Apparatus and method for controlling in-vehicle charger

Abstract

The invention relates to an apparatus and method for controlling an in-vehicle charger. An apparatus may perform the following: receiving a voltage value of an AC power and a frequency value of the AC power of an on-board charger through a phase-locked loop (PLL) to obtain voltage values of an active power and a reactive power of the AC power; generating a first control signal by determining a sign of an output signal of the PLL, the first control signal for controlling a first switch of an AC-AC converter of the on-board charger, including pulse width modulation (PWM) phase control for controlling a power direction; and generating a second control signal for controlling a second switch of an AC-DC converter of the on-board charger according to a duty cycle signal, the duty cycle signal being generated based on the voltage values of the active power and the reactive power of the AC power and the preset voltage command value of the active power and the voltage command value of the reactive power of the AC power.

Description

[0001] Cross-reference to related applications

[0002] This application claims the benefit of Korean Patent Application No. 10-2024-0069139, filed on May 28, 2024, which is incorporated herein by reference. Technical Field

[0003] This disclosure relates to an apparatus and method for controlling an on-board charger for a vehicle. Background Technology

[0004] Recently, with increasing public awareness of environmental issues, the market for environmentally friendly vehicles, such as hybrid, electric, and hydrogen fuel cell vehicles, is expanding rapidly.

[0005] In particular, among these environmentally friendly vehicles, plug-in hybrid electric vehicles (PHEVs) and electric vehicles (EVs) require a charging device that can receive AC power and charge high-voltage batteries to charge these vehicles. This charging device is called an on-board charger (OBC).

[0006] The aforementioned vehicle chargers typically include AC-AC converters, AC-DC converters, and electromagnetic interference (EMI) filters. The AC-AC converters are used for power factor control, the AC-DC converters are used for output control, and the EMI filters are used to meet electromagnetic wave performance requirements.

[0007] As on-board chargers, due to the increase in battery capacity, the wider range of battery voltage, and the changing charging requirements such as vehicle-to-grid (V2G) and vehicle-to-load (V2L), there may be a need for high-performance on-board chargers capable of bidirectional operation. On-board chargers with a single-stage structure capable of bidirectional operation, high efficiency / high power density, and charging / discharging modes are being researched to implement high-performance on-board chargers.

[0008] A single-stage on-board charger can have a structure that implements the roles of the AC-AC converter and AC-DC converter in an existing two-stage on-board charger as a single AC-DC converter. However, it may be difficult to use under V2L load conditions, where the RLC value is instantaneously switched when controlling a single-stage on-board charger, and problems exist when connecting inductive or capacitive loads, namely, the inability to perform reactive power. Summary of the Invention

[0009] According to embodiments of this disclosure, an apparatus and method for controlling an on-board charger for an environmentally friendly vehicle can be provided, wherein the active power axis and reactive power axis of the AC-DC converter of the vehicle on-board charger can be controlled separately, and the switching duty cycle and switching PWM phase of the AC-AC converter and AC-DC converter of the vehicle on-board charger can be controlled.

[0010] According to embodiments of this disclosure, an apparatus for controlling an on-board charger for an environmentally friendly vehicle may include a processor and a storage medium. The storage medium records one or more programs configured to be executable by the processor. When the processor executes one or more programs, it may perform the following operations: receive voltage values ​​and frequency values ​​of AC power from the on-board charger via a phase-locked loop (PLL) to obtain voltage values ​​of active power and reactive power of the AC power; generate a first control signal by determining the sign of the output signal of the PLL, the first control signal being used to control the switching operation of the AC-AC converter of the on-board charger, the operation including pulse width modulation (PWM) phase control for controlling the power direction; and generate a second control signal based on a duty cycle signal, the duty cycle signal being generated based on the voltage values ​​of active power and reactive power of the AC power and preset voltage command values ​​of active power and reactive power of the AC power, the second control signal being used to control the switching operation of the AC-DC converter of the on-board charger.

[0011] According to embodiments of this disclosure, a method for controlling an on-board charger for an environmentally friendly vehicle can be a method executed in a computing device including a processor and a storage medium storing one or more programs configured to be executable by the processor. The method may include: receiving voltage values ​​and frequency values ​​of the AC power of the on-board charger via a phase-locked loop (PLL) to obtain voltage values ​​of the active power and reactive power of the AC power; generating a first control signal by determining the sign of the output signal of the PLL, the first control signal being used to control the operation of the switching of the AC-AC converter of the on-board charger, the operation including pulse width modulation (PWM) phase control for controlling the power direction; and generating a second control signal based on a duty cycle signal generated from the voltage values ​​of the active power and reactive power of the AC power and preset voltage command values ​​of the active power and reactive power of the AC power, the second control signal being used to control the switching of the AC-DC converter of the on-board charger. Attached Figure Description

[0012] The above and other features and advantages of the embodiments of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings, wherein:

