Temperature estimating device and temperature estimating method

A technology for estimating values ​​and temperature rises, applied to thermometers, measuring devices, and electric devices, etc., which can solve problems such as inability to accurately estimate the temperature of target parts

Inactive Publication Date: 2012-10-17
ADVICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the amount of heat dissipation from the target component cannot be estimated while taking into account the temperature of peripheral components located around the target component, there is a possibility that the temperature of the target component cannot be accurately estimated after the drive of the motor is stopped.

Method used

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  • Temperature estimating device and temperature estimating method
  • Temperature estimating device and temperature estimating method

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Embodiment Construction

[0034] Below, according to Figure 1 to Figure 11 An embodiment embodying the present invention will be described. Such as figure 1 as well as figure 2 As shown, the electronic device of this embodiment is a brake hydraulic unit 12 that is driven to adjust the braking force applied to a wheel 11 mounted on a vehicle. The brake hydraulic unit 12 includes a motor 20, a substantially rectangular parallelepiped housing (equipment component) 30 to which the motor 20 is attached, and is fixed at a position different from the mounting position of the motor 20 in the housing 30 (in this case, In the embodiment, the storage box 40 at the position on the opposite side).

[0035] The motor 20 of this embodiment is a DC motor with brushes. Such a motor 20 includes: a bottomed substantially cylindrical yoke (device constituent member) 21 opening toward the housing 30 side, a plate-shaped end plate (device constituent member) 22 closing the opening of the yoke 21 , and a The rotor 24...

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Abstract

The invention relates to a temperature estimating device and a temperature estimating method.A temperature estimating unit includes an energy calculating unit that calculates a heat generation energy rate of a motor on the basis of a difference between power input to the motor and power output from the motor, a heat radiation energy calculating unit that calculates a heat radiation energy rate from a target member on the basis of a difference between a previous temperature estimation value Tm of the target member and an ambient temperature, and a thermal coefficient of the target member, and an amount calculating unit that calculates a temperature increase rate of the target member on the basis of a difference between the heat generation energy rate and the heat radiation energy rate, and an estimation value calculating unit that calculates a current temperature estimation value of the target member on the basis of the temperature increase rate and the previous temperature estimation value.

Description

technical field [0001] The present invention relates to a temperature estimating device and a temperature estimating method for estimating the temperature of device components constituting an electronic device including a motor. Background technique [0002] Conventionally, an electric power steering apparatus described in Patent Document 1, for example, has been proposed as an electronic device including a motor. This patent document 1 discloses a method of calculating an estimated value of the temperature increase amount of the motor without using a sensor for detecting the temperature of the motor. Specifically, the estimated value (Δθ) of the temperature increase amount of the motor is calculated based on the relational expression (Expression 1) shown below. Then, the estimated temperature value of the motor is obtained by adding the estimated value (Δθ) of the amount of temperature increase calculated in this way to the temperature before the start of driving of the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/00
CPCG01K2205/00G01K7/42
Inventor 宇佐美忠庆吉冈信彦
Owner ADVICS CO LTD
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