Title:
CONTROL DEVICE OF MOTOR-DRIVEN POWER STEERING DEVICE
Document Type and Number:
Japanese Patent JP3945078
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To automatically and efficiently adjust an electric current detecting signal by arranging a switching means for inputting and supplying the electric current detecting signal of a motor to a control part, performing PWM driving on the switching means by the control part, and adjusting gain of the electric current detecting signal by changing a duty.
SOLUTION: An electronic switch 40 is arranged as a switching means between an MCU 50 and an electric current detecting circuit 38 for detecting an electric current flowing to a motor 20 for generating steering assisting force, and a motor detecting current (i) is inputted to an A/D terminal of the MCU 50 through a smoothing (leveling) circuit of fixed resistances R1, R2 and a capacitor C. A multiplier (a time sharing multiplying circuit) is formed by controlling the electronic switch 40 in an ON/OFF system on the basis of a duty of a PWM signal from a PWM terminal of the MCU 50, and an output level Vout of the multiplier is adjusted by changing a duty Duty of the PWM signal. An output level Vout of this multiplier is inputted to the A/D terminal of the MCU 50 through the smoothing circuit.
Inventors:
Hideaki Kawada
Application Number:
JP21154299A
Publication Date:
July 18, 2007
Filing Date:
July 27, 1999
Export Citation:
Assignee:
Nippon Seiko Co., Ltd.
International Classes:
B62D6/00; B62D5/04; B62D137/00; (IPC1-7): B62D6/00; B62D5/04; //B62D137:00
Domestic Patent References:
| JP10004676A | ||||
| JP10215569A | ||||
| JP11041925A | ||||
| JP10327576A |
Foreign References:
| WO1999000287A1 |
Attorney, Agent or Firm:
Yuzo Agata
Masaru Murayama
Masaru Murayama
Previous Patent: MOUNTING FRAME FOR WIRING ACCESSORY
Next Patent: SECONDARY AIR SUPPLY DEVICE FOR SOHC ENGINE
Next Patent: SECONDARY AIR SUPPLY DEVICE FOR SOHC ENGINE