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Position estimation method, position estimation device, and motor module

A technology of motor and rotating position, which is applied in the direction of measuring device, electric device, starting device, etc., can solve the problems of increasing manufacturing cost and difficulty in miniaturizing motor modules.

Pending Publication Date: 2020-10-20
NIDEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These position sensors make it difficult to miniaturize the motor module and increase its manufacturing cost

Method used

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  • Position estimation method, position estimation device, and motor module
  • Position estimation method, position estimation device, and motor module
  • Position estimation method, position estimation device, and motor module

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Embodiment Construction

[0034] In a non-limiting exemplary embodiment, the position estimation method of the present disclosure estimates the rotational position of a rotor of a motor including a rotor having a plurality of magnetic poles and a stator having a plurality of windings. The electric motor further includes a sensor device that outputs an electrical signal that changes periodically in accordance with the rotation of the rotor. A typical example of the sensor device is a non-contact magnetic sensor that converts a magnetic field generated in a motor into an electric signal and outputs it, such as a Hall element.

[0035] This position estimation method includes the following processes (1) to (3).

[0036] Process (1): Acquire the learning data including an arrangement of a plurality of measured values ​​defining a waveform characteristic of an electrical signal (first electrical signal) output from the sensor device when the rotor rotates, from a storage medium storing learning data. For e...

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Abstract

The position estimation method according to the present disclosure includes: acquiring learning data from a storage medium that stores learning data including a string of a plurality of measurement values defining the waveform characteristics of first electrical signals outputted from a sensor device when a rotor R is rotating; acquiring a string of a plurality of detection values defining the waveform characteristics of second electrical signals outputted from the sensor device when the rotor starts to rotate from a stopped state; and performing matching between the increase / decrease patternof the string of the measurement values and the increase / decrease pattern of the string of the detection values, thereby estimating the relationship between the rotational position of the rotor when the first electrical signals are outputted and the rotational position of the rotor when the second electrical signals are outputted.

Description

technical field [0001] The present application relates to a position estimation method and a position estimation device. In addition, the present application relates to a motor module including a signal processing circuit for estimating a position. Background technique [0002] A motor such as a permanent magnet synchronous motor generally includes a rotor having a plurality of magnetic poles, a stator having a plurality of windings, and a sensor device that outputs an electrical signal that changes periodically in accordance with the rotation of the rotor. When it is necessary to measure the rotation angle (position) of the rotor with high resolution, a position sensor such as a rotary encoder or a resolver is used. These position sensors make it difficult to miniaturize the motor module and increase its manufacturing cost. [0003] International Publication No. 2016 / 104378 discloses a method and an apparatus capable of detecting the position of a rotor with high precisio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/16
CPCG01D18/008G01D5/145H02P6/20H02P21/0025G01B7/30G01R15/202G01R19/0092H02P6/16
Inventor 石上翔太藤田淳
Owner NIDEC CORP