CN1567671A - Electric supply recovery self-starting device of UPS system - Google Patents

Abstract

The invention discloses an AC UPS system city electricity return self-starting device, including a city electricity return detecting unit, a starting unit, an auxiliary power supply control unit, a UPS control unit, and a battery power supply unit, using a beneficial condition that UPS discharges too lowly in battery working mode and shuts down for self-protection and a power-on panel switch of the starting unit is always closed, and at the same time, solving the problem that the original starting loop can not be switched on because the capacitor is full of voltage, as the city electricity returns, it builds up a UPS auxiliary power supply through the other loop, thus overcoming the defects that the self-starting device has complicated circuit, large bulk and is not suitable for USP self-starting in existing technique, and uses a simple circuit combination to realize the UPS self-starting after the city electricity returns.

Description

Uninterruptible power system city power recovery self-starting device

Technical field

The present invention relates to the ac uninterrupted power supply system, relate in particular to a kind of system that is used for city power recovery uninterruptible power system (UPS, Uninterruptible Power System) self-starting just often.

Background technology

Under the promotion of computer network and communication network fast development, the demand of intelligent UPS is also increased sharply.When carrying because of civil power in running, UPS breaks down or when interrupting because of other reasons; the batteries of UPS is born the work to inverter power supply immediately; prolongation along with the operating time; the terminal voltage of batteries will descend gradually; when this terminal voltage drops to cell voltage and crosses low valve valve; for preventing that batteries from damaging because of over-discharge can, UPS will cross low protective circuit by cell voltage inverter will be placed off-mode.Be the reduction cost of human resources, in case ups power city power recovery self-starting again after the self-shield shutdown, and do not need artificial operation.

Self-starting device commonly used at present, be mainly used in the self-starting of motor, by a large amount of relays and monostable flipflop loop of power circuit is controlled, the circuit complexity, volume is big, and is mainly used in the self-starting of motor, and what electric motor starting adopted is A.C. contactor, and UPS needs the direct-flow storage battery group or the AC power rectification is handled back and battery parallel connection together as the backup power supply unit of accessory power supply, so self-starting device of the prior art is not suitable for UPS.

Summary of the invention

The objective of the invention is to overcome the self-starting device circuit complexity that exists in the prior art, volume is big and is not suitable for the shortcoming of UPS self-starting; a kind of self-starting device is provided, makes UPS after the low self-shield shutdown of discharging under the battery operated pattern, run into city power recovery energy self-starting because of civil power is undesired.

For achieving the above object, the present invention has constructed a kind of uninterruptible power system city power recovery self-starting device, comprise the accessory power supply control unit, the UPS control unit, battery power supply unit, it is characterized in that, also comprise the city power recovery detecting unit, start unit, described battery power supply unit is powered to described start unit and described accessory power supply control unit under the UPS battery mode of operation, described accessory power supply control unit is set up stable accessory power supply and feedback power, and feedback power is recycled to described start unit, described UPS control unit is controlled whole UPS by described accessory power supply control unit; UPS because of described battery power supply unit voltage decline self-shield shutdown after, in case the city power recovery, described city power recovery detecting unit receives the city power recovery signal, and converts thereof into the low pressure square-wave signal by light-coupled isolation, imports described start unit; Described start unit receives this city power recovery low pressure square-wave signal, and converts thereof in a flash pulse signal and import described accessory power supply control unit, sets up accessory power supply.

The present invention utilizes UPS after the low self-shield shutdown of discharging under the battery operated pattern; the closure panel switch that powers on of start unit is closed always; cell voltage still is added in the advantage on the start unit major loop; solve former startup loop simultaneously since wherein the voltage of electric capacity be full of and problem that can not conducting; when the city power recovery; set up the accessory power supply of UPS by another loop; realize self-starting behind the UPS city power recovery with simple combination of circuits, thereby overcome the self-starting device circuit complexity that exists in the prior art; and be not suitable for the shortcoming of UPS self-starting.

Description of drawings

Fig. 1 is a UPS of the present invention city power recovery self-starting device structure chart.

Fig. 2 is a UPS of the present invention city power recovery self-starting device circuit diagram.

Embodiment

The present invention is described further below in conjunction with accompanying drawing.

Fig. 1 is a UPS of the present invention city power recovery self-starting device structure chart, described UPS city power recovery self-starting device, comprise accessory power supply control unit 103, UPS control unit 104, battery power supply unit 105, it is characterized in that, also comprise city power recovery detecting unit 101, start unit 102, described battery power supply unit 105 is powered to described start unit 102 and described accessory power supply control unit 103 under the UPS battery mode of operation, described accessory power supply control unit 103 is set up stable accessory power supply and feedback power, and feedback power is recycled to described start unit 102, described UPS control unit 104 is by the whole UPS of described accessory power supply control unit 103 controls; Ups power because of described battery power supply unit 105 voltage decline self-shields shutdown after, in case city power recovery, described city power recovery detecting unit 101 receives the city power recovery signal, and converts thereof into the low pressure square-wave signal by light-coupled isolation, imports described start unit 102; Described start unit 102 receives these city power recovery low pressure square-wave signals, and converts thereof in a flash pulse signal and import described accessory power supply control unit 103, sets up accessory power supply.

UPS adopts battery operated pattern when civil power is undesired; battery power supply unit 105 discharged after the low self-shield shutdown; the closure panel switch that powers in the start unit 102 is closed always; cell voltage also is added on the major loop of start unit 102; the present invention solved former startup loop simultaneously since wherein the voltage of electric capacity be full of and problem that can not conducting; play the UPS accessory power supply through another path setting, UPS restarts work according to the preceding stored information of UPS control unit 104 shutdown.

Fig. 2 is a UPS of the present invention city power recovery self-starting device circuit diagram.When civil power is undesired, UPS is under the battery operated pattern, battery power supply unit 105 is powered to accessory power supply control unit 103 by start unit 102, described start unit 102 comprises the closure panel switch S 1 that powers on, resistance R 4, resistance R S, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14, capacitor C 2, capacitor C 3, diode VD2, diode VD3, diode VD4, NPN type triode VT1 and positive-negative-positive triode VT2, the described described battery power supply unit 105 of closure panel switch S 1 one terminations that powers on, described resistance R 4 of another termination and described resistance R 8, the other end of described resistance R 8 links to each other with an end of described resistance R 13, the other end of described resistance R 13 connects described resistance R 9 simultaneously, the emitter of described resistance R 14 and described triode VT2, and the negative electrode that passes through diode VD6 links to each other with the feedback power of described accessory power supply control unit 103, the other end ground connection of described resistance R 14, the other end of described resistance R 9 connects the base stage of described triode VT2, and be connected with the collector electrode of described triode VT1 by described resistance R 11, the collector electrode of described triode VT2 connects described accessory power supply control unit 103, described resistance R 10 and 12 series connection of described resistance R, the other end of described resistance R 10 is connected with described accessory power supply control unit 103 by described diode VD5; Described resistance R 4 is connected with the end of described optocoupler D1, described resistance R S, and connect the base stage of described triode VT1 by described capacitor C 1, described diode VD2, described diode VD2 connects resistance R 6 simultaneously, the emitter of described resistance R 5, described resistance R 6, described resistance R 12 and described triode VT1 ground connection in parallel; Described optocoupler D1 also connects the base stage of described triode VT1 by described capacitor C 2, described diode VD3, described resistance R 7 one ends connect described capacitor C 2, the other end connects anode and the ground connection of described diode VD3, and the negative electrode of described diode VD3 connects another pole plate of described capacitor C 2.

Battery power supply unit 105 has two by start unit 102 to the path of accessory power supply control unit 103 power supplies, leading up to resistance R 4, capacitor C 1, diode VD2 gives base stage one pulse signal of triode VT1, triode VT1 conducting, thereby make also conducting of triode VT2, set up accessory power supply, simultaneously, by producing feedback power 106 from winding, another road accessory power supply set up and operate as normal after feedback power voltage is added to the E utmost point of triode VT2 by resistance R 10.When capacitor C 1 charging is finished, battery power supply unit 105 can not be powered to start unit 102 by former startup loop again, and replace it to give start unit 102 power supplies by resistance R 10 and diode VD5 by feedback power 106, make accessory power supply control unit 103 obtain power supply.Wherein, the selection of resistance R 4, resistance R 5, resistance R 6 and capacitor C 1 will be satisfied the requirement of triode VT1 operating voltage range, resistance R 5, resistance R 6 are the discharge loop resistance of capacitor C 1, the value of resistance R 4, resistance R 5, resistance R 6 is chosen according to the voltage of UPS storage battery, if represent the resistance in parallel of resistance R 5, R6 with R, promptly $R=\frac{R5\×R6}{R5\×R6},$ Vbat represents cell voltage, then has $\frac{R}{R+R4}\·\mathrm{Vbat}\≥(1+0.7)V,$ Capacitor C 1 value be 47uF to 200uF, therefore, be 274VDC if select cell voltage, then desirable resistance R 4=240k, resistance R 5=4.7k, resistance R 6=22k, electrochemical capacitor C1=100uF/35V, promptly the capacity of C1 is got 100uF, rated voltage is 35V; Equally, the selection of resistance R 8, resistance R 13 and resistance R 14 will be satisfied the requirement of triode VT2 operating voltage range, promptly has $\frac{R14}{R8+R13+R14}\·\mathrm{Vbat}\≥18V,$ Therefore, desirable resistance R 8=24k in the practical operation, resistance R 13=10k, resistance R 14=8.2k; The selection of resistance R 7, capacitor C 2 also will be satisfied the requirement of VT1 operating voltage range, establishes R ₀Be the resistance after three resistance R 7, R5, the R6 parallel connection, Vbat represents cell voltage, then has $\frac{R_0}{R_0+R4}\·\mathrm{Vbat}\≥(1+0.7)V,$ Capacitor C 2 values be 47uF to 200uF, in the practice, power taking resistance R7=68k, electrochemical capacitor C2=100uF/35V, promptly the capacity of C2 is got 100uF, rated voltage is 35V.

