Drive control circuit, drive control device, and vehicle
By amplifying and reducing the PWM signal through hardware, amplified and reduced signals are generated, which solves the problem of high MCU resource cost in carbon mixing control and achieves simplified control and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-03-24
AI Technical Summary
In carbon blending control schemes, existing technologies require the implementation of different control strategies through MCU software, resulting in high MCU resource requirements and high costs.
The hardware-based drive control circuit amplifies and reduces the PWM signal through the first and second adjustment modules, generating amplified and reduced signals respectively. The signal conduction is controlled by the gating module to achieve different envelope effects for the SiC module and the IGBT module.
This reduces the pin requirements for the controller, simplifies the control method, and lowers the cost of carbon mixing control.
Smart Images
Figure CN224037259U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to control circuit technical field, concretely relates to drive control circuit, drive control device and vehicle. BACKGROUND
[0002] In order to control electric vehicle efficiently and at low cost, generally adopt mixed carbon scheme. Mixed carbon scheme refers to the drive module of electric vehicle motor has SiC MOSFET (silicon carbide - field effect tube, is called SiC for short), also has IGBT (insulated gate bipolar transistor), according to the different actual demand of output torque, need to adopt different control strategy.
[0003] In the mixed carbon control scene, the waveform for controlling SiC module and IGBT module respectively needs to be output as required, and at present, it is generally realized by software in MCU (microcontroller), which generally needs more MCU resources, requires higher MCU, and has higher cost. UTILITY MODEL CONTENTS
[0004] Therefore, the utility model provides a kind of drive control circuit, drive control device and vehicle to solve the problem of high cost of mixed carbon control.
[0005] In the first aspect, the utility model provides a kind of drive control circuit, comprising: first adjustment module, second adjustment module and gating module;
[0006] The input end of the first adjustment module and the second adjustment module is used to access PWM signal;The output end of the first adjustment module is connected with the first input end of the gating module, and the output end of the second adjustment module is connected with the second input end of the gating module;
[0007] The first adjustment module is configured to expand the width of the PWM signal, generate and output expansion signal;The second adjustment module is configured to reduce the width of the PWM signal, generate and output reduction signal;
[0008] The first output end and the third output end of the gating module are used to be connected with SiC drive controller, and the second output end and the fourth output end of the gating module are used to be connected with IGBT drive controller;The gating module is configured as: when the first input end of the gating module and the first output end are turned on, and the second input end of the gating module and the fourth output end are turned on, or when the first input end of the gating module and the second output end are turned on, and the second input end of the gating module and the third output end are turned on.
[0009] In some optional embodiments, the first adjustment module is configured to delay the falling edge of the PWM signal, generate and output the expansion signal after the falling edge is delayed.
[0010] The second adjusting module is configured to delay the rising edge of the PWM signal, generate and output a reduced signal with delayed rising edge.
[0011] In some optional embodiments, the first adjusting module comprises a first delay circuit and a first comparator; and the second adjusting module comprises a second delay circuit and a second comparator.
[0012] The input end of the first delay circuit and the input end of the second delay circuit are both configured to access the PWM signal.
[0013] The output end of the first delay circuit is connected with the input end of the first comparator, and the output end of the second delay circuit is connected with the input end of the second comparator.
[0014] The output end of the first comparator is connected with the first input end of the gating module, and the output end of the second comparator is connected with the second input end of the gating module.
[0015] The first delay circuit is configured to delay the falling edge of the PWM signal, and the second delay circuit is configured to delay the rising edge of the PWM signal.
[0016] In some optional embodiments, the first delay circuit comprises a first resistor, a first capacitor and a first diode; and the second delay circuit comprises a second resistor, a second capacitor and a second diode.
[0017] The first end of the first resistor is configured to access the PWM signal, and the second end of the first resistor is grounded through the first capacitor; the anode of the first diode is connected with the first end of the first resistor, and the cathode of the first diode is connected with the second end of the first resistor; and the second end of the first resistor is further connected with the input end of the first comparator.
[0018] The second end of the second resistor is configured to access the PWM signal, and the second end of the second resistor is grounded through the second capacitor; the cathode of the second diode is connected with the second end of the second resistor, and the anode of the second diode is connected with the second end of the second resistor; and the second end of the second resistor is further connected with the input end of the second comparator.
[0019] In some optional embodiments, the driving control circuit further comprises a first OR gate and a second OR gate.
[0020] The two input ends of the first OR gate are respectively connected with the first output end and the third output end of the gating module, and the output end of the first OR gate is configured to be connected with the SiC driving controller.
[0021] Two input ends of the second OR gate are connected with a second output end and a fourth output end of the gating module respectively, and an output end of the second OR gate is used for being connected with an IGBT drive controller.