[0013] Figure 1 This is a schematic configuration diagram of an on-board charger system according to an embodiment of the present disclosure, the on-board charger system including equipment for controlling the on-board charger of an environmentally friendly vehicle;

[0014] Figure 2 It is a graph showing the signal waveforms of the main parts or operation of the device for controlling the on-board charger of an environmentally friendly vehicle according to an embodiment of the present disclosure;

[0015] Figure 3 This is a schematic configuration diagram of an apparatus for controlling an on-board charger for an environmentally friendly vehicle according to another embodiment of the present disclosure;

[0016] Figure 4A This is a diagram illustrating the control of active and reactive power of a device for controlling an on-board charger of an environmentally friendly vehicle according to an embodiment of the present disclosure;

[0017] Figure 4B This is a diagram illustrating the control of active and reactive power of an on-board charger for an environmentally friendly vehicle according to another embodiment of the present disclosure.

[0018] Figure 5 This is a graph simulating the control of an on-board charger device for an environmentally friendly vehicle according to an embodiment of this disclosure; and

[0019] Figure 6 This is a block diagram of a computing device that can fully or partially implement an on-board charger for an environmentally friendly vehicle according to embodiments of the present disclosure. Detailed Implementation

[0020] In the following description, specific exemplary embodiments of the present disclosure will be described with reference to the accompanying drawings. The following detailed description is provided to facilitate a thorough understanding of the methods, apparatus, and / or systems described herein. However, the disclosed embodiments are merely exemplary embodiments, and the present disclosure is not necessarily limited thereto.

[0021] In describing exemplary embodiments of this disclosure, detailed descriptions of known technologies related to this disclosure may be omitted if it is determined that such detailed descriptions might unnecessarily obscure the subject matter of this disclosure. Additionally, terms to be described later may be terms defined in consideration of functionality in the exemplary embodiments of this disclosure, and for other embodiments, these terms may vary according to the intent or habit of the user or operator. The terminology used in the detailed description is intended only to describe exemplary embodiments of this disclosure and should not be construed as limiting in any way. Unless expressly used otherwise, singular expressions may include plural forms. Throughout this specification, expressions such as “comprising” or “including” are intended to refer to any feature, number, step, operation, element, part, or combination thereof, and one or more other than those described, and should not be construed as excluding the presence or possibility of any other feature, number, step, operation, element, part, or combination thereof.

[0022] Figure 1 This is a schematic configuration diagram of an on-board charger system according to an embodiment of the present disclosure, the on-board charger system including equipment for controlling the on-board charger of an environmentally friendly vehicle.

[0023] Reference Figure 1 According to embodiments of this disclosure, the on-board charger system for environmentally friendly vehicles may include an on-board charger 10 and a device 100 for controlling the on-board charger of the environmentally friendly vehicle.

[0024] First, the on-board charger 10 can have a structure that implements the roles of the AC-AC converter and AC-DC converter in an existing two-stage on-board charger as a single AC-DC converter. It can be a single-stage topology based on an interleaved totem-pole, which includes an AC-AC converter 11, a transformer 12, and an AC-DC converter 13. The single-stage topology can implement the high-frequency transformer 12 and can reduce high-frequency ripple on the AC side. Therefore, the single-stage topology can be a topology with a high probability of achieving high efficiency / high power density, where the AC fundamental ripple is removed from the transformer in the high-frequency transformer 12.

[0025] AC-AC converter 11 may include a first to a sixth switch (S1 to S6), which performs operations to control the PWM phase to determine the power direction and AC-AC conversion. AC-DC converter 13 may include a seventh to a tenth switch (S7 to S8). 10 ), the seventh to tenth switches (S7 to S) 10The device 100, used to control the on-board charger of an environmentally friendly vehicle, can control the switching operations of the first to sixth switches (S1 to S6) of the AC-AC converter 11 and the seventh to tenth switches (S7 to S8) of the AC-DC converter 13. 10 ( ) switch operation.

[0026] The device 100 for controlling the on-board charger of an environmentally friendly vehicle according to an embodiment of the present disclosure may include a phase-locked loop 110, a first sign determiner 120, a voltage controller 130, a converter 140, a second sign determiner 150, a triangular wave generator 160, a first calculator 170, and a pulse width modulation (PWM) generator 180.

[0027] The phase-locked loop 110 can receive the voltage value (Vac_sen) and frequency value (fac_ref) of the AC power of the on-board charger 10 to lock its phase.

[0028] The first sign determiner 120 can generate a first control signal by determining the sign of the output signal (cosθ) output from the phase-locked loop 110, and generate and output the control signal. The first control signal is used to control the switching operation of the AC-AC converter 11. The control signal is a part of the first control signal and is used to control the switching operation of the fifth switch and the sixth switch (S5 and S6) among the first to sixth switches (S1 to S6) of the AC-AC converter 11.

