CN204216780U - A kind of DC bus soft start circuit of uninterrupted power supply - Google Patents
A kind of DC bus soft start circuit of uninterrupted power supply Download PDFInfo
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- CN204216780U CN204216780U CN201420680729.3U CN201420680729U CN204216780U CN 204216780 U CN204216780 U CN 204216780U CN 201420680729 U CN201420680729 U CN 201420680729U CN 204216780 U CN204216780 U CN 204216780U
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Abstract
A kind of DC bus soft start circuit of uninterrupted power supply, relate to soft starting circuit technical field, its circuit comprises field effect transistor drive circuit, thyristor driving circuit and current-limiting circuit, field effect transistor drive circuit comprises field effect transistor, thyristor driving circuit comprises thyristor, the controlled transient switching of field effect transistor, field effect transistor drive circuit is from battery electricity-taking, for thyristor driving circuit provides drive current, then turn on thyristors, thyristor driving circuit is from battery electricity-taking, by current-limiting circuit be bus capacitor charging, reach the object of soft start, above circuit structure is simple, applying flexible, applied widely, volume is little, cost is low, life-span is long and reliability is high.
Description
Technical field
The utility model relates to soft starting circuit technical field, particularly relates to a kind of DC bus soft start circuit of uninterrupted power supply.
Background technology
Uninterrupted power supply (ups) Unity has excellent performance and maintenance function easily, is day by day widely used in communication, network, industry control, finance and the field such as military.
Uninterrupted power supply has two input sources: civil power and battery, and when civil power is normal time, by civil power through UPS powering load, this is utility mode; When city's electrical anomaly time, by battery through UPS powering load, this is battery mode.
Uninterrupted power supply adopts dc-link capacitance mostly at the outlet side of rectification, because the initial voltage on dc-link capacitance is zero, the impulse current of very large moment can be formed in the moment of opening power device of powering on, particularly high power UPS, the multiple jumbo Capacitance parallel connection of general employing, the moment impact electric current formed is larger, and so large impulse current often causes input fuse to blow, and causes no-break power unit normally not run.In order to avoid the damage that excessive impulse current causes equipment, need to limit this impulse current by certain method, the voltage of dc-link capacitance is slowly raised, Here it is soft start.
Because uninterrupted power supply has utility mode and these two kinds of patterns of battery mode, therefore soft start also in two kinds of situation.Civil power start can realize soft start by the angle of flow of the thyristor controlling rectifier, and realize city's soft starting when not increasing any cost, this is a very practical method.Battery start then cannot make to realize soft start in this way, and several dc-link capacitance soft starting circuits of prior art are as follows:
1, power thermosensitive resistor and circuit is adopted---as shown in 3 in accompanying drawing 1, a series connection thermistor in the charge circuit of dc-link capacitance, utilize the negative temperature of thermistor hot, larger at circuit ON moment resistance R1, thus play the effect of restriction impulse current; When thermistor flows through larger current, because of heating, resistance diminishes thermistor, and circuit is in normal operating conditions.But this scheme can only be used for small-power occasion, is not suitable for large-power occasions.
2, current-limiting resistance relay circuit in parallel---as shown in 4 in accompanying drawing 2, a series connection current-limiting resistance in the charge circuit of dc-link capacitance, and relay and current-limiting resistance parallel connection, after circuit ON, relay is in off-state, and circuit is slowly charged to dc-link capacitance by current-limiting resistance; Charging terminates rear relay closes, and by current-limiting resistance short circuit, circuit is in normal operating conditions.But this scheme introduces high power relay, not only increases cost, also reduces reliability.
3, current-limiting resistance series relay circuit---as shown in 5 in accompanying drawing 3, a current-limiting circuit in parallel in the loop of battery to DC bus, this current-limiting circuit is composed in series by relay and current-limiting resistance, relay closes after circuit ON, circuit is slowly charged to dc-link capacitance by current-limiting resistance; Charging terminates rear relay and disconnects, and circuit is in normal operating conditions.This scheme is better than two schemes above, and application is at present also relatively wider, but the relay in this scheme can produce spark instantaneously at closed and disconnected, and the life and reliability of relay is lower, and its volume ratio is comparatively large, cost compare is high.
Summary of the invention
The purpose of this utility model be to avoid weak point of the prior art and provide that a kind of structure is simple, the DC bus soft start circuit of applying flexible, the uninterrupted power supply that applied widely, volume is little, cost is low, the life-span is long and reliability is high.
The purpose of this utility model is achieved through the following technical solutions:
A kind of DC bus soft start circuit of uninterrupted power supply is provided, be connected between battery module and dc-link capacitance module, battery module comprises battery, dc-link capacitance module comprises bus capacitor, in the utility model, comprise field effect transistor drive circuit, thyristor driving circuit and current-limiting circuit, described field effect transistor drive circuit comprises field effect transistor, described thyristor driving circuit comprises thyristor, the controlled transient switching of described field effect transistor, field effect transistor drive circuit is from battery electricity-taking, for thyristor driving circuit provides drive current, then turn on thyristors, thyristor driving circuit is from battery electricity-taking, by current-limiting circuit be bus capacitor charging.
Concrete, a kind of DC bus soft start circuit of uninterrupted power supply, described battery module comprises battery BAT1 and the cell switch K1 of serial connection, and described battery BAT1 comprises the positive pole BAT1+ of battery and the negative pole BAT-of battery, described dc-link capacitance module comprises DC bus anode BUS+, DC bus negative terminal BUS-and electrochemical capacitor C2, it is characterized in that: described field effect transistor is denoted as Q2, described field effect transistor drive circuit also comprises touch-switch K1, resistance R3, resistance R5, electric capacity C1, voltage stabilizing didoe D2, one end of described resistance R5 is connected with the positive pole BAT+ of described battery, the other end of described resistance R5 is connected with one end of touch-switch K1, the other end of described touch-switch K1 is connected with one end of electric capacity C1, the other end of described electric capacity C1 is connected with the anode BUS+ of DC bus, described voltage stabilizing didoe D2 is in parallel with described electric capacity C1, described resistance R3 is in parallel with described electric capacity C1,
The grid of described field effect transistor Q2 is connected with one end of described electric capacity C1, and the source electrode of described field effect transistor Q2 is connected with the other end of described electric capacity C1, and the drain electrode of described field effect transistor Q2 is connected with the positive pole BAT+ of described battery.
Concrete, described current-limiting circuit comprises resistance R4, and described resistance R4 is connected between the source electrode of described field effect transistor Q2 and DC bus anode BUS+.
Concrete, described thyristor driving circuit is connected between the source electrode of described field effect transistor Q2 and described resistance R4;
Described thyristor is denoted as Q1, described thyristor driving circuit also comprises resistance R1, resistance R2, the anode of described thyristor Q1 is connected with the positive pole BAT+ of described battery, the negative electrode of described thyristor Q1 is connected with one end of described resistance R4, the gate pole of described thyristor Q1 is connected with the source electrode of described field effect transistor Q2, between the gate pole that described resistance R2 is connected to described thyristor Q1 and negative electrode.
Described resistance R1 is connected between the positive pole BAT+ of described battery and the drain electrode of described field effect transistor Q2.
Concrete, be connected to diode D1 between the source electrode of described field effect transistor Q2 and the gate pole of described thyristor Q1, electric current during described diode D1 conducting flows to DC bus from battery.
The beneficial effects of the utility model: the DC bus soft start circuit of a kind of uninterrupted power supply of the present utility model, be connected between battery module and dc-link capacitance module, battery module comprises battery, dc-link capacitance module comprises bus capacitor, it comprises field effect transistor drive circuit, thyristor driving circuit and current-limiting circuit, described field effect transistor drive circuit comprises field effect transistor, described thyristor driving circuit comprises thyristor, the controlled transient switching of described field effect transistor, field effect transistor drive circuit is from battery electricity-taking, for thyristor driving circuit provides drive current, then turn on thyristors, thyristor driving circuit is from battery electricity-taking, by current-limiting circuit be bus capacitor charging, reach the object of soft start, above circuit structure is simple, detect without the need to extra CPU and control, without the need to external power source, an independently soft start circuit module can be made, not by the restriction of cpu resource, applying flexible, without the need to relay, can not spark be produced, can use in responsive occasion such as explosion-proof grade, applied widely, substitute the relay of prior art with thyristor, thus make that the volume of circuit is less, cost is lower, erection space can be reduced and increase economic efficiency, thyristor, for relay, has higher life and reliability.