Prolongation along with the UPS batteries operating time; the terminal voltage of batteries will descend gradually; when this terminal voltage drops to cell voltage and crosses low valve valve; damage because of over-discharge can for preventing batteries; UPS will cross low protective circuit by cell voltage and shut down automatically; at UPS control unit 104 after accessory power supply control unit 103 sends the self-shield off signal; accessory power supply turn-offs pulse and with whole ups power system closing; the closure panel switch S 1 that powers in the start unit 102 of shutdown back is still closed; but because capacitor C 1 has been charged before shutdown and has been finished; and voltage can not descend along with the UPS shutdown between its two-plate; when the city power recovery, power supply can not be powered to accessory power supply control unit 103 through start unit 102 by former startup path again.At this moment, civil power positive half wave voltage makes the optocoupler D1 conducting of city power recovery detecting unit 101, give base stage one pulse signal of triode VT1 by resistance R 4, optocoupler D1, capacitor C 2, diode VD3, thereby make accessory power supply control unit 103 obtain power supply power supply, system restart.Described city power recovery detecting unit 101 also comprises resistance R 1, resistance R 2, resistance R 3 and diode VD1 except that comprising optocoupler D1, described resistance R 1, resistance R 2, resistance R 3 are connected successively, another termination power of described resistance R 1, the negative electrode of the described diode VD1 of another termination of described resistance R 3, the plus earth of described diode VD1, negative electrode and anode that the anode of the former limit of described optocoupler D1 light-emitting diode and negative electrode meet described diode VD1 respectively.The selection of resistance R 1, resistance R 2 and resistance R 3 will be satisfied the requirement of the current margin of optocoupler D1, if represent minimum civil power input service voltage with Uin, then has $\frac{\mathrm{Uin}}{R1+R2+R3}\≥1\mathrm{mA},$ In the practical operation, power taking resistance R1=51k, resistance R 2=51k, resistance R 3=51k, diode VD1 is for preventing connecing anti-diode.

UPS of the present invention city power recovery self-starting device is by 1 optocoupler, the combination of 4 diodes, 2 electric capacity, 2 triodes and some resistance has not only realized the city power recovery self-starting function, has also realized functions such as shutdown control, control circuit is simple, and is multiple functional.

Claims (7)

1, a kind of uninterruptible power system city power recovery self-starting device, comprise accessory power supply control unit (103), UPS control unit (104), battery power supply unit (105), it is characterized in that, also comprise city power recovery detecting unit (101), start unit (102), described battery power supply unit (105) is powered to described start unit (102) and described accessory power supply control unit (103) under the UPS battery mode of operation, described accessory power supply control unit (103) is set up stable accessory power supply and feedback power, and feedback power is recycled to described start unit (102), described UPS control unit (104) is controlled whole UPS by described accessory power supply control unit (103); Ups power is because of after described battery power supply unit (105) the voltage decline self-shield shutdown, in case city power recovery, described city power recovery detecting unit (101) receives the city power recovery signal, and converts thereof into the low pressure square-wave signal by light-coupled isolation, imports described start unit (102); Described start unit (102) receives this city power recovery low pressure square-wave signal, and converts thereof in a flash pulse signal and import described accessory power supply control unit (103), sets up accessory power supply.

