CN2273074Y

CN2273074Y - Ultra-thin and short cooling fan motor

Info

Publication number: CN2273074Y
Application number: CN 96239962
Authority: CN
Inventors: 洪银树
Original assignee: Sunonwealth Electric Machine Industry Co Ltd
Current assignee: Sunonwealth Electric Machine Industry Co Ltd
Priority date: 1996-09-04
Filing date: 1996-09-04
Publication date: 1998-01-21
Anticipated expiration: 2006-09-04

Abstract

A stator coil of the motor consists of a single coil, two end joints of the single coil are connected with an interaction circuit, two ends of the coil are changed into positive and negative, current in the single coil is conducted in a positive and negative interaction mode to drive a motor rotor to rotate, the interaction circuit comprises two groups of transistor groups conducted in an interaction mode, the stator coil of the motor is connected between two transistors conducted at the same time, the two groups of transistor groups are conducted in an interaction mode, and current in the coil flows in a positive and negative interaction mode.

Description

The short and small type radiator fan motor of super book

A kind of Short Ultra-Thin Small Cooling Fan Motor, it is made of single group for a kind of stator coil, makes two ends of coil become the forward and reverse conduction of both positive and negative polarity to form alternating magnetic field by the triggering of mutual control circuit, with the radiator fan motor of driving rotor rotation.

Along with making rapid progress of science and technology, radiator fan motor also develops towards the direction of miniaturization, yet, the biggest problem that the radiator fan motor miniaturization is run into is the coil part of motor itself, because coil is for producing the main element in magnetic field, and relate to multinomial factors such as impedance, the number of turn again, therefore, the miniaturization spatially of the coil of motor is the puzzlement of a maximum facing of radiator fan motor.

Moreover, have the operating principle circuit diagram and the coil structure figure of radiator fan motor as shown in Figures 1 to 3 now, the stator of motor is made up of two groups of coil a1, a2 basically, induction output by hall sensing element b, can trigger two transistor c1, c2 conducting respectively, and then can impel two groups of coil a1, a2 to form mutual conducting, and produce alternating magnetic field, turn round with the CD-ROM drive motor rotor.

Yet the stator coil of existing radiator fan motor is made of two groups of coils, therefore, and in the design of miniaturization and make because of difficult and inconvenient.

Main purpose of the present utility model is to provide a kind of Short Ultra-Thin Small Cooling Fan Motor, its coiler part at the motor stator structure is improved, and the design of cooperation control circuit, make the radiator fan motor product can be more further with volume-diminished, meeting the tendency of the day, and make the work of coiling coil more easy.

The purpose of this utility model is to realize like this, a kind of Short Ultra-Thin Small Cooling Fan Motor promptly is provided, stator coil is made up of single coil, two tip nodes of described single coil link to each other with a mutual circuit, coil two ends are mutually the variation of positive and negative polarity, and the electric current of single coil inside becomes the reciprocal cross mutual conductance to lead to and the CD-ROM drive motor rotor rotation.

Below in conjunction with accompanying drawing, embodiment of the present utility model is described, wherein:

Fig. 1 is the control circuit figure of existing motor;

Fig. 2 is the stereogram of the stator coil of existing motor;

Fig. 3 is the circuit diagram of the coil of existing motor;

Fig. 4 is the stereogram of stator coil of the present utility model;

Fig. 5 is the circuit diagram of stator coil of the present utility model;

Fig. 6 is control circuit figure of the present utility model;

Fig. 7 makes the schematic diagram of IC for the utility model control circuit.

Consult shown in Fig. 4 to 6, the stator coil of the utility model radiator fan motor is made up of independent one group of coil 1, and only need draw two point, the two

point

11,12 of this coil 1 is subjected to the control of mutual circuit 2, can form the forward and reverse conduction of both positive and negative polarity, then independent one group of coil 1 can produce alternating magnetic field, turns round with the CD-ROM drive motor rotor.Below be described as follows with regard to the operating principle of control circuit of the present utility model:

The Hall element 3 of radiator fan motor can be responded to N, the S polarity of magnetic pole, thus the output pulse wave signal.When Hall element 3 is output as high potential (Hi), can trigger and make transistor 21,22,23 conductings (ON), also conducting of transistor 24 (ON) simultaneously, make transistor 25,26,27 by (OFF), therefore, contact 11 at coil 1 forms positive potential, and contact 12 forms negative potential, and the electric current in the coil 1 is for to flow to contact 12 by contact 11.Otherwise, when Hall element 3 is output as electronegative potential (Lo), transistor 21,22,23 is by (OFF), and transistor 24 is also by (OFF) simultaneously, then transistor 25,26,27 is triggered and conducting (ON), therefore, is negative potential at the contact 11 of coil 1, and contact 12 is a positive potential, and the electric current in the coil 1 is for to flow to contact 11 by contact 12.So, interactive action again and again, the electric current that just can form forward and reverse conduction in coil 1 passes through, and makes coil 1 produce alternating magnetic field, with the CD-ROM drive motor rotor rotation.

See also shown in Figure 7 again, the stator coil of the utility model motor is made up of single coil 1, and all crystals pipe and resistive element in the mutual circuit 2 can be designed to minimum integrated circuit (IC) wafer by semiconductor technology, with all mutual circuit 2 make a minimum integrated circuit (IC) wafer 2 ', more can reach the miniaturization purpose of radiator fan motor.

See also shown in Fig. 2,4, the utility model cooperates the control of mutual circuit 2 with the design of single coil 1 again, makes single coil 1 can produce alternating magnetic field, turns round with the CD-ROM drive motor rotor.And the occupied bulk of single coil 1, for example height h1, outside diameter d 1, all occupied height h2 and the outside diameter d 2 of the coil groups that constitutes than two groups of coil a1, a2 of existing radiator fan motor is little a lot.

In addition, the utility model stator structure is single coil 1, possesses following several characteristics in design:

1, be forward and reverse conduction because of single coil 1, therefore, two groups of coils can eliminating existing radiator fan motor are when mutual conducting, and the electric current of the back electromotive force of its coil remains in coil inside and flows, reduce the rising of coil inside temperature, thereby prolong the useful life of electronic component.

2, because of the forward and reverse conduction of single coil 1, can eliminate the back electromotive force of coil, reduce the revolution electric current of motor, the behavior in service of motor and efficient are all relatively improved.

3, formed with single coil because of stator coil, so winding mode is simple, quick, under a large amount of production, product quality is guaranteed easily.

Claims

1. An ultra-thin, short and small cooling fan motor, characterized in that the stator coil of the motor is made up of a single coil, and the two-terminal contacts of the single coil are connected with an interactive circuit, and the two ends of the coil form positive and negative polarity changes, The current inside the single coil conducts positively and negatively alternately to drive the motor rotor to rotate.

2. The ultra-thin and short cooling fan motor according to claim 1, wherein the interactive circuit includes two transistor groups that are alternately conducted, and the stator coil of the motor is connected to the two transistors that are simultaneously conducted. During this period, the two groups of transistors are turned on alternately, and the current inside the coil flows forward and reverse alternately.

3. The ultra-thin and short cooling fan motor according to claim 1 or 2, wherein the interactive circuit is an integrated circuit (IC) chip.