CN113037058A - SiC power device driving device and traction system - Google Patents
SiC power device driving device and traction system Download PDFInfo
- Publication number
- CN113037058A CN113037058A CN201911343396.9A CN201911343396A CN113037058A CN 113037058 A CN113037058 A CN 113037058A CN 201911343396 A CN201911343396 A CN 201911343396A CN 113037058 A CN113037058 A CN 113037058A
- Authority
- CN
- China
- Prior art keywords
- circuit
- power device
- driving
- sic power
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
- H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The SiC power device driving device comprises a voltage conversion circuit, a digital driving circuit and a switch circuit, wherein the voltage conversion circuit is used for carrying out voltage conversion on a power supply voltage provided by a traction control unit to generate a first driving voltage for driving the SiC power device to be switched on and a second driving voltage for driving the SiC power device to be switched off. The digital driving circuit controls the first switch or the second switch to be conducted according to a driving control signal input by the traction control unit. According to the SiC power device driving device and the traction system provided by the invention, the digital driving circuit is arranged in the SiC power device driving device, so that the SiC power device can be driven to be switched on or switched off in a digital mode, the requirement of rapid switching of the SiC power device can be further met, the SiC power device driving device and the traction system can be applied to the field of rail transit traction, and the characteristics of high frequency and low loss of the SiC power device can be exerted.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a SiC power device driving device and a traction system.
Background
At present, the power equipment mainly adopts a current transformation system based on a silicon (Si) power device to provide a current transformation function for the power equipment. For example, a four-quadrant power unit formed by using Si power devices provides a rectification function for the power equipment, or an inverter power unit formed by using Si power devices provides variable-frequency and variable-voltage electric energy for the power equipment.
With the development requirements of high efficiency, energy conservation, green, low carbon and environmental protection at home and abroad, more and more power equipment (such as photovoltaic power generation, wind power generation, electric vehicles, rail transit and the like) have requirements for high-efficiency power energy conversion, and SiC power devices with the characteristics of high temperature resistance, high pressure resistance, high frequency and low loss are promoted to be produced. At present, application research of high-power SiC power devices is deeply developed in the field of rail transit traction, and the high-power SiC power devices have positive effects of improving system efficiency, reducing the volume and weight of a traction device and achieving high efficiency, energy conservation and environmental protection for rail transit. The working voltage of the high-power SiC power device can reach 3300V.
However, the conventional 3300V-class power device driving device adopts an analog driving mode, has a single driving resistance and a slow signal transmission speed, and cannot meet the requirement of a rapid switch of a SiC power device. Therefore, when the high-power SiC power device is applied to the field of rail transit traction, how to drive the high-power SiC power device is an urgent problem to be solved.
Disclosure of Invention
The embodiment of the invention provides a SiC power device driving device and a traction system, which can meet the requirement of rapid switching of SiC power devices.
In a first aspect, the present invention provides a SiC power device driving apparatus, including: the device comprises a voltage conversion circuit, a digital driving circuit and a switching circuit;
the first input end of the digital driving circuit is connected with the output end of a traction control unit, the first output end of the digital driving circuit is connected with a first switch of the switch circuit, the second output end of the digital driving circuit is connected with a second switch of the switch circuit, the input end of the voltage conversion circuit is connected with the power supply end of the traction control unit, the first output end of the voltage conversion circuit is connected with the driving end of a SiC power device of a traction converter through the first switch of the switch circuit, and the second output end of the voltage conversion circuit is connected with the driving end of the SiC power device through the second switch of the switch circuit;
the voltage conversion circuit is used for performing voltage conversion on the power supply voltage provided by the traction control unit to generate a first driving voltage and a second driving voltage, wherein the first driving voltage is used for driving the SiC power device to be switched on, and the second driving voltage is used for driving the SiC power device to be switched off;
and the digital driving circuit is used for controlling the first switch or the second switch to be conducted according to a driving control signal input by the traction control unit.
Optionally, the apparatus further comprises: the input end of the detection circuit is connected with the power end of the SiC power device, and the output end of the detection circuit is connected with the second input end of the digital driving circuit;
the detection circuit is used for detecting a current parameter when the SiC power device is conducted, wherein the current parameter is used for determining whether the SiC power device is short-circuited;
and the digital driving circuit is used for controlling the second switch to be conducted when the SiC power device is in short circuit.
Optionally, the current parameter is a current change rate;
the detection circuit is further used for determining whether the SiC power device is short-circuited or not according to the current change rate when the SiC power device is conducted.
Optionally, a third output end of the digital driving circuit is connected with an input end of the traction control unit;
and the digital driving circuit is also used for reporting the running state of the SiC power device to the traction control unit.
Optionally, the apparatus further comprises: and the photoelectric conversion circuit is positioned between the digital driving circuit and the traction control unit and is used for performing photoelectric conversion on signals transmitted between the digital driving circuit and the traction control unit.
Optionally, the voltage conversion circuit includes: a Direct current-Direct current converter (DC-DC) and a voltage regulating circuit;
the direct current-direct current converter is used for performing voltage conversion on the power supply voltage provided by the traction control unit and outputting a preset voltage to the voltage regulating circuit;
the voltage regulating circuit is used for regulating the preset voltage and outputting the first driving voltage and the second driving voltage.
Optionally, the dc-dc converter is further configured to electrically isolate the traction control unit from the traction converter.
Optionally, the first switch and the second switch are both metal-oxide semiconductor field effect transistors.
Optionally, the digital driving circuit includes a Field Programmable Gate Array (FPGA) chip.
In a second aspect, the present invention provides a traction system comprising: the SiC power device drive apparatus, the traction control unit, the traction converter of any one of the first aspect;
the traction converter comprises at least one SiC half-bridge module, wherein the SiC half-bridge module comprises at least two SiC power devices, and each SiC power device corresponds to one SiC power device driving device.
According to the SiC power device driving device and the traction system provided by the invention, the SiC power device driving device is provided with the digital driving circuit, so that the SiC power device can be driven to be switched on or switched off in a digital mode, the requirement of rapid switching of the SiC power device can be further met, the SiC power device can be applied to the field of rail transit traction, and the characteristics of high frequency and low loss of the SiC power device can be exerted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a SiC power device driving apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another SiC power device driving apparatus provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another SiC power device driving apparatus provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a traction system according to an embodiment of the present invention.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
At present, application research of high-power SiC power devices is deeply developed in the field of rail transit traction, and the high-power SiC power devices have positive effects of improving system efficiency, reducing the volume and weight of a traction device and achieving high efficiency, energy conservation and environmental protection for rail transit. The working voltage of the high-power SiC power device can reach 3300V. However, the conventional 3300V-class power device driving device adopts an analog driving mode, has a single driving resistance and a slow signal transmission speed, and cannot meet the requirement of a rapid switch of a SiC power device. Therefore, when the high-power SiC power device is applied to the field of rail transit traction, how to drive the high-power SiC power device is an urgent problem to be solved.
In view of the above problems, the present invention provides a SiC power device driving apparatus, which can drive a SiC power device to turn on or off in a digital manner through a digital driving circuit, so as to meet the requirement of a rapid switch of the SiC power device, and can be applied to the field of rail transit traction to exert the characteristics of high frequency and low loss.
It should be understood that the SiC power device driving apparatus provided by the present invention can be used not only in a scenario of driving a high-power SiC power device, but also in a scenario of driving other SiC power devices. That is, the SiC power device driving apparatus according to the present invention does not limit the operating voltage of the SiC power device. In addition, the SiC power device driving device provided by the invention can be applied to the field of rail transit traction and can also be applied to other scenes using SiC power devices at will. In order to facilitate understanding of the SiC power device driving apparatus, the following embodiments are described by taking an example of applying the SiC power device to the traction field.
The SiC power device driving apparatus according to the embodiment of the present invention will be described in detail below with reference to specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a schematic structural diagram of a driving apparatus for a SiC power device according to an embodiment of the present invention, and as shown in fig. 1, the driving apparatus includes: the circuit comprises a voltage conversion circuit, a digital driving circuit and a switch circuit.
The first input end of the digital driving circuit is connected with the output end of a traction control unit, the first output end of the digital driving circuit is connected with a first switch of the switch circuit, the second output end of the digital driving circuit is connected with a second switch of the switch circuit, the input end of the voltage conversion circuit is connected with the power supply end of the traction control unit, the first output end of the voltage conversion circuit is connected with the driving end of a SiC power device of the traction converter through the first switch of the switch circuit, and the second output end of the voltage conversion circuit is connected with the driving end of the SiC power device through the second switch of the switch circuit.
The voltage conversion circuit is configured to perform voltage conversion on a power supply voltage provided by the traction control unit to generate a first driving voltage and a second driving voltage, where the first driving voltage is used to drive the SiC power device to be turned on, and the second driving voltage is used to drive the SiC power device to be turned off.
In some embodiments, the first driving voltage may also be referred to as a high level voltage or an on voltage, and the second driving voltage may also be referred to as a low level voltage or an off voltage. It should be understood that the high level voltage referred to herein is relative to the second drive voltage. Regarding the magnitudes of the first driving voltage and the second driving voltage, it may be determined according to the on-voltage and the off-voltage of the SiC power device. For example, assuming that the power supply voltage provided by the traction control unit is 36V, the on-voltage of the SiC power device is 15V, and the off-voltage is-10V, the voltage conversion circuit may convert the voltage of 36V into a first driving voltage of 15V and a second driving voltage of-10V, respectively, and provide the first driving voltage and the second driving voltage to the switching circuit.
And the digital driving circuit is used for controlling the first switch or the second switch to be conducted according to a driving control signal input by the traction control unit.
For example, after short pulse suppression, over-frequency protection, fault detection and the like are performed on a driving control signal, the digital driving circuit may control the first switch or the second switch of the switching circuit to be turned on based on the driving control signal, and apply an appropriate driving voltage to a driving end (e.g., a gate-emitter) of the SiC power device through the driving end to control the switching of the SiC power device, so as to fully utilize the characteristics of the SiC power device such as high frequency and low loss.
For example, when the drive control signal input by the traction control unit is used for controlling the SiC power device to be turned on, the digital drive circuit may control the first switch of the switch circuit to be turned on, so that the first drive voltage output by the voltage conversion circuit is transmitted to the drive end of the SiC power device through the turned-on first switch to drive the SiC power device of the traction converter to be turned on. When the SiC power device of the traction converter is conducted, the SiC power device and other SiC power devices of the traction converter are cooperated to provide traction force for equipment (such as a railway vehicle) where the traction converter is located so as to push the equipment to move forwards or backwards. In this implementation, the second switch is in an off state, and at this time, the second driving voltage output by the voltage conversion circuit is not transmitted to the SiC power device through the second switch.
When the drive control signal input by the traction control unit is used for controlling the SiC power device to be turned off, the digital drive circuit can control the second switch of the switch circuit to be turned on, so that the second drive voltage output by the voltage conversion circuit is transmitted to the drive end of the SiC power device through the turned-on second switch, and the SiC power device of the traction converter is driven to be turned off. In this implementation, the first switch is in an off state, and at this time, the first driving voltage output by the voltage conversion circuit is not transmitted to the SiC power device through the first switch.
It should be understood that the digital driving circuit according to the present embodiment may drive the SiC power device by using a digital driving method. For example, the digital driving circuit may include an FPGA chip, and a peripheral circuit of the FPGA chip; or, a Complex Programmable Logic Device (CPLD) chip, and a peripheral circuit of the CPLD chip; or the system comprises a singlechip, a peripheral circuit of the singlechip and the like. Compared with an analog driving mode, the digital driving mode can drive the SiC power device more quickly, and the requirement of quick switching of the SiC power device can be met.
The present embodiment does not limit the manner in which the digital driving circuit controls the first switch and the second switch to be turned on, for example, the digital driving circuit may control the first switch and the second switch by a voltage. For example, when the digital driving circuit needs to control the first switch to be turned on, the digital driving circuit may input a turn-on voltage to the first switch and input a turn-off voltage to the second switch. When the digital driving circuit needs to control the second switch to be turned on, the digital driving circuit can input a turn-on voltage to the second switch and input a turn-off voltage to the first switch. In this implementation, the first switch and the second switch may be any one of the following, for example: a triode, or a metal-oxide semiconductor field effect transistor.
With continued reference to fig. 1, optionally, in some embodiments, the third output of the digital driver circuit is coupled to the input of the traction control unit. And the digital driving circuit is also used for reporting the running state of the SiC power device to the traction control unit. In this way, a user at the traction control unit can be informed of the operating state of the SiC power device in time.
With continued reference to fig. 1, optionally, in some embodiments, the SiC power device driving apparatus may further include: a photoelectric conversion circuit.
The photoelectric conversion circuit is positioned between the digital driving circuit and the traction control unit and is used for performing photoelectric conversion on signals transmitted between the digital driving circuit and the traction control unit.
