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Motor with magnetic-sensing balance sheet

A magnetic balance and motor technology, applied in the field of motors, can solve the problems of insufficient rotation balance structure and no magnetic induction part, so as to ensure the rotation efficiency, avoid shaking, and improve the starting stability.

Active Publication Date: 2008-07-02
SUNONWEALTH ELECTRIC MACHINE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in fact, in many of the above-mentioned rotation balance structures, the pole gap position of the pole surface is not provided with a magnetic sensing part, or only a part of the pole gap position is asymmetrically covered by a magnetic sensing part with a large area, which often results in rotation. The balance structure can not achieve the expected balance effect

Method used

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  • Motor with magnetic-sensing balance sheet
  • Motor with magnetic-sensing balance sheet
  • Motor with magnetic-sensing balance sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] As shown in FIG. 1 , the present invention includes a fixing part 10 , a rotor 20 and a magnetically sensitive balance piece 30 , and the present invention can be applied to the fields of high-tech motors such as cooling fans or optical disk drive spindle motors.

[0053] As shown in Figure 1, Figure 2 and Figure 3, the fixed part 10 includes a base 11 combined with the motor housing, a shaft tube 12, at least one bearing 13 accommodated inside the shaft tube 12, a stator group 14 and a circuit board 15 .

[0054]The shaft tube 12 can be separately manufactured and assembled on the base 11 or directly integrally formed on the base 11 .

[0055] The circuit board 15 and the stator assembly 14 are sheathed on the outer periphery of the shaft tube 12 .

[0056] The bearing 13 can be selected from known bearings such as oil-impregnated bearings, ball bearings, fluid dynamic bearings or magnetic bearings.

[0057] The stator assembly 14 can be selected as a radial winding ...

Embodiment 2

[0068] As shown in Fig. 4, Fig. 5 and Fig. 6, compared with Embodiment 1, the magnetically sensitive balancing sheet 30a of the present invention can also be formed by extending axially from the outer peripheral edge to form at least two magnetically sensitive surfaces 32a, and the magnetically sensitive surfaces 32a are also opposite to each other. It is located at each pole gap 143 of the stator set 14 and faces the inner peripheral surface of the ring magnet 23 of the rotor 20 at the same time. Furthermore, the span of the magnetic sensing surface 32 a is greater than the length of the pole gap 143 , and the magnetic sensing surface 32 a and two adjacent magnetic pole surfaces 140 have two overlapping lengths L1 , L2 of unequal length. Wherein, at least one overlapping length L1 is preferably less than 1 / 2, especially 1 / 3, of the total length of the magnetic pole surface 140 . At the same time, another overlapping length L2 can be selected to be greater than 1 / 2 of the tota...

Embodiment 3

[0070] As shown in Fig. 7, Fig. 8 and Fig. 9, compared with Embodiment 1, the magnetically sensitive balancing sheet 30b of the present invention forms several notches 33 corresponding to the magnetic pole faces 140 of the stator group 14, and simultaneously forms the pole gaps 143 corresponding to the stator group 14 There are several extension parts 34, and several magnetically sensitive surfaces 32b are directly formed on the upper surface of the end part of the extension part 34. The magnetically sensitive balancing sheet 30 b can also be selectively attached to the lower surface or the upper surface of the circuit board 15 . During assembly, the magnetically sensitive surface 32 b is preferably located at the position of each pole gap 143 of the stator assembly 14 , and faces the bottom surface of the ring magnet 23 of the rotor 20 at the same time. Furthermore, the magnetically sensitive surface 32b of the extension portion 34 is not less than the length of the pole gap ...

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Abstract

This invention relates to a motor with magnetized balance plates including a fixed part, rotors and at least a magnetized balanced plate on the fixed part, in which, the fixed part is set with a stator group having at least a magnetic pole plate and a coil winding, the magnetic pole plate extends to generate several magnetic faces of an alternating magnetic field generated by the induction of the turned-on coil winding, two adjacent magnetic pole faces form a pole gap, the rotor includes a shaft rod rotationally combined to the fixed part and a ring magnet set in the internal circumference and corresponding to the magnetic pole face of the stator set, the magnetized balanced plate is set with two magnetized faces corresponding to the pole gap position, the magnetized face is not less than the length of the pole gap to make gaps between the faces opposite to a surface of the rotor ring magnet.

Description

technical field [0001] The invention belongs to electric motors, in particular to electric motors with magnetic induction balance sheets. Background technique [0002] The balance structure of the known motor rotor, such as Announcement No. 383818 'Radiator Fan Group Structure with Magnetic Positioning', No. 423760 'Brushless DC Motor Structure', No. 422365 'Radiator Structure with Magnetic Positioning Fan Group' ', No. 428838 'Motor Rotor Positioning Structure', No. 539355 'Motor Balance Sheet Structure', No. 501823 'Motor Balance Ring Structure', No. 562330 'Spindle Motor Pre-force Magnet Positioning Structure', No. M243848 No. "Motor Rotational Balance Structure" and No. M241969 "Fan Motor" New Patent, which generally includes a fixed part, a rotor, a magnetic attraction part and a magnetic induction part. [0003] The fixing part is provided with a base, a shaft tube fixed on the base, a bearing accommodated in the shaft tube, a stator group and a circuit board. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K7/04H02K1/12
Inventor 陈明煌
Owner SUNONWEALTH ELECTRIC MACHINE IND
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