Accompanying drawing explanation
Accompanying drawing is utilized to be described further utility model, but the embodiment in accompanying drawing does not form any restriction of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the following drawings.
Fig. 1 is the DC bus soft start circuit schematic diagram of the first uninterrupted power supply of prior art.
Fig. 2 is the DC bus soft start circuit schematic diagram of the second uninterrupted power supply of prior art.
Fig. 3 is the DC bus soft start circuit schematic diagram of the third uninterrupted power supply of prior art.
Fig. 4 is the DC bus soft start circuit schematic diagram of uninterrupted power supply of the present utility model.
Fig. 5 is the DC bus soft start circuit of uninterrupted power supply of the present utility model and the connection diagram of battery module and dc-link capacitance module.
Include in figure:
1---battery module;
2---dc-link capacitance module;
3---the DC bus soft start circuit schematic diagram of the first uninterrupted power supply of background technology;
4---the DC bus soft start circuit schematic diagram of the second uninterrupted power supply of background technology;
5---the DC bus soft start circuit schematic diagram of the third uninterrupted power supply of background technology;
6---the DC bus soft start circuit schematic diagram of uninterruptible power of the present utility model.
Embodiment
With the following Examples the utility model is further described.
The DC bus soft start circuit of a kind of uninterrupted power supply of the present embodiment is as shown in 6 in Fig. 4 and Fig. 5, as shown in Figure 5, be connected between battery module 1 and dc-link capacitance module 2, described battery module 1 comprises battery BAT1 and the cell switch K1 of serial connection, and described battery BAT1 comprises the positive pole BAT1+ of battery and the negative pole BAT-of battery, described dc-link capacitance module 2 comprises DC bus anode BUS+, DC bus negative terminal BUS-and electrochemical capacitor C2, in the present embodiment, described field effect transistor is denoted as Q2, described field effect transistor drive circuit also comprises touch-switch K1, resistance R3, resistance R5, electric capacity C1, voltage stabilizing didoe D2, one end of described resistance R5 is connected with the positive pole BAT+ of described battery, the other end of described resistance R5 is connected with one end of touch-switch K1, the other end of described touch-switch K1 is connected with one end of electric capacity C1, the other end of described electric capacity C1 is connected with the anode BUS+ of DC bus, described voltage stabilizing didoe D2 is in parallel with described electric capacity C1, described resistance R3 is in parallel with described electric capacity C1,
The grid of described field effect transistor Q2 is connected with one end of described electric capacity C1, and the source electrode of described field effect transistor Q2 is connected with the other end of described electric capacity C1, and the drain electrode of described field effect transistor Q2 is connected with the positive pole BAT+ of described battery.
Concrete, described current-limiting circuit comprises resistance R4, and described resistance R4 is connected between the source electrode of described field effect transistor Q2 and DC bus anode BUS+.
Concrete, described thyristor driving circuit is connected between the source electrode of described field effect transistor Q2 and described resistance R4;
Described thyristor is denoted as Q1, described thyristor driving circuit also comprises resistance R1, resistance R2, the anode of described thyristor Q1 is connected with the positive pole BAT+ of described battery, the negative electrode of described thyristor Q1 is connected with one end of described resistance R4, the gate pole of described thyristor Q1 is connected with the source electrode of described field effect transistor Q2, between the gate pole that described resistance R2 is connected to described thyristor Q1 and negative electrode.
Described resistance R1 is connected between the positive pole BAT+ of described battery and the drain electrode of described field effect transistor Q2.
Concrete, be connected to diode D1 between the source electrode of described field effect transistor Q2 and the gate pole of described thyristor Q1, electric current during described diode D1 conducting flows to DC bus from battery.
