CN111063566A - IGBT-based quick switching-off circuit - Google Patents
IGBT-based quick switching-off circuit Download PDFInfo
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- CN111063566A CN111063566A CN201911188274.7A CN201911188274A CN111063566A CN 111063566 A CN111063566 A CN 111063566A CN 201911188274 A CN201911188274 A CN 201911188274A CN 111063566 A CN111063566 A CN 111063566A
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- igbt
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- power supply
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/08116—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit in composite switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
- H01H2009/544—Contacts shunted by static switch means the static switching means being an insulated gate bipolar transistor, e.g. IGBT, Darlington configuration of FET and bipolar transistor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
- H01H2009/545—Contacts shunted by static switch means comprising a parallel semiconductor switch being fired optically, e.g. using a photocoupler
Abstract
The invention discloses a fast switching-off circuit based on an IGBT, which comprises: the system comprises a microprocessor MCU, an output starting circuit, an IGBT driving and output circuit and a relay driving and output circuit; the output of the microprocessor MCU is connected with an output starting circuit; the output of the open starting circuit is respectively connected with the IGBT driving and open circuit and the relay driving and open circuit; the outputs of the IGBT driving and switching-out circuit and the relay driving and switching-out circuit are connected in parallel and are connected to a tripping outlet node. According to the invention, the IGBT is driven by adopting the passive isolation transformer, and meanwhile, the IGBT and the relay switch-out node are connected in parallel, so that the isolation-free power supply, the loop structure, the action time and the action time discreteness are reliable, and the requirements of short action time (within 1 ms) and low action time discreteness (within 1 ms) for tripping switch-out on some sites can be met.
Description
Technical Field
The invention relates to the technical field of tripping open-out circuits, in particular to a rapid open-out circuit based on an IGBT.
Background
There are two main categories of existing open circuit for fast tripping: the first type is realized by using an RC passive device to be matched with a relay (as in patent CN 201811383906.0); the second type is realized by using IGBT and isolation power supply (for example, patent CN 201220722458.4).
These two types of approaches each have advantages and disadvantages:
the first kind of devices are few, the cost of a single loop is low, the loop structure is simple and reliable, but the practical principle is that the rapid action is realized by applying short-time overvoltage to the action coil of the relay, the action is still realized by depending on an electromagnetic adsorption contact, the action time is generally more than 2ms, the action within 1ms is difficult to realize, and the action time of the contact is unstable and the discreteness is larger (ms level) because the relay is a mechanical contact.
The second type of devices are multiple, the actual principle is that the on-off is realized through a semiconductor device IGBT (insulated gate bipolar transistor), the action time is fast (us level), and the action principle is based on the semiconductor device, the circuit action time discreteness is good (us level), but the IGBT driving circuit structure is complex, peripheral devices are multiple, the reliability is relatively low, the circuit needs an isolation power supply, an isolation power supply monitoring circuit needs to be additionally added, the circuit occupation area is large, and the additional cost is high.
With the development of smart power grids, in some occasions, in order to realize accurate control of mechanisms, requirements of short action time (within 1 ms) and low action time discreteness (within 1 ms) are provided for tripping action time on site.
There is a need for a fast output circuit with short operation time, low dispersion of operation time, and simple and reliable circuit structure.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the rapid switching-on circuit based on the IGBT, which has the advantages of simple and reliable circuit structure, short action time and low action time discreteness.
In order to achieve the above purpose, the invention adopts the following technical scheme: an IGBT-based fast open circuit comprising: the system comprises a microprocessor MCU, an output starting circuit, an IGBT driving and output circuit and a relay driving and output circuit; the output of the microprocessor MCU is connected with an output starting circuit; the output of the open starting circuit is respectively connected with the IGBT driving and open circuit and the relay driving and open circuit; the outputs of the IGBT driving and switching-out circuit and the relay driving and switching-out circuit are connected in parallel and are connected to a tripping outlet node.
