CN204258288U - The rotor-side variable frequency device major loop preventing high-voltage fence all standing from causing chopper to damage - Google Patents
The rotor-side variable frequency device major loop preventing high-voltage fence all standing from causing chopper to damage Download PDFInfo
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- CN204258288U CN204258288U CN201420828586.6U CN201420828586U CN204258288U CN 204258288 U CN204258288 U CN 204258288U CN 201420828586 U CN201420828586 U CN 201420828586U CN 204258288 U CN204258288 U CN 204258288U
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Abstract
Name of the present utility model is called the rotor-side variable frequency device major loop preventing high-voltage fence all standing from causing chopper to damage.Belong to electric machine speed regulation technical field.Be intended to solve the problem that existing coiling type asynchronous motor rotor frequency converter causes motor transient state high energy to discharge to produce high pressure and cause chopper to damage at speed regulation process mesohigh electrical network all standing.Its principal character is: at high-power protection controllable silicon and the BOD protection module of the parallel connection of chopper two end; Silicon controlled negative electrode connects the E pole of insulated gate bipolar transistor, and silicon controlled anode connects the C pole of insulated gate bipolar transistor, and silicon controlled trigger electrode connects the gate pole trigger end of BOD protection module; BOD protection module negative terminal connects the C pole of insulated gate bipolar transistor, and BOD protection module anode connects the E pole of insulated gate bipolar transistor.It is convenient that the utility model has transformation, low cost and other advantages.
Description
Technical field
The utility model belongs to electric machine speed regulation technical field, relates to motor speed control device, especially a kind of high-voltage alternating coiling type asynchronous motor rotor RHVC.
Background technology
Regulation device belongs to tandem control technical field in early days, and the proposition along with the development boost chopper model of power electronic device makes rotor-side variable frequency obtain to develop fast.
The rotor-side variable frequency device that current high-tension winding formula motor uses is all adopt based on boost chopper, realizes stepless speed regulation by control IGBT duty ratio.The 5SNE0800M**0100 voltage withstand class that the FD800R**KE3-B2 that rotor-side variable frequency major loop boost chopper mainly adopts scientific & technical corporation of Infineon to produce or ABB AB produce is 1700V(3300V) IGBT module (breaker structure).In rotor-side variable frequency device speed regulation process, the motor transient state high-energy release generation high voltage caused due to high-voltage fence all standing happens occasionally, and this high voltage transient exceeding IGBT module voltage withstand class is easy to make IGBT module puncture and damage.In existing rotor-side variable frequency protective loop, mostly adopt DC partial voltage testing circuit to judge overvoltage; a high level signal is exported to controller PLC input port after detection voltage exceedes set point; PLC exports rapidly and turns at full speed or halt command control contactor deciliter, excision chopper.But because the climbing of rotor-side high voltage transient spike is very large, voltage rise is very fast and the response speed of PLC and the responsiveness of contactor are restricted, when not also being able to do in time excision major loop, IGBT module is subject to impacting with high pressure and damages, this kind of high voltage transient is usually first by booster diode reverse breakdown, the huge energy that boost capacitor is stored is unloaded by IGBT module and is put, thus causes IGBT module to burn out.This employing voltage-dividing detection circuit judges that the obvious difficulty of overvoltage method plays the effect of protection chopper.
Summary of the invention
The purpose of this utility model mainly overcomes the deficiencies in the prior art, the climbing solving existing AC Asynchronous motor rotor frequency conversion speed-adjusting control device rotor side high voltage transient spike when electrical network all standing is large, protection not in time, IGBT module is subject to the flimsy problem of impacting with high pressure.The major loop that the utility model relates to has that transformation is convenient, cost is low, extend IGBT module useful life, do not affect the features such as equipment normally runs.
Technical solution of the present utility model is: a kind of rotor-side variable frequency device major loop preventing high-voltage fence all standing from causing chopper to damage, it comprises rotor winding, logic switch contactor, water resistance starting unit, the uncontrollable rectification unit of three-phase bridge, afterflow reactor, the chopper be made up of insulated gate bipolar transistor, storage capacitor, smoothing reactor, three-phase active inverter, fuse, sensor, it is characterized in that: the high-power protection controllable silicon and the BOD protection module that are also included in the parallel connection of chopper two end; Described silicon controlled negative electrode connects the E pole of insulated gate bipolar transistor, and silicon controlled anode connects the C pole of insulated gate bipolar transistor, and silicon controlled trigger electrode connects the gate pole trigger end of BOD protection module; Described BOD protection module negative terminal connects the C pole of insulated gate bipolar transistor, and BOD protection module anode connects the E pole of insulated gate bipolar transistor.
The model of the insulated gate bipolar transistor described in technical solution of the present utility model is KP800A/1500V, and protection electric pressure is 1700V; Or model is KP800A/3000V, protection electric pressure is 3300V.
In BOD protection module described in technical solution of the present utility model, IGBT module is composed in series by 5 P3100E transient voltage suppressor, divider resistances, wherein, every P3100E transient voltage suppressor is all parallel with grading resistor, divider resistance is connected with circuits for triggering, protection voltage withstand class is 1700V, realizes over-voltage protection function; Or be composed in series by 10 P3100E transient voltage suppressor, divider resistances, wherein, every P3100E transient voltage suppressor is all parallel with grading resistor, and divider resistance is connected with circuits for triggering, and protection voltage withstand class is 3300V.
The utility model does not need to adjust existing rotor-side variable frequency major loop device in implementation process, is only used in a chopper or insulated gate bipolar transistor two end controllable silicon VT in parallel and BOD protection module.
Protection philosophy of the present utility model is that main circuit voltage exceedes transient voltage suppressor reverse breakdown voltage instantaneously and makes the action of BOD protection module when rotor-side variable frequency is at running mesohigh electrical network all standing; thus rapid triggering controlled silicon conducting; transient overvoltage is applied on other electric components, and then protects chopper or insulated gate bipolar transistor.
Because the utility model design have employed technique scheme, efficiently solve existing high-tension winding formula AC asynchronous motor regulation device high voltage transient spike climbing when high-voltage fence all standing large, PLC be not also able to do in time action time chopper or insulated gate bipolar transistor be subject to the flimsy problem of impacting with high pressure.The technology that this utility model relates to is through repeatedly on-the-spot checking on probation; its result shows that it has simple and practical, available protecting chopper compared with the prior art or insulated gate bipolar transistor extends the advantages such as its life-span, is applicable to various wound AC motor.
Accompanying drawing explanation
Fig. 1 is major loop figure of the present utility model.
Fig. 2 is BOD protection module schematic diagram.
Fig. 3 is insulated gate bipolar transistor terminal figure.
In figure, each label is: logic switch contactor KM1-4, water resistance starting unit YQ, three-phase bridge uncontrollable rectification unit ZL, afterflow reactor L1, storage capacitor C, smoothing reactor L2, three-phase active inverter NB, fuse FU, transducer CG, high-power protection controllable silicon VT, insulated gate bipolar transistor IGBT, booster diode D.
Embodiment
Below in conjunction with accompanying drawing and example, the utility model is described in further detail.
As shown in Figure 1, the utility model major loop comprises rotor winding M, logic switch contactor KM1-4, water resistance starting unit YQ, three-phase bridge uncontrollable rectification unit ZL, afterflow reactor L1, chopper, storage capacitor C, smoothing reactor L2, three-phase active inverter NB, fuse FU1-3, transducer CG, high-power protection controllable silicon VT, BOD protection module, insulated gate bipolar transistor IGBT, booster diode D.The negative electrode of controllable silicon VT connects the E pole of IGBT module; silicon controlled anode connects the C pole of IGBT module; the trigger electrode of controllable silicon VT connects the gate pole trigger end g of BOD protection module; BOD protection module (-) end connects the C pole of insulated gate bipolar transistor IGBT, and BOD protection module (+) end connects the E pole of insulated gate bipolar transistor IGBT.
As shown in Figure 2, the BOD protection module that the utility model adopts is composed in series by 5 P3100E transient voltage suppressor TVS1 ~ TVS5, and the protection voltage of every TVS pipe is 300V, and after series connection, protection voltage increases to 1500V.Resistance R1 ~ R5 is grading resistor, and guarantee that direct voltage is all assigned in 5 TVS pipe, the voltage that every TVS pipe is born is identical.Divider resistance R8 is connected with the circuits for triggering be made up of diode D1, D2 and resistance R9.
Contactor KM2 and KM3 adhesive in rotor-side variable frequency device major loop, KM1 and KM4 disjunction, now rotor-side variable frequency device is in speed governing state, and the pressure drop of resistance R8 bis-end is less than controllable silicon VT gate trigger voltage VGT under normal circumstances, and now controllable silicon cannot conducting.
When occurring that in rotor-side variable frequency device speed regulation process high-voltage fence all standing produces high voltage transient spike more than BOD protection module protection value; transient voltage suppressor TVS1 as shown in Figure 2 ~ TVS5 will by moment reverse breakdown conducting; now resistance R6-8 bears high voltage transient; the voltage of resistance R8 bis-end exceedes controllable silicon VT gate trigger voltage VGT thus rapid conducting controllable silicon VT; overvoltage is applied on other electric components; thus protection chopper, controllable silicon constant conduction is until rotor side energy discharges rear automatic cut-off completely.
As shown in Figure 3, for IGBT module terminal figure, terminal G are gate pole trigger end, terminal E is insulated gate bipolar transistor emitter, and terminal C is insulated gate bipolar transistor collector electrode, and terminal C2 is backward diode negative electrode, and terminal E2 is backward diode anode.
Claims (3)
1. the rotor-side variable frequency device major loop preventing high-voltage fence all standing from causing chopper to damage, it comprises rotor winding, logic switch contactor (KM1-4), water resistance starting unit (YQ), the uncontrollable rectification unit of three-phase bridge (ZL), afterflow reactor (L1), the chopper be made up of insulated gate bipolar transistor (IGBT), storage capacitor (C), smoothing reactor (L2), three-phase active inverter (NB), fuse, transducer (CG), it is characterized in that: the controllable silicon (VT) and the BOD protection module that are also included in the parallel connection of chopper two end, the negative electrode of described controllable silicon (VT) connects the E pole of insulated gate bipolar transistor (IGBT), the anode of controllable silicon (VT) connects the C pole of insulated gate bipolar transistor (IGBT), and the trigger electrode of controllable silicon (VT) connects gate pole trigger end (g) of BOD protection module, described BOD protection module negative terminal (-) connects the C pole of insulated gate bipolar transistor (IGBT), and BOD protection module anode (+) connects the E pole of insulated gate bipolar transistor (IGBT).
2. the rotor-side variable frequency device major loop preventing high-voltage fence all standing from causing chopper to damage according to claim 1, is characterized in that: the model of described insulated gate bipolar transistor (IGBT) is KP800A/1500V; Or model is KP800A/3000V.
3. the rotor-side variable frequency device major loop preventing high-voltage fence all standing from causing chopper to damage according to claim 1 and 2, it is characterized in that: in described BOD protection module, IGBT module is composed in series by 5 P3100E transient voltage suppressor (TVS1 ~ TVS5), divider resistance (R6-8), wherein, every P3100E transient voltage suppressor is all parallel with grading resistor (R1 ~ R5), and divider resistance (R6-8) is connected with circuits for triggering; Or be composed in series by 10 P3100E transient voltage suppressor, divider resistances, wherein, every P3100E transient voltage suppressor is all parallel with grading resistor, and divider resistance is connected with circuits for triggering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420828586.6U CN204258288U (en) | 2014-12-24 | 2014-12-24 | The rotor-side variable frequency device major loop preventing high-voltage fence all standing from causing chopper to damage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420828586.6U CN204258288U (en) | 2014-12-24 | 2014-12-24 | The rotor-side variable frequency device major loop preventing high-voltage fence all standing from causing chopper to damage |
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| CN204258288U true CN204258288U (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420828586.6U Active CN204258288U (en) | 2014-12-24 | 2014-12-24 | The rotor-side variable frequency device major loop preventing high-voltage fence all standing from causing chopper to damage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831141A (en) * | 2019-03-28 | 2019-05-31 | 大庆市易瑞达环保科技有限公司 | Energy saver is presented in chopping regulating speed |
| CN110632492A (en) * | 2019-10-12 | 2019-12-31 | 盐田国际集装箱码头有限公司 | Portable IGBT tester |
-
2014
- 2014-12-24 CN CN201420828586.6U patent/CN204258288U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831141A (en) * | 2019-03-28 | 2019-05-31 | 大庆市易瑞达环保科技有限公司 | Energy saver is presented in chopping regulating speed |
| CN110632492A (en) * | 2019-10-12 | 2019-12-31 | 盐田国际集装箱码头有限公司 | Portable IGBT tester |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |