Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 8143833 | Processing unit The invention relates to a processing unit of a measuring signal related to conditions of an object controlled by power electronics. The processing unit comprises an interface with digital terminals, wherein the interface is provided with at least one terminal for a... | 03/27/2012 |
| 7880418 | Electromechanical drive system, in particular for progressive cavity pumps for oil wells The following invention is an electromechanical system (1) that is to be connected to an electricity supply (7), comprising: an electric machine (2) that can operate as an independent generator with a rotating ... | 02/01/2011 |
| 7834572 | Robust blower motor startup technique A method for starting a blower motor with a locked rotor condition, the motor having one or more speed settings, each speed setting having a reference voltage and reference current value associated therewith, the method comprising, from a motor off condition, applyi... | 11/16/2010 |
| 7622874 | Over current detection circuits for motor driver A motor driver includes an H-bridge having a first differential input, a second differential input, and a differential output; a sensing circuit coupled to the differential output of the H-bridge; a comparison and logic circuit coupled to the sensing circuit; a pair... | 11/24/2009 |
| 7427842 | Series motor and method of controlling the same A circuit for a series motor for a power tool is disclosed, wherein reliable switching is achieved by means of two electronic switches, without the use of a mechanically disconnecting switch. To this end, two electronic switches, preferably triacs, are preferably co... | 09/23/2008 |
| 7339414 | Method and circuit arrangement for monitoring the mode of operation of one or more load circuits, especially of a domestic appliance The invention relates to a method and a circuit arrangement for monitoring the mode of operation of one or more load circuits, especially of a domestic appliance, which contains a controlled semiconductor switch, such as a triac, and an electric consumer. Said switc... | 03/04/2008 |
| 7282881 | Power fold mirror control circuit and method A circuit and method of reducing the occurrence of overheating of a power fold vehicle mirror. The circuit controls the operation of the power fold mirror such that when a portion of the circuit reaches or exceeds a predetermined temperature threshold, the vehicle m... | 10/16/2007 |
| 7253581 | Data storage device, motor control device, and motor control method Embodiments of the invention provide a way to accurately detect the position of a spindle motor. In a spindle motor startup process according to one embodiment, a parameter setup section acquires from a parameter table a sense time value corresponding to an input vo... | 08/07/2007 |
| 7217103 | Gaseous fluid compressor control system A system for optimizing compressor output flow when a maximum power consumption limit exists and the compressor inlet pressure can vary. Utilizing the invention the maximum compressor output flow can be obtained even while the inlet pressure to the compressor varies... | 05/15/2007 |
| 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 |
| 7183732 | Motorized barrier operator system for controlling a stopped, partially open barrier and related methods A motorized barrier operator that moves a barrier between limit positions, includes a motor for moving the barrier between set limit positions. When the barrier is in a stopped, partially open position the operator implements at least a hybrid control sequence that ... | 02/27/2007 |
| 7170254 | Stepper motor driving apparatus A stepper motor driving apparatus, includes a stepper motor; a driven member interlocked with a rotation of a rotor of the stepper motor, a stopper stopping the driven member in a zero position, a controller controlling the excitation state of an excitation coil of ... | 01/30/2007 |
| 7170253 | Automotive door latch control by motor current monitoring Latch control methods and systems are disclosed, including a latch that receives power from a motor associated with a latch. A sensor can be provided for monitoring the current consumption of the motor. A microcontroller can control the latch and/or the motor, based... | 01/30/2007 |
| 7136733 | Fault detection in an electric power-assisted steering system A method and system for detecting faults in an electric power-assisted steering system includes determining a voltage vector of an electric power-assisted steering motor and measuring a current vector of the motor. Acceptable angular relationships are defined betwee... | 11/14/2006 |
| 7092585 | Method and apparatus for processing both static and moving images An image processing apparatus which is capable of displaying moving images with more actions for longer period of time. The apparatus is equipped with: an image data ROM 6 which stores a plurality of static image information and moving image information that ... | 08/15/2006 |
| 7088069 | Load monitoring method for motor-driven injection molding machine Load of each motor-driven drive section of an injection molding machine is monitored in order to obtain an average load level of the drive section for each molding cycle. A cycle extending time or a cycle shortening time necessary for decreasing or increasing the av... | 08/08/2006 |
| 7038415 | Motor driving device A temperature sensor (33) detects the temperature of a MOS transistor (7), and a current detecting circuit (35) detects current flowing in the MOS transistor (7). When the voltage corresponding to the detected temperature or the voltage c... | 05/02/2006 |
| 7002318 | Position sensor fault tolerant control for automotive propulsion system A control system for a motor including a rotor comprises a sensorless sensor module that includes a saliency-based estimator module that generates a first rotor position signal based on saliency and a back electromotive force (emf) estimator module that generates a ... | 02/21/2006 |
| 6989641 | Methods and apparatus for fault-tolerant control of electric machines A method for controlling an electric machine having current sensors for less than every phase of the electric machine includes operating a processor to perform a test to preliminarily determine whether a fault exists in one or more of the current sensors and a test ... | 01/24/2006 |
| 6949908 | Fault-tolerant electric motor control system The present invention offers a novel control system for a multiphase motor. The control system involves energization circuitry for energizing each phase winding, and a control circuit for defining phase currents for individual phases of the motor to generate control... | 09/27/2005 |
