CN103546087B - A kind of non-frequency electric capacity governing of asynchronous machine and winding connect circuit - Google Patents
A kind of non-frequency electric capacity governing of asynchronous machine and winding connect circuit Download PDFInfo
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- CN103546087B CN103546087B CN201310457470.6A CN201310457470A CN103546087B CN 103546087 B CN103546087 B CN 103546087B CN 201310457470 A CN201310457470 A CN 201310457470A CN 103546087 B CN103546087 B CN 103546087B
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Abstract
The non-frequency electric capacity governing and the winding that the invention discloses a kind of asynchronous machine connect circuit, comprise non-frequency electric capacity governing circuit and winding connecting loop; Non-frequency electric capacity governing circuit comprises three single-phase electricity containers and alignment circuit, and alignment circuit adopts three-phase commutation bridge alignment circuit or three-phase half-controlled rectifier bridge alignment circuit or single-phase rectification bridge alignment circuit; Described winding connecting loop comprises three-phase main winding and three-phase auxiliary winding, three-phase main winding and three-phase auxiliary winding adopt double winding indentation or double winding triangle or double winding Y type to connect, three-phase main winding is by alternating-current switch for connecting power end, and the end of three-phase auxiliary winding is respectively used to draw the control end connecting alignment circuit; Wherein, three single-phase electricity containers are series at the end of the zigzag three-phase main winding of double winding respectively or are series at the end of double winding triangle three-phase auxiliary winding or are parallel to double winding Y type three-phase auxiliary winding.
Description
Technical field
The present invention relates to Subject " Electric Machinery " field, the non-frequency electric capacity governing and the winding that particularly relate to a kind of asynchronous machine connect circuit.
Background technology
The speed adjusting technique of current asynchronous motor, use and have following several types more widely: stator variable voltage speed control technology is comparatively applicable to the speed governing of blower fan, load of the pumps based on electromagnetic torque T and square principle be directly proportional of its voltage U, but slip power larger during its low speed then to consume there is the larger problem of waste of energy on rotor resistance.The frequency control that voltage-type hands over a PWM handed over always to control, based on the principle that constant voltage and frequency ratio and rotating speed are changed by torque, adopt triangular carrier comparison method and control its three groups of switching devices, but it does not relate to the problem of reactive current substantially, and the switching frequency in the inversion of its rectification and 6-16KHz all will cause the problem of harmonic loss to power supply and motor.Tandem control adopts one end to connect rotor windings, and its frequency and voltage becomes, another termination power with revolutional slip S, and its frequency and voltage is fixed, and makes it be suitable for S < 0.4 and the less occasion of speed adjustable range.To the reactive loss of asynchronous motor, adopting capacitor to carry out internal compensation is good way, as " Double-winding capacitance internal compansation motor " of ZL01228605.2, adopt the vice-side winding of a mutually former limit winding, a delayed phase and a phase capacitor to be linked to be a leg-of-mutton wiring, utilize the capacitor of tortuous series connection to make the electric current phasor of its main winding and auxiliary winding close to equal and improve its power factor; " the interior compensative winding of alternating current motor " of ZL03145525.5, adopt the zigzag connection of hexagon and star pattern, and in the winding segments of π/3 voltage phase angle that relatively lags behind the way of parallel single-phase capacitor, realize the symmetrical compensation of capacitance current to the inductance current in winding with this.The electric current that in these, compensation method all exists capacitor smoothly can not carry out regulating with motor load change and affects the problem of energy-saving effect.For another example, " capacitance speed regulating type wound rotor composition motor " of ZL2010200040350.2, adopt the magnetic potential phasor of control two stator winding, and then control the electromotive force of series connection two rotor windings, controlling in its no-load speed, to produce the effect regulating its rotating speed, but, also there is the comparatively large and rough problem of speed governing of main winding loss in the constant classification regulative mode with many alternating-current switchs of the voltage constant of its main winding.
Summary of the invention
The object of this invention is to provide a kind of non-frequency electric capacity governing of asynchronous machine and winding connects circuit, the rotating speed of motor can be changed to the level and smooth adjustment of electromagnetic torque, reduce winding electric energy loss, improve electric capacity governing flatness and energy-saving horizontal.
The technical solution used in the present invention is:
The non-frequency electric capacity governing of asynchronous machine and winding connect a circuit, comprise non-frequency electric capacity governing circuit and winding connecting loop; Non-frequency electric capacity governing circuit comprises three single-phase electricity containers and alignment circuit, alignment circuit adopts three-phase commutation bridge alignment circuit or three-phase half-controlled rectifier bridge alignment circuit or three single-phase rectification bridge alignment circuits, and connects at rectifier bridge direct current two ends and can turn off electronic device and carry out PWM control; Described winding connecting loop comprises three-phase main winding and three-phase auxiliary winding, three-phase main winding and three-phase auxiliary winding adopt double winding indentation or double winding triangle or the combined connection of double winding, three-phase main winding head end is connected to power end by alternating-current switch, and the main winding of three-phase is respectively used to the end of auxiliary winding the control end being connected alignment circuit; Wherein, three single-phase electricity containers are series at the head end of double winding zigzag three-phase auxiliary winding respectively or are series at the end of double winding triangle three-phase auxiliary winding or are parallel to the combined three-phase auxiliary winding of double winding.
Described double winding indentation is coupled through three single-phase electricity containers and control end connects three-phase commutation bridge alignment circuit, namely the head end of first-phase main winding connects power end by alternating-current switch, the end of first-phase main winding connects the head end of the 3rd auxiliary winding by the first single-phase electricity container, the end of the 3rd auxiliary winding connects the head end of second-phase main winding, the head end of second-phase main winding connects power end by alternating-current switch, the end of second-phase main winding connects the head end of first-phase auxiliary winding by the second single-phase electricity container, the end of first-phase auxiliary winding connects the head end of third phase main winding, the head end of third phase main winding connects power end by alternating-current switch, the end of third phase main winding connects the head end of second-phase auxiliary winding by the 3rd single-phase electricity container, the end of second-phase auxiliary winding connects the head end of first-phase main winding, the first-phase of three-phase commutation bridge alignment circuit comprises the first rectifier diode and second rectifier diode of series connection, the negative electrode of the first rectifier diode connects the collector electrode of insulated gate bipolar transistor, the anode of the second rectifier diode connects the emitter of insulated gate bipolar transistor, access the end of first-phase main winding between first rectifier diode and the second rectifier diode, the second-phase of three-phase commutation bridge alignment circuit is identical with first-phase structure with third phase.
Described double winding triangle is coupled through three single-phase electricity containers and control end connects three-phase half-controlled rectifier bridge alignment circuit, namely the head end of first-phase main winding is connected power end with the head end of first-phase auxiliary winding by alternating-current switch, the end of first-phase auxiliary winding connects third phase main winding head end by the first single-phase electricity container, the head end of second-phase main winding is connected power end with the head end of second-phase auxiliary winding by alternating-current switch, the end of second-phase auxiliary winding connects first-phase main winding head end by the second single-phase electricity container, the head end of third phase main winding is connected power end with the head end of third phase auxiliary winding by alternating-current switch, the end of third phase auxiliary winding connects second-phase main winding head end by the 3rd single-phase electricity container, each of three-phase half-controlled rectifier bridge alignment circuit includes the rectifier diode of series connection and thyristor mutually and forms the loop of direct current shorted on both ends, connects corresponding control end between rectifier diode and thyristor.
