Title:
MOTOR STARTER CIRCUIT
Document Type and Number:
Japanese Patent JP3244608
Kind Code:
B2
Abstract:
PURPOSE: To suppress time lag fluctuation due to mechanical backlash before actual start of the operation of an object to be driven when rotation of a motor is started.
CONSTITUTION: The motor starter circuit comprises a polarity inversion detecting circuit 10 for storing two switches 1, 2 in respective drive directions and a switch being turned ON last and making a decision whether the switch coincides with a switch currently turned ON, a timer circuit 7 for delivering a signal upon elapse of a predetermined time after turn ON of any one switch and applying a normal drive voltage when coincidence of switches is detected, and motor drive voltage selection circuits 11-24 for applying a start voltage higher than the normal drive voltage until a signal is delivered from the timer circuit when coincidence of switch is not detected and applying the normal drive voltage until the switch currently turned ON is turned OFF after a signal is delivered from the timer circuit.
Inventors:
Masao Muto
Yoshimoto Masahiro
Hiroyuki Bamba
Yasuo Nakagawa
Yu Ishibashi
Yoshimoto Masahiro
Hiroyuki Bamba
Yasuo Nakagawa
Yu Ishibashi
Application Number:
JP1898695A
Publication Date:
January 07, 2002
Filing Date:
February 07, 1995
Export Citation:
Assignee:
JEOL Ltd.
International Classes:
H01J37/20; H02P1/18; (IPC1-7): H02P1/18; H01J37/20
Domestic Patent References:
| JP62163584A | ||||
| JP271311A | ||||
| JP293711A | ||||
| JP63308613A | ||||
| JP1228005A | ||||
| JP61289409A |
Attorney, Agent or Firm:
Hiroshi Nirazawa (7 outside)
Previous Patent: Beam-column connection nodes suitable for steel and concrete structures
Next Patent: PRODUCTION OF ANTHRONE
Next Patent: PRODUCTION OF ANTHRONE