CN107508469B - General intelligent drive board of medium-high voltage IGBT - Google Patents
General intelligent drive board of medium-high voltage IGBT Download PDFInfo
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- CN107508469B CN107508469B CN201710896851.2A CN201710896851A CN107508469B CN 107508469 B CN107508469 B CN 107508469B CN 201710896851 A CN201710896851 A CN 201710896851A CN 107508469 B CN107508469 B CN 107508469B
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- 238000002955 isolation Methods 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 22
- 230000001052 transient effect Effects 0.000 claims description 11
- 239000013307 optical fiber Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 238000004891 communication Methods 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 abstract description 2
- 239000000306 component Substances 0.000 description 11
- 230000003137 locomotive effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
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- 239000008358 core component Substances 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Power Conversion In General (AREA)
Abstract
The invention discloses a general intelligent driving board for a medium-high voltage IGBT, which comprises an intelligent core board, a general adapter board and a general direct current power supply. When overhauling IGBT driving boards with different voltage classes and different models, the method can be realized by changing the connection mode of components or directly replacing the components on the adapting board; the intelligent core board adopts a universal circuit and a programmable gate drive resistor array, and only needs to update corresponding drive programs, so that the drive parameter configuration, communication protocol matching and fault information recording and uploading functions of different voltage classes and different types of IGBTs can be realized; the input and output of the universal direct current power supply is designed to be isolated by a high-voltage-resistant high-frequency transformer so as to meet the insulation requirements of different voltage classes and simultaneously be compatible with direct current and alternating current power supply modes. The method has the advantages that the whole driving plate does not need to be redeveloped during overhauling, the overhauling period of the current transformer and IGBT driving is shortened, and the overhauling cost of the current transformer is reduced.
Description
Technical Field
The invention relates to the technical field of alternating current driving, in particular to a general intelligent driving plate for a medium-high voltage IGBT.
Background
The traction converter system is used as a core component of a locomotive to carry the transmission of main power, and the power module or the component of the converter has higher failure probability due to the complex application site of the locomotive. Supply chain problems are often encountered in the repair and maintenance upgrades of high power converters, which are either not available or are very costly when spare parts are required. On the other hand, because the locomotive models are various and the current converter suppliers are complicated, the current converter overhaul scheme has no universality, and overhaul of each converter power module only becomes an individual case, and redesign and development are needed each time, so that the overhaul period is greatly prolonged, and the overhaul cost is increased.
With the increase of the service life of locomotives, challenges brought by replacement of IGBT modules and driving boards become the most major problems of locomotive maintenance and operation, and the maintenance cost and the usability of running locomotives are directly affected.
The concrete steps are as follows:
aiming at the IGBT with different voltage classes and different models, firstly, the electric characteristic requirements of the driving board are different due to the different voltage classes, and a hardware circuit of the driving board needs to be redesigned; secondly, different driving parameter configurations are needed for different IGBT device parameters and switching characteristics; therefore, the single drive board is difficult to be compatible, so that the development of the hardware and the software of the drive board is required to be carried out again in each case, and the development period is long and the cost is high.
Disclosure of Invention
The invention provides a general intelligent driving board for a medium-high voltage IGBT (insulated gate bipolar transistor) so as to overcome the technical problems.
The intelligent core board, at least one universal adapter board and a universal direct current power supply;
the intelligent core board is respectively connected with the universal adapter board and the universal direct current power supply;
the universal adapter plate includes: v (V) ce Voltage detection circuit and active clamp circuit, said V ce The voltage detection circuit is used for detecting the V of the IGBT ce The voltage carries out desaturation grading short-circuit protection on the IGBT, the active clamping circuit is used for inhibiting the voltage spike of the collector electrode of the IGBT, and the transient diode is used for carrying out overvoltage protection and sending the active clamping state to the intelligent core board;
the V is ce One end of the voltage detection circuit is connected with the collector electrode of the IGBT, the other end of the voltage detection circuit is connected with the voltage comparison circuit of the intelligent core board, one end of the active clamping circuit is connected with the collector electrode of the IGBT, and the other end of the active clamping circuit is connected with the gate electrode of the IGBT;
the V is ce The voltage detection circuit and the high voltage resistant part of the active clamp circuit are connected in series by adopting a plurality of groups of transient diodes; the connecting route of the transient diodes is a straight line or a broken line or a triangle formed by the straight line and the broken line.
