Isolated power supply circuit system, inverter controller and vehicle

Abstract

The utility model provides an isolated power supply circuit system, an inverter controller and a vehicle, and relates to the technical field of vehicles. The isolation power supply circuit system comprises a plurality of power supply circuits, a transformer and a plurality of rectification units, the plurality of power supply circuits are respectively connected with a primary side of the transformer, the plurality of rectification units are respectively connected with a plurality of secondary side windings of the transformer in a one-to-one correspondence mode, and the plurality of secondary side windings are mutually isolated. According to the utility model, a topological form of multiple power inputs and multiple power outputs is realized by using a single transformer, the integration level of the whole power circuit system can be effectively improved, the backup requirement of an input power supply can be met through switching power supply of multiple power circuits, and the backup requirement of the input power supply can be met through mutual isolation of multiple secondary windings. And the isolation effect of different output power supplies can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to an isolated power supply circuit system, an inverter controller and a vehicle. Background Art

[0002] In new energy vehicles, the inverter controller can convert the DC power provided by the battery or supercapacitor into AC power to drive the motor. The inverter controller usually has functions such as current control, voltage control, over-temperature protection, over-current protection, short-circuit protection and fault diagnosis to ensure the driving performance of new energy vehicles.

[0003] In order to comply with relevant functional safety standards (such as ISO 26262) to ensure the safety of vehicle electronic systems, two power supplies are usually designed in the inverter controller for the required power input of the inverter controller. The two power supplies are the main power supply and the backup power supply. When one of the power supplies is lost, the other power supply will switch and provide power. However, since the two power supplies are independent of each other, the overall integration of the power circuit system is low. Utility Model Content

[0004] The problem solved by the utility model is how to improve the integration of the power circuit system of the inverter controller.

[0005] In order to solve the above problems, the utility model provides an isolated power supply circuit system, an inverter controller and a vehicle.

[0006] In the first aspect, the utility model provides an isolated power supply circuit system, comprising multiple power supply circuits, a transformer and multiple rectifier units, wherein the multiple power supply circuits are respectively connected to the primary side of the transformer, the multiple rectifier units are respectively connected to the multiple secondary windings of the transformer in a one-to-one correspondence, and the multiple secondary windings are isolated from each other.

[0007] Optionally, the primary side includes a plurality of primary windings isolated from each other, and the plurality of power supply circuits are respectively connected to the plurality of primary windings in a one-to-one correspondence.

[0008] Optionally, the rectifier unit includes a first rectifier unit and a second rectifier unit, the secondary winding includes a third winding and a fourth winding isolated from each other, the first rectifier unit is connected to the third winding, and the second rectifier unit is connected to the fourth winding.

[0009] Optionally, the third winding includes two interconnected coils, and the first rectifier unit includes a first diode, a second diode, a first capacitor, a second capacitor, a first resistor and a second resistor, wherein the first capacitor and the first resistor are connected in parallel, the second capacitor and the second resistor are connected in parallel, the first diode, the first capacitor and the first resistor in parallel, the second capacitor and the second resistor in parallel, the second diode and the third winding are connected in series in sequence, and the connection node of the first capacitor and the first resistor in parallel and the second capacitor and the second resistor in parallel is connected to the connection node of the two coils of the third winding; and / or, the second rectifier unit includes a third diode, a third capacitor, a third resistor and a fourth resistor, the third capacitor, the third resistor and the fourth resistor are connected in parallel, and the third capacitor, the third resistor and the fourth resistor in parallel are connected in series with the fourth winding and the third diode in sequence.

[0010] Optionally, the power supply circuit includes a power supply, and there are two power supply circuits, and the power supplies of the two power supply circuits are respectively a high voltage power supply and a low voltage power supply.

[0011] Optionally, the power supply circuit further includes a field effect transistor, and the power supply, the field effect transistor and the primary winding are connected in series.

[0012] Optionally, the isolated power supply circuit system also includes a driving chip, a high-voltage power management circuit and a low-voltage power management circuit, the driving chip is respectively connected to the high-voltage power management circuit and the low-voltage power management circuit, and the high-voltage power management circuit and the low-voltage power management circuit are respectively connected to the field effect transistors of the two power supply circuits.

[0013] Optionally, the power supply circuit further includes a branch connected in parallel with the primary winding, and the branch includes a capacitor and a branch diode connected in series.

[0014] The utility model also provides an inverter controller, comprising the above-mentioned isolation power supply circuit system.

