Motor controller of vehicle and control method thereof

Abstract

The invention relates to the technical field of vehicle motor control, and discloses a vehicle motor controller and a control method thereof. The main control module is provided with a first enable signal end, a first control signal end and a second control signal end; the driving module is respectively connected with the main control module and the IGBT module; the logic circuit module is respectively connected with the power management module and the driving module, and is also respectively connected with a first enable signal end, a first control signal end and a second control signal end; when the electric drive system has a preset safety fault state, the power management module, the first enable signal end, the first control signal end and the second control signal end input electric signals, so that the drive module enters a safety state mode. Therefore, the main control module and the power management module jointly output an electric signal to enable the controller to enter the ASC state, the controller can enter the ASC state even if the main control module breaks down, and then good protection on a motor system is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle motor control, and in particular to a vehicle motor controller and a control method thereof. Background Art

[0002] When permanent magnet synchronous motors are widely used as drive motors for new energy vehicles, if a serious fault occurs in the motor system, such as a serious fault in the motor controller, such as overcurrent, overvoltage, etc., the motor controller will perform a shutdown operation. At present, for the shutdown strategy of the motor controller, when the motor controller determines that certain conditions are met, it will use a three-phase active short circuit protection method (Active Short Circuit, ASC) to perform a shutdown operation.

[0003] The motor controller is based on the existing architecture and related shutdown strategies. The shutdown operation does not take into account the situation when the controller software works abnormally, such as damage to the main control chip, which leads to the inability to identify and enter the ASC. As a result, the shutdown operation cannot be performed in some application scenarios, which poses a safety hazard to the motor system. Summary of the invention

[0004] In view of the above problems, the present application provides a vehicle motor controller and a control method thereof, in which the main control module and the power management module jointly output electrical signals to enable the controller to enter the ASC state. Even if the main control module fails, it can still enter the ASC state, thereby achieving good protection for the motor system.

[0005] In a first aspect, the present application provides a motor controller for a vehicle, comprising: a power management module connected to a low-voltage power supply; a main control module connected to the power management module, the main control module being provided with a first enable signal terminal, a first control signal terminal and a second control signal terminal; a drive module and an IGBT module, the drive module being connected to the main control module and the IGBT module respectively, the drive module driving the IGBT module under the control of the main control module; a logic circuit module connected to the power management module and the drive module respectively, the logic circuit module being further connected to the first enable signal terminal, the first control signal terminal and the second control signal terminal respectively; wherein, when the electric drive system to which the main control module belongs has a preset safety fault state, the power management module, the first enable signal terminal, the first control signal terminal and the second control signal terminal respectively input electrical signals to the logic circuit module to enable the drive module to enter a safe state mode, so as to control the IGBT module to enter an ASC state through the drive module.

[0006] In some specific embodiments, the electric drive system to which the main control module belongs has a preset safety fault state, and the power supply state of the power module to the power management module is in a preset normal state, and when the main control module is in a preset abnormal working state, the power management module outputs a low-level signal to enable the drive module to enter a safe state mode to control the IGBT module to enter the ASC state.

[0007] In some specific embodiments, the electric drive system to which the main control module belongs has a preset safety fault state, and the power supply state of the power module to the power management module is in a preset normal state, and the main control module is in a preset normal working state; the power management module, the first enable signal terminal, the first control signal terminal and the second control signal terminal respectively output a high level signal, a low level signal, a low level signal and a high level signal, or respectively output a high level signal, a low level signal, a high level signal and a low level signal, so that the drive module enters a safe state mode to control the IGBT module to enter the ASC state.

[0008] In some specific embodiments, the driving module includes an upper bridge driving module and a lower bridge driving module, and both the upper bridge driving module and the lower bridge driving module include a third control signal terminal and a second enable signal terminal; wherein, the logic circuit module inputs a low level signal to the third control signal terminal and the second enable signal terminal of the upper bridge driving module based on the low level signal output by the power management module, the electrical signal output by the first enable signal terminal, the first control signal terminal and the second control signal terminal, and inputs a low level signal and a high level signal to the third control signal terminal and the second enable signal terminal of the lower bridge driving module, so that the lower bridge driving module enters a safe state mode.

[0009] In some specific embodiments, the logic circuit module inputs a low level signal to the third control signal terminal of the upper bridge driving module and the third control signal terminal of the lower bridge driving module based on the electrical signal output by the first enable signal terminal and the low level signal output by the power management module; the logic circuit module inputs a low level signal to the second enable signal terminal of the upper bridge driving module based on the electrical signal output by the first control signal terminal and the low level signal output by the power management module; the logic circuit module inputs a high level signal to the second enable signal terminal of the lower bridge driving module based on the electrical signal output by the second control signal terminal and the low level signal output by the power management module.

