CN201018384Y

CN201018384Y - Brushless vibrating motor

Info

Publication number: CN201018384Y
Application number: CNU2007201190210U
Authority: CN
Inventors: 潘政民; 董乐平
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd
Priority date: 2007-03-16
Filing date: 2007-03-16
Publication date: 2008-02-06
Anticipated expiration: 2017-03-16

Abstract

The utility model relates to a brushless vibration motor for solving the problem of that the motor is difficult to start under the state of dead point, which comprises a stator part; wherein the stator part comprises two deflecting coils symmetrically distributed on the stator; on the stator, the symmetric shaft line of the two deflecting coils is provided with an interpole coil. Compared with the existing technology, after the utility model adds the interpole coil in the symmetrically distributed area of the deflecting coil in the stator, the interpole coil produces a torque for driving a rotor to rotate when all deflecting coils are in the dead point position or Hall elements are in the magnetic field-free area, which thereby makes the vibration motor avoid the starting difficulty under the state of dead point.

Description

Brushless vibrating dynamo

Technical field

The utility model relate to a kind ofly be applicable in the mobile communications device, vibrating motor that silent alert is used, particularly a kind of brushless direct-current vibrating motor.

Background technology

The silent alert vibrating motor that is used for mobile communications device such as mobile phone mainly contains columnar iron core motor, drag cup motor and flat electric machine or the like several types product; There is the difference of brushless and commutator then to be divided into two types of brush motor and brushless electric machines again according to direct current machine.DC Brushless Motor has identical operation principle with general DC motor, and its formation is different.Brushless electric machine can cause that because of having removed mutual friction spark produces the brush and the commutator of powder, has low noise, no electromagnetic interference and steady performance.Brshless DC motor drives and controls motor rotation by commutating circuit, for this low-power machine of vibrating motor, integrated detection rotor-position and the drive controlling single application-specific integrated circuit (ASIC) in one has appearred on the market, as the direct current motor drive circuit module of the A1441 of U.S. ALLEGRO company band Hall element, this helps further dwindling the entire product volume.Control circuit wherein is used for controlling rotating speed of motor, turns to, the overcurrent of electric current (or torque) and protection motor, overvoltage, overheated etc.

In brushless electric machine, rotor portion is installed annular multi-pole magnet by eccentric pallet usually and is constituted, in order further to improve vibration force, can increase the balancing weight that a proportion is higher than iron therein, stationary part then comprises the control IC of deflecting coil and band Hall unit.If motor when halted state, during the occuping a certain specified magnetic pole transition region or Hall unit and be in no field region of the whole symmetry of each deflecting coil, will produce the starting difficulty problem just.

The utility model content

Technical problem to be solved in the utility model is: provide a kind of brushless vibrating dynamo, to solve the startup difficult problem of motor under the state of dead point.

For solving the problems of the technologies described above, the utility model proposes technical scheme: a kind of brushless vibrating dynamo, comprise stationary part, stationary part comprises two deflecting coils that are symmetrical distribution on the stator; On stator, an interpole coil is set on the axis of symmetry of described two deflecting coils.

Further improvement of the utility model is: in the loop of described interpole coil, and the current-limiting resistance of connecting.The effect of this current-limiting resistance is to be used for size of current in the control loop.

Preferred version of the present utility model is: described brushless vibrating dynamo comprises the control IC of being with Hall element, and the control IC of described band Hall element is installed on the pcb board.

Preferred version of the present utility model is: described deflecting coil and interpole coil all are fixed in the stator with injection molding.

The beneficial effects of the utility model: compared to existing technology, after the utility model zone that deflecting coil is symmetrically distributed in stator has increased interpole coil, when the occuping a certain specified magnetic pole transition region or Hall unit and be in no field region of the whole symmetry of each deflecting coil, this interpole coil will produce a torque that drives the rotor running, thereby avoid the startup difficulty of vibrating motor.

Description of drawings

Fig. 1 is the front view of a kind of embodiment of the present utility model.

Fig. 2 is the left apparent direction cutaway view of Fig. 1.

Fig. 3 be Fig. 1 look up the direction cutaway view.

Fig. 4 is the front view of Fig. 1 rotor.

Fig. 5 is the left apparent direction cutaway view of Fig. 4.

Fig. 6 is the rearview of Fig. 4.

Fig. 7 is the front view of stator among Fig. 1.

Fig. 8 is a circuit connection diagram of the present utility model.

Embodiment

The utility model is a kind of brushless vibrating dynamo, below in conjunction with accompanying drawing 1 to Fig. 8 technical solutions of the utility model is described in detail.Wherein Fig. 1, Fig. 2 and Fig. 3 are the structure chart of vibrating motor, and Fig. 4, Fig. 5 and Fig. 6 are the structure chart of rotor, and Fig. 7 is the structure chart of stator, and Fig. 8 is a circuit diagram.

Loam cake 1 and base 2 constitute spatial accommodation, and rotor 100 and stator 200 are installed therebetween.Rotor 100 is made of pallet 9, annular multi-pole magnet 8 and balancing weight 10, and annular multi-pole magnet 8 and balancing weight 10 adopt bonding together or alternate manner is installed on the pallet 9.Rotor 100 is installed in base 2 and the loam cake 1 by rotating shaft 11A and embedded bearing 11B thereof, at axle 11A and bearing 11B two ends Upper gasket 6A, lower gasket 6B is set.Stationary part 200 is installed on the base 2, and its control IC 7 and pcb board 4 by left avertence switch coil L1 and right avertence switch coil L2, interpole coil L3 and band Hall element is constituted.Deflecting coil L1 and deflecting coil L2 distribute along diameter symmetry of circular stator 200, adopt bonding or the injection moulding mode attached on the pcb board.The center of interpole coil L3 occupy on this diameter, and the line of itself and rotating shaft 11A is perpendicular to the line of centres of deflecting coil L1 and deflecting coil L2.The fixed form of deflecting coil L3 also can be taked bonding or injection mo(u)lding.In order to control by the size of current among the deflecting coil L3 series connection one resistance R in its loop.Brushless vibrating dynamo is electrically connected with input circuit by lead terminal 13, and concrete electrical connection graph is referring to accompanying drawing 8.

The utility model increases a deflecting coil L3 by the zone that deflecting coil L1, deflecting coil L2 on stator 200 are symmetrically distributed, when deflecting coil L1, deflecting coil L2 all are in Hall unit among position, dead angle or the IC7 and are in no field region, deflecting coil L3 will produce a torque that drives the rotor running, thereby avoid the startup difficulty of vibrating motor.

Claims

1. a brushless vibrating dynamo comprises stationary part, and stationary part comprises two deflecting coils that are symmetrical distribution on the stator, it is characterized in that: on stator, an interpole coil is set on the axis of symmetry of described two deflecting coils.

2. brushless vibrating dynamo according to claim 1 is characterized in that: in the loop of described interpole coil, and the current-limiting resistance of connecting.

3. brushless vibrating dynamo according to claim 1 is characterized in that: described brushless vibrating dynamo comprises the control IC of being with Hall element, and the control IC of described band Hall element is installed on the pcb board.

4. brushless vibrating dynamo according to claim 1 is characterized in that: described deflecting coil and interpole coil all are fixed in the stator with injection molding.