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7535191 |
Power window device
A power window device that suppresses heating in a motor used to lower and raise a window glass. For each door of a vehicle, the power window device includes an ECU that controls a motor in...
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7372226 |
Method for switching off a power tool
In a method for shutting off a drive motor ( 12 ) of a power tool that drives a tool, the drive motor ( 12 ) is shut off as a function of a variable threshold value (E 1 ) if the tool jams. The...
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6515441 |
Glass edge object detection sensor
An object detection system includes a sensor in communication with a controller which identifies contact with the sensor. In a preferred embodiment the sensor is a piezo film which generates a...
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6225769 |
Device for operating an electric motor
A device for operating an electric motor (10) is proposed, which evaluates overloading or blocking of the drive (11) from a characteristic of a current (40, 41) flowing through the electric motor...
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5854546 |
Suppression of radio frequency emissions
For the suppression of radio frequency emissions from an electrical drive comprising an electric motor supplied with electrical power via an electronic controller having a high speed switching...
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5774625 |
Arrangement for monitoring the rotational speed of a rotary-anode drive motor of x-ray
The invention relates to an X-ray apparatus, comprising a rotary-anode X-ray tube, a device for monitoring the rotational speed of a rotary-anode drive motor of the X-ray tube, a sensor circuit for...
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5712551 |
Starting circuit protection apparatus and method for brushless DC motor compressor
A brushless DC motor compressor starting circuit protecting apparatus for a refrigerator and a method thereof, for controlling excessive current flowing through a coil of a brushless DC motor which...
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5016133 |
Apparatus for flicker protection when a servo-motor starts
An apparatus for flicker protection when a servo motor driven sewing machine starts utilizing comparators. Setting the original voltage as the reference voltage and the dropped voltage as the...
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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...
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4468597 |
Method for regulating the power supply to a direct-current motor and a device for the application of said method
The power supply to an electric actuating motor is regulated by reducing the differences between current intensity or voltage and a reference value. Two transducers measure the current intensity...
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4305028 |
System for evaluating the capability of a work-performing robot to reproduce a programmed series of motions
A system for evaluating whether a work-performing robot can perform a series of programmed motions is disclosed which includes means for continuously comparing the velocity of the various links of...
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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...
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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...
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3729666 |
DC COMMAND SMOOTHING CIRCUIT
A DC command smoothing circuit which converts step inputs to smoothed command outputs. Although different polarity and magnitude outputs can be generated, only a single operational amplifier is...
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3384796 |
Strip break control to stop drive motors
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3107338 |
Electrical monitoring system
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2962860 |
Temperature rate responsive fuel control for a gas turbine engine
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2942139 |
Motor drive control circuit
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2858493 |
Rate inertia compensation for reel tension regulator
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2853668 |
Motor control systems
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2791685 |
Signal seeking receiver with stop-hunting means responsive to both carrier strength and time-derivative thereof
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