About 37 results
https://drivepatents.com/patents/1366781 · 11 Jul 2024
Example control methods and apparatus are described. An example control method for an uninterruptible power supply system includes: when a bypass power supply branch supplies power to a load, outputting a first drive signal to a first switch device and out...
https://drivepatents.com/patents/1330486 · 27 Oct 2022
A system for providing power to a server cabinet has at least one power distribution unit PDU located vertically positioned near a sidewall of a server cabinet such as to not take up any U-space and at least one battery connected to the PDU and positioned ...
https://drivepatents.com/patents/967208 · 19 Nov 2014
A power conversion circuit (1000) comprises at least one converter module (1100) comprising a first (1110) and a second (1120) step-up converter for converting a rectified AC voltage and/or a DC voltage into a DC supply voltage; an inverter module (1330) w...
https://drivepatents.com/patents/968737 · 15 Oct 2014
The invention relates to an uninterruptible power supply (1), comprising a base unit (2), a battery module (3), an input terminal area (4) for connection to a supply network (5), an output terminal area (6) for connection of an electrical consumer (7) desi...
https://drivepatents.com/patents/974354 · 28 May 2014
A UPS includes an input that receives first power from a utility source to power a load and receives second power from the utility source. The load is separate from the UPS. An inverter receives when in a first mode, the first and second power and when in ...
https://drivepatents.com/patents/978792 · 5 Feb 2014
Systems and methods are provided for controlling an uninterruptible power supply (UPS) to transition between three- or higher-level operation and two-level operation in a neutral-point-clamped (NPC) inverter (22). In an example, a UPS system (10) includes ...
https://drivepatents.com/patents/990492 · 22 May 2013
A permanent magnet generator system (10; 30) provides protection from fault conditions. The system includes a permanent magnet generator (12; 32) having a first, second, and third winding (L1, L2, L3) wherein each winding has a first end (a, b, c) and a se...
https://drivepatents.com/patents/990441 · 22 May 2013
The device has output converters (12) connected to a side of a charger (10) by an input. The charger is a unidirectional voltage and reversible current converter allowing reloading and maintaining energy reserve (11) from a network, in a load phase. The ou...
https://drivepatents.com/patents/985327 · 27 Mar 2013
The drive has a control device (17) activating a switching device (7) for a motor (1) when energy is fed into a back-up capacitor (4) from a power supply network (5). The control device automatically sets a required deflection to an idle position when a ro...
https://drivepatents.com/patents/1008521 · 19 Oct 2011
A high reliability dual power sources automatic switch circuit is provided. The dual power sources automatic switch circuit includes a main power source circuit (41) and a backup power source circuit (42) installed respectively in a main circuit automatic ...