4); an input power calculating unit (23) that calculates an input power, which is the primary-side power of the transformer (4); an output power calculating unit (24) that calculates an output power, which is the secondary-side power of the transformer (4); a power loss calculating unit (25) that calculates the power loss of the transformer (4) on the basis of the input power and the output power; and a deterioration determining unit (26) that determines whether or not the transformer (4) has deteriorated, depending on whether or not a deviation between the power loss calculated by the power loss calculating unit (25) and a normal power loss is greater than or equal to a threshold value, on the basis of a determination criterion indicating a relationship between the secondary-side current of the transformer (4) and the normal power loss of the transformer (4).

The invention relates to the technical field of power system signal measurement, in particular to a mutual inductor digital sampling method and system. The method comprises the following steps: acquiring a signal output by a secondary side of a mutual inductor for a power system in real time; determining the load fluctuation degree at the current moment; determining a dynamic sensitivity coefficient at the current moment; obtaining a dynamic reference mean value, a dynamic relaxation parameter and a dynamic decision threshold value used in the CUSUM algorithm at the current moment; determining the cumulative sum between the signal and the dynamic reference value in the CUSUM algorithm at the current moment; and determining the sampling frequency of the mutual inductor according to the cumulative sum between the signal and the dynamic reference value in the CUSUM algorithm at the current moment and the size of the dynamic decision threshold so as to realize digital sampling of the mutual inductor. According to the invention, through adaptive adjustment of the reference mean value, the relaxation parameter and the decision threshold value, the rate of missing report and false report is reduced, and the identification capability of initial faults such as mutual inductor turn-to-turn short circuit and the like is improved.

Provided in the present disclosure are a voltage conversion circuit, a charging station, and a control method for a charging station. The voltage conversion circuit comprises a transformer and a change-over switch module, wherein the transformer comprises a primary-side winding, a secondary-side winding and a free winding; the switch module comprises a primary-side change-over switch and a secondary-side change-over switch; a first end of the primary-side winding is used for connecting to an inverter circuit, and a second end of the primary-side winding is connected to the free winding or the inverter circuit by means of the primary-side change-over switch; a first end of the secondary-side winding is used for connecting to a rectifier circuit, and a second end of the secondary-side winding is connected to the free winding or the rectifier circuit by means of the secondary-side change-over switch; and by means of adjusting a connection state between the primary-side change-over switch and the secondary-side change-over switch, the free winding and the primary-side winding are connected in series, or the free winding and the secondary-side winding are connected in series, so as to change the turn ratio of the transformer. In the embodiments of the present disclosure, by means of controlling the states of switches, the turn ratio of a primary side to a secondary side of the transformer is bidirectionally changed in a low-cost manner, thereby expanding the output voltage range of the voltage conversion circuit.

The invention relates to the technical field of electrical engineering, and discloses a voltage transformer, a design method and device thereof and a storage medium, and the method comprises the steps: determining the size of an iron core, and the electrical parameters of a primary side winding and a secondary side winding according to the electrical performance parameters and space limitation conditions of a target voltage transformer; calculating no-load loss, no-load magnetization and no-load current of the target voltage transformer based on the ferromagnetic material attribute parameters and the iron core size; determining a leakage reactance value reduced to a secondary side and total resistance of the winding according to the winding structure parameters; establishing an initial three-dimensional finite element simulation model of the voltage transformer based on the iron core size information and the winding parameters; determining a no-load error and a load error of the voltage transformer based on the no-load loss, the no-load magnetization, the leakage reactance value, the total winding resistance and the winding structure parameters; and performing feedback optimization on the initial simulation model based on the no-load error and the load error to obtain a target three-dimensional finite element simulation model, and manufacturing a target voltage transformer based on the simulation model.

The invention discloses a half-bridge ZVS Buck-Boost converter and a control method thereof, and belongs to the technical field of power converters, the half-bridge ZVS Buck-Boost converter comprises a primary side conversion module, a voltage transformation module and a secondary side conversion module, and the primary side conversion module, the voltage transformation module and the secondary side conversion module are connected in sequence; the primary side conversion module comprises a first bridge arm, a second bridge arm, a first inductor and a bidirectional switch, the first bridge arm and the second bridge arm are connected in parallel, a bridge arm midpoint of the first bridge arm is connected with a first end of the first inductor, a second end of the first inductor is connected with a first end of the voltage transformation module, and a second end of the voltage transformation module is connected with a second end of the voltage transformation module. The second end of the voltage transformation module is connected with the bridge arm midpoint of the second bridge arm, the bridge arm midpoint of the first bridge arm is connected with the first end of the bidirectional switch, and the second end of the bidirectional switch is connected with the bridge arm midpoint of the second bridge arm. According to the invention, zero-voltage switching-on of the half-bridge circuit switching tube in a full-input, full-output and full-load range under a constant switching frequency can be realized.

