CN2475219Y

CN2475219Y - Starter for dc brushless motor

Info

Publication number: CN2475219Y
Application number: CN 01223103
Authority: CN
Inventors: 洪银树; 洪庆升; 尹佐国
Original assignee: Sunonwealth Electric Machine Industry Co Ltd
Current assignee: Sunonwealth Electric Machine Industry Co Ltd
Priority date: 2001-04-30
Filing date: 2001-04-30
Publication date: 2002-01-30
Anticipated expiration: 2011-04-30

Abstract

The utility model discloses a starting device for a dc brushless motor, which comprises a stator and a rotor. The stator consists of a shaft pipe crossing connecting coil seat, an upper pole tablet and a lower pole tablet and can also be composed of a plurality of magnetic pole tablets being overlaid, and the rotor is connected to the shaft pipe of the stator via a rotating shaft pivot. At least one upward protuberant magnetic tablet or downward protuberant magnetic tablet is arranged on a magnetic pole surface of the stator, and a permanent magnet of the rotor has equal distance with each magnetic pole surface. The structure can make the rotor of the motor have much stronger torsion, thus making the motor be easy to start and rotate.

Description

The starting drive of DC Brushless Motor

The utility model relates to a kind of DC Brushless Motor parts, refers in particular to a kind of starting drive of brush DC formula motor.

Shown in Figure 1 is the three-dimensional exploded view of the structure of the DC Brushless Motor used always, and central siphon 91 cross-under coil holders 90, superior pole piece 92, inferior pole piece 93, this central siphon 91 are supported rotation axis 95 rotations of rotors 94.The DC Brushless Motor that this kind is commonly used is easy to starting for making rotor 94, on the magnetic pole strength of superior pole piece 92 and inferior pole piece 93, be formed with the not unfilled corner on same circumference 96, like this when this magnetic pole strength is responded to mutually with the permanent magnet 97 of rotor 94, can produce uneven magnetic force, thereby make rotor 94 be easy to starting, solve the dead angle phenomenon of rotor 94 rotations.

Consult shown in Figure 2, because the superior pole piece 92 of this DC Brushless Motor commonly used and the magnetic pole strength of inferior pole piece 93 are formed with unfilled corner 96, this unfilled corner 96 and magnetic pole strength be not on same circumference, therefore, can form a bigger spacing between this unfilled corner 96 and the permanent magnet 97, like this, can make the induction between this superior pole piece 92 and inferior pole piece 93 and the permanent magnet 97 not good, thereby reduce the rotary torsion of motor.

The purpose of this utility model is to overcome above-mentioned defective provides a kind of DC Brushless Motor with deficiency starting drive, and it can make rotor have bigger torsion, makes motor be easy to the starting rotation.

For achieving the above object, the utility model adopts following technical proposals: it comprises: stator, it is made up of central siphon cross-under coil holder, superior pole piece and inferior pole piece, magnetic pole strength is respectively arranged on this superior pole piece and the inferior pole piece, and described magnetic pole strength is positioned on the circumference of same radius that center with this superior pole piece and inferior pole piece is the center of circle; Rotor, its by rotation axis hinge joint on the central siphon of said stator; On the magnetic pole strength of above-mentioned superior pole piece and inferior pole piece, has a magnetic sheet of projection up or down at least, the interlaced setting of described magnetic sheet isogonism; The spacing that the permanent magnet of described rotor and each magnetic pole strength of described superior pole piece and inferior pole piece become to equate.

Another kind of scheme is that it comprises: stator; Rotor, its by rotation axis hinge joint in the centre bore of stator; Described stator forms by several pole pieces are stacked, be wound with coil on the pole of this pole piece, each pole terminal of this pole piece has magnetic pole strength, described magnetic pole strength is positioned on the circumference of same radius that center with this pole piece is the center of circle, have a magnetic sheet of projection up or down on the described magnetic pole strength at least, described magnetic sheet isogonism distributes and is provided with.

After adopting technique scheme, the permanent magnet of its rotor and magnetic pole strength equidistantly encircle and are provided with in week, therefore, produce best inductive effects between the permanent magnet of magnetic pole strength and rotor, thereby motor have bigger torsion; In addition, the magnetic sheet on the magnetic pole strength can produce uneven magnetic force, and this makes rotor be easy to starting.

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the three-dimensional exploded view of the structure of the DC Brushless Motor used always;

Fig. 2 is the textural association cross-sectional view of the DC Brushless Motor used always;

Fig. 3 is the three-dimensional exploded view of first embodiment of DC Brushless Motor starting drive of the present utility model;

Fig. 4 is the combination cross-sectional view of DC Brushless Motor starting drive of the present utility model;

Fig. 5 is the three-dimensional exploded view of second embodiment of DC Brushless Motor starting drive of the present utility model.

Figure 3 shows that first embodiment of the present utility model, mainly constitute by stator 1, rotor 2.

This stator 1 comprises superior pole piece 11, inferior pole piece 12, central siphon 13 and coil holder 14, and this superior pole piece 11 and inferior pole piece 12 are fixed on this coil holder 14 by central siphon 13 cross-under.Superior pole piece 11 and inferior pole piece 12 are by forming more than a slice at least, the magnetic pole strength 111,121 of superior pole piece 11 and inferior pole piece 12 is on the circumference of same radius that center with this superior pole piece 11, inferior pole piece 12 is the center of circle, on the limit of this magnetic pole strength 111,121, be provided with one at least and extend the magnetic sheet 112,122 that protrudes, the interlaced setting of these magnetic sheet 112,122 isogonisms up or down.

Rotor 2 is articulated in rotation on the central siphon 13 of stator 1 by a rotation axis 21, this rotor 2 has an annular permanent magnnet 22, and this permanent magnet 22 can interact with superior pole piece 11, inferior pole piece 12 and the magnetic sheet 112,122 of stator 1.

See also Fig. 4, when superior pole piece 11 and inferior pole piece 12 are fixed on the coil holder 14 by central siphon 13 cross-under, the magnetic pole strength 111,121 of this superior pole piece 11, inferior pole piece 12 is on the circumference of same radius that center with this superior pole piece 11, inferior pole piece 12 is the center of circle, therefore, equidistantly ring week is provided with the permanent magnet 22 of rotor 2 with this magnetic pole strength 111,121; Again because magnetic pole strength 111,121 respectively has magnetic sheet 112,122, therefore, the superior pole piece 11 of this stator 1 and inferior pole piece 12 are constantly being changed polarity chron, magnetic pole strength 111,121 just can and the permanent magnet 22 of rotor 2 between the power of generation homopolar-repulsion, thereby impel rotor 2 constantly to rotate; Because magnetic pole strength 111,121 has the magnetic sheet 112,122 of protrusion, this magnetic sheet 112,122 can produce uneven magnetic force, and this makes rotor 2 dead angle can not occur rotating, thereby rotor 2 is easy to starting.

Figure 5 shows that the utility model uses the embodiment of the DC Brushless Motor of radial windings mode, stator 3 is piled up by several pole pieces 31 and forms, be wound with coil 32 on its pole, each pole terminal of pole piece 31 has magnetic pole strength 33, this magnetic pole strength 33 is on the circumference of same radius that center with this pole piece 31 is the center of circle, have a magnetic sheet 34 that extends up or down on each magnetic pole strength 33 at least, 34 one-tenth isogonisms of this magnetic sheet distribute and are provided with.

After the rotation axis 21 of rotor 2 was articulated in the centre bore 35 of stator 3, equidistantly ring week was provided with the permanent magnet 22 of rotor 2 with each magnetic pole strength 33; Therefore, the DC Brushless Motor of present embodiment has best inductive effects, thereby has bigger torsion.Owing on the pole piece 31 magnetic sheet 34 is arranged, therefore, the pole piece 31 of stator 3 is constantly being changed polarity chron again, the magnetic pole of this magnetic pole strength 33 just can and the permanent magnet 22 of rotor 2 between the power of generation homopolar-repulsion, thereby impel rotor 2 constantly to rotate; Because the magnetic 34 of protrusion is arranged on the magnetic pole strength 33, and therefore, this magnetic sheet 34 can produce uneven magnetic force, thereby make rotor 2 be easy to starting.

The above only is a best specific embodiment of the present utility model, actual being not limited thereto, and all have identical or the variation person of the principle of equal effects, is all the protection range of this patent.

Claims

1, a kind of starting drive of DC Brushless Motor, comprise: stator, it is made up of central siphon cross-under coil holder, superior pole piece and inferior pole piece, respectively has magnetic pole strength, described magnetic pole strength to be positioned on the circumference of same radius that center with this superior pole piece and inferior pole piece is the center of circle on this superior pole piece and the inferior pole piece; Rotor, its by rotation axis hinge joint on the central siphon of said stator; It is characterized in that: on the magnetic pole strength of above-mentioned superior pole piece and inferior pole piece, have a magnetic sheet of projection up or down at least, the interlaced setting of described magnetic sheet isogonism; The spacing that the permanent magnet of described rotor and each magnetic pole strength of described superior pole piece and inferior pole piece become to equate.

2, a kind of starting drive of DC Brushless Motor comprises: stator; Rotor, its by rotation axis hinge joint in the centre bore of stator; It is characterized in that: described stator forms by several pole pieces are stacked, be wound with coil on the pole of this pole piece, each pole terminal of this pole piece has magnetic pole strength, described magnetic pole strength is positioned on the circumference of same radius that center with this pole piece is the center of circle, have a magnetic sheet of projection up or down on the described magnetic pole strength at least, described magnetic sheet isogonism distributes and is provided with.