CN2159629Y

CN2159629Y - Conjugate DC motor

Info

Publication number: CN2159629Y
Application number: CN 93218256
Authority: CN
Inventors: 霍佃玖
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-10
Filing date: 1993-07-10
Publication date: 1994-03-23
Anticipated expiration: 2003-07-10

Abstract

The utility model relates to a conjugation DC motor. The utility model is characterized in that the magnetic pole of a stator is sheathed with two independent conjugation windings (and shaded-pole windings are sheathed) whose number of turns is same, the winding direction is same and the wiring direction is contrary, and the rotor of the utility model is provided with a squirrel cage winding; when two rectangular wave pulsating electric currents (conjugation DC electric current) whose phase difference is 1/2 period, the duty ratio is 1, the frequency is same and the direction is same, the magnetic poles of the rotor establish an alternating magnetic field which combines with the lag magnetic field of the shaded-pole into a rotary magnetic field, and the alternating magnetic field combines with and the rotary magnetic field is coupled with the squirrel cage rotor winding to form torque to drive the rotor to rotate. The utility model has no electric brush or commutator and has the advantages of reliable running and simple structure; the utility model is suitable for motors which have small volumetric capacity, and the utility model can change the wiring connection to make the utility model can be used for AC and DC power supply.

Description

Conjugate DC motor

The utility model relates to a kind of conjugation DC motor, especially a kind of brushless conjugation DC motor by the power supply of direct current conjugater transformation device.

Known DC Brushless Motor, a kind of is that stator adopts polyphase windings, the conducting in certain sequence of each phase winding, another kind is that stator only has a single-phase winding, but institute's galvanization direction must change with rotor-position, and its rotor then is a permanent magnetism.The also necessary position sensor of this motor, follow the tracks of rotor-position and convert thereof into the signal of telecommunication, this is a comparatively complicated link, and torque fluctuations is big, and its control circuit is more complicated (referring to " small and special electric machine " Shanghai electrical micro-machine research institute, Science and Technology of Shanghai version P31～P55).

The purpose of this utility model provide a kind of need not be complicated control circuit and rotor-position tracking transducer and signal processing circuit thereof, can produce continuous torque, brushless conjugation DC motor no torque ripple, that directly drive with the conjugation DC power supply.

The purpose of this utility model is achieved in that

On the stator salient poles that builds up with punching, two concentrated windings of suit are the conjugation winding, and pole surface is opened a sulculus, as split-pole, and covering device utmost point winding (short-circuited coil) thereon, its rotor then is that oblique slot type mouse cage winding is housed on iron core.

When above-mentioned conjugation pitch of the laps flows through the conjugation direct current respectively, because of being the rectangle pulsating current each other, duty ratio is 1, its phase difference was 1/2 cycle, because the conjugation winding connection is opposite, so the magnetic field that conjugate current is set up is alternating magnetic field, this magnetic field is that the hysteresis magnetic field of distributed rectangular and split-pole synthesizes rotating magnetic field, this resultant magnetic field and rotor mouse cage winding magnetic field constitute drawing torque, drive the rotor rotation.

Owing to adopt above-mentioned conjugation DC motor scheme, only need to change the magnetic pole winding into two independently conjugation windings, can cancel the brush and the consumable accessorys such as commutator, armature of original DC motor, eliminated weak link; Direct current conjugation power conversion is a static equipment partly, and is so the utility model is simple in structure, reliable; And, can realize the infinitely variable speeds of motor by changing the frequency of conjugation DC power supply; Can make the running of motor speed stabilizing, noiselessness, noiseless by frequency stabilization circuit; Change the conjugation winding connection, also can be used as the alternating current motor running.

Concrete structure of the present utility model and electric hookup are provided by following examples and accompanying drawing:

Fig. 1 is the utility model the 1st embodiment one shaded-pole conjugation dc motor structure figure.

Fig. 2 is a direct current conjugation electric power conversion apparatus key wiring diagram.

Fig. 3 is the utility model the 2nd embodiment one frame-type the two poles of the earth conjugation direct current shaded pole motor structural map.

Fig. 4 is the 3rd embodiment one a reluctance type conjugation DC motor structural map.

Further specify below in conjunction with embodiment and accompanying drawing:

Among the figure: 1, stator iron core 2, main pole 3, split-pole 4, split-pole winding 5,6, conjugation winding 7, rotor 8, rotor mouse cage winding.

Be illustrated in figure 1 as the structural map of 4 utmost point salient pole type conjugation direct current shaded pole motors (also can be made into hidden pole type).Its stator is that the punching with salient pole shape builds up stator iron core ［ 1 ］, goes up two concentrated windings of suit at salient pole type main pole ［ 2 ］ and becomes split-pole ［ 3 ］, and suit split-pole winding (short-circuited winding) ［ 4 ］ thereon is as auxiliary winding.Mouse cage winding ［ 8 ］ is housed on its rotor core ［ 7 ］.Fig. 3 is the 2nd embodiment one frame-type the two poles of the earth conjugation direct current shaded pole motor structural map.Upward install two independently conjugation windings ［ 26,29 ］ at assembled framework laminate patch iron core ［ 24 ］, its rotor is the mouse cage winding.Fig. 4 does not establish split-pole on the 3rd embodiment one salient pole, the conjugation direct current reluctance motor that utilizes magnetic conductance is different in the big small air gap principle to make.

In the foregoing description and the accompanying drawing, the wiring principle of conjugation winding is that the magnetic field neighbour that each winding is set up is extremely different, and the flow direction that each utmost point two independent winding is set up is opposite.Two windings must equal turn numbers, and around to opposite or around to identical but wiring is opposite, also available bifilar insulated conductor is also opposite around, wiring.This is the requirement that constitutes the conjugation winding.

The conjugation DC power supply is the working power of the utility model one conjugation DC motor indispensability, and it is through the conversion of conjugation dc converter by DC power supply ［ 19 ］.The utility model adopts known inversion to promote the driver element ［ 13 ］ of thick film circuit as conjugation dc converter shown in Figure 2, include vibration, frequency stabilization, shaping, promote circuit, its output switch control signal is through ［ 14,17 ］ deliver to the control grid of power component ［ 18a～18d ］ respectively, under its control, terminal ［ 21,23 ］ rectangle pulsating current output (diagram is output as negative) is arranged respectively, its characteristics as shown in the figure, both frequencies are identical, duty ratio is identical, direction is identical, this two-way electric current is actually by the direct current decomposition and forms, this conjugation direct current rectangle pulsating current is during by above-mentioned conjugation winding, promptly on magnetic pole, set up alternating magnetic field, in air gap, form distributed rectangular magnetic field, and set up rotating magnetic field jointly with auxiliary winding hysteresis magnetic field, promote the cage rotor rotation.

With aforementioned conjugation winding and connect, then the magnetic field set up of two conjugation windings is equidirectional, promptly becomes alternating current motor.

Its wiring is that example is described as follows with Fig. 1 and Fig. 2:

Terminal ［ 10 ］ links to each other with ［ 21 ］, and ［ 9 ］ link to each other with ［ 23 ］, links to each other with ［ 22 ］ behind ［ 11 ］ and ［ 12 ］ short circuit, and close a switch ［ 20 ］ promptly have the direct current conjugate current by the conjugation winding.

If terminal ［ 9 ］ linked to each other with ［ 11 ］ and draw, terminal ［ 10 ］ is linked to each other with ［ 12 ］ and draw, this lead-out wire is received on the suitable AC power, then this motor is promptly pressed alternating current motor and is turned round.

Direct current conjugater transformation device can special use also can be shared.

Claims

1, a kind of conjugation DC motor, by salient pole type magnetic pole [2], split-pole [3], stator magnetic pole winding, split-pole winding [4] and rotor winding [8] constitute, it is characterized in that, the magnetic pole winding of described conjugation DC motor by two independently conjugation winding [5,6] constitute.

2, conjugation DC motor according to claim 1, it is characterized in that described two conjugation windings are equal turn numbers, around on the contrary, or around constituting to the independent winding identical, that wiring is opposite ［ 5,6 ］, or bifilar insulated conductor 1 coil of coiled in parallel but the winding of lead-in wire reversal connection constitute.

3, conjugation DC motor according to claim 1 is characterized in that being provided with split-pole ［ 3 ］ and split-pole winding ［ 4 ］ at the surperficial 1/3-1/2 of magnetic pole ［ 2 ］ place.

4, conjugation DC motor according to claim 1 is characterized in that, the rotor of this motor is equipped with skewed slot mouse cage winding ［ 8 ］.

5, conjugation DC motor according to claim 1 is characterized in that, the conjugation winding ［ 27,28 ］ of mutually insulated is housed on frame-type iron core ［ 24 ］.

6, conjugation DC motor according to claim 1 is characterized in that, pole surface is a step, and the part that wherein part that air gap is little is a main pole air gap ［ 32 ］, air gap is big is consequent pole air gap ［ 33 ］.

7, conjugation DC motor according to claim 1, it is characterized in that, the conjugation DC power supply of this motor is that waveform is identical, direction is identical, duty ratio is identical, frequency is identical, differing is the two-way dc pulse electric current in 1/2 cycle, and this electric current forms two-way ［ 21 ］ and ［ 23 ］ output by DC power supply ［ 19 ］ under switch controlling signal ［ 14, the 17 ］ effect of power component ［ 18a～18d ］ in control circuit (13).