CN2268335Y - Ac mutual inductive motor - Google Patents

Abstract

The utility model relates to an alternating current mutual inductive motor. The alternating current mutual inductive motor comprises a squirrel-cage rotor, a conducting strip, and core insulation. A stator is composed of two semi-stators which are abreast arranged, and each semi-stator is composed of an iron core with a slot, and a winding. The current directions of adjacent wire slot windings are opposite. The magnetic pole center of one stator is corresponding with the wire slot of the other stator, each semi-stator is a phase winding, and the current phase difference of two phase windings is 90 DEG. The utility model has the characteristics of high efficiency, small volume, big driving moment, the rotation speed of high speed rotating being not very high, no electric brush, long life, low noise, low cost, and convenient maintenance, and the utility model is applicable to a minitype motor with small power or a motor with minor diameter.

Description

The AC mutual induction motor

The utility model relates to the alternating current motor technical field.

Asynchronous motor stator inner surface magnetic pole area in the past little (three phase electric machine is 1/3-1/2, and monophase machine is 1/4-1/3), field circuit is long, and the stator winding end line is long, efficient is lower.Particularly small-sized and micromachine, along with reducing of root diameter, rotor bar descends with π speed doubly with respect to the asynchronous movement speed of magnetic pole of the stator, the induced electromotive force of rotor and current power are also corresponding to be reduced at double, torque is then square to take advantage of the speed of π to fall sharply, so electric efficiency generally descends with the minimizing straight line of its power.Simultaneously, the following motor of 20W mostly has been the brush direct current machine, its complex structure, and the required precision height, the noise height, the life-span is short, the cost height, maintenance is complicated.

The purpose of this utility model provides a kind of AC mutual induction electricity col machine, and it is simple in structure, volume is little, efficient is high, starting performance is good, brushless, makes simply, and is easy to maintenance, is specially adapted to the less motor of micromachine or diameter.

The utility model is achieved in that a kind of AC mutual induction motor, comprise cage rotor, the sliver of rotor and core insulation, it is characterized in that stator is made of side by side two semidefinite, each semidefinite constitutes by the iron core and the winding of trough of belt, the winding current direction of per two adjacent wire casings is opposite, the surface of the close rotor of semidefinite all is a magnetic pole strength, N, S utmost point interlaced arrangement, each pole center of one of them semidefinite all with the wire casing correspondence of another semidefinite, each semidefinite adopts a phase winding, 90 ° of the current and phase differences of two phase windings.

Above-mentioned stator core in motor is made with material non-conductive but magnetic conduction, and iron core preferably is made of silicon steel sheet.

The winding of said stator can the several monocycle forms of coiled, also can big monocycle of coiled, and crooked the intersection forms a chain of shape when rolling off the production line, or coiled dicyclo, Fourth Ring, six rings ..., each dicyclo is crooked to intersect, and is a chain of shape.

The stator core of above-mentioned motor can be the integral type of trough of belt, also can be composite type, as be the modular construction of n "  " shape independence iron core, n=2,3,4 ..., or stator core is cylindrical shape, the inner face or the fixed outside of garden tube has (bonding or screw) n to magnetic core, n=2,3,4 ..., so that make, install and maintenance.

The rotor of above-mentioned motor can be inside, and the outside is the stator the inside trough of belt of stator core (this moment), also can be rotor outside, the inside is stator (stator core outside trough of belt this moment).

The advantage of this machine is:

(1) energy saving is strong: the distance that the present asynchronous motor of field circuit can shorten 2/3-1/2, can realize asynchronous motor 3-2 magnetic fluxes doubly on the flat stator iron core; Rotor obtains stator power with oncontacting brush form (transformation form), so rotor current power is big, and the utilance of stator field is higher; The stator winding end line is short, and with the same excitation magnetic action of iron core inside conductor; Therefore these facility have that volume is little, power is big, torque is big, the characteristics of efficient high (iron loss, line loss are few, magnetic pole utilance height).

(2) function admirable: when starting or high load capacity low speed rotation, rotor current power is big, and turning moment is big, and the characteristics of series machine or direct current machine are arranged.The mechanical property of bounded between asynchronous machine and direct current machine when no-load running, its rotating speed is higher than asynchronous machine, is lower than direct current machine, and the motor that causes that runs up in the time of can reducing the zero load of direct current or series machine damages and energy consumption.

