Power seat system for sensing motor reverse rotation and method thereof

Patent metadata

Field	Value
Publication number	US-10840837-B2
Application number	US-201816223618-A
Country	US
Kind code	B2
Filing date	Dec 18, 2018
Priority date	Jul 19, 2016
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A power seat system includes: a motor that changes a position of a power seat by performing a rotational operation; a Hall sensor that senses a change in Hall voltage according to the rotation of the motor and outputs a pulse signal; and a motor reverse rotation detection unit that monitors outputs from the motor and the Hall sensor, and detects an occurrence of a reverse pulse according to a motor reverse rotation when a motor current overshooting section and a change in pulse signal value are simultaneously detected in accordance with stop of the motor.

First claim

The invention claimed is:

1. A power seat system comprising: a motor that changes a position of a power seat by performing a rotational operation; a Hall sensor that senses a change in Hall voltage according to a rotation of the motor and outputs a pulse signal; a motor reverse rotation detection unit that monitors outputs from the motor and the Hall sensor, and detects an occurrence of a reverse pulse according to a motor reverse rotation when a motor current overshooting interval and a change in pulse signal value are simultaneously detected in accordance with stoppage of the motor; and a motor control unit that decreases a motor position upon being notified, by the motor reverse rotation detection unit, of the occurrence of the reverse pulse according to the motor reverse rotation, wherein the motor control unit increases the motor position each time the pulse signal value is changed but no motor current overshooting interval is detected, and the motor control unit maintains a previously calculated motor position when the motor current overshooting interval according to the stoppage of the motor is detected but no change in pulse signal value is detected.

2. The power seat system according to claim 1 , wherein the motor control unit further controls a rotation direction and a rotational speed of the motor to move the position of the power seat.

3. A method of detecting a motor reverse rotation in a power seat system having a motor and a Hall sensor that senses a change in Hall voltage according to a rotation of the motor and outputs a pulse signal, the method comprising: monitoring outputs from the motor and the Hall sensor; detecting an occurrence of a reverse pulse according to a motor reverse rotation when a motor current overshooting-interval and a change in pulse signal value are simultaneously detected in accordance with stoppage of the motor; decreasing a motor position when the occurrence of the reverse pulse according to the motor reverse rotation is detected; increasing the motor position each time the pulse signal value is changed but no motor current overshooting interval is detected; and maintaining a previously calculated motor position when the motor current overshooting interval according to the stoppage of the motor is detected but no change in pulse signal value is detected.

Assignees

• Hyundai Dymos Inc

Inventors

• Lee Ho Cheoul
• Byun Deuk Kyu
• Lee Jin Woo
• Kim Min Jin

Classifications

• B60N2/0244

  with logic circuits · CPC title

• B60N2210/14

  Inductive; Magnetic field · CPC title

• B60N2/02

  the seat or part thereof being movable, e.g. adjustable (adjustable arm-rests B60N2/75; adjustable head-rests B60N2/806) · CPC title

• H02P29/0241

  the fault being an overvoltage · CPC title

• B60N2/06

  slidable (B60N2/12 {, B60N2/2209} take precedence) · CPC title