[0029] Voltage controller 130 can receive active power voltage command values ​​(Vac_d_ref) (d-axis voltage command value) and reactive power voltage command values ​​(Vac_q_ref) (q-axis voltage command value) of AC power voltage (Vac). Active power voltage command values ​​(Vac_d_ref) (d-axis voltage command value) and reactive power voltage command values ​​(Vac_q_ref) (q-axis voltage command value) can be received from a higher-level controller (not shown). Additionally, active power voltage values ​​(Vac_d_sen) (d-axis voltage) and reactive power voltage values ​​(Vac_q_sen) (q-axis voltage) obtained by detecting the AC power voltage can be received from phase-locked loop 110. Voltage controller 130 may include a d-axis voltage controller 131 and a q-axis voltage controller 132. The d-axis voltage controller 131 can receive the active power voltage value (Vac_d_sen) (d-axis voltage) and the active power voltage command value (Vac_d_ref) (d-axis voltage command value) to generate a first duty cycle Dd, which is used to control the active power voltage. The q-axis voltage controller 132 can receive the reactive power voltage value (Vac_q_sen) (q-axis voltage) and the reactive power voltage command value (Vac_q_ref) (q-axis voltage command value) to generate a second duty cycle Dq, which is used to control the reactive power voltage.

[0030] The converter 140 can convert the dq axis, which represents the duty cycle of active and reactive power, into a three-phase abc axis (dq to abc).

[0031] The second sign determiner 150 can determine the sign of the signal obtained by multiplying the conversion result (Da*) of the converter 140 with the output signal (cosθ) output from the phase-locked loop 110.

[0032] The triangular wave generator 160 can generate a primary carrier signal (Cp) and a secondary carrier signal (Cs) based on a sign (φ_sign) obtained by multiplying the determination result of the second sign determiner 150 by the phase (φ) of a preset phase signal. Depending on the phase (φ) of the phase signal, there may be a phase difference between the primary carrier signal (Cp) and the secondary carrier signal (Cs).

[0033] The first calculator 170 can calculate the conversion result from the converter 140 by a preset multiple. For example, the first calculator 170 can multiply the conversion result from the converter 140 by 0.5.

[0034] The PWM generator 180 may include a first PWM generator 182 and a second PWM generator 181. The first PWM generator 182 can generate a first control signal for controlling the switching operation of the AC-AC converter 11 based on the main-side carrier signal (Cp) from the triangular wave generator 160 and a preset main-side PWM duty cycle (Dp), and generate and output a residual control signal of the first control signal. This residual control signal is used to control the switching operation of the first to fourth switches (S1 to S4) of the first to sixth switches (S1 to S6) of the AC-AC converter 11. The main-side PWM duty cycle (Dp) can be set according to the voltage value of the AC power of the on-board charger 10, and can be fixed to one of the values ​​between 0 and 1. For example, when the received voltage value of the AC power is 220V, the main-side PWM duty cycle (Dp) can be set to 0.5, and when the received voltage value of the AC power is 110V, the main-side PWM duty cycle (Dp) can be set to 0.3. The secondary PWM generator 181 can generate the seventh to tenth switches (S7 to S8) for controlling the AC-DC converter 13 based on the secondary carrier signal (Cs) from the triangular wave generator 160 and the secondary PWM duty cycle (Ds) from the first calculator 170. 10 The second control signal is used to switch the device, and the second control signal is output. The duty cycle (Ds) of the secondary PWM can be the result of calculation by the first calculator 170.

[0035] Figure 2 This is a graph showing the signal waveforms of the main components or operation of the device for controlling the on-board charger of an environmentally friendly vehicle according to an embodiment of the present disclosure.

[0036] Figure 1 The identification codes ③, ⑥, ⑦, ⑧, ⑩ and are used during the operation of the main operating part of the equipment controlling the on-board charger of environmentally friendly vehicles. The signal waveform in Figure 2 The same identification codes ③, ⑥, ⑦, ⑧, ⑩ and express.

[0037] Reference Figure 2 and Figure 1In the operation of the device for controlling the on-board charger of an environmentally friendly vehicle according to an embodiment of the present disclosure, or in the operation of a major part thereof, the device 100 for controlling the on-board charger of an environmentally friendly vehicle according to an embodiment of the present disclosure may perform the following operations: receiving the voltage value and frequency value of the AC power of the on-board charger 10 to obtain the voltage value of the active power and the voltage value of the reactive power of the AC power (identification codes ① and ②); generating a first control signal for controlling the operation of the switch of the AC-AC converter 11 of the on-board charger 10 by determining the symbol of the carrier signal by a phase-locked loop (identification codes ③, ⑦, ⑧, ⑨ and ⑩); and generating a second control signal for controlling the operation of the switch of the AC-DC converter 13 of the on-board charger 10 according to a duty cycle signal (identification codes ④, ⑤, ⑥ and ⑩). The duty cycle signal is generated based on the voltage values ​​of the active power and reactive power of the AC power, as well as the preset voltage command values ​​of the active power and reactive power.