[0010] In some specific embodiments, the logic circuit module is provided with a first AND gate logic circuit, the first AND gate logic circuit includes a first AND gate input terminal, a second AND gate input terminal and a first AND gate output terminal, the first AND gate input terminal and the second AND gate input terminal are respectively connected to the power management module and the first enable signal terminal, and the first AND gate output terminal is connected to the third control signal terminal of the upper bridge driver module; the logic circuit module is provided with a second AND gate logic circuit, the second AND gate logic circuit includes a third AND gate input terminal, a fourth AND gate input terminal and a second AND gate output terminal, the third AND gate input terminal and the fourth AND gate input terminal are respectively connected to the power management module and the first control signal terminal, and the second AND gate output terminal is connected to the second enable signal terminal of the upper bridge driver module.

[0011] In some specific embodiments, the first AND gate output terminal is connected to the third control signal terminal of the lower bridge driving module; the logic circuit module also includes a third AND gate logic circuit, an OR gate logic circuit and a NOT gate logic circuit, the third AND gate logic circuit includes a fifth AND gate input terminal, a sixth AND gate input terminal and a third AND gate output terminal, the fifth AND gate input terminal and the sixth AND gate input terminal are respectively connected to the power management module and the second control signal terminal, the first OR gate input terminal of the OR gate logic circuit is connected to the third AND gate output terminal, one end of the NOT gate logic circuit is connected to the power management module, the other end of the NOT gate logic circuit is connected to the second OR gate input terminal of the OR gate logic circuit, and the output terminal of the OR gate logic circuit is connected to the second enable signal terminal of the lower bridge driving module.

[0012] In some specific embodiments, the motor controller also includes a high-voltage auxiliary source module, which is respectively connected to the logic circuit module and the drive module, and the high-voltage auxiliary source module is connected to the high-voltage power supply; wherein, when the electric drive system to which the main control module belongs has a preset safety fault state, and the power supply state of the low-voltage power supply to the power management module is in a preset abnormal state, the high-voltage auxiliary source module supplies power to the logic circuit module and the drive module, and the power management module, the first enable signal terminal, the first control signal terminal and the second control signal terminal all output low-level signals.

[0013] A second aspect of the present application provides a control method for a motor controller of a vehicle, and the control method is based on the motor controller of any of the above-mentioned vehicles, and the control method includes: detecting the current working state of the electric drive system to which the main control module belongs; wherein the working state of the electric drive system includes a preset safety fault state and a preset normal state; when it is detected that the electric drive system has a preset safety fault state, an electrical signal is input to the logic circuit module through the power management module, the first enable signal terminal, the first control signal terminal and the second control signal terminal respectively, so that the drive module enters a safe state mode.

[0014] In some specific embodiments, when it is detected that the electric drive system has a preset safety fault state, an electrical signal is input to the logic circuit module through the power management module, the first enable signal terminal, the first control signal terminal and the second control signal terminal respectively, so that the drive module enters a safe state mode. The steps include: the electric drive system to which the main control module belongs has a preset safety fault state, and the power supply state of the power module to the power management module is in a preset normal state, and the main control module is in a preset abnormal working state, then a low-level signal is output through the power management module to make the drive module enter the safe state mode, so as to control the IGBT module to enter the ASC state.

[0015] The present application has at least the following beneficial technical effects: the motor controller and control method of the vehicle provided by the present application include: a power management module, connected to a low-voltage power supply; a main control module, connected to the power management module, the main control module is provided with a first enable signal terminal, a first control signal terminal and a second control signal terminal; a drive module and an IGBT module, the drive module is respectively connected to the main control module and the IGBT module, and the drive module drives the IGBT module under the control of the main control module; a logic circuit module, respectively connected to the power management module and the drive module, the logic circuit module is also respectively connected to the first enable signal terminal, the first control signal terminal and the second control signal terminal; wherein, when the electric drive system to which the main control module belongs has a preset safety fault state, the power management module, the first enable signal terminal, the first control signal terminal and the second control signal terminal respectively input electrical signals to the logic circuit module to enable the drive module to enter a safe state mode, so as to control the IGBT module to enter an ASC state through the drive module. Therefore, through the setting of the logic circuit, the main control module and the power management module jointly output a specific electrical signal to make the controller enter the ASC state. Even if the main control module fails, it can enter the ASC state, thereby achieving good protection for the motor system.

[0016] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0018] Figure 1 is a structural block diagram of an embodiment of a motor controller for a vehicle provided by the present application;

[0019] Figure 2is a circuit diagram of an embodiment of a motor controller for a vehicle provided by the present application;

[0020] Figure 3 It is a diagram of the electrical signals of the motor controller of the vehicle;

[0021] Figure 4 is another diagram of the electrical signals of the motor controller of the vehicle;

[0022] Figure 5 is another diagram of electrical signals of a motor controller of a vehicle;

[0023] Figure 6 is another diagram of electrical signals of a motor controller of a vehicle;

[0024] Figure 7 It is a flow chart of an embodiment of a control method of a motor controller of a vehicle provided in the present application.

