About 52 results
https://drivepatents.com/patents/1071355 · 28 Dec 2005
A current detection unit (60a) samples motor current (MCRT) at every cycle corresponding to a cycle of the highest processing speed of a CPU. A current integral calculation unit (62) integrates the value of the sampled motor current (MCRT) over a sampling ...
https://drivepatents.com/patents/1075784 · 20 Jul 2005
A motor driver capable of detecting the insulation deterioration of a motor easily and inexpensively is disclosed. The voltage supplied from an AC power supply (1) is rectified by a first rectifying circuit (D1 to D6) and smoothed by a capacitor (C) in a p...
https://drivepatents.com/patents/1083845 · 22 Sep 2004
A leakage detection apparatus is provided, capable of performing high-speed leakage detection during startup of a motor-vehicle such as an HEV. The apparatus includes a signal generator 31 for generating a signal whose frequency is set variably, a resistor...
https://drivepatents.com/patents/1089070 · 10 Mar 2004
A fault detection system for detecting an unwanted electrical path between a reference potential and at least one of: a) a floating power source, b) a first power conductor coupled to a first terminal of the power source, and c) a second power conductor co...
https://drivepatents.com/patents/1091048 · 17 Dec 2003
The method involves detecting fault points between drive (3.1) and driven (3.2) shafts of a propeller shaft arrangement (3), especially in a railway vehicle drive train, coupled to a 3-phase machine (2). A signal representing the degree of a fault position...
https://drivepatents.com/patents/1096265 · 2 May 2003
In regenerative braking mode, an inverter (14) converts, according to PWMC signal from a control unit (30), an AC voltage generated by a motor (M1) into a DC voltage to supply the converted DC voltage to an up-converter (12) which down-converts the DC volt...
https://drivepatents.com/patents/1097418 · 19 Mar 2003
In a battery control device for controlling input to and output from a battery pack of the present invention, the battery pack includes a plurality of serially-connected battery blocks each including a plurality of serially-connected unit batteries. The de...
https://drivepatents.com/patents/1097969 · 5 Mar 2003
Arcing in dc electrical systems (1) subject to cyclic disturbances is detected by a current sensor (13), and a bandpass filter (17) sensitive to arcing noise, which filters the sensor current. The absolute value of the bandpass filtered signal (19) is inte...
https://drivepatents.com/patents/1101173 · 9 Oct 2002
A permanent magnet machine (12) is driven by an inverter (142) and a fault-mode processor (200) generates a switch control signal applied to switches (202,204) so that the values of the respective current components are computed by the processor in lieu of...
https://drivepatents.com/patents/1103023 · 24 Jul 2002
Input received through input rectifier is connected via an intermediate circuit to a converter that generates a square wave voltage to drive a motor. The intermediate circuit PTC resistor (200) has a voltage load limit of 600V and a holder (205) with upper...