Unlock instant, AI-driven research and patent intelligence for your innovation.

Uninterrupted power supply

A technology of power supply and capacitor, which is applied in the field of uninterruptible power supply, can solve the problems of difficult to increase power, high comprehensive cost, and difficult to increase inverter efficiency, and achieve the effect of simple control and cost reduction

Active Publication Date: 2013-03-20
VERTIV CORP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this structure, the inverter part has obvious disadvantages due to the two levels: the voltage stress of the switching tube is relatively large, and a tube with high withstand voltage must be used; the inductance of the inverter is large, and the inverter efficiency is difficult to increase
Coupled with factors such as radiators, the overall cost is relatively high
However, because the charger uses an isolated converter, it is difficult to increase the power. If a high-power charger is required, multiple parallel connections are required, and the cost rises sharply.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Uninterrupted power supply
  • Uninterrupted power supply

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0016] Such as figure 1 As shown, an uninterruptible power supply, including power factor correction (Power Factor

[0017] Correction, referred to as PFC) device, charger, secondary battery (BATTERY), inverter. The charger charges the secondary battery, the inverter has a three-level structure, and is used to invert the DC bus voltage into an AC voltage, and the power factor corrector rectifies the mains power into an AC voltage when the mains power is normal. The DC voltage is added to the DC bus to charge the charger, and the voltage on the battery is boosted to the DC bus when the mains power is abnormal. The input power of the charger of the present invention is obtained from a power factor corrector.

[0018] Such as figure 1 As shown, the power factor corrector includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first capacitor C1, a second capacitor C2, a first The switching tube Q1, the second switching tube Q2 and the first induct...

specific Embodiment approach 2

[0029] Such as figure 2 As shown, the difference between this embodiment and Embodiment 1 lies in the connection method of the charger. In this embodiment, the secondary battery is connected to the cathode of D1. The specific structure is: the charger includes a first switch S1, a third capacitor C3, and a BUCK converter. The first switch S1 is connected to the third capacitor C3 and connected across the first end of the first switch tube Q1 and the first end of the second switch tube Q2, and the BUCK converter is coupled between the third capacitor C3 and the secondary between batteries. The BUCK converter includes a third switching tube Q3, a second inductor L2, a fourth capacitor C4, and a fifth diode D5; the second end of the third switching tube Q3 is connected to the first end of the third capacitor C3, so The first end of the third switching tube Q3 is connected to the anode of the fifth diode D5, the cathode of the fifth diode D5 is connected to the second end of th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a uninterrupted power supply and the power supply comprises a power factor corrector, a charger, a secondary battery and a inverter, wherein the charger is used to charge the secondary battery; the inverter has a tri-level structure and is used to invert DC bus voltage to AC voltage; the power factor corrector rectifies commercial electricity to DC voltage to load on DC busand charges the charger when commercial electricity is in normal state and when commercial electricity is abnormal, the power factor corrector boosts the voltage of the battery to DC bus. The chargerof UPS of the invention is not isolated, the control is easy, and larger power can be easily realized. The uninterrupted power supply of the invention cancels the isolating transformer used in the prior art so as to reduce the cost of UPS, particularly the cost of high-power UPS.

Description

technical field [0001] The invention relates to an uninterruptible power supply (UPS for short). Background technique [0002] Most of the existing single-phase UPSs in the small and medium power range have a multi-topological single-phase Vienna rectifier plus a two-level inverter structure, and the charger uses an isolation converter. In this structure, the inverter part has obvious disadvantages due to the two levels: the voltage stress of the switching tube is relatively large, and a tube with high withstand voltage must be used; the inductance of the inverter is large, and the inverter efficiency is difficult to increase . Coupled with factors such as radiators, the overall cost is relatively high. However, because the charger uses an isolated converter, it is difficult to increase the power. If a high-power charger is required, multiple parallel connections are required, and the cost rises sharply. Contents of the invention [0003] The technical problem to be sol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02M1/42H02J7/02H02M7/48H02J9/04
CPCY02B70/126Y02B70/10Y02P80/10
Inventor 周原邴阳肖学礼
Owner VERTIV CORP