A method and device for processing electric drive inverter bridge power device, a drive control system and a new energy vehicle

Abstract

The present invention discloses a method, device, drive control system and new energy vehicle for processing an electric drive inverter bridge power device. The method comprises: collecting the real-time power supply voltage of the drive control system, directly comparing the real-time power supply voltage, and determining a first drive control signal; and comparing the signal range of the real-time power supply voltage to determine a second drive control signal; and verifying the first drive control signal and / or the second drive control signal according to the current drive signal of the electric drive inverter bridge power device in the protection circuit, generating a corresponding drive switching signal of the electric drive inverter bridge power device, and executing the drive switching signal of the electric drive inverter bridge power device. The method, device, drive control system and new energy vehicle for processing an electric drive inverter bridge power device provided by the embodiments of the present invention improve the processing effect of the electric drive inverter bridge power device.

Description

Technical Field

[0001] The present invention relates to the field of power electronics technology, and in particular to a method and device for processing an electric drive inverter bridge power device, a drive control system and a new energy vehicle. Background Art

[0002] The electric drive inverter bridge is one of the core components in the electric drive system of electric vehicles, responsible for converting the DC power provided by the power battery into the AC power required by the drive motor. This conversion process is achieved through a series of power devices.

[0003] Since the electric drive inverter bridge power device may enter a severe heating working area due to a drop in the driving voltage, there is a risk of thermal failure. The solution of the prior art is to control the shutdown of the driving voltage of the electric drive inverter bridge power device through analog-to-digital conversion processing and comparator processing in sequence to achieve overheating protection of the electric drive inverter bridge power device. However, due to the complex signal link of this method, it is impossible to quickly respond to the voltage drop of the electric drive inverter bridge power device, resulting in poor processing effect on the electric drive inverter bridge power device.

[0004] It can be seen that how to ensure the processing effect of the electric drive inverter bridge power devices has become a technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] The present invention provides a method and device for processing an electric drive inverter bridge power device, a drive control system and a new energy vehicle, so as to solve the technical problem that the processing effect of the electric drive inverter bridge power device in the prior art is poor.

[0006] In order to solve the above technical problems, the first aspect of the present application provides a method for processing an electric drive inverter bridge power device.

[0007] Collecting the real-time power supply voltage of the drive control system, performing direct comparison processing on the real-time power supply voltage to determine a first drive control signal; and performing signal range comparison on the real-time power supply voltage to determine a second drive control signal;

[0008] According to the current drive signal of the electric drive inverter bridge power device in the protection circuit, the first drive control signal and / or the second drive control signal are respectively verified to generate a corresponding drive switching signal of the electric drive inverter bridge power device;

[0009] Execute the drive switching signal of the electric drive inverter bridge power device.

[0010] As one preferred solution, the direct comparison processing of the real-time power supply voltage to determine the first drive control signal includes:

[0011] The real-time power supply voltage and the preset threshold are compared and analyzed. When the real-time power supply voltage is less than or equal to the preset threshold, a first drive control signal with a first shutdown state attribute is determined; otherwise, a first drive control signal with a second maintain-on state attribute is determined.

[0012] As one preferred solution, the step of comparing the signal range of the real-time power supply voltage to determine the second drive control signal includes:

[0013] Performing analog-to-digital conversion on the supply voltage to obtain a digital voltage signal;

[0014] The digital voltage signal is compared and analyzed with a preset normal range. When the digital voltage signal is within the preset normal range, a second drive control signal having a third recovery-on state attribute is determined; otherwise, a second drive control signal having a fourth shutdown state attribute is determined.

[0015] As one of the preferred solutions, the first drive control signal and / or the second drive control signal are respectively verified according to the current drive signal of the electric drive inverter bridge power device in the protection circuit to generate a corresponding drive switching signal of the electric drive inverter bridge power device, including:

[0016] If it is detected that the state attribute of the current driving signal is on, when the first driving control signal is the first off state attribute, or the second driving control signal is the fourth off state attribute, the driving switching signal is generated to switch the state attribute of the current driving signal to off.

[0017] As one of the preferred solutions, the first drive control signal and / or the second drive control signal are respectively verified according to the current drive signal of the electric drive inverter bridge power device in the protection circuit to generate a corresponding drive switching signal of the electric drive inverter bridge power device, and further includes:

[0018] If it is detected that the state attribute of the current driving signal is off, then when the second driving control signal is the third restoration-on state attribute, the driving switching signal is generated to switch the state attribute of the current driving signal to on.

[0019] As one of the preferred solutions, a driving switching signal of the electric drive inverter bridge power device is executed before the electric drive inverter bridge power device enters the linear region to work.

