TWI873471B - Vehicle charging circuit - Google Patents

Abstract

A vehicle charging circuit is provided. The vehicle charging circuit includes a power control circuit and an arithmetic controller. The power control circuit includes three silicon-controlled rectifier switches and three diodes. The arithmetic controller includes a processor, a driving circuit and a phase detector. The processor performs operations according to the plurality of phase signals, the voltage difference and a trigger phase of a previous cycle, so that the processor obtains at least two trigger phases, and provides a plurality of trigger control signals to the driving circuit according to the at least two trigger phases.

Description

Car charging circuit

The present invention relates to a vehicle charging circuit, and more particularly to a vehicle charging circuit for detecting multiple phase signals.

Existing car charging devices mainly judge whether to charge the battery based on the output voltage of the battery, but this charging method is not accurate. In addition, traditional charging methods also use a preset parameter table that conforms to a specific model of car generator to control the drive circuit to charge the battery. Therefore, this type of car charging circuit can only be used with a specific model of car generator.

The technical problem to be solved by the present invention is to provide a vehicle charging circuit for electrically connecting a vehicle generator and a battery in view of the shortcomings of the prior art. The vehicle charging circuit comprises: a power control circuit electrically connected to the vehicle generator, the power control circuit comprising three silicon-controlled rectifier switches and three diodes, each of the silicon-controlled rectifier switches being connected to one of the diodes; and an operation control circuit electrically connected to the power control circuit, the vehicle generator and the battery, the operation control circuit comprising: a processor; a drive circuit electrically connected to the power control circuit and the processor; and a phase detection circuit electrically connected to the vehicle generator and the processor, the vehicle generator being a three-phase generator, the phase detection circuit Used to detect multiple phase signals of multiple power signals or multiple magnetic signals of the vehicle generator; wherein the processor divides and normalizes two of the multiple phase signals to obtain two corresponding normalized phase signals, the processor analyzes the two normalized phase signals corresponding to the two phase signals, and the processor obtains an output voltage of the power control circuit, the processor calculates a voltage difference between a preset voltage and the output voltage, and the processor performs operations based on the multiple phase signals, the voltage difference and a previous cycle trigger phase, so that the processor obtains at least two trigger phases, and provides a trigger control signal to the drive circuit based on the at least two trigger phases.

One of the beneficial effects of the present invention is that the vehicle charging circuit provided by the present invention obtains and analyzes multiple phase signals and obtains several operation parameter values to calculate the trigger phase, and the processor controls the drive circuit through the trigger phase, so that the drive circuit drives the power control circuit to convert the alternating current of the vehicle generator into a charging current, thereby stably charging the battery.

To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only used for reference and description and are not used to limit the present invention.

The following is a specific embodiment to illustrate the implementation of the "vehicle charging circuit" disclosed in the present invention. Technical personnel in this field can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only for simple schematic illustrations and are not depicted according to actual sizes. Please note in advance. The following implementation will further explain the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of protection of the present invention. In addition, the term "or" used herein may include any one or more combinations of the associated listed items as appropriate.

[First embodiment]

Please refer to FIG. 1 , which is a functional block diagram of a vehicle charging circuit according to an embodiment of the present invention.

The present embodiment provides a vehicle charging circuit 1. The vehicle charging circuit 1 is electrically connected to a vehicle generator 9 and a battery 8. The vehicle charging circuit 1 includes a power control circuit 12 and an operation control circuit 10. In practice, the power control circuit 12 is electrically connected to the vehicle generator 9. The operation control circuit 10 is electrically connected to the power control circuit 12, the vehicle generator 9 and the battery 8. The battery 8 is electrically connected to the vehicle system 6 through a power switch 7. The vehicle system 6 is, for example, a car, a motorcycle or other means of transportation. The present embodiment does not limit the state of the vehicle charging circuit 1 and the vehicle system 6.

In detail, the operation control circuit 10 includes a detection circuit 100, a power start circuit 102, a processor 104, a drive circuit 106, a phase detection circuit 108 and a temperature unit 110. In practice, the detection circuit 100 is electrically connected to the vehicle generator 9 and the power start circuit 102. The power start circuit 102 is electrically connected to the power control circuit 12 and the battery 8, the detection circuit 100, the processor 104, the drive circuit 106, the phase detection circuit 108 and the temperature unit 110. The processor 104 is electrically connected to the drive circuit 106, the phase detection circuit 108 and the temperature unit 110. The driving circuit 106 is electrically connected to the power control circuit 12 and the processor 104. The phase detection circuit 108 is electrically connected to the vehicle generator 9 and the processor 104. In this embodiment, the phase detection circuit 108 is disposed in the vehicle generator 9. The phase detection circuit 108 is a Hall sensor.