[0038] More specifically, firstly, the device 100 for controlling the on-board charger of an environmentally friendly vehicle according to an embodiment of this disclosure can receive active power voltage command values ​​(Vac_d_ref) and reactive power voltage command values ​​(Vac_q_ref) (identification code ①) of the AC power voltage (Vac) from a higher-level controller. Typically, when the on-board charger 10 operates in V2L mode, the active power voltage command value (Vac_d_ref) can be twice the peak voltage (RMS) of the AC power, and the reactive power voltage command value (Vac_q_ref) can be zero. Phase-locked loop 110 can receive the frequency value of AC power from a higher-level controller (not shown), and receive the voltage value (Vac_sen) of AC power detected by a voltage sensor (not shown), and output the voltage value (d-axis voltage) of active power (Vac_d_sen) and the voltage value (q-axis voltage) of reactive power (Vac_q_sen), which are obtained by detecting the voltage of AC power using the phase difference between the input signal and the output signal (identification code ②).

[0039] In the operation (identification codes ③, ⑦, ⑧, ⑨ and ⑩) of generating a first control signal for controlling the switching operation of the AC-AC converter 11 of the on-board charger 10 by determining the sign of the carrier signal by the phase-locked loop, the output signal (cosθ) of the phase-locked loop 110 can be a value in phase with the load voltage command value (Vac_ref) from the upper controller (not shown) (Vac_ref = Vac_d_ref * cosθ), and the first sign determiner 120 can generate a control signal (identification code ③) by determining the sign (+1 / -1) of the output signal (cosθ) of the phase-locked loop 110, which is part of the first control signal for controlling the switching operation of the fifth switch S5 and the sixth switch S6 of the AC-AC converter.

[0040] The output signal (cosθ) of phase-locked loop 110 can be transmitted to the second sign determiner 150, and the second sign determiner 150 can determine the sign (+1 / -1) (identification code ⑦) of the signal obtained by multiplying the conversion result (Da*) of converter 140 with the output signal (cosθ) from phase-locked loop 110. The sign determination result of the second sign determiner 150 can be multiplied by the phase (φ) of the phase signal, and the signal (φ_sign) obtained by multiplying the determination result of the second sign determiner 150 by the phase (φ) of the phase signal can be transmitted to the triangular wave generator 160.

[0041] The triangular wave generator 160 can generate a primary carrier signal (Cp) and a secondary carrier signal (Cs) (identification code ⑧) based on a signal (φ_sign) obtained by multiplying the determination result of the second sign determiner 150 by the phase (φ) of a preset phase signal. Depending on the phase (φ) of the phase signal, a phase difference may exist between the primary carrier signal (Cp) and the secondary carrier signal (Cs). Based on the sign of the signal (φ_sign) obtained by multiplying the determination result of the second sign determiner 150 by the phase (φ) of the preset phase signal, the phases of the primary carrier signal (Cp) and the secondary carrier signal (Cs) can lead or lag, thus allowing the determination of the direction of power flow. In other words, when the sign of the signal (φ_sign) obtained by multiplying the determination result of the second sign determiner 150 by the phase (φ) of the preset phase signal is "-", power can be transmitted in the direction from AC to DC. And when the sign of the signal (φ_sign) obtained by multiplying the determination result of the second sign determiner 150 by the phase (φ) of the preset phase signal is "+", power flows in the direction from DC to AC. Here, "-" means that the phase of the main side (AC side) PWM controlling the AC-AC converter 11 precedes the phase of the secondary side (DC side) PWM controlling the AC-DC converter 13, and "+" means that the phase of the secondary side PWM precedes the phase of the main side PWM.

[0042] The first PWM generator 182 of the PWM generator 180 can generate a residual control signal (identification code 10) of the first control signal based on the main-side carrier signal (Cp) from the triangular wave generator 160 and a preset main-side PWM duty cycle (Dp) (identification code 9). This residual control signal controls the switching operation of the first to fourth switches (S1 to S4) of the first to sixth switches (S1 to S6) of the AC-AC converter 11. The duty cycle (Dp) of the main-side PWM is a fixed value, which can be set from 0 to 1 and can be specified according to the input voltage.