The combined connection of described double winding is by same model, with power and two rotors are linked into the mair motor in loop and auxiliary-motor forms, double winding is combined is coupled through three single-phase electricity containers and control end connects single-phase rectification bridge alignment circuit respectively, namely the head end of mair motor first-phase winding connects power end by alternating-current switch, the end of mair motor first-phase winding passes through the head end of auxiliary-motor second-phase winding switching mair motor third phase winding, the head end of mair motor third phase winding connects power end by alternating-current switch, the end of mair motor third phase winding passes through the head end of auxiliary-motor first-phase winding switching mair motor second-phase winding, the head end of mair motor second-phase winding connects power end by alternating-current switch, the end of mair motor second-phase winding passes through the head end of auxiliary-motor third phase winding switching mair motor first main winding, first single-phase electricity container is parallel to auxiliary-motor first-phase winding, second single-phase electricity container is parallel to auxiliary-motor second-phase winding, 3rd single-phase electricity container is parallel to auxiliary-motor third phase winding, single-phase rectification bridge alignment circuit comprises the identical single-phase rectification bridge alignment circuit of three groups of structures, first single-phase rectification bridge alignment circuit comprises the rectifier diode of two groups of parallel connections, often group comprises the rectifier diode of two series connection, the upper pipe often organizing the rectifier diode of series connection is connected with the anode of turn-off thyristor, lower pipe is connected with the negative electrode of turn-off thyristor, accesses the head end of mair motor first-phase winding between the rectifier diode of first group two series connection, the end of mair motor third phase winding is accessed between the rectifier diode of second group two series connection, access the head end of mair motor second-phase winding between the rectifier diode of first group two series connection of the second single-phase rectification bridge alignment circuit, between the rectifier diode of second group two series connection, access the end of mair motor first-phase winding, access the head end of mair motor third phase winding between the rectifier diode of first group two series connection of the 3rd single-phase rectification bridge alignment circuit, between the rectifier diode of second group two series connection, access the end of mair motor second-phase winding.
The present invention is by adjuster and control the voltage phasor of three-phase main winding and auxiliary winding and interior compensation condenser thereof in non-frequency mode, and then in the adjustment that electromagnetic torque is level and smooth, change the method for its rotating speed, in power factor and rotating speed two regulate, significant energy-saving effect is produced to two asynchronous motors of asynchronous motor and rotor combination.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the embodiment of the present invention 1 double winding indentation and non-frequency electric capacity governing;
Fig. 2 is the circuit theory diagrams of the embodiment of the present invention 2 double winding triangle and non-frequency electric capacity governing;
Fig. 3 is the circuit theory diagrams of the embodiment of the present invention 3 double winding combination shape and non-frequency electric capacity governing.
Embodiment
As shown in Figure 1, 2, 3, the present invention includes non-frequency electric capacity governing circuit and winding connecting loop; Non-frequency electric capacity governing circuit comprises three single-phase electricity containers and alignment circuit, and alignment circuit adopts three-phase commutation bridge alignment circuit or three-phase half-controlled rectifier bridge alignment circuit or three single-phase rectification bridge alignment circuits; Described winding connecting loop comprises three-phase main winding and three-phase auxiliary winding, three-phase main winding and three-phase auxiliary winding adopt double winding indentation or double winding triangle or the combined connection of double winding, three-phase main winding head end is by alternating-current switch for connecting power end, and the end of three-phase auxiliary winding is respectively used to draw the control end connecting alignment circuit; Wherein, three single-phase electricity containers are series at the end of double winding zigzag three-phase main winding respectively or are series at the end of double winding triangle three-phase auxiliary winding or are parallel to the combined three-phase auxiliary winding of double winding.