[0022] In some optional embodiments, the gating module comprises: a first gating circuit and a second gating circuit; the first gating circuit comprises a first gating unit and a second gating unit; the second gating circuit comprises a third gating unit and a fourth gating unit;
[0023] An input end of the first gating unit is connected with an output end of the first adjusting module, and an output end of the first gating unit is used for being connected with a SiC drive controller;
[0024] An input end of the second gating unit is connected with an output end of the second adjusting module, and an output end of the second gating unit is used for being connected with an IGBT drive controller;
[0025] An input end of the third gating unit is connected with an output end of the second adjusting module, and an output end of the third gating unit is used for being connected with a SiC drive controller;
[0026] An input end of the fourth gating unit is connected with an output end of the first adjusting module, and an output end of the fourth gating unit is used for being connected with an IGBT drive controller;
[0027] The first gating circuit is used for controlling the first gating unit and the second gating unit to be synchronously turned on or turned off, and the second gating circuit is used for controlling the third gating unit and the fourth gating unit to be synchronously turned on or turned off.
[0028] In some optional embodiments, the gating module further comprises: an inverter and a third delay circuit;
[0029] A gating signal for controlling the gating module is accessed to an enable end of one of the first gating circuit and the second gating circuit, and an enable end of the other of the first gating circuit and the second gating circuit is accessed through the inverter;
[0030] The third delay circuit is arranged at the enable end of the first gating circuit or the second gating circuit, and is used for delaying the gating signal accessed to the first gating circuit or the second gating circuit.
[0031] In a second aspect, the utility model provides a kind of drive control device, comprising: controller, SiC drive controller, IGBT drive controller and the drive control circuit of the first aspect or any of its corresponding embodiments described above;
[0032] The first signal end of the controller is connected with the input end of the drive control circuit, and is used for outputting a PWM signal.
[0033] The two output ends of the drive control circuit are connected with the SiC drive controller and the IGBT drive controller respectively.
[0034] In some optional embodiments, the second signal end of the controller is connected with the gating module of the drive control circuit, and is used for outputting a gating signal.
[0035] In a third aspect, the utility model provides a kind of vehicle, comprising: the drive control circuit of the first aspect or any implementation thereof, or the drive control device of the second aspect or any implementation thereof.
[0036] In the embodiment, the first adjusting module and the second adjusting module are used to respectively expand and reduce the original PWM signal, to generate corresponding expansion signal and reduction signal, and the expansion signal can completely envelope the reduction signal; by controlling the gating condition of the gating module, it can be adjusted to output which one of the expansion signal and the reduction signal to the SiC drive controller and the IGBT drive controller, so as to realize different envelope effects such as SiC wrapping IGBT or IGBT wrapping SiC. The drive control circuit expands one PWM signal into two adjustable signals in a hardware manner, which not only has a simple implementation, but also does not require the controller to generate multiple PWM signals, which can greatly reduce the pin requirements of the controller and is beneficial to reducing the cost of mixed carbon control. BRIEF DESCRIPTION OF DRAWINGS
[0037] In order to more clearly illustrate the technical solutions in the specific embodiments or related technologies of the utility model, the following will briefly introduce the drawings needed to be used in the specific embodiments or related technology description. Obviously, the drawings described below are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0038] Figure 1 is a schematic diagram of a traditional motor control strategy;
[0039] Figure 2 is a structural schematic diagram of a drive control circuit according to an embodiment of the utility model;
[0040] Figure 3 is an effect schematic diagram of a gating module control waveform according to an embodiment of the utility model;
[0041] Figure 4 is another structural schematic diagram of a drive control circuit according to an embodiment of the utility model;
[0042] Figure 5 is a kind of effect schematic diagram according to the embodiment of the utility model to the PWM signal rising edge and falling edge is delayed;
[0043] Figure 6 is a kind of structure schematic diagram of delay circuit according to the embodiment of the utility model;
[0044] Figure 7 is another kind of structure schematic diagram of drive control circuit according to the embodiment of the utility model;
[0045] Figure 8 is again a kind of structure schematic diagram of drive control circuit according to the embodiment of the utility model.
[0046] Mark explanation:
[0047] 10, first adjustment module;20, second adjustment module;30, gating module;40, first or gate;50, second or gate;101, first delay circuit;102, first comparator;201, second delay circuit;202 second comparator;301, first gating circuit;302, second gating circuit;303, inverter;304, third delay circuit;100, controller;200, SiC drive controller;300, IGBT drive controller;400, SiC module;500, IGBT module;600, motor;R1, first resistance;C1, first capacitor;D1, first diode;R2, second resistance;C2, second capacitor;D2, second diode. Specific implementation
[0048] To make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model, apparently, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the skilled in the art without making creative labor are within the scope of the utility model protection.
[0049] In the description of the utility model, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless there is a clear specific limitation.
