Single-source input driving circuit, vehicle-mounted oxygen generator and new energy vehicle

Abstract

The application relates to a single-source input driving circuit, a vehicle-mounted oxygen generator and a new energy vehicle, comprising a power input module, a driving module and a control power module; the power input module is used for processing the accessed vehicle-mounted power to output a stable DC bus voltage; the output end of the driving module is connected with a compressor of the vehicle-mounted oxygen generator and is used for transforming the DC bus voltage output by the power input module to drive the compressor; the output end of the control power module is connected with a control circuit of the vehicle-mounted oxygen generator and is used for generating different grades of voltage from the DC bus voltage to supply power to the control circuit. According to the application, two input ports of double-source input are optimized to one in structure, the input vehicle-mounted power is divided into two paths, and the compressor and the control circuit of the vehicle-mounted oxygen generator are supplied with power, so that the driving circuit design is simplified, the assembly efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a single-source input drive circuit, an on-board oxygen generator, and a new energy vehicle. Background Technology

[0002] Vehicle electrical appliances typically require both a power source to power the drive circuitry and an auxiliary power source to power the control circuitry. Current dual-input architectures necessitate designing two complete interface circuits for the two independent input ports, including connectors, wiring harnesses, fuses, and filtering components. For vehicle electrical appliances like oxygen concentrators, this design further complicates the drive circuitry, increasing costs and impacting assembly efficiency.

[0003] There is currently no effective solution to the problem that dual-source inputs in related technologies make the drive circuit more complex. Utility Model Content

[0004] Therefore, it is necessary to address the aforementioned technical problems by providing a single-source input drive circuit, an on-board oxygen generator, and a new energy vehicle that can simplify the design of the drive circuit.

[0005] Firstly, this embodiment provides a single-source input drive circuit for use in a vehicle-mounted oxygen concentrator; the single-source input drive circuit includes: a power input module, a drive module, and a control power module; the input terminal of the power input module is connected to the vehicle power supply, and the output terminal of the power input module is connected to the input terminal of the drive module and the input terminal of the control power module, respectively;

[0006] The power input module is used to process the connected vehicle power supply to output a stable DC bus voltage.

[0007] The output terminal of the drive module is connected to the compressor of the vehicle-mounted oxygen generator and is used to transform the DC bus voltage output by the power input module to drive the compressor.

[0008] The output terminal of the control power module is connected to the control circuit of the vehicle-mounted oxygen generator, and is used to generate different levels of voltage from the DC bus voltage to power the control circuit.

[0009] In some embodiments, the power input module includes a first filter circuit and a bus capacitor connected in parallel between the positive and negative terminals of the DC bus.

[0010] In some embodiments, the power input module further includes a pre-charging circuit;

[0011] The pre-charging circuit includes a resistor and a reverse polarity protection diode connected in series, and a switching transistor connected in parallel with the resistor and the reverse polarity protection diode.

[0012] In some embodiments, the drive module is a three-phase drive circuit;

[0013] The three-phase drive circuit includes a three-phase bridge arm composed of 6 sets of switching transistors. One end of the upper bridge arm is connected to the positive terminal of the DC bus, and one end of the lower bridge arm is grounded.

[0014] In some embodiments, the control power module includes a multi-stage buck module;

[0015] The multi-stage step-down module is connected to the DC bus and is used to step down the DC bus voltage to obtain the first voltage, the second voltage, and the third voltage of the power rail.

[0016] In some of these embodiments,

[0017] The multi-stage buck module includes a first buck chip, a second buck chip, and a third buck chip;

[0018] The input terminal of the first step-down chip is connected to the DC bus, and is used to step down the DC bus voltage to generate a first voltage;

[0019] The second step-down chip is used to step down the first voltage to generate a second voltage;

[0020] The third step-down chip is used to step down the second voltage to generate a third voltage.

[0021] In some embodiments, the control power supply module further includes a second filter module; the input terminal of the second filter module is connected to the DC bus, and the output terminal of the second filter module is connected to the multi-stage step-down module.

[0022] In some embodiments, the second filtering module includes a common-mode inductor with a capacitor connected to each side of the common-mode inductor.

[0023] Secondly, this embodiment provides a vehicle-mounted oxygen generator, including a compressor, a controller, a sensor, a communication module, and a single-source input drive circuit as described in the first aspect.

[0024] Thirdly, this embodiment provides a new energy vehicle, including an on-board power supply and the on-board oxygen generator described in the second aspect.

[0025] Compared with related technologies, the single-source input drive circuit, vehicle-mounted oxygen generator, and new energy vehicle provided in this embodiment include a power input module, a drive module, and a control power module. The input terminal of the power input module is connected to the vehicle power supply, and the output terminal of the power input module is connected to the input terminal of the drive module and the input terminal of the control power module, respectively. The power input module processes the connected vehicle power supply to output a stable DC bus voltage. The output terminal of the drive module is connected to the compressor of the vehicle-mounted oxygen generator and is used to transform the DC bus voltage output by the power input module to drive the compressor. The output terminal of the control power module is connected to the control circuit of the vehicle-mounted oxygen generator and is used to generate different levels of voltage from the DC bus voltage to power the control circuit. Through this embodiment, the single-source input drive circuit is designed to optimize the two input ports of the dual-source input into one, and the input vehicle power supply is divided into two paths to power the compressor and control circuit of the vehicle-mounted oxygen generator, respectively. This simplifies the drive circuit design, reduces costs, and improves assembly efficiency.

[0026] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0028] Figure 1 This is a hardware block diagram of a single-source input drive circuit in one embodiment;

[0029] Figure 2 This is a simplified circuit diagram of the power input module in one embodiment;

[0030] Figure 3 This is a complete circuit diagram of the power input module in one embodiment;

[0031] Figure 4 This is a simplified circuit diagram of the driver module in one embodiment;

[0032] Figure 5 This is a complete circuit diagram of the driver module in one embodiment;

[0033] Figure 6 This is a simplified circuit diagram of the control power module in one embodiment;

[0034] Figure 7 This is a complete circuit diagram of the control power module in one embodiment. Detailed Implementation

[0035] To better understand the purpose, technical solution, and advantages of this application, the application is described and explained below in conjunction with the accompanying drawings and embodiments.

[0036] Unless otherwise defined, the technical or scientific terms used in this application shall have the general meaning understood by one of ordinary skill in the art to which this application pertains. Words such as “a,” “an,” “an,” “the,” “the,” and “these” used in this application do not indicate quantitative limitation and may be singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or modules (units) is not limited to the listed steps or modules (units) but may include steps or modules (units) not listed, or may include other steps or modules (units) inherent to these processes, methods, products, or devices. Words such as “connected,” “linked,” and “coupled” used in this application are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. Normally, the character " / " indicates that the objects before and after it are in an "or" relationship. The terms "first," "second," "third," etc., used in this application are merely to distinguish similar objects and do not represent a specific order of objects.

[0037] Figure 1 This is a hardware block diagram of the single-source input drive circuit in this embodiment, as shown below. Figure 1 As shown, the single-source input drive circuit includes: a power input module, a drive module, and a control power module; the input terminal of the power input module is connected to the vehicle power supply, and the output terminal of the power input module is connected to the input terminal of the drive module and the input terminal of the control power module, respectively.

[0038] The power input module is used to process the connected vehicle power supply to output a stable DC bus voltage;

[0039] The output of the drive module is connected to the compressor of the vehicle-mounted oxygen generator to convert the DC bus voltage output by the power input module in order to drive the compressor.

[0040] The output of the control power module is connected to the control circuit of the vehicle-mounted oxygen generator, and is used to generate different levels of voltage from the DC bus voltage to power the control circuit.

[0041] Specifically, the power input module connects to the vehicle's power supply and processes the power supply. This processing may include electromagnetic interference filtering, DC-DC conversion, reverse connection protection, and surge suppression during power-on via a pre-charging circuit, providing a stable DC bus voltage for subsequent power circuits. For example, this embodiment uses a single-source 12V vehicle DC power supply.