2, uninterruptible power system according to claim 1 city power recovery self-starting device, it is characterized in that, described city power recovery detecting unit (101) comprises resistance R 1, resistance R 2, resistance R 3, diode VD1 and optocoupler D1, described resistance R 1, resistance R 2, resistance R 3 are connected successively, another termination power of described resistance R 1, the negative electrode of the described diode VD1 of another termination of described resistance R 3, the plus earth of described diode VD1, negative electrode and anode that the former limit light-emitting diodes tube anode of described optocoupler D1 and negative electrode meet described diode VD1 respectively.

3, uninterruptible power system according to claim 2 city power recovery self-starting device is characterized in that the selection of resistance R 1, resistance R 2 and resistance R 3 will be satisfied the requirement of the current margin of optocoupler D1, promptly $\frac{\mathrm{Uin}}{R1+R2+R3}\≥1\mathrm{mA},$ Wherein, Uin represents minimum civil power input service voltage, and described diode VD1 is for preventing connecing anti-diode.

4, uninterruptible power system according to claim 2 city power recovery self-starting device is characterized in that the described resistance R 2=51k of described resistance R 1=51k, described resistance R 3=51k.

5, uninterruptible power system according to claim 1 city power recovery self-starting device, it is characterized in that, described start unit (102) comprises the closure panel switch S 1 that powers on, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14, capacitor C 2, capacitor C 3, diode VD2, diode VD3, diode VD4, triode VT1 and triode VT2, the described closure panel switch S 1 that powers on, the described battery power supply unit of one termination (105), described resistance R 4 of another termination and described resistance R 8, the other end of described resistance R 8 links to each other with an end of described resistance R 13, the other end of described resistance R 13 connects described resistance R 9 simultaneously, the emitter of described resistance R 14 and described triode VT2, and the negative electrode that passes through diode VD6 links to each other with the feedback power of described accessory power supply control unit (103), the other end ground connection of described resistance R 14, the other end of described resistance R 9 connects the base stage of described triode VT2, and be connected with the collector electrode of described triode VT1 by described resistance R 11, the collector electrode of described triode VT2 connects described accessory power supply control unit (103), described resistance R 10 and 12 series connection of described resistance R, the other end of described resistance R 10 is connected with described accessory power supply control unit (103) by described diode VD5;

Described resistance R 4 is connected with an end of the former limit of described optocoupler D1 light-emitting diode, described resistance R 5, and connect the base stage of described triode VT1 by described capacitor C 1, described diode VD2, described diode VD2 connects resistance R 6 simultaneously, the emitter of described resistance R 5, described resistance R 6, described resistance R 12 and described triode VT1 ground connection in parallel;

The former limit light-emitting diode of described optocoupler D1 also connects the base stage of described triode VT1 by described capacitor C 2, described diode VD3, described resistance R 7 one ends connect described capacitor C 2, the other end connects anode and the ground connection of described diode VD3, and the negative electrode of described diode VD3 connects another pole plate of described capacitor C 2.

6, uninterruptible power system according to claim 5 city power recovery self-starting device, it is characterized in that, described triode VT1 is the NPN type, described triode VT2 is a positive-negative-positive, the selection of described resistance R 4, resistance R 5, resistance R 6 and capacitor C 1 will be satisfied the requirement of described triode VT1 operating voltage range, promptly $\frac{R}{R+R4}\·\mathrm{Vbat}\≥0.7V,$ Wherein, R represents the resistance in parallel of resistance R 5, R6, promptly $R=\frac{R5\×R6}{R5+R6},$ Vbat is a cell voltage, and described capacitor C 1 span is 47uF～200uF; The selection of described resistance R 8, resistance R 13 and resistance R 14 will be satisfied the requirement of described triode VT2 operating voltage range, promptly $\frac{R14}{R8+R13+R14}\·\mathrm{Vbat}\≥18V;$ Described capacitor C 2 values be 47uF to 200uF, the selection of described resistance R 7 also will be satisfied the requirement of described triode VT1 operating voltage range, promptly $\frac{R_0}{R_0+R4}\·\mathrm{Vbat}\≥(1+0.7)V,$ Wherein, Vbat is a cell voltage, resistance R ₀Be the resistance after described resistance R 7, resistance R 5,6 three resistance parallel connections of resistance R.

7, uninterruptible power system according to claim 6 city power recovery self-starting device is characterized in that described cell voltage Vbat is 274VDC, described resistance R 4=240k, described resistance R 5=4.7k, described resistance R 6=22k, described capacitor C 1 capacity is got 100uF, and rated voltage is 35V; Described resistance R 8=24k, described resistance R 13=10k, described resistance R 14=8.2k; Described resistance R 7=68k, described capacitor C 2 capacity are got 100uF, and rated voltage is 35V.