[0050] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect, can be mechanical connection, also can be electrical connection, can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication. For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned terms in the utility model according to specific circumstances.
[0051] In addition, in order to better illustrate the utility model, a large number of specific details are given in the specific embodiments below. Those skilled in the art should understand that the utility model can also be implemented without certain specific details. In some examples, methods, means and elements well known to those skilled in the art are not described in detail in order to highlight the main idea of the utility model.
[0052] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.
[0053] The motor of the conventional electric vehicle is generally controlled by an IGBT (Insulated Gate Bipolar Transistor) module. However, with the development of intelligent driving of electric vehicles, the increasing functions and power-consuming devices, it is crucial to improve the control efficiency of the motor and thus the endurance of the electric vehicle.
[0054] In recent years, SiC MOSFET (Silicon Carbide - Field Effect Transistor, abbreviated as SiC) has been gradually applied in electric vehicles. SiC is a wide-bandgap semiconductor device with high efficiency, high temperature, high voltage and high frequency advantages, so it can achieve higher efficiency, lower loss, higher temperature and pressure tolerance. However, it is relatively expensive, usually 3-4 times the cost of IGBT.
[0055] The conventional motor control strategy can be as shown in Figure 1 The main motor control is realized by a single IGBT module or SIC module, which only needs to meet the single characteristic requirement. However, if only IGBT modules are used for control, the efficiency cannot be improved, and if only SIC modules are used for control, the cost is 3-4 times the cost of IGBT.
[0056] Therefore, in order to achieve the optimal solution of cost and efficiency, the mixed carbon scheme becomes a choice. The mixed carbon scheme refers to the drive module of the electric vehicle motor having both SiC and IGBT. In a specific scenario, IGBT or SiC or IGBT and SIC are selected for control to achieve the optimal combination of efficiency and cost.
[0057] In the mixed carbon control scheme, due to the large difference between the characteristic parameters of IGBT and SiC, especially the differences in overcurrent capacity, turn-on and turn-off time, switching loss, efficiency and other characteristics, the control of IGBT and SiC cannot be realized simultaneously. In the mixed carbon control scheme, in order to achieve the highest efficiency, SiC package IGBT or IGBT package SiC needs to be switched in different scenarios to achieve the highest efficiency of the combination of the two and reduce the cost of the whole vehicle. However, the current software method for realizing PWM wave control and switching faces the problem of requiring more MCU resources, which will increase the cost of the single board.
[0058] The embodiment of the utility model provides a kind of drive control circuit, and the multiple waveform needs of mixed carbon control are realized by hardware. Figure 2 It is a structural schematic diagram of the drive control circuit according to the embodiment of the utility model, as Figure 2 The drive control circuit includes: a first adjustment module 10, a second adjustment module 20 and a gating module 30.
[0059] The input end of the first adjustment module 10 and the second adjustment module 20 is used for connecting the PWM signal; the output end of the first adjustment module 10 is connected with the first input end of the gating module 30, and the output end of the second adjustment module 20 is connected with the second input end of the gating module 30.
[0060] The first adjustment module 10 is configured to expand the width of the PWM signal, generate and output an expanded signal; the second adjustment module 20 is configured to reduce the width of the PWM signal, generate and output a reduced signal.
[0061] The first output end and the third output end of the gating module 30 are used for being connected with the SiC drive controller 200, and the second output end and the fourth output end of the gating module 30 are used for being connected with the IGBT drive controller 300; the gating module 30 is configured to: control the first input end and the first output end of the gating module 30 to be turned on, and the second input end and the fourth output end of the gating module 30 are turned on; or, control the first input end and the second output end of the gating module 30 to be turned on, and the second input end and the third output end of the gating module 30 are turned on. Figure 2 In the figure, 1, 2, 3 and 4 represent the first output end, the second output end, the third output end and the fourth output end of the gating module 30 respectively.
[0062] In this embodiment, the first adjusting module 10 and the second adjusting module 20 input the same PWM (Pulse-width modulation) signal, which can be provided by the controller 100. After the width of the PWM signal is expanded by the first adjusting module 10, a wider PWM signal, i.e., an expanded signal, can be obtained. After the width of the PWM signal is reduced by the second adjusting module 20, a narrower (smaller width) PWM signal, i.e., a reduced signal, can be obtained. Figure 2 In the figure, the transmission path of the expanded signal is represented by a red line, and the transmission path of the reduced signal is represented by a yellow line.
[0063] In order to ensure the envelope effect, the high-level period of the expanded signal needs to cover the high-level period of the reduced signal, i.e., the expanded signal can envelope the reduced signal.
[0064] The gating module 30 controls the conduction of the input and output ends thereof. Specifically, the first input end of the gating module 30 is in conduction with the first output end and the second output end of the gating module 30, and the second input end of the gating module 30 is in conduction with the third output end and the fourth output end of the gating module.
