会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 112. 发明专利
    • MOTOR CONTROL CIRCUIT
    • JPH0723577A
    • 1995-01-24
    • JP1131793
    • 1993-01-27
    • NEC CORP
    • MATSUI TOMOJI
    • G11B19/22H02H7/093H02P3/06H02P3/10H02P3/20H02P6/24H02P29/00H02P5/00
    • PURPOSE:To prevent reverse runaway caused when a motor is stopped abruptly by applying forward rotation reverse torque and drop of the rotational speed thereof to a predetermined value can not be detected. CONSTITUTION:A control section 1 delivers a drive current control signal C1 and a torque applying direction control signal C2 to a motor drive section 2 and controls the driving of a motor 3. A rotation drop detecting section 5 receives a rotational pulse P1 from a rotational pulse generating section 4 and detects drop of the rotational speed to a predetermined level thus producing a rotation drop detection pulse P2. A timer section 6 is actuated upon receiving a rotation stop signal S1 and outputs a pulse S3 upon elapse of the time required for maximum rotation stop of motor. A control section 1 delivers a signal designating the application of forward rotation reverse torque to the motor drive section 2 upon receiving an external rotation stop signal S1 and eventually delivers a signal designating the stoppage of application of forward rotation reverse torque upon receiving a rotation drop detection pulse P2 or P3.
    • 114. 发明专利
    • BRAKE CONTROL CIRCUIT FOR MOTOR
    • JPH06276785A
    • 1994-09-30
    • JP8511093
    • 1993-03-22
    • NIHON DENSAN KK
    • OKADA TADASHIINUI AKIRA
    • H02P3/04H02P3/06H02P6/24H02P6/02
    • PURPOSE:To apply a brake stably independently of the rated number of rotations and the like. CONSTITUTION:A rotation-speed detecting circuit 1, which detects the rotation speed of a rotor, a speed-reduction detecting circuit 2, which detects the fact that the number of rotations becomes the specified value or less with respect to the rated number of rotations, a rotation-direction detecting circuit 5, which detects the rotation direction of the rotor, and a current control circuit 4, which controls the current conduction into a driving coil, are provided. A brake is operated with a brake current at a setting 1 (a). When the fact that the number of rotations becomes the specified value or less with respect to the rated number of rotation is detected with the speed reduction detecting circuit, the brake is operated at a setting 2 (b) of the braking current, which is smaller than the setting 1 (a). When the reverse rotation of the rotor is detected with the rotation detecting circuit, controlling is performed so as to stop the current conduction in to the driving coil.
    • 117. 发明专利
    • POWER WINDOW DRIVE CONTROLLER
    • JPH06225560A
    • 1994-08-12
    • JP1143193
    • 1993-01-27
    • TOKAI RIKA CO LTD
    • NISHIBE TAIJI
    • B60J1/17H02P3/06
    • PURPOSE:To provide a power window drive controller which can prevent window glass from stopping in the condition that foreign matter is caught at manual close. CONSTITUTION:If the output of a signal to close window is stopped from an operation switch 100, a catch prevention judging means 104 judges the existence of the necessity of catch preventive processing, for a certain period after that, according to the signal for catch detection from a signal output means 102. While this judgment is performed, a control means 106 continues the rotation control in close direction of a motor 108, and in case that a catch processing command signal is inputted from the catch prevention judging means 104 during the continuity of rotation control in close direction of this motor 108, the control means 106 rotates the motor 108 in the direction of open after stop. Hereby, even if the output of the close command signal is stopped from the operation switch 100 during the close operation of window glass, if it is judged that catch prevention processing is necessary, the window glass shifts to open after stoppage.