Phase-shifted full-bridge DCDC converter, phase-shifted modulation method and device thereof, and medium

Abstract

The invention discloses a phase-shifted full-bridge DCDC converter and a phase-shifted modulation method and device thereof, and a medium, and the method comprises the steps: in a control circuit operation AUTOSAR architecture application layer, calculating a phase-shifted angle control quantity according to an output feedback signal of the phase-shifted full-bridge DCDC converter; transmitting the phase shift angle control quantity to a bottom complex driving layer through a runtime environment of the AUTOSAR architecture; in the complex driving layer, configuring registers of a universal timer module and a dead zone module of a microcontroller in the control circuit according to the phase shift angle control quantity so as to modulate and generate corresponding PWM driving signals; and inputting the PWM driving signal generated by modulation to a corresponding switch tube in the phase-shifted full-bridge main circuit, thereby realizing phase-shifted control of the phase-shifted full-bridge DCDC converter. According to the invention, the technical problem that real-time, accurate and reliable phase-shift PWM control of the phase-shift full-bridge circuit is difficult to realize in a vehicle specification standardization AUTOSAR development environment is solved.

Description

Technical Field

[0001] This invention relates to the field of on-board power supply technology for new energy vehicles, specifically to a phase-shifted full-bridge DC-DC converter and its phase-shifting modulation method, device, and medium. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the integration of vehicle electrical architecture has become an important technological trend in the industry. In traditional new energy vehicles, the on-board DC-DC converter and motor drive system, as core high-voltage electrical components, generally adopt independent control architecture design: the DC-DC controller and the motor controller (MCU) belong to different hardware platforms, each with independent microcontroller units, power devices and peripheral circuits.

[0003] However, with the popularization of 800V high-voltage platforms and the evolution of domain control architecture, traditional distributed control schemes have gradually revealed significant limitations: (1) hardware redundancy leads to high system complexity and increased costs; (2) communication delay between control units restricts the dynamic coordination control of the system; (3) it is difficult to meet the needs of high efficiency, flexibility and scalability. AUTOSAR (Automotive Open System Architecture) is a standardized and modular software architecture that has shown significant advantages in improving the development efficiency, maintainability and portability of automotive electronic control systems, but it has not yet been widely used in the field of DC-DC control, especially in the integrated design with motor control systems.

[0004] Therefore, how to solve the problem of the lack of phase-shifting modulation technology for phase-shifting full-bridge circuits based on AUTOSAR in the deep integration of DC-DC and motor control has become an urgent technical problem to be solved. Summary of the Invention

[0005] To address the shortcomings of the existing technologies, this invention provides a phase-shifted full-bridge DC-DC converter and its phase-shifting modulation method, device, and medium, solving the technical problem of achieving real-time, accurate, and reliable phase-shifted PWM control of the phase-shifted full-bridge circuit in an automotive-grade standardized development environment.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A phase-shifted full-bridge DC-DC converter includes: a phase-shifted full-bridge main circuit and a control circuit;

[0008] The phase-shifted full-bridge main circuit includes a primary-side full-bridge circuit, a high-frequency transformer (T), and a secondary-side rectifier and filter circuit.

[0009] The primary-side full-bridge circuit includes a first switch (Q1), a second switch (Q2), a third switch (Q3), a fourth switch (Q4), and a first clamping diode (D). C1), second clamping diode (D) C2 The first switch (Q1), the second switch (Q2), the cathode of the first clamping diode, and the positive terminal of the input filter capacitor are connected together; the third switch (Q3), the fourth switch (Q4), the anode of the second clamping diode, and the negative terminal of the input filter capacitor are connected together; the drain of the first switch (Q1), the source of the third switch (Q3), and the source of the third switch (Q3) are connected to one end of the leakage inductance (Lr), and the other end of the leakage inductance (Lr) is connected to the same-name terminal of the primary winding of the high-frequency transformer (T); the drain of the second switch (Q2), the source of the fourth switch (Q4), and the DC blocking capacitor (C) are connected to one end of the DC blocking capacitor (C), and the other end of the DC blocking capacitor (C) is connected to the opposite-name terminal of the primary winding of the high-frequency transformer (T);

[0010] The secondary-side rectifier and filter circuit includes a first synchronous rectifier (SR1), a second synchronous rectifier (SR2), an output filter inductor (L2), and an output filter capacitor (Co). The secondary side of the high-frequency transformer (T) adopts a double-winding structure with a center tap, wherein the same-name terminal of the first secondary winding is connected to the source of the second synchronous rectifier (SR2), and the opposite-name terminal of the second secondary winding is connected to the source of the first synchronous rectifier (SR1). The drains of the first synchronous rectifier (SR1) and the second synchronous rectifier (SR2) are connected together and then connected to the negative terminal of the output filter capacitor (Co). The center tap is connected to the positive terminal of the output filter capacitor (Co) through the output filter inductor (L2).

[0011] The control circuit is connected to the control terminals of each switching transistor in the phase-shifted full-bridge main circuit.

[0012] A phase-shifting modulation method for a phase-shifting full-bridge DC-DC converter, applied to a phase-shifting full-bridge DC-DC converter, the phase-shifting modulation method comprising:

[0013] S1. In the AUTOSAR architecture application layer of the control circuit, the phase shift angle control quantity is calculated based on the output feedback signal of the phase-shifted full-bridge DC-DC converter.

[0014] S2. The phase shift angle control quantity is transmitted to the underlying complex driving layer through the runtime environment of the AUTOSAR architecture;

[0015] S3. In the complex driving layer, the registers of the general timer module and dead-time module of the microcontroller in the control circuit are configured according to the phase shift angle control quantity to modulate and generate the corresponding PWM driving signal.

[0016] S4. Input the modulated PWM drive signal to the corresponding switch in the phase-shifted full-bridge main circuit to realize phase-shifted control of the phase-shifted full-bridge DC-DC converter.

[0017] As a preferred embodiment, step S3, the specific process of generating the corresponding PWM drive signal by modulation includes:

[0018] S301. Configure the first channel (ATOMi_CHj) of the general-purpose timer module to rising count mode, and output its clear signal to the subsequent channels;

[0019] S302. Configure the second channel (ATOMi_CH(j+n)) of the general-purpose timer module to rising count mode, and select the clear signal of the first channel as its external clear source;

[0020] S303. Enable the dead-time modules corresponding to the first and second channels respectively, and set the dead-time.

[0021] S304. The complementary PWM signals used to drive the first switch (Q1) and the third switch (Q3) in the phase-shifted full-bridge main circuit are mapped to the positive and negative outputs of the dead-time module corresponding to the first channel, respectively; the complementary PWM signals used to drive the second switch (Q2) and the fourth switch (Q4) are mapped to the positive and negative outputs of the dead-time module corresponding to the second channel, respectively.

[0022] S305. Calculate the corresponding count value based on the phase shift angle control quantity and write it into the comparison value shadow register of the second channel to dynamically adjust the phase of the output PWM signal of the second channel.

[0023] As a preferred embodiment, step S301 includes the following specific processing steps:

[0024] S3011. Configure the first channel to rise counting mode;

[0025] S3012. Configure the counting reset method of the first channel as follows: when the count value reaches the value of the first comparison register (CM0), the count is reset to zero;

[0026] S3013. Enable the clear signal output (TRIGOUT) of the first channel to trigger subsequent channels.

[0027] As a preferred embodiment, step S302 specifically includes the following processing steps:

[0028] S3021. Configure the counting mode of the second channel to rising counting mode;

[0029] S3022. Select the count reset signal of the second channel as the external reset signal of the first channel;

[0030] S3023. Configure the count clearing mode as follows: clear the count when receiving an external clearing signal.

[0031] As a preferred embodiment, in step S305, the dynamic adjustment of the phase of the second channel output PWM signal specifically includes:

[0032] S3051. Convert the calculated phase shift angle control quantity into the corresponding count value of the general-purpose timer module within one counting cycle;

[0033] S3052. Assign the count value to the first comparison shadow register of the second channel;

[0034] S3053. The sum of the count value and a fixed value is assigned to the second comparison shadow register of the second channel;

[0035] S3054. Enable the shadow register update function of the general-purpose timer module to load and apply the value of the shadow register after a PWM cycle ends.

[0036] As a preferred embodiment, in step S4, the PWM drive signal satisfies the following timing and logic relationships:

[0037] The gate drive signal (PWM_Q1) controlling the first switch (Q1) and the gate drive signal (PWM_Q3) controlling the third switch (Q3) are complementary signals with dead time, and their duty cycles are constant at 50%.

[0038] The gate drive signal (PWM_Q2) controlling the second switch (Q2) and the gate drive signal (PWM_Q4) controlling the fourth switch (Q4) are complementary signals with dead time, and their duty cycles are constant at 50%.

