CN210201706U - Inverter driving circuit for high-speed air compressor of fuel cell automobile - Google Patents
Inverter driving circuit for high-speed air compressor of fuel cell automobile Download PDFInfo
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- CN210201706U CN210201706U CN201921236565.4U CN201921236565U CN210201706U CN 210201706 U CN210201706 U CN 210201706U CN 201921236565 U CN201921236565 U CN 201921236565U CN 210201706 U CN210201706 U CN 210201706U
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Abstract
An inverter driving circuit for a high-speed air compressor of a fuel cell vehicle, comprising: the driving module is used for generating a driving signal; the signal output module is used for outputting a control signal; an IGBT module; and the time delay module is used for detecting errors and preventing mistaken switching-on and switching-off, wherein the signal output module is connected between the driving module and the IGBT module in series, the time delay module is connected between the driving module and the direct-current bus, the signal output module comprises an amplification module and a rear-stage driving output module, a driving signal output by the driving module is processed by the amplification module and then transmitted to the rear-stage driving output module, the rear-stage driving output module is connected with a grid electrode of the IGBT module, and the driving module comprises a control panel used for receiving commands from an upper computer and a driving chip connected to the control panel and used for generating driving signals. The utility model discloses can guarantee that driving signal is reliable and stable when fuel cell air compressor machine inverter operation for IGBT's switching speed, reduce switching loss, reduce the switch in-process electromagnetic interference problem.
Description
Technical Field
The utility model relates to a power electronic circuit technical field particularly, relates to a high-speed air compressor of fuel cell car is with dc-to-ac converter drive circuit.
Background
The IGBT in the inverter is a core component for electric energy conversion, and the problems of large self loss, serious electromagnetic interference and the like can be caused due to the fact that the IGBT works in the environment of high voltage and large current and high-frequency chopping in the electric energy conversion process. In addition, the inverter circuit has a plurality of IGBT switching tubes, and there are a large number of switching states. In the switching process of each switching tube, the driving floating ground potential changes more frequently, and the driving signal is easily influenced by the switching tube. Therefore, in order to ensure the switching characteristics of the IGBT and enhance the self-protection function, the design of the inverter driving circuit becomes one of the important points of the inverter design.
Although the current IGBT driving circuit can meet the basic requirements of driving and protection, most of the IGBT driving circuits have certain problems. For example, overcurrent protection has no self-locking capability, and the shutdown effect is not good, so that the working frequency and the control precision are limited, and the like. The fuel cell air compressor has high rotating speed and large voltage and current, so the requirements on the switching frequency, the control precision and the fault handling capacity of the inverter are also improved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high-speed air compressor of fuel cell car is with dc-to-ac converter drive circuit for solve at least one problem that exists among the above-mentioned prior art.
In order to achieve the above object, the present invention provides an inverter driving circuit for a high-speed air compressor of a fuel cell vehicle, which comprises:
the driving module is used for generating a driving signal;
the signal output module is used for outputting a control signal;
the IGBT module is used for realizing three-phase output; and
a delay module for detecting error and preventing error disconnection,
wherein the signal output module is connected in series between the driving module and the IGBT module, the delay module is connected between the driving module and the DC bus,
the signal output module comprises an amplifying module and a rear-stage driving output module, the driving signal output by the driving module is processed by the amplifying module and then transmitted to the rear-stage driving output module, the rear-stage driving output module is connected with the grid electrode of the IGBT module,
the driving module comprises a control board for receiving commands from the upper computer and a driving chip connected to the control board for generating driving signals.
In an embodiment of the present invention, the delay module includes a first capacitor, a first resistor and a high voltage diode, wherein the first capacitor is used for adjusting the blanking time, the first resistor is used for current limiting, the high voltage diode is used for preventing reverse voltage breakdown, the first resistor and the high voltage diode are connected in series between the driver chip and the high voltage terminal of the IGBT module, and the first capacitor is connected between the driver chip and the ground.
In an embodiment of the present invention, the amplifying module includes an NPN type switching transistor, a PNP type switching transistor, and a current limiting resistor, the NPN type switching transistor is connected in series with the PNP type switching transistor, the NPN type switching transistor is connected to an external power source, and the PNP type switching transistor is connected to ground; one end of the current-limiting resistor is connected with the driving chip, and the other end of the current-limiting resistor is connected with the base electrode of the NPN type switching triode and the base electrode of the PNP type switching triode.
In an embodiment of the present invention, the rear-stage driving output module includes a bi-directional zener diode, a second capacitor and a pull-down resistor,
the bidirectional voltage stabilizing diode is used for preventing the grid of the IGBT module from being damaged due to overhigh voltage, the second capacitor is used for filtering, the pull-down resistor is used for reducing adverse effects caused by parasitic capacitance, and the bidirectional voltage stabilizing diode, the second capacitor and the pull-down resistor are connected between the amplifying module and the ground in parallel.
The utility model provides a high-speed air compressor of fuel cell car is with dc-to-ac converter drive circuit can convert the instruction that comes from the front end input into reliable, the drive signal of high accuracy, and self has certain jam-proof and fault handling ability simultaneously. The driving chip is connected to the grid of the IGBT module through a driving resistor, the switching characteristic of the IGBT can be changed through the resistance value of the driving resistor, and the switching speed of the IGBT is increased, the switching loss is reduced, and the problem of electromagnetic interference in the switching process is solved through weighing values; the bidirectional voltage stabilizing diode in the rear-stage driving output module can prevent the IGBT from being damaged due to overhigh voltage of an output driving signal when the driving circuit outputs a fault; a gate pull-down resistor of the rear-stage driving output module is added to form a low-impedance circuit, so that the situation that the IGBT is triggered by mistake due to voltage rise generated by parasitic capacitance is prevented. The driving chip has the function of driving voltage under-voltage protection, so that short-circuit protection is added on the basis. When the IGBT is conducted, the diode is clamped and limited due to the fact that conducting voltage is low; when the IGBT is in short circuit, the voltage at two ends of the capacitor is continuously charged, and when the preset value is reached, the driving chip enters a protection state to block the IGBT driving output. By using the driving circuit of the utility model, the driving signal can be ensured to be stable and reliable when the inverter for the fuel cell air compressor operates, the switching speed of the IGBT is accelerated, the switching loss is reduced, and the problem of electromagnetic interference in the switching process is reduced; meanwhile, the circuit has a self-protection function and protects the driving circuit and the IGBT module under emergency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a circuit diagram of an inverter driving circuit for a high-speed air compressor of a fuel cell vehicle according to an embodiment of the present invention.
Description of reference numerals: 1-a drive module; 11-a control panel; 12-a driver chip; 2-a delay module; 3-a signal output module; 31-an amplification module; 32-a rear stage drive output module; 4-IGBT module.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
Fig. 1 is the circuit diagram of the inverter driving circuit for the high-speed air compressor of fuel cell car according to an embodiment of the present invention, as shown in fig. 1, the present invention provides an inverter driving circuit for the high-speed air compressor of fuel cell car, which includes:
the driving module 1 is used for generating a driving signal;
the signal output module 3 is used for outputting a control signal;
the IGBT module 4 is used for realizing three-phase output; and
a delay module 2 for detecting error and preventing error cut-off,
wherein, the signal output module 3 is connected in series between the driving module 1 and the IGBT module 4, the delay module 2 is connected between the driving module 1 and the DC bus,
the signal output module 3 includes an amplification module 31 and a rear stage driving output module 32, the driving signal output by the driving module 1 is processed by the amplification module 31 and then transmitted to the rear stage driving output module 32, the rear stage driving output module 32 is connected with the gate of the IGBT module 4, and the signal output module 3 further includes a driving resistor R14 and a voltage reduction protection resistor R18. The driving resistor R14 is connected to the gate of the IGBT module; the buck protection resistor R18 is connected to the gate of the IGBT module by the driver module 1, and when the IGBT module is turned on, CLAMP can be grounded or pulled low.
The driving module 1 comprises a control board 11 for receiving commands from an upper computer and a driving chip 12 connected to the control board 11 for generating driving signals, wherein the control board 11 is connected with the driving chip 12 through a flat cable. The control signal output by the control board 11 enters the driving chip 12 in the form of pulse, and is converted into a driving signal in the driving chip 12 and then transmitted to the amplifying module 31; the driving signal is amplified by the external power supply to become an electric signal which can be identified by the IGBT module, and then the electric signal is transmitted to the rear-stage driving output module 32; the electrical signal processed by the post-stage driving output module 32 does not contain a false trigger signal and a damage voltage, and the signal can be transmitted to the IGBT module 4. At this time, the signal received by the IGBT module 4 is a processed signal without interference, and normal operation of the inverter can be ensured.
It should be noted that the IGBT module is composed of three single bridges, where each single bridge may be divided into two parts, namely a high-voltage end and a low-voltage end, that is, the IGBT module may be divided into six paths. The utility model discloses only carry out the analysis all the way among the six way IGBTs that have the same drive mode.
As shown in fig. 1, the delay module 2 includes a first capacitor C9, a first resistor R10, and a high voltage diode D5, wherein the first capacitor C9 is used for adjusting the blanking time, the first resistor R10 is used for current limiting, the high voltage diode D5 is used for preventing reverse voltage breakdown, the first resistor R10 and the high voltage diode D5 are connected in series between the driving chip 12 and the high voltage terminal of the IGBT module 4, and the first capacitor C9 is connected between the driving chip 12 and ground.