The processor 104 divides and normalizes the phase signal to obtain a normalized phase signal, and the processor 104 obtains an output voltage of the power control circuit 12. The processor 104 calculates a voltage difference between a preset voltage and the output voltage. The processor 104 performs operations based on the normalized phase signal, the voltage difference, and a previous cycle trigger phase, so that the processor 104 obtains at least one trigger phase, and the processor 104 uses at least one trigger phase as a trigger control signal and outputs the trigger control signal to the drive circuit 106. The driving circuit 106 drives the power control circuit 12 according to the trigger control signal, so that the power control circuit 12 converts the AC power of the vehicle generator 9 into a charging current, and outputs the charging current to charge the battery 8. The charging current is a DC current.

Next, the detection circuit 100 is implemented, for example, by a detection circuit or a state detection circuit. The detection circuit 100 is used to detect a voltage state of the vehicle generator 9. The voltage state is, for example, a non-zero voltage or a voltage level. For example, the detection circuit 100 detects whether the vehicle generator 9 has a voltage, or detects whether the voltage of the vehicle generator 9 exceeds a preset value. When the detection circuit 100 detects a voltage state of the vehicle generator 9, the detection circuit 100 outputs a detection signal to the power start circuit 102. That is, when the vehicle generator 9 has a voltage or the voltage exceeds a preset value, the detection circuit 100 will output a detection signal to the power start circuit 102.

The power startup circuit 102 is implemented, for example, by a power startup circuit, a power processing and startup circuit, or a conditional startup circuit. The power startup circuit 102 of this embodiment uses two conditions to start each unit in the operation control circuit 10. In other embodiments, the power startup circuit 102 can also start each unit in the operation control circuit 10 with one condition or multiple conditions. This embodiment does not limit the operation mode of the power startup circuit 102.

When the power start circuit 102 determines that a battery voltage of the battery 8 exists, the power start circuit 102 instructs the processor 104, the drive circuit 106, the phase detection circuit 108 and the temperature unit 110 to start operation according to the detection signal and the battery voltage. In practice, when the voltage of one of the vehicle generator 9 and the battery 8 does not exist, the power start circuit 102 will not start the operation of each unit in the operation control circuit 10, thereby achieving the functions of energy saving, power saving and environmental protection.

When the voltage of the vehicle generator 9 and the battery 8 are both present, the power start circuit 102 will start the operation of each unit in the operation control circuit 10. For example, after the motorcycle has been parked for a period of time and has not been used, if the battery 8 still has enough power to start the motorcycle engine and the vehicle generator 9, the power start circuit 102 will start the operation of each unit such as the processor 104, the drive circuit 106, the phase detection circuit 108 and the temperature unit 110 according to the voltage of the vehicle generator 9 and the battery 8.

The phase detection circuit 108 is implemented, for example, by a phase sensor. The phase detection circuit 108 is used to detect a phase signal of the vehicle generator 9. In practice, the phase signal is, for example, a single-phase signal, a dual-phase signal, a three-phase signal, or a multi-phase signal. This embodiment does not limit the state of the phase signal. The phase detection circuit 108 outputs a detected phase signal of the vehicle generator 9 to the processor 104.

The processor 104 is implemented, for example, by a microprocessor, a microcontroller, an arithmetic unit, a digital processor or other processing circuits. The processor 104 is used to receive and calculate the signals output by each unit. This embodiment does not limit the state of the processor 104. The processor 104 receives a phase signal, and divides and normalizes the phase signal (Phase Normalization) to obtain a normalized phase signal (Pn), and stores the normalized phase signal in a register. When the processor 104 determines that the phase signal is in an abnormal state, the processor 104 stops controlling the trigger drive circuit 106, so that the power control circuit 12 stops converting the AC power of the vehicle generator 9 into a charging current.

