About 31 results
https://drivepatents.com/patents/1004906 · 29 Feb 2012
An electric motor car control system includes a resistor 17a connected parallel to a cut-off switch 15, or a switch 18 for grounding terminals of an alternating-current motor, to discharge electric charges accumulated in stray capacitors 16 of the motor, w...
https://drivepatents.com/patents/1007889 · 16 Nov 2011
An AC ground fault detector system for sensing an AC signal indicative of an unintended electrical path between a load driven by a power source and a reference potential comprises a first power conductor coupled to a first terminal of the power source and ...
https://drivepatents.com/patents/1013896 · 13 Apr 2011
An inverter is forcibly operated to supply electric power to a motor, thereby performing detection of a current leakage, on condition that a power-on operation is performed, that the motor is stopped, and that determination,as to occurrence or non-occurren...
https://drivepatents.com/patents/1013880 · 13 Apr 2011
A ground fault sensing device for a drive system that converts direct current electrical power from a direct current power supply (30) into alternating current electrical power and drives an electric motor (10) with that alternating current electrical powe...
https://drivepatents.com/patents/1013895 · 13 Apr 2011
In a construction machine in which a motor is driven by battery power through an inverter in accordance with operation of an operating lever, current-leakage detection signal output means applies a voltage signal, which is adapted for detection of a curren...
https://drivepatents.com/patents/1015993 · 2 Feb 2011
In an electric power steering system, an ECU 11 that controls the operation of the system includes three independent microcomputers 18u, 18v, 18w that perform phase current feedback control with respect to the corresponding phases, so that sinusoidal curre...
https://drivepatents.com/patents/1072161 · 30 Nov 2005
A hub unit for use in electrically assisted bicycles has an improved effect to radiate heat from a stator. A hub (7) has inner teeth (66a) meshable with planetary gears (65) and a fixing support shaft (57) projecting from opposite ends of the hub and provi...
https://drivepatents.com/patents/1092712 · 8 Oct 2003
Safety system for an electric motor or drive comprises a simple safety loop that is controlled and monitored by a central computer. The loop forms a circular connection of all units with power outputs.
https://drivepatents.com/patents/1093914 · 20 Aug 2003
An AC ground fault detector system for sensing an AC signal indicative of an unintended electrical path between a load driven by a power source and a reference potential comprises a first power conductor coupled to a first terminal of the power source and ...
https://drivepatents.com/patents/1101903 · 11 Sep 2002
A transverse flux drive is described having at least a first component (24) and a second component (10) which are rotatable relative to one another about a rotation axis (18) and contain at least one phase (winding) of a transverse flux machine, which has ...