In fig. 1, the amplifying module 31 includes an NPN type switching transistor Q7, a PNP type switching transistor Q8, and a current limiting resistor R11, the NPN type switching transistor Q7 is connected in series with the PNP type switching transistor Q8, the NPN type switching transistor Q7 is connected to an external power source, and the PNP type switching transistor Q8 is connected to ground; one end of the current limiting resistor R11 is connected with the driving chip 12, the other end is connected with the base of the NPN type switching triode Q7 and the base of the PNP type switching triode Q8, and the current limiting resistor R11 is used for amplifying an output signal.
The rear-stage driving output module 32 comprises a bidirectional voltage stabilizing diode TVS1, a second capacitor C11 and a pull-down resistor R16, the second capacitor C11 and the pull-down resistor R16 form an RC filter circuit, and the bidirectional voltage stabilizing diode TVS1 and the RC filter circuit are connected between the gate driving signal of the IGBT module and the ground in parallel to ensure the stability of the signal.
The bidirectional voltage stabilizing diode TVS1 is used for preventing the grid of the IGBT module 4 from being damaged by overhigh voltage, the second capacitor C11 is used for filtering, the pull-down resistor R16 is used for reducing adverse effects caused by parasitic capacitance, and the bidirectional voltage stabilizing diode TVS1, the second capacitor C11 and the pull-down resistor R16 are connected between the amplifying module and the ground in parallel.
In the delay module 2, the high-voltage diode D5 is connected to the high-voltage side of the IGBT module and has a high withstand voltage, so the high-voltage diode D5 is selected to prevent breakdown, and the leakage current of the high-voltage diode D5 also affects the voltage of the first capacitor C9, so the leakage current is required to be as small as possible, and therefore the high-voltage diode or two diodes are selected to be used in series. The first resistor R10 and the first capacitor C9 constitute a delay link for short-circuit fault detection, because the turn-on process of the IGBT requires a certain time, the voltage between the collector and the emitter of the IGBT is still large during this time, and at this time, the saturation voltage drop detection function of the driver chip 12 should be shielded to avoid misjudgment.
Referring to fig. 1, the current limiting resistor R11 in the amplifying circuit 31 can adjust the current input to the NPN type switching transistor Q7 and the PNP type switching transistor Q8, so as to ensure that the two switching transistors are not damaged while working normally. When the driving module 1 outputs a high level, the NPN type switching transistor Q7 can be turned on and the PNP type switching transistor Q8 can be turned off through the current limiting resistor R11, and at this time, after the driving signal is amplified by the external power supply through the NPN type switching transistor Q7, a signal which can be identified by the IGBT is generated and transmitted to the gate of the IGBT; when the driving module 1 outputs a low level, the PNP switching transistor Q8 is turned on and the NPN switching transistor Q7 is turned off through the current limiting resistor R11, and at this time, the driving signal is grounded through the PNP switching transistor Q8 to generate a low signal for turning off the IGBT, and the low signal is transmitted to the gate of the IGBT.
Referring to fig. 1, the bidirectional zener diode TVS1 can prevent the gate of the IGBT from being damaged due to the voltage of the output driving signal when the output of the driving circuit fails, and its regulated voltage value should be slightly higher than the driving voltage, and may be ± 18V. After the electric signal is amplified by the amplifying module 31, the electric signal may have the phenomena of peaks, burrs and the like, and the influence caused by the problems can be effectively reduced by arranging the filter capacitor C11; parasitic capacitances exist between the collector and the gate and the emitter of the IGBT, and when the voltage between the collector and the emitter of the IGBT changes suddenly, current can be generated through the parasitic capacitances, so that the gate potential rises, and the IGBT is triggered by mistake. In order to prevent this, a gate pull-down resistor R16 is usually connected between the gate and emitter of the IGBT to provide a low impedance path to ensure that the IGBT gate potential is not disturbed.
The utility model provides a high-speed air compressor of fuel cell car is with dc-to-ac converter drive circuit can convert the instruction that comes from the front end input into reliable, the drive signal of high accuracy, and self has certain jam-proof and fault handling ability simultaneously. The driving chip is connected to the grid of the IGBT through a driving resistor, the switching characteristic of the IGBT can be changed through the resistance value of the driving resistor, and the switching speed of the IGBT is increased, the switching loss is reduced, and the problem of electromagnetic interference in the switching process is solved through weighing values; the bidirectional voltage stabilizing diode in the rear-stage driving output module can prevent the IGBT from being damaged due to overhigh voltage of an output driving signal when the driving circuit outputs a fault; a gate pull-down resistor of the rear-stage driving output module is added to form a low-impedance circuit, so that the situation that the IGBT is triggered by mistake due to voltage rise generated by parasitic capacitance is prevented. The driving chip has the function of driving voltage under-voltage protection, so that short-circuit protection is added on the basis. When the IGBT is conducted, the diode is clamped and limited due to the fact that conducting voltage is low; when the IGBT is in short circuit, the voltage at two ends of the capacitor is continuously charged, and when the preset value is reached, the driving chip enters a protection state to block the IGBT driving output. By using the driving circuit of the utility model, the driving signal can be ensured to be stable and reliable when the inverter for the fuel cell air compressor operates, the switching speed of the IGBT is accelerated, the switching loss is reduced, and the problem of electromagnetic interference in the switching process is reduced; meanwhile, the circuit has a self-protection function and protects the driving circuit and the IGBT module under emergency.
Those of ordinary skill in the art will understand that: the figures are schematic representations of one embodiment, and the blocks or processes in the figures are not necessarily required to practice the present invention.
Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (4)
1. An inverter driving circuit for a high-speed air compressor of a fuel cell vehicle, comprising:
the driving module is used for generating a driving signal;
the signal output module is used for outputting a control signal;
the IGBT module is used for realizing three-phase output; and
a delay module for detecting error and preventing error disconnection,
wherein the signal output module is connected in series between the driving module and the IGBT module, the delay module is connected between the driving module and the DC bus,
the signal output module comprises an amplifying module and a rear-stage driving output module, the driving signal output by the driving module is processed by the amplifying module and then transmitted to the rear-stage driving output module, the rear-stage driving output module is connected with the grid electrode of the IGBT module,
the driving module comprises a control board for receiving commands from the upper computer and a driving chip connected to the control board for generating driving signals.
2. The inverter driving circuit for a high-speed air compressor of a fuel cell vehicle as claimed in claim 1, wherein the delay module includes a first capacitor for adjusting a blanking time, a first resistor for limiting a current, and a high-voltage diode for preventing a reverse voltage breakdown, the first resistor and the high-voltage diode are connected in series between the driving chip and the high-voltage terminal of the IGBT module, and the first capacitor is connected between the driving chip and a ground.
3. The inverter driving circuit for a fuel cell vehicle high-speed air compressor according to claim 1, wherein the amplifying module comprises an NPN-type switching transistor, a PNP-type switching transistor, and a current limiting resistor, the NPN-type switching transistor and the PNP-type switching transistor are connected in series, the NPN-type switching transistor is connected to an external power source, and the PNP-type switching transistor is connected to ground; one end of the current-limiting resistor is connected with the driving chip, and the other end of the current-limiting resistor is connected with the base electrode of the NPN type switching triode and the base electrode of the PNP type switching triode.
4. The inverter driving circuit for a high-speed air compressor of a fuel cell vehicle according to claim 1, wherein the rear stage driving output module includes a bi-directional zener diode, a second capacitor and a pull-down resistor,
the bidirectional voltage stabilizing diode is used for preventing the grid of the IGBT module from being damaged due to overhigh voltage, the second capacitor is used for filtering, the pull-down resistor is used for reducing adverse effects caused by parasitic capacitance, and the bidirectional voltage stabilizing diode, the second capacitor and the pull-down resistor are connected between the amplifying module and the ground in parallel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921236565.4U CN210201706U (en) | 2019-08-01 | 2019-08-01 | Inverter driving circuit for high-speed air compressor of fuel cell automobile |
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| CN201921236565.4U CN210201706U (en) | 2019-08-01 | 2019-08-01 | Inverter driving circuit for high-speed air compressor of fuel cell automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492723A (en) * | 2019-08-01 | 2019-11-22 | 北京稳力科技有限公司 | A kind of fuel cell car high speed air compressor inverter driving circuit |
| CN117155078A (en) * | 2023-10-30 | 2023-12-01 | 江苏天合储能有限公司 | Control circuit and control method of power module and power module |
-
2019
- 2019-08-01 CN CN201921236565.4U patent/CN210201706U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492723A (en) * | 2019-08-01 | 2019-11-22 | 北京稳力科技有限公司 | A kind of fuel cell car high speed air compressor inverter driving circuit |
| CN117155078A (en) * | 2023-10-30 | 2023-12-01 | 江苏天合储能有限公司 | Control circuit and control method of power module and power module |
| CN117155078B (en) * | 2023-10-30 | 2024-01-30 | 江苏天合储能有限公司 | Control circuit and control method of power module and power module |
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