About 23 results
https://drivepatents.com/patents/979119 · 29 Jan 2014
An uninterruptible power supply (UPS) apparatus is disclosed that can receive power from different electrical utility configurations. The input stage (200) of the UPS includes a three phase rectifier bridge (140) design having three legs (110,120,130) conf...
https://drivepatents.com/patents/992033 · 10 Apr 2013
A smooth switching device and method for double power supplies. The devices includes a main/backup power supply switching unit (1), a relay control unit (3), a charge management unit (2), a main power supply switching auxiliary unit (4) and a backup power ...
https://drivepatents.com/patents/992946 · 13 Feb 2013
The present invention provides a hold-up time circuit, a hold-up time method, and a power supply system. The circuit includes an energy storage capacitor, a step-down circuit and a step-up circuit. A first input end and a second input end of the step-down ...
https://drivepatents.com/patents/996107 · 14 Nov 2012
The device has an energy storage unit (4) i.e. capacitor, comprising a plus pole (5) and a minus pole (6). A directional electric current meter (10) comprises a decoupling component, a bypass diode (11) and a current-measuring element (12) i.e. fuse. The b...
https://drivepatents.com/patents/1001587 · 13 Jun 2012
A motor driving circuit has a driving device (37, 38) for receiving a driving signal and driving a motor based on the driving signal. When the motor is driven, the motor is energized through a first control circuit (32, 33) and a second control circuit (34...
https://drivepatents.com/patents/1005268 · 15 Feb 2012
A smart capacitor (50) includes a main capacitor (30) having at least one intelligence mechanism (40,42,44) selected from a prognostics mechanism and a high speed protection mechanism integrated within the main capacitor (30). The at least one intelligence...
https://drivepatents.com/patents/1009618 · 7 Sep 2011
The assembly has an uninterruptible supply device (32) including a switch (50) arranged and controlled to selectively connect an electrical connection circuit (36) or an alternating current supply circuit (38) to a supply port (12) based on a continuous cu...
https://drivepatents.com/patents/1016377 · 19 Jan 2011
A main power supply (13) and a backup power supply (14) have the same set voltage. To prevent electrical power from being supplied from the backup power supply (14) to a load circuit (2), during a normal operation, a power supply control unit (11) gives a ...
https://drivepatents.com/patents/1016497 · 19 Jan 2011
A telecommunication system (100) incorporates a vanadium redox battery energy storage system (102). The vanadium redox battery energy storage system (102) receives and is charged by DC power. Upon power interruption, telecommunication equipment relies on t...
https://drivepatents.com/patents/1075539 · 27 Jul 2005
A lock key is unlocked in a state where a cellular phone is processing a call and using an external battery as the power supply. A "HIGH" signal is inputted to a connection detection circuit before the power supply from the external battery stops. A contro...