CN201315507Y

CN201315507Y - Minitype DC motor

Info

Publication number: CN201315507Y
Application number: CNU2008200883692U
Authority: CN
Inventors: 陈惠龙; 田兴元
Original assignee: ZHEJIANG JINDA MOTOR ELECTRICAL APPLIANCE CO Ltd
Current assignee: ZHEJIANG JINDA MOTOR ELECTRICAL APPLIANCE CO Ltd
Priority date: 2008-06-13
Filing date: 2008-06-13
Publication date: 2009-09-23
Anticipated expiration: 2018-06-13

Abstract

The utility model provides a minitype DC motor, wherein the permanent magnetic steel [13] is provided with two pairs of magnetic poles in cross spread; the rotor core chip [12] is provided with six equant chip gears; the winding is wound in the way of a double parallel branch; the double parallel branch means that when the rotor rotates at any angle, the number of the winding which is connected with a circuit by an electric brush is two; the two windings are connected in parallel; and the two windings in each pair of parallel winding are wound on two chip gears with an angle of 180 agrees. When the motor is electrified, a pair of stator magnetic pole with an included angle of 90 degrees and a pair of rotor magnetic pole with the included angle of 120 degrees (or 60 degrees) are in interaction with each other. Compared the prior motor with the utility model, under the same load of 20 (g. cm), the load speeds (r/min) of the prior rotor and the utility model are respective 5060 and 6100, and the caulking torques (g. cm) are respective 75 and 148.

Description

DC micromotor

Technical field

The utility model relates to DC micromotor, belong to technical field of motors in the electricity.

Background technology

DC micromotor is the appliance for personal care that is widely used in based on shaver, business automation equipment, the miniature motor in domestic electric appliance, toy and other a plurality of fields.It is little that DC micromotor is required to possess motor volume under slow-speed of revolution condition, the performance that motor torsion is big.Because DC micromotor is under the situation that operating voltage is determined and magnetic steel of stator magnetic flux is determined, its rotating speed is inversely proportional to the magnetic pole logarithm, and moment of torsion is directly proportional with electric current.And existing DC micromotor all adopts the two poles of the earth magnet steel and three-flute rotor chip, single parallel branch length apart from winding mode.So the DC micromotor of this structure is difficult to realize the slow-speed of revolution, high pulling torque.

Summary of the invention

At above-mentioned defective, the utility model will provide a kind of many magnetic poles logarithm, big operating current, to reach the DC micromotor of low rotation speed large torque.

The DC micromotor that the utility model provides, by rotor, the Stator and electrical machine shell constitutes, its rotor has axle, chip and winding, commutator constitutes, stator is a permanent magnetic steel, motor casing is in order to install stator and rotor, brush carrier also is installed, brush and terminals are arranged on the brush carrier, rotor winding commutator segment on commutator is connected with the brush sliding contact and connects power supply through terminals, wherein said permanent magnetic steel has two pairs of magnetic poles to be cross arrangement, said rotor chip has 6 chip teeth of five equilibrium, said winding is pressed the coiling of two-in-parallel branch road, said two-in-parallel branch road is meant in rotor rotation to any angle, be connected the winding that winding in the circuit has two pairs of parallel connections through brush, two windings in the winding of every pair of parallel connection angle respectively are on two chip teeth of 180 °, as by counting 1 according to rotor chip circumference order, 2,3,4,5, No. 6 windings, then No. 1 winding is in parallel with No. 4 windings, No. 2 winding is in parallel with No. 5 windings, No. 3 winding is in parallel with No. 6 windings, each moment place in circuit be two couple in said three pairs of windings in parallel.

As everyone knows, DC micromotor was in when work in the past, each moment institute's conducting be adjacent two windings, make and produce a pair of magnetic pole that is 120 ° of angles on the rotor chip, they and magnetic steel of stator two are between a pair of magnetic pole of 180 ° of angles and produce deflection, thereby motor is rotated.Fold the winding that 60 ° of five equilibriums are arranged and the utility model adopts that two pairs of magnetic steel of stator that are the cross arrangement magnetic pole and three pairs are connected in parallel by each, and by each moment institute's conducting is two pairs of windings that intersect, make when electrical power, two pairs of rotor magnetic pole interactions that are the magnetic pole of the stator of 90 ° of angles and are 120 ° of (or 60 °) angles are arranged respectively.Identical as the winding number of turns, almost be equivalent to two motors of the prior art disregarding the magnet steel area relative with rotor.Because each moment has the conducting in parallel of four windings simultaneously, under the voltage prerequisite identical with the winding number of turns electric current big than prior art just of process, therefore the utility model can provide bigger moment of torsion than prior art and since the increase of magnetic pole logarithm then the comparable prior art of the utility model higher rotating speed is provided.Concrete parameter to two kinds of structures of certain type DC micromotor relatively sees the following form:

	The prior art motor	The utility model motor
	The prior art motor	The utility model motor	Voltage (V)	1.2	1.2
No-load current (A)	0.25	0.38	Voltage (V)	1.2	1.2
No-load current (A)	0.25	0.38	No-load speed (r/min)	7000	7000
Load (g.cm)	20.0	20.0	No-load speed (r/min)	7000	7000
Load (g.cm)	20.0	20.0	Load current (A)	1.46	1.65
Load speed (r/min)	5060	6100	Load current (A)	1.46	1.65
Load speed (r/min)	5060	6100	Stall torsion (g.cm)	75	148
Locked rotor current (A)	4.8	9.78	Stall torsion (g.cm)	75	148

The DC micromotor that the utility model provides, said commutator has six commutator segments, being connected to of six windings and six commutator segments wherein: No. 1 winding and No. 4 windings are connected in parallel between No. 1 commutator segment and No. 2 commutator segments, No. 2 windings and No. 5 windings are connected in parallel between No. 5 commutator segments and No. 6 commutator segments, No. 3 windings and No. 6 windings are connected in parallel between No. 3 commutator segments and No. 4 commutator segments, No. 1 commutator segment is connected with No. 4 commutator segments, No. 2 commutator segment is connected with No. 5 commutator segments, No. 3 commutator segment is connected with No. 6 commutator segments, and wherein commutator segment and winding numbering sorts successively by the same direction of rotation of rotor; Said brush is a pair of, and installs by 90 ° of angles.

The utility model makes to have formed two pairs of parallel-current branch roads under the situation of a pair of brush, and works in two pairs of pole fields respectively by specific method for winding.When voltage is identical with resistance, will have more the branch road of a pair of generation electromagnetic force in two branch road motors than former single branch road motor.So the torsion of motor also will obviously increase.Simultaneously above-mentioned winding winding is the short distance winding, has reduced longly apart from the more copper loss that winding produced, and has improved electric efficiency.

The utility model is by specific method for winding, and said stator permanent magnet adopts the neodymium iron boron magnetite, to increase the magnetic flux of stator.

The utility model is by specific method for winding, and the structure of said terminals is that a hole is arranged on brush carrier, the hook that has conductor piece to curve in the hole, and hook points in the hole, and conductor piece is connected with brush.Be that terminals of the present utility model have adopted plug-in type mechanical attachment mode, the elasticity of utilizing hook is with the lead chucking that inserts and connect, and what both made lead and terminals connects, retracts convenient, fast, can not cause damage to motor again.The terminals of prior art are the wiring piles of evagination, be welded on the wiring pile with the external wire end during use, though connect firm but total installation length of the motor that extended, with when welding welding compound might flow into motor internal and cause loose contact or cause corrosion, weld time is long in addition or welding temperature is too high, all can cause damage to the plastic end cover of motor.And said structure of the present utility model has just been avoided these defectives.

The utility model is by specific method for winding, and said terminals also have exposed wiring pile, to satisfy the needs of custom with welded connection mode user.

