CN201374571Y

CN201374571Y - Online UPS

Info

Publication number: CN201374571Y
Application number: CN200820182536U
Authority: CN
Inventors: 丁海; 徐建明
Original assignee: BEIJING ZHONGCHUANG RUIPU TECHNOLOGY Co Ltd
Current assignee: BEIJING ZHONGCHUANG RUIPU TECHNOLOGY Co Ltd
Priority date: 2008-12-29
Filing date: 2008-12-29
Publication date: 2009-12-30
Anticipated expiration: 2018-12-29

Abstract

The utility model relates to an online UPS which comprises a casing, a circuit board and a storage battery. A main power supply circuit is arranged on the circuit board, and consists of an input unit, an input filtering unit, a rectifying unit, an inverter unit, an output isolating unit, an output filtering unit, a bypass switching unit and an output unit which are connected in sequence; a secondary power supply circuit is also arranged on the circuit board, and consists of a bypass input unit and a bypass switching unit which are connected in sequence; the main power supply circuit and the secondary power supply circuit switch and supply power through the bypass switching unit; the bypass switching unit is in control connection with a protection and control unit through a feedback unit; the rectifying unit, the inverter unit and the bypass switching unit are respectively in control connection with the protection and control unit; and the rectifying unit carries out power supply connection with the storage battery through a charging unit. The utility model is suitable for emergency power supplies; the switching time of the UPS is 0mS; and both the three-phase unbalanced load bearing capacity and the non-linear load bearing capacity are better.

Description

Online UPS

Technical field

The utility model relates to a kind of online uninterrupted power supply (ups) Unity, and it is a kind of alternating current-direct current dual input, the supply unit that exchanges output, is widely used in fields such as computer system, mobile communication system, telecommunication system, network system, banking system.

Background technology

During common UPS operate as normal civil power is become direct current through over commutation, in parallel with the direct voltage of storage battery, again through the stable alternating current powering load of inversion output.When direct current has fault or inversion unit that fault is arranged, automatically switch to bypass, directly power for load by civil power; Perhaps, need be outputted to inversion output by bypass when direct current or the eliminating of inversion unit fault.This switching is generally finished by contactor, because the action of contactor needs the time, this load when causing switching has the problem of instant cut-off.

In addition, the control mode of common UPS three-phase inversion is a phase of only controlling in the three-phase, other two-phase is designed to respectively differ 120 degree phase angles mutually automatically with this on hardware, the benefit of doing like this is that control is simple, only need to follow the tracks of frequency, voltage and the phase place of electricity mutually, keep same mutually synchronous of it and civil power.The result who does like this is when three-phase imbalance load or nonlinear load are heavier, can't regulate a certain phase wherein separately.Even at this moment the electric current of two-phase is very little in addition, because this phase current has surpassed rated value, equipment will forward bypass power supply to, and this just causes the load capacity of equipment to reduce greatly.

The utility model content

The purpose of this utility model is in order to address the above problem, to propose a kind of online UPS, and this UPS switching time is 0mS, and three-phase imbalance load load capacity and nonlinear load load capacity are all relatively good.

The purpose of this utility model is achieved through the following technical solutions: online UPS; be provided with housing; circuit board; storage battery; it is characterized in that: described circuit board is provided with by input unit; the input filter unit; rectification unit; inversion unit; the output isolated location; the output filter unit; the bypass switch unit; the mains supply line that output unit connects to form successively; also be provided with on the described circuit board by the bypass input unit; the inferior supply line that the bypass switch unit connects to form successively; mains supply line switches power supply with time supply line by the bypass switch unit; the bypass switch unit is by feedback unit and protection control unit control connection; rectification unit; inversion unit; the bypass switch unit respectively with protection control unit control connection, described rectification unit is connected with storage battery power supply by charhing unit.

The execution mode that the utility model further improves and replenishes:

Described protection control unit is connected with the communication unit data by telecommunication cable.

Described protection control unit is connected with complete machine monitoring display data by data wire.

The bypass switch unit of UPS of the present utility model is static switch in parallel at original diverter switch two ends; the conducting of static switch and the CPU that ends by protection and control unit control; when needs are outputted to bypass output from inversion; perhaps need to be outputted to inversion when output from bypass; at first make the static switch conducting; connect or disconnect diverter switch then; after judging that diverter switch has successfully been moved; through certain time-delay; disconnect static switch again; so just can guarantee to be outputted to bypass output from inversion; perhaps be outputted to inversion when output from bypass; the power-off time of load is 0mS; thoroughly solve action owing to diverter switch and need the load instant cut-off problem that the time causes; control for inversion; the mode that we take is that three-phase inversion is independently controlled; be that the three-phase inversion loop works alone; there is not inevitable dependence mutually; the triggering signal of three-phase inversion neither a control signal; but three control signals; like this when above-mentioned situation occurring; control unit can be adjusted the output voltage of that heavier phase of unbalanced load or nonlinear load automatically; thereby improve the load capacity of this phase, make entire equipment keep steady operation.

Description of drawings

Fig. 1 is online UPS schematic diagram;

Fig. 2 is a bypass switch unit schematic diagram;

Fig. 3 is an inversion unit three-phase independent regulation schematic diagram.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment 1: referring to accompanying drawing; online UPS; be provided with housing; circuit board; storage battery; described circuit board is provided with by input unit; the input filter unit; rectification unit; inversion unit; the output isolated location; the output filter unit; the bypass switch unit; the mains supply line that output unit connects to form successively; also be provided with on the described circuit board by the bypass input unit; the inferior supply line that the bypass switch unit connects to form successively; mains supply line switches power supply with time supply line by the bypass switch unit; the bypass switch unit is by feedback unit and protection control unit control connection; rectification unit; inversion unit; the bypass switch unit respectively with protection control unit control connection; described rectification unit is connected with storage battery power supply by charhing unit; described protection control unit is connected with the communication unit data by telecommunication cable; described protection control unit is connected with complete machine monitoring display cell data by data wire; described input unit adopts air switch; described input filter unit adopts filter; described rectification unit adopts controllable silicon; described charhing unit adopts charger; described inversion unit adopts IGBT; described output filter unit adopts filter; described output unit adopts air switch; described bypass input unit adopts air switch; described bypass switch unit adopts contactor; described feedback unit adopts instrument transformer; described protection and control unit adopt CPU; described complete machine monitoring display unit adopts LCD, and described communication unit adopts 232 interfaces.

Claims

1; a kind of online UPS; be provided with housing; circuit board; storage battery; it is characterized in that: described circuit board is provided with by input unit; the input filter unit; rectification unit; inversion unit; the output isolated location; the output filter unit; the bypass switch unit; the mains supply line that output unit connects to form successively; also be provided with on the described circuit board by the bypass input unit; the inferior supply line that the bypass switch unit connects to form successively; mains supply line switches power supply with time supply line by the bypass switch unit; the bypass switch unit is by feedback unit and protection control unit control connection; rectification unit; inversion unit; the bypass switch unit respectively with protection control unit control connection, described rectification unit is connected with storage battery power supply by charhing unit.

2, online UPS according to claim 1 is characterized in that: described protection control unit is connected with the communication unit data by telecommunication cable.

3, online UPS according to claim 1 is characterized in that: described protection control unit is connected with complete machine monitoring display cell data by data wire.