Its operation principle is as follows:
Field effect transistor Q2 and thyristor Q1 is in cut-off state under normal circumstances, and the effect of diode D1 prevents busbar voltage to be poured on battery higher than anti-during cell voltage.
After pressing touch-switch K1, cell voltage is superimposed upon on resistance R5, electric capacity C1, diode D1, resistance R2, resistance R4 and electric capacity C2, resistance R2 is thyristor pull down resistor, resistance R5 is that field effect transistor drives resistance, resistance R2, resistance R4 and resistance R5 play metering function, voltage on electric capacity C1 and electric capacity C2 slowly rises, after the voltage on electric capacity C1 reaches the conducting voltage of field effect transistor Q2, field effect transistor Q2 is open-minded, voltage stabilizing didoe D2 plays pressure stabilization function to electric capacity C1 both end voltage, prevents electric capacity C1 both end voltage too high thus punctures field effect transistor Q2.
After field effect transistor Q2 conducting, cell voltage is superimposed upon on resistance R1, field effect transistor Q2, diode D1, resistance R2, resistance R4 and electric capacity C2, and resistance R1 is that thyristor Q1 drives resistance, plays metering function, drive a current through resistance R1, field effect transistor Q2 and diode D1, thyristor Q1 conducting.
After thyristor Q1 conducting, cell voltage is superimposed upon on thyristor Q1, resistance R4 and electric capacity C2, and resistance R4 plays metering function, and the voltage on electric capacity C2 slowly rises, and finally close to cell voltage, thus realizes the object of soft start.
Even if after release touch-switch K1, field effect transistor Q2 cut-off, thyristor Q1 can not end at once, but by the time soft starting circuit charging current be zero or DC bus-bar voltage just can end higher than after cell voltage.
Described BAT+ and BUS+ is contained in but is not limited to the circuit structure that indicates in accompanying drawing 5.
Described charge circuit arises from the positive pole BAT+ of the battery of the battery module 1 of accompanying drawing 5, arrive the BAT+ of the DC bus soft start circuit of accompanying drawing 5, thyristor Q1, current-limiting resistance R4, DC bus anode BUS+ successively, then the negative terminal BUS-of the anode BUS+ of the dc-link capacitance module 2 of accompanying drawing 5, electric capacity C2, dc-link capacitance module 2 is arrived successively, at last the negative pole BAT-of the battery of the battery module 1 of accompanying drawing 5.
The DC bus soft start circuit of a kind of uninterrupted power supply of the present embodiment, structure is simple, detects and controls, without the need to external power source, can make an independently soft start circuit module without the need to extra CPU, not by the restriction of cpu resource, applying flexible; Without the need to relay, can not spark be produced, can use in responsive occasion such as explosion-proof grade, applied widely; Substitute the relay of prior art with thyristor, thus make that the volume of circuit is less, cost is lower, erection space can be reduced and increase economic efficiency; Thyristor, for relay, has higher life and reliability.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not the restriction to the utility model protection range; although done to explain to the utility model with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical solution of the utility model or equivalent replacement, and not depart from essence and the scope of technical solutions of the utility model.
Claims (6)
1. the DC bus soft start circuit of a uninterrupted power supply, be connected between battery module and dc-link capacitance module, battery module comprises battery, dc-link capacitance module comprises bus capacitor, it is characterized in that: comprise field effect transistor drive circuit, thyristor driving circuit and current-limiting circuit, described field effect transistor drive circuit comprises field effect transistor, described thyristor driving circuit comprises thyristor, the controlled transient switching of described field effect transistor, field effect transistor drive circuit is from battery electricity-taking, for thyristor driving circuit provides drive current, then turn on thyristors, thyristor driving circuit is from battery electricity-taking, by current-limiting circuit be bus capacitor charging.
