CN201234175Y - Wound type asynchronous motor with low speed regulating loss and speed regulating device - Google Patents
Wound type asynchronous motor with low speed regulating loss and speed regulating device Download PDFInfo
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- CN201234175Y CN201234175Y CNU2008200778427U CN200820077842U CN201234175Y CN 201234175 Y CN201234175 Y CN 201234175Y CN U2008200778427 U CNU2008200778427 U CN U2008200778427U CN 200820077842 U CN200820077842 U CN 200820077842U CN 201234175 Y CN201234175 Y CN 201234175Y
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Abstract
A winding asynchronous motor with low speed regulation loss belongs to the technical field of motors, and aims to solve the problem of speed regulation loss. The technical proposal is that the winding asynchronous motor consists of a stator, a three-phase stator winding, a rotor, a rotor winding and a slip ring. The stator winding adopts an ordinary three-phase winding structure; the rotor winding comprises two sets of three-phase windings, namely a winding capable of regulating the speed and a winding incapable of regulating the speed, which are installed on the rotor side by side; the tail ends of the windings which can regulate the speed are connected in star; the head ends thereof are connected with an external circuit through a corresponding slip ring on the rotor; and the head ends and the tail ends of phases of the winding which can not regulate the speed are in short connection. The utility model also provides a corresponding speed regulation device. The utility model enables the current traveling through a speed regulation circuit and the slip ring to be greatly reduced, thereby reducing the loss and prolonging the service life of the slip ring. In addition, the stored energy is returned to a power grid through an inverter, thereby further improving the energy saving effect.
Description
Technical field
The utility model relates to a kind of improved wire wound asynchronous motor and string utmost point speed-regulating control device thereof, belongs to the motor technology field.
Background technology
Wire wound asynchronous motor is widely used in the industrial production, and its variable speed energy saving control has important economic value.The mode of speed regulation of asynchronous motor mainly contains frequency control and the speed governing of the string utmost point, and the speed governing of the string utmost point is to realize by the rotor current of control motor.Because the voltage of rotor side is low, control circuit is simple, is easy to realize, so the string utmost point speed governing of wire wound asynchronous motor has good application prospects.But, the electric current of coiling type asynchronous motor rotor side is bigger, must flow through slip ring and current regulating device of rotor current during string utmost point speed governing, this not only can make the loss of asynchronous motor increase, efficient reduces, but also can accelerate slip ring wearing and tearing, and shortening its useful life, this is to go here and there the existing major defect of utmost point speed regulating control wire wound asynchronous motor at present.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of has the wire wound asynchronous motor of low speed governing loss when string utmost point speed regulating control, and provides the speed regulating device of this motor.
Problem described in the utility model realizes with following technical proposals:
A kind of wire wound asynchronous motor of low speed governing loss is made up of stator, threephase stator winding, rotor, rotor winding and slip ring, and described stator winding adopts common three-phase winding construction; Described rotor winding comprises that being installed on epitrochanterian two side by side overlaps three phase windings, is respectively speed governing winding and not speed governing winding, the terminal star-like connection of described speed governing winding, and each head end is connected with external circuitry through epitrochanterian corresponding slip ring respectively; The head end of described each phase of not speed governing winding and terminal short circuit.
A kind of speed regulating device of wire wound asynchronous motor of low speed governing loss, it comprises wire wound asynchronous motor and speed-regulating control circuit two parts, each several part is constructed as follows:
A. wire wound asynchronous motor
It is made up of stator, threephase stator winding, rotor, rotor winding and slip ring, and described stator winding adopts common three-phase winding construction; Described rotor winding comprises that being installed on epitrochanterian two side by side overlaps three phase windings, is respectively speed governing winding and not speed governing winding, the terminal star-like connection of described speed governing winding, and each head end is connected with external circuitry through epitrochanterian corresponding slip ring respectively; The head end of described each phase of not speed governing winding and terminal short circuit.
B. speed-regulating control device
It is made up of rectification circuit, energy-storage travelling wave tube, chopper circuit and inverter, and described energy-storage travelling wave tube is an inductance L
1And capacitor C
2The output of described rectification circuit is connected to inductance L
1And capacitor C
2, in capacitor C
2The copped wave pipe of two ends parallel connection chopping circuit and the input of inverter, the output of inverter is connected to three phase mains.
The speed regulating device of the wire wound asynchronous motor of above-mentioned low speed governing loss are set up inductance L at the input of inverter
3, in inductance L
1And capacitor C
2Between set up isolating diode D1.
The speed regulating device of the wire wound asynchronous motor of above-mentioned low speed governing loss are in the output and the capacitor C of rectification circuit
2Between one or more chopper circuits in parallel.
Rotor of the present utility model adopts two three phase windings, and one of them three phase winding is connected with slip ring as the speed governing winding, another winding as common asynchronous moter with winding short circuit from beginning to end.Speed-regulating control circuit is only regulated the electric current in this three phase winding, and the electric current that flows through speed-regulating control circuit and slip ring is reduced greatly, has both reduced loss, has improved the useful life of slip ring again; Rotor current is regulated control circuit and is adopted chopper circuit that rotor current is regulated, and will be stored in energy feedback grid in the inductance with inverter, can further improve energy-saving effect.Compare with traditional wire wound asynchronous motor, the utility model is the efficient height not only, and slip ring is not easy to wear, long service life.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the utility model rotor winding structure schematic diagram;
Fig. 2 is the electrical schematic diagram of alignment circuit.
Each label is among the figure: a1, b1, c1, rotor three-phase speed governing winding head end, x1, y1, z1, rotor three-phase speed governing winding end, a2, b2, c2, not speed governing of rotor three-phase winding head end, x2, y2, z2, not speed governing of rotor three-phase winding end, N, speed governing winding common point slip ring contact, a, b, c, slip ring contact, ZQ, full-wave rectification bridge, IGBT1, IGBT2, copped wave pipe, C
1, C
2, electric capacity, L
1, L
2, L
3, inductance, D1, D2, isolating diode, NBQ, inverter.
Embodiment
Referring to Fig. 1, the utility model proposes a kind of rotor structure that two covers, three phase windings are installed side by side on rotor, wherein corresponding slip ring connection on head end a1, the b1 of a cover, c1 and the rotor claims that this three phase winding is the speed governing winding; Head end a2, the b2 of an other cover, c2 be its terminal short circuit respectively, claims this three phase winding to be not speed governing winding.Three-phase speed governing winding is distributed in the rotor according to identical arrangement mode side by side with not speed governing of three-phase winding, and not speed governing winding is equivalent to the direct short-circuit of rotor winding, and the electric current of its winding is by the equation of motion decision of motor itself.The electric current of speed governing winding is drawn through slip ring, and the electric current in the speed governing winding is connected to that (speed governing winding common point slip ring contact N gives among the embodiment useless at accompanying drawing, need not connect in the rotor current regulating circuit in alignment circuit; If when rotor adjusting winding adopted three single-phase rectification bridges to carry out rectification, this common point N can use, promptly N only is ready for use in the future different rectifier systems).Because the loss that produces on slip ring and switch control device all becomes a square proportional relation with the electric current that it passes through, when electric current reduces by a half, loss will reduce to original 1/4th; So adopt the structure of above-mentioned pair of three-phase rotor winding, rotor current two parts have been divided into, in the rotor regulating circuit so therefore the just part rotor current of controlling can significantly reduce the loss of rotor winding projected current on slip ring and chopping switch device.
Stator winding of the present utility model is general three-phase winding construction, and is identical with the stator winding of general asynchronous machine.
Referring to Fig. 2, the three-phase slip-ring that will link to each other with the rotor speed regulation winding is received three inputs of full-wave rectification bridge ZQ, capacitor C
1Be filter capacitor, the cathode output end of full-wave rectification bridge ZQ meets copped wave device IGBT1 and IGBT2 through inductance L 1 and inductance L 2 respectively; Diode D1, D2 are isolating diode, and their negative pole is through filter capacitor C
2And inductance L
3Connect the input of inverter (NBQ); The output of inverter is connected to the power supply of three-phase alternating current 380V.
In Fig. 2, adopted the circuit structure of parallel connection chopping device, can further reduce the switching loss of copped wave device according to different rotating speed operational modes.When not needing speed governing, control copped wave device IGBT1 and IGBT2 are in conducting state, and the speed governing winding is in short-circuit condition, and the speed governing winding all has induced current to produce in speed governing winding and not speed governing winding with not speed governing winding is not similar.When the needs speed governing, according to different loading condictions, utilize the high-frequency PWM signal to make an IBGT copped wave pipe or two copped wave pipes be operated on off state, when the scope that needs speed governing hour, only need make an IBGT copped wave pipe be operated on off state, then the copped wave device switching loss that produces this moment is also just minimum.
