Class / Patent application number | Description | Number of patent applications / Date published |
361077000 | Reverse phase responsive | 7 |
20080198522 | Device and Method for Supplying Direct Voltage - The invention relates to a device and method for supplying direct voltage, wherein said device comprises a first connection arrangement ( | 08-21-2008 |
20090128972 | THREE-PHASE DETECTION MODULE - An apparatus includes a first optocoupler and a control module. The first optocoupler selectively allows a first current to flow from a first one of a first pair of N power supply lines to a second one of the first pair. N is an integer greater than two. The N power supply lines each provide a phase signal. The control module controls the first optocoupler and determines an occurrence of a phase failure of the phase signals based on a first signal, which is based on the first current. | 05-21-2009 |
20100208401 | INDUCTIVE LOAD DRIVING CIRCUIT - An inductive load driving circuit includes a control circuit and a protection circuit. The control circuit controls switching operation of a switching circuit. In normal connection of a battery, the switching circuit switches current-carrying to an inductive load between on and off. In reverse connection of the battery, the switching circuit can carry current in a direction reverse to a direction in the normal battery connection. The protection circuit has a current breaker that conducts at least at switching of the current-carrying from on to off by the switching circuit in normal battery connection and, in the reverse battery connection, does not conduct according to the reverse battery connection. | 08-19-2010 |
20110134576 | Power delivery circuit having protection switch for reverse battery condition - According to one disclosed embodiment, a power delivery circuit includes a switch for protection of a load in a reverse battery condition. The load is coupled in cascade with the protection switch, where the protection switch disconnects the load from the battery in the reverse battery condition. The protection switch does not include p-n junction diodes present in conventional protection switches using FETs. The protection switch utilizes, for example, a GaN HEMT, that does not include a p-n junction diode. Thus, the threat of internal conduction in the protection switch during a reverse battery condition is eliminated. The power delivery circuit also protects the load in a load dump condition. | 06-09-2011 |
20120120534 | Three-Phase Detection Module - A method includes receiving N power signals, each having a different one of N phases, over N power supply lines, where N is an integer greater than two. The method further includes selectively activating a first switch to allow a first current to flow from a first one of the N power supply lines to a second one of the N power supply lines. The method includes generating a signal based on the first current, and selectively generating a phase failure signal when the signal is less than a predetermined threshold. | 05-17-2012 |
20160072280 | SYSTEM AND CONTROL METHOD TO IMPROVE THE RELIABILITY AND RANGE OF MINERAL INSULATED ELECTRICAL CABLES - Embodiments include a system, control process, and method for improving the reliability of mineral insulated electrical cables for use in oil and gas industry applications. The embodiments may include a PWM variable speed drive having an optimized operating frequency, a sine wave filter connected to an output of the drive and designed to mitigate reflective voltage wave spikes from the drive's PWM voltage pulses, a mineral insulated electrical heater cable connected to the filter, and an external controller for receiving voltage, current, and temperature feedback to create a voltage set point at which the drive operates. The embodiments may (i) mitigate common failure mechanisms of mineral insulated cables operating at a medium voltage level and in a temperature range of from 200° C. to 700° C.; (ii) extend the range of application of mineral insulated cables; and (iii) prevent high voltage spikes from causing damage to the insulant material of heater cables. | 03-10-2016 |
20190148931 | IDEAL DIODE WITH ACTIVE REVERSE VOLTAGE PROTECTION | 05-16-2019 |