CONTROLLING DEVICE FOR DRIVE OF MOTOR

• Main Author: NISHIBE TAIJI
• Format: Patent
• Language: English
• Published: 15.07.1994
• Edition: 5
• Subjects: CHECKS FOR WINGS; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; FIXED CONSTRUCTIONS; GENERATION; KEYS; LOCKS; PERFORMING OPERATIONS; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FORVEHICLES; SAFES; TRANSPORTING; VEHICLES IN GENERAL; WINDOW OR DOOR FITTINGS; WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILARDEVICES FOR VEHICLES; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THEFUNCTIONING OF THE WING

PURPOSE:To prevent the continuation of the overload state of a motor irrespective of the temperature of the motor, whether low or high in temperature. CONSTITUTION:Since the resistance value R0 of a thermister 70 becomes lower at a room or high temperature and higher at a low temperature, the potential V2 at the thermister 70 changes at the same variation as that of a motor driving current. In the case the temperature becomes lower than a prescribed temperature (-10 deg.C to -20 deg.C) when the potential V2 changes, the potential V1 corresponding to the motor driving current abruptly changes. This is because of that the resisting force of door glass 20 increases when the glass 20 moves due to the malfunction of a window regulator or the hardness change of weather strips made of rubber in a door frame at a low temperature (about -10 deg.C to -20 deg.C), since the glass 20 is constituted in such a way that the glass 20 is raised or lowered by the mechanical drive of the window regulator while the peripheral edge of the door glass 20 is held between the weather strips. The potential V2 is also abruptly changed in accordance with the abrupt change of the motor driving current.