IGBT1 is operated on off state when the copped wave pipe, and when being in out (being conducting) state, rectifier bridge can be to inductance L
1Charge, i.e. inductance L
1Magnetic field energy will increase, the magnetic field energy that increases in the inductance L 1 derives from the magnetic field energy in the three-phase speed governing winding on the rotor; When copped wave pipe IGBT1 is in pass (promptly disconnecting) state, since the magnetic linkage conservation principle, inductance L
1Electric current can not undergo mutation inductance L
1In electric current can through diode D1 to capacitor C
2Charge, i.e. inductance L
1Magnetic field energy will reduce capacitor C
2Electric field energy will increase; Capacitor C
2The electric field energy of last increase can convert the three-phase alternating current electric energy to by inverter and deliver in the three phase network of 380V.By the work of above copped wave pipe IGBT1, realized the magnetic field energy in the speed governing winding on the rotor is taken out, promptly reduced the mechanical energy of rotor output, reached the effect of regulating motor speed.
Claims (4)
1, a kind of wire wound asynchronous motor of low speed governing loss is characterized in that, it is made up of stator, threephase stator winding, rotor, rotor winding and slip ring, and described stator winding adopts common three-phase winding construction; Described rotor winding comprises that being installed on epitrochanterian two side by side overlaps three phase windings, is respectively speed governing winding and not speed governing winding, the terminal star-like connection of described speed governing winding, and each head end is connected with external circuitry through epitrochanterian corresponding slip ring respectively; The head end of described each phase of not speed governing winding and terminal short circuit.
2, a kind of speed regulating device of wire wound asynchronous motor of low speed governing loss, it comprises wire wound asynchronous motor and speed-regulating control circuit two parts, each several part is constructed as follows:
A. wire wound asynchronous motor
It is made up of stator, threephase stator winding, rotor, rotor winding and slip ring, and described stator winding adopts common three-phase winding construction; Described rotor winding comprises that being installed on epitrochanterian two side by side overlaps three phase windings, is respectively speed governing winding and not speed governing winding, the terminal star-like connection of described speed governing winding, and each head end is connected with external circuitry through epitrochanterian corresponding slip ring respectively; The head end of described each phase of not speed governing winding and terminal short circuit.
B. speed-regulating control device
It is made up of rectification circuit, energy-storage travelling wave tube, chopper circuit and inverter, and described energy-storage travelling wave tube is an inductance L
1And capacitor C
2The output of described rectification circuit is connected to inductance L
1And capacitor C
2, in capacitor C
2The copped wave pipe of two ends parallel connection chopping circuit and the input of inverter, the output of inverter is connected to three phase mains.
3, according to the speed regulating device of the wire wound asynchronous motor of the described low speed governing loss of claim 2, it is characterized in that, in the output and the capacitor C of rectification circuit
2Between one or more chopper circuits in parallel.
4, according to the speed regulating device of the wire wound asynchronous motor of claim 2 or 3 described low speed governing losses, it is characterized in that, in the output and the capacitor C of rectification circuit
2Between one or more chopper circuits in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200778427U CN201234175Y (en) | 2008-07-11 | 2008-07-11 | Wound type asynchronous motor with low speed regulating loss and speed regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200778427U CN201234175Y (en) | 2008-07-11 | 2008-07-11 | Wound type asynchronous motor with low speed regulating loss and speed regulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201234175Y true CN201234175Y (en) | 2009-05-06 |
Family
ID=40620563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200778427U Expired - Fee Related CN201234175Y (en) | 2008-07-11 | 2008-07-11 | Wound type asynchronous motor with low speed regulating loss and speed regulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201234175Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820849A (en) * | 2011-06-10 | 2012-12-12 | 中国石油天然气股份有限公司 | Variable frequency speed regulating method for multiple water injection pumps in oilfield water injection station |
-
2008
- 2008-07-11 CN CNU2008200778427U patent/CN201234175Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820849A (en) * | 2011-06-10 | 2012-12-12 | 中国石油天然气股份有限公司 | Variable frequency speed regulating method for multiple water injection pumps in oilfield water injection station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20090506 Termination date: 20120711 |