[0020] The second aspect of the present application provides an electric drive inverter bridge power device processing device, which is applied to a protection circuit of a drive control system of a new energy vehicle, including:

[0021] A dual fast comparison module is used to collect the real-time power supply voltage of the drive control system, perform direct comparison processing on the real-time power supply voltage to determine the first drive control signal; and perform signal range comparison on the real-time power supply voltage to determine the second drive control signal;

[0022] A drive control judgment module, used to verify the first drive control signal and / or the second drive control signal according to the current drive signal of the electric drive inverter bridge power device in the protection circuit, and generate a corresponding drive switching signal of the electric drive inverter bridge power device;

[0023] The regulation and protection module is used to execute the drive switching signal of the electric drive inverter bridge power device.

[0024] The third aspect of the present application provides a drive control system for a new energy vehicle, comprising:

[0025] Low voltage power supply, high voltage power supply, flyback transformer, protection circuit and electric drive inverter bridge power devices;

[0026] The output end of the low-voltage power supply is connected to the flyback transformer, the output end of the flyback transformer is connected to the protection circuit, and the output end of the protection circuit and the output end of the high-voltage power supply are both connected to the electric drive inverter bridge power device.

[0027] A fourth aspect of the present application provides a new energy vehicle, including:

[0028] A processor; and a memory having executable codes stored thereon, which, when executed by the processor, cause the processor to execute the method as described above.

[0029] A fifth aspect of the present application provides a computer-readable storage medium, which stores a computer program. When a device where the computer-readable storage medium is located executes the computer program, the method described above is implemented.

[0030] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0031] (1) collecting the real-time power supply voltage of the drive control system, performing direct comparison processing on the real-time power supply voltage, and determining a first drive control signal; and performing signal range comparison on the real-time power supply voltage, and determining a second drive control signal;

[0032] (2) According to the current driving signal of the electric drive inverter bridge power device in the protection circuit, the first driving control signal and / or the second driving control signal are respectively checked to generate the corresponding driving switching signal of the electric drive inverter bridge power device. The power supply voltage of the driving integrated circuit is directly compared and processed in one way, so that the driving output can be quickly turned off to avoid the electric drive inverter bridge power device working in the linear region and causing instantaneous heating of the device. The signal range is compared in another way to identify the specific voltage value. When the value is within the normal range, the driving output can be quickly restored to avoid false triggering of the burr waveform and timely drive shutdown protection for the real voltage drop;

[0033] (3) Execute the drive switching signal of the electric drive inverter bridge power device to quickly respond to the voltage drop of the electric drive inverter bridge power device, and quickly restore the drive output after the voltage re-enters the normal range, which not only improves the accuracy of voltage drop recognition, but also improves the real-time response to the voltage drop of the electric drive inverter bridge power device to avoid false triggering. At the same time, it also has an automatic recovery function, which improves the processing effect of the electric drive inverter bridge power device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a flow chart of a method for processing an electric drive inverter bridge power device in one embodiment of the present invention;

[0035] Figure 2 It is a structural block diagram of an electric drive inverter bridge power device processing device in one embodiment of the present invention;

[0036] Figure 3 It is a schematic diagram of the structure of a drive control system for a new energy vehicle in one embodiment of the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of this application, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0039] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used herein are only for illustrative purposes, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In the description of this application, it should be noted that, unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0041] An embodiment of the present invention provides a method for processing an electric drive inverter bridge power device, the method comprising steps S1-S3. For details, see Figure 1 , Figure 1 The flowchart shows a method for processing an electric drive inverter bridge power device in one embodiment of the present invention.

[0042] Step S1: collecting the real-time power supply voltage of the drive control system, performing direct comparison processing on the real-time power supply voltage to determine a first drive control signal; and performing signal range comparison on the real-time power supply voltage to determine a second drive control signal.

[0043] In this step, the real-time power supply voltage is directly compared and processed to determine the first drive control signal, including: comparing and analyzing the real-time power supply voltage and a preset threshold value, when the real-time power supply voltage is less than or equal to the preset threshold value, determining a first drive control signal with a first shutdown state attribute, otherwise, determining a first drive control signal with a second maintain-on state attribute.

[0044] In this step, the signal range of the real-time power supply voltage is compared to determine the second drive control signal, including: performing analog-to-digital conversion on the power supply voltage to obtain a digital voltage signal; comparing and analyzing the digital voltage signal with a preset normal range, when the digital voltage signal is within the preset normal range, determining a second drive control signal with a third recovery-on state attribute, otherwise, determining a second drive control signal with a fourth shutdown state attribute.

[0045] Step S2: According to the current driving signal of the electric drive inverter bridge power device in the protection circuit, the first driving control signal and / or the second driving control signal are respectively verified to generate a corresponding driving switching signal of the electric drive inverter bridge power device.

[0046] In this step, according to the current drive signal of the electric drive inverter bridge power device in the protection circuit, the first drive control signal and / or the second drive control signal are respectively verified to generate a corresponding drive switching signal of the electric drive inverter bridge power device, including:

[0047] If it is detected that the state attribute of the current driving signal is on, when the first driving control signal is the first off state attribute, or the second driving control signal is the fourth off state attribute, a driving switching signal is generated to switch the state attribute of the current driving signal to off;

[0048] If it is detected that the state attribute of the current driving signal is off, then when the second driving control signal is the third restoration-on state attribute, a driving switching signal is generated to switch the state attribute of the current driving signal to on.

[0049] It should be noted that the insulated gate bipolar transistor is a power semiconductor switching device that combines the advantages of junction field effect transistors and bipolar switching devices. The insulated gate bipolar transistor has the characteristics of low switching loss, high switching speed, low on-state voltage drop, high saturation current and excellent high-temperature working ability. It is widely used in motor control, power conversion, new energy power generation and other fields. The application of insulated gate bipolar transistors to electric drive inverter bridges can quickly and accurately control the direction and frequency of current, efficiently convert direct current into alternating current, and provide stable power for the drive motor of electric vehicles.

[0050] As an embodiment of the present application, the current driving signal of the electric drive inverter bridge power device is a 6-channel PWM driving square wave, and the electric drive inverter bridge power device is an insulated gate bipolar transistor.

[0051] Step S3: executing a drive switching signal of the electric drive inverter bridge power device before the electric drive inverter bridge power device enters the linear region to work.

[0052] It should be noted that the present application cuts off the drive signal of the electric drive inverter bridge power device before the electric drive inverter bridge power device enters the linear region of operation through the state attributes of any one of the first drive control signal and the second drive control signal, so as to respond quickly to the voltage drop and reduce the risk of thermal failure of the electric drive inverter bridge power device.

[0053] At the same time, after the voltage enters the normal range, the output of the drive signal of the electric drive inverter bridge power device is quickly restored by changing the state attribute of the second drive control signal, thereby improving the processing effect of the electric drive inverter bridge power device.

[0054] Compared with the prior art, the control method of the electric drive inverter bridge power device protection system provided by the embodiment of the present invention has the following beneficial effects:

[0055] (1) collecting the real-time power supply voltage of the drive control system, performing direct comparison processing on the real-time power supply voltage, and determining a first drive control signal; and performing signal range comparison on the real-time power supply voltage, and determining a second drive control signal;

[0056] (2) According to the current driving signal of the electric drive inverter bridge power device in the protection circuit, the first driving control signal and / or the second driving control signal are respectively checked to generate the corresponding driving switching signal of the electric drive inverter bridge power device. The power supply voltage of the driving integrated circuit is directly compared and processed in one way, so that the driving output can be quickly turned off to avoid the electric drive inverter bridge power device working in the linear region and causing instantaneous heating of the device. The signal range is compared in another way to identify the specific voltage value. When the value is within the normal range, the driving output can be quickly restored to avoid false triggering of the burr waveform and timely drive shutdown protection for the real voltage drop;

[0057] (3) Execute the drive switching signal of the electric drive inverter bridge power device to quickly respond to the voltage drop of the electric drive inverter bridge power device, and quickly restore the drive output after the voltage re-enters the normal range, which not only improves the accuracy of voltage drop recognition, but also improves the real-time response to the voltage drop of the electric drive inverter bridge power device to avoid false triggering. At the same time, it also has an automatic recovery function, which improves the processing effect of the electric drive inverter bridge power device.

[0058] Another embodiment of the present invention provides an electric drive inverter bridge power device processing device, which is applied to the protection circuit of the drive control system of a new energy vehicle. For details, please refer to Figure 2 , Figure 2 Shown is a structural block diagram of an electric drive inverter bridge power device processing device in one embodiment of the present invention.

[0059] Specifically, an electric drive inverter bridge power device processing device provided by an embodiment of the present invention includes:

[0060] The dual fast comparison module 11 is used to collect the real-time power supply voltage of the drive control system, perform direct comparison processing on the real-time power supply voltage, and determine the first drive control signal; and perform signal range comparison on the real-time power supply voltage to determine the second drive control signal;

[0061] A drive control judgment module 12 is used to verify the first drive control signal and / or the second drive control signal according to the current drive signal of the electric drive inverter bridge power device in the protection circuit, and generate a corresponding drive switching signal of the electric drive inverter bridge power device;

[0062] The regulation and protection module 13 is used to execute the drive switching signal of the electric drive inverter bridge power device.

[0063] Another embodiment of the present invention provides a driving control system for a new energy vehicle. For details, see Figure 3 , Figure 3 Shown is a schematic structural diagram of a drive control system for a new energy vehicle in one embodiment of the present invention.