[0065] Specifically, when the first input end and the first output end of the gating module 30 are in conduction, the second input end and the fourth output end of the gating module 30 are in conduction. At this time, the SiC drive controller 200 accesses the expanded signal, and the IGBT drive controller 300 accesses the reduced signal, i.e., the SiC signal corresponding to the SiC drive controller 200 has a larger width, and the IGBT signal corresponding to the IGBT drive controller 300 has a smaller width, so the SiC signal can envelope the IGBT signal (referred to as SiC package IGBT).
[0066] When the first input end and the second output end of the gating module 30 are in conduction, the second input end and the third output end of the gating module 30 are in conduction. At this time, the SiC drive controller 200 accesses the reduced signal, and the IGBT drive controller 300 accesses the expanded signal, i.e., the SiC signal corresponding to the SiC drive controller 200 has a smaller width, and the IGBT signal corresponding to the IGBT drive controller 300 has a larger width, so the IGBT signal can envelope the SiC signal (referred to as IGBT package SiC).
[0067] The SiC drive controller 200 and the IGBT drive controller 300 can generate corresponding drive signals based on the input expanded signal or reduced signal, and then control the SiC module 400 and the IGBT module 500, respectively, so as to finally realize the hybrid carbon control of the motor 600.
[0068] Figure 3An effect diagram of the gating module 30 controlling the waveform is shown. As shown in Figure 3 The original PWM signal is expanded and shrunk by the first adjusting module 10 and the second adjusting module 20 to generate the corresponding expanded signal and the shrunk signal. By controlling the gating of the gating module 30, different envelope effects such as SiC wrapping IGBT or IGBT wrapping SiC can be achieved. For details, please refer to Figure 3 .
[0069] The driving control circuit provided in the embodiment uses the first adjusting module 10 and the second adjusting module 20 to respectively expand and shrink the original PWM signal to generate the corresponding expanded signal and the shrunk signal, and the expanded signal can completely envelope the shrunk signal. By controlling the gating of the gating module 30, it can be adjusted to output which one of the expanded signal and the shrunk signal to the SiC driving controller 200 and the IGBT driving controller 300, so as to achieve different envelope effects such as SiC wrapping IGBT or IGBT wrapping SiC. The driving control circuit expands one PWM signal into two adjustable signals in a hardware manner, which not only has a simple implementation, but also does not require the controller 100 to generate multiple PWM signals, thereby greatly reducing the pin requirements of the controller 100 and being conducive to reducing the cost of the mixed carbon control.
[0070] In some optional embodiments, the first adjusting module 10 is configured to delay the falling edge of the PWM signal to generate and output the expanded signal with delayed falling edge; and the second adjusting module 20 is configured to delay the rising edge of the PWM signal to generate and output the shrunk signal with delayed rising edge.
[0071] In the embodiment, the first adjusting module 10 delays the falling edge of the PWM signal, so that the falling edge of the generated expanded signal is later than that of the original PWM signal. The second adjusting module 20 delays the rising edge of the PWM signal, so that the rising edge of the generated shrunk signal is later than that of the original PWM signal.
[0072] In the above manner, the rising edge of the expanded signal is the same as that of the PWM signal, and the rising edge of the shrunk signal is later than that of the PWM signal, so that the rising edge of the expanded signal is earlier than that of the shrunk signal. The falling edge of the expanded signal is later than that of the PWM signal, and the falling edge of the shrunk signal is the same as that of the PWM signal, so that the falling edge of the expanded signal is later than that of the shrunk signal, so that the expanded signal can completely envelope the shrunk signal. Moreover, the first adjusting module 10 only needs to adjust the falling edge of the PWM signal, and the second adjusting module 20 only needs to adjust the rising edge of the PWM signal, which is simple to adjust and easy to implement.
[0073] Optionally, referring toFigure 4 As shown, the first adjustment module 10 includes a first delay circuit 101 and a first comparator 102; the second adjustment module 20 includes a second delay circuit 201 and a second comparator 202.
[0074] The input terminals of the first delay circuit 101 and the second delay circuit 201 are both used to access the PWM signal; for example, the two input terminals are both connected to the controller 100.
[0075] The output terminal of the first delay circuit 101 is connected to the input terminal of the first comparator 102, and the output terminal of the second delay circuit 201 is connected to the input terminal of the second comparator 202. The output terminal of the first comparator 102 is connected to the first input terminal of the gating module 30, and the output terminal of the second comparator 202 is connected to the second input terminal of the gating module 30. Among them, the first delay circuit 101 is configured to delay the falling edge of the PWM signal; the second delay circuit 201 is configured to delay the rising edge of the PWM signal.
