CN2378870Y - On-line interdynamic uninterruption power source - Google Patents

Abstract

The utility model discloses an on-line interactive uninterrupted power source. A charger and an inverter are integrally combined and designed into a bidirectional transducer. The invertor can work all the time in a mains supply state or an inverted state. In the mains supply state, input can be sent to load after filtering processing and voltage regulation, and simultaneously, the bidirectional transducer is defined as the charger through a control loop for charging a battery. The leakage inductance of an output transformer is used as greater filter inductance, and the output transformer and an output capacitor are formed into a good filter. The utility model has better filtering effect, and can satisfy the requirements of precision instruments for voltage quality.

Description

Online interaction formula uninterrupted power supply

The utility model relates to a kind of uninterrupted power supply.

Uninterrupted power supply (ups) Unity is used for providing uninterrupted AC power to alternating current equipment, and it has the function of an aspect, two sides: promptly: a. improves power quality b. provides back-up source.

Press the working method of UPS, usually UPS has two kinds of backup type and on line type UPSs.Their operation principle is respectively:

A. off-line UPS: in civil power was in normal range (NR), the output of UPS was to be supplied with after voltage stabilizing, simple filtering by the input civil power.Simultaneously, charger is to battery charge, and inversion circuit is in resting state.Have only when city's electrical anomaly, just start inversion circuit, the energy content of battery is converted to alternating current for load.There is following defective:

1, charger and inverter separately use, and cause the waste of resource.

2, it is undesirable the treatment effect of anti-interference filtration to be carried out in input, and the instrument that power grid quality is had relatively high expectations should not use.

B. on line type UPS: in civil power is in normal range (NR), is a direct current power supply and cell voltage parallel connection with the input AC electricity through rectification, convert DC power supply to stable alternating current for load through inverter again, in case during city's electrical anomaly, just continue to provide AC power by battery for inverter, output does not have power-off time when not having city's electrical anomaly, simultaneously, because its output is provided by inverter all the time, interference free performance is stronger.But, have the following disadvantages from working forms:

1, the input civil power passes to load end needs through Two Stages, and power supplying efficiency is low, the complete machine temperature rise.On line type UPS at first will be imported civil power through being rectified into direct voltage, and supply inverter in parallel with cell voltage uses.Inverter transmits direct voltage after capacitor filtering becomes a stable alternating voltage supply load through switch copped wave, transformer, lost a part of energy in rectification and inverter work, this part energy is converted to heat energy, therefore, the efficient of city's electrical transmission is low, and the heat energy that produces makes the complete machine temperature rise, has influenced the useful life of components and parts, has also influenced the reliability of complete machine.Simultaneously, the ageing process temperature influence of battery is bigger, and detailed test shows, 5 ℃ of the every risings of temperature, and the life-span of battery will descend 10%.Therefore, the temperature rise of complete machine will influence the life-span of battery.

When 2, line voltage is low, the voltage after its rectification will be not enough to provide the energy requirement of load end, be every index of protection on line type UPS; battery will drop into discharge, like this, and in the whole service process of UPS; battery frequently discharges, and will shorten the actual life of battery.

3, the power transfer of on line type UPS causes the machine line complexity through conversion repeatedly, and whole cost is higher, increases user's burden.

The purpose of utility model is to provide a kind of good wave filtering effect, strong interference immunity, operational efficiency height; The low battery life of complete machine temperature rise is long; Inverter and charger unite two into one, and reduce the wasting of resources, reduce the online interaction formula uninterrupted power supply of complete machine cost, to overcome above-mentioned defective.

The online interaction formula uninterrupted power supply that the utility model proposes, it comprises the main transformer of civil power major loop, the load output winding T2 of main transformer also meets output capacitance C, can form a high-quality LC filter circuit by main transformer self leakage inductance L and output capacitance C; The secondary winding T3 of main transformer and battery are connected with the inverter bridge power tube respectively, inversion drives the output that drives with charging and is connected with the input of logic control element respectively, the selection control signal end of master control chip CPU is connected with the control input end of logic control element, the gating switch output of logic control element is connected with the input of driving control unit, and the gating switch output of driving control unit links to each other with the drive end of inverter bridge power tube.

Because the utility model unites two into one charger and inverter, is designed to reversible transducer.At city's electricity condition or in the inversion attitude, inverter is work all the time.At city's electricity condition, will import after Filtering Processing and voltage stabilizing and deliver to load, simultaneously, be set to charger by the control loop reversible transducer, battery is charged.Utilize the output transformer leakage inductance as bigger filter inductance, form a good filter, have filter effect preferably, satisfy the requirement of precision instrument quality of voltage with output capacitance.

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

Fig. 1 is a present embodiment civil power major loop schematic diagram.

Fig. 2 is the schematic circuit of present embodiment two-way changing.

Fig. 3 present embodiment charging loop sketch that boosts.

The main transformer of tradition UPS output loop is just done energy delivery, does not play the effect of filtering, improve the output filter capacity, just needs to increase bigger filter inductance.With reference to Fig. 1, online interaction formula UPS further improves main transformer in design, and main transformer self leakage inductance is fully utilized, and forms a high-quality LC filter circuit by leakage inductance L and output capacitance C4.

With reference to Fig. 2, form an inverter bridge power tube by the Q1-Q4 power field effect pipe, D1-Q4 is respectively the built-in body protection diode of Q1-Q4.Sine wave signal and triangular signal are given the inversion driving after relatively, inversion drives and charging drives 2P, 6P and the 3P that delivers to FPGA (Field Programmable Gate Array) control unit U10 respectively, the selection control signal of being sent by CPU master control chip is delivered to the 1P of U10, and logic control element is as the gating switch of controlling and driving signal; Driving control unit U12 makes the enhancing amplification of drive signal, and the signal that U10 is sent amplifies rear drive power device Q1-Q4; CPU changes and the internal logic relational expression by the level of control U10-1P, the output signal of U10 can be gated for inversion drive signal or charging drive signal.When city's electrical anomaly or other status command make machine be in inverter mode; the 1P of U10 is a low level; U12 is output as inversion and drives output; as shown in Figure 2; converter is a full-bridge circuit, by the inversion drive signal to the conducting of power tube by control, battery current flows through transformer T to Q4 and electric current flows through transformer to Q3 from Q2 through Q1; so the circulation conducting ends, and just induces sine wave at transformer secondary output and delivers to output.

When civil power just often, civil power exports load (shown in Fig. 1 circuit) to after transformer T voltage stabilizing, simultaneously, induce a sinusoidal voltage at main transformer secondary winding T3; We regard this alternating voltage as a voltage source Ui=UmSinwt; This moment, the 1P of main control CPU chip controls U10 was a high level, and U12 is output as the charging drive signal, and Q3, Q4 are done drive controlling and Q1, Q2 are ended; utilize Q1 simultaneously; the protection diode D of Q2 and the leakage inductance L of transformer, can obtain circuit as shown in Figure 3: Q is switching tube, L is the leakage inductance of transformer; energy storage inductor boosts; D is Q1, and the protection diode of Q2 is as rectifier diode; this circuit is a typical B oost booster circuit, and its relational expression is: Uo=Ui/ δ.Wherein δ is the angle of flow duty ratio of Q, Ui=UmSinwt, and when controlling the conducting rule of δ, the promptly feasible direct voltage that obtains voltage stabilizing, input power factor pf＞more than 0.96.Electrical network is not caused added burden.Simultaneously, the power headroom of reversible transducer is big, and bigger charging current can be provided, and has higher reliability.

Claims (1)

1, a kind of online interaction formula uninterrupted power supply, it comprises the main transformer of civil power major loop, it is characterized in that: the load output winding T2 of main transformer also meets output capacitance C, the secondary winding T3 of main transformer and battery are connected with the inverter bridge power tube respectively, inversion drives the output that drives with charging and is connected with the input of logic control element respectively, the selection control signal end of master control chip CPU is connected with the control input end of logic control element, the gating switch output of logic control element is connected with the input of driving control unit, and the gating switch output of driving control unit links to each other with the drive end of inverter bridge power tube.

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