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Class Information
Number: 318/565
Name: Electricity: motive power systems > Positional servo systems (e.g., servomechanisms) > With protective or reliability increasing features (e.g., "fail-safe" systems) > Monitoring systems
Description: Subject matter in which the system includes one or more elements whose sole function is to test or monitor the performance of similar elements in the servo loop and to disable the servo upon a failure of one of the similar elements.










Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
8659249 Method of controlling a motor Feb. 25, 2014
8659254 Servo system, servo motor driving device, safety unit and method for controlling servo system Feb. 25, 2014
8626063 Wireless telemetry auto tuning for torque measurement system Jan. 7, 2014
8604741 Secure monitoring and control device for aircraft piloting actuator Dec. 10, 2013
8587246 System and method for estimating electrical current in motor control circuits to improve performance and diagnostic capability Nov. 19, 2013
8588975 Robot safety monitor device, and robot safety monitor method Nov. 19, 2013
8525463 Malfunction determination device for motor control system Sep. 3, 2013
8513909 Processing a motor variable of a DC motor and actuating device for a motor vehicle Aug. 20, 2013
8478487 Control device for vehicles to make rapid counter-measure against communication abnormality in communication means between calculation control devices Jul. 2, 2013
8436570 Motor driving system, motor controller, and safety function expander May. 7, 2013
8415836 Microcomputer system Apr. 9, 2013
8384331 Servo system and safety control device Feb. 26, 2013
8373376 Drive system and method for activating the same Feb. 12, 2013
8346408 Fault tolerant flight control system Jan. 1, 2013
8344683 Apparatus for sensorless positioning with signal amplifier Jan. 1, 2013
8292261 Secured water and/or air dispenser for snowmaking system, equipped with an electric-actuator-driven valve Oct. 23, 2012
8222855 System and method for non-sinusoidal current waveform excitation of electrical machines Jul. 17, 2012
8190287 Tool vector display apparatus for a machine tool with rotational axes May. 29, 2012
8183815 Method and control device for automatically determining a mass of a door system May. 22, 2012
8183809 Drive device for at least one electric motor and drive control unit interacting with the drive device May. 22, 2012
8154239 Medical manipulator Apr. 10, 2012
8103153 Reliable monitoring of the speed in coordinate measuring appliances Jan. 24, 2012
8090474 Apparatus for controlling at least one machine Jan. 3, 2012
8086329 Method of actuator control Dec. 27, 2011
8072173 Servo motor monitoring apparatus Dec. 6, 2011
8040097 Servo motor drive control device for calculating consumed electric energy and regenerated electric energy Oct. 18, 2011
8040099 Position device in gantry type of construction Oct. 18, 2011
8030865 Brushless DC motor and image pickup apparatus Oct. 4, 2011
8026689 Control device for machine tool Sep. 27, 2011
8023234 Method for detecting earth-fault conditions in a motor controller Sep. 20, 2011
8014898 Controller of robot used combined with machine tool Sep. 6, 2011
8004226 Method and system for detecting a failed current sensor in a three-phase machine Aug. 23, 2011
7965055 Control device of work positioning apparatus Jun. 21, 2011
7952314 Electronic control device of an electrical drive system with redundant disconnection device May. 31, 2011
7928674 Motor speed control systems Apr. 19, 2011
7928677 Motor control circuit and method with mechanical angle reconstruction Apr. 19, 2011
7928681 Disk apparatus capable of determining failure of spindle motor Apr. 19, 2011
RE42200 Fault handling of inverter driven PM motor drives Mar. 8, 2011
7893644 Ultra-compact, high-performance motor controller and method of using same Feb. 22, 2011
7888900 Apparatus and method for robot handling control Feb. 15, 2011
7863846 Assembly of a motor vehicle body and control device of such an assembly Jan. 4, 2011
7853377 Method and apparatus for communication within control systems Dec. 14, 2010
7782009 Adjustable speed drive protection Aug. 24, 2010
7750590 Display apparatus having turntable display Jul. 6, 2010
7737653 Method of controlling a motorized window treatment Jun. 15, 2010
7723940 Non-redundant safety monitoring for an electric drive mechanism (with a sensor) May. 25, 2010
7693628 Controller with communication of multi-source tasks Apr. 6, 2010
7683564 System for monitoring load and angle for mobile lift device Mar. 23, 2010
7675257 Methods and systems for recording operating information of an electronically commutated motor Mar. 9, 2010
7664377 Driving apparatus for a ceiling fan Feb. 16, 2010

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