| Patents for H02H 7 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions (32,726) |
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| 05/18/1994 | EP0597272A2 Safety cutoff power window control device |
| 05/18/1994 | EP0596879A1 Process and arrangement for recognizing defects in power converters. |
| 05/18/1994 | CN2165570Y Electricity-saving protector for motor-driven sewing machine |
| 05/18/1994 | CN2165562Y Overvoltage protector for output loop of electronic instrument |
| 05/18/1994 | CN2165561Y GTO inverter through short circuit protector |
| 05/18/1994 | CN2165560Y Universal motor protector |
| 05/18/1994 | CN2165559Y Motor protector |
| 05/18/1994 | CN2165558Y 无源异步电动机保护器 Passive asynchronous motor protection |
| 05/18/1994 | CN2165557Y Multifunctional protector for motor |
| 05/18/1994 | CN2165556Y All-purpose automatic protection switch for motor |
| 05/11/1994 | WO1994010733A1 Device for protecting an inverter |
| 05/11/1994 | EP0596566A2 High-voltage transformer |
| 05/11/1994 | EP0596472A2 Circuit arrangement for feeding an inductive load |
| 05/11/1994 | EP0596357A1 Laser diode automatic power control circuit with means of protection of the laser diode |
| 05/11/1994 | CN2164608Y Universal electronic phase-loose protector |
| 05/11/1994 | CN2164607Y Phase-loose protector for electric motor |
| 05/11/1994 | CN2164605Y Phase-loose protector |
| 05/11/1994 | CN1086639A Inverter protection device |
| 05/04/1994 | EP0595452A1 Control apparatus for power window |
| 05/04/1994 | CN1024428C Operation control circuit for pump motor |
| 05/03/1994 | US5309109 Forcible grounding generation equipment and grounding occurrence detection equipment using the same |
| 05/03/1994 | US5309076 Drive and control circuit for a brushless DC motor |
| 04/28/1994 | WO1994009240A1 Electromotive drive |
| 04/28/1994 | DE4307866A1 Elektromotorischer Antrieb Electric motor drive |
| 04/27/1994 | CN2163472Y Phase loss overload protector for electric motor |
| 04/26/1994 | US5307256 Trickle charge circuit for an off-line switching power supply |
| 04/26/1994 | US5306998 Protection control circuit for a variable speed hoisting device |
| 04/26/1994 | US5306990 Electric motor control apparatus including an output stage protected against malfunction and damage |
| 04/21/1994 | DE4235138A1 Storage capacitor discharging circuit for electric drive current regulator - using passive and/or active components of current regulator and supplied drive motor |
| 04/20/1994 | EP0593257A2 Boost converter |
| 04/20/1994 | EP0592927A2 Control method to limit the driving force of a drive, in particular for a door or a swinging wing and associated security circuit |
| 04/20/1994 | CN2162732Y Loss of phase protector for three-phase motor |
| 04/20/1994 | CN2162731Y Protector for motor |
| 04/20/1994 | CN2162730Y Voltage regulation device with overvoltage under-roll protection |
| 04/19/1994 | US5305235 Monitoring diagnosis device for electrical appliance |
| 04/19/1994 | US5305234 Thermal protection apparatus for a synchronous machine |
| 04/19/1994 | US5305174 Method of and device for protecting electrical power system |
| 04/19/1994 | US5304915 Overcharge preventing device and overdischarge preventing device for a secondary battery |
| 04/19/1994 | US5303461 Thermal protection for electrical machines |
| 04/14/1994 | DE4334386A1 Overcurrent protection for power semiconductor module - includes current detection electrode, transmitting detector signal w.r.t. main current flow over main current path |
| 04/13/1994 | CN2162024Y Automatic protector for electric motor |
| 04/13/1994 | CN2162023Y Electronic protective starter for electric motor |
| 04/13/1994 | CN2162021Y Automatic protector for three phase AC load phase fault |
| 04/13/1994 | CN1085356A Three-phase asynchronous motor protector |
| 04/12/1994 | US5303112 Fault detection method and apparatus |
| 04/12/1994 | US5303111 Superconducting coil protective system |
| 04/07/1994 | DE4332555A1 Overcurrent protection switch for electric motor-driven systems - computes estimate of output torque from measurements supplied by three=phase current and voltage transformers and potential dividers. |
| 04/06/1994 | EP0590227A1 Stalling detection for direct current motors |
| 04/06/1994 | EP0590088A1 Ac voltage clipper in mos-technology. |
| 03/31/1994 | WO1994007290A1 Protection triggering process |
| 03/31/1994 | WO1994007289A1 Process and device for electronically monitoring the overload on electric motor drives |
| 03/31/1994 | WO1994007152A1 Decoupling of a high-frequency error signal from a high-frequency electromagnetic field in a large electric machine |
| 03/31/1994 | DE4303018C1 Determining thermal resistance of safety switches taking account of phase current harmonics - using analogue measurement, computerised digital processing of phase currents and rapid Fourier transformation |