The present invention combines the operation principle of winding connection and feature is: the stator voltage based on asynchronous motor determines that the principle of main flux with rotor current is depended in main flux and its torque, adopt bimorph transducer winding and the mode of connection of being connected with electrical equipment by its auxiliary winding, the phasor synthesis utilizing capacitance current advanced, the relation making stator current lag behind voltage phasor changes, utilize the phasor of capacitance current and inductive current to synthesize and the inner loop process of two kinds of energy, improve power factor and the efficiency of motor greatly; The inductive load feature of asynchronous motor makes its electric current phasor lag behind voltage phasor within the scope of 30 °-60 °, to this only when the voltage phasor of capacitor is the phase angle of delayed 120 °-150 ° compared with connected winding, two electric current phasors in the stator double winding of flux coupled can be made close to same-phase, and the electric current phasor that AC power is provided is identical close to phase angle with voltage phasor; Equivalent parallel excitatory induction reactance Ⅹ in the T-shaped equivalent circuit of motor that interior compensation condenser is formed
mthe feature at two ends, can not only make its induced potential raise and stator winding leakage reactance Ⅹ
1pressure drop reduce, its magnetic hysteresis loss and harmonic loss can also be made to reduce by a relatively large margin; Because the voltage phasor of main winding is mainly controlled by power supply, the voltage phasor of its auxiliary winding depends on main winding and electric current phasor is controlled by capacitor, which forms can to main winding voltage with secondary around but two conditions regulating respectively of electric current, therefore to single motor with the rotational speed regulation regulating stator voltage mode can carry out more among a small circle, and to the rotational speed regulation that the bi-motor of combined rotor carries out in a big way in the phase shift mode of stator voltage; The rotating magnetic field of asynchronous machine can make the induced potential phase place of auxiliary winding with main winding substantially identical or difference certain angle, capacitance current in auxiliary winding certainly will flux coupled through between two windings and affect the electric current of main winding, and phasor synthesis can reduce the current effective value that power supply provides greatly thus; For two rotor rigid attachment and winding is linked into the composition motor in loop, utilize it to two stator winding i.e. adjusting amplitude but also shift two regulatory functions of its voltage-phase, define the condition that combined rotor electromotive force is controlled by two stator winding magnetic potentials, impel rotor current to change by the change of its composite magnetic power phasor complications, and then change the ideal no-load speed of asynchronous machine by the change of rotor windings induced potential.
The principle of control of the present invention and speed governing is: connecting one at the positive and negative two ends of rectifier bridge in positive termination positive pole mode may power-off power device T
1the adjuster formed, the change of current can be replaced and turn-off device carries out pulse width control with upper frequency with rectifying tube, the adjustment of voltage continuous print is carried out to disjunct three neutral ends (end) of three-phase main winding, and directly or indirectly the voltage phasor of three capacitors is controlled, the combination wiring of such as Fig. 1, via the T of two rectifying tubes and transient switching
1pipe, makes two ends of main winding close, and at T
1after pipe disconnects instantaneously, the winding that it is through-flow still can continue through-flow via single-phase electricity container, the A for another example in Fig. 1
1-W
a1-A
0-C
01-W
c2-B
1series arm, its W under the effect of rotational voltage
a1comparatively W
c2the voltage phasor of winding remains the relation of delayed 2/3 π phase angle, and at T
1in the control that conducting width increases, two windings shift to advanced direction gradually, C
01voltage phasor then to the transfer of delayed direction and respectively close to phase voltage value; When condenser capacity value is chosen as the 40%-60% of motor nameplate performance number, the magnitude of voltage of major-minor winding about rises to rated value Uh gradually from 70%Uh, makes the corresponding growth of the rotating speed of fan-type motor; The pulse width modulation (PWM) that adjuster adopts is relatively simple, the isoceles triangle carrier voltage (2-10KHZ) only needing DC reference voltage and amplitude to fix compares and takes out control signal, control the work of its on-off-Tong constantly, utilize the natural performance of handoffs of three-phase commutation bridge can hold the adjustment of its alternating voltage amount of sliding carrying out level with both hands to three interchanges with a turn-off device; There is flux coupled relation between delayed the joined auxiliary winding voltage phasor of voltage phasor of capacitor and its major-minor winding is combine the basic condition of wiring and adjustment, and electric current phasor in major and minor two windings all close to amplitude and phase place equal time can produce the effect significantly improving power factor and rotating speed and smoothly control.
Implementation column 1 of the present invention, comprises double winding indentation and is coupled through three single-phase electricity containers and control end connection three-phase commutation bridge alignment circuit, i.e. first-phase main winding W
a1head end by alternating-current switch K
1connect power end, the end of first-phase main winding is by the first single-phase electricity container C
01connect the head end of the 3rd auxiliary winding, the 3rd auxiliary winding W
c2end connect the head end of second-phase main winding, second-phase main winding W
b1head end by alternating-current switch K
1connect power end, the end of second-phase main winding is by the second single-phase electricity container C
02connect the head end of first-phase auxiliary winding, first-phase auxiliary winding W
a2end connect the head end of third phase main winding, third phase main winding W
c1head end by alternating-current switch K
1connect power end, the end of third phase main winding is by the 3rd single-phase electricity container C
03connect the head end of second-phase auxiliary winding, second-phase auxiliary winding W
b2end connect the head end of first-phase main winding; The first-phase of three-phase commutation bridge alignment circuit comprises the first rectifier diode and second rectifier diode of series connection, and the negative electrode of the first rectifier diode connects insulated gate bipolar transistor T
1collector electrode, the anode of the second rectifier diode connects the emitter of insulated gate bipolar transistor, access the end of first-phase main winding between first rectifier diode and the second rectifier diode, the second-phase of three-phase commutation bridge alignment circuit is identical with first-phase structure with third phase.
The three-phase cage asynchronous motor dragging water pump class is adopted to carry out reducing energy consumption.660V three-phase yconnected stator winding is divided into major and minor totally six windings, and the main winding and auxiliary winding of its three-phase is designed to 380 × 1.08=410V magnitude of voltage, and gets the identical number of turn and conductor cross-section, and the electromotive force phase place of the primary and secondary winding of every phase is identical; 400-460V load voltage value selected by three single-phase electricity containers, and under 380V voltage, condenser current is 30% of the rated value electric current I h on motor nameplate; The D1-D6 rectifying tube of adjuster and T
1(IGBT) rated current is chosen as 3Ih, and load voltage value selects 1600V.
Combination the mode of connection as shown in Figure 1: three-phase main-frequency 660V voltage and be positive phase sequence A, B, C tri-end through K
1a.C. contactor and the A that arrives
1, B
1, C
1three terminals; At A
1end connects W
a1main winding head end and W
b2auxiliary winding end, B
1end connects Wb
1main around head end and W
c2auxiliary winding end, C
1end connects W
c1main winding head end and W
a2auxiliary winding end; At W
a1, W
b1, W
c1the end of three main windings draws A successively
0, B
0, C
0three adjustable sides, and same C successively
01, C
02, C
03same W again after the series connection of three capacitors
c2, W
a2, W
b2the head end of three auxiliary winding is connected; Three-phase commutation bridge is unified into D1-D6 rectifier diode.And connect T1 insulated gate bipolar transistor IGBT in DC terminal in anode connection positive pole mode and form combination wiring.The PWM that IGBT pipe adopts each pulsewidth equal controls, and the frequency of its triangular carrier is 10KHz, and reference voltage is adjustable direct current.
As closed K
1after A.C. contactor, the main winding of three-phase and the voltage phasor of auxiliary winding shift the phase angle close to 30 ° respectively to delayed direction, and single-phase electricity container about shifts 30 ° of phase angles to advanced direction; Regulating T gradually
1during the width of pipe conducting, each winding voltage phasor is respectively to the transfer of advanced direction and close to specified phase voltage value, and the rotating speed of motor is about from 75% rated speed to rising at full speed, and the power factor value of entirety also has obvious energy-saving effect close to 1.0.
Embodiments of the invention 2, comprise double winding triangle and be coupled through three single-phase electricity containers and control end connection three-phase half-controlled rectifier bridge alignment circuit, namely the head end of first-phase main winding and the head end of first-phase auxiliary winding are by alternating-current switch K
1connect power end, the end of first-phase auxiliary winding is by the first single-phase electricity container C
01connect third phase main winding head end, the head end of second-phase main winding is connected power end with the head end of second-phase auxiliary winding by alternating-current switch, and the end of second-phase auxiliary winding is by the second single-phase electricity container C
02connect first-phase main winding head end, the head end of third phase main winding is connected power end with the head end of third phase auxiliary winding by alternating-current switch, and the end of third phase auxiliary winding is by the 3rd single-phase electricity container C
03connect second-phase main winding head end; Each of three-phase half-controlled rectifier bridge alignment circuit includes the rectifier diode of series connection and thyristor mutually and forms loop, connects corresponding control end between rectifier diode and thyristor.