2. the DC bus soft start circuit of a kind of uninterrupted power supply as claimed in claim 1, is characterized in that: described battery module comprises battery BAT1 and the cell switch K1 of serial connection, and described battery BAT1 comprises the positive pole BAT1+ of battery and the negative pole BAT-of battery, described dc-link capacitance module comprises DC bus anode BUS+, DC bus negative terminal BUS-and electrochemical capacitor C2, described field effect transistor is denoted as Q2, described field effect transistor drive circuit also comprises touch-switch K1, resistance R3, resistance R5, electric capacity C1, voltage stabilizing didoe D2, one end of described resistance R5 is connected with the positive pole BAT+ of described battery, the other end of described resistance R5 is connected with one end of touch-switch K1, the other end of described touch-switch K1 is connected with one end of electric capacity C1, the other end of described electric capacity C1 is connected with the anode BUS+ of DC bus, described voltage stabilizing didoe D2 is in parallel with described electric capacity C1, described resistance R3 is in parallel with described electric capacity C1,
The grid of described field effect transistor Q2 is connected with one end of described electric capacity C1, and the source electrode of described field effect transistor Q2 is connected with the other end of described electric capacity C1, and the drain electrode of described field effect transistor Q2 is connected with the positive pole BAT+ of described battery.
3. the DC bus soft start circuit of a kind of uninterrupted power supply as claimed in claim 2, is characterized in that: described current-limiting circuit comprises resistance R4, described resistance R4 is connected between the source electrode of described field effect transistor Q2 and DC bus anode BUS+.
4. the DC bus soft start circuit of a kind of uninterrupted power supply as claimed in claim 3, is characterized in that: described thyristor driving circuit is connected between the source electrode of described field effect transistor Q2 and described resistance R4;
Described thyristor is denoted as Q1, described thyristor driving circuit also comprises resistance R1, resistance R2, the anode of described thyristor Q1 is connected with the positive pole BAT+ of described battery, the negative electrode of described thyristor Q1 is connected with one end of described resistance R4, the gate pole of described thyristor Q1 is connected with the source electrode of described field effect transistor Q2, between the gate pole that described resistance R2 is connected to described thyristor Q1 and negative electrode.
5. the DC bus soft start circuit of a kind of uninterrupted power supply as claimed in claim 4, is characterized in that: described resistance R1 is connected between the positive pole BAT+ of described battery and the drain electrode of described field effect transistor Q2.
6. the DC bus soft start circuit of a kind of uninterrupted power supply as claimed in claim 2, it is characterized in that: be connected to diode D1 between the source electrode of described field effect transistor Q2 and the gate pole of described thyristor Q1, electric current during described diode D1 conducting flows to DC bus from battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420680729.3U CN204216780U (en) | 2014-11-14 | 2014-11-14 | A kind of DC bus soft start circuit of uninterrupted power supply |
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| CN201420680729.3U CN204216780U (en) | 2014-11-14 | 2014-11-14 | A kind of DC bus soft start circuit of uninterrupted power supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787700A (en) * | 2016-12-02 | 2017-05-31 | 安徽博微智能电气有限公司 | A kind of Modular UPS battery cold start-up circuit |
| CN107579555A (en) * | 2017-08-21 | 2018-01-12 | 上海空间电源研究所 | Space high tension battery Soft Starting System and its method |
| CN109075602A (en) * | 2016-09-06 | 2018-12-21 | 株式会社自动网络技术研究所 | Vehicle-mounted stand-by provision |
| CN109119974A (en) * | 2018-09-27 | 2019-01-01 | 东莞市广荣电子制品有限公司 | A kind of circuit of the static leakage current of reduction for EPS power supply |
-
2014
- 2014-11-14 CN CN201420680729.3U patent/CN204216780U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109075602A (en) * | 2016-09-06 | 2018-12-21 | 株式会社自动网络技术研究所 | Vehicle-mounted stand-by provision |
| CN106787700A (en) * | 2016-12-02 | 2017-05-31 | 安徽博微智能电气有限公司 | A kind of Modular UPS battery cold start-up circuit |
| CN107579555A (en) * | 2017-08-21 | 2018-01-12 | 上海空间电源研究所 | Space high tension battery Soft Starting System and its method |
| CN107579555B (en) * | 2017-08-21 | 2019-10-25 | 上海空间电源研究所 | Space high tension battery Soft Starting System and its method |
| CN109119974A (en) * | 2018-09-27 | 2019-01-01 | 东莞市广荣电子制品有限公司 | A kind of circuit of the static leakage current of reduction for EPS power supply |
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