The invention relates to a harmonic suppression and dynamic voltage compensation method based on a composite control series filter, and belongs to the field of power electronic technology and electric energy quality control. Harmonic current passing through a primary winding of a transformer and a sudden rising or falling signal of power supply voltage are extracted, and after the two signals are controlled and combined into a reference signal, a voltage source inverter (VSI) connected with a secondary side of the transformer in parallel shows a controllable voltage characteristic. The control parameters of the harmonic current can enable the transformer to present relatively large controllable impedance to harmonic waves, so that harmonic wave isolation is realized. In addition, the VSI compensates for the system voltage deviation by detecting the voltage drop. And finally, establishing a simulation model to verify that the series active power filter based on the control strategy can isolate harmonic waves and effectively compensate voltage deviation. Harmonic suppression and dynamic voltage compensation functions can be realized at the same time, and the power quality of a middle-high voltage system is improved.

The invention provides a liquid cooling system cooling capacity distribution unit control method, device and unit and a liquid cooling system. The method comprises the steps that current hydraulic parameters of cooling liquid in a secondary side liquid supply and return pipeline are obtained; if the current hydraulic parameter is smaller than a preset hydraulic threshold value and the absolute difference value between the current hydraulic parameter and the preset hydraulic threshold value is larger than a first preset difference value, the frequency of a circulating pump and / or the opening degree of a bypass valve are / is adjusted according to the current hydraulic parameter and the preset hydraulic threshold value so as to increase the flow of cooling liquid in a secondary side liquid supply and return pipeline; and if the current hydraulic parameter is larger than a preset hydraulic threshold value and the absolute difference value is larger than a first preset difference value, the frequency of a circulating pump and / or the opening degree of a bypass valve are / is adjusted according to the current hydraulic parameter and the preset hydraulic threshold value so as to reduce the flow of the cooling liquid in the secondary side liquid supply and return pipeline. Heat dissipation control can be carried out timely and accurately, the heat dissipation performance of the liquid cooling system is improved, the heat dissipation requirement of the server is met, and normal operation of the server is guaranteed.

The invention discloses an all-in-one power supply device, a power assembly and an electric vehicle, and relates to the technical field of new energy automobiles. The all-in-one power supply device comprises a vehicle-mounted charger circuit, a three-phase inverter circuit and a switch unit. The vehicle-mounted charger circuit comprises a primary side circuit, a resonant cavity and a secondary side circuit, the primary side circuit is used for converting alternating current output by an alternating current power supply into direct current, the primary side circuit is further used for carrying out power conversion on the direct current together with the resonant cavity and the secondary side circuit, and the secondary side circuit is used for charging a power battery of an electric vehicle. The three-phase inverter circuit is used for receiving power supplied by the power battery and supplying power to a driving motor of the electric vehicle. And the switch unit is used for selectively conducting connection between the middle points of the two bridge arms of the secondary circuit and the resonant cavity or between the middle points of the two bridge arms of the three-phase inverter circuit. The secondary side circuit of the single-stage vehicle-mounted charger is reused to supply power to the driving motor, reuse of a high-specification power tube is achieved, power density is improved, the size and weight of the all-in-one power supply device are reduced, and cost is saved.

The embodiment of the invention provides a mutual inductor state monitoring system and method for an intelligent laboratory standard electric energy meter, and relates to the technical field of electric energy meters. The mutual inductor state monitoring system comprises a main control unit and a data acquisition unit, wherein the data acquisition unit is used for acquiring a signal measurement value and a working temperature of a secondary side of a mutual inductor; the main control unit is configured to execute the following calculation modules: a linear regression calculation module used for performing regression analysis on the signal measurement value acquired by the data acquisition unit so as to estimate a signal true value; the temperature compensation module is used for removing the influence of the working temperature on the real value of the signal based on the standard value matrix; and the state judgment module is used for calculating an abnormal score of the signal true value after the influence of the working temperature is removed based on the isolated tree model, and judging the misalignment state of the mutual inductor based on the abnormal score and a preset misalignment boundary threshold, so that the monitoring precision of the mutual inductor in the standard electric energy meter can be improved.

The utility model provides a transformer module which comprises a primary side assembly, a secondary side assembly and a magnetic element. The primary side assembly is provided with a first cover body, a first column body and a first coil. The first column body is connected to the first cover body. The first coil is wound on the first cylinder. The secondary side assembly is provided with a second cover body, a second column body and a second coil. The second column body is connected to the second cover body. The second coil is wound on the second cylinder. The magnetic element is arranged between the primary side assembly and the secondary side assembly. The first column body is fixedly connected to the second column body, and the size of the first column body is larger than that of the second column body.

The invention provides a power converter and a control circuit and method thereof, and the method comprises the steps: carrying out the modulation processing of the obtained switching frequency information and / or current reference information at a secondary side of the power converter, generating a reference pulse signal, and transmitting the pulse signal to a primary side through a digital isolator, therefore, a primary side control signal can be obtained after corresponding demodulation processing is carried out on the reference pulse signal on the primary side, and control over the on-off state of a primary side power tube is achieved. According to the scheme of the invention, through special modulation and demodulation setting, various kinds of information can be transmitted between the secondary side and the primary side only through a single channel, the use number of isolation devices between the primary side and the secondary side is reduced, the system structure is simplified, and the system cost is reduced.

The invention discloses an auxiliary power supply and an energy storage system. The auxiliary power supply comprises an input interface, at least two switch modules, an isolation transformer, an output module, a control module and a driving module. The input interface is configured to access a power supply module, the output module is configured to access a load, and working voltages of different switch modules are different; the isolation transformer comprises at least two primary sides and a secondary side coupled with the primary sides, different primary sides have different inductance values, each primary side is connected with the input interface through one switch module, the secondary side is electrically connected with the output module, and the control module is connected with the input interface and each switch module and is configured to detect the power supply voltage of the input interface; the control module is connected with each switch module and outputs a target control signal according to the power supply voltage, the driving module is connected with the control module and each switch module and is used for driving the target switch module to work according to the target control signal, and the target switch module is one of the switch modules. Therefore, the auxiliary power supply can stably and efficiently work in a wide working voltage range.

Methods and systems for dynamic wireless power transfer to charge an electric vehicle (EV) in motion are provided. The method can include: transmitting wireless power from a plurality of main transmitter coils; transmitting wireless power from a assisted coil disposed between each pair of adjacent main transmitter coils; receiving the wireless power at a receiver coil when the electric vehicle is charged in motion; providing a primary compensation network coupled to the main transmitter coils and the assisted coils; and compensating for reactive power at a secondary side by a secondary compensation network coupled to the receiver coil. Dimensions and positions of the assisted coils and parameters of the compensation network are configured to maintain a substantially constant mutual inductance profile between the transmitter coils and the receiver coil when the electric vehicle is charged in motion, thereby reducing power pulsation and providing a stable output voltage to the battery of the EV.

The invention relates to a liquid cooling dynamic regulation control method, system and device with load feedback, and belongs to the technical field of liquid cooling distribution. Comprising the following steps: S1, acquiring inlet and outlet liquid temperature and real-time power consumption data of each to-be-cooled device in real time; s2, the inlet and outlet liquid temperature of each device is compared with a safe temperature threshold value, and the rotating speed of a water pump on the secondary side is dynamically adjusted according to the comparison result; when the inlet and outlet liquid temperature is close to the safe temperature threshold value, the heat dissipating capacity of each device is calculated according to the inlet and outlet liquid temperature and the real-time power consumption data; adjusting the rotating speed of the water pump according to the heat dissipating capacity; wherein when the S1 is executed, a fluid channel, used for heat exchange of the secondary side, in the primary side is set to be at the fixed opening degree, and the water temperature of the primary side is obtained in real time; and when it is detected that the water temperature of the primary side is abnormal or breaks down, the state of the fluid channel is automatically switched to the bypass mode. Dynamic adjustment of the rotating speed of the water pump is achieved, dependence on the total liquid return temperature is not needed, the cooling efficiency is improved, and energy consumption is reduced.