Two-way synchronous IGBT (Insulated Gate Bipolar Translator) driving optimization device

Abstract

The utility model provides a two-way synchronous IGBT driving optimization device. The two-way synchronous IGBT driving optimization device comprises a power supply module, a signal processing module, a driving amplification module, an isolation module and a protection and monitoring module, the power supply module is connected to an external power supply through a power line, and the power supply module is used for providing a working power supply for the whole device; and the signal processing module is used for receiving a control signal input from the outside, processing and shaping the control signal, and generating a control signal for driving the IGBT. According to the utility model, through accurate synchronous processing and optimized driving amplification, the synchronism of two paths of driving signals is obviously improved, the current imbalance and switching loss in the IGBT switching process are reduced, and the system efficiency and stability are improved; meanwhile, the strong driving capability can meet the quick switching-on and switching-off requirements of the high-power IGBT, and the response speed and the performance of the system are improved; and an advanced isolation technology and a perfect protection monitoring mechanism are adopted, so that the anti-interference capability is effectively enhanced, and the reliability and the safety of the system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power electronics, in particular to a dual-path synchronous IGBT drive optimization device. Background Art

[0002] Insulated-gate bipolar transistors (IGBTs) combine the advantages of giant transistors (GTRs) and power MOSFETs, offering excellent characteristics and a wide range of applications. IGBTs are also three-terminal devices: gate, collector, and emitter. In modern power electronics, IGBTs are widely used in various power conversion circuits due to their excellent performance. However, to ensure reliable and efficient operation of IGBTs, they require precise, synchronized, and powerful drive signals.

[0003] Existing IGBT driver devices often have some shortcomings in practical applications. For example, poor synchronization of the dual-path drive signals can lead to current imbalance during IGBT switching, increasing switching losses and affecting system efficiency and stability. Their limited drive capability cannot meet the requirements of high-power IGBTs, resulting in slow turn-on and turn-off speeds and affecting system response speed. Their weak anti-interference capability makes them susceptible to external electromagnetic interference, which can cause malfunctions and reduce system reliability. Therefore, a dual-path synchronous IGBT driver optimization device is proposed. Utility Model Content

[0004] In view of this, the present invention hopes to provide a dual-path synchronous IGBT drive optimization device to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0005] The technical solution of the embodiment of the utility model is achieved as follows: a dual-circuit synchronous IGBT drive optimization device, including a power supply module, a signal processing module, a drive amplification module, an isolation module and a protection and monitoring module;

[0006] The power supply module is connected to an external power supply via a power line, and the power supply module is used to provide working power for the entire device;

[0007] The signal processing module is used to receive the external input control signal, process and shape it, and generate the control signal to drive the IGBT. The signal processing module is connected to the power supply module to obtain power, and is connected to the drive amplifier module through the internal circuit to output the processed control signal;

[0008] The driving amplifier module receives the control signal from the signal processing module and amplifies the processed control signal, and transmits the amplified signal to the gate of the IGBT through the driving line;

[0009] The isolation module is connected to the signal processing module and the drive amplification module through an isolation interface, and the isolation module is used to electrically isolate the control circuit from the main circuit;

[0010] The protection and monitoring module is connected to the IGBT via a monitoring line and is connected to the control circuit via a signal line. The protection and monitoring module is used to monitor the working status of the IGBT in real time and feed back relevant information to the signal processing module;

[0011] Further preferably, the power supply module includes an input filtering unit, a voltage conversion unit and an output voltage stabilization unit;

[0012] The input filter unit is used to filter the input power supply to eliminate high-frequency noise and interference in the power supply;

[0013] The voltage conversion unit is used to convert the input voltage into the voltage level for each module to work;

[0014] The output voltage stabilizing unit is used to stabilize the output voltage.

[0015] Further preferably, the signal processing module includes a signal receiving unit, a synchronization processing unit and a logic control unit;

[0016] The signal receiving unit is used to receive an external control signal;

[0017] The synchronization processing unit is used to perform synchronization calibration on the two control signals;

[0018] The logic control unit is used to process the synchronized signals according to preset logic rules to generate two drive control signals.

[0019] Further preferably, the driving amplification module includes a preamplification unit, a power amplification unit and a driving current regulation unit;

[0020] The preamplifier unit is used to preliminarily amplify the drive control signal from the signal processing module;

[0021] The power amplification unit is used to further increase the power of the signal;

[0022] The driving current regulating unit is used to regulate the magnitude of the driving current in real time according to the characteristics and working requirements of the IGBT.