Description of drawings

Radially sectional drawing when Fig. 1 does not have winding for the utility model is among the figure: 11-shell, 12-chip, 13-permanent magnetism, 14-winding slot, 15-armature spindle, 16-commutator segment line hook;

Fig. 2 is the winding diagram of the utility model winding and commutator segment, among the figure: 1,2,3,4,5, the 6-winding, 1 ', 2 ', 3 ', 4 ', 5 ', 6 '-commutator segment;

Fig. 3 is the utility model winding, a kind of winding schematic diagram.Among the figure: 1 ', 2 ', 3 ', 4 ', 5 ', 6 '-commutator segment, 1 ＂, 2 ＂, 3 ＂, 4 ＂, 5 ＂, 6 ＂-rotor chip tooth;

Fig. 4 is the brush carrier part-structure figure of the utility model one embodiment, among the figure: 21-shell, 22-terminals jack, 23-brush, 24-armature spindle, 25-commutator segment, 26-brush carrier;

Fig. 5 is the terminal portion cutaway view of another embodiment of the utility model, among the figure: 31-brush carrier, 32-wiring pile, 33-jack, 34-hook portion, 35-brush.

Embodiment

1, a DC micromotor is arranged, the structure of its stator and rotor has shell 11 as shown in Figure 1, be pressed into the stator permanent magnet 13 of annular in the shell, be processed as two pairs of magnetic pole crosses when annotating magnetic on the permanent magnetism and arrange, promptly every 90 ° be the centre bit of a S utmost point or the N utmost point, the S utmost point and the N utmost point are arranged alternately.Rotor reaches axle head the commutator formation is installed by being pressed into coiling winding (not shown) on rotor chip 12 and the chip tooth on the armature spindle 15.Wherein the rotor chip has 6 winding slots 14, gets final product 6 windings of coiling, and 6 commutator segments are also arranged on the commutator, and the line end of each winding all is connected on the commutator segment line hook 16.Its winding connection mode as shown in Figure 2, No. 1 winding 1 and No. 4 windings 4 be connected in parallel on No. 1 commutator segment 1 ' and No. 2 commutator segments 2 ' between, No. 2 windings 2 and No. 5 windings 5 be connected in parallel on No. 5 commutator segments 5 ' and No. 6 commutator segments 6 ' between, No. 3 windings 3 and No. 6 windings 6 be connected in parallel on No. 3 commutator segments 3 ' and No. 4 commutator segments 4 ' between, No. 1 commutator segment is connected with No. 4 commutator segments, No. 2 commutator segment is connected with No. 5 commutator segments, No. 3 commutator segment is connected with No. 6 commutator segments, and wherein commutator segment and winding numbering sorts successively by the same direction of rotation of rotor.Its rotor one end is installed on the end wall of shell consubstantiality, and the other end is installed on the end cap of dress in addition, at institute's brush shell in addition in the end cap of dress in addition.Two brushes that are 90 ° of angles are installed on the brush shell, make whenever it all be adjacent a commutator segment continuous two on the commutator segment place in circuit, it is in parallel and divide at two and intersect on 60 ° the straight line of crossing the axle center to constitute four windings.Its positive pole differed from 10 ° with the magnetic center of the S utmost point is biased when brush was installed.

2, a DC micromotor is arranged, the rotor chip has 6 chip teeth, can be around 6 windings, commutator segment has 6, its concrete winding as shown in Figure 3, method is: 1. the end of a thread is wrapped in earlier on No. 6 commutator 6 ' copper sheets hook.

2. hang over after line is walked around the groove below No. 4 chip tooth 4 ＂, No. 5 chip tooth 5 ＂ and between No. 3 chip tooth 3 ＂, No. 4 chip tooth 4 ＂ on No. 3 commutator segment 3 ' hooks.

3. on No. 2 chip 2 ＂ around the line of the regulation number of turns.Around intact back hanging wire on No. 2 commutator segment 2 ' hooks.

4. reach the standard grade from No. 2 commutator segment 2 ' hooks and need walk around between No. 6 chip 6 ＂, No. 1 chip tooth 1 ＂ of tooth and No. 5 chip tooth 5 ＂ and No. 6 chip tooth 6 ＂ behind the groove hanging wire on No. 5 commutator segment 5 ' hooks.

5. on No. 4 chip tooth 4 ＂ around the line of the regulation number of turns, around intact back hanging wire on No. 4 commutator segment 4 ' hooks.

6. reach the standard grade from No. 4 commutator segment 4 ' hooks and need walk around between No. 2 chip tooth 2 ＂, No. 3 chip tooth 3 ＂ and No. 1 chip tooth 1 ＂, No. 2 chip tooth 2 ＂ behind the groove hanging wire on No. 1 commutator segment 1 ' hook.

7. on No. 6 chip tooth 6 ＂ around the line of the regulation number of turns, around intact back hanging wire on No. 6 commutator segment 6 ' hooks.

8. then on No. 5 chip 5 ＂ around the line of the regulation number of turns, on No. 5 commutator segment 5 ' hooks, and cut off the line tail around intact back hanging wire.

9. next since No. 4 commutator segment 4 ' hanging wires line around the regulation number of turns on No. 3 chip tooth 3 ＂, the hanging wire tail and is cut several line tails on No. 3 commutator segment 3 ' hooks then.

10. next since No. 2 commutator segment 2 ' hanging wires line around the regulation number of turns on No. 1 chip tooth 1 ＂, the hanging wire tail and is cut several line tails on No. 1 commutator segment 1 ' hook then, and coiling leaves it at that.

Wherein the installation of commutator segment, brush as shown in Figure 4, stator permanent magnet and rotor are installed on the shell 21, are installed in end cap at armature spindle 24 and go forward, and pass brush carrier 26 earlier, 6 commutator segments 25 are arranged on the rotor commutator, the brush 23 that is 90 ° of angles is installed on the brush carrier.Also has patch jack 22 on the brush carrier.

3, DC micromotor, terminals jack on its brush carrier 31, as shown in Figure 5: the jack 33 that points to end cap is arranged on the brush carrier, the hook 34 that curves with copper sheet is installed in the jack, the hook of hook points to inboard, hook has open elastic force, and when terminals inserted jack, hook can fasten terminals.This copper sheet that bends hook has also connected wiring pile 32 from the other end, and passes with hole on the brush carrier, and wiring pile connects brush 35 braces again.

Claims

1, a kind of DC micromotor, by rotor, the Stator and electrical machine shell constitutes, its rotor has axle, chip and winding, commutator constitutes, stator is a permanent magnetic steel, motor casing is in order to install stator and rotor, brush carrier also is installed, brush and terminals are arranged on the brush carrier, rotor winding commutator segment on commutator is connected with the brush sliding contact and connects power supply through terminals, it is characterized in that said permanent magnetic steel has two pairs of magnetic poles to be cross arrangement, said rotor chip has 6 chip teeth of five equilibrium, said winding is pressed the coiling of two-in-parallel branch road, said two-in-parallel branch road is meant in rotor rotation to any angle, be connected the winding that winding in the circuit has two pairs of parallel connections through brush, two windings in the winding of every pair of parallel connection angle respectively are on two chip teeth of 180 °, as by counting 1 according to rotor chip circumference order, 2,3,4,5, No. 6 windings, then No. 1 winding is in parallel with No. 4 windings, No. 2 winding is in parallel with No. 5 windings, No. 3 winding is in parallel with No. 6 windings, each moment place in circuit be two couple in said three pairs of windings in parallel.

2, DC micromotor as claimed in claim 1, it is characterized in that said commutator has six commutator segments, being connected to of six windings and six commutator segments wherein: No. 1 winding and No. 4 windings are connected in parallel between No. 1 commutator segment and No. 2 commutator segments, No. 2 windings and No. 5 windings are connected in parallel between No. 5 commutator segments and No. 6 commutator segments, No. 3 windings and No. 6 windings are connected in parallel between No. 3 commutator segments and No. 4 commutator segments, No. 1 commutator segment is connected with No. 4 commutator segments, No. 2 commutator segment is connected with No. 5 commutator segments, No. 3 commutator segment is connected with No. 6 commutator segments, and wherein commutator segment and winding numbering sorts successively by the same direction of rotation of rotor; Said brush is a pair of, and installs by 90 ° of angles.

3, DC micromotor as claimed in claim 1 is characterized in that said stator permanent magnet adopts the neodymium iron boron magnetite, to increase the magnetic flux of stator.

4, DC micromotor as claimed in claim 1, the structure that it is characterized in that said terminals are that a hole is arranged on brush carrier, the hook that has conductor piece to curve in the hole, and hook points in the hole, and conductor piece is connected with brush.