[0039] The phase of the gate drive signal (PWM_Q1) of the first switch (Q1) leads the phase of the gate drive signal (PWM_Q2) of the second switch (Q2) by an amount equal to the phase shift angle.

[0040] The gate drive signal (PWM_SR1) controlling the first synchronous rectifier (SR1) is the result of a logical AND operation between the gate drive signal (PWM_Q1) of the first switch and the gate drive signal (PWM_Q4) of the fourth switch.

[0041] The gate drive signal (PWM_SR2) controlling the second synchronous rectifier (SR2) is the result of a logical AND operation between the gate drive signal (PWM_Q2) of the second switch and the gate drive signal (PWM_Q3) of the third switch.

[0042] A phase-shifting modulation device for a phase-shifting full-bridge DC-DC converter, applied to a phase-shifting full-bridge DC-DC converter, the phase-shifting modulation device comprising:

[0043] The phase-shift angle calculation module is used to calculate the phase-shift angle control quantity based on the output feedback signal of the phase-shift full-bridge DC-DC converter in the AUTOSAR architecture application layer of the control circuit.

[0044] The data interaction module is used to transmit the phase angle control quantity to the underlying complex drive layer (CDD) through the runtime environment (RTE) of the AUTOSAR architecture.

[0045] The PWM signal modulation module is used in the Complex Drive Layer (CDD) to configure the registers of the general-purpose timer module (ATOM) and dead-time module (DTM) of the microcontroller in the control circuit according to the phase shift angle control quantity, so as to modulate and generate the corresponding PWM drive signal.

[0046] The drive signal output module is used to input the modulated PWM drive signal to the corresponding switching transistor in the phase-shifted full-bridge main circuit.

[0047] A phase-shifting full-bridge DC-DC converter phase-shifting modulation device includes a memory for storing computer programs;

[0048] A processor is used to execute the computer program to implement the steps of the phase-shifting modulation method for a phase-shifting full-bridge DC-DC converter as described above.

[0049] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the phase-shifting modulation method for a phase-shifting full-bridge DC-DC converter as described above.

[0050] Compared with the prior art, the present invention has the following technical effects:

[0051] 1. Traditional automotive DC-DC converter development is based on DSP and does not use automotive AUTOSAR software architecture. It has many shortcomings in terms of software reliability, portability, readability and functional safety. This invention builds the control software of the phase-shifted full-bridge DC-DC converter on the AUTOSAR architecture. Due to the strict layered design of the AUTOSAR architecture (application layer ASW, runtime environment RTE, basic software layer BSW), the application algorithm and the underlying hardware are decoupled, which fundamentally changes the traditional discrete development mode of automotive power supply based on dedicated DSP.

[0052] 2. This invention directly configures the registers of the general-purpose timer module (ATOM) and dead-time module (DTM) in the control circuit within the complex driver layer of AUTOSAR. This bypasses the functional limitations of traditional general-purpose PWM peripherals. By directly manipulating the counting mode, clearing linkage, shadow register, and other underlying resources of the ATOM channel, it can flexibly and efficiently generate multiple complex PWM waveforms with constant duty cycle, adjustable phase, and programmable dead time, ensuring the timing accuracy and real-time performance of the PWM signal. At the same time, by embedding the PWM waveform generation in the underlying driver, high-frequency real-time calculations are avoided at the application layer, improving the determinism and response speed of the system. Attached Figure Description

[0053] To make the objectives, technical solutions, and advantages of the invention clearer, the invention will now be described in further detail with reference to the accompanying drawings, wherein:

[0054] Figure 1 This is a structural diagram of the phase-shifted full-bridge DC-DC converter provided in an embodiment of the present invention;

[0055] Figure 2 This is a flowchart of the phase-shifting modulation method for a phase-shifting full-bridge DC-DC converter provided in an embodiment of the present invention;

[0056] Figure 3 This is a schematic diagram of phase-shift modulation timing provided in an embodiment of the present invention. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but only to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0058] The present invention will now be described in further detail with reference to the accompanying drawings.

[0059] Traditionally, DC-DC converters developed using independent DSP chips and proprietary software architectures can no longer meet the new requirements of vehicle-level standards regarding system cost, space layout, dynamic collaborative control, and software functional safety. This contradiction manifests itself in several ways: resource redundancy and high costs due to discrete hardware; system performance bottlenecks caused by communication delays between control units; and inherent deficiencies in reliability, maintainability, and portability of non-standardized software. In particular, with the deep integration of DC-DC functionality into the main domain controller, the widely adopted AUTOSAR standard software architecture lacks a mature, efficient, and reliable phase-shifted full-bridge PWM modulation implementation scheme, which has become a key technical obstacle to achieving automotive-grade high-performance integrated power supply and drive design.

[0060] Therefore, in view of the above-mentioned problems and shortcomings, this invention proposes a phase-shifted full-bridge DC-DC converter and its phase-shifting modulation method, device and medium. The method implements the core logic of phase-shifting modulation in the complex driving layer of AUTOSAR and configures the registers of the general-purpose timer module (ATOM) and dead-time module (DTM) built into the controller. This realizes the integration of the standardization and safety requirements of automotive electronics with the real-time and accuracy requirements of power electronics, improves the system integration and reduces the overall cost.

[0061] Specifically, Figure 1 The phase-shifted full-bridge DC-DC converter proposed in this embodiment, such as... Figure 1 As shown, it includes a phase-shifted full-bridge main circuit and a control circuit;

[0062] The phase-shifted full-bridge main circuit includes a primary-side full-bridge circuit, a high-frequency transformer T, and a secondary-side rectifier and filter circuit.

[0063] The primary-side full-bridge circuit includes a first switch (Q1), a second switch (Q2), a third switch (Q3), a fourth switch (Q4), and a first clamping diode (D). C1 ), second clamping diode (D) C2 The first switch (Q1), the second switch (Q2), the cathode of the first clamping diode, and the positive terminal of the input filter capacitor are connected together; the third switch (Q3), the fourth switch (Q4), the anode of the second clamping diode, and the negative terminal of the input filter capacitor are connected together; the drain of the first switch (Q1), the source of the third switch (Q3), and the source of the third switch (Q3) are connected to one end of the leakage inductance (Lr), and the other end of the leakage inductance (Lr) is connected to the same-name terminal of the primary winding of the high-frequency transformer (T); the drain of the second switch (Q2), the source of the fourth switch (Q4), and the DC blocking capacitor (C) are connected to one end of the DC blocking capacitor (C), and the other end of the DC blocking capacitor (C) is connected to the opposite-name terminal of the primary winding of the high-frequency transformer (T);

[0064] The secondary-side rectifier and filter circuit includes a first synchronous rectifier (SR1), a second synchronous rectifier (SR2), an output filter inductor (L2), and an output filter capacitor (Co). The secondary side of the high-frequency transformer (T) adopts a double-winding structure with a center tap, wherein the same-name terminal of the first secondary winding is connected to the source of the second synchronous rectifier (SR2), and the opposite-name terminal of the second secondary winding is connected to the source of the first synchronous rectifier (SR1). The drains of the first synchronous rectifier (SR1) and the second synchronous rectifier (SR2) are connected together and then connected to the negative terminal of the output filter capacitor (Co). The center tap is connected to the positive terminal of the output filter capacitor (Co) through the output filter inductor (L2).

[0065] The control circuit is connected to the control terminals of each switching transistor in the phase-shifted full-bridge main circuit.

[0066] In practice, the control function of the phase-shifted full-bridge DC-DC converter is implemented based on the AUTOSAR software architecture; the MCU used is the Infineon TC3xx series chip; it is used for the control of the phase-shifted full-bridge DC-DC converter.

[0067] The software is implemented based on the AUTOSAR architecture, which comprises a four-layer architecture: Application Software Layer (ASW), Runtime Environment (RTE), Basic Software Layer (BSW), and the bottom layer (Microcontroller Abstraction Layer (MCAL) and Complex Driver Layer (CDD)). Data interaction between each layer is achieved through a Virtual Function Bus (VFB). The modulation technology described in this embodiment is primarily implemented in the bottom-layer software.

[0068] In the specific application of this embodiment, the complete model of the MCU (main control chip) used in the control circuit is SAK-TC387QP-160F300S, which is manufactured by Infineon Technologies.

[0069] In the specific application of this embodiment, the synchronous rectifier and the switching transistor can be MOSFETs or IGBTs.

[0070] Figure 2 This is a flowchart of a phase-shifting modulation method for a phase-shifting full-bridge DC-DC converter proposed in this embodiment. This phase-shifting modulation method is applied to a phase-shifting full-bridge DC-DC converter including a phase-shifting full-bridge main circuit and a control circuit, such as... Figure 2 As shown, the phase-shifting modulation method includes:

[0071] S1. In the AUTOSAR architecture application layer of the control circuit, the phase shift angle control quantity is calculated based on the output feedback signal of the phase-shifted full-bridge DC-DC converter.

