CN112332640B - IGBT drive circuit and IGBT circuit - Google Patents
IGBT drive circuit and IGBT circuit Download PDFInfo
- Publication number
- CN112332640B CN112332640B CN202011163896.7A CN202011163896A CN112332640B CN 112332640 B CN112332640 B CN 112332640B CN 202011163896 A CN202011163896 A CN 202011163896A CN 112332640 B CN112332640 B CN 112332640B
- Authority
- CN
- China
- Prior art keywords
- resistor
- diode
- capacitor
- pin
- twenty
- 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.)
- Active
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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Power Conversion In General (AREA)
Abstract
The invention discloses an IGBT (insulated gate bipolar transistor) driving circuit and an IGBT circuit, which comprise an upper bridge driving circuit and a lower bridge driving circuit, wherein the lower bridge driving circuit provides positive voltage through a first positive voltage providing end to drive a lower bridge arm IGBT to be switched on, and then provides negative voltage through a first negative voltage providing end to drive the lower bridge arm IGBT to be switched off rapidly.
Description
Technical Field
The invention relates to the technical field of IGBT drive control, in particular to an IGBT drive circuit and an IGBT circuit.
Background
The IGBT is a composite fully-controlled voltage-driven power semiconductor device composed of BJT (Bipolar Transistor) and MOS (Insulated Gate field effect Transistor). The converter has the advantages of small driving power, low saturation conducting voltage and the like, so that the converter is very suitable for the fields of converter systems with the direct-current voltage of 600V or more, such as alternating-current motors, frequency converters, switching power supplies, lighting circuits, traction transmission and the like. The design of the IGBT driving circuit is crucial to the application of the IGBT, and most of the existing common IGBT driving circuits are bootstrap-driven and zero-voltage turn-off. In the mode, negative pressure is not turned off, and the existence of the Miller capacitors causes the straight-through condition of upper and lower bridge arms in the GBT full-bridge circuit, so that the working reliability of the IGBT circuit is reduced.
Disclosure of Invention
The invention aims to provide an IGBT driving circuit and an IGBT circuit, and solves the problem that upper and lower bridge arms in the IGBT circuit are directly communicated.
According to a first aspect, an embodiment provides an IGBT driving circuit comprising:
the lower bridge driving circuit is used for transmitting the current output by the first positive voltage providing end to the output end of the lower bridge driving circuit in the forward direction so as to drive the IGBT of the lower bridge arm to be conducted; or reversely transmitting the current output by the output end of the lower bridge driving circuit to a first negative voltage providing end so as to drive the IGBT of the lower bridge arm to be switched off;
the upper bridge driving circuit comprises a first capacitor and a second capacitor, and is used for charging the first capacitor and transmitting the current in the fully charged first capacitor to the output end of the upper bridge driving circuit so as to drive the upper bridge arm IGBT to be conducted, wherein the first capacitor is charged through the first positive voltage supply end; or the second capacitor is charged, and the current output by the output end of the upper bridge driving circuit is reversely transmitted to the second negative voltage providing end through the second capacitor, so that the upper bridge arm IGBT is driven to be turned off.
Optionally, the method further comprises:
and the power supply circuit is used for converting the voltage output by the preset power supply into the voltage required to be output by the first positive voltage supply end and the voltage required to be output by the first negative voltage supply end.
Optionally, the method further comprises:
and the bus voltage conversion circuit is used for converting the voltage on the positive bus into the voltage required to be output by the second negative voltage supply end.
Optionally, the lower bridge driving circuit is further configured to receive a lower bridge driving signal output by the controller, and forward transmit a current output by the first positive voltage providing terminal to an output terminal of the lower bridge driving circuit in response to the lower bridge driving signal; or, reversely transmitting the current output by the output end of the lower bridge driving circuit to the first negative voltage providing end.
Optionally, the upper bridge driving circuit is further configured to receive an upper bridge driving signal output by the controller, charge the first capacitor in response to the upper bridge driving signal, and transmit a current in the fully charged first capacitor to an output end of the upper bridge driving circuit; or, the second capacitor is charged, and the current output by the output end of the upper bridge driving circuit is reversely transmitted to the second negative voltage providing end through the second capacitor.
Optionally, the lower bridge driving circuit includes a first resistor, a second resistor, a third capacitor, a first optocoupler, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a fourth capacitor, a fifth capacitor, a first diode, a second diode, a third diode, a fourth diode, and a fifth diode;
the 1 st pin of the first optical coupler is connected with a second positive voltage providing end, the 2 nd pin of the first optical coupler receives the lower bridge driving signal through a first resistor, a second resistor and a third capacitor are respectively connected in parallel at the two ends of the 1 st pin and the 2 nd pin of the first optical coupler, the 3 rd pin of the first optical coupler is connected with the first positive voltage providing end through a third resistor, the 4 th pin of the first optical coupler is connected with the output end of the lower bridge driving circuit through a fourth resistor, a fifth resistor is connected in parallel at the two ends of the fourth resistor, the output end of the lower bridge driving circuit is also connected with a third diode and the anode of the fourth diode, the cathode of the fourth diode and the cathode of the third diode are both connected with the cathode of the fifth diode, the anode of the fifth diode is connected with a negative bus, the fifth capacitor is connected between the negative bus and the output end of the lower bridge driving circuit, the anode of the third diode is connected with one end of the sixth resistor and one end of the seventh resistor, the other end of the seventh resistor is connected with the negative bus, the other end of the sixth resistor is connected with the anodes of the first diode and the second diode, the cathodes of the first diode and the second diode are connected with the 4 th pin of the first optical coupler, the fifth pin of the first optical coupler is connected with the first negative pressure providing end, and the fourth capacitor is connected with the 1 st pin of the first optical coupler and the two ends of the 5 th pin in parallel.
Optionally, the upper bridge driving circuit includes a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a sixth diode, a seventh diode, an eighth diode, a ninth diode, a twelfth diode, an eleventh diode, a twelfth diode, a thirteenth diode, a fourteenth diode, and a second optocoupler;
a pin 1 of the second optocoupler is connected with a second positive voltage supply end, a pin 2 of the second optocoupler receives an upper bridge driving signal through an eighth resistor, a sixth capacitor is connected between the second positive voltage supply end and the ground, a seventh capacitor is connected in parallel at two ends of the sixth capacitor, and a ninth resistor and an eighth capacitor are respectively connected in parallel between the pin 1 and the pin 2 of the second optocoupler; a pin 3 of the second optocoupler is connected with a cathode of a sixth diode, one end of a ninth capacitor and one end of a first capacitor, an anode of the sixth diode is connected with a first positive voltage providing end through a tenth resistor, the other end of the ninth capacitor is connected with a pin 5 of the second optocoupler, the other end of the first capacitor is connected with a U-phase line and one end of a second capacitor, the other end of the second capacitor is connected with a pin 5 of the second optocoupler, the U-phase line is connected with a cathode of the ninth diode and a cathode of a twelfth polar tube, an anode of the ninth diode and an anode of the twelfth polar tube are both connected with a pin 5 of the second optocoupler, a pin 4 of the second optocoupler is connected with one end of an eleventh resistor, a cathode of a seventh diode and a cathode of an eighth diode, the twelfth resistor is connected in parallel with two ends of the eleventh resistor, and the other end of the eleventh resistor is connected with an anode of the twelfth diode, The anode of a thirteenth diode is connected with the output end of the upper bridge driving circuit, the anode of a seventh diode and the anode of an eighth diode are connected with the output end of the upper bridge driving circuit through a thirteenth resistor, the cathode of the twelfth diode and the cathode of the thirteenth diode are respectively connected with the cathode of a fourteenth diode, the anode of the fourteenth diode is connected with a U-phase line, a tenth capacitor is connected between the output end of the upper bridge driving circuit and the U-phase line in parallel, a 5 th pin of a second optocoupler is connected with the anode of an eleventh diode, and the cathode of the eleventh diode is connected with a second negative voltage providing end.
Optionally, the bus voltage conversion circuit includes a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a fifteenth diode, and an eleventh capacitor;
the cathode of the fifteenth diode is connected with the positive bus, the anode of the fifteenth diode is connected with one end of the fifteenth resistor and one end of the twenty-fifth resistor, the other end of the twenty-fifth resistor is connected with the second negative voltage supply end, one end of the eleventh capacitor is connected with the cathode of the fifteenth diode, the other end of the eleventh capacitor is connected with the anode of the fifteenth diode, the other end of the fifteenth resistor is connected with the negative bus sequentially through the seventeenth resistor, the nineteenth resistor, the twenty-first resistor and the twenty-third resistor, the sixteenth resistor is connected in parallel with the two ends of the fifteenth resistor, the eighteenth resistor is connected in parallel with the two ends of the seventeenth resistor, the twentieth resistor is connected in parallel with the two ends of the nineteenth resistor, the twenty-second resistor is connected in parallel with the two ends of the twenty-first resistor, and the twenty-fourth resistor is connected in parallel with the two ends of the twenty-third resistor.
Optionally, the power supply circuit includes an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a twenty sixth resistor, a twenty seventh resistor, a twenty eighth resistor, a sixteenth diode, a seventeenth diode, and an eighteenth diode;
the positive electrode of the preset power supply is connected with one end of an eleventh capacitor, one end of a thirteenth capacitor, one end of a fifteenth capacitor, the cathode of a sixteenth diode and a first positive voltage providing end, the other end of the eleventh capacitor, the other end of the thirteenth capacitor, the other end of the fifteenth capacitor and the anode of the sixteenth diode are all connected with a negative bus, the negative electrode of the preset power supply is connected with one end of a twelfth capacitor, one end of a fourteenth capacitor, one end of a sixteenth capacitor, one end of a twenty-sixth resistor, one end of a twenty-seventh resistor, one end of a twenty-eighth resistor, the anode of a seventeenth diode, the anode of an eighteenth diode and a first negative voltage providing end, the other end of a twelfth capacitor, the other end of a fourteenth capacitor, the other end of a sixteenth capacitor, the other end of a twenty-sixth resistor, the other end of a twenty-seventh resistor and the other end of a twenty-eighth resistor, And the cathode of the seventeenth diode and the cathode of the eighteenth diode are both connected with the negative bus.
According to a second aspect, an embodiment provides an IGBT circuit including an upper arm IGBT circuit, a lower arm IGBT circuit, and an IGBT driving circuit as described in the above embodiments, the IGBT driving circuit configured to output a signal for driving the upper arm IGBT circuit to turn on/off and a signal for driving the lower arm IGBT circuit to turn on/off.