Further, the input end of the universal direct current power supply is direct current voltage or alternating current voltage, the output end is voltage-stabilizing direct current, and the universal direct current power supply comprises:
a high voltage-resistant high frequency isolation transformer circuit and an output voltage control circuit;
one end of the high-voltage-resistant high-frequency isolation transformer circuit is connected with a direct current/alternating current power supply, the other end of the high-voltage-resistant high-frequency isolation transformer circuit is connected with the output voltage port control circuit, and the other end of the output voltage control circuit is connected with the intelligent core board.
Further, the high-voltage-resistant high-frequency isolation transformer circuit includes:
an H-bridge square wave modulation unit and an isolation transformer;
the H-bridge square wave modulation unit is connected with the primary side of the isolation transformer and is used for enabling the primary side and the secondary side of the isolation transformer to generate high-frequency square waves so as to reduce the volume of the transformer, and the isolation transformer is used for isolating high voltage between the input and the output of a power supply.
Further, the output voltage control circuit includes:
the diode does not control the rectifier bridge and the voltage stabilizing circuit;
the diode uncontrolled rectifier bridge is used for rectifying the alternating square wave voltage of the secondary side of the isolation transformer into direct current voltage, and the voltage stabilizing circuit is used for adjusting the direct current voltage into a target direct current voltage value through a closed loop of the step-up/step-down circuit.
Further, the intelligent core board includes: the optical fiber port, the FPGA logic chip, the output amplifying circuit, the programmable gate resistor array, the input/output interface and the peripheral circuit of the FPGA chip;
the FPGA chip is respectively connected with the output amplifying circuit, the programmable gate electrode resistor array, the input/output interface and the peripheral circuit, the other end of the output amplifying circuit is connected with the input end of the gate electrode resistor array, the other end of the programmable gate electrode resistor array is connected with the gate electrode of the IGBT, and the other end of the input/output interface is connected with the optical fiber transceiver.
Further, the peripheral circuit includes:
the power supply circuit, the detection signal input circuit, the fault output circuit, the alarm indication LED circuit and the clock circuit.
The universality and the intelligence of the high-voltage IGBT universal intelligent driving board are shown in the aspect that when the IGBTs with different voltage and current levels are driven, a circuit of the universal adapting board is not required to be redesigned.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of a general intelligent drive board structure of a high-voltage IGBT;
FIG. 2 is a schematic diagram of an interface of a high-voltage IGBT universal intelligent drive board;
FIG. 3 is a schematic block diagram of a generic DC power supply of the present invention;
FIG. 4 is a schematic diagram of a programmable gate resistor array of the present invention;
FIG. 5a is a schematic diagram of the circuit of the universal adapter board component of the present invention;
fig. 5b is another circuit schematic of the universal adapter board component of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a schematic diagram of a high-voltage IGBT universal intelligent driving board structure according to the present invention, as shown in fig. 1, the method of this embodiment may include:
a smart core board 101, at least one universal adapter board 102, and a universal dc power supply 103;
the intelligent core board is respectively connected with the universal adapter board and the universal direct current power supply;
the universal adapter plate includes: v (V) ce Voltage detection circuit and active clamp circuit, said V ce The voltage detection circuit is used for detecting the V of the IGBT ce The voltage carries out desaturation grading short-circuit protection on the IGBT, the active clamping circuit is used for inhibiting the voltage spike of the collector electrode of the IGBT, and the transient diode is used for carrying out overvoltage protection and sending the active clamping state to the intelligent core board;
the V is ce One end of the voltage detection circuit is connected with the collector electrode of the IGBT, the other end of the voltage detection circuit is connected with the voltage comparison circuit of the intelligent core board, one end of the active clamping circuit is connected with the collector electrode of the IGBT, and the other end of the active clamping circuit is connected with the gate electrode of the IGBT;
the V is ce The voltage detection circuit and the high voltage resistant part of the active clamp circuit are connected in series by adopting a plurality of groups of transient diodes; the connecting route of the transient diodes is a straight line or a broken line or a triangle formed by the straight line and the broken line.