In addition, the processor 104 can also obtain the output voltage of the power control circuit 12 through the feedback circuit, and the processor 104 calculates a voltage difference between a preset voltage and the output voltage. Afterwards, the processor 104 performs operations according to the normalized phase signal, the voltage difference, and a previous cycle trigger phase, so that the processor 104 obtains a trigger phase, and the processor 104 uses the trigger phase as a trigger control signal and outputs the trigger control signal to the drive circuit 106. Among them, the normalized phase signal, the voltage difference, and the previous cycle trigger phase are used by a fuzzy control operation program of the processor 104 to calculate the trigger phase.

The driving circuit 106 is, for example, a trigger driving circuit, an SCR driving circuit, or a driving circuit of other transistor switches. Generally speaking, it is a driving circuit that can provide a three-phase control signal. This embodiment does not limit the form of the driving circuit 106. The driving circuit 106 controls the power control circuit 12 according to the trigger control signal, so that the power control circuit 12 converts the AC power of the vehicle generator 9 into a charging current, and outputs the charging current to charge the battery 8.

The temperature unit 110 is implemented, for example, by a temperature detection circuit, a temperature-voltage conversion circuit, or other temperature detection circuits. The temperature unit 110 is used to detect a temperature signal of the operation control circuit 10. For example, the temperature unit 110 is used to detect the temperature of one or a combination of the processor 104, the drive circuit 106, the phase detection circuit 108, the detection circuit 100, and the power startup circuit 102, whereby the temperature unit 110 outputs a temperature signal to the processor 104, and the processor 104 adjusts the output size of the charging current according to the temperature signal.

The processor 104 determines whether the temperature signal exceeds a preset temperature. If the determination result is yes, the processor 104 delays the trigger phase of the drive circuit 106 to reduce the power control circuit 12 to convert the AC power of the vehicle generator 9 into a charging current, and outputs the reduced charging current to charge the battery 8. If the determination result is no, the processor 104 outputs a trigger control signal to the drive circuit 106, and the drive circuit 106 controls the power control circuit 12 according to the trigger control signal, so that the power control circuit 12 converts the AC power of the vehicle generator 9 into a charging current, and outputs the charging current to charge the battery 8. In this embodiment, the power control circuit 12 is a full-wave rectifier circuit or a half-wave rectifier circuit.

It is worth noting that when the temperature of the operation control circuit 10 obtained by the temperature unit 110 is higher, the processor 104 delays the trigger phase of the drive circuit 106, thereby reducing the output of the charging current supplied by the power control circuit 12. Conversely, when the temperature of the operation control circuit 10 obtained by the temperature unit 110 is lower, the processor 104 advances the trigger phase of the drive circuit 106, thereby increasing the output of the charging current supplied by the power control circuit 12.

In other words, the higher the temperature of the operation control circuit 10, the smaller the output of the power control circuit 12, thereby protecting the units in the operation control circuit 10. Conversely, the lower the temperature of the operation control circuit 10, the larger the output of the power control circuit 12, thereby increasing the output power of the power control circuit 12. This embodiment does not limit the operation modes of the operation control circuit 10 and the power control circuit 12.

It is worth noting that the general control unit establishes a preset parameter table to control the driving of the general drive circuit according to the different characteristics and different phase sequence of the vehicle generator 9. However, the processor 104 of this embodiment does not need to establish a preset parameter table to control the driving of the drive circuit 106. This embodiment adopts phase angle with closed loop control and fuzzy control operation program, which can be widely matched with vehicle generators 9 with different characteristics and different phase sequences, without the need to readjust or preset parameter tables, thereby improving the convenience of use of the vehicle charging circuit 1. In this embodiment, the processor 104 is a digital controller or an analog integrated circuit.

Please refer to FIG. 2 and FIG. 3 . FIG. 2 is a circuit diagram of the power control circuit in FIG. 1 . FIG. 3 is another circuit diagram of the power control circuit in FIG. 1 .

Please refer to FIG. 1, FIG. 2 and FIG. 3 at the same time. The power control circuit 12 is, for example, a three-phase rectifier circuit or a single-phase rectifier circuit. In practice, the rectifier circuit is, for example, a full-bridge rectifier circuit or a half-bridge rectifier circuit, and the present embodiment does not limit the form of the rectifier circuit. When the AC power passes through the rectifier circuit to obtain a pulsed DC power supply, the pulsed DC power supply is used as the input voltage of the supply battery 8. Furthermore, the pulsed DC power supply can be a full-wave or half-wave pulsed DC power supply. In the present embodiment, the power control circuit 12 is a three-phase rectifier circuit.

