CN2447984Y - Structure-improved brushless DC machine - Google Patents

Abstract

The utility model relates to a structure-improved brushless DC machine, which is mainly composed of a stator, a rotor, and a driving element. An axle tube is sheathed with the stator; a bearing which is used for hinging a rotation shaft of the rotor is positioned in the inner part of the axle tube, and a polarity of the rotor is monitored by the driving element which is used for driving the rotor to rotate; the driving element is fixed on a stator seat or the lower part of a ring magnet. The utility model mainly keeps functions of original brushless DC motors, elements of the circuit board are eliminated, so the brushless DC motor has minimum thickness and volume. The utility model keeps the functions of the original brushless DC motors, the elements of the circuit board are eliminated, so the manufacture and assembly are made convenient.

Description

Improve the brshless DC motor of structure

The utility model relates to a kind of brshless DC motor that improves structure, exactly, relates to a kind of structure with brshless DC motor and is improved, and makes this brshless DC motor can form the motor of less thickness.

See also Fig. 1, shown in Figure 2, it is to be a kind of radiator fan of power by traditional brshless DC motor, this kind traditional heat-dissipating fan, be widely used in the heat radiation of heat-generating electronic elements and central processing unit, and in order to make this kind traditional heat-dissipating fan in narrow space, also can use, therefore, the sector personnel towards how the volume of radiator fan being made the most compact direction research and development, can have usage space widely in the hope of making this radiator fan.

As this Fig. 1, shown in Figure 2, this traditional brshless DC motor radiator fan 9, be to establish a central siphon 92 by housing 91, central siphon 92 outsides are passed through and are connected to a stator seat 93 and a circuit board 96, be wound with coil on the stator seat 93 and be provided with superior pole piece 94, inferior pole piece 95, can be hinged in the central siphon 92 for the axle 98 of rotor 97, thus formed brshless DC motor radiator fan 9 has certain thickness.Therefore, for making the dealer of brshless DC motor radiator fan, wanting to reduce the thickness of brshless DC motor fan under existing necessary member, is technical a great problem really.

In the middle of the radiator fan 9 of existing brshless DC motor, at least be provided with on this circuit board 96 and comprise a hall sensing element and an one drive circuit, this drive circuit is made of transistor more than at least two and necessary electronic element, this hall sensing element is the polarity that is used for monitoring the annular magnet of rotor, and drive rotor rotation by drive circuit, therefore, the element of this circuit board 96 is obligato in the structure of traditional brshless DC motor fan.But,, then, will be very helpful to the Bao Xiaohua of product if the space that circuit board is shared is reduced under the function that does not influence product.

Main purpose of the present utility model provides a kind of brshless DC motor that improves structure, and it mainly is at the element of possessing subduction circuit board under the function of former brshless DC motor, makes this brshless DC motor that minimum thickness and volume be arranged.

Another purpose of the present utility model provides a kind of brshless DC motor that improves structure, and it mainly is at the element of possessing subduction circuit board under the function of former brshless DC motor, makes the manufacturing of this brshless DC motor and assembles more convenient.

The utility model is achieved in that it comprises: stator is combined with pole piece and coil with central siphon; Rotor, by rotating shaft in conjunction with stator and establish annular magnet and be centered around around the stator; Driving element has drive circuit and sensing element, and is fixed on the lower position of annular magnet.

Stator includes a stator seat in addition, and stator seat is provided with for driving element is heavy and puts fixing deep gouge hole.

Include a housing in addition, this housing is provided with can be for the axle bed of stator combination, and housing is provided with for driving element is heavy and puts fixing counterbore.

Stator can be to have the even number polar arm and is wound with coil.

Include a pedestal in addition, pedestal is provided with the axle bed that is nested with combination for stator, and pedestal also supplies the driving element secure bond.

Driving element is provided with four pins at least, and wherein two pins connect stator coils, and another pin draws and connects power supply, again a pin ground connection.

One of them pin that it draws two pins that connect stator coil, a monitoring line is pulled out.

The utility model is made of stator, rotor and driving element, and wear stator by a central siphon, it is hinged for the rotating shaft of rotor that central siphon inside is installed with bearing, and by the polarity of driving element monitoring rotor annular magnet and drive the rotor rotation, driving element is to be fixed on the stator seat or the position of annular magnet below.

Further specify structure, feature and the effect that the utility model is lifted below in conjunction with drawings and Examples:

Fig. 1 is the member exploded perspective view of conventional apparatus structure.

Fig. 2 is the component composition profile of conventional apparatus structure.

Fig. 3 is the member exploded perspective view of the utility model first preferred embodiment.

Fig. 4 is the combination bottom view of the utility model first preferred embodiment.

Fig. 5 is the 5-5 line profile of Fig. 4.

Fig. 6 is the member exploded perspective view of the utility model second preferred embodiment.

Fig. 7 is the combination section of the utility model second preferred embodiment.

Fig. 8 is the member exploded perspective view of the utility model the 3rd preferred embodiment.

Fig. 9 is an electronic component drive circuit schematic diagram of the present utility model.

See also the utility model shown in Figure 3 one preferred embodiment, it is made of members such as stator 1, rotor 2, driving elements 3.Stator 1 is itself to be wound with coil 12 by stator seat 11, reaches with a central siphon 14 in conjunction with this stator seat 11 and upper and lower pole piece 13.Rotor 2 is to be hinged on position rotating in the central siphon 14 of stator 1 by a rotating shaft 21, and this rotor 2 itself has an annular magnet 22, and this annular magnet 22 has the N.S magnetic pole, and ring be located at stator seat 11 around, make this rotor 2 can form relative stator 1 induction rotation.Driving element 3 is to be formed by sensing element and drive circuit encapsulation, it can do the transmission of signal by pin 31, and is connected with the coil 12 of stator 1, in preferred embodiment, these driving element 3 outer surfaces can indicate special token 32, and the best induction point of driving element 3 is revealed.This driving element 3 can be fixed on the appropriate location by pin 31, in the middle of this preferred embodiment, this driving element 3 is fixed on the stator seat 11 of stator 1, moreover, this stator seat 11 can be provided with deep gouge hole 15, make this driving element 3 all or the part sink in this deep gouge hole 15, so, the brshless DC motor after this combination has minimum thickness.

See also the combination situations of Fig. 4, the utility model first preferred embodiment shown in Figure 5, this rotor 2 is to be hinged in the central siphon 14 of stator 1 by rotating shaft 21, and driving element 3 is the stator seats 11 that are fixed and are combined in stator 1, because this stator seat 11 is to be made by insulating material, therefore, this driving element 3 can be done the transmission of correct signal, and this driving element 3 itself does not increase the thickness and the volume of whole motor yet.

See also the utility model shown in Figure 6 second preferred embodiment, it is to establish central siphon 14 assemblings of an axle bed 42 for stator 1 by housing 4, and by the rotating shaft 51 hinged rotations of this central siphon 14 for rotor 5, rotor 5 itself has annular magnet 52, flabellum 53; 3 of driving elements can be fixed on the housing of being made by insulating material 4, so, can form one and have the heat emission fan of brshless DC motor, moreover, this housing 4 more can be provided with counterbore 41, makes driving element 3 heavy putting at this counterbore 41, so, the entire heat dissipation fan is combined when finishing, and this heat emission fan has minimum constructive height (as shown in Figure 7).

See also the utility model shown in Figure 8 the 3rd preferred embodiment, it is made of stator 6, rotor 7, pedestal 8 and driving element 3.Stator 6 is to be stacked to radial even number polar arm 61 by silicon steel sheet to do radially that winding around 62 forms, and stator 6 is nested with the axle bed 81 at pedestal 8, and it is hinged for the rotating shaft 71 of rotor 7 by the bearing 82 of axle bed 81, rotor 7 has annular magnet 72 to have the N.Z magnetic pole and is looped around around the stator 6, makes rotor 7 can form relative stator 6 induction rotations.3 of driving elements can directly be located on the pedestal 8, and this driving element 3 preferable positions are between the polar arm 61 of stator 6 peripheries, by the pole change of driving element 3 monitoring rotors 7, and the rotation that drives rotor 7.

See also control circuit figure of the present utility model shown in Figure 9, driving element 3 of the present utility model as known in the figure is provided with four pins at least, wherein two pins connect stator coil, one of two other pin is a ground connection, another then connects power supply for drawing, these two one of them pin that connects the pin of stator coils can draw and pick out a monitoring line 33, this monitoring line 33 can be done the amplification of signal by at least one transistor 34, control to be provided as the monitoring rotating speed of motor, or the caution of monitoring electrical fault.

The utility model is that drive circuit is become a driving element with the hall sensing combination of elements according to 1 structure that is disclosed of claim the, and so, whole brshless DC motor can form less thickness, and the manufacturing assembling of brshless DC motor is more prone to.

The utility model is according to 2 structures that disclosed of claim the, and this driving element is can sink to put deep gouge hole at stator seat, and so, whole brshless DC motor can form littler thickness.

The utility model is according to 5 structures that disclosed of claim the, and this brshless DC motor is can be fixed on the housing, makes this brshless DC motor can more convenient assembled use, and still can keep less thickness.

The utility model can provide a kind of brshless DC motor according to 4,5 structures that disclosed of claim the, and when its stator formed with canoe radially, this brshless DC motor also can form less thickness.

The utility model is according to 6 structures that disclosed of claim the, a kind of driving element with brshless DC motor can be provided, this driving element can be easily directly be fixed on wants the position fixed arbitrarily, can make the wiring of the control circuit of brshless DC motor connect simplification by this driving element, and make this brshless DC motor can form less thickness.

The utility model is according to 7 structures that disclosed of claim the, the monitoring line that can be pulled out easily, and with the monitoring as the motor rotation, or failure warning is used.

Claims (7)

1, a kind of brshless DC motor that improves structure, it is characterized in that: it comprises: stator is combined with pole piece and coil with central siphon; Rotor, by rotating shaft in conjunction with stator and establish annular magnet and be centered around around the stator; Driving element has drive circuit and sensing element, and is fixed on the lower position of annular magnet.

2, the brshless DC motor of improvement as claimed in claim 1 structure, it is characterized in that: stator includes a stator seat in addition, and stator seat is provided with for driving element is heavy and puts fixing deep gouge hole.

3, the brshless DC motor of improvement as claimed in claim 1 structure is characterized in that: include a housing in addition, this housing is provided with can be for the axle bed of stator combination, and housing is provided with for driving element is heavy and puts fixing counterbore.

4, the brshless DC motor of improvement structure as claimed in claim 1, it is characterized in that: stator can be to have the even number polar arm and is wound with coil.

5, the brshless DC motor of improvement structure as claimed in claim 1 is characterized in that: include a pedestal in addition, pedestal is provided with the axle bed that is nested with combination for stator, and pedestal also supplies the driving element secure bond.

6, the brshless DC motor of improvement as claimed in claim 1 structure, it is characterized in that: driving element is provided with four pins at least, and wherein two pins connect stator coils, and another pin draws and connects power supply, again a pin ground connection.

7, the brshless DC motor of improvement structure as claimed in claim 1 is characterized in that: one of them pin that it draws two pins that connect stator coil, a monitoring line is pulled out.

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