Specifically, as shown in fig. 2, the definition and connection relationship of the ports of the smart core board 101, the universal adapter board 102, and the universal power board 103 are as follows: port 1 of the smart core board 101: control power input, port 2: fiber optic transceiver, port 3: detection signal and status signal input, port 4: IGBT power E utmost point connector, port 5: IGBT signal E utmost point connector, port 6: g-pole connection port of IGBT, port 7: and a C electrode connection port of the IGBT is 8 is an FPGA main chip.
Port 9 of universal adapter plate 102: detection signal and status signal inputs, port 10: g-pole connection port of IGBT, port 11: c-pole connection port of IGBT, port 12: IGBT power E utmost point connector, port 13: IGBT signal E pole connector.
Port 14 of the general power board 103: dc power input, port 15: ac power input, port 16: and controlling the power supply output.
The port 1 of the intelligent core board 101 is connected with the port 16 of the universal power board 103 to obtain a control power supply, the optical fiber port 2 receives a PWM signal from the converter control unit, and the PWM signal is processed by the main chip 8 (FPGA) to generate gate signals Vge which can drive the IGBT to the ports 5 and 6 (in practical application, the ports 4, 5, 6 and 7 of the board 101 are respectively connected with the ports 12, 13, 10 and 11 of the board 102, and then connected to the corresponding terminals of the IGBT). The port 3 of the intelligent core board 101 is a Vce signal and an active clamping signal obtained from the port 9 of the universal adapter board 102, and a driver in the FPGA adopts a corresponding logic algorithm according to the feedback signals to realize the functions of PWM signal transmission, IGBT protection and the like. For example: taking short-circuit protection as an example, when the detected Vce voltage exceeds a first threshold voltage, the first-stage desaturation short-circuit protection is operated, and when the detected Vce voltage exceeds a second threshold voltage, the second-stage desaturation short-circuit protection is adopted.
V of the adapter plate of the present embodiment ce The voltage detection circuit and the high voltage resistant part of the active clamp circuit are provided with a plurality of groups of transient diodes which are connected in series, and the connecting routes of the transient diodes are three types: the first is a straight line; the second is a folding line; and the third is a triangular circuit formed by the straight line and the folding line. The positions of components corresponding to the three circuits are all on the circuit board when the circuit board is prepared. When the method is suitable for IGBTs with different voltage levels, different circuit welding components are adopted. For example: the method is applied to the IGBT with the highest withstand voltage level, the straight line edge of the triangle formed by the straight line and the fold line is disconnected and not welded, the rest two sides of the triangle are connected in series, and finally, a serial structure of a W-shaped special line is formed to improve the withstand voltage capability; when the method is applied to the IGBT with low withstand voltage level, only linear side welding components with the triangular structure are selected, and the other two sides are vacant to form a linear series structure. As shown in fig. 5a and 5b, by different sides of the triangular structureThe series connection of the voltage-class IGBT is suitable for the electrical characteristic requirements of the IGBTs with different voltage classes, and the universality is excellent. Even if special conditions are met, the design of the adapting plate can be changed, and compared with the whole development of the driving plate, the method has great advantages in period and cost; therefore, the connection mode of the diode or TVS adopts a straight line and broken line delta structure, components are replaced by the connection mode in combination with the components, and the short-circuit protection and active clamping functions of IGBT driving of different voltage classes and different types are realized. Wherein fig. 5a is a broken line case, and fig. 5b is a straight line case, and broken line parts of the straight line and the broken line form a triangle structure together.
In addition, because the function is relatively single, the adapter plate can also be directly redesigned, and the development period is far less than that of the whole drive plate.