According to the IGBT driving circuit and the IGBT circuit of the embodiment, the lower bridge driving circuit provides positive pressure through the first positive pressure providing end to drive the lower bridge arm IGBT to be connected, negative pressure is provided through the first negative pressure providing end to drive the lower bridge arm IGBT to be quickly disconnected, in addition, the upper bridge driving circuit generates positive pressure through charging the first capacitor to drive the upper bridge arm IGBT to be connected, and generates negative pressure through charging the second capacitor to drive the upper bridge arm IGBT to be quickly disconnected, so that the situation that the upper bridge arm and the lower bridge arm of the IGBT circuit are directly connected is avoided, and the stability of the IGBT circuit is improved.
Drawings
FIG. 1 is a schematic structural diagram of an IGBT circuit according to an embodiment;
FIG. 2 is a circuit schematic of a full bridge IGBT circuit;
FIG. 3 is a schematic circuit diagram of an IGBT driving circuit according to an embodiment;
FIG. 4 is a schematic circuit diagram of a bus voltage converting circuit according to an embodiment;
FIG. 5 is a circuit diagram of a power circuit according to an embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
At present, a common IGBT driving circuit can drive an upper bridge arm IGBT or a lower bridge arm IGBT to be quickly turned off in a mode that an independent power supply provides negative pressure, and the problem of direct connection of the upper bridge arm and the lower bridge arm is avoided.
In the embodiment of the invention, the lower bridge driving circuit provides positive pressure through the first positive pressure providing end to drive the lower bridge arm IGBT to be conducted, and then provides negative pressure through the first negative pressure providing end to drive the lower bridge arm IGBT to be rapidly turned off; and, first positive pressure provides the end and first negative pressure provides the end and all obtains through predetermineeing the power all the way, has solved the problem that the multichannel independent power supply provides the negative pressure and leads to PCB to walk the line complicacy simultaneously.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an IGBT circuit according to an embodiment, where the IGBT circuit includes an upper arm IGBT circuit 20, a lower arm IGBT circuit 30, and an IGBT driving circuit 10, where the IGBT driving circuit 10 is configured to output a signal for driving the upper arm IGBT circuit 20 to turn on/off and a signal for driving the lower arm IGBT circuit 30 to turn on/off.
The upper arm IGBT circuit 20 and the lower arm IGBT circuit 30 constitute a full bridge IGBT circuit, please refer to fig. 2, fig. 2 is a schematic circuit diagram of the full bridge IGBT circuit, where GU + is a signal that the IGBT driving circuit 10 outputs to drive the upper arm IGBT circuit 20 to turn on/off, GU-is a signal that the IGBT driving circuit 10 outputs to drive the lower arm IGBT circuit 30 to turn on/off, P is a positive bus of the IGBT circuit, N is a negative bus of the IGBT circuit, and U is a U phase in the IGBT circuit.
Referring to fig. 3, fig. 3 is a circuit schematic diagram of an IGBT driving circuit according to an embodiment, where the IGBT driving circuit includes an upper bridge driving circuit and a lower bridge driving circuit.
The lower bridge driving circuit is used for transmitting the current output by the first positive voltage providing end to the output end of the lower bridge driving circuit in the forward direction so as to drive the lower bridge arm IGBT to be conducted; or reversely transmitting the current output by the output end of the lower bridge driving circuit to the first negative voltage providing end so as to drive the lower bridge arm IGBT to be switched off. The output end of the lower bridge driving circuit is used for outputting a GU-signal, which is used for driving the lower bridge arm IGBT circuit 30 to turn on/off.
In this embodiment, the lower bridge driving circuit is further configured to receive a lower bridge driving signal output by the controller, and forward transmit a current output by the first positive voltage providing terminal to an output terminal of the lower bridge driving circuit in response to the lower bridge driving signal PU —; or, in response to the lower bridge driving signal PU —, the current output from the output terminal of the lower bridge driving circuit is reversely transmitted to the first negative voltage supply terminal.
The upper bridge driving circuit comprises a first capacitor C1 and a second capacitor C2, and is used for charging the first capacitor C1 and transmitting the current in the fully charged first capacitor C1 to the output end of the upper bridge driving circuit so as to drive the upper bridge arm IGBT to be conducted, wherein the first capacitor C1 is charged through the first positive voltage supply end; or, the second capacitor C2 is charged, and the current output by the output end of the upper bridge driving circuit is reversely transmitted to the second negative voltage providing end through the second capacitor C2, so as to drive the upper bridge arm IGBT to be turned off. The output end of the upper bridge driving circuit is used for outputting a GU + signal, and the GU + signal is used for driving the upper bridge arm IGBT circuit 20 to be switched on/off.
In this embodiment, the upper bridge driving circuit is further configured to receive an upper bridge driving signal PU + output by the controller, charge the first capacitor C1 in response to the upper bridge driving signal PU +, and transmit a fully charged current in the first capacitor C1 to an output end of the upper bridge driving circuit; or, the second capacitor C2 is charged, and the current output by the output terminal of the upper bridge driving circuit is reversely transmitted to the second negative voltage providing terminal through the second capacitor C2.
In this embodiment, the IGBT driving circuit further includes a power supply circuit, which is configured to convert a voltage output by a preset power supply into a voltage required to be output by the first positive voltage providing terminal and a voltage required to be output by the first negative voltage providing terminal. In this embodiment, the predetermined power source is +24V, the voltage required to be output by the first positive voltage providing terminal is +16V, and the voltage required to be output by the first negative voltage providing terminal is-8V.
In this embodiment, the IGBT driving circuit further includes a bus voltage converting circuit for converting the voltage on the positive bus P into a voltage required to be output by the second negative voltage supply terminal. In this embodiment, the voltage P-7.5V required to be output by the second negative voltage supply terminal is 7.5V less than the voltage on the positive bus.
The lower bridge driving circuit comprises a first resistor R1, a second resistor R2, a third capacitor C3, a first optical coupler U1, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a fourth capacitor C4, a fifth capacitor C5, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4 and a fifth diode D5. Wherein, the 1 st pin of the first optical coupler U1 is connected with the second positive voltage providing terminal (+ 5V), the 2 nd pin of the first optical coupler U1 receives the lower bridge driving signal PU-through the first resistor R1, the second resistor R2 and the third capacitor C3 are respectively connected in parallel at the two ends of the 1 st pin and the 2 nd pin of the first optical coupler U1, the 3 rd pin of the first optical coupler U1 is connected with the first positive voltage providing terminal through the third resistor R3, the 4 th pin of the first optical coupler U1 is connected with the output terminal of the lower bridge driving circuit through the fourth resistor R4, the fifth resistor R5 is connected in parallel at the two ends of the fourth resistor R4, the output terminal of the lower bridge driving circuit is also connected with the third diode D3 and the anode of the fourth diode D4, the cathode of the fourth diode D4 and the cathode of the third diode D3 are both connected with the cathode of the fifth diode D5, the anode of the fifth diode D5 is connected with the negative bus bar N, the negative bus bar of the fifth diode D5 is connected with the negative bus bar N-bar C-N-bus bar driving circuit, the anode of the third diode D3 is connected with one end of a sixth resistor R6 and one end of a seventh resistor R7, the other end of the seventh resistor R7 is connected with a negative bus N, the other end of the sixth resistor R6 is connected with the anodes of the first diode D1 and the second diode D2, the cathodes of the first diode D1 and the second diode D2 are connected with the 4 th pin of the first optical coupler U1, the fifth pin of the first optical coupler U1 is connected with the first negative voltage providing end, and the fourth capacitor C4 is connected in parallel with the two ends of the 1 st pin and the 5 th pin of the first optical coupler U1.
When the lower bridge driving signal PU-is at a low level, the 3 rd pin and the 4 th pin of the first optocoupler U1 are turned on, the +16V voltage output by the first positive voltage providing terminal flows to the output terminal of the lower bridge driving circuit and outputs a GU signal after passing through the third resistor R3 for current limiting and the fourth resistor R4// the fifth resistor R5 for driving, and the output terminal of the lower bridge driving circuit in this embodiment is a lower bridge driving gate, so that the IGBT of the lower bridge arm is turned on. When the lower bridge driving signal PU-is at a high level, the 4 th pin and the 5 th pin of the first optocoupler U1 are conducted, and a GU-signal output by the output end (a lower bridge driving gate) of the lower bridge driving circuit flows to the first negative voltage providing end (-8V) through a driving resistor formed by the fourth resistor R4// the fifth resistor R5// the sixth resistor R6, so that the IGBT negative voltage of the lower bridge arm is quickly turned off.
The upper bridge driving circuit comprises a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a sixth diode D6, a seventh diode D7, an eighth diode D8, a ninth diode D9, a twelfth diode D10, an eleventh diode D11, a twelfth diode D12, a thirteenth diode D13, a fourteenth diode D14 and a second optical coupler U2. A 1 st pin of the second optical coupler U2 is connected with a second positive voltage providing end, a 2 nd pin of the second optical coupler U2 receives an upper bridge driving signal through an eighth resistor R8, a sixth capacitor C6 is connected between the second positive voltage providing end and the ground, a seventh capacitor C7 is connected in parallel with two ends of a sixth capacitor C6, and a ninth resistor R9 and an eighth capacitor C8 are respectively connected in parallel between the 1 st pin and the 2 nd pin of the second optical coupler U2; a 3 rd pin of the second optical coupler U2 is connected with a cathode of a sixth diode D6, one end of a ninth capacitor C9 and one end of a first capacitor C1, an anode of the sixth diode D6 is connected with a first positive voltage providing end through a tenth resistor R10, the other end of a ninth capacitor C9 is connected with a 5 th pin of the second optical coupler U2, the other end of the first capacitor C1 is connected with a U-phase line and one end of a second capacitor C2, the other end of the second capacitor C2 is connected with a 5 th pin of a second optical coupler U2, the U-phase line is connected with a cathode of the ninth diode D9 and a cathode of a twelfth diode D10, an anode of the ninth diode D9 and an anode of the twelfth diode D10 are both connected with a 5 th pin of the second optical coupler U2, a 4 th pin of the second optical coupler U2 is connected with one end of an eleventh resistor R11, a cathode of the seventh diode D7 and a cathode of the eighth diode D8, and a cathode of the eleventh resistor R12 is connected in parallel with both ends of the eleventh resistor R11, the other end of the eleventh resistor R11 is connected to an anode of the twelfth diode D12, an anode of the thirteenth diode D13 and the output end of the upper bridge driving circuit, an anode of the seventh diode D7 and an anode of the eighth diode D8 are connected to the output end of the upper bridge driving circuit through the thirteenth resistor R13, a cathode of the twelfth diode D12 and a cathode of the thirteenth diode D13 are connected to a cathode of the fourteenth diode D14, an anode of the fourteenth diode D14 is connected to the U-phase line, the tenth capacitor C10 is connected in parallel between the output end of the upper bridge driving circuit and the U-phase line, the 5 th pin of the second optocoupler U2 is connected to the anode of the eleventh diode D11, and the cathode of the eleventh diode D11 is connected to the second negative voltage providing end.
In this embodiment, before the IGBT of the upper arm is driven to be turned on, the IGBT of the lower arm needs to be driven to be turned on first, when the IGBT of the lower arm is turned on, the voltage output by the U-phase line is the same as the voltage output by the negative bus N, at this time, the +16V voltage output by the first positive voltage providing end is charged to the first capacitor C1 through the tenth resistor R10 and the sixth diode D6 for current limiting, after the first capacitor C1 is fully charged, a voltage difference of about 16V occurs at two ends of the first capacitor C1, if the upper bridge driving signal PU + is at a low level, the 3 rd pin and the 4 th pin of the second optocoupler U2 are turned on, and the first capacitor C1 is turned on through the 3 rd pin and the 4 th pin of the second optocoupler U2, and the eleventh resistor R11// the twelfth resistor R12 to be output to the output end of the upper bridge driving circuit, and output a GU + signal to drive the IGBT of the upper arm to be turned on. When the IGBT of the upper bridge arm is conducted, the output voltage of the U-phase line is the same as the voltage on the positive bus P, the positive bus P charges the second capacitor C2, after the second capacitor C2 is fully charged, a voltage difference of about 7.5V appears at two ends of the second capacitor C2, if an upper bridge driving signal PU + is at a high level, a pin 4 and a pin 5 of the second optocoupler U2 are conducted, a GU + signal at the output end of the upper bridge driving circuit flows to a second negative voltage providing end through a driving resistor formed by R11// R12// R13 and an eleventh diode D11, and the IGBT negative voltage of the upper bridge arm is driven to be rapidly turned off.
Referring to fig. 4, fig. 4 is a circuit diagram of a bus voltage converting circuit according to an embodiment, where the bus voltage converting circuit includes a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a fifteenth diode D15, and an eleventh capacitor C11. A cathode of the fifteenth diode D15 is connected to the positive bus P, an anode of the fifteenth diode D15 is connected to one end of a fifteenth resistor R15 and one end of a twenty-fifth resistor R25, the other end of the twenty-fifth resistor R25 is connected to the second negative voltage supply terminal, one end of an eleventh capacitor C11 is connected to a cathode of the fifteenth diode D15, the other end of the eleventh capacitor C11 is connected to an anode of the fifteenth diode D15, the other end of the fifteenth resistor R15 passes through a seventeenth resistor R17 and a nineteenth resistor R19 in sequence, the twenty-first resistor R21 and the twenty-third resistor R23 are connected with the negative bus N, the sixteenth resistor R16 is connected with two ends of the fifteenth resistor R15 in parallel, the eighteenth resistor R18 is connected with two ends of the seventeenth resistor R17 in parallel, the twentieth resistor R20 is connected with two ends of the nineteenth resistor R19 in parallel, the twenty-second resistor R22 is connected with two ends of the twenty-first resistor R21 in parallel, and the twenty-fourth resistor R24 is connected with two ends of the twenty-third resistor R23 in parallel.
The fifteenth diode D15 in this embodiment is a zener diode, and the voltage on the positive bus P generates a voltage 7.5V lower than the voltage on the positive bus P through the zener diode D15 and outputs the voltage to the second negative voltage providing terminal.
Referring to fig. 5, fig. 5 is a circuit diagram of a power circuit according to an embodiment, where the power circuit includes an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a sixteenth capacitor C16, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a sixteenth diode D16, a seventeenth diode D17, and an eighteenth diode D18. A positive electrode of a preset power supply is connected with one end of an eleventh capacitor C11, one end of a thirteenth capacitor C13, one end of a fifteenth capacitor C15, a cathode of a sixteenth diode D16 and a first positive voltage supply end, the other end of the eleventh capacitor C11, the other end of a thirteenth capacitor C13, the other end of a fifteenth capacitor C15 and an anode of a sixteenth diode D16 are all connected with the negative bus N, a negative electrode of the preset power supply is connected with one end of a twelfth capacitor C12, one end of a fourteenth capacitor C14, one end of a sixteenth capacitor C16, one end of a twenty-sixth resistor R26, one end of a twenty-seventh resistor R27, one end of a twenty-eighth resistor R28, an anode of a seventeenth diode D17, an anode of an eighteenth diode D18 and a first negative voltage supply end, the other end of a twelfth capacitor C12, the other end of a fourteenth capacitor C14, the other end of a sixteenth capacitor C16 and the other end of a twenty-sixth resistor R26 are connected with the negative voltage supply end of the twelfth capacitor C12, The other end of the twenty-seventh resistor R27, the other end of the twenty-eighth resistor R28, the cathode of the seventeenth diode D17 and the cathode of the eighteenth diode D18 are all connected with the negative bus N.
In this embodiment, the preset power source is a +24V voltage source, which can generate a +16V voltage and a-8V voltage through the power circuit, and respectively output the voltages to the first positive voltage supply terminal and the first negative voltage supply terminal. Therefore, the embodiment of the invention can realize the IGBT driving circuit of the negative voltage turn-off through one independent power supply (the preset power supply), thereby avoiding the problem of complicated PCB wiring.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (8)
1. An IGBT driving circuit characterized by comprising:
the lower bridge driving circuit is used for transmitting the current output by the first positive voltage providing end to the output end of the lower bridge driving circuit in the forward direction so as to drive the IGBT of the lower bridge arm to be conducted; or reversely transmitting the current output by the output end of the lower bridge driving circuit to a first negative voltage providing end so as to drive the IGBT of the lower bridge arm to be switched off;
the upper bridge driving circuit comprises a first capacitor (C1) and a second capacitor (C2), and is used for charging the first capacitor (C1) and transmitting the current in the fully charged first capacitor (C1) to the output end of the upper bridge driving circuit so as to drive an upper bridge arm IGBT to be conducted, wherein the first capacitor (C1) is charged through the first positive voltage supply end; or the second capacitor (C2) is charged, and the current output by the output end of the upper bridge driving circuit is reversely transmitted to the second negative voltage providing end through the second capacitor (C2) so as to drive the upper bridge arm IGBT to be turned off;
the lower bridge driving circuit is also used for receiving a lower bridge driving signal output by the controller and responding to the lower bridge driving signal to forward transmit the current output by the first positive voltage providing end to the output end of the lower bridge driving circuit; or, reversely transmitting the current output by the output end of the lower bridge driving circuit to a first negative voltage providing end;
the lower bridge driving circuit comprises a first resistor (R1), a second resistor (R2), a third capacitor (C3), a first optical coupler (U1), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a sixth resistor (R6), a seventh resistor (R7), a fourth capacitor (C4), a fifth capacitor (C5), a first diode (D1), a second diode (D2), a third diode (D3), a fourth diode (D4) and a fifth diode (D5);
a 1 st pin of the first optical coupler (U1) is connected with a second positive voltage providing end, a 2 nd pin of the first optical coupler (U1) receives the lower bridge driving signal through a first resistor (R1), a second resistor (R2) and a third capacitor (C3) are respectively connected with two ends of a 1 st pin and a 2 nd pin of the first optical coupler (U1) in parallel, a 3 rd pin of the first optical coupler (U1) is connected with the first positive voltage providing end through a third resistor (R3), a 4 th pin of the first optical coupler (U1) is connected with an output end of the lower bridge driving circuit through a fourth resistor (R4), a fifth resistor (R5) is connected with two ends of a fourth resistor (R4) in parallel, an output end of the lower bridge driving circuit is also connected with anodes of a third diode (D3) and a fourth diode (D4), cathodes of the fourth diode (D4) and a cathode of the third diode (D3) are connected with a cathode of the fifth diode (D5), an anode of a fifth diode (D5) is connected with a negative bus (N), a fifth capacitor (C5) is connected between the negative bus (N) and the output end of the lower bridge driving circuit, an anode of the third diode (D3) is connected with one ends of a sixth resistor (R6) and a seventh resistor (R7), the other end of the seventh resistor (R7) is connected with the negative bus (N), the other end of the sixth resistor (R6) is connected with anodes of a first diode (D1) and a second diode (D2), cathodes of a first diode (D1) and a second diode (D2) are connected with a 4 th pin of a first optical coupler (U1), a 5 th pin of the first optical coupler (U1) is connected with a first negative voltage supply end, and a fourth capacitor (C4) is connected in parallel with two ends of a 1 st pin and a 5 th pin of the first optical coupler (U1);
the first optocoupler (U1) comprises an input end first light emitting diode, an output end first triode and an output end second triode, wherein the anode of the input end first light emitting diode is connected with the 1 st pin of the first optocoupler (U1), and the cathode of the input end first light emitting diode is connected with the 2 nd pin of the first optocoupler (U1); the collector of the first triode of output end is connected with the 3 rd pin of the first optocoupler (U1), the emitter of the first triode of output end, the collector of the second triode of output end are connected with the 4 th pin of the first optocoupler (U1), and the emitter of the second triode of output end is connected with the 5 th pin of the first optocoupler (U1).
2. The IGBT drive circuit according to claim 1, further comprising:
and the power supply circuit is used for converting the voltage output by the preset power supply into the voltage required to be output by the first positive voltage supply end and the voltage required to be output by the first negative voltage supply end.
3. The IGBT drive circuit according to claim 1, further comprising:
and the bus voltage conversion circuit is used for converting the voltage on the positive bus (P) into the voltage required to be output by the second negative voltage supply end.
4. The IGBT driver circuit of claim 1, wherein the upper bridge driver circuit is further configured to receive an upper bridge driving signal output by the controller, and in response to the upper bridge driving signal, charge the first capacitor (C1), and transfer the current in the fully charged first capacitor (C1) to the output of the upper bridge driver circuit; or, the second capacitor (C2) is charged, and the current output by the output end of the upper bridge driving circuit is reversely transmitted to the second negative voltage supply end through the second capacitor (C2).
5. The IGBT drive circuit according to claim 4, wherein the upper bridge drive circuit comprises a sixth capacitor (C6), a seventh capacitor (C7), an eighth capacitor (C8), a ninth capacitor (C9), a tenth capacitor (C10), an eighth resistor (R8), a ninth resistor (R9), a tenth resistor (R10), an eleventh resistor (R11), a twelfth resistor (R12), a thirteenth resistor (R13), a fourteenth resistor (R14), a sixth diode (D6), a seventh diode (D7), an eighth diode (D8), a ninth diode (D9), a twelfth diode (D10), an eleventh diode (D11), a twelfth diode (D12), a thirteenth diode (D13), a fourteenth diode (D14) and a second optocoupler (U2);
a 1 st pin of the second optical coupler (U2) is connected with a second positive voltage providing end, a 2 nd pin of the second optical coupler (U2) receives an upper bridge driving signal through an eighth resistor (R8), a sixth capacitor (C6) is connected between the second positive voltage providing end and the ground, a seventh capacitor (C7) is connected in parallel at two ends of the sixth capacitor (C6), and a ninth resistor (R9) and an eighth capacitor (C8) are respectively connected in parallel between the 1 st pin and the 2 nd pin of the second optical coupler (U2); a 3 rd pin of the second optocoupler (U2) is connected with a cathode of a sixth diode (D6), one end of a ninth capacitor (C9) is connected with one end of a first capacitor (C1), an anode of the sixth diode (D6) is connected with a first positive voltage providing end through a tenth resistor (R10), the other end of a ninth capacitor (C9) is connected with a 5 th pin of the second optocoupler (U2), the other end of the first capacitor (C1) is connected with a U-phase wire and one end of a second capacitor (C2), the other end of the second capacitor (C2) is connected with a 5 th pin of the second optocoupler (U2), the U-phase wire is connected with a cathode of the ninth diode (D9) and a cathode of a twelfth diode (D10), an anode of the ninth diode (D9) and an anode of the twelfth diode (D10) are both connected with a 5 th pin of the second optocoupler (U2), and an eleventh resistor (R364) pin of the second optocoupler (U2) is connected with an eleventh pin of the eleventh optocoupler (R11), A cathode of a seventh diode (D7) is connected with a cathode of an eighth diode (D8), a twelfth resistor (R12) is connected in parallel with two ends of the eleventh resistor (R11), the other end of the eleventh resistor (R11) is connected with an anode of a twelfth diode (D12), an anode of a thirteenth diode (D13) and an output end of the upper bridge driving circuit, an anode of the seventh diode (D7) and an anode of the eighth diode (D8) are connected with an output end of the upper bridge driving circuit through a thirteenth resistor (R13), a cathode of the twelfth diode (D12) and a cathode of the thirteenth diode (D13) are respectively connected with a cathode of a fourteenth diode (D14), an anode of a fourteenth diode (D14) is connected with a U-phase line, a tenth capacitor (C10) is connected in parallel between the output end of the upper bridge driving circuit and the U-phase line, a pin 5 of a second optocoupler diode (U2) is connected with an anode of the eleventh diode (D11), a cathode of the eleventh diode (D11) is connected to the second negative voltage supply terminal;
the second optocoupler (U2) comprises an input end second light emitting diode, an output end third triode and an output end fourth triode, wherein the anode of the input end second light emitting diode is connected with the 1 st pin of the second optocoupler (U2), and the cathode of the input end second light emitting diode is connected with the 2 nd pin of the second optocoupler (U2); the collector of the output end third triode is connected with the 3 rd pin of the second optocoupler (U2), the emitter of the output end third triode and the collector of the output end fourth triode are connected with the 4 th pin of the second optocoupler (U2), and the emitter of the output end fourth triode is connected with the 5 th pin of the second optocoupler (U2).
6. The IGBT driving circuit according to claim 3, wherein the bus voltage conversion circuit comprises a fifteenth resistor (R15), a sixteenth resistor (R16), a seventeenth resistor (R17), an eighteenth resistor (R18), a nineteenth resistor (R19), a twentieth resistor (R20), a twenty-first resistor (R21), a twenty-second resistor (R22), a twenty-third resistor (R23), a twenty-fourth resistor (R24), a twenty-fifth resistor (R25), a fifteenth diode (D15) and an eleventh capacitor (C11);
the cathode of the fifteenth diode (D15) is connected with the positive bus (P), the anode of the fifteenth diode (D15) is connected with one end of the fifteenth resistor (R15) and one end of the twenty-fifth resistor (R25), the other end of the twenty-fifth resistor (R25) is connected with the second negative voltage providing end, one end of the eleventh capacitor (C11) is connected with the cathode of the fifteenth diode (D15), the other end of the eleventh capacitor (C11) is connected with the anode of the fifteenth diode (D15), the other end of the fifteenth resistor (R15) is connected with the two ends of the fifteenth resistor (R15) in parallel through the seventeenth resistor (R17), the nineteenth resistor (R19), the twenty-first resistor (R21) and the twenty-third resistor (R23) in sequence, the sixteenth resistor (R16) is connected with the two ends of the fifteenth resistor (R15) in parallel, the eighteenth resistor (R356) is connected with the seventeenth resistor (R17) in parallel, the two ends of the twenty-fifth resistor (R20) is connected with the nineteenth resistor (R19) in parallel, the twenty-second resistor (R22) is connected in parallel across the twenty-first resistor (R21), and the twenty-fourth resistor (R24) is connected in parallel across the twenty-third resistor (R23).
7. The IGBT driving circuit according to claim 2, wherein the power supply circuit includes an eleventh capacitor (C11), a twelfth capacitor (C12), a thirteenth capacitor (C13), a fourteenth capacitor (C14), a fifteenth capacitor (C15), a sixteenth capacitor (C16), a twenty-sixth resistor (R26), a twenty-seventh resistor (R27), a twenty-eighth resistor (R28), a sixteenth diode (D16), a seventeenth diode (D17), and an eighteenth diode (D18);
the positive electrode of the preset power supply is connected with one end of an eleventh capacitor (C11), one end of a thirteenth capacitor (C13), one end of a fifteenth capacitor (C15), the cathode of a sixteenth diode (D16) and a first positive voltage providing end, the other end of the eleventh capacitor (C11), the other end of a thirteenth capacitor (C13), the other end of a fifteenth capacitor (C15) and the anode of a sixteenth diode (D16) are all connected with a negative bus (N), the negative electrode of the preset power supply is connected with one end of a twelfth capacitor (C12), one end of a fourteenth capacitor (C14), one end of a sixteenth capacitor (C16), one end of a twenty-sixth resistor (R26), one end of a twenty-seventh resistor (R27), one end of a twenty-eighth resistor (R28), the anode of a seventeenth diode (D17), the anode of an eighteenth diode (D18) and a first negative voltage providing end, and the other end of a twelfth capacitor (C12) is connected with a first negative voltage providing end, and the negative voltage providing end of the twelfth capacitor (C12), The other end of the fourteenth capacitor (C14), the other end of the sixteenth capacitor (C16), the other end of the twenty-sixth resistor (R26), the other end of the twenty-seventh resistor (R27), the other end of the twenty-eighth resistor (R28), the cathode of the seventeenth diode (D17) and the cathode of the eighteenth diode (D18) are all connected with the negative bus (N).
8. An IGBT circuit, characterized by comprising an upper bridge arm IGBT circuit, a lower bridge arm IGBT circuit and the IGBT drive circuit according to any one of claims 1 to 7, wherein the IGBT drive circuit is used for outputting a signal for driving the upper bridge arm IGBT circuit to be turned on/off and a signal for driving the lower bridge arm IGBT circuit to be turned on/off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011163896.7A CN112332640B (en) | 2020-10-27 | 2020-10-27 | IGBT drive circuit and IGBT circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011163896.7A CN112332640B (en) | 2020-10-27 | 2020-10-27 | IGBT drive circuit and IGBT circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112332640A CN112332640A (en) | 2021-02-05 |
| CN112332640B true CN112332640B (en) | 2022-04-19 |
Family
ID=74296807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011163896.7A Active CN112332640B (en) | 2020-10-27 | 2020-10-27 | IGBT drive circuit and IGBT circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112332640B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471234A (en) * | 2015-12-16 | 2016-04-06 | 山西惠特科技有限公司 | Optical fiber signal conversion circuit for 3,300V high-power IGBT driver |
| CN107547031A (en) * | 2017-10-11 | 2018-01-05 | 珠海英搏尔电气股份有限公司 | H-bridge drive circuit, controller and the electric car of controller for electric vehicle |
| CN208094432U (en) * | 2018-04-23 | 2018-11-13 | 广东希塔变频技术有限公司 | Power inverter protects circuit |
| CN108900076A (en) * | 2018-09-28 | 2018-11-27 | 广东百事泰电子商务股份有限公司 | Bridge driving circuit on inverter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10666147B1 (en) * | 2018-11-14 | 2020-05-26 | Navitas Semiconductor, Inc. | Resonant converter control based on zero current detection |
-
2020
- 2020-10-27 CN CN202011163896.7A patent/CN112332640B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471234A (en) * | 2015-12-16 | 2016-04-06 | 山西惠特科技有限公司 | Optical fiber signal conversion circuit for 3,300V high-power IGBT driver |
| CN107547031A (en) * | 2017-10-11 | 2018-01-05 | 珠海英搏尔电气股份有限公司 | H-bridge drive circuit, controller and the electric car of controller for electric vehicle |
| CN208094432U (en) * | 2018-04-23 | 2018-11-13 | 广东希塔变频技术有限公司 | Power inverter protects circuit |
| CN108900076A (en) * | 2018-09-28 | 2018-11-27 | 广东百事泰电子商务股份有限公司 | Bridge driving circuit on inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112332640A (en) | 2021-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101916548B (en) | Control circuit of light-emitting diode (LED) lamp tube of liquid crystal display | |
| CN102246406B (en) | Current source power conversion circuit | |
| CN112332640B (en) | IGBT drive circuit and IGBT circuit | |
| CN102751854B (en) | Circuit of switching elements | |
| CN205212745U (en) | Electric vehicle motor drive circuit | |
| CN108923388A (en) | A kind of fault detection circuit powering on buffer cell and method | |
| CN211579865U (en) | Single-power-supply bootstrapped IGBT (insulated Gate Bipolar transistor) driving circuit | |
| CN102651926B (en) | Auxiliary source circuit | |
| CN208015701U (en) | A kind of IGBT isolation control driving circuit | |
| CN103595252B (en) | A kind of power supply feedback device | |
| CN112803724A (en) | Positive-pressure turn-on and negative-pressure turn-off IGBT (insulated Gate Bipolar transistor) driving circuit | |
| CN111900967A (en) | IGBT drive interlocking circuit and IGBT circuit | |
| CN116827209B (en) | Enhanced driving circuit and servo driver applied by same | |
| CN218771757U (en) | Three-phase full-bridge power module for large-current driving and power supply driving circuit thereof | |
| CN214707518U (en) | IGBT drive circuit, IGBT system and electronic equipment | |
| CN215871200U (en) | Double-tube series flyback switching power supply driving circuit and switching power supply | |
| CN205566109U (en) | IGBT power supply circuit of converter | |
| CN217508339U (en) | Three-phase line battery charger and charging system thereof | |
| CN220528018U (en) | IGBT drive detection protection circuit and IGBT drive device | |
| CN201167282Y (en) | Power converter for reluctance motor of single terminal drive switch | |
| CN210007637U (en) | driving circuit of DC electric equipment | |
| CN114268216B (en) | Starting control system and method for auxiliary power supply of ultrahigh-voltage input type switching power supply | |
| CN219068091U (en) | Main circuit of servo driver, servo driver and servo system | |
| CN219611613U (en) | Switching tube rectifying circuit | |
| CN105958801B (en) | Electric automobile motor driver utilizing IPM front-end driving circuit |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |