Control apparatus and shift-by-wire system having the same

A technology for controlling equipment and controllers, applied in control systems, mechanical equipment, transmission control, etc., can solve problems such as not being able to learn the standard position correctly

Active Publication Date: 2015-06-10
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the system includes physical circuitry for sensing the sum of the currents flowing through the phases of the windings of the motor, and / or when the system includes physical circuitry for limiting the current flowing through the windings, if the circuitry is damaged, it may not be possible Learn the standard position correctly

Method used

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  • Control apparatus and shift-by-wire system having the same
  • Control apparatus and shift-by-wire system having the same
  • Control apparatus and shift-by-wire system having the same

Examples

Experimental program
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Embodiment Construction

[0019] Embodiments of the present disclosure will be explained with reference to the drawings.

[0020] (Example)

[0021] figure 1 An electronic control unit (ie, ECU) 60 as a control device and a shift-by-wire system 1 having the ECU according to the present example embodiment are shown. The shift-by-wire system 1 includes an actuator 10, a shift position switching device 30, an ECU 60, and the like. For example, the system 1 is mounted on a vehicle together with an automatic transmission 3 . The system 1 drives the actuator 10 and the shift position switching device 30 according to the instruction of the vehicle driver, thereby switching the shift position of the automatic transmission 3 by wire control.

[0022] The actuator 10 includes a housing 11 , a motor 20 , an encoder 12 , a speed reducer 13 and an output shaft 14 .

[0023] In the current exemplary embodiment, the motor 20 is, for example, a switched reluctance motor (ie, an SR motor), which is a three-phase dr...

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Abstract

A control apparatus controlling a motor for driving an object to switch a shift range of a transmission includes: switching devices for energization to windings of the motor; a controller for the switching devices; a current detecting circuit for a current in the windings and the switching device; a current limit circuit keeping an average of the current within a predetermined range; a standard position learning device of the motor at a learning range such that the current limit circuit limits the current, and the motor rotates until the object stops at a limit position of a movable range; a shift range determination device; and an error determination device determining that the current detecting circuit or the current limit circuit malfunctions when the object does not reach the limit position, the shift range is in a non-learning range, and the standard position learning device starts to learn the standard position.

Description

technical field [0001] The present disclosure relates to a control device for controlling the operation of an electric motor and a shift-by-wire system having the same. Background technique [0002] Conventionally, in vehicle control technology, a drive-by-wire system that electrically controls an actuator of a vehicle state using a drive-by-wire circuit according to an instruction of a vehicle driver is known. For example, Patent Document 1 teaches a shift-by-wire system that switches a gear shift lever according to a driver's instruction. In this system, the operation of an actuator having a brushless motor is controlled to change a shift position by rotatably driving a brake plate in a shift position switching device. [0003] In the shift-by-wire system according to Patent Document 1, based on the count value of the pulse signal output from the encoder for every predetermined angle in synchronization with the rotation of the motor, by rotating the motor to a target rota...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/00H02H7/08G06N20/00
CPCF16H2061/1208G06N20/00F16H61/12
Inventor 吉田和弘
Owner DENSO CORP
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