Referring to FIG. 2 , the power control circuit 12 of this embodiment is illustrated by six silicon-controlled rectifier switches (SCRs), wherein the six SCRs are electrically connected to the driving circuit 106. In other embodiments, a single-phase power rectifier circuit composed of four SCRs may be used.

Please refer to FIG. 3 . In this embodiment, the power control circuit 12 is connected to the driving circuit 106 by three silicon-controlled rectifier switches and three diodes.

The first silicon-controlled rectifier switch SSW1 includes a first end and a second end. The second silicon-controlled rectifier switch SSW2 includes a first end and a second end. The third silicon-controlled rectifier switch SSW3 includes a first end and a second end. The first diode RD1 includes a first end and a second end. The second diode RD2 includes a first end and a second end. The third diode RD3 includes a first end and a second end.

The first end of the first silicon-controlled rectifier switch SSW1 is electrically connected to the first end of the second silicon-controlled rectifier switch SSW2 and the first end of the third silicon-controlled rectifier switch SSW3. The second end of the first silicon-controlled rectifier switch SSW1 is electrically connected to the first end of the first diode RD1. The second end of the second silicon-controlled rectifier switch SSW2 is electrically connected to the first end of the second diode RD2. The second end of the third silicon-controlled rectifier switch SSW3 is electrically connected to the first end of the third diode RD3. The second end of the first diode RD1, the second end of the second diode RD2 and the second end of the third diode RD3 are electrically connected to each other.

In addition, the dead zone between the trigger control signals of the first silicon-controlled rectifier switch SSW1, the second silicon-controlled rectifier switch SSW2 and the third silicon-controlled rectifier switch SSW3 is different from the trigger control signals using six silicon-controlled rectifier switches VT ₁ -VT ₆ in FIG1B . In this embodiment, the trigger control signals of the first silicon-controlled rectifier switch SSW1, the second silicon-controlled rectifier switch SSW2 and the third silicon-controlled rectifier switch SSW3 control the first silicon-controlled rectifier switch SSW1, the second silicon-controlled rectifier switch SSW2 and the third silicon-controlled rectifier switch SSW3 with a phase difference of 120 degrees. The dead zone between the trigger control signals is adjusted according to the silicon-controlled rectifier switches SSW1-SSW3, the diodes RD1-RD3 and the designer's experience. In this embodiment, the power control circuit 12 using three silicon-controlled rectifier switches and three diodes can effectively control the temperature and cost of the vehicle charging circuit 1.

Please refer to FIG. 4A, FIG. 4B and FIG. 4C. In this embodiment, the phase signal can be mainly a single-phase signal, that is, the phase detection circuit 108 detects the phase change of the power signal or magnetic signal of one of the three-phase R, S, T of the vehicle generator 9 at different time points. FIG. 4B detects the phase change of the power signal or magnetic signal of the R phase and the S phase. FIG. 4C detects the phase change of the power signal or magnetic signal of the three-phase R, S, T of the vehicle generator 9.

As shown in FIG4B , the dual-phase signal is a phase signal of two phases of the multiple power signals or magnetic signals of the three-phase R, S, T of the vehicle generator 9 detected by the phase detection circuit 108. In this embodiment, the phase signals of two phases can be obtained, so the two silicon-controlled rectifier switches of the corresponding power control circuit 12 can be accurately controlled, and the trigger control signal of the silicon-controlled rectifier switch of the other phase can be adjusted according to the two-phase phase signal originally used as the calculation basis, for example, a fixed phase value is added according to one of the trigger control signals of the first two phases, and then the trigger time point of the trigger control signal of the silicon-controlled rectifier switch of the other phase is determined.

That is, the trigger phase calculated by the processor 104 provides a trigger control signal to the silicon-controlled rectifier switches SSW1-SSW3, so that the electric energy generated by the vehicle generator 9 can safely charge the battery.

As shown in FIG. 4C , the three-phase phase signal is detected, that is, all the power signals or magnetic signals of the three-phase R, S, T of the vehicle generator 9 are detected and standardized. Then, the processor 104 performs calculations. The processor 104 can trigger the configuration of the control signal through the accurate three-phase R, S, T phase signal.