[0072] S2. The phase shift angle control quantity is transmitted to the underlying complex drive layer (CDD) through the runtime environment (RTE) of the AUTOSAR architecture.

[0073] S3. In the complex drive layer (CDD), the registers of the general-purpose timer module (ATOM) and dead-time module (DTM) of the microcontroller in the control circuit are configured according to the phase shift angle control quantity to modulate and generate the corresponding PWM drive signal.

[0074] S4. Input the modulated PWM drive signal to the corresponding switch in the phase-shifted full-bridge main circuit to realize phase-shifted control of the phase-shifted full-bridge DC-DC converter.

[0075] Figure 3 This embodiment describes the phase-shifting modulation method for the phase-shifting full-bridge DC-DC converter developed based on the AUTOSAR architecture. This phase-shifting modulation method is implemented by configuring relevant registers in the AUTOSAR underlying software CDD.

[0076] The phase-shift modulation method in this embodiment refers to the MUC obtaining the phase shift angle φ according to the feedback control algorithm in the application layer, and the underlying software then modulating the gate-level drive signals (PWM_Q1, PWM_Q2, PWM_Q3, PWM_Q4) controlling the primary-side switching transistors (Q1, Q2, Q3, Q4) and the gate drive signals (PWM_SR1 and PWM_SR2) controlling the secondary-side synchronous rectifier transistors (SR1 and SR2) according to the phase shift φ.

[0077] In practice, the modulation and generation of the corresponding PWM drive signal involves five steps:

[0078] S301. Configure the first channel (ATOMi_CHj, where (i is the ATOM module number and j is the channel number) of the general timer module to the rising count mode, and output its clear signal to the subsequent channels.

[0079] In practice, the process includes:

[0080] S3011. Configure the first channel in TC387 to up counting mode (GTM_ATOMi_CHj_CTRL.B.UDMODE=0x00).

[0081] S3012. Configure the counting reset method of the first channel as follows: when the count value reaches the value of the first comparison register (CM0), it is reset to zero (GTM_ATOMi_CHj_CTRL.B.RST_CCU0=0x0).

[0082] S3013. Enable the clear signal output (TRIGOUT) of the first channel to trigger the subsequent channel (GTM_ATOMi_CHj_CTRL.B.TRIGOUT=0x1).

[0083] S3014. Set the duty cycle to a fixed 50%, and set the output PWM polarity to output a high level when the comparison value CM1 is greater than the count value, otherwise output a low level (GTM_ATOMi_CHj_SOMP.U = 0x01000802).

[0084] S302. Configure the second channel (ATOMi_CH(j+n)) of the general-purpose timer module to rising count mode, and select the clear signal of the first channel as its external clear source;

[0085] In practice, the process includes:

[0086] S3021. Configure the counting mode of the second channel to rising counting mode (GTM_ATOMi_CH(j+n)_CTRL.B.UDMODE=0x00).

[0087] S3022. Select the count clear signal of the second channel as the external clear (TRIGOUT) signal of the first channel (GTM_ATOM2_CH3_CTRL.B.EXT_TRIG=0x0U);

[0088] S3023. Configure the count clearing method as follows: clear the count when receiving an external clearing signal (GTM_ATOMi_CH(j+n)_CTRL.B.RST_CCU0=0x1).

[0089] Set the output PWM polarity to be high when the count value equals the comparison value CM0, and low when the count value equals the comparison value CM1 (GTM_ATOMi_CH(j+n)_SOMP.U = 0x01000802).

[0090] S303. Enable the dead-time modules corresponding to the first and second channels respectively, and set the dead-time.

[0091] S304. The complementary PWM signals used to drive the first switch (Q1) and the third switch (Q3) in the phase-shifted full-bridge main circuit are mapped to the positive and negative outputs of the dead-time module corresponding to the first channel, respectively; the complementary PWM signals used to drive the second switch (Q2) and the fourth switch (Q4) are mapped to the positive and negative outputs of the dead-time module corresponding to the second channel, respectively.

[0092] Specifically, the PWM_Q1 signal pin is mapped to the positive output of the dead-time module corresponding to ATOMi_CHj;

[0093] Map the PWM_Q3 signal pin to the negative output of the dead-time module corresponding to ATOMi_CHj;

[0094] Map the PWM_Q2 signal pin to the positive output of the dead-time module corresponding to ATOMi_CH(j+n);

[0095] Map the PWM_Q4 signal pin to the negative output of the dead-time module corresponding to ATOMi_CH(j+n);

[0096] S305. Calculate the corresponding count value based on the phase shift angle control quantity and write it into the comparison value shadow register of the second channel to dynamically adjust the phase of the output PWM signal of the second channel.

