CN202068375U - Transient voltage suppression high-power-factor rotor frequency conversion and speed regulation controller - Google Patents
Transient voltage suppression high-power-factor rotor frequency conversion and speed regulation controller Download PDFInfo
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- CN202068375U CN202068375U CN2011201599534U CN201120159953U CN202068375U CN 202068375 U CN202068375 U CN 202068375U CN 2011201599534 U CN2011201599534 U CN 2011201599534U CN 201120159953 U CN201120159953 U CN 201120159953U CN 202068375 U CN202068375 U CN 202068375U
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Abstract
The utility model provides a transient voltage suppression high-power-factor rotor frequency conversion and speed regulation controller, which consists of a rotor winding circuit, a starting circuit, a rectifying circuit, a transient voltage suppression chopping circuit, an active inversion circuit, a reactive power compensation circuit and an inversion power supply circuit, wherein the transient voltage suppression chopping circuit comprises a flat wave reactor L1, a chopping switch VS, a transient voltage suppressor TVS1, voltage boosting diodes D1 to Dn, a transient voltage suppressor TVS2 and an output capacitor Co, the chopping switch is connected in parallel with the transient voltage suppressor TVS1, the voltage boosting diode D is connected in parallel with the transient voltage suppressor TVS2, and the active inversion circuit comprises a current limiting reactor L2, a three-phase bridge type full control device insulated gate bipolar translator (IGBT) and a vacuum contactor KM3. The transient voltage suppression high-power-factor rotor frequency conversion and speed regulation controller can effectively overcome the damage to the chopping circuit caused by rotor direct current loop transient high voltage because of high-voltage networks, and the reliability of a frequency conversion and speed regulation system can be obviously improved. The reactive power compensation is adopted, and the power factor of a speed regulation system and the speed regulation performance of an electric motor are improved.
Description
Technical field
The utility model relates to high-voltage alternating induction motor drive control technology, particularly a kind of high-tension motor rotor frequency conversion speed-adjusting (or claiming the copped wave inner feedback speed-regulating) control device.
Background technology
Rotor frequency conversion speed-adjusting system is a kind of governing system in the control of high-tension winding formula asynchronous motor rotor side, it can be effectively be reverse into the slip power of rotor frequency, and power frequency is transmitted back to electrical network or motor interior is carried out recycling, so it is a kind of efficient governing system, has obtained extensive use in square torque load(ing) fields such as blower fan water pumps.
The control device of rotor frequency conversion speed-adjusting system generally all is the boost chopper that adopts IGBT to form in the rotor DC loop.IGBT is that a kind of voltage-type is controlled power electronic device entirely, has advantages such as switching frequency height, power controlling is little, on-state loss is little, so be widely used in the electric machine speed regulation field.But in governing system, from the high voltage transient of electrical network or because the motor transient state high-energy that the high-voltage fence all standing causes discharges the high pressure that produces happens occasionally, this high voltage transient that surpasses the IGBT voltage withstand class is easy to make IGBT to puncture and damages.
At present, Chang Yong way is in an IGBT circuit protective circuit in parallel or adopts the high energy piezo-resistance to absorb.The principle of protective circuit is by testing circuit testing rotor DC circuit whether the overvoltage phenomenon to be arranged, and start triggering circuit makes the conducting of protection thyristor immediately when overvoltage occurring, thereby the overvoltage energy is released, to realize the protection to IGBT.But because the climbing of high voltage transient spike is very big, voltage rises very fast; sometimes protect thyristor also not have enough time to move; IGBT is subjected to impacting with high pressure and damages, and that is to say that protective circuit does not play a protective role, and this phenomenon also often has generation in actual applications.In addition; this protective circuit seems powerless to the high voltage transient from active inversion side or grid side, because this class high voltage transient usually earlier with the booster diode reverse breakdown, makes the huge energy of boost capacitor storage release by IGBT; thereby cause that IGBT burns out, finally cause speed regulation failure.The high energy piezo-resistance is also because of former thereby very difficult protective effects such as response speed is slow, clamp factor height.
On the other hand, square torque load(ing) such as blower fan water pump reduces shaft power with rotating speed and becomes cubic relationship to descend, so the active power that motor obtains from electrical network also is lowered into the cube relation with rotating speed and descends, because the excitation of stator side is idle constant substantially in speed regulation process, the defective that the power factor of stator side descended to some extent when this just existed motor speed to reduce, and rotating speed more low power factor descend serious more.
Summary of the invention
The utility model discloses a kind of transient voltage and suppresses High Power Factor rotor frequency conversion speed-adjusting control device, and it can effectively overcome above-mentioned shortcoming.
Technical solution of the present utility model is: a kind of transient voltage suppresses High Power Factor rotor frequency conversion speed-adjusting control device, and it is made up of rotor winding circuit, start-up circuit, rectification circuit, transient voltage inhibition chopper circuit, active-inverter, reactive power compensation circuit, inverter power circuit; Described transient voltage suppresses chopper circuit (4) and comprises smoothing reactor Ll, chopping switch VS, the first Transient Voltage Suppressor TVS1, booster diode D1 ~ Dn, the second Transient Voltage Suppressor TVS2 and output capacitance Co; The end of smoothing reactor Ll connects the anodal a of rectification circuit, and the other end connects the anodal b of booster diode D1 ~ Dn, and chopping switch VS is in parallel with the first Transient Voltage Suppressor TVS1, and booster diode D1 ~ Dn is in parallel with the second Transient Voltage Suppressor TVS2; Described active-inverter comprises that current limiting reactor L2, three-phase bridge control device IGBT (VN1 ~ VN6) and vacuum contactor KM3 entirely.
In the such scheme, the described first Transient Voltage Suppressor TVS1 and the second Transient Voltage Suppressor TVS2 suppress the diode array that TVS11 ~ the TVSnm parallel connection is composed in series again by some unipolarity transient voltages.Described unipolarity transient voltage suppresses diode TVS11 ~ TVSnm and can select for use the identical transient voltage of 15kW ~ 30kW specifications and models to suppress diode.
In the such scheme, described chopping switch VS only contraryly leads the high-end copped wave module VS1 of type IGBT ~ VSn parallel connection by 1 to n; Contrary collector and emitter of leading the high-end copped wave module of type IGBT VS1 ~ VSn is connected to c point and e point respectively.
In the such scheme, described reactive power compensation circuit carries out reactive power compensation by one or more respectively according to the size of motor capacity and the degree of depth of speed governing, and can be according to practical operation situation segmentation switching, to high-tension motor than low capacity, adopt one tunnel reactive power compensation, it is made up of the building-out capacitor C61-C63 of cut-in and cut-off contactor KM5, three-phase series reactor L3, corner connection; High-tension motor to big-and-middle capacity adopts two-way or the reactive power compensation more than the two-way, the building-out capacitor C61-C63 of one route cut-in and cut-off contactor KM5, three-phase series reactor L3, corner connection forms, and the building-out capacitor C64-C66 of another route cut-in and cut-off contactor KM6, three-phase series reactor L4, corner connection forms.
In the such scheme, one of the absorption capacitor C 31 of described rectification circuit terminates at the anodal a of rectification circuit, and the other end that absorbs capacitor C 31 is connected on the negative pole k of rectification circuit.
The beneficial effects of the utility model are: adopt the two-way Transient Voltage Suppressor to be connected in parallel on IGBT and booster diode two ends respectively, can effectively overcome because the rotor DC loop high voltage transient that high-voltage fence causes to the injury that the IGBT chopper circuit causes, has significantly improved the reliability of high-voltage motor rotor frequency conversion speed-adjusting system.Adopt the capacitive reactive power compensation to significantly improve the speed adjusting performance of governing system power factor and motor.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model.
Fig. 2 is the schematic diagram of circuit 3,4,5,6 in the utility model.
Fig. 3 is the structure chart of Transient Voltage Suppressor TVS1 in the utility model, TVS2 local array.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
As shown in Figure 1, transient voltage inhibition High Power Factor rotor frequency conversion speed-adjusting control device of the present utility model is connected to form by motor rotor winding circuit 1, start-up circuit 2, rectification circuit 3, transient voltage inhibition chopper circuit 4, active-inverter 5, capacitive reactive power compensating circuit 6, inverter power circuit 7 successively.
As shown in Figure 3, Transient Voltage Suppressor TVS1, the TVS2 that the utility model adopts suppresses the array that the diode parallel connection is composed in series again by some unipolarity transient voltages, to satisfy the requirement of aspects such as maximum surge power of circuit transient state and maximum reverse operating voltage.TVS11 ~ TVSnm selects for use the identical transient voltage of 15kW ~ 30kW specifications and models to suppress diode, and the maximum reverse operating voltage is hundreds of volts.The progression m of series connection device should should allow the requirement of safe voltage to decide greater than the circuit maximum working voltage by series connection back maximum reverse operating voltage sums at different levels simultaneously less than the maximum of IGBT or booster diode D.Transient Voltage Suppressor has reaction speed fast (1 * 10
-12Advantages such as the s order of magnitude), instantaneous power is big, the clamp factor is little, the easy control of clamping voltage.
When single transient voltage suppressed the power of diode and maximum reverse operating voltage and can satisfy circuit requirement, Transient Voltage Suppressor of the present utility model also can adopt a device.
As shown in Figure 2, transient voltage suppresses chopper circuit 4 and comprises smoothing reactor Ll, chopping switch VS, the first Transient Voltage Suppressor TVS1, booster diode D1 ~ Dn, the second Transient Voltage Suppressor TVS2 and output capacitance Co; The end of smoothing reactor Ll connects the anodal a of rectification circuit, and the other end connects the anodal b of booster diode D1 ~ Dn; Chopping switch VS is in parallel with the first Transient Voltage Suppressor TVS1; Booster diode D1 ~ Dn is in parallel with the second Transient Voltage Suppressor TVS2; Transient voltage suppresses in the chopper circuit 4, only contrary lead the high-end copped wave module VS1 of type IGBT ~ VSn parallel connection according to determined chopping switch VS chopping switch by the capacity needs of controlled motor by 1 to n, the collector and emitter of IGBT is connected to c point and e point by copper coin respectively, and the positive pole of booster diode D1 ~ Dn and negative pole are connected to b point and d point by copper coin respectively; The only contrary maximum rated capacity decision of leading the concrete quantity of the high-end copped wave module of type IGBT parallel connection according to high-tension motor of n.
Transient Voltage Suppressor TVS1 and TVS2 are connected in parallel on the two ends of 1 ~ n IGBTVS1 ~ VSn and the two ends of booster diode D1 ~ Dn respectively, and the negative pole of TVS1 links to each other with the collector electrode c point of VS1 ~ VSn, and the positive pole of TVS1 links to each other with the emitter e point of VS1 ~ VSn; The positive pole of TVS2 links to each other with the anodal b point of booster diode D1 ~ Dn, and the negative pole of TVS2 links to each other with the negative pole d point of booster diode D1 ~ Dn; Negative pole d point links to each other with 1 end of boost capacitor Co, and negative pole d point also is the output of boost chopper; 2 ends of output capacitance Co are connected in the negative pole k of rectification circuit 3.Transient Voltage Suppressor select principle for use: the specified peak-pulse power of (1) asymmetric Transient Voltage Suppressor should be greater than the maximum electrical surge power that may occur in the circuit.(2) the maximum reverse operating voltage should be higher than rotor DC circuit maximum working voltage.(3) maximum clamping voltage is not more than the maximum permission safe voltage of IGBT or booster diode D.
High Power Factor technical solution of the present utility model is: introduced capacitive reactive power compensating circuit 6 before inverter 7; Reactive power compensation circuit 6 can carry out reactive power compensation by one or more respectively according to the size of motor capacity, and can be according to practical operation situation segmentation switching, to high-tension motor than low capacity, adopt one tunnel reactive power compensation, it is made up of the building-out capacitor C61-C63 of cut-in and cut-off contactor KM5, three-phase series reactor L3, corner connection; High-tension motor to big-and-middle capacity can adopt two-way or the reactive power compensation more than the two-way, adopt a route cut-in and cut-off contactor KM5, three-phase series reactor L3, the building-out capacitor C61-C63 of two-way to form, another route cut-in and cut-off contactor KM6, three-phase series reactor L4, building-out capacitor C64-C66 form; Building-out capacitor all adopts corner connection, and the reactance Rate of compensating circuit is 6%; Total compensation capacity of one or more reactive power compensation exceeds with the rated excitation reactive capability of motor stator winding.
Active-inverter 5 adopts three-phase bridges to control device IGBT(VN1 ~ VN6) carry out active inversion entirely, helps further improving the power factor of governing system.
Claims (6)
1. a transient voltage suppresses High Power Factor rotor frequency conversion speed-adjusting control device, and it is made up of rotor winding circuit (1), start-up circuit (2), rectification circuit (3), transient voltage inhibition chopper circuit (4), active-inverter (5), reactive power compensation circuit (6), inverter power circuit (7); It is characterized in that: described transient voltage suppresses chopper circuit (4) and comprises smoothing reactor Ll, chopping switch VS, the first Transient Voltage Suppressor TVS1, booster diode D1 ~ Dn, the second Transient Voltage Suppressor TVS2 and output capacitance Co; The end of smoothing reactor Ll connects the anodal a of rectification circuit (3), and the other end connects the anodal b of booster diode D1 ~ Dn, and chopping switch VS is in parallel with the first Transient Voltage Suppressor TVS1, and booster diode D1 ~ Dn is in parallel with the second Transient Voltage Suppressor TVS2; Described active-inverter (5) comprises that current limiting reactor L2, three-phase bridge control device IGBT (VN1 ~ VN6) and vacuum contactor KM3 entirely.
2. speed-regulating control device according to claim 1 is characterized in that: the described first Transient Voltage Suppressor TVS1 and the second Transient Voltage Suppressor TVS2 suppress the diode array that TVS11 ~ the TVSnm parallel connection is composed in series again by some unipolarity transient voltages.
3. speed-regulating control device according to claim 2 is characterized in that: described unipolarity transient voltage suppresses diode TVS11 ~ TVSnm and selects for use the identical transient voltage of 15kW ~ 30kW specifications and models to suppress diode.
4. speed-regulating control device according to claim 2 is characterized in that: described chopping switch VS only contraryly leads the high-end copped wave module VS1 of type IGBT ~ VSn parallel connection by 1 to n; Contrary collector and emitter of leading the high-end copped wave module of type IGBT VS1 ~ VSn is connected to c point and e point respectively.
5. according to arbitrary described speed-regulating control device among the claim 1-4, it is characterized in that: described reactive power compensation circuit (6) carries out reactive power compensation by one or more respectively according to the size of motor capacity and the degree of depth of speed governing, and can be according to practical operation situation segmentation switching, to high-tension motor than low capacity, adopt one tunnel reactive power compensation, it is made up of the building-out capacitor C61-C63 of cut-in and cut-off contactor KM5, three-phase series reactor L3, corner connection; High-tension motor to big-and-middle capacity adopts two-way or the reactive power compensation more than the two-way, the building-out capacitor C61-C63 of one route cut-in and cut-off contactor KM5, three-phase series reactor L3, corner connection forms, and the building-out capacitor C64-C66 of another route cut-in and cut-off contactor KM6, three-phase series reactor L4, corner connection forms.
6. motor speed adjusting control device according to claim 5 is characterized in that: one of the absorption capacitor C 31 of described rectification circuit (3) terminates at the anodal a of rectification circuit (3), and the other end that absorbs capacitor C 31 is connected on the negative pole of rectification circuit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201599534U CN202068375U (en) | 2011-05-18 | 2011-05-18 | Transient voltage suppression high-power-factor rotor frequency conversion and speed regulation controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201599534U CN202068375U (en) | 2011-05-18 | 2011-05-18 | Transient voltage suppression high-power-factor rotor frequency conversion and speed regulation controller |
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| CN202068375U true CN202068375U (en) | 2011-12-07 |
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| CN2011201599534U Expired - Fee Related CN202068375U (en) | 2011-05-18 | 2011-05-18 | Transient voltage suppression high-power-factor rotor frequency conversion and speed regulation controller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607164A (en) * | 2013-11-19 | 2014-02-26 | 中国矿业大学 | Device and method for processing peak voltage of winch frequency conversion speed adjusting device |
| CN112145467A (en) * | 2020-09-03 | 2020-12-29 | 山西晋城无烟煤矿业集团有限责任公司 | Controllable fan reactive compensation frequency conversion starting drive of output amount of wind |
| WO2024002248A1 (en) * | 2022-06-30 | 2024-01-04 | 施耐德电器工业公司 | Solid-state motor starter |
-
2011
- 2011-05-18 CN CN2011201599534U patent/CN202068375U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607164A (en) * | 2013-11-19 | 2014-02-26 | 中国矿业大学 | Device and method for processing peak voltage of winch frequency conversion speed adjusting device |
| CN103607164B (en) * | 2013-11-19 | 2016-05-11 | 中国矿业大学 | A kind of apparatus and method of administering winch RHVC peak voltage |
| CN112145467A (en) * | 2020-09-03 | 2020-12-29 | 山西晋城无烟煤矿业集团有限责任公司 | Controllable fan reactive compensation frequency conversion starting drive of output amount of wind |
| WO2024002248A1 (en) * | 2022-06-30 | 2024-01-04 | 施耐德电器工业公司 | Solid-state motor starter |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20130518 |