Further, the microprocessor sends a starting signal to the starting circuit, and the starting circuit sends a starting signal to the IGBT driving and starting circuit and the relay driving and starting circuit respectively, so that the IGBT and the relay normally act; and after receiving the action signal, the MCU outputs an opening action signal to the IGBT driving and opening circuit and the relay driving and opening circuit respectively, wherein the IGBT acts firstly, the relay acts secondly, the IGBT acts firstly and is disconnected, and the relay acts secondly and is disconnected.
Further, the open start circuit includes: the power supply comprises an opening power supply PWR _ DO, an opening action power supply PWR _ DO _ QD, a first current limiting resistor and an optocoupler relay; one end of the first current-limiting resistor is connected with the anode of a light-emitting diode of the optocoupler relay, the other end of the first current-limiting resistor is connected with a power supply PWR of the MCU, the cathode of the light-emitting diode of the optocoupler relay is connected with a starting signal output end of the MCU, and the output of the optocoupler relay is connected with a power supply PWR _ DO and a power supply PWR _ DO _ QD of a switch-on action.
Further, the IGBT driving and switching circuit includes: the circuit comprises a second current limiting resistor, a first optocoupler, a coupling capacitor, an isolation transformer, an RC network, an IGBT and an open node protection device;
one end of the second current limiting resistor is connected with the anode of the light emitting diode of the first optocoupler, and the other end of the second current limiting resistor is connected with the MCU power supply PWR; the negative electrode of a light emitting diode of the first optical coupler is connected with an action signal output end of the MCU, a collector end of the first optical coupler is connected with an outgoing action power supply PWR _ DO _ QD, an emitter end of the first optical coupler is connected with the coupling capacitor and then connected with the isolation transformer, the isolation transformer is connected with the input end of the IGBT after passing through the RC network, the output end of the IGBT is connected with an outgoing node protection device, and the outgoing node protection device is connected with an external tripping outlet node.
Further, the RC network includes a first resistor, a second resistor, and a first capacitor, and the first resistor is connected in series with the second resistor and the first capacitor connected in parallel and then connected to the secondary side of the isolation transformer.
Further, the relay driving and switching circuit includes: the device comprises a third current limiting resistor, a second optocoupler, a freewheeling diode and a second relay, wherein one end of the third current limiting resistor is connected with the anode of a light emitting diode of the second optocoupler, and the other end of the third current limiting resistor is connected with an MCU power supply PWR; the negative pole of the light emitting diode of the second optical coupler is connected with the action signal output end of the MCU, the collector end of the second optical coupler is connected with the outgoing action power supply PWR _ DO _ QD, the emitter end of the second optical coupler is respectively connected with the negative pole of the fly-wheel diode and the positive pole end of the second relay action coil, the positive pole of the fly-wheel diode is connected with the negative pole end of the second relay action coil, the positive pole of the fly-wheel diode is grounded, and the output end of the second relay is connected with an external tripping outlet node.
The invention achieves the following beneficial effects: according to the invention, the IGBT is driven by adopting the passive isolation transformer, and meanwhile, the IGBT and the relay switch-out node are connected in parallel, so that the isolation-free power supply, the loop structure, the action time and the action time discreteness are reliable, and the requirements of short action time (within 1 ms) and low action time discreteness (within 1 ms) for tripping switch-out on some sites can be met.
Drawings
FIG. 1 is a schematic diagram of a fast-open circuit in an embodiment of the present invention;
FIG. 2 is a schematic diagram of an open start circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an IGBT driving and switching circuit structure according to an embodiment of the invention;
fig. 4 is a schematic diagram of a relay driving and outputting circuit structure according to an embodiment of the invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, an IGBT-based fast open circuit includes: the system comprises a microprocessor MCU, an output starting circuit, an IGBT driving and output circuit and a relay driving and output circuit; the output of the microprocessor MCU is connected with an output starting circuit; the output of the open starting circuit is respectively connected with the IGBT driving and open circuit and the relay driving and open circuit; the outputs of the IGBT driving and switching-out circuit and the relay driving and switching-out circuit are connected in parallel and are connected to a tripping outlet node.