Asynchronous motor for Y-series 380V Driving Fan class redesigns, and its stator winding adopts double-deck complete (whole) pitch arrangement, and main winding and auxiliary winding is occupied respectively one deck and by W
a1comparatively W
ab2, W
b1comparatively W
bc2, W
c1comparatively W
ca2delayed 30 ° of voltage phase angle modes are arranged respectively, and the rated voltage of three single-phase electricity containers is chosen as 460V, and its total capability value is chosen by 40% of motor nameplate performance number (KW).Adopt three triode thyristor T
11, T
13, T
15with three rectifying tube D
4, D
6, D
2be unified into three-phase half-controlled rectifier bridge, and by DC terminal short circuit, adopt phase-shifting trigger mode to carry out it and control.
The combination mode of connection is: A, B, C of three-phase 380V positive phase sequence tri-end through K
1a.C. contactor is to A
1, B
1, C
1three ends; W
a1with W
ab2the head end of major and minor rich group and A
1end is connected, W
b1with W
bc2two head ends and B
1end is connected, W
c1with W
ca2two head ends and C
1end is connected; W
a1, W
b1, W
c1the main winding end of three phase voltages draws A successively
0, B
0, C
0three adjustable sides, and at W
ab2end and C
1end, W
bc2end and A
1end, W
ca2end and B
1three pairs of end points between connect C successively
01, C
02, C
03three single-phase electricity containers; A
0, B
0, C
0three adjustable sides are attached to the half control rectifier bridge that three thyristors and three rectifying tubes are unified into.
Work as K
1after A.C. contactor is closed, W
ab2auxiliary winding and C
01, W
bc2auxiliary winding and C
02, W
ca2auxiliary winding and C
03three are in series with single-phase electricity container and to apply three branch roads of line voltage through-flow respectively respectively, utilize its electromagnetic torque and square relation be directly proportional of voltage that motor can be run under the comparatively slow-speed of revolution; At T
11, T
13, T
15when the control phase of three thyristors moves forward gradually, adjuster increases On current gradually and makes A
0, B
0, C
0the magnitude of voltage of three adjustable sides close to zero, corresponding W
a1, W
b1, W
c1the voltage phasor of three main windings is close to the numerical value of the 220V of phase voltage, and motor speed also rises to rated speed gradually, and to produce compared with conventional motor in same even load and reduce the energy-saving effect that current effective value reaches more than 20%.
The embodiment of the present invention 3, comprise the combined connection of double winding by same model, with power and the mair motor of coaxial rigid connection form with auxiliary-motor and become sliver to be linked into loop two rotor windings, double winding is combined is coupled through three single-phase electricity containers and control end connection single-phase rectification bridge alignment circuit, namely the head end of mair motor first-phase winding connects power end by alternating-current switch, the end of mair motor first-phase winding passes through the head end of auxiliary-motor second-phase winding switching mair motor third phase winding, the head end of mair motor third phase winding connects power end by alternating-current switch, the end of mair motor third phase winding passes through the head end of mair motor first-phase winding switching mair motor second-phase winding, the head end of mair motor second-phase winding connects power end by alternating-current switch, the end of mair motor second-phase winding passes through the head end of auxiliary-motor third phase winding switching mair motor first-phase winding, first single-phase electricity container is parallel to auxiliary-motor first-phase winding, second single-phase electricity container is parallel to auxiliary-motor second-phase winding, 3rd single-phase electricity container is parallel to auxiliary-motor third phase winding, single-phase rectification bridge alignment circuit comprises the identical single-phase rectification bridge alignment circuit of three groups of structures, first single-phase rectification bridge alignment circuit comprises the rectifier diode of two groups of parallel connections, often group comprises the rectifier diode of two series connection, the upper pipe often organizing the rectifier diode of series connection is connected with the anode of turn-off thyristor, lower pipe is connected with the negative electrode of turn-off thyristor, accesses the head end of mair motor first-phase main winding between the rectifier diode of first group two series connection, the end of auxiliary-motor third phase winding is accessed between the rectifier diode of second group two series connection, access the head end of mair motor second-phase winding between the rectifier diode of first group two series connection of the second single-phase rectification bridge alignment circuit, between the rectifier diode of second group two series connection, access the end of mair motor first-phase main winding, access the head end of mair motor third phase winding between the rectifier diode of first group two series connection of the 3rd single-phase rectification bridge alignment circuit, between the rectifier diode of second group two series connection, access the end of mair motor second-phase winding.
For the asynchronous motor of two wound rotor YR types of two output shaft gear-linkeds of dragging horizontal-type biaxial rneader, under the condition not changing motor stator 380V winding construction, only need from terminal box, delta connection be untied and six of its three windings terminals be drawn.415V load voltage value selected by its three power capacitors, and its capacity of three is equal with the name plate rating value of single motor.Because turning to of two motors arranged in parallel is contrary, therefore the phase sequence of the rotor voltage at wound rotor collector ring place also carries out Commutating connect mutually on the contrary accordingly.The position of the model of two motors, power and stator winding arrangement is all identical, and it is carried out to the adjustment of 10%-100% rated speed with three single phase regulator of same structure.
The combination mode of connection is: A, B, C of three-phase 380V power supply tri-end through K
1alternating-current switch is to A
1, B
1, C
1three ends, by same model and with power two motors one of them be set as mair motor, another is auxiliary-motor, and according to A
1-W
ab1-B
0-W
bc2-C
1-W
ca1-A
0-W
ab2-B
1-W
bc1-C
0-W
ca2-A
1loop order six windings are connected, and at A
1-C
0, B
1-A
0, C
1-B
0c is connected successively between three docking line ends
01, C
02, C
03three Monophase electric power capacitors; Three single phase regulator adopt D respectively
1-D
4, D
5-D
8, D
9-D
12four rectifying tubes form single-phase rectifier, and connect T successively in other DC terminal of its point
11, T
12, T
13the thyristor GTO that a gate pole turns off, at A
1-A
0, B
1-B
0, C
1-C
0three docking line ends draw six lines and is connected to single phase regulator respectively.
At K
1alternating-current switch is closed but when not connecting capacitor, voltage on each winding is only 190V, and under in the voltage phasor of two windings of homophase, complications shift the condition of 60 ° respectively, the rotating speed of composition motor only maintains under 10% rated speed, and after three single-phase electricity containers drop into, its winding voltage and rotating speed slightly raise; When the conducting width of three adjusters that PWM controls increases, three will from 330V gradually to zero change to the magnitude of voltage regulated between end points, and the voltage phasor of each winding will shift 60 ° of phase angles respectively and to the change of 380V magnitude of voltage, its rotating speed also moves closer to rated value.This mode of speed regulation be the voltage magnitude of stator winding is regulated with phase place simultaneously, induced potential in two rotor windings loops of connecting and current controlled under the internal factor of two stator winding composite magnetic powers, the unloaded angular speed of the ideal of two motors is changed, thus produces speed governing and energy-conservation effect all preferably with simple control device.This mode of speed regulation has use value equally to the Double-stator motor lengthening cage-type rotor.
Claims (1)
1. the non-frequency electric capacity governing of asynchronous machine and winding connect a circuit, it is characterized in that: comprise non-frequency electric capacity governing circuit and winding connecting loop, non-frequency electric capacity governing circuit comprises three single-phase electricity containers and alignment circuit, and alignment circuit adopts three-phase commutation bridge alignment circuit or three single-phase rectification bridge alignment circuits, and connects at rectifier bridge direct current two ends and can turn off electronic device and carry out PWM control, described winding connecting loop comprises three-phase main winding and three-phase auxiliary winding, three-phase main winding and three-phase auxiliary winding adopt double winding indentation or the combined connection of double winding, three-phase main winding head end is by alternating-current switch for connecting power end, and the end of three-phase auxiliary winding is respectively used to draw the control end connecting alignment circuit, wherein, three single-phase electricity containers are series at the head end of double winding zigzag three-phase auxiliary winding respectively or are parallel to the combined three-phase auxiliary winding of double winding, described double winding indentation is coupled through three single-phase electricity containers and control end connects three-phase commutation bridge alignment circuit, namely the head end of first-phase main winding connects power end by alternating-current switch, the end of first-phase main winding connects the head end of the 3rd auxiliary winding by the first single-phase electricity container, the end of the 3rd auxiliary winding connects the head end of second-phase main winding, the head end of second-phase main winding connects power end by alternating-current switch, the end of second-phase main winding connects the head end of first-phase auxiliary winding by the second single-phase electricity container, the end of first-phase auxiliary winding connects the head end of third phase main winding, the head end of third phase main winding connects power end by alternating-current switch, the end of third phase main winding connects the head end of second-phase auxiliary winding by the 3rd single-phase electricity container, the end of second-phase auxiliary winding connects the head end of first-phase main winding, the first-phase of three-phase commutation bridge alignment circuit comprises the first rectifier diode and second rectifier diode of series connection, the negative electrode of the first rectifier diode connects the collector electrode of insulated gate bipolar transistor, the anode of the second rectifier diode connects the emitter of insulated gate bipolar transistor, access the end of first-phase main winding between first rectifier diode and the second rectifier diode, the second-phase of three-phase commutation bridge alignment circuit is identical with first-phase structure with third phase, the combined connection of described double winding is by same model, with power and the mair motor that is connected of two rotor windings and auxiliary-motor form, double winding is combined is coupled through three single-phase electricity containers and control end connects single-phase rectification bridge alignment circuit respectively, namely the head end of mair motor first-phase winding connects power end by alternating-current switch, the end of mair motor first-phase winding passes through the head end of auxiliary-motor second-phase winding switching mair motor third phase winding, the head end of mair motor third phase winding connects power end by alternating-current switch, the end of mair motor third phase winding passes through the head end of auxiliary-motor first-phase winding switching mair motor second-phase winding, the head end of mair motor second-phase winding connects power end by alternating-current switch, the end of mair motor second-phase winding passes through the head end of auxiliary-motor third phase winding switching mair motor first-phase winding, first single-phase electricity container is parallel to auxiliary-motor first-phase winding, second single-phase electricity container is parallel to auxiliary-motor second-phase winding, 3rd single-phase electricity container is parallel to auxiliary-motor third phase winding, single-phase rectification bridge alignment circuit comprises the identical single-phase rectification bridge alignment circuit of three groups of structures, first single-phase rectification bridge alignment circuit comprises the rectifier diode of two groups of parallel connections, often group comprises the rectifier diode of two series connection, the upper pipe often organizing the rectifier diode of series connection is connected with the anode of turn-off thyristor, lower pipe is connected with the negative electrode of turn-off thyristor, accesses the head end of mair motor first-phase winding between the rectifier diode of first group two series connection, the end of mair motor third phase winding is accessed between the rectifier diode of second group two series connection, access the head end of mair motor second-phase winding between the rectifier diode of first group two series connection of the second single-phase rectification bridge alignment circuit, between the rectifier diode of second group two series connection, access the end of mair motor first-phase winding, access the head end of mair motor third phase winding between the rectifier diode of first group two series connection of the 3rd single-phase rectification bridge alignment circuit, between the rectifier diode of second group two series connection, access the end of mair motor second-phase winding.
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| CN103944334B (en) * | 2014-04-29 | 2017-02-15 | 国家电网公司 | Variable voltage speed control asynchronous motor |
| CN103944333A (en) * | 2014-04-29 | 2014-07-23 | 国家电网公司 | Pulse speed adjusting type wound rotor asynchronous motor |
| DE102016216041A1 (en) * | 2016-08-25 | 2018-03-01 | Robert Bosch Gmbh | Method and control device for heating a device driven by a brushless DC motor |
| CN106533073B (en) * | 2016-12-23 | 2023-07-14 | 山东新沙单轨运输装备有限公司 | Design method and use method for changing three-phase alternating current motor into generator |
| WO2019021373A1 (en) * | 2017-07-25 | 2019-01-31 | 三菱電機株式会社 | Drive device, compressor, air conditioner, and drive method |
| CN113726260B (en) * | 2021-09-30 | 2024-01-30 | 深圳市源信电气技术有限公司 | Automatic internal compensation control device for asynchronous motor capacitor |
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Effective date of registration: 20170526 Address after: 526000 Zhaoqing Duanzhou industrial town, Duanzhou, Guangdong, Taining Patentee after: Zhaoqing Chicco Motor Co., Ltd. Address before: 035500 Shanxi City, Xinzhou Province, the county economic and Trade Bureau of the street ahead of the five Patentee before: Liu Jianping |