[0097] In practice, the process includes:

[0098] S3051. Convert the calculated phase shift angle control quantity into the corresponding count value of the general-purpose timer module within one counting cycle;

[0099] S3052. Assign the count value to the first comparison shadow register of the second channel;

[0100] S3053. The sum of the count value and a fixed value is assigned to the second comparison shadow register of the second channel;

[0101] S3054. Enable the shadow register update function of the general-purpose timer module to load and apply the value of the shadow register after a PWM cycle ends.

[0102] In specific implementation, the PWM drive signal satisfies the following timing and logic relationships:

[0103] The gate drive signal (PWM_Q1) controlling the first switch (Q1) and the gate drive signal (PWM_Q3) controlling the third switch (Q3) are complementary signals with dead time, and their duty cycles are constant at 50%.

[0104] The gate drive signal (PWM_Q2) controlling the second switch (Q2) and the gate drive signal (PWM_Q4) controlling the fourth switch (Q4) are complementary signals with dead time, and their duty cycles are constant at 50%.

[0105] The phase of the gate drive signal (PWM_Q1) of the first switch (Q1) leads the phase of the gate drive signal (PWM_Q2) of the second switch (Q2) by an amount equal to the phase shift angle.

[0106] The gate drive signal (PWM_SR1) controlling the first synchronous rectifier (SR1) is the result of a logical AND operation between the gate drive signal (PWM_Q1) of the first switch and the gate drive signal (PWM_Q4) of the fourth switch.

[0107] The gate drive signal (PWM_SR2) controlling the second synchronous rectifier (SR2) is the result of a logical AND operation between the gate drive signal (PWM_Q2) of the second switch and the gate drive signal (PWM_Q3) of the third switch.

[0108] The phase-shift modulation method in this embodiment is not limited to phase-shift full-bridge circuits; it is applicable to any phase-shift control developed using an MCU with a Bosch GTMIP core series.

[0109] Accordingly, this application also proposes an embodiment of a phase-shifting modulation device for a phase-shifting full-bridge DC-DC converter, the phase-shifting modulation device comprising: a phase-shifting angle calculation module, used to calculate the phase-shifting angle control amount based on the output feedback signal of the phase-shifting full-bridge DC-DC converter in the AUTOSAR architecture application layer of the control circuit;

[0110] The data interaction module is used to transmit the phase angle control quantity to the underlying complex drive layer (CDD) through the runtime environment (RTE) of the AUTOSAR architecture.

[0111] The PWM signal modulation module is used in the Complex Drive Layer (CDD) to configure the registers of the general-purpose timer module (ATOM) and dead-time module (DTM) of the microcontroller in the control circuit according to the phase shift angle control quantity, so as to modulate and generate the corresponding PWM drive signal.

[0112] The drive signal output module is used to input the modulated PWM drive signal to the corresponding switching transistor in the phase-shifted full-bridge main circuit.

[0113] This application also provides another embodiment of a phase-shifting full-bridge DC-DC converter phase-shifting modulation device, including a memory for storing a computer program;

[0114] A processor is used to implement the steps of the phase-shifting modulation method for a phase-shifting full-bridge DC-DC converter as described above when executing the computer program.

[0115] The phase-shifting full-bridge converter control device provided in this application may include, but is not limited to, smartphones, tablets, laptops, or desktop computers.

[0116] The processor may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor can be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor may also include a main processor and coprocessors. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessors are low-power processors used to process data in the standby state. In some embodiments, the processor may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor may also include an Artificial Intelligence (AI) processor, which handles computational operations related to machine learning.

[0117] The memory may include one or more computer-readable storage media, which may be non-transitory. The memory may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory is used to store at least the following computer program, which, after being loaded and executed by the processor, is capable of implementing the relevant steps of the phase-shifted full-bridge converter control method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory may also include an operating system and data, and the storage method may be temporary or permanent storage. The operating system may include Windows, Unix, Linux, etc.

[0118] In some embodiments, the phase-shifted full-bridge DC-DC converter modulation device may further include a display screen, input / output interfaces, communication interfaces, a power supply, and a communication bus.

[0119] Finally, this application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the phase-shifting modulation method for a phase-shifting full-bridge DC-DC converter as described above.

