Title:
STEERING CONTROL DEVICE OF FORK LIFT
Document Type and Number:
Japanese Patent JP3864296
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the continuous vibration of a steering motor in stationary steering by outputting a current command value for reversely rotating the motor on the basis of the electromotive voltage generated between armatures to the motor, and steering the current command value to zero value for a prescribed time when the handle operating angle speed is zero value.
SOLUTION: A controller 21 comprises an arithmetic part 24, a judgment part 45, a signal generation part 46, and a voltage detector 47. The arithmetic part 24 calculates an arithmetic value V1 according to the handle operating angle speed θhd from a handle operating angle speed detector 41. On the basis of the differential value between the voltages C1 and C2 of the armature terminals A, B of a motor 15, or the electromotive voltage value of the motor 15, an arithmetic value V2 according to the rotating speed and rotating angle speed of the motor 15 is calculated. The judgment part 45 calculates an arithmetic value V3 on the basis of the arithmetic values V1, V2 and the vehicle speed V from a speed detector 60 and outputs it to the signal generation part 46.
Inventors:
Youichi Fujita
Minoru Nakamura
Minoru Nakamura
Application Number:
JP18112199A
Publication Date:
December 27, 2006
Filing Date:
June 28, 1999
Export Citation:
Assignee:
Komatsu Forklift Co., Ltd.
International Classes:
B62D6/00; B62D5/04; B66F9/24; H02P1/22; H02P3/08; B62D113/00; B62D117/00; (IPC1-7): B62D6/00; B62D5/04; B66F9/24; H02P1/22; H02P3/08; //B62D113:00; B62D117:00
Domestic Patent References:
| JP687455A | ||||
| JP971250A | ||||
| JP11115778A | ||||
| JP200118813A |
Attorney, Agent or Firm:
Takahisa Kimura
Yoshiyuki Obata
Yoshiyuki Obata