CN1060372A - Efficient energy-saving resonance-type ac motor - Google Patents
Efficient energy-saving resonance-type ac motor Download PDFInfo
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- CN1060372A CN1060372A CN91105679A CN91105679A CN1060372A CN 1060372 A CN1060372 A CN 1060372A CN 91105679 A CN91105679 A CN 91105679A CN 91105679 A CN91105679 A CN 91105679A CN 1060372 A CN1060372 A CN 1060372A
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- motor
- energy
- alternating current
- resonance
- current motor
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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
Abstract
A kind of resonance type AC motor of the present invention, feature are to use resonance theory, with a part and the capacitor formation resonant network of stator coils of motor as resonant circuit.Resonance box and shell, rotor winding, rotating shaft and base that components and parts such as capacitor are housed constitute a kind of novel motor with energy-saving effect.By tuning system, motor is under resonance or the convergence resonance condition and moves, and the change inductive load is resistive load.
Description
The invention belongs to technical field of motors.
In known energy saving motor technology, reduce the motor oneself power consumption and adopt three kinds of methods substantially: the one, reduce the internal resistance R of motor as far as possible; The 2nd, adopt high permeability material as far as possible; The 3rd, improve technological level as far as possible, reduce various magnetic resistance and frictional resistance.But energy-saving effect is all not obvious.Its reason is that the motor reactive power that load is occupied as non-resistance can not get effective utilization.In power supply circuits, for reducing apparent power, extensively the measure of adopting is at electric substation or switchgear house installation power factor compensator, in order to improve the power factor of the electrical network of having jurisdiction over.Yet this method can't change the state of concrete load away from concrete load.Concerning particular user, still do not produce energy-conservation effect.In present electrical network, be inductive load more than 70%, and motor account for wherein more than 90%.
Purpose of the present invention makes this inductive load of motor be transformed into pure or approaching pure ohmic load exactly, thereby reduces the electric current of drawing from power supply to greatest extent, reduces the required apparent power of motor operation, reaches best energy-saving effect.
The present invention realizes above-mentioned purpose according to the parallel resonance principle.As everyone knows, in lc circuit in parallel, b is received in sense
L=1/ (ω L)=1/ (2 π fL) holds b
c=ω c=2 π fc.F=fo during resonance, | b
L|=| bc|, total susceptance b=b
L+ b
c=0, when ignoring internal resistance R, total reactance X=1/ (the b) → ∞ in loop, i.e. total impedance Z=
=︱ X ︱ → ∞.Consider the existence of internal resistance R, Zo=(L)/(CR), Zo are limited maximum, and then power supply offers the electric current I o=(U)/(Zo) of resonant circuit, reach minimum.In the present invention, the inductance L of coil of stator of motor constitutes antiresonant circuit as the part of resonant circuit with capacitor C.It is designed to natural mode shape f equates with supply frequency fo, then motor just is operated under the resonance condition, forms a pure ohmic load, and making reactive power is zero, be that the power of electric motor factor is 1, the electric current in the resonant tank is Q a times of power supply supplying electric current.Realize best energy-saving effect.
The energy-conservation alternating current motor of resonant mode of the present invention is made of the resonance box that components and parts such as capacitor are housed on shell, stator winding, rotor winding, rotating shaft, base and the shell.The L of motor stator winding constitutes antiresonant circuit with the capacitor C in the resonance box, and its resonance frequency is supply frequency fo.Motor is worked under resonance or convergence resonance condition.
In the present invention, the stator coil L of monophase machine constitutes single shunt-resonant circuit with the capacitor C in the resonance box 3; Stator coil L in the three phase electric machine
1, L
2, L
3With the capacitor C in the resonance box 3
1, C
2, C
3Constitute three shunt-resonant circuits.C
T1, C
T2, C
T3Respectively with C
1, C
2, C
3In parallel.By adjusting tuning capacity C
T(or C
T1, C
T2, C
T3) it is under the resonance condition identical with supply frequency.In this case, for the three phase electric machine of different methods of attachment, the connected mode of its inductance, electric capacity is difference to some extent.In △ type connection, C
1, L
1And C
2, L
2A common port is arranged; C
2, L
2And C
3, L
3A common port is arranged; C
3, L
3And C
1, L
1A common port is arranged, three public termination powers.In wye connection, L
1, L
2, L
3, C
1, C
2, C
3A common port is arranged, L
1With C
1, L
2With C
2, L
3With C
3The non-common port of another one and connect after connect power supply.
