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| Number | Title | Issue Date |
| 7548036 | DC motor mechanical shock protection system A DC motor mechanical shock protection system monitors the motor current to determine the torque the motor is applying to the gearbox, and takes mitigating action if the torque approaches a level that can damage the driven device and/or the drive system. This protec... | 06/16/2009 |
| 7405528 | Global closed loop control system with DV/DT control and EMI/switching loss reduction A motor drive system control provides global closed loop feedback to cooperatively operate system components to adaptively reduce noise and provide noise cancellation feedback. An active EMI filter reduces differential and common mode noise on an input and provides ... | 07/29/2008 |
| 7394215 | Thermal control variable-speed circuit without switching noise A thermal control variable-speed circuit without switching noise is connected with a driving circuit, which controls the rotation speed of a fan motor using a driving voltage. The thermal control variable-speed circuit includes a reference voltage output circuit and... | 07/01/2008 |
| 7330007 | Object detecting apparatus An object detecting apparatus includes a piezoelectric sensor provided at an edge portion of an opening/closing body for emitting an output voltage which changes corresponding to an external force applied to the edge portion and a detection circuit for receiving the... | 02/12/2008 |
| 7250736 | Opening and closing member control system A motor drives a window glass of a door of a vehicle in an opening direction and a closing direction. A rotation sensing device outputs a pulse signal in response to rotation of the motor. A controller senses pinching of an object by the window glass based on the ro... | 07/31/2007 |
| 7145743 | Apparatus and method for unlatching a head within a data storage device For unlatching a head within a data storage device, such as a HDD (hard disc drive), a VCM (voice coil motor) amplifier with a switch is used for applying at least one cycle of an acceleration current pulse to a voice coil motor (VCM) for unlatching the head during ... | 12/05/2006 |
| 7061195 | Global closed loop control system with dv/dt control and EMI/switching loss reduction A motor drive system control provides global closed loop feedback to cooperatively operate system components to adaptively reduce noise and provide noise cancellation feedback. An active EMI filter reduces differential and common mode noise on an input and provides ... | 06/13/2006 |
| 7009355 | Wiper control system for a vehicle and a method thereof A wiper control system is provided which comprises a rain droplet detector, a multiplexer, a count register, and a wiper control unit. The rain droplet detector has a plurality of switches that are configured to be electrically connected by rain droplets, and each s... | 03/07/2006 |
| 6956303 | Electronic control device for controlling electric units of motor vehicle doors which have different equipment An electronic control device for controlling electric units of motor vehicle doors which have different equipment. The control device is formed by at least one printed circuit board, including electronic components which are arranged in a housing and can be contacte... | 10/18/2005 |
| 6952087 | Method for controlling an adjustment process of a part In the method of controlling a process for moving a part (20) by an electric motor (12) against an end stop, pinching events are detected by monitoring a motor operating variable, such as a motor rpm, and if pinching is detected the motor (12) i... | 10/04/2005 |
| 6924614 | Opening and closing control device for opening and closing member of vehicle An opening and closing device for an opening and closing member of a vehicle includes a driving motor, a feedback control unit for controlling an output duty to the driving motor so that a preset target speed of the driving motor can be achieved, a high-pass filter ... | 08/02/2005 |
| 6870339 | Method for operating an electrical drive unit The invention relates to a simple, economical and reliable method for providing anti-jamming protection. According to said method, the excess force—the difference between the driving force and the friction force—is compared with a trigger threshold. To this end,... | 03/22/2005 |
| 6765631 | Vehicle windshield rain sensor A rain sensor includes an amplifier circuit that amplifies an output voltage from a photodiode and then provides this voltage signal to a CPU. The amplifier circuit conducts an offset amplification. The output voltage from the amplifier circuit is controlled to be a... | 07/20/2004 |
| 6650076 | Current profile method and apparatus for controlling gate operation A method and apparatus for moving a gate a distance in a predetermined period of time. In one embodiment the current load for an electric motor to move a gate is first measured to determine whether the gate's motion is being hindered or helped. A micropro... | 11/18/2003 |
| 6611125 | Method for calculating inertia moment and driver for electric motor An electric motor is rotated at a velocity ω1. After that, during Ɗt12 seconds, the 1st acceleration is executed at a rate (ω2 -ω1)/Ɗt12. During this acceleration, the torque ͌m is ca... | 08/26/2003 |
| 6605920 | Method and apparatus for large motor control Apparatus and method for providing digital signal processing method for controlling the speed and phase of a motor involves inputting a reference signal having a frequency and relative phase indicative of a time based signal; modifying the reference signa... | 08/12/2003 |
| 6580241 | Method of detecting pinching of object in power window device In a power window device an MCU detects motor torque values one by one when a window is opened and closed, compares the detected motor torque values with base values set to the travel regions and stops or reverses a motor determining that an object is pin... | 06/17/2003 |
| 6437528 | Method for standardizing the pane position of a vehicle window lifter actuated by external force The invention relates to a method for standardizing the pane position of an external force actuated vehicle window lifter wherein the window pane is moved by means of the drive of the window lifter into a closed position provided with a seal and this clos... | 08/20/2002 |
| 6388410 | Apparatus and method for monitoring a closed-off interior space of a motor vehicle An apparatus invention relates to an apparatus and method for monitoring an interior space which is closed off by a locked and/or manually non-unlockable door, flap, sliding sunroof or the like, for example a passenger compartment or luggage compartment o... | 05/14/2002 |
| 6291960 | Pulse width modulated motor control system and method for reducing noise vibration and harshness An apparatus for reducing motor noise in a motor driven system (12) has a sensor (22) coupled to the system that generates an electrical signal indicative of a system operating parameter. A controller (24) is coupled to the motor (14) and the sensor (22).... | 09/18/2001 |
| 6081080 | Method and apparatus for reducing voltage stresses in electric machines A method and apparatus for reducing winding failures in electric machines resulting from the application of high frequency or high dV/dt voltage pulses or voltage signals to the phase windings of the machine in which an inductive element is provided betwe... | 06/27/2000 |
| 6081085 | Power window apparatus A power window apparatus for a vehicle, which has an emergency switch being capable of cutting off a power-window-closing control switch element conjointly with the operation of a switch for opening the power window and has a contactor sliding between nor... | 06/27/2000 |
| 5977732 | Apparatus and method for determining presence or absence of foreign object or the like caught in power-open-and-closure mechanism Disclosed are apparatus and method for determining whether a foreign object or the like is caught in an open-and-closure mechanism such as a power window of an automotive vehicle. An external disturbance torque T imposed on a the open-and-closure mechanis... | 11/02/1999 |
| 5757156 | Opening/closing device for automobile door An opening/closing device for an automobile door comprising a speed sensor for detecting a moving speed of a door, a motor for applying an opening/closing assisting force to the door, and a control unit for controlling the driving of the motor, is provide... | 05/26/1998 |
| 5600219 | Sensorless closed-loop actuator unlatch A first method for detecting movement of an actuator includes supplying a demand current to a voice coil motor of the actuator (A1), sampling a voice coil motor voltage (B1), performing a slope detection of a voice coil motor voltage... | 02/04/1997 |
| 5202610 | Method and apparatus for yarn end-down detection in a textile yarn winding machine Method and apparatus for detecting breakage in a yarn strand being wound onto a yarn support member rotatably driven by a DC motor and having a closed-loop motor control system for maintaining a desired velocity of the motor and for signaling commutation ... | 04/13/1993 |
| 4701684 | Door or gate obstruction control An obstruction sensing and control arrangement for door or gate opening-closing mechanisms. The arrangement compares the operating rate of change of a predetermined characteristic with a preset rate of change and stops or reverses the motor in the opening... | 10/20/1987 |
| 4675586 | Monitoring circuit for a door operating D.C. electric motor A monitoring circuit for a door operating D.C. electric motor, the circuit comprises a first means for detecting a back EMF of the motor and producing a load signal indicative of the magnitude of the back EMF, a second means for detecting the time rate of... | 06/23/1987 |
| 4274040 | Solenoid torquer system A solenoid torquer system with flux rate feed-back. The system includes a torquer coil and an associated core, and a device adapted to drive a current through the coil having an amplitude proportional to the difference between a coil current command signa... | 06/16/1981 |
