CN201001078Y

CN201001078Y - Brushless DC motor

Info

Publication number: CN201001078Y
Application number: CNU2006200456509U
Authority: CN
Inventors: 关文涛
Original assignee: 郑春开
Current assignee: Kedu Electric Co Ltd
Priority date: 2006-09-06
Filing date: 2006-09-06
Publication date: 2008-01-02
Anticipated expiration: 2016-09-06

Abstract

The utility model relates to a brushless direct current motor, which comprises a stator part and a rotor part, wherein the neck groove number is 15. The technical proposal is adopted which can make the motor capacity attain above 1100W, the starting resistance is all square with 9 groove, the wire embedding is easy, the end part of the coil is very short, the starting of the motor is easy to operate steadily, the torque is fluctuated little, the lowest revolution speed can be adjusted to 60 swung dash 70 revolution/minute, the highest motor efficiency reaches up to 90 swung dash 95 percent, the common motor only reach up to 80 swung dash 85 percent.

Description

Brushless DC motor

Technical field

The utility model relates to a kind of brushless DC motor, especially wherein the improvement of stator component wire casing number.

Background technology

Brushless direct-current (permanent magnetism) motor is the permanent magnet direct current motor that adopts electronic commutation, owing to there is not commutator structure, motor has series of advantages such as volume is little, in light weight, efficient height, there is not commutation spark especially, be applicable to and require high reliability, application scenarios such as fail safe, because brshless DC motor both had been different from the common brush permanent magnet DC motor that has, and also was different from permagnetic synchronous motor, had simple in structure, easily manufactured, the electric efficiency height, good mechanical property, cheap, save brush material, again can be hermetically sealed etc. advantage.The wire casing number (being the armature slot number) of the stator component of the brushless DC motor of domestic production at present has two kinds of 9 grooves and 18 grooves.18 slot motors are because number of poles and groove number have corresponding relation, and when magnetic pole and integer groove align, suction increases, and resistance of start square is big, and the starting current that need are big has increased the capacity of controller, under loading condition, even can't start.9 grooves and number of poles do not have corresponding relation, and resistance of start square is little, start easily, but also there is shortcoming in 9 grooves, be exactly the groove number very little, as increasing capacity motor, will increase armature diameter, the also corresponding increase of flute profile could embed more line, but rule is very difficult, therefore need to increase end winding length (end winding does not produce moment), cause the waste copper cash, and copper loss is lost also increase, the efficient reduction.Existing market is seen has only the 500W brushless DC motor.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of novel brushless DC motor, is the defective that the brushless DC motor of 9 grooves and 18 grooves exists to overcome said stator parts wire casing number.

For solving the problems of the technologies described above, brushless DC motor provided by the utility model comprises stator component and rotor part, and the wire casing number of described stator component is 15 grooves.

The further technical scheme of the utility model is: stator component comprises stator punching, band Hull cell stator punching, Hall element, coil, slot liner, slot wedge, stator punching and band Hull cell stator punching are folded and are fastened by certain orientation and quantity, and stator punching and band Hull cell stator punching are welded at stator welding groove place, stator component is pressed in the support, embed the wire casing of coil according to certain rules to stator component, with slot liner bag jail coil, and knock in wire casing with slot wedge and fix coil, Hall element is packed in the Hull cell, connects motor and draws lead; Rotor part comprises shaft block ring, magnet steel catch, rotor magnetic steel, rotor punching, flat key, axle, rotor punching is folded and is fastened by certain direction and quantity, and rotor punching is welded at rotor welding groove place, flat key is put into the keyway of axle, and the rotor punching of getting well with welding is set on the axle, embed rotor magnetic steel in rotor punching, the magnet steel back-up ring is inserted on both sides respectively, and snaps in shaft block ring at the draw-in groove place of axle.

Adopt technique scheme, capacity motor is accomplished more than the 1100W, the resistance of start is equally matched with 9 grooves, the rule ratio is easier to, and end winding is shorter, and motor start-up operates steadily easily, torque ripple is little, minimum speed can be transferred to 60～70 rev/mins, and electric efficiency is up to 90～95%, and general motor only reaches 80～85%.

Description of drawings

Fig. 1 is the overall structure stereogram of a kind of embodiment of the utility model.

Fig. 2 is the overall structure dismounting figure of a kind of embodiment of the utility model.

Fig. 3 is a stator component stereogram among Fig. 1.

Fig. 4 is stator component dismounting figure among Fig. 1.

Fig. 5 is Fig. 1 rotor parts stereograms.

Fig. 6 is Fig. 1 rotor parts dismounting figure.

Embodiment

As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Figure 6, the present embodiment brushless DC motor comprises deep groove ball bearing 4, support 5, stator component 6, rotor part 7, wavy spring packing ring 8, the front end housing 9 of screw 1, spring washer 2, rear end cap 3, band dust cap.Wherein stator component 6 comprises stator punching 10, band Hull cell stator punching 11, Hall element 12, coil 13, slot liner 14, slot wedge 15, the wire casing number of stator component 6 is 15 grooves, stator punching 10 and band Hull cell stator punching 11 are folded and are fastened by certain orientation and quantity, stator punching 10 and band Hull cell stator punching 11 are welded with argon arc welding at 4 stator welding groove c places then, stator component 6 is pressed in the support 5, embed coil 13 to wire casing a then according to certain rules, with the firm coil 13 of slot liner 14 bags, and knock in wire casing a with slot wedge 15 and fix coil 13, then Hall element 12 is packed among the Hull cell b, connect motor and draw lead.Wherein rotor part 7 comprises shaft block ring 16, magnet steel catch 17, rotor magnetic steel 18, rotor punching 19, flat key 20, axle 21, rotor punching 19 is folded and is fastened by certain direction and quantity, rotor punching 19 is welded with argon arc welding at 4 rotor welding groove d places then, then flat key 20 is put into the keyway e of axle 21, and be set on the axle 21 with the good rotor punching 19 of welding, embed 4 rotor magnetic steels 18 in rotor punching 19, be inserted in magnet steel back-up ring 17 then respectively on both sides, and snap in shaft block ring 16 at the draw-in groove g place of axle, mill rotor punching 19 and axle 21 then.The deep groove ball bearing 4 of band dust cap is set on the axle 21 of rotor part 7, put into the vacancy of stator component 6 centres, covering rear end cap 3 usefulness screws 1 and spring washer 2 tightens fixing, then put wavy spring packing ring 8 to axle 21 these ends of installing with keyway f, cover front end housing 9 usefulness screws 1 and spring washer 2 and tighten fixing.

The operation principle of this brushless DC motor: 3 coils 13 connect by wye connection, draw U, V, W three ends, 3 Hall elements 12 are according to the position at rotor part 7 places and the N utmost point or the S utmost point of respective rotor magnet steel 18, always there are 2 Hall elements, the 12 corresponding N utmost points any time, 1 Hall element 12 corresponding S utmost point, Hall element 12 switch connections of the corresponding N utmost point, Hall element 12 switches of the corresponding S utmost point disconnect, such 3 Hall elements, 12 control U, V, the wherein two ends of W three ends are connected, coil 13 produces magnetic force, act on rotor part 7 and produce moment, rotor part 7 overcomes the effect of load and resistance, presses certain orientation and rotates.The rotation of

rotor part

7,3 Hall elements, 12 corresponding magnetic poles are changed, thereby the variation that the wherein two ends of control U, V, W three ends are connected, coil 13 produces magnetic force, act on rotor part 7 and produce moment, rotor part 7 overcomes the effect of load and resistance and rotates, alternate so repeatedly, the axle 21 on the rotor part 7 just externally output torques drive loads and rotate.

Claims

1, a kind of brushless DC motor comprises stator component (6) and rotor part (7), and the wire casing number that it is characterized in that stator component (6) is 15 grooves.

2, brushless DC motor according to claim 1, it is characterized in that stator component (6) comprises stator punching (10), band Hull cell stator punching (11), Hall element (12), coil (13), slot liner (14), slot wedge (15), stator punching (10) and band Hull cell stator punching (11) are folded and are fastened by certain orientation and quantity, and stator welding groove (c) locate with stator punching (10) and the band Hull cell stator punching (11) weld, stator component (6) is pressed in the support (5), embed the wire casing (a) of coil (13) according to certain rules to stator component (6), wrap firm coil (13) with slot liner (14), and knock in wire casing (a) with slot wedge (15) and fix coil (13), Hall element (12) is packed in the Hull cell (b), connects motor and draws lead; Rotor part (7) comprises shaft block ring (16), magnet steel catch (17), rotor magnetic steel (18), rotor punching (19), flat key (20), axle (21), rotor punching (19) is folded and is fastened by certain orientation and quantity, and locate rotor punching (19) is welded at rotor welding groove (d), flat key (20) is put into the keyway (e) of axle 21, and be set on the axle (21) with the good rotor punching (19) of welding, embed rotor magnetic steel (18) in rotor punching (19), magnet steel back-up ring (17) is inserted on both sides respectively, and locates to snap in shaft block ring (16) at the draw-in groove (g) of axle.