[0025] Explanation of the accompanying drawings: a motor controller 100 of a vehicle, a power management module 10, a main control module 20, a first enable signal terminal 21, a first control signal terminal 22, a second control signal terminal 23, a first PWM signal terminal 24, a second PWM signal terminal 25, a drive module 30, an upper bridge drive module 31, a lower bridge drive module 32, a third control signal terminal 33, a second enable signal terminal 34, a third PWM signal terminal 35, a fourth PWM signal terminal 36, an IGBT module 40, a logic circuit module 50, a first AND gate logic circuit 51, a second AND gate logic circuit 52, a third AND gate logic circuit 53, an OR gate logic circuit 54, a NOT gate logic circuit 55, a power supply module 60, a high-voltage auxiliary source module 70, and a high-voltage power supply 80. DETAILED DESCRIPTION

[0026] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0027] If there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0028] In a first aspect, the present application provides a motor controller 100 for a vehicle, which is applied to a new energy vehicle and is specifically used to control a driving motor of the vehicle, wherein the controlled driving motor may be a permanent magnet synchronous motor, which has the characteristics of high power density, high efficiency, etc.

[0029] Figure 1 It is a structural block diagram of an embodiment of a motor controller 100 for a vehicle provided in the present application.

[0030] Combination Figure 1 The motor controller 100 of the vehicle includes a power management module 10, a main control module 20, a drive module 30, an IGBT module 40 and a logic circuit module 50. The main control module 20 is connected to the power management module 10, and the drive module 30 is respectively connected to the main control module 20 and the IGBT module 40. The logic circuit module 50 is directly connected to the power management module 10, the main control module 20 and the drive module 30, respectively, so that the power management module 10, the main control module 20 and the drive module 30 are indirectly connected to each other through the logic circuit module 50, and the processing of electrical signals between each IGBT module 40 is realized. Among them, the logic circuit module 50 includes a connection circuit and related functional devices.

[0031] Furthermore, the motor controller 100 of the vehicle may further include a power module 60, which is respectively connected to an external low-voltage power supply, a power management module 10, a drive module 30, and a logic circuit module 50. The external low-voltage power supply may be a 12V power supply, which directly supplies power to the power module 60, which directly supplies power to the power management module 10, the drive module 30, and the logic circuit module 50, and the power management module 10 indirectly supplies power to the main control module 20.

[0032] Specifically, the power management module 10, the main control module 20, the drive module 30 and the logic circuit module 50 can all be arranged in the motor controller in the form of a chip. The power management module 10 is used to realize the access and management of the low-voltage power supply. The main control module 20 is the core of the motor controller 100 of the vehicle, and mainly realizes the control of the drive module 30 and the like through the reception and output of signals. The drive module 30 can drive the IGBT module 40 under the control of the main control module 20 to control the specific working state of the drive motor through the IGBT module 40. When the main control module 20 sends different control signals to the drive module 30, the drive module 30 has different working states, and then the IGBT module 40 has different working states, so that the drive motor has different working states.

[0033] Figure 2 1 is a circuit diagram of an embodiment of a motor controller 100 for a vehicle provided in the present application.

[0034] Combination Figure 2 , the main control module 20 is provided with a first enable signal terminal 21, a first control signal terminal 22 and a second control signal terminal 23, which are respectively used to output electrical signals, and the electrical signals include low-level signals and high-level signals. In combination with the above content, when the main control module 20 exists in the form of a chip, the first enable signal terminal 21, the first control signal terminal 22 and the second control signal terminal 23 are respectively embodied as the first enable signal pin, the first control signal pin and the second control signal pin of the chip. Of course, when there are multiple pins on the chip, any pin can be used as the first enable signal pin through specific settings to adapt to the specific needs of different application scenarios. Of course, the same is true for the setting method of the first control signal pin and the second control signal pin.

[0035] Regarding the connection method between the logic circuit module 50 and the main control module 20, combined with the above content, the logic circuit module 50 is respectively connected to the first enable signal terminal 21, the first control signal terminal 22 and the second control signal terminal 23 to realize the connection between the logic circuit module 50 and the main control module 20.

[0036] Based on the specific setting method of the above-mentioned logic circuit module 50, when the electric drive system to which the main control module 20 belongs has a preset safety fault state, the power management module 10, the first enable signal terminal 21, the first control signal terminal 22 and the second control signal terminal 23 respectively input electrical signals to the logic circuit module 50 to enable the drive module 30 to enter the safe state mode, so as to control the IGBT module 40 to enter the ASC state through the drive module 30.

[0037] Specifically, at this time, the state detection of the electric drive system can be realized through the main control module 20, and the electric drive system includes the motor controller 100 of the vehicle and the drive motor. The various parameters of the preset safety fault state are preset. When it is detected that the current working parameters of the electric drive system correspond to the parameters of the preset safety fault state, it is determined that the electric drive system is in the preset safety fault state. When the electric drive system is in the preset safety fault state, it means that the electric drive system has a more serious safety fault. At this time, it is necessary to make the motor controller 100 of the vehicle enter the three-phase active short-circuit protection state, that is, enter the ASC state. Control the motor controller 100 of the vehicle to enter the ASC state, that is, control the IGBT module 40 to enter the ASC state. In this embodiment, we specifically input electrical signals to the logic circuit module 50 through the power management module 10, the first enable signal terminal 21, the first control signal terminal 22 and the second control signal terminal 23, so that the drive module 30 enters the safe state mode, and realizes that the main control module 20 and the power management module 10 jointly output electrical signals to make the controller enter the ASC state. At this time, even if the main control module 20 fails, the IGBT module 40 can enter the ASC state with the assistance of the electrical signal output by the power management module 10, thereby achieving good protection for the motor system.

[0038] For a more specific control method of the motor controller 100 of the vehicle in the above embodiment, in some specific embodiments, the electric drive system to which the main control module 20 belongs has a preset safety fault state, and the power supply state of the power supply module 60 to the power management module 10 is in a preset normal state, and when the main control module 20 is in a preset abnormal working state, the power management module 10 outputs a low-level signal to enable the drive module 30 to enter a safe state mode to control the IGBT module 40 to enter the ASC state.

[0039] Specifically, the power supply module 60 has a preset normal state and a preset abnormal state for the power supply state of the power management module 10. When the power supply state of the power management module 10 by the power module 60 is in the preset normal state, the power supply of the power management module 10, the main control module 20, the drive module 30 and the logic circuit is normal. When the power supply of the power management module 10 is normal, the power management module 10 can output both high-level signals and low-level signals. The main control module 20 also has a preset normal working state and a preset abnormal working state. When the main control module 20 is in the preset normal working state, each signal end can output a specific electrical signal. When the main control module 20 is in the preset abnormal working state, the electrical signals output by each signal end of the main control module 20 may be uncontrollable. In this embodiment, when the main control module 20 is in the preset abnormal working state, there is no requirement for the type of electrical signals output by each signal end thereof, that is, at this time, only the power management module 10 needs to output a low-level signal to make the IGBT module 40 enter the ASC state.

[0040] It should be understood that in this embodiment, if an abnormality occurs in the main control module 20, the IGBT module 40 can enter the ASC state through the low-level signal output by the power management module 10. Therefore, based on this embodiment, even if an abnormality occurs in the main control module 20, the IGBT module 40 can enter the ASC state through the low-level signal output by the power management module 10, so as to achieve good protection for the motor system.

[0041] The above embodiment describes a specific method for entering the ASC state when the main control module 20 works abnormally. The following describes a specific method for entering the ASC state when the main control module 20 works normally:

[0042] In some specific embodiments, the electric drive system to which the main control module 20 belongs has a preset safety fault state, and the power supply state of the power module 60 to the power management module 10 is in a preset normal state, and when the main control module 20 is in a preset normal working state, the power management module 10, the first enable signal terminal 21, the first control signal terminal 22 and the second control signal terminal 23 respectively output a high level signal, a low level signal, a low level signal and a high level signal.

[0043] At this time, since the power management module 10 is powered normally, it can output a high level. The main control module 20 is in a preset normal working state, and it can control the specific type of the electrical signal of each signal end respectively.

[0044] Figure 3 is a diagram of the electrical signals of the motor controller 100 of the vehicle. Figure 3 , high-level signals are indicated by the symbol H, and low-level signals are indicated by the symbol L.

[0045] Combination Figure 2 as well as Figure 3 The driving module 30 includes an upper bridge driving module 31 and a lower bridge driving module 32, and both the upper bridge driving module 31 and the lower bridge driving module 32 include a third control signal terminal 33 and a second enable signal terminal 34. Wherein, both the upper bridge driving module 31 and the lower bridge driving module 32 include three transistors respectively, and the states of the three transistors specifically determine whether the upper bridge driving module 31 or the lower bridge driving module 32 is in a safe state mode.

[0046] At this time, the third control signal terminal 33 of the upper bridge driving module 31 receives the low level signal output by the logic circuit module 50, and the second enable signal terminal 34 of the upper bridge driving module 31 receives the low level signal output by the logic circuit module 50. The third control signal terminal 33 of the lower bridge driving module 32 receives the low level signal output by the logic circuit module 50, and the second enable signal terminal 34 of the lower bridge driving module 32 receives the high level signal output by the logic circuit. Whether it is the upper bridge driving module 31 or the lower bridge driving module 32, only when the third control signal terminal 33 and the second enable signal terminal 34 receive the low level and high level signals respectively, will they enter the safe state mode. In this embodiment, the lower bridge driving module 32 will enter the safe state mode, and the upper bridge driving module 31 will not enter the safe state mode. At this time, the entire driving module 30 enters the safe state mode. It should be understood that when one of the upper bridge driving module 31 and the lower bridge driving module 32 enters the safe state mode, the entire driving module 30 enters the safe state mode. Furthermore, compared to the upper bridge drive module 31 and the lower bridge drive module 32 entering the safe state mode at the same time, the present application enters the safe state mode through the upper bridge drive module 31 or the lower bridge drive module 32, which can avoid problems such as DC bus overvoltage, damage to components on the bus, and safety risks caused by unexpectedly large braking torque output by the motor.

