CN2204468Y

CN2204468Y - Permanent rotary magnetic-field D.C motor

Info

Publication number: CN2204468Y
Application number: CN 94224520
Authority: CN
Inventors: 孟怀纲
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-29
Filing date: 1994-07-29
Publication date: 1995-08-02
Anticipated expiration: 2004-07-29

Abstract

The utility model relates to a permanent rotary magnetic field direct current motor which is composed of a casing, an end cover, a brush holding frame, a magnetic potential sensor, a rotor and a stator. The utility model adopts new design schemes that a coil is arranged in a stator groove; a commutator is removed; a magnetic pole, the magnetic potential sensor and the brush holding frame are arranged on the rotor; thus, the motor has good reaction characteristics and control characteristics of a direct current motor with a brush, and has the characteristics of good manufacturability, high rate of finished products, low noise and long service life of a direct current motor without a brush. The utility model is a replacing product for the future, and has good economical and social benefit.

Description

Permanent rotary magnetic-field D.C motor

The utility model permanent magnetism rotating magnetic field DC motor belongs to permanent magnet direct current motor, is widely used on automobile and other plant equipment.

At present domestic produce the brush DC motor arranged, though good response characteristic and control characteristic are arranged, but its enamelled wire is in rotor, be subjected to the restriction of groove area and root diameter, the coiling difficulty, its brush is subjected to the diameter of commutator (commutator) and the restriction of width of commutator segment in addition, the motor of larger capacity, then be difficult to solve brush and fill the regulation of current density perhaps, and commutator temperature rise, be difficult for improving capacity motor, existing in addition direct current machine is owing to commutator and brush friction is big, loss is big, noise is big, difficult raising of life-span.Though and the brshless DC motor of now studying has the one side of good manufacturability, but owing to used modern electronic circuit and electronic devices and components, not only improved cost, also increased the difficulty of design greatly, there are many problems, up to the present also do not succeed in developing brushless DC motor both at home and abroad, just discuss from theory.

The purpose of this utility model is the novel permanent magnetic rotating magnetic field DC motor of characteristics such as research is made and a kind ofly not only to have been had sound response characteristic that the brush DC motor is arranged and control characteristic but also to have had the good manufacturability of brushless DC motor, and the absence of commutator life-span is long.

The purpose of this utility model be achieved in that on casing and end cap and the end cap bearing as stator and rotor the palm part, stator in the form-wound coil embedding silicon steel film trap is housed in casing, the rotor of making magnetic pole with permanent magnetic material is equipped with in the stator the inside, on the axle on the rotor left side magnetic potential transducer is housed, brush holder yoke is equipped with in the outer of magnetic potential transducer, brush is housed in the brush carrier, it cooperates with the magnetic potential transducer makes the motor relay element, order about electric motor starting or stop, the armature spindle two ends are fixed on the bearing of end cap.After motor is connected DC power supply, the partial stator coil produces an electromagnetic field, the former permanent-magnetic field of this magnetic field and rotor produces a thrust mutually, promote rotor rotation, the magnetic potential transducer makes another grade of stator coil electricity produce a new magnetic field again also along with rotation, continue to promote rotor rotation, make stator coil reach the effect of cutting magnetic line, that is to say the conversion of borrowing the magnetic potential transducer to reach the electric motor loop electric current, make constant direct current of motor output.

The utility model is owing to adopted above-mentioned design, this motor had not only been had have the sound response characteristic of brush DC motor and control characteristic but also have the feature of brushless DC motor good manufacturability, because coil is located on the stator absence of commutator again, so under the situation of same size, can accomplish that capacity is big, magnetic close little, iron loss is little, efficient is high, friction is little, the little life-span of noise is long, is the new product that updates.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is a vertical section of the present utility model schematic diagram