[0015] The utility model also provides a vehicle, comprising the above inverter controller.

[0016] The isolated power supply circuit system of the utility model includes multiple power supply circuits, a transformer and multiple rectifier units. The multiple power supply circuits (for example, high-voltage power supply and / or low-voltage power supply) are connected to the primary side of the transformer for power supply. After the power supply current is converted by the transformer, the corresponding output voltage can be obtained at the output end of the transformer through the multiple rectifier units connected to the secondary side of the transformer. Therefore, the isolated power supply circuit system of the utility model uses a single transformer to realize a topological form of multiple power inputs and multiple power outputs, which can effectively improve the integration of the entire power supply circuit system. In addition, by switching power supply of multiple power supply circuits, the backup requirements of the input power supply can be met. By isolating the multiple secondary windings from each other, the isolation effect of different output power supplies can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the composition of the isolated power supply circuit system of an embodiment of the utility model;

[0018] Figure 2 It is a circuit diagram of an isolated power supply circuit system according to an embodiment of the present utility model.

[0019] Description of reference numerals:

[0020] 100-high voltage power supply, 101-fourth diode, 102-fifth diode, 103-first field effect transistor; 200-low voltage power supply, 201-sixth diode, 202-second field effect transistor; 301-first diode, 401-first capacitor, 501-first resistor; 302-second diode, 402-second capacitor, 502-second resistor; 303-third diode, 403-third capacitor, 503-third resistor, 504-fourth resistor. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] like Figure 1 As shown, an embodiment of the utility model provides an isolated power supply circuit system, including multiple power supply circuits, a transformer and multiple rectifier units, the multiple power supply circuits are respectively connected to the primary side of the transformer, the multiple rectifier units are respectively connected to the multiple secondary windings of the transformer in a one-to-one correspondence, and the multiple secondary windings are isolated from each other.

[0023] Specifically, combined Figure 2As shown, the isolated power supply circuit system includes multiple power supply circuits, transformers (such as high-frequency transformers) and multiple rectifier units. The multiple rectifier units are respectively connected to the multiple secondary windings of the transformer in a one-to-one correspondence, and the multiple secondary windings are isolated from each other. Both the high-voltage power supply and the low-voltage power supply can output voltages through the transformer and the rectifier units. The corresponding output voltage can be obtained at the output end (or secondary side) of the transformer through the multiple rectifier units, that is, a single transformer can be used to realize a topological form of multiple power inputs and power outputs, which effectively improves the integration of the transformer. At the same time, since the multiple secondary windings are isolated from each other, isolation of different output power supplies can be achieved.

[0024] For example, combined with Figure 2 As shown, the isolated power supply circuit system includes a high-voltage power supply circuit and a low-voltage power supply circuit, wherein the high-voltage power supply 100, the fourth diode 101, the first field effect transistor 103, the capacitor C4 and the fifth diode 102 (connected in series with C4) constitute the high-voltage power supply circuit, and the first winding (winding 1-2) of the primary side of the transformer is connected to the high-voltage power supply circuit; the low-voltage power supply 200, the second field effect transistor 202, the capacitor C5 and the sixth diode 201 (connected in series with C5) constitute the low-voltage power supply circuit, and the second winding (winding 3-4) of the primary side of the transformer is connected to the low-voltage power supply circuit. The isolated power supply circuit system of this embodiment may also include a low-voltage power supply management circuit (power supply control IC1) and a high-voltage power supply management circuit (power supply IC) to realize the switching power supply of the high-voltage power supply circuit and the low-voltage power supply circuit.

[0025] Combination Figure 2 As shown, the secondary side includes two secondary windings isolated from each other, and the two rectifier units are connected to the two secondary windings in a one-to-one correspondence. For example, one of the rectifier units is composed of a first diode 301, a second diode 302, a first capacitor 401, a second capacitor 402, a first resistor 501, and a second resistor 502, and the other rectifier unit is composed of a third diode 303, a third capacitor 403, a third resistor 503, and a fourth resistor 504, and the two secondary windings are connected to the two rectifier units respectively. Rectification is performed by the rectifier unit to obtain power supplies of different voltage levels isolated from each other. The integration and utilization rate of the transformer are improved by multiplexing the output windings.

[0026] Among them, the primary side is the side of the transformer where the electric energy is input, and the secondary side is the output side of the transformer. When the transformer is connected to the power supply, the current passes through the primary winding to generate a magnetic field. The change in the magnetic field leads to an induced voltage in the secondary winding, which in turn forms an output voltage. That is, the magnetic field generated by the current in the input winding will induce a magnetic flux in the iron core, and this magnetic flux will pass through the output winding, thereby generating an induced electromotive force in the output winding. According to Lenz's law, the direction of this induced electromotive force will cause the direction of the current flow in the output winding to produce an effect that hinders the change of the current in the input winding, so that the magnetic field generated in the output winding will also interact with the input winding, forming a feedback loop; this interaction leads to energy conversion in the transformer, so that the electric energy at the input end is converted into electric energy at the output end through the magnetic coupling of the transformer.

[0027] Among them, the number of turns of the secondary winding and the number of turns of the primary winding determine the change ratio between the output voltage and the input voltage (the transformation ratio of the transformer); the output voltage of the secondary side is usually used to supply the load in the circuit.

[0028] Optionally, the primary side includes a plurality of primary windings isolated from each other, and the plurality of power supply circuits are respectively connected to the plurality of primary windings in a one-to-one correspondence.

[0029] For example, combined with Figure 2 As shown, the primary side includes multiple primary windings isolated from each other, such as a first winding (winding 1-2) and a second winding (winding 3-4), a high voltage power supply circuit is connected to the first winding (winding 1-2), and a low voltage power supply circuit is connected to the second winding (winding 3-4).

[0030] Optionally, the rectifier unit includes a first rectifier unit and a second rectifier unit, the secondary winding includes a third winding and a fourth winding isolated from each other, the first rectifier unit is connected to the third winding, and the second rectifier unit is connected to the fourth winding.

[0031] Specifically, the rectifier unit includes a first rectifier unit and a second rectifier unit isolated from each other, the secondary winding includes a third winding and a fourth winding isolated from each other, the first rectifier unit is connected to the third winding, and the second rectifier unit is connected to the fourth winding, thereby realizing two output power supplies, and the two output power supplies are isolated from each other.

[0032] Optionally, the third winding includes two interconnected coils, and the first rectifier unit includes a first diode 301, a second diode 302, a first capacitor 401, a second capacitor 402, a first resistor 501 and a second resistor 502, wherein the first capacitor 401 and the first resistor 501 are connected in parallel, the second capacitor 402 and the second resistor 502 are connected in parallel, the first diode 301, the first capacitor 401 and the first resistor 501 in parallel, the second capacitor 402 and the second resistor 502 in parallel, the second diode 302 and the third winding are connected in series in sequence, and the connection node of the first capacitor 401 and the first resistor 501 in parallel and the second capacitor 402 and the second resistor 502 in parallel is connected to the connection node of the two coils of the third winding.

[0033] Optionally, the second rectifier unit includes a third diode 303, a third capacitor 403, a third resistor 503 and a fourth resistor 504, and the third capacitor 403, the third resistor 503 and the fourth resistor 504 are connected in parallel, and the parallel third capacitor 403, the third resistor 503 and the fourth resistor 504 are connected in series with the fourth winding and the third diode 303 in sequence.

[0034] Specifically, combined Figure 2 As shown, the third winding includes two interconnected coils, and the first rectifier unit includes a first diode 301, a second diode 302, a first capacitor 401, a second capacitor 402, a first resistor 501 and a second resistor 502, wherein the first capacitor 401 and the first resistor 501 are connected in parallel, the second capacitor 402 and the second resistor 502 are connected in parallel, the first diode 301, the parallel first capacitor 401 and the first resistor 501, the parallel second capacitor 402 and the second resistor 502, the second diode 302 and the third winding are connected in series in sequence, and the connection node of the parallel first capacitor 401 and the first resistor 501 and the parallel second capacitor 402 and the second resistor 502 is connected to the connection node of the two coils of the third winding, so that two symmetrical rectifier branches can be formed, thereby forming positive and negative output voltages, such as +15V and -15V output voltages.

[0035] The second rectifier unit includes a third diode 303, a third capacitor 403, a third resistor 503 and a fourth resistor 504. The third capacitor 403, the third resistor 503 and the fourth resistor 504 are connected in parallel. The parallel third capacitor 403, the third resistor 503 and the fourth resistor 504 are connected in series with the fourth winding and the third diode 303 in sequence, thereby forming an output voltage, for example, an output voltage of 5V.

[0036] A voltage measuring device may be connected to the output end of the rectifier unit to measure the output voltage; the switch S1 is used for load change test.

[0037] Optionally, the power supply circuit includes a power supply, and there are two power supply circuits, and the power supplies of the two power supply circuits are a high voltage power supply 100 and a low voltage power supply 200 respectively.

[0038] Specifically, combined Figure 2 As shown, the power supply circuit includes a power supply, and the power supplies of the two power supply circuits are respectively a high voltage power supply 100 and a low voltage power supply 200. When the high voltage power supply 100 or the low voltage power supply 200 fails, the other power supply can still provide voltage input to generate an output voltage, thereby ensuring the reliability of the power supply.

[0039] Optionally, the power supply circuit further includes a field effect transistor, and the power supply, the field effect transistor and the primary winding are connected in series.

[0040] Specifically, combined Figure 2 As shown, the isolated power supply circuit system also includes a first field effect transistor 103 and a second field effect transistor 202. The high-voltage power supply 100, the first field effect transistor 103 and the first winding (winding 1-2) are connected in series. The first field effect transistor 103 can form a first switching circuit (i.e., a high-voltage switching circuit) with the high-voltage power supply 100 and other components. The low-voltage power supply 200, the second field effect transistor 202 and the second winding (winding 3-4) are connected in series. The second field effect transistor 202 can form a second switching circuit (i.e., a low-voltage switching circuit) with the low-voltage power supply 200 and other components.

[0041] Among them, the gate of the first field effect transistor 103 is connected to the high-voltage power management circuit (power IC), the source is connected to port 2 of the driving chip (logic control part), and the drain is respectively connected to the positive electrode of the fifth diode 102 and the first winding (winding 1-2).

[0042] The gate of the second field effect transistor 202 is connected to the low voltage power management circuit (power control IC), the source is connected to the low voltage power supply 200, and the drain is respectively connected to the anode of the sixth diode 201 and the second winding (winding 3-4).

[0043] Optionally, the isolated power supply circuit system also includes a driving chip, a high-voltage power management circuit and a low-voltage power management circuit, the driving chip is respectively connected to the high-voltage power management circuit and the low-voltage power management circuit, and the high-voltage power management circuit and the low-voltage power management circuit are respectively connected to the field effect transistors of the two power supply circuits.

[0044] Specifically, combined Figure 2As shown, the isolated power supply circuit system also includes a driving chip (logic control part), a high-voltage power management circuit (power IC) and a low-voltage power management circuit (power control IC1). The high-voltage power management circuit is respectively connected to the driving chip and the first field effect transistor 103, and the low-voltage power management circuit is respectively connected to the driving chip and the second field effect transistor 202. The regulation voltages of the high-voltage power management circuit and the low-voltage power management circuit can be adjusted through the driving chip.

[0045] Among them, port No. 1 of the driving chip is respectively connected to the positive electrode of the fourth diode 101 and the positive electrode of the high-voltage power supply 100 (high voltage common ground), port No. 2 is respectively connected to the negative electrode of the high-voltage power supply 100 and the source of the first field effect transistor 103, port No. 3 is connected to the low-voltage power supply 200, and port No. 4 is respectively connected to the high-voltage power supply management circuit and the low-voltage power supply management circuit.

[0046] Among them, the driving chip includes a power management unit and a voltage sampling unit. The power management unit is used to set the adjustment voltage of the high-voltage power management circuit and the low-voltage power management circuit, such as setting a first set voltage or the like, and to manage the operating status of the high-voltage power management circuit and the low-voltage power management circuit, such as realizing the switching of the high-voltage power management circuit and the low-voltage power management circuit; the voltage sampling unit is used to manage the voltage sampling of the high-voltage power management circuit and the low-voltage power management circuit, so that the power supply voltage of the high-voltage power management circuit (the voltage across the third winding) and the power supply voltage of the low-voltage power management circuit (the voltage across the fourth winding) can be sampled respectively through the high-voltage power management circuit and the low-voltage power management circuit, or the power supply voltage of the high-voltage power management circuit and the low-voltage power management circuit can be directly sampled, so as to realize the switching of the high-voltage power management circuit and the low-voltage power management circuit according to the sampled voltage.

[0047] Among them, the working principles of the high voltage power supply circuit and the low voltage power supply circuit are as follows:

[0048] (1) The low-voltage power supply 200 is a starting power supply. When the power supply voltage corresponding to the low-voltage power supply 200 (the voltage across the fourth winding) exceeds the set voltage Vm, it automatically starts. At this time, the driver chip drives the corresponding low-voltage power management circuit to start, and the output end of the transformer outputs the voltage.

[0049] (2) The driver chip (logic control part) sets the first set voltage V g1 As the adjustment threshold (when the supply voltage corresponding to the high voltage power supply 100 exceeds the first set voltage V g1 The high voltage power supply is started, and the supply voltage corresponding to the high voltage power supply 100 is lower than the first set voltage V g1 The high voltage power supply 100 is turned off and the low voltage power supply 200 is turned on to make the secondary side power supply output stable.

[0050] (3) After the high voltage power supply 100 is started, when the corresponding high voltage power supply 100 supply voltage (the voltage across the third winding) exceeds V m2 When the high voltage power management circuit is started, the driver chip drives the high voltage power management circuit to start, and synchronously drives the low voltage power management circuit to switch to the sleep mode (ie, the low voltage power supply is in a non-working state).

[0051] (4) After the high voltage power supply 100 is started, the driver chip is adjusted again to set the second set voltage V g2 As the regulation threshold, the secondary side voltage is output stably.

[0052] (5) When the high voltage power supply 100 is suddenly lost, the secondary voltage will drop. Under the mutual induction between the primary winding and the secondary winding of the transformer, the corresponding supply voltage of the low voltage power supply 200 will also drop. When the supply voltage of the low voltage power supply 200 drops to the third set voltage V g3 (V g2 +50V), the driver chip drives the high-voltage power supply circuit to enter the sleep mode and starts the low-voltage power supply circuit synchronously to keep the secondary side output circuit stable.

[0053] Among them, the high voltage power management circuit and the low voltage power management circuit usually have the following functions:

[0054] (1) Power switching and regulation: Control the switching and output voltage of the power supply to ensure a stable power supply.

[0055] (2) Voltage regulation: It provides voltage regulation function and can adjust the output voltage as needed (for example, 15V and -15V, etc.).

[0056] (3) Current regulation: manages output current and protects the circuit from faults such as overload and short circuit.

[0057] (4) Power management: Manage the power supply startup, shutdown, overvoltage protection, undervoltage protection, overcurrent protection and other functions to ensure the safe and reliable operation of the power supply.

[0058] (5) Monitoring and feedback: Monitoring input and output voltage, current, temperature and other parameters (e.g. monitoring Figure 2 The output voltage measurement process in the circuit is completed) and a feedback signal is provided to the driver chip to realize closed-loop control and protection functions.

[0059] (6) Energy-saving function: Energy saving and power consumption reduction are achieved by dynamically adjusting the working status and efficiency of the power supply.

[0060] Among them, the high-voltage power management circuit and the low-voltage power management circuit can achieve the following functions by controlling the conduction and cutoff of the field effect tube:

[0061] (1) Switching regulation: The switching regulation of power supply output is achieved by controlling the conduction and cutoff of the field effect tube. When the field effect tube is turned on, the power supply output path is closed, the current flows, and power is supplied; when the field effect tube is turned off, the path is disconnected, and power is cut off.

[0062] (2) Current control: The current can be controlled by adjusting the conduction time of the field effect tube, thereby realizing the current control function.

[0063] (3) Voltage regulation: The output voltage can be adjusted by controlling the conduction and cutoff of the field effect transistor to achieve the voltage regulation function.

[0064] (4) Protection function: It can monitor the working status of the power supply and control the conduction and cutoff of the field effect tube as needed to realize the overcurrent protection, overvoltage protection, undervoltage protection and other functions of the power supply.

[0065] Optionally, the power supply circuit further includes a branch connected in parallel with the primary winding, and the branch includes a capacitor and a branch diode connected in series.

[0066] Specifically, combined Figure 2 As shown, the high-voltage power supply circuit also includes a first branch connected in parallel with the first winding (winding 1-2), and the low-voltage power supply circuit also includes a second branch connected in parallel with the second winding (winding 3-4), the first branch includes a capacitor C4 and a fifth diode 102 connected in series, and the second branch includes a capacitor C5 and a sixth diode 201 connected in series.

[0067] Another embodiment of the present invention provides an inverter controller, comprising the above-mentioned isolation power supply circuit system.

[0068] Inverter controllers usually have the following functions:

[0069] (1) Current control and voltage control: Ensure that the output current and voltage are within a certain range to meet the performance requirements of electric vehicles.

[0070] (2) Overtemperature protection: Monitor the temperature of the controller and power module and take appropriate measures to prevent overheating, such as reducing output power or shutting down the system.

[0071] (3) Overcurrent protection: Detects whether the output current exceeds the safe range and takes necessary measures to prevent damage to the controller or other related components.

[0072] (4) Short circuit protection: Detect whether the output circuit is short-circuited and disconnect the power supply in time to prevent circuit damage.

[0073] (5) Fault diagnosis: Monitor the operating status of the controller and related sensors, and promptly identify and report faults to ensure timely maintenance and repair.

[0074] Among them, ISO 26262 is an international standard for ensuring the functional safety of automotive electronic systems. ISO26262 includes a series of safety management processes and technical requirements for developing and verifying automotive electronic systems to ensure safe operation in the face of faults. Inverter controllers need to comply with the safety standards of ISO 26262.

[0075] The power supply circuit is the core part of the entire controller design. In the inverter controller of this embodiment, the isolated power supply circuit system designs multiple power supplies for the controller's required power input. When one of the power supplies is lost, the other power supply will switch and provide power, with high reliability and stability. In addition, the power supply of multiple power supplies is realized through different windings on the primary side of the transformer, and the power supply of multiple different voltage levels is realized through the multiple rectifier units on the secondary side of the transformer, which improves the integration of the transformer and can meet the power supply requirements of multiple voltage levels.

[0076] Another embodiment of the utility model provides a vehicle, comprising the above-mentioned inverter controller.

[0077] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. An isolated power supply circuit system, characterized in that: It includes multiple power supply circuits, transformers and multiple rectifier units. The multiple power supply circuits are respectively connected to the primary side of the transformer, the multiple rectifier units are respectively connected to the multiple secondary windings of the transformer in a one-to-one correspondence, and the multiple secondary windings are isolated from each other.

2. The isolated power supply circuit system according to claim 1, characterized in that: The primary side includes a plurality of primary windings isolated from each other, and the plurality of power supply circuits are respectively connected to the plurality of primary windings in a one-to-one correspondence.

3. The isolated power supply circuit system according to claim 1, characterized in that: The rectifier unit includes a first rectifier unit and a second rectifier unit, the secondary winding includes a third winding and a fourth winding isolated from each other, the first rectifier unit is connected to the third winding, and the second rectifier unit is connected to the fourth winding.

4. The isolated power supply circuit system according to claim 3, characterized in that: The third winding comprises two sections of coils connected to each other, and the first rectifying unit comprises a first diode (301), a second diode (302), a first capacitor (401), a second capacitor (402), a first resistor (501) and a second resistor (502), wherein the first capacitor (401) and the first resistor (501) are connected in parallel, the second capacitor (402) and the second resistor (502) are connected in parallel, the first diode (301), the first capacitor (401) and the first resistor (501) connected in parallel, the second capacitor (402) and the second resistor (502) connected in parallel, the second diode (302) and the third winding are connected in series in sequence, and a connection node between the first capacitor (401) and the first resistor (501) connected in parallel and the second capacitor (402) and the second resistor (502) connected in parallel is connected to a connection node of the two sections of coils of the third winding; And / or, the second rectifying unit comprises a third diode (303), a third capacitor (403), a third resistor (503) and a fourth resistor (504), the third capacitor (403), the third resistor (503) and the fourth resistor (504) are connected in parallel, and the third capacitor (403), the third resistor (503) and the fourth resistor (504) connected in parallel are connected in series with the fourth winding and the third diode (303) in sequence.

5. The isolated power supply circuit system according to claim 1, characterized in that: The power supply circuit comprises a power supply. There are two power supply circuits, and the power supplies of the two power supply circuits are respectively a high voltage power supply (100) and a low voltage power supply (200).

6. The isolated power supply circuit system according to claim 5, characterized in that: The power supply circuit also includes a field effect transistor, and the power supply, the field effect transistor and the primary winding are connected in series.

7. The isolated power supply circuit system according to claim 6, characterized in that: It also includes a driving chip, a high-voltage power management circuit and a low-voltage power management circuit. The driving chip is connected to the high-voltage power management circuit and the low-voltage power management circuit respectively. The high-voltage power management circuit and the low-voltage power management circuit are connected to the field effect transistors of the two power circuits respectively.

8. The isolated power supply circuit system according to claim 5, characterized in that: The power supply circuit also includes a branch connected in parallel with the primary winding, and the branch includes a capacitor and a branch diode connected in series.

9. An inverter controller, characterized in that: An isolated power supply circuit system comprising any one of claims 1 to 8.

10. A vehicle, characterized in that: Includes the inverter controller as described in claim 9.

Images