[0042] The output of the power input module is connected to the input of the drive module and the input of the control power module, respectively. The vehicle power supply is divided into two paths after passing through the control power module and the drive module. The control power module draws power from the vehicle power supply and generates different voltage levels required by the vehicle oxygen concentrator control circuit by multi-stage step-down of the DC bus voltage, thus powering the microcontroller, drive chip, etc. in the control circuit. The drive module transforms the DC bus voltage provided by the voltage input module to drive the compressor of the vehicle oxygen concentrator. Specifically, it can control the motor speed and adjust the oxygen production efficiency of the vehicle oxygen concentrator (such as oxygen flow rate, pressure, etc.).

[0043] In the design of a single-source vehicle power supply, the power input module provides a stable DC bus voltage for the vehicle oxygen concentrator, the drive module drives the compressor, and the oxygen production function of the vehicle oxygen concentrator is realized through precise control of the compressor. The control power module provides multi-level voltages for the control circuit of the vehicle oxygen concentrator. For example, it can be divided into three levels of power rail voltage. The high voltage mainly supplies power to components in the control circuit that require high voltage drive or high power. The medium voltage is an industrial-grade analog / peripheral voltage, which mainly supplies power to medium-power peripherals such as sensors and communication interfaces in the control circuit. The low voltage is a digital core voltage, which mainly supplies power to digital chips in the control circuit, thereby realizing the intelligent control of the vehicle oxygen concentrator.

[0044] By designing a single-source input drive circuit in this embodiment, compared with the existing dual-source input architecture, the two input ports of the dual-source input are first optimized into one in terms of structure, and the input vehicle power supply is divided into two paths, which supply power to the compressor and control circuit of the vehicle oxygen generator respectively, ensuring the normal operation of the vehicle oxygen generator. This simplifies the drive circuit design, reduces costs and improves assembly efficiency.

[0045] In some of these embodiments, Figure 2 This is a simplified circuit diagram of the power input module in this embodiment, as shown below. Figure 2 As shown, the power input module includes a first filter circuit and a bus capacitor connected in parallel between the positive and negative terminals of the DC bus; the power input module also includes a pre-charge circuit; the pre-charge circuit includes a resistor and a reverse polarity protection diode connected in series, and a switching transistor connected in parallel with the resistor and the reverse polarity protection diode.

[0046] Specifically, the first filter circuit can employ EMI (Electromagnetic Interference) filtering, with the common-mode inductor L7 being the core component responsible for suppressing interference. After the DC+ / DC- is connected to the vehicle's 12V DC power supply, the common-mode inductor L7 in the subsequent first filter circuit is used to suppress common-mode electromagnetic interference. In this way, given the electromagnetic noise easily generated by various electrical appliances in the vehicle environment, the common-mode inductor can filter out the "common-mode noise" on the power line. At the same time, it can also reduce the electromagnetic radiation emitted by this circuit, ensuring stable operation of the circuit in a strong interference environment.

[0047] The pre-charging circuit includes a resistor RT1 and a reverse polarity protection diode D24 connected in series, and a switching transistor D25 connected in parallel with the resistor RT1 and the reverse polarity protection diode D24. At the moment of power-on, the switching transistor D25 is turned off, and power is supplied through the resistor RT1 to prevent large current surges. At the same time, the presence of the reverse polarity protection diode D24 can prevent reverse connection. After the voltage at the cathode position of the reverse polarity protection diode D24 reaches a specific value, the switching transistor is turned on, the resistor RT1 and the switching transistor D25 are short-circuited, and power is supplied directly through the switching transistor to enable the circuit to work normally.

[0048] A bus filter capacitor is connected in parallel between the positive terminal VinBus+ and the negative terminal VinBus- of the DC bus. Multiple bus filter capacitors can be connected in parallel to smooth the DC bus voltage, store electrical energy to cope with sudden load changes in the drive module (such as the large current when the compressor motor starts), reduce voltage fluctuations, and ensure stable power supply to the power circuit.

