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Rotational position detector and motor equipped with rotational position detector

A technology for rotating position and detectors, which is applied in the direction of converting sensor output, instruments, measuring devices, etc., and can solve problems such as poor detection accuracy

Inactive Publication Date: 2003-10-08
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a problem that the detection accuracy is deteriorated because screws and welding parts are intervened, which will have a bad influence on the magnetic circuit.

Method used

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  • Rotational position detector and motor equipped with rotational position detector
  • Rotational position detector and motor equipped with rotational position detector
  • Rotational position detector and motor equipped with rotational position detector

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Experimental program
Comparison scheme
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Embodiment Construction

[0023] The rotary position detector of the present invention, such as figure 1 As shown, only a thin flat motor 4 with a large-diameter rotating shaft is installed. On the rotor side of the motor 4, the rotor 1 is concentrically installed on the circumference to form a number of protrusions corresponding to the number of magnetic pole pairs of the motor 4. At the same time, on the stator side of the motor 4, a part installed on the outer periphery of the rotor 1 is arranged through the gap, corresponding to the change of the gap magnetic flux caused by the rotation of the rotor 1, and the detection of the voltage signal based on the change of the rotation angle of the motor 4 head 2.

[0024] The probe head 2, such as figure 2 shown. It is composed of a bracket member 3 facing the rotor 1 with a gap and forming four magnetic pole teeth A-D at equal intervals, and an excitation coil CL1 and a detection coil CL2 respectively wound on the magnetic pole teeth A-D.

[0025] Th...

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PUM

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Abstract

The invention provides a rotational position detector and a motor equipped with rotational position detector. The detector comprising a detecting section inducing a voltage signal based on the variation in the rotational angle of the motor in response to variation in the air-gap magnetic flux caused by a rotor rotating in synchronism with the motor, wherein the detecting section is provided within an angular range of 2 pi / n with respect to the rotor, where n is the number of pairs of pole, and when the rotational position detector is fixed to the motor, a drive control circuit of the motor is assembled integrally at the position where the detecting section is disposed. A small, lightweight and easy-to-manufacture rotational position detector exhibiting a high degree of freedom for fixing to a motor and good assembling properties to a circuit board for drive control of the motor, and a motor equipped with the rotational position detector.

Description

technical field [0001] The present invention relates to a rotational position detector for detecting the rotational angle of a motor, and a motor with a rotational position detector for performing motor drive control while detecting the rotational position of the motor. Background technique [0002] Generally, when running a brushless synchronous motor, such as Figure 10 shown. Use the operating position detector 16 to detect the operating position of the motor 4, then in the motor control circuit 17, calculate according to the rotation position detection signal, and pass the switching circuit 18 according to the torque command input from the outside, so as to make the motor 4 rotate. Control of the current supply at which the output torque becomes a predetermined value. Here, for simplicity, only a single-phase structure is shown. [0003] As a rotary position detector 16, such as Figure 7 shown. Its basic structure (1 pair of magnetic poles) is a rotor composed of di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/20H02K29/12
CPCH02K29/12G01D5/2046H02P6/16
Inventor 塚田能成
Owner HONDA MOTOR CO LTD