In this embodiment, since the phase signal can be a single-phase signal, a dual-phase signal, a three-phase signal, or even a multi-phase signal, the processor 104 needs to use different calculation processes to perform different calculations on different types of phase signals.

Please refer to FIG5, which is a schematic diagram of the trigger control signal provided by the processor of the embodiment of the present invention. In FIG5, the trigger control signals of the first silicon-controlled rectifier switch SSW1, the second silicon-controlled rectifier switch SSW2 and the third silicon-controlled rectifier switch SSW3 are included. In this embodiment, only the trigger control signals of two cycle intervals T1 and T2 are presented.

First, the processor 104 calculates the trigger phase according to the plurality of normalized phase signals, which in this embodiment is configured as the trigger time intervals DT1' and DT2' of the trigger control signals S1 and S2 of the first silicon-controlled rectifier switch SSW1 and the second silicon-controlled rectifier switch SSW2. The trigger phase can be converted into time as a basis for triggering the trigger control signals S1 and S2.

That is, the trigger time intervals DT1' and DT2' of the trigger control signals S1 and S2 of the first silicon-controlled rectifier switch SSW1 and the second silicon-controlled rectifier switch SSW2 can be different from the trigger time intervals DT1 and DT2 of the previous cycle. In addition, the opening times ST1 and ST2 of the trigger control signals S1 and S2 of the first silicon-controlled rectifier switch SSW1 and the second silicon-controlled rectifier switch SSW2 can also be adjusted. As shown in FIG. 5, the opening times ST1 and ST1' of the trigger control signal S1 of the first silicon-controlled rectifier switch SSW1 are different. The processor 104 determines the charging state of the vehicle charging circuit 1 according to the temperature signal of the operation control circuit 10 detected by the temperature unit 110, so as to adjust the opening time and the triggering time interval of the silicon-controlled rectifier switch SSW1 in the power control circuit 12. For example, the temperature of one of the processor 104, the driving circuit 106, the phase detection circuit 108, the detection circuit 100 and the power start circuit 102.

In addition, when the voltage difference is smaller and positive, the processor 104 controls the phase of the trigger control signal to be delayed, that is, the trigger time intervals DT1, DT2, DT3, DT1', DT2', and DT3' in FIG5 are lengthened so that the output voltage gradually approaches the preset voltage, thereby achieving the function of voltage stabilization. On the contrary, when the voltage difference is larger and negative, the processor 104 controls the phase of the trigger control signal to be advanced, that is, the trigger time intervals DT1, DT2, DT3, DT1', DT2', and DT3' in FIG5 are shortened so that the output voltage gradually approaches the preset voltage, thereby achieving the function of voltage stabilization. This embodiment does not limit the operation of the processor 104 according to the voltage difference.

In addition, the processor 104 can also shorten or extend the on time ST1, ST2, ST3, ST1', ST2', ST3' of the trigger control signal to achieve the effect of voltage stabilization.

In this embodiment, the positions of the trigger control signals of the plurality of silicon-controlled rectifier switches SSW1-SSW3 can be adjusted according to actual needs, that is, the length, opening time, and even amplitude of the trigger control signal in each cycle are adjusted to control the silicon-controlled rectifier switches SSW1-SSW3.

[Beneficial Effects of Embodiments]

One of the beneficial effects of the present invention is that the vehicle charging circuit provided by the present invention obtains and analyzes multiple phase signals and obtains several operation parameter values to calculate the trigger phase, and the processor controls the drive circuit through the trigger phase, so that the drive circuit drives the power control circuit to convert the alternating current of the vehicle generator into a charging current, thereby stably charging the battery.

The above disclosed contents are only the preferred feasible embodiments of the present invention, and do not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the contents of the description and drawings of the present invention are included in the scope of the patent application of the present invention.

1: Car charging circuit 9: Car generator 8: Battery 7: Power switch 6: Car system 10: Calculation control circuit 12: Power control circuit 100: Detection circuit 102: Power start circuit 104: Processor 106: Drive circuit 108: Phase detection circuit 110: Temperature unit VT ₁ -VT ₆ , SSW1-SSW3: Silicon controlled rectifier switch RD1-RD3: First diode to third diode R, S, T: Three-phase DT1-DT3, DT1'-DT3': Trigger time interval ST1-ST3, ST1'-ST3': Open time S1-S3: Trigger control signal T1, T2: Cycle interval

FIG. 1 is a functional block diagram of a vehicle charging circuit according to an embodiment of the present invention.