[0076] Figure 5 An effect diagram of delaying the rising edge and the falling edge of the PWM signal is shown. As shown in Figure 5 The first delay circuit 101 delays the falling edge of the PWM signal to obtain a first delay signal; similarly, the second delay circuit 201 delays the rising edge of the PWM signal to obtain a second delay signal. As shown in Figure 5 The falling edge of the first delay signal and the rising edge of the second delay signal have poor waveforms.
[0077] After comparison processing by the first comparator 102 and the second comparator 202, the falling edge of the first delay signal and the rising edge of the second delay signal can be adjusted respectively, and finally the expansion signal and the contraction signal that can be used for PWM control are generated. Among them, the first comparator 102 and the second comparator 202 are provided with a reference voltage in advance, and by comparing with the reference voltage, it can be determined whether the first comparator 102 and the second comparator 202 output high level or low level. The size of the reference voltage is determined based on the actual situation, which is not described in detail here.
[0078] As shown in Figure 5 The duty cycle of the expansion signal is greater than that of the contraction signal, and when the contraction signal is high, the expansion signal is also high, so that the expansion signal can envelope the contraction signal.
[0079] In this embodiment, the rising edge and the falling edge of the PWM signal are delayed by the two delay circuits (the first delay circuit 101 and the second delay circuit 201), so that the change speed of the PWM signal can be slowed down. However, after the delay by the delay circuits, the rising edge or the falling edge of the output signal of each delay circuit is relatively slow, and the waveform is poor. The rising edge and the falling edge of the waveform can be controlled within a reasonable range through the comparator (the first comparator 102 and the second comparator 202), so as to ensure the subsequent control effect. In addition, the threshold range of the gating module 30 can be relatively wide, which can cause the problem of poor envelope accuracy of the waveform. The output of the comparator is a relatively complete PWM waveform, which can improve the envelope delay accuracy.
[0080] Optionally, Figure 6 A structural diagram of two delay circuits is shown. As shown in the figure, Figure 6 The first delay circuit 101 includes a first resistor R1, a first capacitor C1 and a first diode D1; and the second delay circuit 201 includes a second resistor R2, a second capacitor C2 and a second diode D2.
[0081] The first end of the first resistor R1 is used to input the PWM signal, and the second end of the first resistor R1 is grounded through the first capacitor C1; the anode of the first diode D1 is connected to the first end of the first resistor R1, and the cathode of the first diode D1 is connected to the second end of the first resistor R1; and the second end of the first resistor R1 is also connected to the input end of the first comparator 102.
[0082] The second end of the second resistor R2 is used to input the PWM signal, and the second end of the second resistor R2 is grounded through the second capacitor C2; the cathode of the second diode D2 is connected to the second end of the second resistor R2, and the anode of the second diode D2 is connected to the second end of the second resistor R2; and the second end of the second resistor R2 is also connected to the input end of the second comparator 202.
[0083] In this embodiment, the first delay circuit 101 and the second delay circuit 201 are connected to the PWM signal output by the controller 100. At the rising edge and the falling edge of the PWM signal, the first delay circuit 101 and the second delay circuit 201 can realize different charging and discharging circuits, and achieve the required delay control.
[0084] Specifically, at the rising edge of the PWM signal, the PWM signal changes from low to high, at this time, the first diode D1 is turned on to directly charge the first capacitor C1, and the RC circuit composed of the first resistor R1 and the first capacitor C1 does not have a delay effect, so the first delay circuit 101 directly outputs a high level, that is, the driving signal output by the first delay circuit 101 at this time has no delay relative to the original PWM signal.
[0085] And, at the rising edge of the PWM signal, the second diode D2 is off, so the PWM signal needs to pass through the RC circuit composed of the second resistor R2 and the second capacitor C2 to delay and charge the second capacitor C2, so the voltage at the second end of the second resistor R2 gradually rises, so that the driving signal output by the second delay circuit 201 has an RC circuit delay relative to the original PWM signal, and the specific delay time can be changed by adjusting the values of the second resistor R2 and the second capacitor C2. Among them, since the addition of RC will make the rising edge flat, which is not conducive to driving, therefore, in the embodiment, the second end of the second resistor R2 is connected to the second comparator 202, and the waveform is shaped by the second comparator 202 to ensure that the second adjustment module 20 can output a driving signal in the form of a square wave, and the rising edge of the driving signal is delayed and the square wave width is reduced.
[0086] Conversely, at the falling edge of the PWM signal, the PWM signal changes from high to low, at this time, the second diode D2 is turned on, and the second capacitor C2 can be directly discharged through the turned-on second diode D2, without delay, so the second delay circuit 201 directly outputs a high level, that is, the driving signal output by the second delay circuit 201 has no delay relative to the original PWM signal.