[0043] The operation of generating a second control signal (identification codes ④, ⑤, ⑥) based on the duty cycle signal to control the switching of the AC-DC converter 13 of the on-board charger 10. In this context, the duty cycle signal is generated based on the voltage values ​​of active power and reactive power of AC power, as well as the preset voltage command values ​​of active power and reactive power. The d-axis voltage controller 131 of the voltage controller 130 can receive the voltage value of active power (Vac_d_sen) (d-axis voltage) and the voltage command value of active power (Vac_d_ref) (d-axis voltage command value) to generate a first duty cycle (Dd) for controlling the voltage of active power. The q-axis voltage controller 132 can receive the voltage value of reactive power (Vac_q_sen) (q-axis voltage) and the voltage command value of reactive power (Vac_q_ref) (q-axis voltage command value) to generate a second duty cycle (Dd) for controlling the voltage of reactive power (identification codes ④ and ⑤). In other words, the d-axis voltage controller 131 can output a first duty cycle (Dd) (identification code ④) by controlling the voltage value of active power (Vac_d_sen) to follow the voltage command value of active power (Vac_d_ref). Additionally, the q-axis voltage controller 132 can output a second duty cycle (Dq) (identification code ⑤) by controlling the voltage value of reactive power (Vac_q_sen) to follow the voltage command value of reactive power (Vac_q_ref).

[0044] Converter 140 can convert the dq axis, which represents the duty cycles of active and reactive power (Dd, Dq), into a three-phase abc axis (dq to abc) (identification code ⑥). First calculator 170 can obtain the secondary PWM duty cycle (Ds) by multiplying the conversion result from converter 140 by 0.5. The reason for multiplying by 0.5 here is to ensure that the value of the secondary PWM duty cycle (Ds) does not exceed, for example, 50% (0.5) of the secondary carrier signal (Cs).

[0045] The second PWM generator 181 of the PWM generator 180 can generate the seventh to tenth switches (S7 to S8) for controlling the AC-DC converter 13 based on the secondary carrier signal (Cs) and the secondary PWM duty cycle (Ds) from the triangular wave generator 160. 10 The second control signal for the switch operation is given, and the second control signal (identification code) is output. ).

[0046] Figure 3 This is a schematic configuration diagram of an on-board charger for an environmentally friendly vehicle according to another embodiment of the present disclosure.

[0047] Reference Figure 3 ,and Figure 1 Compared to the device 100 for controlling an on-board charger of an environmentally friendly vehicle according to an embodiment of the present disclosure, the device for controlling an on-board charger of an environmentally friendly vehicle according to another embodiment of the present disclosure may further include a phase signal conditioner 290.

[0048] Phase signal conditioner 290 can adjust the phase (φ) of the phase signal based on the current (Iac_sen) of the AC power of the on-board charger. Phase signal conditioner 290 may include a second calculator 291 and a phase conditioner 292. The second calculator 291 can calculate the root mean square (RMS) value or maximum value of the load current of the on-board charger. Phase conditioner 292 can adjust the phase (φ) of the phase signal based on the calculated RMS value or maximum value of the load current. Based on the calculated RMS value or maximum value of the load current, the phase (φ) of the phase signal can be adjusted according to a mapping in which the relationship between the RMS value or maximum value of the load current and the phase is preset (identification code). ).

[0049] In addition to the second calculator 291 and phase adjuster 292 of the phase signal adjuster 290 mentioned above, Figure 3 The phase-locked loop 210, first sign determiner 220, voltage controller 230, converter 240, second sign determiner 250, triangular wave generator 260, first calculator 270, and PWM generator 280 of the device for controlling the on-board charger of an environmentally friendly vehicle, as shown in another embodiment of this disclosure, are respectively connected to... Figure 1 The phase-locked loop 110, first sign determiner 120, voltage controller 130, converter 140, second sign determiner 150, triangular wave generator 160, first calculator 170 and PWM generator 180 of the device for controlling the on-board charger of an environmentally friendly vehicle shown according to an embodiment of this disclosure have the same configuration and operation, and therefore a further detailed description thereof will be omitted.

[0050] Figure 4A It shows Figure 1 a diagram of the control of the active power and reactive power of a device for controlling an on-vehicle charger of an eco-friendly vehicle according to an embodiment of the present disclosure. Figure 4B It schematically shows Figure 3 a diagram of the control of the active power and reactive power of a device for controlling an on-vehicle charger of an eco-friendly vehicle according to another embodiment of the present disclosure.

[0051] As described above, in the device for controlling an on-vehicle charger of an eco-friendly vehicle in the present disclosure, the voltage (d-axis) of the active power and the voltage (q-axis) of the reactive power are respectively converted on the secondary side of the device as an AC-DC converter, and the primary side of the device as an AC-AC converter shows the control thereof when applying a fixed phase (φ) value in Figure 4A .

[0052] Referring to Figure 4A , the maximum control range can be determined by Dd_max*φ_fix and Dq_max*φ_fix, and the magnitude and phase value can be determined by the first duty ratio (Dd) and the second duty ratio (Dq).

[0053] Referring to Figure 4B , a case where the phase (φ) value is set to be mapped (φ1 < φ2) according to the current magnitude (Iac1 < Iac2) is briefly and schematically shown.