[0047] In some specific embodiments, the electric drive system to which the main control module 20 belongs has a preset safety fault state, and the power supply state of the power supply module 60 to the power management module 10 is in a preset normal state, and when the main control module 20 is in a preset normal working state, the power management module 10, the first enable signal terminal 21, the first control signal terminal 22 and the second control signal terminal 23 respectively output a high level signal, a low level signal, a high level signal and a low level signal, so that the drive module 30 enters a safe state mode to control the IGBT module 40 to enter the ASC state.

[0048] Figure 4 is another diagram of electrical signals of the motor controller 100 of the vehicle.

[0049] At this time, the third control signal terminal 33 of the upper bridge driving module 31 receives the low level signal output by the logic circuit module 50, and the second enable signal terminal 34 of the upper bridge driving module 31 receives the high level signal output by the logic circuit module 50. The third control signal terminal 33 of the lower bridge driving module 32 receives the low level signal output by the logic circuit module 50, and the second enable signal terminal 34 of the lower bridge driving module 32 receives the low level signal output by the logic circuit. In this embodiment, the upper bridge driving module 31 will enter the safe state mode, and the lower bridge driving module 32 will not enter the safe state mode. At this time, the entire driving module 30 enters the safe state mode.

[0050] The specific method of entering the ASC state when the main control module 20 works abnormally is further described below:

[0051] In combination with the above-mentioned implementation method in which the power management module 10 outputs a low-level signal when the main control module 20 is in a preset abnormal working state, the driving module 30 enters a safe state mode, so as to control the IGBT module 40 to enter an ASC state.

[0052] Figure 5 is another diagram illustrating electrical signals of the motor controller 100 of the vehicle.

[0053] Combination Figure 5 The logic circuit module 50 inputs low level signals to the third control signal terminal 33 and the second enable signal terminal 34 of the upper bridge driving module 31 based on the low level signal output by the power management module 10, the electrical signals output by the first enable signal terminal 21, the first control signal terminal 22 and the second control signal terminal 23, and inputs low level signals and high level signals to the third control signal terminal 33 and the second enable signal terminal 34 of the lower bridge driving module 32, so that the lower bridge driving module 32 enters the safe state mode.

[0054] At this time, the lower bridge driving module 32 enters the safe state mode, and the upper bridge driving module 31 does not enter the safe state mode. In addition, at this time, the electrical signals output by the first enable signal terminal 21, the first control signal terminal 22 and the second control signal terminal 23 can be high-level signals or low-level signals, which do not affect the result of the lower bridge driving module 32 entering the safe state mode.

[0055] Based on the above embodiment, the specific method of entering the ASC state when the main control module 20 works abnormally is further described:

[0056] In some specific embodiments, the logic circuit module 50 inputs a low level signal to the third control signal terminal 33 of the upper bridge driver module 31 and the third control signal terminal 33 of the lower bridge driver module 32 based on the electrical signal output from the first enable signal terminal 21 and the low level signal output from the power management module 10. The logic circuit module 50 inputs a low level signal to the second enable signal terminal 34 of the upper bridge driver module 31 based on the electrical signal output from the first control signal terminal 22 and the low level signal output from the power management module 10. The logic circuit module 50 inputs a high level signal to the second enable signal terminal 34 of the lower bridge driver module 32 based on the electrical signal output from the second control signal terminal 23 and the low level signal output from the power management module 10.

[0057] It should be understood that this embodiment limits the source of the electrical signal of each signal terminal of the driving module 30. At this time, the low-level signal input to the third control signal terminal 33 of the upper bridge driving module 31 and the third control signal terminal 33 of the lower bridge driving module 32 is derived from the electrical signal output by the first enable signal terminal 21 and the low-level signal output by the power management module 10. The low-level signal input to the second enable signal terminal 34 of the upper bridge driving module 31 is derived from the electrical signal output by the first control signal terminal 22 and the low-level signal output by the power management module 10, and the high-level signal input to the second enable signal terminal 34 of the lower bridge driving module 32 is derived from the electrical signal output by the second control signal terminal 23 and the low-level signal output by the power management module 10. At this time, the logic circuit module 50 realizes the signal conversion function.

[0058] The specific configuration of the logic circuit module 50 in the above embodiment is now further described:

[0059] Combination Figure 5 , the logic circuit module 50 is provided with a first AND gate logic circuit 51, the first AND gate logic circuit 51 includes a first AND gate input terminal, a second AND gate input terminal and a first AND gate output terminal, the first AND gate input terminal and the second AND gate input terminal are respectively connected to the power management module 10 and the first enable signal terminal 21, and the first AND gate output terminal is connected to the third control signal terminal 33 of the upper bridge driving module 31. Based on the setting mode of the first AND gate logic circuit 51, the electrical signal output by the power management module 10 and the first enable signal terminal 21 can be used as the output electrical signal of the third control signal terminal 33 of the upper bridge driving module 31. And, only when the electrical signals output by the power management module 10 and the first enable signal terminal 21 are both high-level signals, will the high-level signal be output to the third control signal terminal 33 of the upper bridge driving module 31.

[0060] The logic circuit module 50 is also provided with a second AND gate logic circuit 52, the second AND gate logic circuit 52 includes a third AND gate input terminal, a fourth AND gate input terminal and a second AND gate output terminal, the third AND gate input terminal and the fourth AND gate input terminal are respectively connected to the power management module 10 and the first control signal terminal 22, and the second AND gate output terminal is connected to the second enable signal terminal 34 of the upper bridge driver module 31. Based on the setting mode of the second AND gate logic circuit 52, the electrical signal output by the power management module 10 and the first control signal terminal 22 can be used to output the electrical signal to the second enable signal terminal 34 of the upper bridge driver module 31. In addition, only when the electrical signals output by the power management module 10 and the first control signal terminal 22 are both high-level signals, will the high-level signal be output to the second enable signal terminal 34 of the upper bridge driver module 31.

[0061] Furthermore, the first AND gate output terminal is connected to the third control signal terminal 33 of the lower bridge driving module 32. At this time, the third control signal terminal 33 of the lower bridge driving module 32 and the third control signal terminal 33 of the upper bridge driving module 31 receive the same type of electrical signal.

[0062] Furthermore, the logic circuit module 50 also includes a third AND gate logic circuit 53, an OR gate logic circuit 54 and a NOT gate logic circuit 55. The third AND gate logic circuit 53 includes a fifth AND gate input terminal, a sixth AND gate input terminal and a third AND gate output terminal. The fifth AND gate input terminal and the sixth AND gate input terminal are respectively connected to the power management module 10 and the second control signal terminal 23. The first OR gate input terminal of the OR gate logic circuit 54 is connected to the third AND gate output terminal. One end of the NOT gate logic circuit 55 is connected to the power management module 10. The other end of the NOT gate logic circuit 55 is connected to the second OR gate input terminal of the OR gate logic circuit 54. The output terminal of the OR gate logic circuit 54 is connected to the second enable signal terminal 34 of the lower bridge driver module 32.

[0063] It should be understood that the electrical signal output by the power management module 10 is of opposite type before and after passing through the NOT gate logic circuit 55. When a high level signal is input to one of the first OR gate input terminal and the second OR gate input terminal of the OR gate logic circuit 54, its output terminal outputs a high level signal to the second enable signal terminal 34 of the lower bridge driving module 32. For the third AND gate logic circuit 53, only when the electrical signals input to the fifth AND gate input terminal and the sixth AND gate input terminal are both high level signals, the third AND gate output terminal will output a high level signal.

[0064] Based on the above logic circuit configuration, we also provide another implementation method for controlling the IGBT module 40 to enter the ASC state:

[0065] Figure 6 is another diagram illustrating electrical signals of the motor controller 100 of the vehicle.

[0066] Combination Figure 6 , when the electric drive system to which the main control module 20 belongs has a preset safety fault state, and the power supply state of the power module 60 to the power management module 10 is in a preset normal state, and the main control module 20 is in a preset normal working state, the power management module 10, the first enable signal terminal 21, the first control signal terminal 22 and the second control signal terminal 23 respectively output a high level signal, a low level signal, a low level signal and a high level signal. At this time, the third control signal terminal 33 and the second enable signal terminal 34 of the upper bridge driving module 31 both receive a low level signal, and the third control signal terminal 33 and the second enable signal terminal 34 of the lower bridge driving module 32 respectively receive a high level signal and a low level signal, so that neither the upper bridge driving module 31 nor the lower bridge driving module 32 will enter the safe state mode.

[0067] Further, the main control module 20 also includes a first PWM signal terminal 24 and a second PWM signal terminal 25, the upper bridge driving module 31 includes a third PWM signal terminal 35, and the lower bridge driving module 32 includes a fourth PWM signal terminal 36. The first PWM signal terminal 24 is connected to the third PWM signal terminal 35, and the second PWM signal terminal 25 is connected to the fourth PWM signal terminal 36. At this time, the upper bridge driving module 31 is controlled by outputting a PWM signal to the third PWM signal terminal 35 through the first PWM signal terminal 24, and the upper bridge driving module 31 can be put into a safe state mode by inputting a specific PWM signal. Of course, the lower bridge driving module 32 can also be controlled by outputting a PWM signal to the fourth PWM signal terminal 36 through the second PWM signal terminal 25, and the lower bridge driving module 32 can be put into a safe state mode by inputting a specific PWM signal.

[0068] Continue to combine Figure 1 In some specific embodiments, the motor controller further includes a high-voltage auxiliary source module 70, which is connected to the logic circuit module 50 and the drive module 30 respectively, and is connected to a high-voltage power supply 80, which is connected to the vehicle high-voltage power supply 80. Based on this configuration, the voltage output by the high-voltage power supply 80 can be converted by the high-voltage auxiliary source module 70 to obtain a low voltage input to the logic circuit module 50 and the drive module 30.

[0069] Among them, the electric drive system to which the main control module 20 belongs has a preset safety fault state, and when the power supply state of the low-voltage power supply to the power management module 10 is in a preset abnormal state, the low-voltage power supply cannot supply power to the logic circuit module 50 and the drive module 30. At this time, the logic circuit module 50 and the drive module 30 are powered by the high-voltage auxiliary source module 70, so that the logic circuit module 50 and the drive module 30 work normally. However, since the main control module 20 is not powered normally, the signals output by each end thereof are low-level signals.