FIG2 is a circuit diagram of the power control circuit in FIG1.

FIG3 is another circuit diagram of the power control circuit in FIG1.

4A, 4B and 4C are schematic diagrams of the phase detection circuit of FIG. 1 detecting single-phase or multi-phase phase signals.

FIG. 5 is a schematic diagram of a trigger control signal provided by the processor of FIG. 1 .

1: Car charging circuit 9: Car generator 8: Battery 7: Power switch 6: Car system 10: Operation control circuit 12: Power control circuit 100: Detection circuit 102: Power start circuit 104: Processor 106: Drive circuit 108: Phase detection circuit 110: Temperature unit

Claims (4)

A vehicle charging circuit is used to electrically connect a vehicle generator and a battery, the vehicle charging circuit comprising: a power control circuit electrically connected to the vehicle generator, the power control circuit comprising three silicon-controlled rectifier switches and three diodes, each of the silicon-controlled rectifier switches being connected to one of the diodes; and an operation control circuit electrically connected to the power control circuit, the vehicle generator and the battery, the operation control circuit comprising: a processor; a drive circuit electrically connected to the power control circuit and the processor; and A phase detection circuit electrically connected to the vehicle generator and the processor, wherein the vehicle generator is a three-phase generator, and the phase detection circuit is used to detect multiple phase signals of multiple power signals or multiple magnetic signals of the vehicle generator; wherein the processor divides and normalizes two of the multiple phase signals to obtain two corresponding normalized phase signals, and the processor calculates and analyzes the two normalized phase signals corresponding to two of the multiple phase signals to enable the processor to obtain at least one trigger phase, and provides multiple trigger control signals to the drive circuit according to the at least one trigger phase; The three silicon-controlled rectifier switches of the power control circuit include a first silicon-controlled rectifier switch, a second silicon-controlled rectifier switch, and a third silicon-controlled rectifier switch. The three diodes of the power control circuit include a first diode, a second diode, and a third diode. The first silicon-controlled rectifier switch includes a first end, a second end, and a control end. The second silicon-controlled rectifier switch includes a first end, a second end, and a control end. The third silicon-controlled rectifier switch includes a first end, a second end, and a control end. The first diode includes a first end and a second end. The second diode includes a first end and a second end. The third diode includes a first end and a second end. The first end of the first silicon-controlled rectifier switch, the first end of the second silicon-controlled rectifier switch, and the third silicon-controlled rectifier switch are connected to the power control circuit. The first ends of the first silicon-controlled rectifier switch are electrically connected to each other, the second end of the first silicon-controlled rectifier switch is electrically connected to the first end of the first diode, the second end of the second silicon-controlled rectifier switch is electrically connected to the first end of the second diode, the second end of the second silicon-controlled rectifier switch is electrically connected to the first end of the second diode, the second end of the first diode, the second end of the second diode and the second end of the third diode are electrically connected to each other, the first end of the first silicon-controlled rectifier switch, the first end of the second silicon-controlled rectifier switch and the first end of the third silicon-controlled rectifier switch are electrically connected to one end of the battery, and the second end of the first diode, the second end of the second diode and the second end of the third diode are electrically connected to the other end of the battery. A vehicle charging circuit as described in claim 1, wherein the phase detection circuit is arranged in the vehicle generator and is used to detect two of the phase signals of the multiple phase signals of the multiple power signals or multiple magnetic signals of the vehicle generator. A vehicle charging circuit as described in claim 2, wherein the processor calculates two corresponding trigger phases based on the multiple phase signals, and provides multiple trigger control signals to the drive circuit based on the two trigger phases, and the drive circuit controls the power control circuit according to the multiple trigger control signals to control the opening and closing of the three silicon-controlled rectifier switches of the power control circuit. A vehicle charging circuit as described in claim 3, wherein the processor adjusts a trigger time interval or a turn-on time of each of the two trigger control signals corresponding to the at least two trigger phases in each cycle, or adjusts a trigger time interval and a turn-on time of each of the multiple trigger control signals in each cycle.

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