High frequency ac electrical system for on-board domain controller and its redundant control method

Abstract

The application discloses a high-frequency AC electrical system for a vehicle-mounted domain controller and a redundancy control method thereof, comprising a DC voltage stabilizing module, a high-frequency inverter module, an HFAC bus and a voltage conversion rectifying module, the DC voltage stabilizing module is connected with the high-frequency inverter module to provide a constant DC input voltage for the high-frequency inverter module, the high-frequency inverter module is connected with the voltage conversion rectifying module through the HFAC bus, the HFAC bus has multiple output ports and can simultaneously transmit electric energy to multiple high-frequency step-down transformers of the voltage conversion rectifying module, the high-frequency step-down transformer reduces the high-frequency AC voltage amplitude from the HFAC bus and increases the high-frequency AC voltage amplitude, and the high-frequency step-down transformer rectifies the low-voltage high-current high-frequency AC voltage into low-voltage high-current DC voltage through a VRM rectifying circuit to supply power for the domain controller. The application can realize low-voltage high-current output and has the advantages of simple and reliable structure, rapid dynamic response, small loss, small size, low cost, high power density and the like.

Description

Technical Field

[0001] This invention relates to the technical field of domain controller power supply systems, and in particular to a high-frequency AC electrical system for vehicle-mounted domain controllers and its redundancy control method. Background Technology

[0002] With the rapid development of autonomous driving technology, the computing power requirements of domain controllers in intelligent vehicles are becoming increasingly demanding. Currently, the operating voltage of automotive domain controllers is 0.7V-3.3V, the operating current is generally 250A, and the dynamic current can reach 750A / μs. Their power supply systems generally adopt a multi-phase Buck circuit in parallel to meet the requirements of low voltage and high current. Due to the use of a multi-phase Buck circuit in parallel structure, the size and cost of automotive domain controllers are increased. Moreover, the switching devices in the Buck circuit are in hard-switching conduction mode, resulting in excessive switching losses under low voltage and high current conditions. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and to propose a high-frequency AC electrical system and its redundant control method for vehicle-mounted domain controllers. It can achieve low-voltage high-current output and has the advantages of simple and reliable structure, rapid dynamic response, low loss, small size, low cost and high power density.

[0004] To achieve the above objectives, the technical solution provided by this invention is: a high-frequency AC electrical system for an on-board domain controller, comprising:

[0005] A DC voltage regulator module is used to provide DC voltage for the entire system.

[0006] High-frequency inverter module is used to invert and filter direct current to generate high-frequency alternating current;

[0007] The HFAC bus is used to transmit high-frequency AC power from the high-frequency inverter module to the transformer rectifier module.

[0008] The transformer-rectifier module is used to convert high voltage and low current to low voltage and high current, and to rectify high frequency AC power into constant low voltage and high current DC power to power the domain controller.

[0009] The DC voltage regulator module is connected to the high-frequency inverter module, providing a constant DC input voltage to the high-frequency inverter module. The high-frequency inverter module is connected to the transformer rectifier module via an HFAC bus. The HFAC bus has multiple output ports and can simultaneously transmit power to multiple high-frequency step-down transformers of the transformer rectifier module. The high-frequency step-down transformers reduce the amplitude of the high-frequency AC voltage from the HFAC bus and increase the amplitude of the high-frequency AC current. The high-frequency step-down transformers rectify the low-voltage, high-current high-frequency AC power into low-voltage, high-current DC power through a VRM rectifier circuit to power the domain controller.

[0010] Furthermore, the DC voltage regulator module includes a battery and a DC / DC converter. The output terminal of the battery is connected to the input terminal of the DC / DC converter, and the output voltage of the battery is regulated and controlled by the DC / DC converter.

[0011] Furthermore, the high-frequency inverter module includes a first high-frequency inverter (DC / HFAC) serving as the primary high-frequency inverter, a second high-frequency inverter (DC / HFAC) serving as the backup high-frequency inverter, a first contactor, a second contactor, and a resonant network. The input terminals of the first high-frequency inverter (DC / HFAC) and the second high-frequency inverter (DC / HFAC) are connected to the output terminals of the DC / DC converter. The output terminal of the first high-frequency inverter (DC / HFAC) is connected to the input terminal of the resonant network through the first contactor, and the output terminal of the second high-frequency inverter (DC / HFAC) is connected to the input terminal of the resonant network through the second contactor.

[0012] Furthermore, the HFAC bus is connected to the output terminal of the resonant network and the input terminal of the transformer rectifier module, respectively.

[0013] Furthermore, the transformer rectifier module includes a high-frequency step-down transformer and a VRM rectifier circuit. The primary side of the high-frequency step-down transformer is connected to the HFAC bus, the secondary side of the high-frequency step-down transformer is connected to the input terminal of the VRM rectifier circuit, and the output terminal of the VRM rectifier circuit is connected to the input terminal of the domain controller, which can provide different levels of low voltage and high current to the SOC, DDR and LiDAR in the domain controller.

[0014] This invention also provides the above-mentioned redundancy control method for high-frequency AC electrical systems used in vehicle-mounted domain controllers, as detailed below:

[0015] The first high-frequency inverter (DC / HFAC) and the second high-frequency inverter (DC / HFAC) of the high-frequency inverter module are simultaneously powered by the DC voltage regulator module. When the first high-frequency inverter (DC / HFAC) is operating normally, the first contactor is closed and the second contactor is open. At this time, only the first high-frequency inverter (DC / HFAC), which serves as the primary high-frequency inverter, is in use in the high-frequency inverter module. When the first high-frequency inverter (DC / HFAC) malfunctions, the first contactor is open and the second contactor is closed. At this time, the second high-frequency inverter (DC / HFAC), which serves as the backup high-frequency inverter, is in use in the high-frequency inverter module. When the first high-frequency inverter (DC / HFAC) resumes normal operation, the first contactor is closed and the second contactor is open. At this time, the high-frequency inverter module switches back to the state where only the first high-frequency inverter (DC / HFAC), which serves as the primary high-frequency inverter, is in use.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. The power supply system structure of the vehicle domain controller has been simplified. An isolated high-frequency inverter has been adopted to achieve low-voltage and high-current conversion, which reduces the size, lowers the cost, and increases the power density.

[0018] 2. The backup high-frequency inverter ensures the power supply capability of the HFAC bus, enhancing the stability and fault tolerance of the system power supply.

[0019] 3. The resonant network provides soft-switching conditions for the first high-frequency inverter (DC / HFAC) and the second high-frequency inverter (DC / HFAC), reducing the switching losses generated during the operation of the first high-frequency inverter (DC / HFAC) and the second high-frequency inverter (DC / HFAC).

[0020] 4. The HFAC bus provides high-frequency AC power to the vehicle domain controller, improving the dynamic response performance of the system power supply.

[0021] 5. The transformer and rectifier module provides different levels of low voltage and high current to the SOC, DDR and LiDAR in the vehicle domain controller, improving the reliability and adaptability of the system power supply.

[0022] In summary, the high-frequency AC electrical system of the present invention can achieve low-voltage, high-current output and has the advantages of simple and reliable structure, rapid dynamic response, low loss, small size, low cost, and high power density, making it worthy of promotion. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the high-frequency AC electrical system of the present invention. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0025] like Figure 1 As shown, this embodiment discloses a high-frequency AC electrical system for an in-vehicle domain controller, including three modules and an HFAC bus 10. The three modules are a DC voltage regulator module 3, a high-frequency inverter module 9, and a transformer rectifier module 14. The DC voltage regulator module 3 is connected to the high-frequency inverter module 9, providing a constant DC input voltage to the high-frequency inverter module 9. The high-frequency inverter module 9 is connected to the transformer rectifier module 14 via the HFAC bus 10. The HFAC bus 10 has multiple output ports, which can simultaneously transmit electrical energy to multiple high-frequency step-down transformers 11 of the transformer rectifier module 14. The high-frequency step-down transformers 11 reduce the amplitude of the high-frequency AC voltage from the HFAC bus 10 and increase the amplitude of the high-frequency AC current. The high-frequency step-down transformers 11 rectify the low-voltage, high-current high-frequency AC power into low-voltage, high-current DC power through a VRM rectifier circuit 12, which can provide different levels of low-voltage, high-current power to the SOC, DDR, and LiDAR in the domain controller 13.

[0026] Specifically, the DC voltage regulator module 3 includes a battery 1 and a DC / DC converter 2. The output terminal of the battery 1 is connected to the input terminal of the DC / DC converter 2 to provide DC voltage for the entire system. The output terminal of the DC / DC converter 2 is connected to the input terminal of the high-frequency inverter module 9 to regulate the output voltage of the battery 1 and provide a constant DC voltage for the high-frequency inverter module 9.

[0027] Specifically, the high-frequency inverter module 9 includes a first high-frequency inverter (DC / HFAC) 4, a second high-frequency inverter (DC / HFAC) 5, a first contactor 6, a second contactor 7, and a resonant network 8. The input terminals of the first high-frequency inverter (DC / HFAC) 4 and the second high-frequency inverter (DC / HFAC) 5 are connected to the output terminals of the DC / DC converter 2. The output terminal of the first high-frequency inverter (DC / HFAC) 4 is connected to the input terminal of the resonant network 8 through the first contactor 6. The output of inverter 5 is connected to the input of resonant network 8 via the second contactor 7, which inverts and filters DC power to generate high-frequency AC power. The first high-frequency inverter (DC / HFAC) 4 is used as the main high-frequency inverter. The second high-frequency inverter (DC / HFAC) 5 is used as a backup high-frequency inverter to ensure the power supply capability of HFAC bus 10 and enhance the stability and fault tolerance of the system power supply. The HFAC bus 10 connects the output of resonant network 8 to the input of transformer rectifier module 14 to transmit high-frequency AC power to transformer rectifier module 14.

[0028] The first high-frequency inverter (DC / HFAC) 4 and the second high-frequency inverter (DC / HFAC) 5 are simultaneously powered by the DC voltage regulator module 3. However, only the first contactor 6 of the primary high-frequency inverter circuit is closed and put into use, while the second contactor 7 of the standby high-frequency inverter circuit is open and on standby. When the primary high-frequency inverter fails and loses power, the first contactor 6 opens, the second contactor 7 closes, and the standby high-frequency inverter circuit is powered. During the standby high-frequency inverter power supply process, if the primary high-frequency inverter recovers, the first contactor 6 closes, the second contactor 7 opens, and the primary high-frequency inverter circuit continues to supply power. This control method achieves power supply redundancy for the primary and standby high-frequency inverters.

[0029] Specifically, the transformer and rectifier module 14 includes a high-frequency step-down transformer 11 and a VRM rectifier circuit 12. The primary side of the high-frequency step-down transformer 11 is connected to the HFAC bus 10, the secondary side of the high-frequency step-down transformer 11 is connected to the input terminal of the VRM rectifier circuit 12, and the output terminal of the VRM rectifier circuit 12 is connected to the input terminal of the domain controller 13, which can provide different levels of low voltage and high current for the SOC, DDR and LiDAR in the domain controller.

[0030] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A high-frequency AC electrical system for an on-board domain controller, characterized in that, include: A DC voltage regulator module is used to provide DC voltage for the entire system. High-frequency inverter module is used to invert and filter direct current to generate high-frequency alternating current; The HFAC bus is used to transmit high-frequency AC power from the high-frequency inverter module to the transformer rectifier module. The transformer-rectifier module is used to convert high voltage and low current to low voltage and high current, and to rectify high frequency AC power into constant low voltage and high current DC power to power the domain controller. The DC voltage regulator module is connected to the high-frequency inverter module, providing a constant DC input voltage to the high-frequency inverter module. The high-frequency inverter module is connected to the transformer rectifier module via the HFAC bus. The HFAC bus has multiple output ports and can simultaneously transmit power to multiple high-frequency step-down transformers of the transformer rectifier module. The high-frequency step-down transformer reduces the amplitude of the high-frequency AC voltage from the HFAC bus and increases the amplitude of the high-frequency AC current. The high-frequency step-down transformer rectifies the low-voltage, high-current high-frequency AC power into low-voltage, high-current DC power through the VRM rectifier circuit to power the domain controller. The high-frequency inverter module includes a first high-frequency inverter as the main high-frequency inverter, a second high-frequency inverter as the backup high-frequency inverter, a first contactor, a second contactor, and a resonant network. The input terminals of the first high-frequency inverter and the second high-frequency inverter are connected to the output terminals of the DC / DC converter. The output terminal of the first high-frequency inverter is connected to the input terminal of the resonant network through the first contactor, and the output terminal of the second high-frequency inverter is connected to the input terminal of the resonant network through the second contactor. The transformer and rectifier module includes a high-frequency step-down transformer and a VRM rectifier circuit. The primary side of the high-frequency step-down transformer is connected to the HFAC bus, and the secondary side of the high-frequency step-down transformer is connected to the input terminal of the VRM rectifier circuit. The output terminal of the VRM rectifier circuit is connected to the input terminal of the domain controller, which can provide different levels of low voltage and high current to the SOC, DDR and LiDAR in the domain controller.

2. The high-frequency AC electrical system for an on-board domain controller according to claim 1, characterized in that, The DC voltage regulator module includes a battery and a DC / DC converter. The output terminal of the battery is connected to the input terminal of the DC / DC converter, and the output voltage of the battery is regulated and controlled by the DC / DC converter.

3. The high-frequency AC electrical system for an on-board domain controller according to claim 2, characterized in that, The HFAC bus is connected to the output of the resonant network and the input of the transformer rectifier module.

4. The redundancy control method for a high-frequency AC electrical system for an on-board domain controller according to any one of claims 1-3, characterized in that, The first and second high-frequency inverters of the high-frequency inverter module are simultaneously powered by the DC voltage regulator module. When the first high-frequency inverter is operating normally, the first contactor is closed and the second contactor is open. At this time, only the first high-frequency inverter, which serves as the primary high-frequency inverter, is in use in the high-frequency inverter module. When the first high-frequency inverter malfunctions, the first contactor is open and the second contactor is closed. At this time, the second high-frequency inverter, which serves as the backup high-frequency inverter, is in use in the high-frequency inverter module. When the first high-frequency inverter resumes normal operation, the first contactor is closed and the second contactor is open. At this time, the high-frequency inverter module switches back to the state where only the first high-frequency inverter, which serves as the primary high-frequency inverter, is in use.

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