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Motor control device

A control device and motor technology, applied in motor control, circuit device, DC motor speed/torque control, etc., can solve problems such as drive circuit damage

Active Publication Date: 2013-02-13
OMRON AUTOMOTIVE ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the devices of Patent Document 2 and Patent Document 3, it is necessary to additionally provide other components such as a cut-off prevention circuit and a diode.
In the case of connecting the power supply and the drive circuit without a switching element, if the positive and negative poles of the power supply (battery) are connected in reverse by mistake, the drive circuit will be destroyed immediately

Method used

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Examples

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Embodiment Construction

[0032] Embodiments of the present invention will be described below with reference to the drawings. In each figure, the same code|symbol is attached|subjected to the same part or a corresponding part.

[0033] figure 1 It is a figure which shows the structure of the motor control apparatus 1 which concerns on one Embodiment of this invention. The motor control device 1 is an ECU (Electronic Control Unit) used in an electric tailgate opening and closing system 100 of an automobile. The driving device 2 is a spindle type driving device that opens and closes the rear door of the automobile.

[0034] The motor 21 is a drive source of the drive device 2 and is constituted by a DC motor. The motor 21 is an example of the "motor" of the present invention. The encoder 22 is provided with two phases, and outputs pulse signals corresponding to the rotation states of the motor 21 in both forward and reverse directions.

[0035] The control unit 4 is constituted by a microcomputer. ...

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PUM

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Abstract

A motor control device has a drive circuit that drives an electric motor with a battery as a power supply, a switch element that is provided between the battery and the drive circuit, the switch element supplying a current from the battery to the drive circuit when being put into an on state, the switch element cutting off the current from the battery to the drive circuit when being put into an off state, a voltage detector that detects a voltage at the drive circuit, and a controller that operates the drive circuit to control the electric motor. The controller turns on the switch element when the voltage at the drive circuit, which is detected by the voltage detector, is greater than or equal to a first predetermined value during stopping of the control of the electric motor.

Description

technical field [0001] The present invention relates to a motor control device for controlling a motor driven by a battery as a power source. Background technique [0002] For example, there is a spindle-type driving device that automatically opens and closes a rear door of a vehicle as disclosed in Patent Document 1. As shown in FIG. In this driving device, based on the rotation of the built-in motor, the main shaft is moved in and out of the main body pipe to open and close the rear door. [0003] The electric motor is controlled by circuits disclosed in Patent Document 2 and Patent Document 3, for example. In addition, switching elements disclosed in Patent Document 2 and Patent Document 3, for example, are provided between the power supply and the drive circuit of the motor. By turning the switching element on or off, current is supplied from the power supply to the drive circuit or cut off. [0004] When the current supply is cut off and the motor is not controlled, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/06H02P7/29H02P7/291
CPCH02P7/285H02P29/024H02P7/06H02H9/04H02P7/00H02P29/0241
Inventor 福冈孝之山岸嘉希木户智志代田康峻
Owner OMRON AUTOMOTIVE ELECTRONICS CO LTD
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