| 03/30/1994 | EP0589668A1 DC motor stall-detection system |
| 03/30/1994 | EP0589559A2 Input protection circuit for power converter |
| 03/30/1994 | EP0589374A1 Method and appliance for monitoring an alternating signal |
| 03/30/1994 | CN1084684A Pulsewidth-modulated inverter able to prevent short circuit |
| 03/30/1994 | CN1084679A Main motor driving circuit of toaster |
| 03/29/1994 | US5299088 Protective circuit and protective plug for telecommunication installations |
| 03/29/1994 | US5298842 Thermal protection for locomotive main traction alternators |
| 03/24/1994 | DE4232578A1 Shut=off assembly for electronically-controlled drive of working machine - monitoring load current by sensor coupled to differentiator, threshold switch and main switch for control electronics |
| 03/24/1994 | DE4231062A1 Protecting load from electrical instabilities - providing phase gate control for load with current monitor and preset optimum load conditions for each phase angle |
| 03/23/1994 | EP0588635A1 Gate power supply circuit |
| 03/23/1994 | EP0588613A2 Battery protection circuits |
| 03/23/1994 | EP0449807B1 Process for monitoring short-circuits in a voltage circuit inverter |
| 03/23/1994 | CN2159626Y Protector for electric motor |
| 03/23/1994 | CN2159625Y 电机保护器 Motor protection |
| 03/22/1994 | US5297149 Fault detection or alarm system |
| 03/22/1994 | US5297014 Switching DC power supply apparatus |
| 03/22/1994 | US5296997 System for protecting a battery |
| 03/22/1994 | US5296789 Apparatus for controlling brushless motors in response to switching transistor temperature |
| 03/22/1994 | US5296788 System for controlling a motor driven switch |
| 03/17/1994 | WO1994006258A1 Automatic zero-point recognition |
| 03/17/1994 | WO1994006189A1 Process for obtaining triggering signals by the comparison of currents at the ends of a power transmission path |
| 03/17/1994 | WO1994006188A1 Temperature monitoring process and device |
| 03/17/1994 | WO1994006187A1 Thyristor control set with overcurrent circuit-breaker |
| 03/17/1994 | WO1994006026A1 Detecting faults in power lines |
| 03/17/1994 | DE4230873A1 Verfahren und Vorrichtung zur elektronischen Überlastüberwachung an elektromotorischen Antrieben Method and apparatus for electronic overload monitoring of electric motor drives |
| 03/17/1994 | DE4230692A1 Schutzauslöseverfahren Protection triggering method |
| 03/17/1994 | DE4230059C1 Verfahren zum Gewinnen eines Auslösesignals durch Vergleich von Strömen an den Enden eines zu überwachenden Abschnittes einer elektrischen Energieübertragungsstrecke A method for obtaining a trigger signal by comparison of currents at the ends of the monitored section of an electric power transmission line |
| 03/17/1994 | DE4224620C1 Mains-isolated three=phase asynchronous rotary electrical machine speed monitor e.g. for door - has two=channel processing circuits for delivering bit signals to coupling circuit, which generates output signal when speed is above or below limits, if bit signal changes from rest to active within time window |
| 03/16/1994 | EP0587404A2 Electronic motor protection apparatus |
| 03/16/1994 | EP0587352A1 Overtemperature warning cycle in operation of polyphase dc motors |
| 03/16/1994 | CN2159078Y Protector for fuse loose-phase and leakage of electric motor |
| 03/15/1994 | US5295185 Ringing signal generation circuit with protection against overvoltage |
| 03/15/1994 | US5295035 Power distribution line protection system |
| 03/15/1994 | US5295034 Method for the overload protection of devices which cannot endure continous running on account of heat loss |
| 03/15/1994 | CA1327835C Overvoltage protection device for thyristor valve |
| 03/10/1994 | DE4230544A1 Thyristorsteuersatz mit Überstromauslöser Thyristor with overcurrent release |
| 03/10/1994 | DE4229344A1 Verfahren und Vorrichtung zur Temperaturüberwachung Method and apparatus for temperature monitoring |
| 03/03/1994 | WO1994005030A1 Protective device for an electrical consumer |
| 03/03/1994 | DE4242120A1 Automatische Nullpunkterkennung Automatic zero detection |
| 03/03/1994 | DE4237283C1 Semiconductor power loss protecting method - waiting set time between disconnection of one of 2 anti-parallel bridge circuits in converter and switching in other bridge circuit. |
| 03/02/1994 | EP0584447A1 Current measuring appliance for a length of cable |
| 03/02/1994 | EP0584155A1 A motor reverse system. |
| 03/02/1994 | CN2158149Y Passive three-phase protector for motor |
| 03/02/1994 | CN2158148Y Full-function protector for motor |
| 02/23/1994 | EP0584033A1 Antinipping protection system for winders and sunroofs in automobile vehicles |
| 02/23/1994 | CN2157627Y Double star-delta multifunction motor starter |
| 02/23/1994 | CN2157616Y Demagnetisation protection arrangement for electronic ballast |