[0023] Further preferably, the isolation module includes a signal isolation unit and a power isolation unit;

[0024] The signal isolation unit is used to protect the drive control signal from being interfered with during transmission;

[0025] The power isolation unit is used to isolate the power supply of the drive circuit from the power supply of the control circuit.

[0026] Further preferably, the protection and monitoring module includes an overcurrent protection unit, an overvoltage protection unit, a temperature monitoring unit and a fault alarm unit;

[0027] The overcurrent protection unit is used to monitor the driving current in real time and quickly cut off the driving signal if it exceeds a set threshold;

[0028] The overvoltage protection unit is used to monitor the voltage across the IGBT;

[0029] The temperature monitoring unit is used to detect the operating temperature of the IGBT and the drive device, and if the temperature is too high, protective measures are taken;

[0030] The fault alarm unit is used to send out an alarm signal when an overcurrent, overvoltage or overheating fault is detected, prompting the operator to handle it.

[0031] Further preferably, the signal processing module further includes a signal filtering unit for filtering the received external input control signal to remove clutter interference.

[0032] Further preferably, the driving and amplifying module further includes a short-circuit protection unit, configured to cut off the output when an output short circuit is detected.

[0033] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0034] The utility model significantly improves the synchronization of dual-path drive signals through precise synchronization processing and optimized drive amplification, reduces current imbalance and switching loss during IGBT switching, and improves system efficiency and stability; at the same time, the powerful driving capability can meet the rapid turn-on and turn-off requirements of high-power IGBTs, improving the response speed and performance of the system; and adopts advanced isolation technology and a complete protection and monitoring mechanism, effectively enhancing the anti-interference capability and improving the reliability and safety of the system.

[0035] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0038] Figure 2 This is a schematic diagram of the structure of the signal processing module and the drive amplification module of the present invention;

[0039] Figure 3 This is a schematic structural diagram of the isolation module and the protection and monitoring module of the utility model. DETAILED DESCRIPTION

[0040] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0041] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] like Figure 1-Figure 3 As shown, the embodiment of the utility model provides a dual-channel synchronous IGBT drive optimization device, including a power supply module, a signal processing module, a drive amplification module, an isolation module and a protection and monitoring module;

[0043] The power module is connected to the external power supply through a power cord. The power module is used to provide working power for the entire device. The power module provides a stable and reliable power supply for the entire device, thereby ensuring that each module can work normally under complex working conditions;

[0044] The signal processing module is used to receive external input control signals, process and shape them, and generate control signals to drive the IGBT. The signal processing module is connected to the power supply module to obtain electrical energy, and is connected to the drive amplifier module through internal circuits to output the processed control signals. The signal processing module accurately processes the external input control signals to generate stable and reliable drive control signals, thereby ensuring accurate control of the IGBT.

[0045] The driver amplifier module receives the control signal from the signal processing module and amplifies the processed control signal. The driver amplifier module transmits the amplified signal to the gate of the IGBT through the drive line. The driver amplifier module amplifies the processed control signal to a level sufficient to drive the IGBT and has a short-circuit protection function to ensure the safe operation of the IGBT.

[0046] The isolation module is connected to the signal processing module and the drive amplifier module through the isolation interface. The isolation module is used to electrically isolate the control circuit from the main circuit to ensure the stable operation and safety of the system;

[0047] The protection and monitoring module is connected to the IGBT via a monitoring line and to the control circuit via a signal line. The protection and monitoring module is used to monitor the working status of the IGBT in real time and feed back relevant information to the signal processing module to ensure the safe operation of the IGBT and the reliability of the system.

[0048] In one embodiment, specifically: the power module includes an input filtering unit, a voltage conversion unit, and an output voltage stabilizing unit;

[0049] The input filter unit is used to filter the input power supply and eliminate high-frequency noise and interference in the power supply. The input filter unit adopts LC filter circuit to effectively filter out high-frequency noise and electromagnetic interference in the external power supply to ensure the purity of the power input;

[0050] The voltage conversion unit is used to convert the input voltage into a voltage level suitable for the operation of each module. The voltage conversion unit uses a DC-DC converter to convert the input wide range DC voltage into the stable DC voltage required by each module, such as ±15V, 5V, etc.

[0051] The output voltage stabilization unit is used to stabilize the output voltage and is not affected by load changes and input voltage fluctuations. The output voltage stabilization unit uses LDO (low dropout linear regulator) or DC-DC voltage stabilization circuit to ensure the stability of the output voltage and ripple suppression capability to meet high-precision drive requirements.

