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| Number | Title | Issue Date |
| 7515389 | Method and device for safely disconnecting electric drives The invention relates to a method and a device for safely disconnecting electric drives, wherein disturbances of the electric drive which are independent from the driving and lifting speed are recognized in a delay-free manner by retaining the safety function and ar... | 04/07/2009 |
| 7453675 | Turbo machinery speed monitor This invention relates to a speed monitor apparatus for monitoring speed and acceleration of rotating turbine equipment (turbomachinery) and for operating an overspeed trip to shut down the equipment in the event that the speed or acceleration exceed predetermined t... | 11/18/2008 |
| 7372219 | Belt driven centrifugal separator with multi-stage, belt deterioration alerting display In a centrifugal separator of the type in which driving power of a motor is transmitted to a rotor via a power transmission mechanism, such as a belt, a motor-rotation signal frequency fm and a rotor-rotation signal frequency fr are computed, on the basis of which a... | 05/13/2008 |
| 7355828 | Turbo machinery speed monitor This invention relates to a speed monitor apparatus for monitoring speed and acceleration of rotating turbine equipment (turbomachinery) and for operating an overspeed trip to shut down the equipment in the event that the speed or acceleration exceed predetermined t... | 04/08/2008 |
| 7327541 | Operation of dual-directional electrostatic discharge protection device A two-terminal ESD protection structure formed by an arrangement of five adjacent semiconductor regions (112, 114, 116, 118, and 120) of alternating conductivity type provides protection against both positive and negative ESD voltages. The middle semic... | 02/05/2008 |
| 7267391 | Method of controlling power slide device for sliding vehicle slide door In the present control method of a powered sliding device, a sliding movement of the sliding door in the closing direction by an external force is monitored after the sliding door is slid in the opening direction by the motive power of the motor to reach the opening... | 09/11/2007 |
| 7218490 | Process and device for determining a run-away condition of a rotation-speed controlled, permanent-excited synchronous motor A process and device for determining a run-away condition of a rotation-speed controlled, permanent-excited synchronous motor are described. The process continuously checks, when a rotation speed controller is active and for a predetermined constant rotation speed s... | 05/15/2007 |
| 7143216 | System for configuring expandable buses in a multi-device storage container and related method A system and method for configuring expandable buses wherein a host supports a plurality of expandable buses are provided. A plurality of devices are arranged to form a plurality of groups. Each group forms a chain of devices on an expandable bus. Each chain include... | 11/28/2006 |
| 7109833 | Terminal block time delay relay A terminal block time delay relay includes a terminal block, a plurality of terminals, a first timing control, and a timing circuit. The terminal block defines a socket operable to receive an electrical relay. The plurality of terminals are accessible at edges of th... | 09/19/2006 |
| 7023152 | Driving control device for actuator A driving control device for an actuator comprises a driving device to drive an actuator having an electric motor (30) and a driving control device (50) to control the rotation of the electric motor (30) by controlling the driving device. The dr... | 04/04/2006 |
| 6979979 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 12/27/2005 |
| 6949903 | Method and apparatus for digitizing a voltage When digitizing a voltage, a capacitor is charged, through an impedance, to a voltage value (Um) dependent on the voltage to be digitized. The limits of that one of a plurality of voltage ranges in which said voltage value (Um) lies, are ascertained, and the two lim... | 09/27/2005 |
| 6925942 | Control method of sliding a vehicle door by a powered sliding device A control method of a powered sliding device for a vehicle sliding door, wherein when an operating switch for starting a powered sliding device is pressed to open the door, and if the vehicle speed is about 3 km/h or less and the foot brake or the parking brake is o... | 08/09/2005 |
| 6917179 | Load driver and control method for safely driving DC load and computer-readable recording medium with program recorded thereon for allowing computer to execute the control In regenerative braking mode, an inverter converts, according to PWMC signal from a control unit, an AC voltage generated by a motor into a DC voltage to supply the converted DC voltage to an up-converter which down-converts the DC voltage to charge a DC power suppl... | 07/12/2005 |
| 6909263 | Gas turbine engine starter-generator exciter starting system and method including a capacitance circuit element A rotating electrical machine, such as an aircraft starter-generator, that includes an exciter that has its stator windings supplied with electrical power from a power supply. One or more switches are electrically coupled between the exciter stator winding and the p... | 06/21/2005 |
| 6906901 | Cooling apparatus for integrated circuit A cooling apparatus for an integrated circuit. The cooling apparatus comprises cooling fan means, a control circuit and heat pipe means. The control circuit determines a spinning speed of the cooling fan and an operation performance mode of the integrated circuit ac... | 06/14/2005 |
| 6789000 | Microprocessor-based control system for gas turbine electric powerplant A microprocessor-based control system for a gas turbine electrical powerplant the microprocessor-based control system controls the startup, operation, and shutdown of the gas turbine electric powerplant. The microprocessor-based control system of the present inventi... | 09/07/2004 |
| 6777925 | Input circuit for inductive engine speed sensor A circuit for inputting and processing a signal from a speed sensor element, includes a comparator having first and second input terminals and first and second input circuits connected to receive the signal. The first input circuit is connected to a first input term... | 08/17/2004 |
| 6683774 | Monitoring system for electrical angle calculator A monitoring system monitors a microcomputer in which an angle calculator calculates the electrical angle of a motor using output signals from a rotation angle sensor. In the microcomputer, a control signal generator generates a coded control signal that ... | 01/27/2004 |
| 6496340 | Arrangement with an electric motor The rotation speed of an electric motor (9) is controlled by a controller (6) which receives its setpoint from a characteristic function (23). The characteristic function (23) calculates a setpoint for the controller (6) on the basis of an originally anal... | 12/17/2002 |