[0049] Power ground (PCND) provides an independent reference ground for power devices (such as MOSFETs and bus filter capacitors), and is separated from the signal ground (GND) of the control power module to avoid the large current of the power circuit from interfering with the accuracy of the control signal.

[0050] Figure 3 This is a complete circuit diagram of the power input module in this embodiment, as shown below. Figure 3 As shown, with Figure 2 Correspondingly, this includes the first filter circuit (common-mode inductor L7), the pre-charge circuit (resistor RT1 and switching transistors D25 and D47), the reverse polarity protection diode (D24), and the bus filter capacitors (EC2~EC7 in parallel). For details on the auxiliary components and their interconnections, please refer to [link to relevant documentation]. Figure 3 .

[0051] It should be noted that, Figure 3 In practice, the switching function is achieved by two switching transistors, D25 and D47. The switching transistors can divide the voltage and improve the withstand voltage. In actual engineering applications, when using two switching transistors, the transistors with lower withstand voltage ratings can be used, which is cheaper than using a single transistor with a higher withstand voltage rating.

[0052] In this embodiment, the power input module performs electromagnetic interference filtering and reverse connection protection on the vehicle DC power supply, and suppresses power-on surges through the pre-charging circuit, thus providing a stable DC bus voltage for subsequent power circuits.

[0053] In some of these embodiments, Figure 4 This is a simplified circuit diagram of the driver module in this embodiment, as shown below. Figure 4 As shown, the drive module is a three-phase drive circuit, which includes a three-phase bridge arm composed of 6 sets of switching transistors. One end of the upper bridge arm is connected to the positive terminal of the DC bus, and one end of the lower bridge arm is grounded.

[0054] Specifically, the topology of the drive module adopts a three-phase full-bridge inverter circuit, which consists of six MOSFETs (field-effect transistors) forming the upper bridge arm (UN, VN, WN) and the lower bridge arm (UP, VP, WP). Specifically, by controlling the on and off combinations of the MOSFETs, the three-phase AC voltages U, V, and W are output to drive the compressor.

[0055] The drive control logic is as follows: the gate drive signals of the upper bridge arm MOSFETs UN / VN / WN and UP / VP / WP (gate drive signals of the lower bridge arm MOSFETs) are driven by PWM (Pulse Width Modulation) signals output by the control circuit of the on-board oxygen concentrator (such as a microcontroller MCU and a gate drive chip). By strictly controlling the on / off timing of the six MOSFETs, the DC bus voltage between VinBus+ and PGND in the power input module can be connected, and a three-phase sinusoidal AC current (or an approximate sine wave modulated by PWM) is generated at the output terminals (U, V, W).

[0056] The output three-phase AC voltages U, V, and W are connected to the three-phase compressor motor windings of the vehicle-mounted oxygen concentrator. The motor speed is positively correlated with the frequency of the PWM signal, and the output torque is positively correlated with the duty cycle of the PWM. Therefore, by adjusting the frequency and duty cycle of the PWM, the motor speed and torque can be precisely controlled, thereby adjusting the compressor's discharge volume and pressure, ultimately achieving control over the efficiency of the oxygen production process (such as oxygen production rate and oxygen purity).

[0057] Figure 5 This is a complete circuit diagram of the driver module in this embodiment, as shown below. Figure 5 As shown, with Figure 4 Accordingly, this includes 6 groups of switching transistors. Each group of switching transistors includes two field-effect transistors (FETs) and auxiliary devices. Specifically, FETs D27 and D28 form one group, D29 and D30 form another, D31 and D32 form another, D33 and D34 form another, D35 and D36 form another, and D37 and D38 form yet another. For the remaining auxiliary devices and their interconnections, please refer to [link / reference]. Figure 5 .

[0058] The drive module in this embodiment can convert the DC bus voltage provided by the power input module into three-phase AC power to drive the three-phase compressor of the vehicle oxygen generator. At the same time, by controlling the motor speed, the oxygen production efficiency (such as oxygen flow rate, pressure, etc.) of the vehicle oxygen generator can be adjusted.

[0059] In some of these embodiments, Figure 6 This is a simplified circuit diagram of the control power module in this embodiment, as shown below. Figure 6 As shown, the control power supply module includes a second filter module and a multi-stage step-down module; the input terminal of the second filter module is connected to the DC bus, and the output terminal of the second filter module is connected to the multi-stage step-down module; through the multi-stage step-down module, the DC bus voltage is stepped down to obtain the first voltage, the second voltage, and the third voltage of the power rail.

[0060] Specifically, the second filtering module includes a common-mode inductor, with capacitors C1 and C2 connected to its two sides. This second filtering module can employ EMI filtering, specifically the common-mode inductor L8. The DC bus voltage between the positive terminal VinBus+ and PGND (power ground) passes through the common-mode inductor L8, filtering common-mode electromagnetic noise and isolating interference signals from the power side, ensuring the purity of the input voltage to the subsequent buck converter chip. The capacitors before and after the common-mode inductor (including differential-mode capacitors) further filter out differential-mode noise, making the voltage waveform more stable and providing a high-quality input power supply to the buck converter chip.

[0061] Signal ground (GND) serves as the reference ground for the control circuit and is electrically isolated from power ground (PCND) to prevent large current fluctuations in the power circuit from interfering with the control signal and to ensure the accuracy of control commands.

[0062] The multi-stage buck module includes a first buck chip, a second buck chip, and a third buck chip. The input of the first buck chip is connected to the DC bus via a second filter module to step down the DC bus voltage to generate a first voltage (e.g., 12V) for the power rail. A synchronous buck converter U1 (e.g., TPS52872) is used to convert the filtered voltage (or directly draw power from the vehicle battery voltage Vbat and filter it through a common-mode inductor) into a stable VDD12 (12V) to power the high-voltage side drive circuit (e.g., MOSFET gate drive) or some chips that do not require high voltage accuracy.

[0063] The second step-down chip is used to step down the first voltage (e.g., 12V) to generate the second voltage (e.g., 5V); among them, a synchronous step-down chip U2 (e.g., TPS560430) is used to further step down VDD12 to VDD5 (5V) to meet the power supply requirements of analog chips, interface circuits (e.g., sensors, communication interfaces), etc. (5V is a common operating voltage for industrial-grade chips).

[0064] The third step-down chip is used to step down the second voltage (e.g., 5V) to generate a third voltage (e.g., 3.3V); a linear regulator (LDO) U3 (e.g., NCV1117) is used to step down VDD5 to VDD3V3 (3.3V). Because the LDO has extremely low output noise, it can provide a clean 3.3V power supply for the core of digital circuits such as MCUs and logic chips (3.3V is the most commonly used operating voltage for modern digital chips).

[0065] Figure 7 This is a simplified circuit diagram of the control power module in this embodiment, and... Figure 6 Correspondingly, such as Figure 7 As shown, this includes a three-stage buck converter chip that outputs 12V, 5V, and 3.3V power rail voltages respectively. For other auxiliary components and their interconnections, please refer to [link / reference needed]. Figure 7 .

[0066] The control power module in this embodiment draws power from the vehicle's DC power supply. Through common-mode inductor filtering and multi-stage step-down design, it generates stable DC power supplies of different levels required by the control circuit, such as 12V, 5V, and 3.3V, providing clean power to the MCU, driver chip, etc. At the same time, the common-mode inductor isolates power-side interference and improves the reliability of the control circuit.

[0067] The present embodiment will now be described and illustrated through preferred embodiments.

[0068] This embodiment provides a single-source input drive circuit for a vehicle-mounted oxygen concentrator, including: a power input module, a drive module, and a control power module; the input terminal of the power input module is connected to the vehicle power supply, and the output terminal of the power input module is connected to the input terminal of the drive module and the input terminal of the control power module, respectively.

[0069] The power input module includes a first filter circuit, a pre-charge circuit, and a bus capacitor connected in parallel between the positive and negative terminals of the DC bus. The pre-charge circuit includes a resistor and a reverse connection protection diode connected in series, as well as a switching transistor connected in parallel with the resistor and the reverse connection protection diode. After the on-board 12V DC power supply is connected to DC+ / DC-, the common-mode inductor in the first filter circuit suppresses common-mode electromagnetic interference and also provides reverse connection protection. The pre-charge circuit suppresses surges during power-on, and the bus capacitor smooths the DC bus voltage, providing a stable DC bus voltage for subsequent power circuits.

[0070] The drive module is a three-phase drive circuit, which inverts the DC bus voltage to output a three-phase AC voltage. The three-phase AC voltages U, V, and W are connected to the three-phase compressor motor windings of the on-board oxygen concentrator to power the compressor. The three-phase drive circuit includes six field-effect transistors (FETs), which form the upper and lower bridge arms. The drain of the FET in the upper bridge arm is connected to the positive terminal of the DC bus, while the source of the FET in the lower bridge arm is grounded.

[0071] The control power supply module includes a second filter module and a multi-stage step-down module. The input of the second filter module is connected to the DC bus, and the output is connected to the multi-stage step-down module. The second filter module receives the DC bus voltage between the positive terminal VinBus+ and PGND (power ground) of the DC bus and filters common-mode electromagnetic noise through a common-mode inductor. The multi-stage step-down module reduces the DC bus voltage to obtain the first voltage, the second voltage, and the third voltage, which power the control circuit of the on-board oxygen generator.

[0072] This embodiment provides a vehicle-mounted oxygen generator, including: a compressor, a controller, a sensor, a communication module, and a single-source input drive circuit as described in any of the above embodiments.

[0073] The core of a vehicle-mounted oxygen concentrator is to compress air with a compressor and then separate oxygen through a molecular sieve. The power input module in the single-source input drive circuit provides the system with a power supply that is anti-interference and surge-proof, so that it can be branched in the subsequent circuit. The drive module is the power core of the oxygen generation function and can precisely control the compressor. The control power module provides multi-level voltage and low-noise control power for the intelligent control of the vehicle-mounted oxygen concentrator.

[0074] The first voltage (e.g., 12V) is a power stage voltage, primarily supplied to components requiring high-voltage drive or higher power. For example, the gate driver chip of a MOSFET in a drive module (such as IR2130, UCC27524, etc.) requires 12V to provide sufficient gate-source voltage difference to ensure reliable MOSFET turn-on / off. The compressor and power devices (such as MOSFETs) in a vehicle-mounted oxygen concentrator generate heat during operation; a 12V fan is used for active cooling to ensure the devices operate within a safe temperature range. Additionally, some pneumatic valves in vehicle-mounted oxygen concentrators (such as solenoid valves controlling molecular sieve adsorption / desorption) require 12V power to generate electromagnetic attraction, thus controlling the gas flow.

[0075] The second voltage (e.g., 5V) is an industrial-grade analog / peripheral voltage, primarily supplying sensors, communication interfaces, and medium-power peripherals. For example, pressure sensors (such as the AGR12, requiring 5V to monitor compressor discharge pressure), flow sensors (monitoring oxygen output flow), and temperature sensors (monitoring molecular sieve or motor temperature) in vehicle-mounted oxygen concentrators typically use 5V for power supply and signal reference. Similarly, CAN communication chips (the mainstream communication protocol in automotive environments) and RS485 interfaces (some debugging or expansion interfaces) require 5V to ensure communication stability. Additionally, if the oxygen concentrator is equipped with a small LCD screen or button panel, 5V provides its operating power (some screens also require 12V backlight power, separate from the 5V logic power supply).

[0076] The third voltage (e.g., 3.3V) is the core digital voltage, primarily supplying the digital chips in the control circuitry. For example, microcontrollers such as STM32 and PIC, which are the control brain of the oxygen concentrator, are responsible for analyzing sensor signals, generating PWM drive commands, and managing system logic; their core power supply is 3.3V. If the oxygen concentrator requires more complex algorithms (such as precise control of motor speed and optimization of oxygen production efficiency), a digital signal processor (DSP) or FPGA will use 3.3V as its core voltage. Additionally, storage chips such as EEPROM (which stores oxygen concentrator operating parameters and fault logs) and SPI Flash (which stores program firmware) typically use a 3.3V power supply.

[0077] The vehicle-mounted oxygen generator and single-source input drive circuit provided in this embodiment realize a complete process of drawing power from the vehicle's power supply, purifying and distributing the power, driving the compressor, and completing oxygen production. Meanwhile, considering the characteristics of the vehicle environment—strong electromagnetic interference, large voltage fluctuations, and compact space—the circuit employs solutions such as common-mode inductor EMI filtering, isolated ground design, and high-efficiency step-down chips to improve the system's reliability and efficiency in vehicle scenarios.

[0078] This embodiment provides a new energy source, including: the vehicle-mounted oxygen generator in any of the above embodiments.

[0079] It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. All other embodiments derived by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0080] Obviously, the accompanying drawings are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar situations based on these drawings without any creative effort. Furthermore, it is understood that although the work done in this development process may be complex and lengthy, for those skilled in the art, certain design, manufacturing, or production modifications made based on the technical content disclosed in this application are merely conventional technical means and should not be considered as insufficient disclosure of this application.

[0081] The term "embodiment" in this application refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily imply the same embodiment, nor does it imply that it is mutually exclusive with or alternative to other embodiments. It will be clearly or implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0082] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A single-source input drive circuit, characterized in that, Applications in vehicle-mounted oxygen generators; The single-source input drive circuit includes: a power input module, a drive module, and a control power module; the input terminal of the power input module is connected to the vehicle power supply, and the output terminal of the power input module is connected to the input terminal of the drive module and the input terminal of the control power module, respectively. The power input module is used to process the connected vehicle power supply to output a stable DC bus voltage. The output terminal of the drive module is connected to the compressor of the vehicle-mounted oxygen generator and is used to transform the DC bus voltage output by the power input module to drive the compressor. The output terminal of the control power module is connected to the control circuit of the vehicle-mounted oxygen generator, and is used to generate different levels of voltage from the DC bus voltage to power the control circuit.

2. The single-source input drive circuit according to claim 1, characterized in that, The power input module includes a first filter circuit and a bus capacitor connected in parallel between the positive and negative terminals of the DC bus.

3. The single-source input drive circuit according to claim 2, characterized in that, The power input module also includes a pre-charging circuit; The pre-charging circuit includes a resistor and a reverse polarity protection diode connected in series, and a switching transistor connected in parallel with the resistor and the reverse polarity protection diode.

4. The single-source input drive circuit according to claim 1, characterized in that, The drive module is a three-phase drive circuit; The three-phase drive circuit includes a three-phase bridge arm composed of 6 sets of switching transistors. One end of the upper bridge arm is connected to the positive terminal of the DC bus, and one end of the lower bridge arm is grounded.

5. The single-source input drive circuit according to claim 1, characterized in that, The control power supply module includes a multi-stage step-down module; The multi-stage step-down module is connected to the DC bus and is used to step down the DC bus voltage to obtain the first voltage, the second voltage, and the third voltage of the power rail.

6. The single-source input drive circuit according to claim 5, characterized in that, The multi-stage buck module includes a first buck chip, a second buck chip, and a third buck chip; The input terminal of the first step-down chip is connected to the DC bus, and is used to step down the DC bus voltage to generate a first voltage; The second step-down chip is used to step down the first voltage to generate a second voltage; The third step-down chip is used to step down the second voltage to generate a third voltage.

7. The single-source input drive circuit according to claim 5, characterized in that, The control power supply module further includes a second filter module; the input terminal of the second filter module is connected to the DC bus, and the output terminal of the second filter module is connected to the multi-stage step-down module.

8. The single-source input drive circuit according to claim 7, characterized in that, The second filtering module includes a common-mode inductor, with a capacitor connected to each side of the common-mode inductor.

9. A vehicle-mounted oxygen generator, characterized in that, include: The compressor, controller, sensor, communication module, and single-source input drive circuit as described in any one of claims 1 to 8.

10. A new energy vehicle, characterized in that, include: Vehicle power supply and the vehicle oxygen generator as described in claim 9.

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