The inductance L of considering motor is subjected to the influence that load current changes and changes, and causes the off resonance of circuit, and making it increases from the electric current that power supply is drawn, and energy-saving efficiency descends, thus tuning system is set, with assurance circuit resonance under supply frequency fo.Tuning circuit can be divided into two kinds of manual simplified and automatic tuning systems.But manual tuning 6 is to adopt power transformation electrical equipment in resonant circuit, after the off resonance by manually regulating variable capacitance C
TAutomatic tuning circuit is comparatively complicated, as shown in Figure 5, comprises energy-saving electric machine 5, manual tuning 6, checkout gear 7, error amplification device 8, automatic executing agency 9 etc.Its principle is, sends into comparison circuit after the off resonance signal is detected, with standard signal relatively after, send into actuator after offset signal is exaggerated, pushing executing mechanism is adjusted the capacitor C in the loop, makes it be operated in resonance condition at random.From practical and economic point of view, the manual tuning low-power machine, automatic tuning is suitable for the motor of high power load change at random.
The present invention will be applied to as the parallel resonance principle that signal is selected in design, manufacturing and the transformation of alternating current motor, have important theory and practical significance, according to the parallel resonance theory, the electric current of resonant tank is that the Q of power supply supplying electric current believes that (approximation) as long as manage to improve the Q value, just can greatly reduce the electric current that power supply is supplied with.Under existence conditions, preliminary Theoretical Calculation shows that power saving rate is between 30% to 60%.The inconsistent reason of power saving rate is that the motor L value R value of different capacity is different, thereby the Q value is also different, so power saving rate is also different.In the ordinary course of things, the motor power saving rate that power is big more is high more.This kind method is used for the design and the manufacturing of the identical cryomotor of structure, except that mechanical loss, consumed power not, motor can turn round under minimum input power, produces great economic benefit.
Because of the power factor Cos ψ of the energy-conservation alternating current motor of resonant mode levels off to 1, apparent power is minimized, then not only make the user reduce energy expenditure, reduce production costs, improve economic benefit, and can increase the ability that electrical network drives load greatly.Because the minimizing of starting current has also alleviated the influence to electrical network and other electric equipment, improved the running status of electrical network simultaneously.
No matter the present invention for the manufacturer of New-type electric machine, still for the technological transformation of existing motor, need not big investment and increases big cost, very easy to implement.
Description of drawings.Fig. 1 is the energy-conservation alternating current machine front view of the resonant mode of three facies tract manual tunings.The 1st, the base of motor; The 2nd, the shell of electricity; The 3rd, the resonance box of components and parts such as stator coil binding post and capacitor is housed; The 4th, the rotating shaft of motor.Wherein, A-X is coil 1(L
1) terminal; B-y is coil 2(L
2) terminal, C-z is coil 3(L
3) terminal.C
1Be and L
1Constitute the electric capacity of shunt-resonant circuit, C
T1Be this alignment of tuned circuit electric capacity; C
2Be and L
2Constitute the electric capacity of shunt-resonant circuit, C
T2Be the tuning capacity of this resonant tank, C
3Be and L
3Constitute the electric capacity of resonant tank, C
T3Be this alignment of tuned circuit electric capacity.Fig. 2 is the electrical schematic diagram of △ type connection resonant motor, and the effect of the element among the figure is equal to Fig. 1; Fig. 3 is the electrical schematic diagram of wye connection resonant motor, the same Fig. 1 of the effect of element; Fig. 4 is single-phase resonant motor electrical schematic diagram.U is a power supply; L is a stator coil inductance; C is a parallel resonance electric capacity, C
TBe tuning capacity.Fig. 5 is the energy-conservation alternating current motor functional-block diagram of automatic tuning.A, B, C are the three phase mains binding post, the 5th, and the energy-conservation alternating current motor of resonant mode; The 6th, the manual tuning system; The 7th, the checkout gear of automatic tuning system; The 8th, the error amplification device of automatic tuning system; The 9th, the actuator of automatic tuning system.
1, one Y60M2-2 type of embodiment squirrel-cage 15KW alternating current motor drives a heating boiler circulating pump, and during normal operation, the electric current that motor is drawn from power supply is that 15A occupies power 9.9KW.Change one with the energy-conservation alternating current motor of power resonance formula, its internal structure is just the same.The inductance L of this motor threephase stator coil
1=L
2=L
3=53mh, resonance under the supply frequency of fo=50Hg, then three resonant capacitances are C
1+ C
T1=C
2+ C
T2=C
3+ C
T3=190 μ f.Adopt delta connection, capacitor C
1And C
T1Be attempted by on the terminal A-x; C
2And C
T2Be attempted by on the terminal B-y.C
3And C
T3Be attempted by on the terminal C-z.Energized is adjusted tuning capacity C
T1, C
T2, C
T3, be under the same running status at water pump, make the electric current I o that draws from power supply reach minimum, then motor is just worked at resonance or near under the resonance condition.This moment, Io=7A promptly reduced to 7A from the electric current that power supply is drawn by 15A, and occupying power is 4.62KW, reduced and occupied power 5.28KW, and power saving rate is 53.3%.
Claims (10)
1, the energy-conservation alternating current motor of a kind of resonant mode is made of shell, stator winding, rotor winding, rotating shaft and base, it is characterized in that the resonance box that has components and parts such as capacitor are housed on the shell; The L of motor stator winding constitutes antiresonant circuit with the capacitor C in the resonance box, and its resonance frequency is supply frequency f
0Motor is worked under resonance or convergence resonance condition.
2, the energy-conservation alternating current motor of resonant mode according to claim 1 is characterized in that the stator winding L of three phase electric machine
1, L
2, L
3With capacitor C in the resonance box
1, C
2, C
3Constitute three shunt-resonant circuits.
3, the energy-conservation alternating current motor of resonant mode according to claim 1 is characterized in that constituting the shunt-resonant circuit for the stator winding L of monophase machine with the capacitor C in the resonance box.
4, the energy-conservation alternating current motor of resonant mode according to claim 1 is characterized in that design has tuning system, regulates tuning capacity C
T, guarantee that motor is in running under the optimum resonant state.
5, the energy-conservation alternating current motor of resonant mode according to claim 4 is characterized in that being provided with checkout gear 7, the automatic tuning system that error amplification device 8 and actuator 9 etc. constitute.
6, the energy-conservation alternating current motor of resonant mode according to claim 4 is characterized in that being provided with manual tuning system 6.
7, the energy-conservation alternating current motor of resonant mode according to claim 2 is characterized in that C
1, L
1, and C
2, L
2A common port is arranged; C
2, L
2And C
3, L
3One common port is arranged; C
3, L
3And C
1, L
1A common port (star-star-delta connection Y-Y-) is arranged.
8, the energy-conservation alternating current motor of resonant mode according to claim 2 is characterized in that C
1, C
2, C
3, L
1, L
2, L
3A common common port (Y connection) is arranged.
9, the energy-conservation alternating current motor of resonant mode according to claim 1 is characterized in that adopting the discrete resonance box, and existing alternating current motor is undergone technological transformation.
10, the energy-conservation alternating current motor of resonant mode according to claim 1 is characterized in that superconducting motor can also be according to this principle design and manufacturing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91105679A CN1060372A (en) | 1991-08-14 | 1991-08-14 | Efficient energy-saving resonance-type ac motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91105679A CN1060372A (en) | 1991-08-14 | 1991-08-14 | Efficient energy-saving resonance-type ac motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1060372A true CN1060372A (en) | 1992-04-15 |
Family
ID=4907280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91105679A Pending CN1060372A (en) | 1991-08-14 | 1991-08-14 | Efficient energy-saving resonance-type ac motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1060372A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872854A (en) * | 2014-04-03 | 2014-06-18 | 连长国 | Asynchronous motor voltage transforming circuit and asynchronous motor current transforming circuit |
| CN108923718A (en) * | 2018-09-03 | 2018-11-30 | 周彦辉 | A kind of large power high efficiency energy-saving electric machine |
-
1991
- 1991-08-14 CN CN91105679A patent/CN1060372A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872854A (en) * | 2014-04-03 | 2014-06-18 | 连长国 | Asynchronous motor voltage transforming circuit and asynchronous motor current transforming circuit |
| CN103872854B (en) * | 2014-04-03 | 2017-05-03 | 连长国 | Asynchronous motor voltage transforming circuit |
| CN108923718A (en) * | 2018-09-03 | 2018-11-30 | 周彦辉 | A kind of large power high efficiency energy-saving electric machine |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |