Brushless motor

A technology of brushless motors and motor housings, which is applied in the manufacture of motor generators, electric components, electrical components, etc., can solve the problems of complicated manufacturing processes, high manufacturing costs, and increased volume of motors, and achieve simplified manufacturing processes , Ensuring heat dissipation and reducing manufacturing costs

Inactive Publication Date: 2013-04-24
MITSUBA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, not only the manufacturing process is complicated, but also the manufacturing cost becomes high.
In addition, since the motor casing and the storage member have to be thickened, there may be a problem that the volume of the motor increases.

Method used

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  • Brushless motor
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0125] Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

[0126] figure 1 It is a schematic diagram explaining the outline of an electric power steering device having a brushless motor of the present invention, figure 2 is true figure 1 A cross-sectional view showing the detailed structure of the brushless motor, image 3 is true figure 1 The three-dimensional exploded view of the brushless motor for decomposition representation, Figure 4 It is a schematic diagram explaining the fastening procedure of the fixing part on the motor case side to the motor case, Figure 5 It is a partially enlarged cross-sectional view showing the connecting portion of the motor case and the storage member, Figure 6 yes Figure 5 An enlarged cross-sectional view of part A of the dotted circle, Figure 7 It is a schematic diagram explaining the connection procedure of the motor case and the housing part.

[0127] Such as figure 1 As sh...

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PUM

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Abstract

The invention discloses a brushless motor which can ensure heat dissipation of a control device and meanwhile manufacturing process is simplified, manufacturing cost is reduced, and the brushless motor is minimized and has light weight. the brushless motor includes: a motor case 41 in which a cylindrical stator core 42 formed from steel plate by press molding is secured; a bracket 48 on one side in an axial direction of a motor case, a tip side of a rotary shaft 46 secured to a rotor 45 being rotatably supported by the bracket; and a housing member 51 on the other side in the axial direction of the motor case, a control device 52 for controlling the rotation of the rotor being accommodated in the housing member, the control device having a power-related circuit board 53 disposed on the side of a bottom 51b of the housing member and a control-related circuit board 54 disposed on the side of an opening of the housing member, semiconductor switching devices SW being disposed on the power-related circuit board in contact with the housing member.

Description

technical field [0001] The present invention relates to a brushless motor having a stator core and a rotor rotating inside the stator core, and is particularly suitable for use as a vehicle-mounted drive source. Background technique [0002] Conventionally, vehicles such as automobiles are equipped with an electric power steering system (EPS) that assists a steering operation of a steering wheel by a driver. The electric steering device uses a brushless motor with good control performance as the drive source. Therefore, by controlling the brushless motor in the forward and reverse directions with high precision according to the steering angle of the steering wheel, it can give the driver an appropriate operating feeling. Such use of a brushless motor as a drive source of an electric power steering device is known, for example, as described in Patent Document 1. [0003] The motor (brushless motor) described in Patent Document 1 has a cylindrical aluminum motor case (motor c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/00H02K29/08H02K5/04H02K5/10H02K13/00H02K15/00
CPCH02K29/08H02K13/00H02K15/00H02K11/0073H02K29/00H02K5/04H02K5/10H02K11/0068H02K11/00H02K11/30H02K11/33
Inventor 池野弘达冈本敦志小川佑弥
Owner MITSUBA CORP
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