[0052] In one embodiment, specifically: the signal processing module includes a signal receiving unit, a synchronization processing unit and a logic control unit;

[0053] The signal receiving unit is used to receive an external input control signal. The signal receiving unit receives an external input PWM (pulse width modulation) control signal through a high-speed optocoupler or a differential receiver;

[0054] The synchronization processing unit is used to synchronize and calibrate the two control signals. The synchronization processing unit uses a synchronous phase-locked loop (PLL) or a time reference circuit to synchronize and calibrate the two control signals to ensure that the switching actions of the two IGBTs are strictly synchronized.

[0055] The logic control unit is used to process the synchronized signals according to preset logic rules to generate two-way drive control signals that meet the requirements. The logic control unit is used to process the synchronized signals according to preset logic rules (such as dead time setting, fault protection logic, etc.) to generate two-way drive control signals that meet the requirements.

[0056] In one embodiment, specifically: the driving amplification module includes a preamplification unit, a power amplification unit and a driving current adjustment unit;

[0057] The preamplifier unit is used to preliminarily amplify the drive control signal from the signal processing module. The preamplifier unit uses an operational amplifier to preliminarily amplify the drive control signal from the signal processing module to improve the driving ability of the signal;

[0058] The power amplifier unit is used to further increase the power of the signal. The power amplifier unit uses power devices such as MOSFET or IGBT to construct a push-pull or H-bridge power amplifier circuit to further increase the power of the signal and meet the driving requirements of the IGBT.

[0059] The drive current regulation unit is used to adjust the drive current in real time according to the characteristics and working requirements of the IGBT. The drive current regulation unit monitors and adjusts the drive current in real time through the feedback circuit and current regulator to ensure that the IGBT can obtain the best driving effect under different working conditions.

[0060] In one embodiment, specifically: the isolation module includes a signal isolation unit and a power isolation unit;

[0061] The signal isolation unit is used to protect the drive control signal from interference during transmission. The signal isolation unit uses a high-speed optical coupler or magnetic isolator to electrically isolate the drive control signal to prevent noise in the drive circuit from being fed back to the control circuit.

[0062] The power isolation unit is used to isolate the power supply of the drive circuit from the power supply of the control circuit. The power isolation unit uses an isolation transformer or a DC-DC isolation power supply to isolate the power supply of the drive circuit from the power supply of the control circuit, thereby improving the electrical safety and anti-interference ability of the system.

[0063] In one embodiment, specifically: the protection and monitoring module includes an overcurrent protection unit, an overvoltage protection unit, a temperature monitoring unit, and a fault alarm unit;

[0064] The overcurrent protection unit is used to monitor the driving current in real time. If it exceeds the set threshold, the driving signal is quickly cut off to protect the IGBT from overcurrent damage;

[0065] The overvoltage protection unit is used to monitor the voltage across the IGBT to ensure it is within a safe range;

[0066] The temperature monitoring unit is used to detect the operating temperature of the IGBT and the drive device. If the temperature is too high, appropriate protective measures will be taken;

[0067] The fault alarm unit is used to send out an alarm signal when an overcurrent, overvoltage or overheating fault is detected, prompting the operator to handle it.

[0068] In one embodiment, specifically: the signal processing module also includes a signal filtering unit for filtering the received external input control signal to remove clutter interference. The signal filtering unit uses a low-pass filter to filter the received control signal to remove high-frequency noise and clutter interference.

[0069] In one embodiment, specifically: the driving amplifier module also includes a short-circuit protection unit, which is used to cut off the output when an output short circuit is detected. The short-circuit protection unit integrates a short-circuit detection circuit. Once an output short circuit is detected, the output is immediately cut off to protect the IGBT and the driving circuit from damage.

[0070] When the utility model is working: the power supply module is first connected to the external power supply through the power cord and starts working; the input filtering unit filters the input power supply to eliminate high-frequency noise and interference; the voltage conversion unit converts the input voltage into a voltage level suitable for the signal processing module, the drive amplification module, the isolation module and the protection and monitoring module; the output voltage stabilization unit ensures that the output voltage is stable and is not affected by load changes and input voltage fluctuations; the signal receiving unit of the signal processing module receives two control signals input from the outside; the signal filtering unit filters the received control signals to remove clutter interference; the synchronization processing unit synchronizes and calibrates the two control signals to ensure their consistency in time and phase; the logic control unit synchronizes the synchronized signals according to preset logic rules. The signal is processed to generate two drive control signals that meet the requirements. The signal isolation unit of the isolation module electrically isolates the drive control signal output from the signal processing module to prevent the noise in the drive circuit from being fed back to the control circuit. At the same time, the power isolation unit isolates the power supply of the drive circuit from the power supply of the control circuit to further improve the electrical safety of the system. The preamplifier unit of the drive amplifier module preliminarily amplifies the drive control signal from the signal processing module. The power amplifier unit further increases the power of the signal to ensure that it can drive the IGBT. The drive current regulation unit adjusts the drive current in real time according to the characteristics and working requirements of the IGBT to ensure the reliable operation of the IGBT. The amplified drive signal is transmitted to the gate of the IGBT through the drive line to drive the IGBT to work.