[0064] Specifically, an embodiment of the present invention provides a drive control system for a new energy vehicle, including a low-voltage power supply, a high-voltage power supply, a flyback transformer, a protection circuit and an electric drive inverter bridge power device; the output end of the low-voltage power supply is connected to the flyback transformer, the output end of the flyback transformer is connected to the protection circuit, and the output end of the protection circuit and the output end of the high-voltage power supply are both connected to the electric drive inverter bridge power device.

[0065] Another embodiment of the present invention provides a new energy vehicle, comprising:

[0066] A processor; and a memory having executable codes stored thereon, which, when executed by the processor, cause the processor to execute the method as described above.

[0067] Still another embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the method described above.

[0068] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A method for processing an electric drive inverter bridge power device, characterized in that: Applied in the protection circuit of the drive control system of new energy vehicles, including: Collecting the real-time power supply voltage of the drive control system, performing direct comparison processing on the real-time power supply voltage to determine a first drive control signal; and performing signal range comparison on the real-time power supply voltage to determine a second drive control signal; According to the current drive signal of the electric drive inverter bridge power device in the protection circuit, the first drive control signal and / or the second drive control signal are respectively verified to generate a corresponding drive switching signal of the electric drive inverter bridge power device; Execute the drive switching signal of the electric drive inverter bridge power device.

2. The method for processing an electric drive inverter bridge power device according to claim 1, characterized in that: The directly comparing the real-time power supply voltage to determine the first drive control signal includes: The real-time power supply voltage and the preset threshold are compared and analyzed. When the real-time power supply voltage is less than or equal to the preset threshold, a first drive control signal with a first shutdown state attribute is determined; otherwise, a first drive control signal with a second maintain-on state attribute is determined.

3. The method for processing an electric drive inverter bridge power device according to claim 1, characterized in that: The comparing the signal range of the real-time power supply voltage to determine the second drive control signal includes: Performing analog-to-digital conversion on the supply voltage to obtain a digital voltage signal; The digital voltage signal is compared and analyzed with a preset normal range. When the digital voltage signal is within the preset normal range, a second drive control signal having a third recovery-on state attribute is determined; otherwise, a second drive control signal having a fourth shutdown state attribute is determined.

4. A method for processing an electric drive inverter bridge power device according to claim 2 or 3, characterized in that: The first drive control signal and / or the second drive control signal are respectively verified according to the current drive signal of the electric drive inverter bridge power device in the protection circuit to generate a corresponding drive switching signal of the electric drive inverter bridge power device, including: If it is detected that the state attribute of the current driving signal is on, when the first driving control signal is the first off state attribute, or the second driving control signal is the fourth off state attribute, the driving switching signal is generated to switch the state attribute of the current driving signal to off.

5. A method for processing an electric drive inverter bridge power device according to claim 2 or 3, characterized in that: The first drive control signal and / or the second drive control signal are respectively verified according to the current drive signal of the electric drive inverter bridge power device in the protection circuit to generate a corresponding drive switching signal of the electric drive inverter bridge power device, and further includes: If it is detected that the state attribute of the current driving signal is off, then when the second driving control signal is the third restoration-on state attribute, the driving switching signal is generated to switch the state attribute of the current driving signal to on.

6. The method for processing an electric drive inverter bridge power device according to claim 1, characterized in that: The driving switching signal of the electric drive inverter bridge power device is executed before the electric drive inverter bridge power device enters the linear region to work.

7. An electric drive inverter bridge power device processing device, characterized in that: Applied in the protection circuit of the drive control system of new energy vehicles, including: A dual fast comparison module is used to collect the real-time power supply voltage of the drive control system, perform direct comparison processing on the real-time power supply voltage to determine the first drive control signal; and perform signal range comparison on the real-time power supply voltage to determine the second drive control signal; A drive control judgment module, used to verify the first drive control signal and / or the second drive control signal according to the current drive signal of the electric drive inverter bridge power device in the protection circuit, and generate a corresponding drive switching signal of the electric drive inverter bridge power device; The regulation and protection module is used to execute the drive switching signal of the electric drive inverter bridge power device.

8. A driving control system for a new energy vehicle, characterized in that: Including low voltage power supply, high voltage power supply, flyback transformer, protection circuit and electric drive inverter bridge power device; The output end of the low-voltage power supply is connected to the flyback transformer, the output end of the flyback transformer is connected to the protection circuit, and the output end of the protection circuit and the output end of the high-voltage power supply are both connected to the electric drive inverter bridge power device.

9. A new energy vehicle, characterized in that: include: processor; as well as A memory having executable codes stored thereon, which, when executed by the processor, causes the processor to execute the method according to any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein when the device where the computer-readable storage medium is located executes the computer program, the method according to any one of claims 1 to 6 is implemented.

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