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Robert Eugene Kasten, Bruce Craig Newendorp, Norman Frederick Lemmon: Variable current limit control for vehicle electric drive system. Deere & Company, December 10, 2002: US06492785 (335 worldwide citation)

A vehicle electric drive system includes an internal combustion engine, an electric motor/generator driven by the engine, a first inverter/rectifier coupled to motor/generator, a bus coupled to the first inverter/rectifier, a second inverter/rectifier coupled to the bus, and a traction motor/generat ...


2
Jason M Sachs, John David Heinzmann: Dynamic current limiting. DEKA Products Partnership, Bromberg & Sunstein, January 31, 2006: US06992452 (53 worldwide citation)

A system and method for generating commands for current subject to dynamic determinations of a limit. In one embodiment, the dynamically determined limit is a function of power dissipation in a component estimated from a measured current level and as a function of a measured temperature proximate to ...


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Kevin M McLaughlin, Stuart W Parker, Hristos K Mantjios: Method and apparatus for controlling an electric assist steering system using an adaptive torque filter. TRW, Tarolli Sundheim & Covell, December 5, 1995: US05473231 (33 worldwide citation)

A steering assist system (10) providing assist in response to a steering control signal includes a vehicle speed sensor (56) for sensing vehicle speed and for providing a speed signal having a value indicative of the sensed vehicle speed and a torque sensor (44) operatively connected to a vehicle ha ...


5
Hubert Walz: Method and circuit arrangement for operating an electric motor. Marquardt, Spencer & Frank, May 19, 1998: US05754019 (31 worldwide citation)

The invention relates to a method for operating an electric motor in an electrical hand-held tool, such as an electric screwdriver, battery-powered drill or the like, the electric motor being operated during the operating phase (17) at a first rotation speed, which can possibly be preset variably, u ...


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Alberto Bilotti, Jose L Tallarico: Bridge motor driver with short-circuit protection and motor-current limiting feature. Allegro Microsystems, October 10, 1995: US05457364 (29 worldwide citation)

A full-wave bridge driver has four driver transistors. A motor is connected to the output terminals of the bridge. A fault detector latches off the four driver transistors when the bridge current jumps essentially instantaneously to exceed a predetermined safe-peak value due to a fault occurring in ...


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Mark Dennis Kushion: Diagnostic system for electric motor. Delphi Technologies, Edmund P Anderson, August 7, 2001: US06271637 (26 worldwide citation)

A diagnostic system for electric motors, such as those used in automotive applications. The system comprises a controller for supplying a desired command current to said electric motor, a sensor for measuring the rotational speed of the motor, a sensor for measuring the actual current supplied to th ...


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Yoshiyuki Okano: Control apparatus for brushless DC motor. Nippondenso, Cushman Darby & Cushman IP Group of Pillsbury Madison & Sutro, July 7, 1998: US05777447 (26 worldwide citation)

A torque command value is calculated in response to a command. A torque current is calculated on the basis of the calculated torque command value. The torque current is to be driven through an armature winding of the brushless DC motor, and is in phase with an electrical angle of the brushless DC mo ...


9
Yuji Takatsuka, Shigeki Ohtagaki: Motor driving apparatus. Mitsubishi Denki Kabushiki Kaisha, Sughrue Mion Zinn Macpeak & Seas PLLC, March 30, 1999: US05889376 (25 worldwide citation)

A motor driving apparatus which makes it possible to continue a suppressed power supply to an electric motor even when a detected value (Id) of a current flowing to an H-bridge circuit indicates abnormality, to thereby prevent occurrence of shock in a system in which the motor is employed as a drive ...


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Rickey L Busick, Mark S Taylor, Stephen T Walsh: Method and apparatus for limiting motor current. Cincinnati Milacron, Wood Herron & Evans, December 13, 1994: US05373205 (23 worldwide citation)

A method and apparatus for limiting current through a switching device supplying current to a load. A control evaluates a model representing the switching device temperature as a nonlinear function of current and time. The model compares the temperature of the switching device to a maximum allowable ...