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Resolver, motor and power steering apparatus

An angle resolver and angle resolution technology, which is applied to power steering mechanisms, electromechanical devices, steering mechanisms, etc., can solve problems such as the influence of harmonic components and the influence of detection accuracy

Active Publication Date: 2008-04-02
NIPPON DENSAN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in such a resolver, the harmonic component in the induced voltage generated in the output coil affects the accuracy of detection, and the configuration of the rotor of the resolver affects the harmonic component

Method used

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  • Resolver, motor and power steering apparatus
  • Resolver, motor and power steering apparatus
  • Resolver, motor and power steering apparatus

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Embodiment Construction

[0015] Power steering

[0016] It should be noted that in the description of the preferred embodiments of the present invention, words used to describe the positional relationship and direction between the various components (for example, up, down, left, right, up, down, top and bottom ) Only shows the positional relationship and direction in the drawings. These words do not indicate the positional relationship and direction of the components installed in the actual device. In addition, it should be noted that the reference numerals, figure numbers, and supplementary explanations are shown below to help readers find corresponding components in the following description of the preferred embodiments, so as to facilitate the understanding of the present invention. It should be understood that these expressions are in no way intended to limit the scope of the present invention.

[0017] FIG. 1 is a schematic diagram of an electric power steering device 6 with a variable reluctance typ...

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PUM

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Abstract

The invention provides a resolver, a motor and a power steering device. A variable reluctance type resolver includes: a resolver stator portion, which is substantially ring-shaped centered on a central axis; and a resolver rotor portion, which is attached to the shaft of the rotor portion of a motor and set Inside the resolver stator section. When by using the maximum value (gmax) of the gap g between the rotor core and the resolver stator part at a predetermined point on the outer peripheral edge of the rotor core, the minimum value (gmin) of the gap g, defined by the predetermined point and the reference point When the size of the gap g is set by the angle θ, the shaft multiplier n and the coefficient, the resolver according to the present invention is operable to improve the accuracy of detecting the rotation angle.

Description

Technical field [0001] The present invention relates to a variable reluctance type resolver, an electric motor having the resolver, and a power steering device. Background technique [0002] Traditionally, a hydraulic power steering device has been used as a device for assisting steering of automobiles and the like, in which a pump generates hydraulic pressure through an engine output to assist steering. In addition, an electric power steering device (hereinafter, referred to as "EPS") is used as a device for assisting the steering of an automobile or the like in which a vehicle battery of the automobile rotates a motor. EPS does not use engine output and is a more efficient system than hydraulic power steering. [0003] In order to achieve high-precision control of the system, the EPS needs an angle detection device operable to detect the high-precision rotation angle of the motor. Cars are required to operate accurately for a long time in various types of environments. Therefor...

Claims

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Application Information

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IPC IPC(8): G01D5/245H02K33/00B62D1/04
CPCH02K24/00H02K11/0031G01D5/2013B62D5/0403H02K11/225
Inventor 牧野祐辅
Owner NIPPON DENSAN CORP
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