[0087] And, at the rising edge of the PWM signal, the first diode D1 is off, so the first capacitor C1 needs to pass through the RC circuit composed of the first resistor R1 and the first capacitor C1 to delay and discharge (which can be discharged by the PWM controller 100, and the structure of the PWM controller 100 is not described here), so the voltage at the second end of the first resistor R1 gradually decreases, so that the driving signal output by the first delay circuit 101 has an RC circuit delay relative to the original PWM signal, and the specific delay time can be changed by adjusting the values of the first resistor R1 and the first capacitor C1. In addition, since the addition of RC will make the falling edge of the output signal flat, which is not conducive to driving, therefore, in the embodiment, the second end of the first resistor R1 is connected to the first comparator 102, and the waveform is shaped by the first comparator 102 to ensure that the first adjustment module 10 can output a driving signal in the form of a square wave, and the falling edge of the driving signal is delayed and the square wave width is increased.
[0088] In the embodiment, the falling edge delay and the rising edge delay can be realized by a simple hardware circuit, the implementation is simple, and it can be ensured that the expanded signal can completely envelope the reduced signal.
[0089] Optionally, as shown in Figure 4 the driving control circuit further includes a first OR gate 40 and a second OR gate 50.
[0090] The two input ends of the first OR gate 40 are connected with the first output end and the third output end of the gating module 30 respectively, and the output end of the first OR gate 40 is used for being connected with the SiC drive controller 200; the two input ends of the second OR gate 50 are connected with the second output end and the fourth output end of the gating module 30 respectively, and the output end of the second OR gate 50 is used for being connected with the IGBT drive controller 300.
[0091] In the embodiment, in order to avoid that the gating module 30 simultaneously outputs signals to the SiC drive controller 200 or the IGBT drive controller 300, and also avoid that the two output ends of the gating module 30 are directly connected (for example, the first output end and the third output end are directly connected) to affect the control effect, an AND gate is arranged between the gating module 30 and the SiC drive controller 200 and the IGBT drive controller 300 at the back end, and signal isolation is realized by using the AND gate, so as to ensure the stability of the output signal process of the drive control circuit.
[0092] In some optional embodiments, as shown in Figure 7 The gating module 30 comprises a first gating circuit 301 and a second gating circuit 302; the first gating circuit 301 comprises a first gating unit and a second gating unit; and the second gating circuit 302 comprises a third gating unit and a fourth gating unit. Figure 7 In the embodiment, the corresponding gating units are triangles, Figure 7 From top to bottom, the four gating units are the first gating unit, the second gating unit, the third gating unit and the fourth gating unit in sequence.
[0093] As shown in Figure 7 The input end of the first gating unit is connected with the output end (for example, the output end of the first comparator 102) of the first adjusting module 10, and the output end of the first gating unit is used for being connected with the SiC drive controller 200. For example, the output end of the first gating unit is the first output end of the gating module 30, which is connected with one input end of the first OR gate 40.
[0094] The input end of the second gating unit is connected with the output end (for example, the output end of the second comparator 202) of the second adjusting module 20, and the output end of the second gating unit is used for being connected with the IGBT drive controller 300. For example, the output end of the second gating unit is the fourth output end of the gating module 30, which is connected with one input end of the second OR gate 50.
[0095] The input end of the third gating unit is connected with the output end (for example, the output end of the second comparator 202) of the second adjusting module 20, and the output end of the third gating unit is used for being connected with the SiC drive controller 200. For example, the output end of the third gating unit is the third output end of the gating module 30, which is connected with the other input end of the first OR gate 40.
[0096] The input end of the fourth gating unit is connected with the output end (for example, the output end of the first comparator 102) of the first adjusting module 10, and the output end of the fourth gating unit is used for being connected with the IGBT drive controller 300. For example, the output end of the fourth gating unit is the second output end of the gating module 30, which is connected with the other input end of the second OR gate 50.
[0097] The first gating circuit 301 is used for controlling the first gating unit and the second gating unit to be synchronously turned on or turned off, and the second gating circuit 302 is used for controlling the third gating unit and the fourth gating unit to be synchronously turned on or turned off.
[0098] In the embodiment, when the first gating unit and the second gating unit are synchronously turned on, the third gating unit and the fourth gating unit are synchronously turned off, at this time, the first gating unit outputs the expansion signal to the SiC drive controller 200, the second gating unit outputs the reduction signal to the IGBT drive controller 300, and the SiC is packaged with the IGBT.
[0099] When the first gating unit and the second gating unit are synchronously turned off, the third gating unit and the fourth gating unit are synchronously turned on, at this time, the third gating unit outputs the reduction signal to the SiC drive controller 200, and the fourth gating unit outputs the expansion signal to the IGBT drive controller 300, and the IGBT is packaged with the SiC.
[0100] In the embodiment, the first gating circuit 301 and the second gating circuit 302 which can be synchronously controlled are used to synchronously control the turn-on and turn-off of each gating unit, and the accuracy of the signals transmitted to the rear-end SiC drive controller 200 and the IGBT drive controller 300 is ensured.