[0071] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A dual-circuit synchronous IGBT drive optimization device, characterized by: Including power supply module, signal processing module, drive amplifier module, isolation module and protection and monitoring module; The power supply module is connected to an external power supply via a power line, and the power supply module is used to provide working power for the entire device; The signal processing module is used to receive the external input control signal, process and shape it, and generate the control signal to drive the IGBT. The signal processing module is connected to the power supply module to obtain power, and is connected to the drive amplifier module through the internal circuit to output the processed control signal; The driving amplifier module receives the control signal from the signal processing module and amplifies the processed control signal, and transmits the amplified signal to the gate of the IGBT through the driving line; The isolation module is connected to the signal processing module and the drive amplification module through an isolation interface, and the isolation module is used to electrically isolate the control circuit from the main circuit; The protection and monitoring module is connected to the IGBT via a monitoring line and is connected to the control circuit via a signal line. The protection and monitoring module is used to monitor the working status of the IGBT in real time and feed back relevant information to the signal processing module.

2. The dual-circuit synchronous IGBT drive optimization device according to claim 1, characterized in that: The power supply module includes an input filtering unit, a voltage conversion unit and an output voltage stabilization unit; The input filter unit is used to filter the input power supply to eliminate high-frequency noise and interference in the power supply; The voltage conversion unit is used to convert the input voltage into a voltage level suitable for the operation of each module; The output voltage stabilizing unit is used to stabilize the output voltage and is not affected by load changes and input voltage fluctuations.

3. The dual-circuit synchronous IGBT drive optimization device according to claim 1, characterized in that: The signal processing module includes a signal receiving unit, a synchronization processing unit and a logic control unit; The signal receiving unit is used to receive an external control signal; The synchronization processing unit is used to perform synchronization calibration on the two control signals; The logic control unit is used to process the synchronized signals according to preset logic rules to generate two-way driving control signals that meet the requirements.

4. The dual-circuit synchronous IGBT drive optimization device according to claim 1, characterized in that: The driving amplification module includes a preamplifier unit, a power amplification unit and a driving current adjustment unit; The preamplifier unit is used to preliminarily amplify the drive control signal from the signal processing module; The power amplification unit is used to further increase the power of the signal; The driving current regulating unit is used to regulate the magnitude of the driving current in real time according to the characteristics and working requirements of the IGBT.

5. The dual-circuit synchronous IGBT drive optimization device according to claim 1, characterized in that: The isolation module includes a signal isolation unit and a power isolation unit; The signal isolation unit is used to protect the drive control signal from interference during transmission and prevent noise in the drive circuit from being fed back to the control circuit; The power isolation unit is used to isolate the power supply of the drive circuit from the power supply of the control circuit.

6. The dual-circuit synchronous IGBT drive optimization device according to claim 1, characterized in that: The protection and monitoring module includes an overcurrent protection unit, an overvoltage protection unit, a temperature monitoring unit and a fault alarm unit; The overcurrent protection unit is used to monitor the driving current in real time and quickly cut off the driving signal if it exceeds a set threshold; The overvoltage protection unit is used to monitor the voltage across the IGBT; The temperature monitoring unit is used to detect the operating temperature of the IGBT and the drive device. If the temperature is too high, corresponding protective measures are taken; The fault alarm unit is used to send out an alarm signal when an overcurrent, overvoltage or overheating fault is detected, prompting the operator to handle it.

7. The dual-circuit synchronous IGBT drive optimization device according to claim 3, characterized in that: The signal processing module further includes a signal filtering unit for filtering the received external input control signal to remove clutter interference.

8. The dual-circuit synchronous IGBT drive optimization device according to claim 4, characterized in that: The driving and amplifying module further includes a short-circuit protection unit, which is used to cut off the output when an output short circuit is detected.

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