[0120] It is understood that if the methods in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0121] The phase-shifted full-bridge converter and its control method, apparatus, and medium provided in this application have been described in detail above. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0122] In summary, compared with the prior art, the phase-shifted full-bridge DC-DC converter and its phase-shifting modulation method, device, and medium proposed in this embodiment have the following technical advantages:

[0123] 1. Traditional automotive DC-DC converter development is based on DSP and does not use automotive AUTOSAR software architecture. It has many shortcomings in terms of software reliability, portability, readability and functional safety. This invention builds the control software of the phase-shifted full-bridge DC-DC converter on the AUTOSAR architecture. Due to the strict layered design of the AUTOSAR architecture (application layer ASW, runtime environment RTE, basic software layer BSW), the application algorithm and the underlying hardware are decoupled, which fundamentally changes the traditional discrete development mode of automotive power supply based on dedicated DSP.

[0124] 2. This invention directly configures the registers of the general-purpose timer module (ATOM) and dead-time module (DTM) in the control circuit within the complex driver layer of AUTOSAR. This bypasses the functional limitations of traditional general-purpose PWM peripherals. By directly manipulating the counting mode, clearing linkage, shadow register, and other underlying resources of the ATOM channel, it can flexibly and efficiently generate multiple complex PWM waveforms with constant duty cycle, adjustable phase, and programmable dead time, ensuring the timing accuracy and real-time performance of the PWM signal. At the same time, by embedding the PWM waveform generation in the underlying driver, high-frequency real-time calculations are avoided at the application layer, improving the determinism and response speed of the system.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail can be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A phase-shifted full-bridge DC-DC converter, characterized in that include: Phase-shifted full-bridge main circuit and control circuit; The phase-shifted full-bridge main circuit includes a primary-side full-bridge circuit, a high-frequency transformer, and a secondary-side rectifier and filter circuit. The primary-side full-bridge circuit includes a first switching transistor, a second switching transistor, a third switching transistor, a fourth switching transistor, a first clamping diode, a second clamping diode, and an input filter capacitor. The sources of the first and second switching transistors, the cathode of the first clamping diode, and the positive terminal of the input filter capacitor are all connected together. The drains of the third and fourth switching transistors, the anode of the second clamping diode, and the negative terminal of the input filter capacitor are all connected together. The drain of the first and third switching transistors and the source of the third switching transistor are connected to one end of a leakage inductor, and the other end of the leakage inductor is connected to the same-name terminal of the primary winding of the high-frequency transformer. The drain of the second and fourth switching transistors and the source of the fourth switching transistor are connected to one end of a DC blocking capacitor, and the other end of the DC blocking capacitor is connected to the opposite-name terminal of the primary winding of the high-frequency transformer. The secondary-side rectifier and filter circuit includes a first synchronous rectifier diode, a second synchronous rectifier diode, an output filter inductor, and an output filter capacitor. The secondary side of the high-frequency transformer adopts a double-winding structure with a center tap, wherein the same-name terminal of the first secondary winding is connected to the source of the second synchronous rectifier diode, and the opposite-name terminal of the second secondary winding is connected to the source of the first synchronous rectifier diode. The drains of the first and second synchronous rectifier diodes are connected together and then connected to the negative terminal of the output filter capacitor. The center tap is connected to the positive terminal of the output filter capacitor through the output filter inductor. The control circuit is connected to the control terminals of each switching transistor in the phase-shifted full-bridge main circuit.

2. A phase-shifted full-bridge DC-DC converter phase-shift modulation method, characterized in that, The phase-shifting modulation method, applied to the phase-shifting full-bridge DC-DC converter of claim 1, comprises: S1. In the AUTOSAR architecture application layer of the control circuit, the phase shift angle control quantity is calculated based on the output feedback signal of the phase-shifted full-bridge DC-DC converter. S2. The phase shift angle control quantity is transmitted to the underlying complex driving layer through the runtime environment of the AUTOSAR architecture; S3. In the complex driving layer, the registers of the general timer module and dead-time module of the microcontroller in the control circuit are configured according to the phase shift angle control quantity to modulate and generate the corresponding PWM driving signal. S4. Input the modulated PWM drive signal to the corresponding switch in the phase-shifted full-bridge main circuit to realize phase-shifted control of the phase-shifted full-bridge DC-DC converter.

3. The phase-shifting modulation method for a phase-shifted full-bridge DC-DC converter according to claim 2, characterized in that, In step S3, the specific process of generating the corresponding PWM drive signal through modulation includes: S301. Configure the first channel of the general-purpose timer module to rising count mode, and output its clear signal to the subsequent channels; S302. Configure the second channel of the general-purpose timer module to rising count mode, and select the clear signal of the first channel as its external clear source; S303. Enable the dead-time modules corresponding to the first and second channels respectively, and set the dead-time. S304. The complementary PWM signals used to drive the first and third switching transistors in the phase-shifted full-bridge main circuit are mapped to the positive and negative outputs of the dead-time module corresponding to the first channel, respectively; the complementary PWM signals used to drive the second and fourth switching transistors are mapped to the positive and negative outputs of the dead-time module corresponding to the second channel, respectively. S305. Calculate the corresponding count value based on the phase shift angle control quantity and write it into the comparison value shadow register of the second channel to dynamically adjust the phase of the output PWM signal of the second channel.

4. The phase-shifting modulation method for a phase-shifting full-bridge DC-DC converter according to claim 3, characterized in that, In step S301, the specific processing procedure includes: S3011. Configure the first channel to rise counting mode; S3012. Configure the counting reset method of the first channel as follows: reset to zero when the count value reaches the value of the first comparison register; S3013. Enable the clear signal output of the first channel to trigger subsequent channels.

5. The phase-shifting modulation method for a phase-shifted full-bridge DC-DC converter according to claim 4, characterized in that, In step S302, the specific processing procedure includes: S3021. Configure the counting mode of the second channel to rising counting mode; S3022: Select the count reset signal of the second channel as the external reset signal of the first channel; S3023. Configure the count clearing mode as follows: clear the count when receiving an external clearing signal.

6. The phase-shifting modulation method for a phase-shifted full-bridge DC-DC converter according to claim 3, characterized in that, In step S305, the dynamic adjustment of the phase of the second channel output PWM signal specifically includes: S3051. Convert the calculated phase shift angle control quantity into the corresponding count value of the general-purpose timer module within one counting cycle; S3052. Assign the count value to the first comparison shadow register of the second channel; S3053. The sum of the count value and a fixed value is assigned to the second comparison shadow register of the second channel; S3054. Enable the shadow register update function of the general-purpose timer module to load and apply the value of the shadow register after a PWM cycle ends.

7. The phase-shifting modulation method for a phase-shifted full-bridge DC-DC converter according to claim 2, characterized in that, In step S4, the PWM drive signal satisfies the following timing and logic relationships: The gate drive signal controlling the first switch and the gate drive signal controlling the third switch are complementary signals with dead time, and their duty cycles are constant at 50%. The gate drive signal controlling the second switch and the gate drive signal controlling the fourth switch are complementary signals with dead time, and their duty cycles are constant at 50%. The phase of the gate drive signal of the first switch leads the phase of the gate drive signal of the second switch by an amount equal to the phase shift angle. The gate drive signal controlling the first synchronous rectifier is the result of a logical AND operation between the gate drive signal of the first switch and the gate drive signal of the fourth switch. The gate drive signal controlling the second synchronous rectifier is the result of a logical AND operation between the gate drive signal of the second switch and the gate drive signal of the third switch.

8. A phase-shifting modulation device for a phase-shifting full-bridge DC-DC converter, characterized in that, The phase-shifting modulation device, applied to the phase-shifting full-bridge DC-DC converter of claim 1, comprises: The phase-shift angle calculation module is used to calculate the phase-shift angle control quantity based on the output feedback signal of the phase-shift full-bridge DC-DC converter in the AUTOSAR architecture application layer of the control circuit. The data interaction module is used to transmit the phase angle control quantity to the underlying complex driving layer through the runtime environment of the AUTOSAR architecture. The PWM signal modulation module is used in the complex driving layer to configure the registers of the general timer module and dead-time module of the microcontroller in the control circuit according to the phase shift angle control quantity, so as to modulate and generate the corresponding PWM drive signal. The drive signal output module is used to input the modulated PWM drive signal to the corresponding switching transistor in the phase-shifted full-bridge main circuit.

9. A phase-shifting modulation device for a phase-shifting full-bridge DC-DC converter, characterized in that, Includes memory used to store computer programs; A processor, configured to implement the steps of the phase-shifting modulation method for a phase-shifting full-bridge DC-DC converter as described in any one of claims 2 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the phase-shifting modulation method for a phase-shifting full-bridge DC-DC converter as described in any one of claims 2 to 7.

Images