[0054] The magnitude and phase can be controlled by using the first duty ratio (Dd) and the second duty ratio (Dq), and the control stability under low load and high load can be achieved by appropriately controlling the phase (φ) value. Therefore, by using one of the embodiments of the present disclosure, stable control can be achieved even in a region where it cannot be controlled conventionally.

[0055] Figure 5 It is a graph showing the simulation of the control of a control device for an on-vehicle charger of an eco-friendly vehicle according to an embodiment of the present disclosure.

[0056] More specifically, this is, for example, a V2L operation waveform simulated under the conditions of apparent power S = 7.2 kVA and power factor correction value PF = 0.9 by connecting an RL load to the alternating current (AC) side of the on-vehicle charger. As a result of the simulation, it can be seen that the appearance of θ depends on the reactive power consumption of the load under the load voltage (V Load ).

[0057] It can be seen that the secondary side PWM duty ratio (Ds) can follow the current shape of the AC power, and maintain this shape in the absence of the fast discharge part V cc , eliminating the distortion of the voltage shape of the AC power and maintaining the total harmonic distortion (THD).

[0058] It has been confirmed that instantaneous power direction changes are responded to by a change in the polarity of the phase (φ) in the corresponding part, and it can be confirmed that the device for controlling the on-board charger of an environmentally friendly vehicle according to the embodiments of this disclosure can smoothly perform control operations in V2G mode and V2L mode.

[0059] Figure 6 This is a block diagram of a computing device that can fully or partially implement an on-board charger control device for environmentally friendly vehicles according to embodiments of this disclosure, and can be... Figure 1 The on-board charger control device and / or shown Figure 3 The on-board charger control device 200 shown is shown.

[0060] like Figure 6 As shown, the computing device 400 may include at least one processor 401, a computer-readable storage medium 402, and a communication bus 403, any combination or all of which may be a plurality of or may include a plurality of components therein.

[0061] Processor 401 can cause computing device 400 to operate according to the example embodiments described above. For example, processor 401 can execute one or more programs stored in computer-readable storage medium 402. The one or more programs may include one or more computer-executable instructions, wherein, when executed by processor 401, the computer-readable executable instructions can be configured to cause computing device 400 to perform operations according to the example embodiments of this disclosure.

[0062] Computer-readable storage medium 402 may be configured to store computer-executable instructions or program code, program data, and / or other suitable forms of information. Program 402a stored on computer-readable storage medium 402 may include a set of instructions executable by processor 401. In embodiments, computer-readable storage medium 402 may include memory (such as volatile memory, non-volatile memory, or any suitable combination thereof), one or more disk storage devices, optical disk storage devices, flash memory devices, other forms of storage media accessible by computing device 400 and storing desired information, or any suitable combination thereof.

[0063] The communication bus 403 interconnects various other components of the computing device 400, including the processor 401 and the computer-readable storage medium 402.

[0064] The computing device 400 may include one or more input / output interfaces 405 and one or more network communication interfaces 406 providing interfaces for one or more input / output devices 404. The input / output interfaces 405 and network communication interfaces 406 may be connected to a communication bus 403. Input / output devices 404 may be connected to other components of the computing device 400 via input / output interfaces 405. For example, an example input / output device 404 may include input and output devices, such as pointing devices (mouse, trackpad, etc.), keyboards, touch input devices (touchpad, touchscreen, etc.), voice or sound input devices, various types of sensor devices and / or photographic devices, and output devices such as display devices, printers, speakers and / or network interface cards (NICs). An example input / output device 404 may be included within the computing device 400 as a component constituting the computing device 400, or it may be connected to the computing device 400 as a separate device.

[0065] Embodiments of this disclosure may include a program for performing the methods described herein on a computer, and a computer-readable recording medium including the program. The computer-readable recording medium may include program instructions, local data files, local data structures, etc., either individually or in combination. The medium may be specifically designed and configured for this disclosure, or it may be common in the field of computer software. Examples of computer-readable media may include magnetic media such as hard disks, floppy disks, and magnetic tapes; optical recording media such as CD-ROMs and DVDs; and hardware devices specifically configured to store and execute program instructions, such as ROMs, RAMs, and flash memory. Examples of programs may include not only machine language code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter.

[0066] As described above, the embodiments of this disclosure can solve the problem that it may be difficult to use under V2L load conditions, where the RLC value is instantaneously switched when the charger is controlled, and reactive power control may not be performed when an inductive or capacitive load is connected.

[0067] The embodiments disclosed herein are not limited to the exemplary embodiments and drawings described above, but are defined by the appended claims. Therefore, those skilled in the art can make various substitutions, modifications, changes, and equivalent solutions without departing from the scope of this disclosure as defined by the appended claims.

Claims

1. A device for controlling an on-board charger for a vehicle, the device comprising: One or more processors; as well as A storage medium storing computer-readable instructions that, when executed by the one or more processors, cause the one or more processors to: The first voltage value of the AC power (i.e., AC power) and the frequency value of the AC power are received by the phase-locked loop (PLL) to obtain a second voltage value of the active power and a third voltage value of the reactive power of the AC power. A first control signal is generated by determining the first sign of the PLL output signal. This first control signal controls a first operation of the first switching group of the on-board charger's AC-to-AC converter (AC-AC converter). The first operation includes pulse-width modulation (PWM) phase control of the power direction, and... A second control signal is generated based on the duty cycle signal. The duty cycle signal is generated based on the second voltage value of the active power of the AC power, the third voltage value of the reactive power of the AC power, the preset first voltage command value of the active power, and the second voltage command value of the reactive power. The second control signal controls the second operation of the second switching group of the AC-DC converter of the vehicle charger.

2. The device according to claim 1, wherein, When generating the first control signal, the instruction further causes the one or more processors to: By determining the first sign of the PLL output signal, a first part of the first control signal is generated, and the first part controls the fifth and sixth switches in the first switch group of the AC-AC converter of the on-board charger. as well as By determining the second symbol of the second signal, a second part of the first control signal is generated. The second signal is obtained by multiplying the PLL output signal of the PLL with the three-phase conversion signal of the duty cycle signal. The second part controls the first to fourth switches in the first switch group of the AC-AC converter of the on-board charger.

3. The device according to claim 2, wherein, When generating the second portion of the first control signal, the instruction further causes the one or more processors to: Determine the second sign of the second signal obtained by multiplying the PLL output signal of the PLL with the three-phase conversion signal of the duty cycle signal; Based on the result of multiplying the second symbol of the multiplied signal by a preset phase signal, a primary carrier signal and a secondary carrier signal are generated. as well as The second part of the first control signal is generated based on the main-side carrier signal and the preset main-side PWM duty cycle.

4. The device according to claim 3, wherein, When generating the second portion of the first control signal, the instruction further causes the one or more processors to adjust the phase of the phase signal according to the current of the AC power of the on-board charger.

5. The device according to claim 4, wherein, When adjusting the phase of the phase signal, the instruction further causes the one or more processors to: Calculate the root mean square (RMS) value of the current of the AC power of the on-board charger or the maximum value of the current of the AC power. as well as The phase of the phase signal is adjusted based on the calculated RMS value or maximum value of the current of the AC power.

6. The device according to claim 3, wherein, When generating the second control signal, the instruction further causes the one or more processors to: Based on the second voltage value of the active power and the third voltage value of the reactive power of the AC power, as well as the preset first voltage command value of the active power and the second voltage command value of the reactive power of the AC power, a second duty cycle signal of the active power and a third duty cycle signal of the reactive power are generated. The second duty cycle signal of the active power and the third duty cycle signal of the reactive power are converted into three-phase duty cycle signals. as well as The second control signal is generated based on the secondary PWM duty cycle and the secondary carrier signal. The secondary PWM duty cycle is obtained by calculating the three-phase duty cycle signal at a preset ratio.

7. A method for controlling an on-board charger for a vehicle, the method comprising: The first voltage value and the frequency value of the AC power from the on-board charger are received by the phase-locked loop (PLL) to obtain the second voltage value of the active power and the third voltage value of the reactive power of the AC power. A first control signal is generated by determining the first sign of the PLL output signal. This first control signal controls the first switching group of the AC-to-AC converter (AC-AC converter) of the on-board charger, including pulse width modulation phase control (PWM phase control) to control the power direction. A second control signal is generated based on the duty cycle signal. The duty cycle signal is generated based on the second voltage value of the active power of the AC power and the third voltage value of the reactive power, as well as the preset first voltage command value of the active power of the AC power and the second voltage command value of the reactive power. The second control signal controls the second switching group of the AC-DC converter of the vehicle charger.

8. The method according to claim 7, wherein, Generating the first control signal includes: A first portion of the first control signal is generated by determining the first symbol of the PLL output signal, and the first portion controls the fifth and sixth switches in the first switch group of the AC-AC converter of the on-board charger; and By determining the second symbol of the second signal, a second part of the first control signal is generated. The second signal is obtained by multiplying the PLL output signal of the PLL with the three-phase conversion signal of the duty cycle signal. The second part controls the first to fourth switches in the first switch group of the AC-AC converter of the on-board charger.

9. The method according to claim 8, wherein, The second part of generating the first control signal includes: Determine the second sign of the second signal obtained by multiplying the PLL output signal of the PLL with the three-phase conversion signal of the duty cycle signal; Based on the result of multiplying the second symbol of the multiplied signal by a preset phase signal, a primary carrier signal and a secondary carrier signal are generated; and The second part of the first control signal is generated based on the main-side carrier signal and the preset main-side PWM duty cycle.

