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Electric actuator

An electric actuator and electrical connection technology, applied in the direction of electric components, electromechanical devices, electrical components, etc., can solve problems such as motor performance degradation, and achieve the effect of suppressing performance degradation

Pending Publication Date: 2022-04-12
NIDEC TOSOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the method of directly detecting the magnetic poles of the rotor with a magnetic sensor, since the magnets installed so as to be in the same phase as the magnetic poles of the rotor are out of phase with the rotor, there is a possibility of energization due to a deviation in the detection timing of the sensor. The performance of the motor is reduced due to the delay of the timing

Method used

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Embodiment Construction

[0013] Hereinafter, an electric actuator according to an embodiment of the present invention will be described with reference to the drawings. In addition, the scope of the present invention is not limited to the following embodiments, and can be changed arbitrarily within the scope of the technical idea of ​​the present invention. In addition, in the following drawings, in order to facilitate understanding of each structure, the actual structure may be different from the scale, number, etc. in each structure.

[0014] In each figure, the Z-axis direction is a vertical direction in which the positive side is the upper side and the negative side is the lower side. The axial direction of the central axis J1 appropriately shown in each figure is parallel to the Z-axis direction, that is, the up-down direction. In the following description, unless otherwise specified, the direction parallel to the axial direction of the central axis J1 is simply referred to as "axial direction". ...

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Abstract

The invention provides an electric actuator. The electric actuator comprises a motor part; a magnet; a bus bar; a bus bar holder that holds the bus bar; a magnetic sensor fixed to the bus bar holder and capable of detecting the magnetic field of the magnet; a conductive wire electrically connected to the magnetic sensor; and a circuit board electrically connected to the motor unit. The magnetic sensor is disposed so as to face one side of the magnet in the axial direction with a gap therebetween, and the conductive wire passes through the bus bar holder from inside the bus bar holder and is electrically connected to the circuit board.

Description

technical field [0001] The present invention relates to electric actuators. Background technique [0002] In the rotation control of a motor in an electric actuator, it is known to detect a change in a magnetic field by a magnetic sensor. For example, Patent Document 1 discloses a configuration in which a magnet is attached to a motor shaft so as to be in phase with a magnetic pole of a rotor using a magnetic sensor arranged on a circuit board. Usually, a method of directly detecting the magnetic poles of the rotor with a magnetic sensor is used without attaching a magnet to the motor shaft. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2019-198191 [0004] In the method of directly detecting the magnetic poles of the rotor with a magnetic sensor, since the magnets installed so as to be in the same phase as the magnetic poles of the rotor are out of phase with the rotor, there is a possibility of energization due to a deviation in the detection timing of the se...

Claims

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Application Information

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IPC IPC(8): H02K7/116H02K7/08H02K11/215H02K5/16H02K3/50F16H3/04F16H57/023
Inventor 白井宽伊东阳介
Owner NIDEC TOSOK CORP