[0101] Optionally, as shown in the figure, Figure 8 The gating module 30 further includes an inverter 303 and a third delay circuit 304.
[0102] The gating signal for controlling the gating module 30 is connected with the enable end of one of the first gating circuit 301 and the second gating circuit 302, and is connected with the enable end of the other of the first gating circuit 301 and the second gating circuit 302 through the inverter 303; and the third delay circuit 304 is arranged at the enable end of the first gating circuit 301 or the second gating circuit 302, and is used for delaying the gating signal connected with the first gating circuit 301 or the second gating circuit 302.
[0103] In the embodiment, the first gating circuit 301 and the second gating circuit 302 are respectively provided with an enable terminal (EN), for example, when the enable terminal receives a high level, the corresponding gating unit is controlled to be turned on. The enable terminal of one of the first gating circuit 301 and the second gating circuit 302 is provided with an inverter 303, so that the enable terminals of the two gating circuits (the first gating circuit 301 and the second gating circuit 302) are connected to different signals, and it is ensured that the two gating circuits are not enabled at the same time. Moreover, by setting a third delay circuit 304 to delay the gating signal, the condition that the two gating circuits are enabled at the same time can be avoided when the gating circuit is switched.
[0104] As shown in Figure 8 , an enable signal is provided by the controller 100, the enable signal is directly connected to the enable terminal of the first gating circuit 301, and after being connected in series through the inverter 303 and the third delay circuit 304, the enable signal is connected to the enable terminal of the second gating circuit 302. The inverter 303 can be an existing inverter chip, or can realize signal inversion based on a transistor (such as a triode), and the embodiment is not limited in this regard.
[0105] In the embodiment, the inverter 303 can be used to control the first gating circuit 301 and the second gating circuit 302 based on one gating signal, thereby simplifying the control of the gating module 30. Moreover, based on the third delay circuit 304, the condition that the first gating circuit 301 and the second gating circuit 302 are enabled at the same time can be effectively prevented, thereby ensuring the accuracy of the control.
[0106] The utility model embodiment further provides a kind of drive control device, as shown in Figure 2 , the device includes: controller 100, SiC drive controller 200, IGBT drive controller 300 and the drive control circuit provided by any one of the above embodiments.
[0107] The first signal terminal of the controller 100 is connected to the input terminal of the drive control circuit, for outputting PWM signal, for example, the first signal terminal of the controller 100 is connected to the input terminal of the first adjustment module 10 and the second adjustment module 20 in the drive control circuit. The two output terminals of the drive control circuit are connected to SiC drive controller 200 and IGBT drive controller 300 respectively, specifically, as described above, SiC drive controller 200 and IGBT drive controller 300 are connected based on gating module 30;For example, the output terminal of the first or gate 40 is connected to SiC drive controller 200, and the output terminal of the second or gate 50 is connected to IGBT drive controller 300.
[0108] Optionally, as shown in Figure 8As shown, the second signal terminal of the controller 100 is connected with the gating module 30 of the drive control circuit, and is used for outputting a gating signal to control the gating module 30 to work.
[0109] The drive control device has the beneficial effects of the drive control circuit, which will not be repeated here.
[0110] The embodiment also provides a vehicle comprising the drive control circuit or the drive control device provided by the above embodiment, and the drive control circuit or the drive control device is used to drive the IGBT device and the SiC MOSFET device in the vehicle, and finally to realize the hybrid carbon control of the motor 600.
[0111] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.
Claims
1. A drive control circuit, characterized in that, include: The system comprises a first adjustment module (10), a second adjustment module (20), and a gating module (30); The input terminals of the first adjustment module (10) and the second adjustment module (20) are both used to receive PWM signals; the output terminal of the first adjustment module (10) is connected to the first input terminal of the gating module (30), and the output terminal of the second adjustment module (20) is connected to the second input terminal of the gating module (30); The first adjustment module (10) is configured to increase the width of the PWM signal, generate and output an increased signal; the second adjustment module (20) is configured to decrease the width of the PWM signal, generate and output a decreased signal. The first and third output terminals of the gating module (30) are used to connect to the SiC drive controller (200), and the second and fourth output terminals of the gating module (30) are used to connect to the IGBT drive controller (300). The gating module (30) is configured to: when the first input terminal of the gating module (30) is connected to the first output terminal, the second input terminal of the gating module (30) is connected to the fourth output terminal; or, when the first input terminal of the gating module (30) is connected to the second output terminal, the second input terminal of the gating module (30) is connected to the third output terminal.
2. The drive control circuit according to claim 1, characterized in that, The first adjustment module (10) is configured to delay the falling edge of the PWM signal, generate and output an amplified signal with a delayed falling edge; The second adjustment module (20) is configured to delay the rising edge of the PWM signal, generate and output a reduced signal with a delayed rising edge.