The microprocessor sends a starting signal to the starting circuit, and the starting circuit sends a starting signal to the IGBT driving and starting circuit and the relay driving and starting circuit respectively, so that the IGBT and the relay can normally act; after the MCU receives the action signal, the output action signal is respectively sent to the IGBT drive and switch-out circuit and the relay drive and switch-out circuit, because the IGBT action time is fast, the IGBT can act firstly, the relay can act later, the IGBT action holding time is prolonged through setting RC network parameters in the IGBT drive and switch-out circuit, and when the IGBT action is disconnected, the relay switch-out node can act and is closed. By the mode that the IGBT and the relay opening node are connected in parallel, the IGBT acts first and then is closed, so that the opening and closing time depends on the IGBT, and the opening and closing time is short (within 1 ms) and the action time discreteness is low (within 1 ms); meanwhile, the IGBT acts and is disconnected firstly, and the relay acts and is disconnected secondly, so that the situation that the IGBT is damaged by high voltage induced by the outlet node when the IGBT is disconnected (at the moment, the outlet node is still closed due to the fact that the relay acts and is disconnected secondly) can be avoided. Finally, a common relay contact is responsible for node maintenance, so that after the rapid opening action, the performance of the opening node is the same as that of a common opening node.
As shown in fig. 2, the start-up circuit includes: the power supply device comprises a switching-on power supply PWR _ DO, a switching-off action power supply PWR _ DO _ QD, a first current-limiting resistor and an optical coupling relay. One end of the first current-limiting resistor is connected with the anode of a light-emitting diode of the optocoupler relay, the other end of the first current-limiting resistor is connected with a power supply PWR of the MCU, the cathode of the light-emitting diode of the optocoupler relay is connected with a starting signal output end of the MCU, and the output of the optocoupler relay is connected with a power supply PWR _ DO and a power supply PWR _ DO _ QD of a switch-on action.
And a starting signal sent by a starting signal output end of the MCU controls the on-off between the switching-on action power supply PWR _ DO _ QD and the switching-on power supply PWR _ DO through an optical coupling relay. When the start signal output end of the MCU is enabled, the opening action power supply PWR _ DO _ QD and the opening power supply PWR _ DO are conducted, the opening action power supply PWR _ DO _ QD can get electricity from the opening power supply PWR _ DO, and the IGBT and the relay can be normally opened to act; when the output of the starting signal output end of the MCU is not enabled, the opening action power supply PWR _ DO _ QD and the opening power supply PWR _ DO are disconnected, the opening action power supply PWR _ DO _ QD cannot get power from the opening power supply PWR _ DO, the IGBT and the relay are opened and locked, and the normal opening action cannot be carried out. The current limiting resistor is used for protecting the primary side light emitting diode of the optocoupler and preventing the light emitting diode from being burnt down due to overcurrent.
As shown in fig. 3, the IGBT driving and switching circuit includes: the circuit comprises a second current limiting resistor, a first optocoupler, a coupling capacitor, an isolation transformer, an RC network, an IGBT and an open node protection device;
one end of the second current limiting resistor is connected with the anode of the light emitting diode of the first optocoupler, and the other end of the second current limiting resistor is connected with the MCU power supply PWR; the negative electrode of a light emitting diode of the first optical coupler is connected with an action signal output end of the MCU, a collector end of the first optical coupler is connected with a switching-out action power supply PWR _ DO _ QD of the switching-out starting circuit, an emitter end of the first optical coupler is connected with the coupling capacitor and then connected with the isolation transformer, the isolation transformer is connected with an input end of the IGBT after passing through the RC network, an output end of the IGBT is connected with a switching-out node protection device, and the switching-out node protection device is connected with an external tripping outlet node.
The RC network comprises a first resistor, a second resistor and a first capacitor, wherein the first resistor is connected with the second resistor and the first capacitor which are connected in parallel in series and then connected to the secondary side of the isolation transformer;
the working principle is as follows: when the switch-on action power supply PWR _ DO _ QD and the switch-on action power supply PWR _ DO are conducted, the switch-on action signal sent by the MCU enables the secondary side of the optical coupler to be conducted, the voltage pulse of the secondary side is transmitted to the primary side of the isolation transformer through the coupling capacitor, and the secondary side of the transformer induces the power pulse to drive the IGBT to be conducted. The current limiting resistor is used for protecting the primary side light emitting diode of the optocoupler and preventing the light emitting diode from being burnt down due to overcurrent. The coupling capacitor is used for transmitting the power supply pulse signal to the isolation transformer. The isolation transformer is used for transmitting power supply pulse signals to drive the IGBT and can play a role in protecting primary side devices of the transformer. The RC network can extend the power supply pulse time and thus the IGBT action hold time so that when the IGBT is open, the relay node has acted to close. Therefore, the IGBT can be protected, and the damage to the IGBT caused by the high pulse voltage induced by the node when the IGBT is disconnected is avoided. And the output node protection device is used for protecting the differential mode interference between the IGBT nodes.
As shown in fig. 4, the relay driving and opening circuit includes: the device comprises a third current limiting resistor, a second optocoupler, a freewheeling diode and a second relay, wherein one end of the third current limiting resistor is connected with the anode of a light emitting diode of the second optocoupler, and the other end of the third current limiting resistor is connected with an MCU power supply PWR; the negative pole of the light emitting diode of the second optical coupler is connected with the action signal output end of the MCU, the collector end of the second optical coupler is connected with the opening action power supply PWR _ DO _ QD of the opening starting circuit, the emitter end of the second optical coupler is respectively connected with the negative pole of the fly-wheel diode and the positive pole end of the second relay action coil, the positive pole of the fly-wheel diode is connected with the negative pole end of the second relay action coil, the positive pole of the fly-wheel diode is grounded, and the output end of the second relay is connected with an external tripping outlet node.
The working principle is as follows: when the switch-on action power supply PWR _ DO _ QD and the switch-on power supply PWR _ DO are conducted, a switch-on action signal sent by the MCU is transmitted through the optical coupler to drive the second relay coil, and the relay normally switches on action. The current limiting resistor is used for protecting the primary side light emitting diode of the optocoupler and preventing the light emitting diode from being burnt down due to overcurrent. The freewheeling diode is used for protecting the second relay coil and preventing the relay coil from being damaged by high induction voltage after the coil is powered off.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The utility model provides a circuit is opened out fast based on IGBT which characterized in that: the method comprises the following steps: the system comprises a microprocessor MCU, an output starting circuit, an IGBT driving and output circuit and a relay driving and output circuit; the output of the microprocessor MCU is connected with an output starting circuit; the output of the open starting circuit is respectively connected with the IGBT driving and open circuit and the relay driving and open circuit; the outputs of the IGBT driving and switching-out circuit and the relay driving and switching-out circuit are connected in parallel and are connected to a tripping outlet node.
2. The IGBT-based fast open circuit of claim 1, wherein: the microprocessor sends a starting signal to the starting circuit, and the starting circuit sends a starting signal to the IGBT driving and starting circuit and the relay driving and starting circuit respectively, so that the IGBT and the relay can normally act; and after receiving the action signal, the MCU outputs an opening action signal to the IGBT driving and opening circuit and the relay driving and opening circuit respectively, wherein the IGBT acts firstly, the relay acts secondly, the IGBT acts firstly and is disconnected, and the relay acts secondly and is disconnected.
3. The IGBT-based fast open circuit of claim 1, wherein: the open start circuit includes: the power supply comprises an output power supply, an output action power supply, a first current limiting resistor and an optocoupler relay; one end of the first current-limiting resistor is connected with the anode of a light-emitting diode of the optocoupler relay, the other end of the first current-limiting resistor is connected with a power supply of the MCU, the cathode of the light-emitting diode of the optocoupler relay is connected with the output end of a starting signal of the MCU, and the output of the optocoupler relay is connected with the power supply and the action power supply.