[0070] At this time, the power management module 10, the first enable signal terminal 21, the first control signal terminal 22 and the second control signal terminal 23 all output low-level signals, and the lower bridge drive module 32 enters the safe state mode. The specific electrical signal form can be seen in Figure 5 And related descriptions of the above embodiments.

[0071] A second aspect of the present application provides a control method for a motor controller of a vehicle, and the control method is based on the motor controller 10 of the vehicle in any of the above embodiments. Figure 7 is a flow chart of an embodiment of a control method of a motor controller of a vehicle provided by the present application, combined with Figure 7 , the method comprises the following steps:

[0072] S11: Detecting the current working state of the electric drive system to which the main control module belongs; wherein the working state of the electric drive system includes a preset safety fault state and a preset normal state.

[0073] Among them, the preset safety fault state and the preset normal state are linked to the current working parameters of the electric drive system, and the current working state of the electric drive system can be determined by detecting the current working parameters of the electric drive system.

[0074] S12: When it is detected that the electric drive system has a preset safety fault state, electrical signals are respectively input to the logic circuit module through the power management module, the first enable signal terminal, the first control signal terminal and the second control signal terminal to enable the drive module to enter a safe state mode.

[0075] When it is detected that the electric drive system has a preset safety fault state, the power management module and the main control module jointly output electrical signals to control the drive module, thereby making the drive module enter the safe state mode. Even if the main control module fails, the IGBT module can enter the ASC state with the assistance of the electrical signal output by the power management module, thereby achieving good protection for the motor system.

[0076] In some specific embodiments, when it is detected that the electric drive system has a preset safety fault state, the steps of inputting electrical signals to the logic circuit module through the power management module, the first enable signal terminal, the first control signal terminal, and the second control signal terminal respectively so as to make the drive module enter the safety state mode include:

[0077] If the electric drive system to which the main control module belongs has a preset safety fault state, and the power supply state of the power module to the power management module is in a preset normal state, and the main control module is in a preset abnormal working state, the power management module outputs a low-level signal to make the drive module enter the safe state mode, so as to control the IGBT module to enter the ASC state. At this time, when the main control module is in the preset abnormal working state, the drive module can be made to enter the safe state mode only by the low-level signal output by the power management module.

[0078] Of course, the above control method can be based on the motor controller of the vehicle in any of the above embodiments according to actual needs.

[0079] In summary, the motor controller and control method of the vehicle provided by the present application include: a power management module, connected to a low-voltage power supply; a main control module, connected to the power management module, the main control module is provided with a first enable signal terminal, a first control signal terminal and a second control signal terminal; a drive module and an IGBT module, the drive module is respectively connected to the main control module and the IGBT module, and the drive module drives the IGBT module under the control of the main control module; a logic circuit module, respectively connected to the power management module and the drive module, and the logic circuit module is also respectively connected to the first enable signal terminal, the first control signal terminal and the second control signal terminal; wherein, when the electric drive system to which the main control module belongs has a preset safety fault state, the power management module, the first enable signal terminal, the first control signal terminal and the second control signal terminal respectively input electrical signals to the logic circuit module, so that the drive module enters a safe state mode, so as to control the IGBT module to enter an ASC state through the drive module. Therefore, through the setting of the logic circuit, the main control module and the power management module jointly output a specific electrical signal to enable the controller to enter the ASC state, and even if the main control module fails, it can enter the ASC state, thereby achieving good protection for the motor system.

[0080] The above content is only a preferred exemplary embodiment of the present application and is not intended to limit the implementation scheme of the present application. A person skilled in the art can easily make corresponding changes or modifications based on the main concept and spirit of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection required by the claims.

Claims

1. A motor controller for a vehicle, characterized in that: include: A power management module connected to a low voltage power supply; A main control module, connected to the power management module, the main control module is provided with a first enable signal terminal, a first control signal terminal and a second control signal terminal; A driving module and an IGBT module, wherein the driving module is connected to the main control module and the IGBT module respectively, and the driving module drives the IGBT module under the control of the main control module; a logic circuit module, connected to the power management module and the driving module respectively, and the logic circuit module is also connected to the first enable signal terminal, the first control signal terminal and the second control signal terminal respectively; Among them, when the electric drive system to which the main control module belongs has a preset safety fault state, the power management module, the first enable signal end, the first control signal end and the second control signal end respectively input electrical signals to the logic circuit module to enable the drive module to enter a safe state mode, so as to control the IGBT module to enter an ASC state through the drive module.

2. The motor controller according to claim 1, characterized in that: When the electric drive system to which the main control module belongs has a preset safety fault state, and the power supply state of the power supply module to the power management module is in a preset normal state, and the main control module is in a preset abnormal working state, the power management module outputs a low-level signal to enable the drive module to enter a safe state mode, so as to control the IGBT module to enter an ASC state.