3. The drive control circuit according to claim 2, characterized in that, The first adjustment module (10) includes a first delay circuit (101) and a first comparator (102); the second adjustment module (20) includes a second delay circuit (201) and a second comparator (202); The input terminals of both the first delay circuit (101) and the second delay circuit (201) are used to receive PWM signals; The output terminal of the first delay circuit (101) is connected to the input terminal of the first comparator (102), and the output terminal of the second delay circuit (201) is connected to the input terminal of the second comparator (202). The output of the first comparator (102) is connected to the first input of the gating module (30), and the output of the second comparator (202) is connected to the second input of the gating module (30). The first delay circuit (101) is configured to delay the falling edge of the PWM signal; the second delay circuit (201) is configured to delay the rising edge of the PWM signal.
4. The drive control circuit according to claim 3, characterized in that, The first delay circuit (101) includes: a first resistor (R1), a first capacitor (C1), and a first diode (D1); the second delay circuit (201) includes: a second resistor (R2), a second capacitor (C2), and a second diode (D2); The first end of the first resistor (R1) is used to receive the PWM signal, and the second end of the first resistor (R1) is grounded through the first capacitor (C1); the positive terminal of the first diode (D1) is connected to the first end of the first resistor (R1), and the negative terminal of the first diode (D1) is connected to the second end of the first resistor (R1); the second end of the first resistor (R1) is also connected to the input terminal of the first comparator (102). The second terminal of the second resistor (R2) is used to receive the PWM signal, and the second terminal of the second resistor (R2) is grounded through the second capacitor (C2); the cathode of the second diode (D2) is connected to the second terminal of the second resistor (R2), and the anode of the second diode (D2) is connected to the second terminal of the second resistor (R2); the second terminal of the second resistor (R2) is also connected to the input terminal of the second comparator (202).
5. The drive control circuit according to claim 1, characterized in that, It also includes a first OR gate (40) and a second OR gate (50); The two input terminals of the first OR gate (40) are respectively connected to the first output terminal and the third output terminal of the gating module (30), and the output terminal of the first OR gate (40) is used to connect to the SiC drive controller (200); The two input terminals of the second OR gate (50) are respectively connected to the second output terminal and the fourth output terminal of the gating module (30), and the output terminal of the second OR gate (50) is used to connect to the IGBT drive controller (300).
6. The drive control circuit according to claim 1, characterized in that, The gating module (30) includes: a first gating circuit (301) and a second gating circuit (302); the first gating circuit (301) includes a first gating unit and a second gating unit; the second gating circuit (302) includes a third gating unit and a fourth gating unit; The input terminal of the first gating unit is connected to the output terminal of the first adjustment module (10), and the output terminal of the first gating unit is used to connect to the SiC drive controller (200); The input terminal of the second gating unit is connected to the output terminal of the second adjustment module (20), and the output terminal of the second gating unit is used to connect to the IGBT drive controller (300); The input terminal of the third gating unit is connected to the output terminal of the second adjustment module (20), and the output terminal of the third gating unit is used to connect to the SiC drive controller (200); The input terminal of the fourth gating unit is connected to the output terminal of the first adjustment module (10), and the output terminal of the fourth gating unit is used to connect to the IGBT drive controller (300). The first gating circuit (301) is used to control the first gating unit and the second gating unit to be turned on or off synchronously; the second gating circuit (302) is used to control the third gating unit and the fourth gating unit to be turned on or off synchronously.
7. The drive control circuit according to claim 6, characterized in that, The gating module (30) further includes: an inverter (303) and a third delay circuit (304); The selection signal used to control the selection module (30) is connected to the enable terminal of one of the first selection circuit (301) and the second selection circuit (302), and is connected to the enable terminal of the other of the first selection circuit (301) and the second selection circuit (302) through the inverter (303); The third delay circuit (304) is set at the enable terminal of the first gating circuit (301) or the second gating circuit (302) and is used to delay the gating signal connected to the first gating circuit (301) or the second gating circuit (302).
8. A drive control device, characterized in that, include: The controller (100), the SiC drive controller (200), the IGBT drive controller (300), and the drive control circuit as described in any one of claims 1 to 7; The first signal terminal of the controller (100) is connected to the input terminal of the drive control circuit and is used to output a PWM signal; The two output terminals of the drive control circuit are respectively connected to the SiC drive controller (200) and the IGBT drive controller (300).
9. The drive control device according to claim 8, characterized in that, The second signal terminal of the controller (100) is connected to the gating module (30) of the drive control circuit and is used to output a gating signal.
10. A vehicle, characterized in that, include: The drive control circuit as described in any one of claims 1 to 7, or the drive control device as described in claim 8 or 9.