The embodiment will be V ce The voltage detection circuit and the active clamp circuit are concentrated on the adapter plate, so that the high-voltage circuits of the two circuits are all installed on the IGBT nearby, the electromagnetic interference resistance of the intelligent core plate and the adapter plate in the driving plate is improved, and reliable short-circuit protection and overvoltage suppression functions are realized. For IGBT of different models, reserving component space in design, and changing component connection mode or replacing component to match with IGBT of different voltage class.
In order to further facilitate parallel operation of a plurality of IGBTs, the adapting board of the embodiment adopts an expandable structure, that is, one intelligent core board is provided with a plurality of expansion adapting boards to drive a group of IGBTs which are connected in parallel. The signal terminals with the same function on the expansion adapter plate are connected in parallel through the multi-layer PCB wiring, and the signal connection from the expansion adapter plate to the intelligent core plate only needs one set of connecting wires, so that the complicated wiring when a plurality of IGBTs are connected in parallel is avoided.
Further, the intelligent core board includes: the optical fiber port, the FPGA logic chip, the output amplifying circuit, the programmable gate resistor array, the input/output interface and the peripheral circuit of the FPGA chip;
the FPGA chip is respectively connected with the output amplifying circuit, the programmable gate electrode resistor array, the input/output interface and the peripheral circuit, the other end of the output amplifying circuit is connected with the input end of the gate electrode resistor array, the other end of the programmable gate electrode resistor array is connected with the gate electrode of the IGBT, and the other end of the input/output interface is connected with the optical fiber transceiver.
Specifically, a special communication module is arranged in the FPGA chip program, and the FPGA chip program not only generates a normal PWM signal, but also has the protection functions of short circuit, overvoltage, overtemperature and the like. The communication module sets the following key parameters: the method comprises the steps of switching delay period, feedback signal logic selection (feedback signal logic comprises in-phase tracking, anti-phase tracking, pulse tracking and the like), protection signal logic selection (fault high, fault low, level and or the like), protection time sequence setting and the like, the key parameter values are directly changed according to different IGBT (insulated gate bipolar transistors) to be consistent with the protocol of the original converter, and the information codes are uploaded to a converter control unit through a feedback port in an optical fiber transceiver port to monitor the running state of the whole system, so that fault expansion is avoided, and the process of integrating a new driving plate on the existing converter control system is simplified to a great extent.
Intelligent core board 101 parameter configuration function: the driving characteristics are set according to IGBT parameters, main circuit working parameters and main circuit device parasitic parameters, so that the electrical characteristics of the driving plate and the IGBT module are optimized, and the requirements of good switching characteristics, protection characteristics, overvoltage limitation and the like are met in the original power module. The programmable gate resistor array is shown in fig. 4, wherein Gon is an IGBT on resistor array input port, goff is an IGBT off resistor array input port, G is an IGBT gate, the combination sequence of the on resistor array is controlled by the FPGA when the IGBT is on, and the combination sequence of the off resistor array is controlled when the IGBT is off, so as to optimize the on and off processes. The overvoltage impact is controlled, and the gate electrode of the drive board can be configured to turn off the resistor array through software, so that di/dt of the drive board when the drive board is used for switching a new IGBT is kept at a reasonable level; the turn-on resistor is adjusted to limit the reverse recovery peak energy of the diode to always be in the safe operating region of reverse recovery.
The programmable gate resistor array is configured at the output end of the intelligent core board output amplifying circuit, each resistor takes different resistance values, and the FPGA logic chip is used for combining and gating proper resistor series-parallel connection to obtain on-off resistors with different resistance values, so that the characteristic optimization of switch oscillation inhibition, switch loss, protection reliability and the like is realized; the full combination of the gate resistor arrays can obtain enough resistance values to adapt to the on and off characteristics of IGBTs with different voltage classes and different types, and when the IGBTs are replaced, the switching characteristic parameters such as gate resistor combination logic, switching sequence, protection logic and the like are only updated in the configuration program of the FPGA logic chip.
The intelligent core board circuit gate electrode resistor array redundancy and parameter programmable mode are utilized to realize the driving of IGBTs with different voltage classes and different types, and meanwhile, the flexibility of FPGA chip programming is utilized to realize the flexible matching with the communication protocol of an upper controller. The driving parameters can be programmed through the FPGA chip so as to conveniently optimize the driving performance. Meanwhile, the FPGA chip can perform fault classification, recording and uploading, has a real-time protection function and a fault diagnosis function, and realizes intelligent IGBT driving.
Further, the peripheral circuit includes:
the power supply circuit, the detection signal input circuit, the fault output circuit, the alarm indication LED circuit and the clock circuit.
Further, the input end of the universal direct current power supply is direct current voltage or alternating current voltage, the output end is voltage-stabilizing direct current, and the universal direct current power supply comprises:
a high voltage-resistant high frequency isolation transformer circuit and an output voltage control circuit;
one end of the high-voltage-resistant high-frequency isolation transformer circuit is connected with a direct current/alternating current power supply, the other end of the high-voltage-resistant high-frequency isolation transformer circuit is connected with the output voltage port control circuit, and the other end of the output voltage control circuit is connected with the intelligent core board.
Further, the high-voltage-resistant high-frequency isolation transformer circuit includes:
an H-bridge square wave modulation unit and an isolation transformer;
the H-bridge square wave modulation unit is connected with the primary side of the isolation transformer and is used for enabling the primary side and the secondary side of the isolation transformer to generate high-frequency square waves so as to reduce the volume of the transformer, and the isolation transformer is used for isolating high voltage between the input and the output of a power supply.
Further, the output voltage control circuit includes:
the diode does not control the rectifier bridge and the voltage stabilizing circuit;
the diode uncontrolled rectifier bridge is used for rectifying the alternating square wave voltage of the secondary side of the isolation transformer into direct current voltage, and the voltage stabilizing circuit is used for adjusting the direct current voltage into a target direct current voltage value through a closed loop of the step-up/step-down circuit.
Specifically, the universal direct current power supply of the embodiment is used for providing a power supply with a high-frequency transformer isolation function for the intelligent core board and the at least one universal adapter board. The power supply requirement of IGBT driving boards with 3300V, 4500V and 6500V voltage levels is met. Meanwhile, a power supply input interface of an alternating current 24V square wave power supply is reserved for different locomotive converters, namely, the input of a direct current power supply can be 24 V+/-10% direct current (compatible with 15VDC power supply) or 24 V+/-10% alternating current square wave power supply, so that the power supply is suitable for different locomotive control power supplies. As shown in fig. 3, the port A, B is a dc power input port, and the port C, D is an ac power input port.
(1) The direct current power supply is provided with a high-frequency transformer and a voltage control chip, and is packaged in an insulating shell so as to facilitate the installation of the direct current power supply in a power module without separately considering the electric insulation problem. The high-frequency transformer adopts an insulated voltage-resistant structure suitable for the IGBT (6500V grade) with the highest voltage grade at present, namely, the input and output of a direct-current power supply can meet the requirements of the IGBT electrical characteristics with different voltage grades commonly seen in the market. That is, since the direct current power supply is individually taken out and packaged as an independent circuit board, which is installed at a position far from the IGBT, and is not very sensitive to the structural layout directly installed on the IGBT like the adapter board, it can be directly designed as a highest withstand voltage class circuit, and is commonly used for the respective withstand voltage classes below.
The voltage stabilizing control of the output direct-current voltage is placed on the secondary side of the isolation transformer, namely, the secondary side is provided with an uncontrolled rectifier bridge and a voltage stabilizing chip to carry out closed-loop regulation to obtain the required direct-current voltage output, and the primary side of the transformer is controlled only by square wave modulation (H bridge open-loop square wave modulation) to modulate the direct-current power into a high-frequency square wave;
(2) In order to be compatible with power supply sources (direct current power supply or high-frequency square wave power supply) of different vehicle types, the invention is provided with an alternating current input interface, namely a modulator bypassing the primary side of the transformer during alternating current input, the high-frequency square wave is directly added to the primary side input end of the transformer, and rectification and voltage stabilization control is carried out on the secondary side of the transformer.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (5)
1. The utility model provides a general intelligent drive plate of medium-high voltage IGBT which characterized in that includes:
the intelligent core board, at least one universal adapter board and a universal direct current power supply;
the intelligent core board is respectively connected with the universal adapter board and the universal direct current power supply;
the universal adapter plate includes: v (V) ce Voltage detection circuit and active clamp circuit, said V ce The voltage detection circuit is used for detecting the V of the IGBT ce The voltage carries out desaturation grading short-circuit protection on the IGBT, the active clamping circuit is used for inhibiting the voltage spike of the collector electrode of the IGBT, and the transient diode is used for carrying out overvoltage protection and sending the active clamping state to the intelligent core board;
the V is ce One end of the voltage detection circuit is connected with the collector electrode of the IGBT, the other end of the voltage detection circuit is connected with the voltage comparison circuit of the intelligent core board, one end of the active clamping circuit is connected with the collector electrode of the IGBT, and the other end of the active clamping circuit is connected with the gate electrode of the IGBT;
the V is ce Voltage detection circuit and circuitThe high voltage resistant parts of the active clamp circuits are all connected in series by adopting a plurality of groups of transient diodes; the connecting route of the transient diodes is a straight line or a broken line or a triangle formed by the straight line and the broken line;
the intelligent core board includes: the optical fiber interface comprises an optical fiber port, an FPGA logic chip, an output amplifying circuit, a programmable gate resistor array, an input/output interface and a peripheral circuit of the FPGA logic chip;
the FPGA logic chip is respectively connected with the output amplifying circuit, the programmable gate electrode resistor array, the input/output interface and the peripheral circuit, the other end of the output amplifying circuit is connected with the input end of the gate electrode resistor array, the other end of the programmable gate electrode resistor array is connected with the gate electrode of the IGBT, and the other end of the input/output interface is connected with the optical fiber transceiver.
2. The IGBT universal intelligent drive board of claim 1 wherein the input of the universal dc power supply is dc voltage or ac voltage and the output is regulated dc, the universal dc power supply comprising:
a high voltage-resistant high frequency isolation transformer circuit and an output voltage control circuit;
one end of the high-voltage-resistant high-frequency isolation transformer circuit is connected with a direct current/alternating current power supply, the other end of the high-voltage-resistant high-frequency isolation transformer circuit is connected with the output voltage port control circuit, and the other end of the output voltage control circuit is connected with the intelligent core board.
3. The IGBT universal intelligent drive board according to claim 2, wherein the high voltage tolerant high frequency isolation transformer circuit comprises:
an H-bridge square wave modulation unit and an isolation transformer;
the H-bridge square wave modulation unit is connected with the primary side of the isolation transformer and is used for enabling the primary side and the secondary side of the isolation transformer to generate high-frequency square waves so as to reduce the volume of the transformer, and the isolation transformer is used for isolating high voltage between the input and the output of a power supply.
4. The IGBT universal intelligent drive board of claim 3 wherein the output voltage control circuit comprises:
the diode does not control the rectifier bridge and the voltage stabilizing circuit;
the diode uncontrolled rectifier bridge is used for rectifying the alternating square wave voltage of the secondary side of the isolation transformer into direct current voltage, and the voltage stabilizing circuit is used for adjusting the direct current voltage into a target direct current voltage value through a closed loop of the step-up/step-down circuit.
5. The IGBT universal intelligent drive board according to any one of claims 1 to 4, wherein the peripheral circuit comprises:
the power supply circuit, the detection signal input circuit, the fault output circuit, the alarm indication LED circuit and the clock circuit.
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| CN110568782B (en) * | 2018-06-06 | 2021-05-25 | 佛山市顺德区美的电热电器制造有限公司 | Method and device for configuring driving parameters of driving chip |
| CN112105110A (en) * | 2020-09-12 | 2020-12-18 | 深圳市维盛泰光电有限公司 | Multipurpose two-wire drive circuit |
| CN112731093B (en) * | 2020-12-14 | 2024-04-19 | 中车永济电机有限公司 | High-power IGBT adaptation method |
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| CN104935315B (en) * | 2015-07-15 | 2019-02-19 | 北京京东方能源科技有限公司 | IGBT drive circuit |
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