10. The method according to claim 9, wherein, The second part of generating the first control signal further includes adjusting the phase of the phase signal according to the current of the AC power of the on-board charger.

11. The method according to claim 10, wherein, Adjusting the phase of the phase signal includes: Calculate the root mean square (RMS) value or maximum value of the current for the AC power of the on-board charger; and The phase of the phase signal is adjusted based on the calculated RMS value or maximum value of the current of the AC power.

12. The method according to claim 9, wherein, Generating the second control signal includes: Based on the second voltage value of the active power and the third voltage value of the reactive power of the AC power, as well as the preset first voltage command value of the active power and the second voltage command value of the reactive power of the AC power, a second duty cycle signal of the active power and a third duty cycle signal of the reactive power are generated. The second duty cycle signal of the active power and the third duty cycle signal of the reactive power are converted into three-phase duty cycle signals; and The second control signal is generated based on the secondary-side PWM duty cycle and the secondary-side carrier signal, wherein the secondary-side PWM duty cycle is obtained by calculating the three-phase duty cycle signal at a preset ratio.

13. An apparatus for controlling an on-board charger for a vehicle, wherein the on-board charger includes an AC-to-AC converter and an AC-to-DC converter, the apparatus comprising: Phase-locked loop, or PLL: The first voltage used to detect the AC power of the vehicle charger is... The first frequency of the AC power of the on-board charger is detected. Based on the first voltage of the AC power, the sensed d-axis voltage value of active power and the sensed q-axis voltage value of reactive power are generated and output, and Output PLL output signal; First symbol determiner: Receive the PLL output signal from the PLL. Determine the first symbol of the PLL output signal, and As a first part of generating a first control signal for controlling the first switch group of the AC-AC converter, the first part of the first control signal is generated based on the first symbol and the PLL output signal. This first part of the first control signal controls the fifth and sixth switches in the first switch group of the AC-AC converter. The first part of the first control signal is output to the fifth and sixth switches of the AC-AC converter; The first voltage controller includes a d-axis voltage controller and a q-axis voltage controller, wherein the first voltage controller: The first voltage, based on AC power, is used by the d-axis voltage controller to receive the d-axis voltage command value of active power. Based on the first voltage of AC power, the q-axis voltage controller receives the q-axis voltage command value of reactive power. The active power is received from the PLL by the d-axis voltage controller via the d-axis voltage controller. The q-axis voltage controller receives the sensed q-axis voltage value of the reactive power from the PLL. Based on the d-axis voltage command value and the sensed d-axis voltage value, the d-axis voltage controller generates and outputs a first duty cycle, which controls the active voltage of the active power. Based on the q-axis voltage command value and the sensed q-axis voltage value, the q-axis voltage controller generates and outputs a second duty cycle, which controls the reactive voltage of the reactive power. First converter: Receive the first duty cycle from the d-axis voltage controller. Receive the second duty cycle from the q-axis voltage controller, and The three-phase shaft duty cycle is generated and output based on the first duty cycle and the second duty cycle; second sign determiner: Receive the PLL output signal from the PLL. Determine the first symbol of the PLL output signal. Receive the three-phase shaft duty cycle from the first converter, and Multiply the first sign by the three-phase shaft duty cycle to output the first signed three-phase shaft duty cycle; Triangle wave generator: Receive the first signed three-phase shaft duty cycle from the second sign determiner. Receive the first phase, Multiply the first signed three-phase shaft duty cycle by the first phase to generate the first phase sign, and Generate and output the primary carrier signal and the secondary carrier signal based on the first phase symbol; First calculator: Receive the three-phase shaft duty cycle from the first converter, and Multiply the three-phase shaft duty cycle by a preset multiplier to output the secondary PWM duty cycle; First PWM generator: Receive the main-side carrier signal from the triangular wave generator. Receive the preset main-side PWM duty cycle. As a second part of generating the first control signal for controlling the first switch group of the AC-AC converter, based on the main-side carrier signal and the preset main-side PWM duty cycle, the second part generates the first control signal, which controls the first to fourth switches in the first switch group of the AC-AC converter. The second portion of the first control signal is output to the first to the fourth switches of the AC-AC converter; and Second PWM generator: The secondary carrier signal is received from the triangular wave generator. The secondary PWM duty cycle is received from the first calculator. Based on the secondary carrier signal from the triangular wave generator and the secondary PWM duty cycle from the first calculator, a second control signal is generated. This second control signal controls the second switching group of the AC-DC converter. The second control signal is output to the seventh to tenth switches of the second switch group of the AC-DC converter.

14. The device according to claim 13, wherein, The device includes: One or more processors; and The storage medium stores computer-readable instructions that, when executed by the one or more processors, cause the one or more processors to provide the functions and operations of the PLL, the first sign determiner, the first voltage controller, the first converter, the second sign determiner, the triangular wave generator, the first calculator, the first PWM generator, and the second PWM generator.

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