For example, the traction control unit is connected to a photoelectric conversion circuit through an optical fiber, and the photoelectric conversion circuit is connected to a digital drive circuit through a cable. In this scenario, the photoelectric conversion circuit may convert the driving control signal sent by the traction control unit into an electrical signal, and then send the electrical signal to the digital driving circuit. Correspondingly, the photoelectric conversion circuit converts the running state of the SiC power device reported by the digital driving circuit into an optical signal and then sends the optical signal to the traction control unit.
Through the mode, on one hand, signal interconnection is achieved, and on the other hand, the influence of interference signals is reduced to the maximum extent.
According to the SiC power device driving device provided by the invention, the SiC power device driving device is provided with the digital driving circuit, so that the SiC power device can be driven to be switched on or switched off in a digital mode, the requirement of rapid switching of the SiC power device can be further met, the SiC power device driving device can be applied to the field of rail transit traction, and the characteristics of high frequency and low loss of the SiC power device driving device are exerted.
Fig. 2 is a schematic structural diagram of another SiC power device driving apparatus according to an embodiment of the present invention. As shown in fig. 2, in addition to the driving apparatus shown in fig. 1, the driving apparatus may further include: a detection circuit.
The input end of the detection circuit is connected with the power end of the SiC power device, and the output end of the detection circuit is connected with the second input end of the digital driving circuit.
The detection circuit is used for detecting a current parameter when the SiC power device is conducted, and the current parameter is used for determining whether the SiC power device is short-circuited.
And the digital driving circuit is used for controlling the second switch to be conducted when the SiC power device is in short circuit, so that the SiC power device is protected from being damaged.
Taking the current parameter as an example of the current value, in this implementation, the detection circuit may send the detected current value to the digital driving circuit after detecting the current value when the SiC power device is turned on. The digital driving circuit can judge whether the SiC power device is short-circuited according to the magnitude of the current value.
For example, when the current value is greater than the set corresponding threshold value, it indicates that the SiC power device is short-circuited. Otherwise, the SiC power device is not short-circuited. Or, the digital driving circuit can obtain the current value change rate in a period of time based on the current value in the period of time, and when the change rate is greater than a set corresponding speed threshold value, the short circuit of the SiC power device is indicated. Otherwise, the SiC power device is not short-circuited.
In this implementation, the detection circuit may be any circuit capable of detecting current.
Taking the current parameter as the current change rate as an example, in this implementation, the detection circuit may obtain the current value change rate for a period of time based on the current value detected for the period of time. The detection circuit may then send the rate of change of the current value to the digital drive circuit, which determines whether the SiC power device is shorted based on the rate of change of the current value. Or, the detection circuit can automatically judge whether the SiC power device is short-circuited based on the current value change rate, and finally sends the result of whether the SiC power device is short-circuited to the digital driving circuit. The method for determining the short circuit based on the current value change rate can be referred to the foregoing description, and is not repeated. For example, the detection circuit may output a voltage signal indicative of the rate of change of the current value to the digitizing drive circuit to transmit the rate of change of the current value to the digitizing drive circuit.
Since the current change rate can reflect the change trend, namely the rising or falling trend, in some embodiments, whether the short circuit occurs can be accurately identified based on the current change rate, or whether the short circuit trend exists is pre-judged in advance, so that the short circuit protection method has the effects of quick response and advanced protection of short circuit protection, and the reliability of short circuit protection is improved. The SiC power device has good short-circuit protection effect particularly for short-circuit endurance time.
In this embodiment, when the SiC power device is turned on, the detection circuit detects a current parameter of the SiC power device when the SiC power device is turned on, and when the SiC power device is short-circuited, the digital driving circuit controls the SiC power device to be turned off, so that the SiC power device is protected from being damaged. In some embodiments, when the SiC power device is short-circuited, the digital driving circuit may rapidly (e.g., within 2 microseconds) and reliably turn off the SiC power device through a control strategy of internal soft turn-off, for example, so as to complete reliable driving and protection of the SiC power device.
It should be understood that when the digital driving circuit receives a control signal from the traction control unit for instructing the digital driving circuit to drive the SiC power device to turn on, if the SiC power is determined to be short-circuited at this time, the digital driving circuit ignores the control signal and performs an operation of controlling the SiC power device to turn off, so as to protect the SiC power device.
Fig. 3 is a schematic structural diagram of another SiC power device driving apparatus according to an embodiment of the present invention, and as shown in fig. 3, on the basis of the SiC power device driving apparatus shown in fig. 1 or 2, the voltage conversion circuit may include: a DC-DC converter and a voltage regulating circuit. Fig. 3 is an illustration based on fig. 2. It should be understood that only the one shown in fig. 1 may be used, and the description thereof is omitted.
The direct current-direct current converter is used for performing voltage conversion on the power supply voltage provided by the traction control unit and outputting preset voltage to the voltage regulating circuit.
The voltage regulating circuit is used for regulating the preset voltage and outputting the first driving voltage and the second driving voltage. It should be understood that the voltage regulating circuit may be any circuit capable of having a voltage regulation function. For example, a circuit provided with a variable resistor.
Currently, SiC power devices of different voltage classes require different drive voltages (i.e., on-voltage and/or off-voltage). For example, the turn-on voltage is between 15V and 20V, and the turn-off voltage is between-5V and-10V. Illustratively, the required turn-on voltage for one voltage class of SiC power device is 15V and the turn-off voltage is-10V, and the required turn-on voltage for another voltage class of SiC power device is 20V, the turn-off voltage is-5V, and so on.
In view of this problem, in the embodiment of the present invention, the preset voltage output by the dc-dc converter may be adjusted by the voltage adjusting circuit, so that the voltage of the first driving voltage and the voltage of the second driving voltage input to the switching circuit satisfy the requirement of the SiC power device connected thereto.
For example, the traction control unit provides a voltage of 9V-36V, the required on-voltage of the SiC power device is 15V, the required off-voltage is-10V, the direct current converter converts a power supply of 9V-36V provided by the traction control unit into DC24V, and outputs the DC24V to the voltage regulating circuit, and the voltage regulating circuit can convert the DC24V power supply into a first driving voltage of DC15V and a second driving voltage of DC-10V.
By the mode, the SiC power device driving device has a wider voltage input range and a wider voltage output range, so that the SiC power device driving device can be adapted to SiC power devices with different voltage grades, and the compatibility of the SiC power device driving device is higher.
Optionally, in some embodiments, the dc-dc converter may be further configured to electrically isolate the traction control unit from the traction converter.
The digital driving circuit is an intermediate bridge of the traction control unit and the SiC power device, the SiC power device of the traction converter usually works in a high-voltage converter system of several kilovolts, and if the reference ground of the digital driving circuit is connected with the main power E pole of the SiC device, the traction control unit and the traction converter can be electrically isolated through the direct current converter with the isolation function, so that the influence of the high-voltage system where the SiC power device connected with the digital driving circuit is located on the normal operation of the traction control unit circuit is avoided. I.e. to ensure an effective isolation of the high voltage side of the power unit from the low voltage side of the control unit. The structure can be applied to the scene of high power so as to ensure the safety of the traction control unit. In some embodiments, the electrical isolation may also be described as electrically isolating the drive control signal from the drive voltage driving the SiC power device, so that the dc-dc converter may also ensure isolation of the traction control unit from the drive voltage (i.e., the first drive voltage and the second drive voltage) when the SiC power device is shorted, and the like.
Fig. 4 is a schematic structural diagram of a traction system according to an embodiment of the present invention, and as shown in fig. 4, the traction system includes: a SiC power device drive, a traction control unit, a traction converter as described in any of fig. 1-3;
the traction converter comprises at least one SiC half-bridge module, wherein the SiC half-bridge module comprises two SiC power devices, and each SiC power device corresponds to one SiC power device driving device. In some embodiments, the SiC half-bridge module may also be referred to as a half-bridge packaged full SiC power device.
In the present embodiment, each SiC power device corresponds to one SiC power device driving apparatus. That is, each SiC power device needs to be driven by one SiC power device driving apparatus. As a possible implementation manner, a dual-channel design manner may be adopted, and the SiC power device driving apparatus for driving the full SiC power device packaged in the half-bridge structure is designed on the same driving board, so as to drive the full SiC power device packaged in the half-bridge structure. Such as the arrangement of the SiC power device driving apparatus shown in fig. 4.
In this implementation, the traction control unit may supply power to the voltage conversion circuit on the SiC power device driving apparatus designed on the same driving board through one power supply module thereon. That is, the voltage conversion circuits on the two SiC power device driving apparatuses on the same driving board may be connected to the same power supply terminal of the traction control unit. In another implementation manner, the traction control unit may also supply power to the voltage conversion circuits on the two SiC power device driving apparatuses through two power supply modules, which is not limited herein. Fig. 4 is a schematic diagram illustrating power supply terminals of two power supply modules.
For the operation principle of the traction system, reference may be made to the above description of the SiC power device driving apparatus, and details thereof are not repeated here.
On the other hand, the embodiment of the invention also provides electric equipment, and the electric equipment can comprise the SiC power device driving device.
In still another aspect, the present invention further provides an electric power device, which may include the above-mentioned traction system.
It should be understood that, although the above embodiments all use a traction scenario as an example to exemplify the SiC power device driving apparatus provided by the embodiments of the present invention. However, it will be understood by those skilled in the art that the SiC power device driving apparatus can also be applied to any other scenario using SiC power devices. In this scenario, the source of the driving control signal received by the SiC power device driving apparatus may be determined according to an actual situation, and accordingly, a function executed when the SiC power device driving apparatus drives the SiC power device to be turned on may also be determined according to the actual situation, which is not described herein again.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. An SiC power device driving apparatus, characterized by comprising: the device comprises a voltage conversion circuit, a digital driving circuit and a switching circuit;
the first input end of the digital driving circuit is connected with the output end of a traction control unit, the first output end of the digital driving circuit is connected with a first switch of the switch circuit, the second output end of the digital driving circuit is connected with a second switch of the switch circuit, the input end of the voltage conversion circuit is connected with the power supply end of the traction control unit, the first output end of the voltage conversion circuit is connected with the driving end of a SiC power device of a traction converter through the first switch of the switch circuit, and the second output end of the voltage conversion circuit is connected with the driving end of the SiC power device through the second switch of the switch circuit;
the voltage conversion circuit is used for performing voltage conversion on the power supply voltage provided by the traction control unit to generate a first driving voltage and a second driving voltage, wherein the first driving voltage is used for driving the SiC power device to be switched on, and the second driving voltage is used for driving the SiC power device to be switched off;
and the digital driving circuit is used for controlling the first switch or the second switch to be conducted according to a driving control signal input by the traction control unit.
2. The apparatus of claim 1, further comprising: the input end of the detection circuit is connected with the power end of the SiC power device, and the output end of the detection circuit is connected with the second input end of the digital driving circuit;
the detection circuit is used for detecting a current parameter when the SiC power device is conducted, wherein the current parameter is used for determining whether the SiC power device is short-circuited;
and the digital driving circuit is used for controlling the second switch to be conducted when the SiC power device is in short circuit.
3. The apparatus of claim 2, wherein the current parameter is a rate of change of current;
the detection circuit is further used for determining whether the SiC power device is short-circuited or not according to the current change rate when the SiC power device is conducted.
4. The apparatus of claim 1, wherein a third output of the digitizing drive circuit is coupled to an input of the traction control unit;
and the digital driving circuit is also used for reporting the running state of the SiC power device to the traction control unit.
5. The apparatus of claim 4, further comprising: and the photoelectric conversion circuit is positioned between the digital driving circuit and the traction control unit and is used for performing photoelectric conversion on signals transmitted between the digital driving circuit and the traction control unit.
6. The apparatus of claim 1, wherein the voltage conversion circuit comprises: a DC-DC converter and a voltage regulating circuit;
the direct current-direct current converter is used for performing voltage conversion on the power supply voltage provided by the traction control unit and outputting a preset voltage to the voltage regulating circuit;
the voltage regulating circuit is used for regulating the preset voltage and outputting the first driving voltage and the second driving voltage.
7. The apparatus of claim 6, wherein the DC-DC converter is further configured to electrically isolate the traction control unit from the traction converter.
8. The apparatus of claim 1, wherein the first switch and the second switch are both metal-oxide-semiconductor field effect transistors.
9. The apparatus of claim 1, wherein the digitizing driver circuit comprises a Field Programmable Gate Array (FPGA) chip.
10. A traction system, characterized in that it comprises: the SiC power device drive apparatus, the traction control unit, the traction converter of any one of claims 1 to 9;
the traction converter comprises at least one SiC half-bridge module, wherein the SiC half-bridge module comprises two SiC power devices, and each SiC power device corresponds to one SiC power device driving device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911343396.9A CN113037058A (en) | 2019-12-24 | 2019-12-24 | SiC power device driving device and traction system |
| PCT/CN2020/135833 WO2021129421A1 (en) | 2019-12-24 | 2020-12-11 | Drive apparatus for sic power device, and traction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911343396.9A CN113037058A (en) | 2019-12-24 | 2019-12-24 | SiC power device driving device and traction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113037058A true CN113037058A (en) | 2021-06-25 |
Family
ID=76451313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911343396.9A Pending CN113037058A (en) | 2019-12-24 | 2019-12-24 | SiC power device driving device and traction system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113037058A (en) |
| WO (1) | WO2021129421A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023165218A1 (en) * | 2022-03-04 | 2023-09-07 | 中车永济电机有限公司 | Driving apparatus and device for silicon carbide (sic) power device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6977469B2 (en) * | 2017-10-18 | 2021-12-08 | 富士電機株式会社 | Silicon Carbide MOSFET Inverter Circuit |
| CN109061431B (en) * | 2018-08-22 | 2020-11-13 | 徐州中矿大传动与自动化有限公司 | Grid charge-based SiC MOSFET grid fault diagnosis system and diagnosis method |
| CN109240408B (en) * | 2018-10-31 | 2020-09-25 | 西安理工大学 | SicMOSFET gate drive voltage control circuit and control method thereof |
| CN109495102B (en) * | 2018-12-05 | 2024-03-19 | 江苏国传电气有限公司 | SiC MOSFET class short-circuit current suppression circuit and method |
| CN110271424A (en) * | 2019-06-28 | 2019-09-24 | 中车青岛四方车辆研究所有限公司 | Draw inversion system and its control method |
-
2019
- 2019-12-24 CN CN201911343396.9A patent/CN113037058A/en active Pending
-
2020
- 2020-12-11 WO PCT/CN2020/135833 patent/WO2021129421A1/en active Application Filing
Non-Patent Citations (2)
| Title |
|---|
| 张经纬等: "基于ＰＣＢ罗氏线圈的SiC MOSFET短路保护研究", 《电力电子技术》 * |
| 高勇等: "SiC MOSFET的短路特性", 《半导体器件》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023165218A1 (en) * | 2022-03-04 | 2023-09-07 | 中车永济电机有限公司 | Driving apparatus and device for silicon carbide (sic) power device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021129421A1 (en) | 2021-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211930609U (en) | SiC MOSFET short-circuit protection circuit based on short-circuit current suppression | |
| CN103036415B (en) | Power semiconductor switch series circuit and control method thereof | |
| CN107026638B (en) | IGBT driving device and driving method | |
| US11070046B2 (en) | Short-circuit protection circuit for self-arc-extinguishing type semiconductor element | |
| CN101820276B (en) | Control method and the gate drivers of IGBT | |
| CN104467370A (en) | Soft shutdown for isolated drivers | |
| WO2011121765A1 (en) | Electric power conversion device and surge voltage reduction method | |
| WO2013174137A1 (en) | Drive circuit of insulated gate bipolar transistor | |
| CN102969918B (en) | Three-phase bridge type converter system and promptly descend short-circuit protection circuit | |
| US8503146B1 (en) | Gate driver with short-circuit protection | |
| CN103548266A (en) | Method and apparatus for operating a power output stage | |
| CN110572011B (en) | IGBT drive circuit soft switching device with short-circuit protection | |
| JP4442348B2 (en) | Power converter | |
| CN103546020A (en) | High-voltage IGBT driving and protecting circuit | |
| CN105720802A (en) | H bridge full-function IGBT isolation driving control module | |
| US20220263404A1 (en) | Active discharge of an electric drive system | |
| CN108400780B (en) | Power semiconductor device driving device and system with data acquisition function | |
| CN113037058A (en) | SiC power device driving device and traction system | |
| US8829861B2 (en) | Power converter | |
| JP7322653B2 (en) | switch drive | |
| CN202565155U (en) | Insulated gate bipolar transistor driving circuit | |
| CN102594099A (en) | Grid drive circuit of intelligent power module | |
| CN107482894B (en) | Electric energy converter, power train comprising same and related electric transport vehicle | |
| CN113839653B (en) | SiC MOSFET driving circuit based on overcurrent protection of pure hardware device | |
| JP2020177875A (en) | Direct-current interrupting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210625 |