Uninterruptible power supply I-shaped three-level forcible limiting device and method
A three-level, font-type technology, applied in the direction of circuit devices, emergency power supply arrangement, data processing power supply, etc., can solve the switch logic problem of switch tube, UPS bombing and other problems, and achieve the effect of avoiding the bombing problem
Active Publication Date: 2017-06-09
GUANGDONG INSPUR BIG DATA RES CO LTD
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Problems solved by technology
After triggering the forced current limiting logic, due to the switching logic problem of the switch tube, the UPS has a bombing problem
Method used
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[0019] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0020] Main idea of the present invention is:
[0021] When the inverter is forced to limit the current, first turn off the switch tube Q1 and the switch tube Q4, and then turn off the switch tube Q2 and the switch tube Q3. At this time, there is a time difference; when the forced current limit is released, first turn on the switch tube Q2 and the switch tube Q3, turn on the switching tube Q1 and the switching tube Q4 again, at this time, there is also a time difference, the definition of the time difference is a problem to be considered, the present invention defines the time difference from the perspective of the stray parameters of the tube, by accurately definin...
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The invention provides an uninterruptible power supply I-shaped three-level forcible limiting device and an uninterruptible power supply I-shaped three-level forcible limiting device method. During inverting forcible current limit, a switch tube Q1 and a switch tube Q4 are switched off first and then a switch tube Q2 and a switch tube Q3 are switched off, and at the moment, a time difference exists; when the forcible current limit is released, the switch tube Q2 and the switch tube Q3 is switched on first and then the switch tube Q1 and the switch tube Q4 are switched on, and at the moment, a time difference also exists; definition of the time differences is a question required to be considered, and the time differences are defined from a perspective of stray parameters of the tubes; by accurately defining the time differences of the switch tubes, the two time differences are defined as a sum of energy of an absorption capacitor and a diode stray capacitor, so that a machine burst problem caused by forcible current limit protection can be avoided.
Description
technical field [0001] The invention relates to automatic control technology, in particular to an uninterruptible power supply I-shaped three-level limiting device and method. Background technique [0002] UPS (Uninterruptible Power System / Uninterruptible Power Supply), that is, uninterruptible power supply, is a system device that connects batteries (mostly lead-acid maintenance-free batteries) with the host, and converts DC power into commercial power through modular circuits such as host inverters. . It is mainly used to provide stable and uninterrupted power supply to a single computer, computer network system or other power electronic equipment such as solenoid valves and pressure transmitters. When the mains input is normal, the UPS will stabilize the mains and supply it to the load. At this time, the UPS is an AC voltage stabilizer, and it also charges the battery inside the machine; when the mains is interrupted (emergency blackout) At this time, the UPS will immed...
Claims
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IPC IPC(8): H02J9/06G06F1/30
CPCG06F1/30H02J9/061
Inventor 李松磊滕学军张洪镇肖波高鹏飞
Owner GUANGDONG INSPUR BIG DATA RES CO LTD