Fig. 2 is the utility model structural representation

Fig. 3 is the utility model stator silicon steel sheet shaping schematic diagram

Fig. 4 is the utility model brush holder yoke schematic diagram

Among the figure 1, oiliness bearing 2, end cap 3, brush holder yoke

4, brush carrier and brush 5, brush carrier plate 6, axle

7, magnetic potential transducer 8, rotor 9, magnetic pole

10, iron cover 11, axle bumper 12, casing

13, stator 14, stator piece 15, coil

Among Fig. 2, oiliness bearing 1, end cap 2, casing 12 can design or external coordination according to the size of existing similar motor, so that and now use with electric drilling match.Stator 13 is made up of stator piece 14 and coil 15, be fixed on the casing the inside, stator 13 general employing silicon steel sheets strike out the circular ring plate that has 6 uniform slotted eyes by design size and laminate into cylinder, coil 15 general 3 groups of wire frames of enamelled wire coiled according to design size power selection different model, embed then in the stator film trap, every group of coil one end is connected the other end and is connected with power cathode with brush, a brush is adorned in the loop, other 3 brushes are connected with positive source, 6 brushes all contact with magnetic potential transducer outer surface, cooperate the magnetic potential transducer to make the motor relay element.Rotor 8 is made up of axle 6, axle shelves 11, magnetic pole 9, iron cover 10, magnetic pole 9 with make annular or 2 semicircles with permanent magnetic material (generally adopting ferrite) and utilize iron cover 10 to be fixed on the axle 6 to become cylinder, be contained in the stator the inside, because rotor surface is smooth, balance is fabulous, energy consumption is very little during rotor rotation, noise is also minimum, and the simple rate of finished products of technology is extremely many.Magnetic potential transducer 7 usefulness conductors and insulator two parts are made on the axle that the smooth small circle ring of surfacing is installed in rotor left side, its effect mainly is the conversion that reaches the electric motor loop electric current by the magnetic potential sensing, brush holder yoke 3 usefulness insulation boards (using bakelite usually) are made the one side that circular ring plate is fixed on 6 brush carriers insulation board at regular intervals, spring and brush all are housed in each brush carrier, then brush holder yoke being installed in magnetic potential transducer outer is fixed on the casing, brush and magnetic potential transducer are touched, play the effect of magnetic potential change over switch, thereby reach the conversion of electric motor loop electric current.Axle 6 two ends are fixed on the end cap bearing at two ends.

Claims

1, a kind of permanent magnetism rotating magnetic field DC motor of forming by end cap (2), brush holder yoke (3), magnetic potential transducer (7), rotor (8), casing (12), stator (13), it is characterized in that: the stator (13) that the form-wound coil setting-in becomes is housed in casing, the rotor made from permanent magnetic material (8) is housed in the stator coil, magnetic potential transducer (7) is housed on the rotor left end shaft, brush holder yoke (3) is equipped with in magnetic potential transducer outer.

2, permanent magnetism rotating magnetic field DC motor according to claim 1, it is characterized in that: described stator strikes out by design size with silicon steel sheet and has 6 annulus of all adoring slotted eye and laminate into cylinder, be embedded with 3 groups of coils of shaping coiling in 6 slotted eyes, every group of coil one end connects a brush, the other end connects power cathode.

3, permanent magnetism rotating magnetic field DC motor according to claim 1 is characterized in that: described rotor is made annular or 2 semicircles with permanent magnetic material, utilizes the iron cover to be fixed on and becomes cylinder on the axle.

4, permanent magnetism rotating magnetic field DC motor according to claim 1 is characterized in that: described magnetic potential transducer utilizes conductor and insulator two parts to make surfacing, smooth small circle ring is installed on the axle on the rotor left side.

5, permanent magnetism rotating magnetic field DC motor according to claim 1, it is characterized in that: described brush holder yoke is made the one side that circular ring plate is fixed on 6 brush carriers insulation board at regular intervals with insulation board, spring and brush are housed in each brush carrier, brush holder yoke is installed in the outer of magnetic potential transducer, and brush is gently contacted with the magnetic potential sensor surface.