3. The motor controller according to claim 1, characterized in that: The electric drive system to which the main control module belongs has a preset safety fault state, and the power supply state of the power supply module to the power management module is in a preset normal state, and the main control module is in a preset normal working state; The power management module, the first enable signal terminal, the first control signal terminal and the second control signal terminal respectively output a high level signal, a low level signal, a low level signal and a high level signal, or respectively output a high level signal, a low level signal, a high level signal and a low level signal, so that the driving module enters a safe state mode to control the IGBT module to enter an ASC state.

4. The motor controller according to claim 2, characterized in that: The driving module includes an upper bridge driving module and a lower bridge driving module, and both the upper bridge driving module and the lower bridge driving module include a third control signal terminal and a second enable signal terminal; Among them, the logic circuit module inputs a low level signal to the third control signal terminal and the second enable signal terminal of the upper bridge driving module based on the low level signal output by the power management module, the electrical signals output by the first enable signal terminal, the first control signal terminal and the second control signal terminal, and inputs a low level signal and a high level signal to the third control signal terminal and the second enable signal terminal of the lower bridge driving module, so that the lower bridge driving module enters a safe state mode.

5. The motor controller according to claim 4, characterized in that: The logic circuit module inputs a low level signal to the third control signal terminal of the upper bridge driving module and the third control signal terminal of the lower bridge driving module based on the electrical signal output by the first enable signal terminal and the low level signal output by the power management module; The logic circuit module inputs a low level signal to the second enable signal terminal of the upper bridge driving module based on the electrical signal output by the first control signal terminal and the low level signal output by the power management module; The logic circuit module inputs a high level signal to the second enable signal terminal of the lower bridge driving module based on the electrical signal output by the second control signal terminal and the low level signal output by the power management module.

6. The motor controller according to claim 5, characterized in that: The logic circuit module is provided with a first AND gate logic circuit, the first AND gate logic circuit includes a first AND gate input terminal, a second AND gate input terminal and a first AND gate output terminal, the first AND gate input terminal and the second AND gate input terminal are respectively connected to the power management module and the first enable signal terminal, and the first AND gate output terminal is connected to the third control signal terminal of the upper bridge driving module; The logic circuit module is provided with a second AND gate logic circuit, which includes a third AND gate input terminal, a fourth AND gate input terminal and a second AND gate output terminal, the third AND gate input terminal and the fourth AND gate input terminal are respectively connected to the power management module and the first control signal terminal, and the second AND gate output terminal is connected to the second enable signal terminal of the upper bridge drive module.

7. The motor controller according to claim 5, characterized in that: The first AND gate output terminal is connected to the third control signal terminal of the lower bridge driving module; The logic circuit module also includes a third AND gate logic circuit, an OR gate logic circuit and a NOT gate logic circuit. The third AND gate logic circuit includes a fifth AND gate input terminal, a sixth AND gate input terminal and a third AND gate output terminal. The fifth AND gate input terminal and the sixth AND gate input terminal are respectively connected to the power management module and the second control signal terminal, the first OR gate input terminal of the OR gate logic circuit is connected to the third AND gate output terminal, one end of the NOT gate logic circuit is connected to the power management module, the other end of the NOT gate logic circuit is connected to the second OR gate input terminal of the OR gate logic circuit, and the output terminal of the OR gate logic circuit is connected to the second enable signal terminal of the lower bridge driver module.

8. The motor controller according to claim 1, characterized in that: The motor controller further comprises a high-voltage auxiliary source module, wherein the high-voltage auxiliary source module is respectively connected to the logic circuit module and the driving module, and the high-voltage auxiliary source module is connected to a high-voltage power supply; Among them, the electric drive system to which the main control module belongs has a preset safety fault state, and when the power supply state of the low-voltage power supply to the power management module is in a preset abnormal state, the high-voltage auxiliary source module supplies power to the logic circuit module and the drive module, and the power management module, the first enable signal terminal, the first control signal terminal and the second control signal terminal all output low-level signals.

9. A control method for a motor controller of a vehicle, characterized in that: The control method is based on the motor controller of the vehicle according to any one of claims 1 to 8, and the control method comprises: Detecting the current working state of the electric drive system to which the main control module belongs; wherein the working state of the electric drive system includes a preset safety fault state and a preset normal state; When it is detected that the electric drive system has a preset safety fault state, electrical signals are respectively input to the logic circuit module through the power management module, the first enable signal terminal, the first control signal terminal and the second control signal terminal to enable the drive module to enter a safe state mode.

10. The control method according to claim 9, characterized in that: When it is detected that the electric drive system has a preset safety fault state, the steps of inputting electrical signals to the logic circuit module through the power management module, the first enable signal terminal, the first control signal terminal, and the second control signal terminal respectively so as to make the drive module enter a safe state mode include: The electric drive system to which the main control module belongs has a preset safety fault state, and the power supply state of the power supply module to the power management module is in a preset normal state, and the main control module is in a preset abnormal working state, then a low-level signal is output through the power management module to enable the drive module to enter a safe state mode, so as to control the IGBT module to enter an ASC state.

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