| 6919704 | Reverse battery protection for a trolling motor A trolling motor having reverse battery protection such that an inadvertent reversal of the battery leads, as when connecting the trolling motor to a battery, will not cause unwanted operation of the trolling motor or damage to the trolling motor circuitry. The reve... | 07/19/2005 |
| 6917174 | Cost-effective measurement of large machine currents The increasing use of electrically powered vehicles has created a need for inexpensively and effectively measuring high currents for motor control, as for example digital motor control. Because the high operating voltages of traction motors, the motor current sensor... | 07/12/2005 |
| 6906487 | Anti-pinch window drive circuit An antipinch circuit prevents the motor driven closure of an automotive window if a soft obstacle is compressed between the window and the top of the door frame, and the window is opened in response to the sensing of the obstacle. The circuit measures the motor torq... | 06/14/2005 |
| 6778367 | Method and device for detecting the blocking of a stepper motor The invention relates to a method of detecting the blocking of a three-phase stepper motor featuring three coils, characterised in that, with the stepper motor having its coils connected in star mode, with a common terminal (P), it implements a detection of a said b... | 08/17/2004 |
| 6696807 | Control apparatus of electric power steering A control apparatus of an electric power steering system has calculating means, controlling means, determining means suppressing means, canceling means. Calculating means calculates an assist current value that corresponds to the assist force based on ste... | 02/24/2004 |
| 6501241 | Current detector used in system of controlling motor for driving vehicle A current detector used in a control system for controlling a motor for driving a vehicle is disclosed, which does not require an especially accurate power circuit, and an accurate measurement result can be obtained by using a cheap power circuit whose ac... | 12/31/2002 |
| 6362583 | Control unit for a brushless motor and read/write device including such a control unit A control unit (1) according to the invention for controlling a brushless motor (5) includes position detection means (10) for generating a signal (S1) which is indicative of the position of the motor (5). The control unit (1) further includes supply mean... | 03/26/2002 |
| 6111380 | System for detecting abutment and blocking in a stepped motor A stop and jamming detection system in a stepping motor determines a parameter from the profile of an instantaneous motor variable and compares it to a reference value. A signal for the stop and jamming detection system is generated therefrom. Provided fo... | 08/29/2000 |
| 6111379 | Circuit configuration for driving an electrical drive unit The circuit configuration is used to drive an electrical drive unit. The circuit has a voltage source and a control circuit for voltage commutation connected between the voltage source and the electrical drive unit. In addition, the circuit includes a tem... | 08/29/2000 |
| 6054827 | Controller for motor-driven power steering A current flowing to a motor 8 for generating a steering assist force for a steering mechanism is detected by a motor current detecting circuit 24 to be inputted to a controller 10 as a motor current detection value IMS. The controller 10 arithmetically d... | 04/25/2000 |
| 6031348 | Automatic automotive power window system and method of controlling an automatic automotive power window system An automatic power window system (10) includes a motor module (12) and a controller (14) physically remotely located from the motor module. The motor module and the controller are coupled by a first signal link (16) and a second signal link (18). The firs... | 02/29/2000 |
| 6005361 | Method for controlling a direct current drive In a method of controlling a direct-current drive, in particular a directrrent door drive, two state variables of the direct-current drive are determined and, on the basis of these state variables, a load or resistance moment applied to the direct-curren... | 12/21/1999 |
| 5874816 | Method of preventing wire from becoming entangled in reinforcing bar fastening machine A method of preventing a wire from becoming entangled in a reinforcing bar fastening machine having a wire feed device for feeding a wire for fastening reinforcing bars, a guide arm for guiding the wire so as to wind around a crossing point of the reinfor... | 02/23/1999 |
| 5831406 | Electric servo-drive An electric servo-drive for adjusting a control element between an open position and a closed position. The tightness of the control element in the closed position can be assured without any additional tightening device. Starting signals are issued to the... | 11/03/1998 |
| 5828196 | Apparatus and method for controlling an electric motor A bypass circuit conducts electrical current around a motor starter to a current limiting switch assembly upon initiation of a flow of excessive electrical current to an electric motor to protect the motor starter against excessive current flow. Upon init... | 10/27/1998 |
| 5786674 | Hydraulic servo control particularly hydraulic power steering system for motor vehicles A hydraulic servo control, particularly a hydraulic power steering system for motor vehicles, has hydraulic pressure pump which is driven by an electric motor. The rotational speed of the electric motor is controlled as a function of the load, so that a h... | 07/28/1998 |
| 5754022 | Optical pickup moving mechanism An optical pickup is provided with a limiting wall spaced a predetermined distance apart from a screw shaft to limit the separation of an interlocking projection away from the screw shaft, so that the interlocking projection cannot be disengaged from the ... | 05/19/1998 |
| 5729104 | Power window apparatus for vehicle Attention is given to that, when a catch-in state occurs while a vehicle window glass is moved upward, a current flowing in a motor serving as a drive means for moving the vehicle window glass increases. In an apparatus for comparing a predetermined curre... | 03/17/1998 |
| 5653144 | Stress dissipation apparatus A rotatable apparatus includes a pair of rotatable members joined by a stress dissipating structure. The stress dissipating structure can be employed in a gear, sprocket, clutch or the like. In one embodiment of the present invention, antibuckling plates ... | 08/05/1997 |
| 5574343 | Control of activators in motor vehicle doors A system for controlling actuating members in the doors of motor vehicles has at least one electromotive actuating drive and at least one actuating element (switch, button) in the door of the motor vehicle, as well as a control unit located in the vehicle... | 11/12/1996 |
