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| Number | Title | Issue Date |
| 8432118 | Inverter and a method for controlling an electric machine An inverter comprises output switches for generating motor phase currents for application to an electrical motor based on a commanded torque. A current sensor is arranged for detecting motor phase currents applied to the electrical motor by an inverter. A voltage se... | 04/30/2013 |
| 8198849 | Method and device for protection against jamming in a motor-driven locking system The present invention relates to a method for protection against jamming in a motor-driven locking system and a device for the execution of the method. ... | 06/12/2012 |
| 8089237 | Method for controlling an opening leaf of a vehicle with an anti-trap function A method for controlling an opening leaf of a vehicle. The method detects whether a predetermined event is occurring in the absence of a predetermined situation likenable to a trapping incident and, if appropriate, lowers a function of detecting the situation likena... | 01/03/2012 |
| 7394216 | Automatic anti-trap device An automatic anti-trap device is provided to add safety to other apparatuses. The automatic anti-trap device of this invention has a driving circuit to control a motor, a current sensor to generate a current signal, a current ripple peak value circuit to generate a ... | 07/01/2008 |
| 7275445 | Modular pressure sensor drive connectable to a computer The modular measuring drive system can include a housing having a cavity and being sized and shaped to fit within a disk drive bay of a computer and a measuring device, disposed within the cavity of the housing, for providing a measurement value to the computer. The... | 10/02/2007 |
| 7199963 | Method of performing self-servo write using a helium environment Methods of performing self-servo write using a helium environment are provided. In one embodiment, a recording disk is placed in an enclosure. The enclosure is filled with a gas that is substantially helium. Self-servo write is used to write circular track positioni... | 04/03/2007 |
| 7196486 | Apparatus for detecting obstacle to power regulated window An apparatus for detecting an obstacle to a power regulated window, which can detect existence of an obstacle by a method of differential current at low rotating speed of a motor and reduce a force of biting an obstacle and prevent from detecting an obstacle unexpec... | 03/27/2007 |
| 7187151 | Conveyor unit, controller for a driving roller for use in the conveyor unit, and zone controlled conveyor system incorporating the conveyor unit A conveyor unit (2) including a driving roller (5), a motor (30) for powering the driving roller (5), and a controller (10) adapted to adjust the motor (30) so as to control the driving roller (5), the motor (30 | 03/06/2007 |
| 7163381 | Pump and method of pump control A pump includes a motor and a motor control in operative connection with the motor. The motor control provides energy input to the motor to drive the motor and receives feedback from the motor of motor function. The motor control includes a motor control protocol th... | 01/16/2007 |
| 6840113 | Pinch detection system A pinch detection system and method controls the speed of a motor moving an object by first calculating the actual motor force and then comparing the actual motor force with a reference force value in a reference field. A pinch condition is indicated if the differen... | 01/11/2005 |
| 6657409 | Control system and method for an automatic door or gate A control system for a door or gate which is movable between an open position and a closed position by an automated operator, comprising a door travel organizer which divides the door travel into a plurality of segments and each segment into a plurality o... | 12/02/2003 |
| 6593713 | Control apparatus for hybrid vehicle A control apparatus utilizes an electric motor to initially start-up an engine. In an engine restart under certain conditions, the control apparatus sets a motor output value for the electric motor to a value exceeding the rated performance. Thus, when st... | 07/15/2003 |
| 6448728 | Electric power steering apparatus The controller possesses a reference torque signal setting unit which generates a reference signal which becomes high when the detected signal becomes high based on at least the signal detected from the steering torque sensor; a correction torque signal s... | 09/10/2002 |
| 6437530 | Method for electronic surveillance and control of the opening and closing procedure for electrically operated units A method for the electronic monitoring and control of the opening and closing operation of electrically operated aggregates, particularly of window lifters and sunroofs in motor vehicles, is described. A regulating unit of the aggregate is connected to a ... | 08/20/2002 |
| 6329779 | Obstacle detection method for a motor-driven panel An improved method of detecting the presence of an obstacle in the path of a motor-driven panel by computing the slope of a measured motor speed signal in a way that cancels the effect of periodic undulation of the speed signal, and comparing the computed... | 12/11/2001 |
| 6194855 | Variable drive with protection against jamming for movable parts In a displacement drive that provides an obstruction prevention function for movable parts, in particular such as windows and sunroofs in motor vehicles, a decrease in the rotation speed or velocity of the drive is provided in order to achieve a predefine... | 02/27/2001 |
| 6177777 | Actuation and control method and device, particularly for synchronous permanent-magnet motors The method and the corresponding device allow to start a synchronous motor with the chosen rotation direction, with a very high static torque, without requiring any modification of the structure of the synchronous motors currently in use, by means of an a... | 01/23/2001 |
| 6150784 | Method of detecting foreign matter caught by window in power window device In a method of detecting a foreign matter caught by a window in a power window device which includes a window opening/closing motor, a motor drive unit, a pulse generator for generating pulses corresponding to the rotation of the motor, an MCU for executi... | 11/21/2000 |
| 6144178 | Disk drive with controlled reduced internal pressure A rigid magnetic recording disk drive includes a vacuum pump attached to the disk drive housing for removing air from within the housing so that the disk drive is operated at a reduced internal gas pressure. The pump motor is controlled by control circuit... | 11/07/2000 |
| 6064165 | Power window or panel controller A controller for energizing a power-operable element, such as a sunroof, window, door, vehicle seat, a component of a major appliance or of a machine or of a conveyor system. The disclosed controller senses both hard and soft obstructions and de-activates... | 05/16/2000 |
| 5994858 | Method and apparatus for detecting obstruction to powered window movement An obstruction detecting method for use with a power window device comprising a motor activated to open and close a window by means of a window drive mechanism, a motor drive unit for driving the motor, a pulse generator for generating pulses correspondin... | 11/30/1999 |
| 5925995 | Electric power steering apparatus In an electric power steering apparatus, it is judged whether or not a value of primary delay of temperature increase in a driving circuit for an electric motor tends to decrease, and when the value of primary delay is judged to tend to decrease, a new va... | 07/20/1999 |
| 5563482 | Power tools A drill/driver (eg. an electric drill) with a screwdriver attachment, and a method of controlling the drill/driver, are described. A control circuit (30) controls the speed of rotation of the motor (38, 39) through a time delay circuit (42) and a triac (4... | 10/08/1996 |
| 5530329 | Drive control device for opening/closing member A drive control device for an opening and closing member is active to optimally adjust a threshold level for pinch detection. Utilizing a speed sensor or the like, the closing speed of the opening/closing member is detected. The value of the closing speed... | 06/25/1996 |
| 5453669 | Motor current detection circuit A motor current detection circuit in which a level for detecting an overload state is varied when motor drive voltage varies so as to prevent erroneous detection due to variation in-motor current which occurs when the drive voltage varies.... | 09/26/1995 |
| 5061885 | Power screwdriver An apparatus detects stoppage of a motor of a power driven screwdriver due to the excess load. After detecting stoppage, power to the motor is increased gradually to a predetermined value to firmly tighten the screw. The time of increase of power is deter... | 10/29/1991 |
| 4981096 | Electronically controlled sewing machine An electronically controlled sewing machine, comprises a current detecting device for detecting a value of current flowing through a stepping motor that drives a machine part and current setting means for setting a value of current to be applied to the st... | 01/01/1991 |
| 4953053 | Method and apparatus for detecting mechanical overload of a hoist A hoist for raising and lowering objects with an apparatus for detecting mechanical overload of the hoist. The system provides a hoist having an alternating current motor connected to an alternating current power supply. The level of current of the power ... | 08/28/1990 |
| 4945298 | Motor driving apparatus A motor driving apparatus includes a motor, a signal generating device for generating a Pulse Width Modulation binary signal, a control device for applying a current to the motor, a current detecting device for detecting the current applied to the motor, ... | 07/31/1990 |
| 4833377 | Current leakage reduction circuit An offset current which is 180° out of phase with the leakage current for a motorized bed circuit is created through the use of an additional transformer winding and series resistor which is connected between the neutral conductor and ground conductor. A... | 05/23/1989 |
| 4504881 | Protective circuit for an electric motor A protective circuit for an electric motor comprises a frequency signal generating circuit for generating a frequency signal in accordance with the rotational speed of the motor, a switching circuit switched over to either permit or cut off supply of curr... | 03/12/1985 |
| 4490656 | Overload protection in a motor control system A microcomputer-based motor control system provides overload protection by incrementing a register whenever a full power condition exists and decrementing the register when less than a full power condition exists. When the register reaches a predetermined... | 12/25/1984 |
| 4412162 | Protective system for automatic tool changing apparatus There is disclosed a protective system for preventing damages to a tool and a work or tool changing mechanism component parts due to any interference between the tool and the work during the tool changing operation by an automatic tool changing apparatus ... | 10/25/1983 |
| 4394607 | Control systems for gates and the like including a motor overload monitoring circuit A control system for operating a bidirectional gate driven by a reversible electric motor includes an overload protection circuit to prevent motor current overload produced by gate obstructions and the like. The system includes control switches for operat... | 07/19/1983 |
| 4388575 | Arrangement for controlling elements of power vehicle such as safety belt, window pane and the like An arrangement for controlling an element of a power vehicle, such as a safety belt, window pane, and the like, has a displaceable member connectable with a power vehicle element to be controlled and displaceable together with the latter from a first end ... | 06/14/1983 |
| 4322668 | Power control of a stalling motor A control system, for a motor which may be subjected to stalling loads, provides a non-linear increase in motor current during stalling conditions to maintain rated horsepower. When the maximum transient overload current is reached, this current is mainta... | 03/30/1982 |
| 4290000 | Power amplifier with current limiter circuit A power amplifier is disclosed for controlling the current flow through a load, such as a d-c servo motor. The amplifier includes a plurality of switching elements connected in bridge fashion with the load and a predetermined power source for coupling the... | 09/15/1981 |
| 4249117 | Anti-kickback power tool control An impending kickback condition in the operation of a power tool or machine tool system is sensed and used to control or eliminate the kickback. The ability to sense an impending kickback condition can be used in all categories of power driven tools. The ... | 02/03/1981 |
| 4220900 | Motor control system for a linearly reciprocating load device such as automotive vehicle closure including sun roof A system is provided to control a load responsive to a maximum load condition to disable the load when the maximum load condition exists, the control being altered first to provide a period of non-response during load start up and secondly to provide temp... | 09/02/1980 |
| 4207503 | Battery supplied motor current control system with safety circuit A controlled switch 4 provides current pulses derived from a battery 3 to a motor 1, having a series field 2 under command of a control unit 8 which provides command pulses for repetitive closing of the controlled switch 4. Current through the motor is se... | 06/10/1980 |