| 6396688 | Series fan speed control system A redundant fan system includes an in-series configuration of adjustable speed fans. A speed controller coupled to the fan system includes a first fan operated at a constant operating speed and a second fan operated at an adjusted operating speed to maint... | 05/28/2002 |
| 6359762 | Control method of sliding a vehicle door by a powered sliding device A control method of a powered sliding device having a wire drum coupled through a wire cable with a sliding door slidably attached to a vehicle body, a motor for rotating the wire drum by the electric power from a battery, a voltmeter for measuring the ba... | 03/19/2002 |
| 6258634 | Method for manufacturing a dual-direction over-voltage and over-current IC protection device and its cell structure A two terminal ESD protection structure formed by an alternating arrangement of adjacent p-n-p-n-p semiconductor regions provides protection against both positive and negative ESD pulses. When an ESD pulse appears across the two terminals of the ESD prote... | 07/10/2001 |
| 6256181 | Fan drive device A fan drive device is not affected by variations in the strength of the fan drive motor rotor magnet or the components of the circuit for detecting fan drive motor induction voltage, or by the capacitance of a high capacitance capacitor in a dc supply cir... | 07/03/2001 |
| 6252753 | Energy service stabilizer An electrical power distribution system having geographically separated plural generation stations and geographically separated loads is improved by dynamically offsetting a nominal real power operating point of a main control system driving a power contr... | 06/26/2001 |
| 6075685 | Speed protection system for a machine and a method thereof The present invention relates to a speed protection system for monitoring the speed of a rotating shaft in a machine. The speed protection system includes a first speed detection system, a first time delay system, and a first time delay system. The first ... | 06/13/2000 |
| 6014307 | Fire door operator having an integrated electronically controlled descent device A fire door opener and method of electronically controlling the door descent speed is described. The operator includes a DC brake solenoid coupled to an AC motor drive system with an inline gear reducer and an electronically controlled descent device with... | 01/11/2000 |
| 5917688 | Centrifugal apparatus with protection A centrifugal apparatus is disclosed which includes a rotor, a motor, a speed signal generator, including a disc having alternate reflective and non-reflective stripes, for generating a rotating speed signal of the rotor, a microprocessor (mpu), an analog... | 06/29/1999 |
| 5796221 | Overload detector for servo driven machines A controller for detecting abnormal operating conditions of a continuous motion machine such as a packaging machine. The acceleration and velocity of motors for the various axes of the machine are examined by the controller and rapid deceleration or a mor... | 08/18/1998 |
| 5726881 | Centrifugal apparatus with overspeed protection A centrifugal apparatus includes a rotor having a marker for generating an index signal, a motor for rotating the rotor, first and second detectors for detecting the index signal with rotation of the rotor to generate first and second detection signals, a... | 03/10/1998 |
| 5604654 | Permanent magnet direct current motor Disclosed is an improvement to the stability of D.C. motor brushes mounted in brush boxes with wings is improved by angling the wings toward the commutator such that the brush spring contacts the brush at one or more points intermediate the ends of the br... | 02/18/1997 |
| 5602708 | Process and device for electronically monitoring the overload on electric motor drives A process and a circuit arrangement are proposed for electronically monitoring the overload on electric motor drives and in the case of which process and circuit arrangement speed is .monitored in addition to the known methods for real power monitoring. T... | 02/11/1997 |
| 5571062 | Treadmill safety module A safety module for a motor speed control circuit, when speed control circuit has a failure mode in which full power is applied to the motor being driven by the speed control circuit. The safety module has a high pass filter coupled to a variable voltage ... | 11/05/1996 |
| 5510760 | Ground fault interrupter wiring device with improved latching and actuating components A ground fault interrupter (gfi) wiring device includes a latch member having integral abutment, latching and spring portions. In the preferred embodiment, the latch member is formed from a unitary blank of springy sheet metal, the spring portion being a ... | 04/23/1996 |
| 5357392 | Motor drive device comprising a tacho-generator that can be configured as a back-up motor Disclosed is a motor drive device with tacho-generator that can be configured as a back-up motor. This device is designed for the driving of a movable element. It comprises an electrical rotor motor with supply coil, associated with a tachometrical sensor... | 10/18/1994 |
| 5103213 | Shaft rotation monitoring apparatus A photo-optical coupler is connected to a shaft to provide a series of electronic pulses at a frequency corresponding to rotational velocity of the shaft. Apparatus electronics is responsive to frequency of such pulses for indicating a low speed alarm con... | 04/07/1992 |
| 4667114 | Prime mover speed sensing system and method A method and apparatus for detecting a failure in the speed sensing system of a rotating shaft prime mover. The control system for the rotating shaft prime mover includes a speed sensing system for measuring the rotational speed of the shaft, a speed feed... | 05/19/1987 |
| 4644229 | Power supply for lighting incandescent lamp wth high-brightness The present invention provides a power supply for lighting an incandescent lamp with high-brightness, comprising connecting a time constant circuit, rectifier, switching device so that the output of the rectifier is supplied to an incandescent lamp throug... | 02/17/1987 |
| 4504769 | Electrically-powered tool In an electrically-powered tool, the driving motor of the tool and a switching element for a phase control circuit for controlling the number of revolutions of the motor are connected in series. The switching element is fixed to a field core of the motor.... | 03/12/1985 |
| 4471735 | Idling controller, particularly for automotive vehicles In an idling controller, particularly for automotive vehicles, there are present both a control amplifier with integral time portion (3) and a limiter (6) with proportional time portion. The inputs of the limiter are acted on by the correcting variable fr... | 09/18/1984 |
