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Brush direct-current motor

A technology of DC motors and motors, applied in DC commutators, electrical components, electromechanical devices, etc., can solve problems such as increased power coefficients, achieve the effects of reducing calorific value, suppressing the increase in size, and reducing circulating current

Active Publication Date: 2014-04-16
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, regarding the voltage applied to the motor, since the guaranteed voltage of the battery mounted on the car becomes the maximum voltage, the power coefficient is increased by increasing the current

Method used

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  • Brush direct-current motor
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  • Brush direct-current motor

Examples

Experimental program
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Embodiment Construction

[0048] Hereinafter, an embodiment will be described using the drawings.

[0049] figure 1 It is a cross-sectional view of the brushed DC motor of the present invention viewed from the side. In the brushed DC motor mechanism, the armature 3 is disposed on the inner circumference of the yoke 1 and the field magnet 2 .

[0050] The armature 3 includes a shaft 4 and is supported by an output shaft side bearing 5 and an output shaft opposite side bearing 6 provided at the shaft center of the brushed DC motor. In addition, the output shaft side bearing 5 is held by the brush holder plate 12 , and the brush holder plate 12 is held by the yoke 1 . Next, a commutator 7 and an armature core 8 are provided on the shaft 4 , and a coil 9 is wound around the slots of the armature core 8 . Both ends of the coil 9 are connected to segments constituting the commutator 7 .

[0051] When a voltage is applied to the brushed DC motor, current flows through the brushes 10 held by the brush hold...

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PUM

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Abstract

The invention provides a brush direct-current motor which possesses a plurality brushes and can restrain the increase of a motor size so as to reduce ineffective circulating current for motor performance and to minimize calorific value. The brush direct-current motor possesses a first brush, a second brush homopolar with the first brush, and a choking coil in connection with the first brush and the second brush; one end of the choking coil is respectively in connection with the first brush and the second brush in a series connection mode; the choking coil is configured in such as way that the longer direction of the choking coil is in the diameter direction of the motor.

Description

technical field [0001] The present invention relates to brushed DC motors. Background technique [0002] Brushed DC motors are relatively easy to obtain high output, so they are widely used, for example, as motors for driving hydraulic pumps in automobiles. [0003] In recent years, in order to improve the low fuel consumption of automobiles, auxiliary equipment for automobiles represented by hydraulic pumps has been electrified, and the number of mounted DC motors tends to increase. Therefore, it is necessary to promote downsizing and weight reduction while maintaining the output of the motor, and the output factor (the value obtained by dividing the output of the motor by the volume of the motor) has been rising. In addition, regarding the voltage applied to the motor, since the guaranteed voltage of the battery mounted on the car becomes the maximum voltage, the power factor increases by increasing the current. [0004] On the other hand, electromagnetic interference ha...

Claims

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Application Information

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IPC IPC(8): H02K23/00H02K23/66
Inventor 岩城秀文国谷健司谷口司野嵜大辅佐川利和
Owner HITACHI ASTEMO LTD
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