4. The IGBT-based fast open circuit of claim 3, wherein: the IGBT driving and switching-off circuit comprises: the circuit comprises a second current limiting resistor, a first optocoupler, a coupling capacitor, an isolation transformer, an RC network, an IGBT and an open node protection device;
one end of the second current limiting resistor is connected with the anode of the light emitting diode of the first optocoupler, and the other end of the second current limiting resistor is connected with the MCU power supply; the negative electrode of a light emitting diode of the first optical coupler is connected with the output end of a tripping-out action signal of the MCU, the collector end of the first optical coupler is connected with a tripping-out action power supply, the emitter end of the first optical coupler is connected with the coupling capacitor and then connected with the isolation transformer, the isolation transformer is connected with the input end of the IGBT after passing through the RC network, the output end of the IGBT is connected with a tripping-out node protection device, and the tripping-out node protection device is connected with an external tripping-out outlet node.
5. The IGBT-based fast open circuit of claim 4, characterized in that: the RC network comprises a first resistor, a second resistor and a first capacitor, wherein the first resistor, the second resistor and the first capacitor which are connected in parallel are connected in series and then connected to the secondary side of the isolation transformer.
6. The IGBT-based fast open circuit of claim 3, wherein: the relay driving and switching circuit includes: the first current limiting resistor is connected with the anode of a light emitting diode of the first optical coupler, and the other end of the first current limiting resistor is connected with the MCU power supply; the negative pole of the light emitting diode of the second optical coupler is connected with the output end of the opening action signal of the MCU, the collector end of the second optical coupler is connected with the opening action power supply, the emitter end of the second optical coupler is respectively connected with the negative pole of the fly-wheel diode and the positive pole end of the second relay action coil, the positive pole of the fly-wheel diode is connected with the negative pole end of the second relay action coil, the positive pole of the fly-wheel diode is grounded, and the output end of the second relay is connected with an external tripping outlet node.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911188274.7A CN111063566A (en) | 2019-11-28 | 2019-11-28 | IGBT-based quick switching-off circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911188274.7A CN111063566A (en) | 2019-11-28 | 2019-11-28 | IGBT-based quick switching-off circuit |
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| CN111063566A true CN111063566A (en) | 2020-04-24 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201270500Y (en) * | 2008-07-29 | 2009-07-08 | 南京华士电子科技有限公司 | Novel IGBT driver |
| CN202978891U (en) * | 2012-12-25 | 2013-06-05 | 南京因泰莱电器股份有限公司 | Circuit realizing device used for fast starting out |
| CN205430039U (en) * | 2015-11-03 | 2016-08-03 | 乌鲁木齐化开紫光自动化系统有限公司 | Many level drive device |
| KR20180098494A (en) * | 2018-08-21 | 2018-09-04 | 주식회사 경신 | Device for protecting the short-circuit of the motor for vehicle |
| CN109638958A (en) * | 2018-11-20 | 2019-04-16 | 许继集团有限公司 | A kind of quick exit circuit of breaker intelligent terminal and intelligent terminal |
| CN110474606A (en) * | 2019-07-22 | 2019-11-19 | 西安和光智能科技有限公司 | A kind of solar simulator charge and discharge device, method and solar simulator |
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2019
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201270500Y (en) * | 2008-07-29 | 2009-07-08 | 南京华士电子科技有限公司 | Novel IGBT driver |
| CN202978891U (en) * | 2012-12-25 | 2013-06-05 | 南京因泰莱电器股份有限公司 | Circuit realizing device used for fast starting out |
| CN205430039U (en) * | 2015-11-03 | 2016-08-03 | 乌鲁木齐化开紫光自动化系统有限公司 | Many level drive device |
| KR20180098494A (en) * | 2018-08-21 | 2018-09-04 | 주식회사 경신 | Device for protecting the short-circuit of the motor for vehicle |
| CN109638958A (en) * | 2018-11-20 | 2019-04-16 | 许继集团有限公司 | A kind of quick exit circuit of breaker intelligent terminal and intelligent terminal |
| CN110474606A (en) * | 2019-07-22 | 2019-11-19 | 西安和光智能科技有限公司 | A kind of solar simulator charge and discharge device, method and solar simulator |
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Application publication date: 20200424 |