(3) applied range: this machine is applicable to three-phase four-wire power, and promptly winding connects phase voltage (zero line with A mutually), another winding connection voltage (B mutually with C mutually).Cooperate electric capacity or phase shifting transformer; Also be applicable to the individual event power supply, promptly a winding directly is connected to power supply, is connected to power supply after another winding and the capacitances in series or connects the phase shift variable-voltage power supply.The power supply wiring of changing arbitrary winding can change direction of rotation.

Can make the following alternating current machine of 20W, and keep greater efficiency, be used to replace present direct current machine and exchange brush motor.

Can reduce rectifying installation as the control motor, life-saving reduces failure rate.Not only can be as middle-size and small-size and miniature power motor, and common electric rotating machine, also be specially adapted to make the less motor for submerged pump of diameter and require the less servomotor of rotating mass etc.

(4) manufacturing process is simple: whole stator and shell can be made two semidefinite, form and have only an intermediary interface.Not only manufacturing process can be reduced, also the accuracy of manufacture can be improved.

When making miniature or atomic type motor, each magnetic pole or a pair of magnetic pole can be made into activity or fourth shape or "  " shape independence iron core, roll over dress easily as the permanent magnet of common DC motor, and realize external rolling off the production line.Both improved line mass and efficient down, convenient for maintaining also has the effect that improves the iron core raw material availability again.

Simultaneously this motor also has simple in structure, brushless, the life-span is long, noise is low, cost is low, easy to maintenance, starting torque is big, during in light weight, energy-conservation, high speed rotating rotating speed can be not high excessively etc. characteristics.Especially suitable low-power machine or the less motor of diameter done.As: electric drill motor, hair dryer direct current machine, hair-dryer, electric fan etc.

Be described further below in conjunction with embodiment and accompanying drawing, but not as to qualification of the present utility model.

Fig. 1 is the perspective view of the utility model embodiment 1.

Fig. 2 is the structural representation of embodiment 2.

Fig. 3 is the structural representation of embodiment 3.

Fig. 4 is the structural representation of embodiment 4.

Among Fig. 1,1,4 difference, two stators side by side, the current opposite in direction of wire casing 2 windings on the silicon steel sheet core of trough of belt, 3 is cage rotor, wherein sliver and core insulation.

Among Fig. 2, the outside stator is 3 modular constructions to "  " shape independence iron core 5.

Among Fig. 3, the outside stator is that the inner surface of garden tube 6 is bonded with the structure that 3 pairs of magnetic cores 7 are formed.

Among Fig. 4, the fixed outside of internal stator iron core garden tube 6 has the cage rotor of 3 pairs of magnetic cores 8,9 for band sliver 10.

Claims (8)

1, a kind of AC mutual induction motor, comprise cage rotor, sliver wherein and core insulation, it is characterized in that stator is made of side by side two semidefinite, each semidefinite constitutes by the iron core and the winding of trough of belt, lead the winding current direction of wire casing opposite mutually for per two, the surface of the close rotor of semidefinite all is a magnetic pole strength, N, S utmost point interlaced arrangement, each pole center of one of them semidefinite all with the wire casing correspondence of another semidefinite, each semidefinite adopts a phase winding, 90 ° of the current and phase differences of two phase windings.

2, motor according to claim 1 is characterized in that said stator core is made of silicon steel sheet.

3, motor according to claim 1 is characterized in that the several monocycles of winding coiled of semidefinite.

4, motor according to claim 1 is characterized in that big monocycle of winding coiled of semidefinite, the crooked intersection, forms a chain of shape.

5, motor according to claim 1, the iron core that it is characterized in that stator are the modular construction of n "  " shape independence iron core, n=2,3,4 ...

6, motor according to claim 1, the iron core that it is characterized in that stator is a cylindrical shape, its inner face or fixed outside have several to magnetic core, n=2,3,4 ...

7, according to claim 1,2,3,4,5 or 6 described motor, it is characterized in that cage rotor inside, two molecular stators of semidefinite outside.

8, according to claim 1,2,3,4,5 or 6 described motor, it is characterized in that cage rotor outside, two molecular stators of semidefinite inside.

Images