CN200962525Y - Dynamic compensation controller of the coiling electromotor power factor - Google Patents
Dynamic compensation controller of the coiling electromotor power factor Download PDFInfo
- Publication number
- CN200962525Y CN200962525Y CNU2006200468370U CN200620046837U CN200962525Y CN 200962525 Y CN200962525 Y CN 200962525Y CN U2006200468370 U CNU2006200468370 U CN U2006200468370U CN 200620046837 U CN200620046837 U CN 200620046837U CN 200962525 Y CN200962525 Y CN 200962525Y
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- Prior art keywords
- contactor
- power factor
- dynamic compensation
- circuit
- compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
A controller of power factor dynamic compensation with wound-rotor motor comprises a transformer (TM), a compensation contactor (KM2) and a direct current driven element circuit. The dynamic compensation controller further comprises a closed-loop control circuit composed of a pull-out contactor (KM4) and a loading detection circuit, with the two ends of the three sets of main contacts of the pull-out contactor (KM4) connected in parallel with outlet of the direct current driven element circuit (ZT). The dynamic compensation controller aims at the frequent shock loading, prevents the frequent loading switching of other main contactors, enhances the switched ability, extends the service life of switching frequent motion, improves the loading capability and realizes stable operation. The utility model has the advantages of easy control, low production cost and high reliability, mainly used for dynamic power factor compensation of wound rotor asynchronous motors under varying duty service.
Description
Technical field
The utility model relates to the power factor compensation main circuit under a kind of motor power (output) the factor dynamics compensation circuits, particularly varying load.Belong to compensation of motor power (output) factor and field of energy-saving technology.
Background technology
China's utility application " wire wound asynchronous motor power factor compensation main circuit " (patent No.: a kind of motor power (output) factor main compensation circuit that 03241179.0) provides, form by transformer, fling-cut switch and DC excitation circuit, have that main circuit is simple, control is convenient, cost is low, reliability is high, underloading improves the remarkable and energy-saving and cost-reducing characteristics of power factor.But for milling train class impact varying duty, because underloading and heavily loaded load condition change frequent, the power factor of motor self-operating is significantly different, requirement to compensation is also obviously different, crosses the phenomenon that benefit even step-out, motor irregular operation have a strong impact on system's operate as normal when compensation effect is good, heavily loaded when underloading occurring.Realize that with bidirectional triode thyristor quick soft operation/cutting method is insufficient and this patent is disclosed, and owing to be in the rotor loop, because of the controllable silicon on state resistance is big etc., in actual motion, can not guarantee the work of cut-offfing normally, can not overcome problems such as the normal stable speed operation of heavy duty.
Summary of the invention
Goal of the invention of the present utility model provides a kind of simple in structure, convenient reliable, raising power factor energy fast adaptation load variations stable operation of control, to overcome the wound-rotor motor power factor dynamic compensation controller of prior art deficiency.
Technical solution of the present utility model is: a kind of wound-rotor motor power factor dynamic compensation controller, comprise transformer (TM), compensation contactor (KM2) and DC excitation element circuit (ZT), it is characterized in that: described dynamic compensation controller also comprises one by withdrawing from contactor (KM4) and the close loop control circuit that load detecting circuit is formed, and the described main contact that withdraws from contactor (KM4) is in parallel with the output of DC excitation element circuit (ZT).
Two terminations of three groups of main contacts that withdraw from contactor (KM2) described in the technical solution of the present utility model, its two ends formation in parallel respectively.
Load detecting circuit described in the technical solution of the present utility model is made up of current transformer (TA) and signal transmitting device (ZB), and current transformer (TA) detects the size of asynchronous motor running current; The input of signal transmitting device (ZB) links to each other with the output signal of current transformer (TA), and signal transmitting device (ZB) output signal links to each other with the coil that withdraws from contactor (KM4).
DC excitation element circuit (ZT) described in the technical solution of the present utility model adopts three-phase half controlled bridge formula rectification circuit to regulate.
Adopt technique scheme, compared to existing technology, increased by one be used for heavily loaded switching withdraw from contactor and be used for the load condition testing circuit of fast detecting, at the frequent impact load, heavy duty is withdrawed from compensation and the time has been avoided KM1, KM2 frequently to switch issuable big electric current, the problem such as open circuit in short-term of comprising.Can do a use mutually after three groups of main contact parallel connections owing to withdraw from contactor, strengthen its connecting-disconnecting function greatly, improve the life-span of switching frequent movement, make that asynchronous motor was in synchronous operation when load was light, power factor compensation is obvious; Then withdraw from automatically during heavy duty, the motor asynchronous operation improves overload capacity, realizes stable operation.Have the low and high reliability features of cost, guarantee motor safety, continuous reliability service.Withdraw from the operating state of contactor KM4 simultaneously and adapt to load variations with load detecting circuit composition close loop control circuit in good time, avoided numerous the cut-offfing of other main contactor band carrier frequency, can realize quick shutoff, the switching of asynchronous motor compensation circuit, improve the overload capacity under the varying load.The utility model is mainly used in wire wound asynchronous motor power factor dynamic compensation under the varying duty operating state.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is elaborated:
Fig. 1 is a schematic block circuit diagram of the present utility model.
Fig. 2 is a kind of embodiment of the utility model circuit.
Embodiment
Connect 380～10000V power supply as shown in Figure 1 and Figure 2 on wire wound asynchronous motor M stator winding, its rotor winding is connected with starter ZYQ through K switch M1.Starter ZYQ can be a frequency sensitive trheostat, also can be liquid rheostat or other starting equipment.Two terminations that contactor KM1 draws after with three phase winding two-phase parallel connections are connected with the dc output end of DC excitation element circuit (ZT), one group of exit of the input of DC excitation element circuit (ZT) and the secondary of transformer TM links to each other, and the former limit of transformer TM links to each other with the control power supply by contactor KM3.During main motor M starting, K switch M1 work, starter ZYQ inserts rotor loop; After starting was finished, starter ZYQ excised starting unit automatically, and motor M enters the asynchronous operation state.When carrying out the power factor compensation operation, contactor KM2 work, K switch M1 disconnects, and rotor loop and starting equipment are disconnected; Contactor KM3 work simultaneously, insert ac low-voltage power supply with main motor M same frequency, the three-phase half controlled bridge formula rectification circuit that the exciting voltage that provides by transformer TM and VD1, VD2, VD3, VT1, six rectifying tubes of VT2, VT3 are formed provides dc excitation power, compensation contactor KM2 through conducting is input to rotor loop, thereby change the electromagnetic property between the rotor loop, with rotor pull-in step running status; After the asynchronous motor M synchronous operation, have the associated advantages of synchronous motor and the idle power consumption of motor is fed back to electrical network and reach and reduce the wastage, improve power factor and energy-conservation purpose.By controllable silicon VT1, the VT2 that regulates DC excitation element circuit ZT, the angle of flow of VT3, the size that can regulate exciting current, thus regulate the compensation effect of power factor.Silicon controlled major loop, triggering loop and control all can be general direct current rectification circuit.The also single-phase or three-phase thyristor bridge controlled rectification circuit of described DC excitation element circuit, adopt three-phase half controlled bridge formula rectification circuit to be because this system power is generally higher, again than full control economic dispatch advantage.Described transformer secondary can have a plurality of output taps, can increase the scope of excitation voltage regulation.Described compensation contactor KM2, to withdraw from contactor KM4 be vacuum contactor, also can be common contactor or circuit breaker.
Under the compensation running status (being that KM2 works when DC excitation is provided), the load detecting loop is by the inlet wire side detection running current signal of current transformer TA from the motor operating loop, this running current output links with the input of current signal transmitter ZB, ZB carries out sending the output control signal after the signal processing through the signal transmitting device, can show running current or operate power factor etc. simultaneously.Its course of work is summarized as follows: when running current during greater than the 80%-90% of motor rated operational current, send working signal, this signal makes and withdraws from contactor KM4 coil and get electric work, thereby the overload capacity that compensation improves motor is withdrawed from short circuit motor rotor loop; When motor load operating current during less than certain value, current signal transmitter ZB sends cut-off signal, the KM4 coil losing electricity, and DC excitation element circuit ZT output DC excitation electricity recovers the compensation operation under the underloading.Make the utility model realize dynamic compensation in conjunction with load characteristic well like this, simultaneously owing to do a use mutually after withdrawing from three groups of main contact parallel connections of contactor KM4, can improve cut-offfing capacity and life-span of KM4 greatly, do not need frequent big electric current switching of KM1, KM2 in the legend and the problem of disharmony of having avoided its frequent switching to bring, improved the safe and feasible of dynamic switching.Current signal transmitter ZB described in the embodiment can be the demonstration of band numeral and shaped article such as the CD194I Current Control instrument of controlling output, also can be other products or combination, continues for known technology is no longer detailed.
Claims (4)
1, a kind of wound-rotor motor power factor dynamic compensation controller, comprise transformer (TM), compensation contactor (KM2) and DC excitation element circuit (ZT), it is characterized in that: described dynamic compensation controller also comprises one by withdrawing from contactor (KM4) and the close loop control circuit that load detecting circuit is formed, and the described main contact that withdraws from contactor (KM4) is in parallel with the output of DC excitation element circuit (ZT).
2, a kind of wound-rotor motor power factor dynamic compensation controller according to claim 1 is characterized in that described three groups of main contacts that withdraw from contactor (KM2), two terminations of formation in parallel respectively, its two ends.
3, a kind of wound-rotor motor power factor dynamic compensation controller according to claim 1, it is characterized in that described load detecting circuit is made up of current transformer (TA) and signal transmitting device (ZB), current transformer (TA) detects the size of asynchronous motor running current; The input of signal transmitting device (ZB) links to each other with the output signal of current transformer (TA), and signal transmitting device (ZB) output signal links to each other with the coil that withdraws from contactor (KM4).
4, a kind of wound-rotor motor power factor dynamic compensation controller according to claim 1 is characterized in that described DC excitation element circuit (ZT) adopts three-phase half controlled bridge formula rectification circuit to regulate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200468370U CN200962525Y (en) | 2006-10-16 | 2006-10-16 | Dynamic compensation controller of the coiling electromotor power factor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200468370U CN200962525Y (en) | 2006-10-16 | 2006-10-16 | Dynamic compensation controller of the coiling electromotor power factor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200962525Y true CN200962525Y (en) | 2007-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200468370U Expired - Fee Related CN200962525Y (en) | 2006-10-16 | 2006-10-16 | Dynamic compensation controller of the coiling electromotor power factor |
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| CN (1) | CN200962525Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113452137A (en) * | 2021-06-30 | 2021-09-28 | 科华数据股份有限公司 | Power supply control method and power supply system |
-
2006
- 2006-10-16 CN CNU2006200468370U patent/CN200962525Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113452137A (en) * | 2021-06-30 | 2021-09-28 | 科华数据股份有限公司 | Power supply control method and power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhuiri Electrical Co., Ltd., Shanghai Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Zhuiri Electrical Co., Ltd., Shanghai Document name: Notification of Termination of Patent Right |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071017 Termination date: 20151016 |
|
| EXPY | Termination of patent right or utility model |