CN1159824C - Power supply module for communication - Google Patents
Power supply module for communication Download PDFInfo
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- CN1159824C CN1159824C CNB021151687A CN02115168A CN1159824C CN 1159824 C CN1159824 C CN 1159824C CN B021151687 A CNB021151687 A CN B021151687A CN 02115168 A CN02115168 A CN 02115168A CN 1159824 C CN1159824 C CN 1159824C
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Abstract
The present invention relates to a communication power module. A contact switch of an over/under-voltage breakaway relay and a contact switch of a soft start-up relay are connected in series between the voltage of a power network and an input electrolytic capacitor. A soft start-up resistor is connected in parallel between both ends of the contact switch of the soft start-up relay. A coil of the over/under-voltage breakaway relay is controlled by an over/under-voltage breakaway circuit which can make the contact switch of the breakaway relay switched off when the voltage of the power network exceeds a normal range, and the coil of the soft start-up relay is controlled by a soft start-up control circuit which makes the coil of the soft start-up relay switched on for the convenience of short-circuiting the soft start-up resistor after the voltage of the power network is connected in for certain delaying. The present invention provides a communication power module which can effectively avoid over-current impact on the input electrolytic capacitor when the power network is connected in and can be isolated from the power network in time when the voltage of the power network is too high or too low for protecting the input electrolytic capacitor.
Description
Technical field
The present invention relates to communication power supply, specifically a kind of in order to protect the input electrochemical capacitor in the power supply module for communication can not damage the new design of carrying out because of too high voltages, over-current shock.
Background technology
At present, the power supply module for communication on the market, the pattern that its input overvoltage protection is done usually is to turn-off the driving pulse of PFC control chip and DC/DC circuit control chip, thereby has protected the circuit of back.But, structurally, the shortcoming that this way exists the input electrochemical capacitor to be easy to damage inevitably.Its reason has three: 1, because the electrochemical capacitor of power rectifier part does not break away from electrical network all the time, when line voltage is higher than the withstand voltage of electric capacity, then import electrochemical capacitor and must damage.2, because the running environment of base station communication power supply is more abominable, and voltage ripple of power network is very big, the possibility that the input electrochemical capacitor damages is bigger.3, owing to the superpotential reason of certain operations, the impact that can produce the moment overcurrent, fragile input electrochemical capacitor.In addition under situations such as beginning because of operate miss, when the phase voltage misconnection is become line voltage, the input electrochemical capacitor must damage.
In fact, the damage of input electrochemical capacitor is one of major failure of power module.
Summary of the invention
Purpose of the present invention is intended to overcome above-mentioned the deficiencies in the prior art, proposes a kind of electrochemical capacitor of importing and can effectively avoid over-current shock, can in time isolate the power module of importing electrochemical capacitor when line voltage exceeds normal range (NR) when connecting electrical network.
Realize the technical scheme of above-mentioned purpose: a kind of power supply module for communication, comprise and break away from relay (RLY1), soft start relay (RLY2), soft start resistance, pfc circuit and DC/DC translation circuit, break away from relay (RLY1) and when line voltage is higher than set point, can make the breaking circuit control that breaks away from the relay contact switch disconnection by one, line voltage is through the contact switch (RLY1a) of the disengaging relay (RLY1) of series connection, the contact switch (RLY2a) of soft start relay (RLY2) connects pfc circuit, the output of pfc circuit connects the DC/DC translation circuit, contact switch (RLY2a) two ends of described soft start relay (RLY2) soft start resistance in parallel, soft start relay (RLY2) by one when line voltage inserts in normal range (NR), after certain time-delay, can make the SS (soft start) control circuit control of soft start resistive short.
Described disengaging relay (RLY1) breaks away from the overvoltage/undervoltage breaking circuit control that relay contact switch disconnects by one when line voltage can make when exceeding normal range (NR).
Described overvoltage/undervoltage breaking circuit is by the network voltage detection circuit, the under-voltage locking comparator, the voltage peak holding circuit, overvoltage comparator and triode switch are formed, the detection signal of network voltage detection circuit connect the in-phase input end of under-voltage locking comparator and under-voltage locking comparator inverting input under-voltage reference voltage relatively, the output of under-voltage locking comparator connects the negative electrode of diode, the anode of diode connects the base stage of triode switch (Q1), another voltage division signal of network voltage detection circuit connects the voltage peak holding circuit, the output of voltage peak holding circuit connect the inverting input of overvoltage comparator and overvoltage comparator in-phase input end the overvoltage reference voltage relatively, the output signal of overvoltage comparator connects the base stage of triode switch (Q1) through driving resistor, and the output control overvoltage/undervoltage of triode switch (Q1) breaks away from relay.
Described SS (soft start) control circuit is by AC detection circuit, accessory power supply, delay circuit, comparator and transistor switching circuit are formed, the input of the AC detection circuit voltage that gets access to grid, the control signal output of AC detection circuit connects the comparator inverting input, the input of accessory power supply also connects the two ends of importing electrochemical capacitor in the pfc circuit, the output of accessory power supply connects the comparator in-phase input end behind electric resistance partial pressure, the output of accessory power supply connects the comparator inverting input through delay circuit, the output signal of comparator connects the base stage of triode switch (Q2) through driving resistor, the output control soft start relay of transistor switching circuit (Q2).
Described delay circuit is made up of R14, C5, and the output of accessory power supply connects the comparator inverting input through resistance R 14, and inverting input is through C5 ground connection.
Described SS (soft start) control circuit comprises delay circuit and transistor switching circuit, the output signal of overvoltage comparator connects the delay circuit input in the overvoltage/undervoltage buffer circuit, delay circuit output connects transistor switching circuit, the output control soft start relay of transistor switching circuit.
Between delay circuit and transistor switching circuit, comparator is set, delay circuit output through comparator and time-delay reference voltage relatively back output connect transistor switching circuit, the soft start relay is controlled in the output of transistor switching circuit.
Adopt technique scheme, the technological progress that the present invention gives prominence to is: 1, the SS (soft start) control circuit of soft start resistance and relay control is set, charges to input capacitance by soft start resistance, finish soft start function.Effectively avoided the impact of overvoltage and overcurrent to the input electrochemical capacitor.Circuit structure is simple, ingenious, reliability is high.2, by the overvoltage/undervoltage breaking circuit of relay control is set, no matter overvoltage still is under-voltage, can module be broken away from from electrical network, thereby protected the input electrochemical capacitor in time with the power supply circuits cut-out of power module.The control of employing relay, circuit is simple, reliable, and cost is low.Even 3 power modules are the wrong AC line under very high line voltage or accidentally, therefore power module also can not damage.In sum, the present invention is owing to be provided with the overvoltage/undervoltage breaking circuit and the SS (soft start) control circuit that soft start resistance is set and is controlled by relay of relay control, can bear heavy current impact, big antisurge and thunderbolt ability are improved the overall work reliability of power module.Reduce the fault that power module causes because of the input overvoltage greatly.4, adopt relay control, control circuit is simple in structure, and the reliability height is with low cost, more is applicable to single-phase input power module.
Below in conjunction with accompanying drawing, the present invention is further detailed explanation by embodiment:
Description of drawings
Fig. 1 realizes a kind of structured flowchart of the present invention.
Fig. 2 is the circuit diagram of Fig. 1.
Fig. 3 realizes another kind of structured flowchart of the present invention.
Fig. 4 is the circuit diagram of Fig. 3.
Embodiment
Embodiment one: in conjunction with Fig. 1 and Fig. 2, a kind of power supply module for communication, break away from relay by overvoltage/undervoltage, the overvoltage/undervoltage breaking circuit, the soft start relay, soft start resistance R 1, SS (soft start) control circuit, pfc circuit and DC/DC translation circuit are formed, at line voltage (ACL, ACN) with pfc circuit between the overvoltage/undervoltage of connecting break away from relay contact switch RLY1a, meet rectifier bridge B1 behind the soft start relay contact switch RLY2a, the soft start resistance R 1 in parallel at soft start relay contact switch RLY2a two ends, overvoltage/undervoltage breaks away from relay R LY1 can make overvoltage/undervoltage disengaging relay R LY1 get electric so that disconnect the breaking circuit control that overvoltage/undervoltage breaks away from relay contact switch when line voltage is higher than set point or be lower than another set point (under voltage) by one, soft start relay R LY2 by one when line voltage inserts in normal range (NR), after certain time-delay, can make the SS (soft start) control circuit control of soft start resistive short, rectifier bridge B1 output connects pfc circuit, and PFC output inserts the DC/DC circuit behind electrochemical capacitor C1 filtering voltage regulation.
The overvoltage/undervoltage breaking circuit is by R2～4 voltage dividers, under-voltage locking comparator comp0, voltage peak holding circuit F, overvoltage comparator comp1 and triode switch Q1 form, whether detect is that the signal of low voltage signal (lowdetc) is through R6, C3 filtering connect the in-phase input end of under-voltage locking comparator comp0 and under-voltage locking comparator inverting input under-voltage reference voltage relatively, under-voltage reference voltage is provided by accessory power supply 1, accessory power supply 1 voltage that gets access to grid, the output of under-voltage locking comparator comp0 connects the negative electrode of diode D9, the anode of diode D9 connects the base stage of triode switch Q1, if electrical network is under-voltage with the Q1 drive signal draws and be electronegative potential, guarantee that coil RLY1 can not get.Detect whether to be the signal of overvoltage signal (overdetc) meet voltage peak holding circuit F, the output of voltage peak holding circuit F connect the inverting input of overvoltage comparator comp1 and overvoltage comparator in-phase input end the overvoltage reference voltage relatively, the output signal of overvoltage comparator comp1 connects the base stage of triode switch Q1 through driving resistor R12, and the output control overvoltage/undervoltage of triode switch Q1 breaks away from relay R LY1.
SS (soft start) control circuit is made up of AC detection circuit A, accessory power supply 2, delay circuit, comparator comp2 and triode switch Q2 circuit, when detecting line voltage in normal range (NR) the time, soft starting circuit is decontroled work.The charging voltage at input electrochemical capacitor C1 two ends is the input voltage of accessory power supply 2, the output of accessory power supply 2 connects comparator comp2 in-phase input end after resistance R 17, R18 dividing potential drop, simultaneously, the output of accessory power supply 2 connects comparator comp2 inverting input through delay circuit R14, C5, the output of accessory power supply 2 connects the comparator inverting input through resistance R 14, inverting input is through C5 ground connection, the output signal of comparator comp2 connects the base stage of triode switch Q2 through driving resistor R12, the output control soft start relay R LY2 of triode switch Q2.
If line voltage is in normal range (NR), it is electric that the overvoltage/undervoltage breaking circuit gets relay R LY1, its contact R of adhesive LY1a.Line voltage is after certain time-delay, and SS (soft start) control circuit makes soft start relay R LY2 get electrical short soft start resistance.
The concrete course of work: power module powers on, over-voltage breaking circuit detects input voltage: when input voltage does not reach under-voltage relieving set point, under-voltage locking comparator comp0 is output as low level, the base stage of triode Q1 drawn be low level, triode Q1 is cut off, and relay R LY1 coil must not be electric, breaks away from electrical network, make the abundant energy storage of accessory power supply 1 part simultaneously, guarantee reliable attracting electric relay contact R LY1a when set point.When input voltage had been higher than the low voltage set value and be lower than in the normal range of operation between the overvoltage set point, on the one hand, comparator comp0 was output as high level, and undervoltage lockout circuit is decontroled.On the other hand, because the detected electrical network voltage division signal of comparator comp1 inverting input voltage peak holding circuit F is lower than the overvoltage comparative voltage of comparator comp1 in-phase input end, comparator comp1 exports high level, triode Q1 conducting, make reliable the getting of coil RLY1 of relay 1, adhesive contact R LY1a, power module gets electric, operate as normal.When input voltage is higher than the overvoltage set point; because the detected electrical network voltage division signal of comparator comp1 inverting input voltage peak holding circuit F is higher than the overvoltage comparative voltage of comparator comp1 in-phase input end; comparator comp1 state changes; output low level,, triode Q1 is cut off; relay R LY1 coil must not; break contact RLY1a, power module breaks away from from electrical network, has protected that the input electrochemical capacitor is unlikely to be damaged by overvoltage.
Normal when detecting electrical network at AC detection circuit A, soft starting circuit work, alternating current is given input electrochemical capacitor C1 charging by resistance R 1 earlier during startup, guarantees not have big input impulse current, behind the time delays by R14, C5 setting, comparator comp2 state variation, output low level, triode switch Q2 conducting, relay R LY2 coil is got, adhesive contact R LY2a, short circuit soft start resistance R 1, modular power source is worked under full input voltage.
In the present embodiment, over-voltage breaking and module soft start are separate work.In addition, by the signal of control relay RLY1 adhesive being done the time-delay control relay RLY2 adhesive of setting, can realize soft start control equally.
Embodiment two: another kind of power supply module for communication, as shown in Figure 3 and Figure 4, in the present embodiment, SS (soft start) control circuit is by delay circuit, comparator comp2 and triode switch Q5 circuit are formed, delay circuit is by R14, C5 constitutes, the output signal of the overvoltage comparator comp1 of triode switch Q1 base terminal connects the resistance R 14 of delay circuit through driving resistor R12, through R14, connect the in-phase input end of comparator comp2 after the C5 time-delay, with comparator comp2 inverting input through R15, relatively back output of the time-delay reference voltage that provides after the R16 dividing potential drop, by the base stage of driving resistor R17 to triode switch Q5, the output of transistor switching circuit Q5 control soft start relay R LY2.Other circuit structure with
Embodiment one identical (being omitted).
After power module powers on, when breaking circuit detection input voltage is within working range, the high-level control signal ctrl of triode switch Q1 base terminal drives triode Q1 conducting, relay R LY1 coil is got, adhesive contact R LY1a, module gets, civil power is given input electrochemical capacitor C1 charging by soft start resistance R 1, as the high-level control signal ctrl of triode switch Q1 base terminal process R14, after the time-delay that C5 sets, comparator comp2 action, drive triode Q5 conducting, it is electric that relay R LY2 coil is got, and adhesive contact R LY2a is with 1 short circuit of soft start resistance R, soft start-up process is finished, and module is worked under full input voltage.When input voltage surpasses input overvoltage set point, comparator comp1 state changes, output low level, the low level control signal ctrl of triode switch Q1 base terminal is cut off triode Q1, relay R LY1 coil blackout, break contact RLY1a, the base charge by diode D11 back suction triode Q5 simultaneously cuts off the power supply relay R LY2 very soon.
Adopt said structure, the present invention can design the operating voltage range of broad as required, and by rational design, the overvoltage/undervoltage breaking circuit can exchange long-term work under the 500V, and device all satisfies derate.Can bear heavy current impact, big antisurge and thunderbolt ability are improved the overall work reliability of power module.
Claims (7)
1, a kind of power supply module for communication, comprise and break away from relay (RLY1), pfc circuit and DC/DC translation circuit, break away from relay (RLY1) and when line voltage is higher than set point, can make the breaking circuit control that breaks away from the relay contact switch disconnection by one, the contact switch (RLY1a) of line voltage through breaking away from relay (RLY1) connects pfc circuit, the output of pfc circuit connects the DC/DC translation circuit, it is characterized in that:
A, also comprise a soft start relay (RLY2) and a soft start resistance;
The contact switch (RLY2a) of b, the described soft start relay (RLY2) of between the contact switch (RLY1a) of described disengaging relay (RLY1) and pfc circuit, connecting again;
C, at contact switch (RLY2a) two ends of described soft start relay (RLY2) soft start resistance in parallel;
D, described soft start relay (RLY2) by one when line voltage inserts in normal range (NR), after certain time-delay, can make the SS (soft start) control circuit control of soft start resistive short.
2, according to the described a kind of power supply module for communication of claim 1, it is characterized in that: break away from relay (RLY1) and when line voltage exceeds normal range (NR), can make the overvoltage/undervoltage breaking circuit control that breaks away from the relay contact switch disconnection by one.
3, according to the described a kind of power supply module for communication of claim 2, it is characterized in that: the overvoltage/undervoltage breaking circuit is by the network voltage detection circuit, the under-voltage locking comparator, the voltage peak holding circuit, overvoltage comparator and triode switch are formed, the detection signal of network voltage detection circuit connect the in-phase input end of under-voltage locking comparator and under-voltage locking comparator inverting input under-voltage reference voltage relatively, the output of under-voltage locking comparator connects the negative electrode of diode, the anode of diode connects the base stage of triode switch (Q1), another voltage division signal of network voltage detection circuit connects the voltage peak holding circuit, the output of voltage peak holding circuit connect the inverting input of overvoltage comparator and overvoltage comparator in-phase input end the overvoltage reference voltage relatively, the output signal of overvoltage comparator connects the base stage of triode switch (Q1) through driving resistor, and the output control overvoltage/undervoltage of triode switch (Q1) breaks away from relay.
4, according to the described a kind of power supply module for communication of claim 3, it is characterized in that: SS (soft start) control circuit is by AC detection circuit, accessory power supply, delay circuit, comparator and transistor switching circuit are formed, the input of the AC detection circuit voltage that gets access to grid, the control signal output of AC detection circuit connects the comparator inverting input, the input of accessory power supply also connects the two ends of importing electrochemical capacitor in the pfc circuit, the output of accessory power supply connects the comparator in-phase input end behind electric resistance partial pressure, the output of accessory power supply connects the comparator inverting input through delay circuit, the output signal of comparator connects the base stage of triode switch (Q2) through driving resistor, the output control soft start relay of transistor switching circuit (Q2).
5, according to the described a kind of power supply module for communication of claim 4, it is characterized in that: delay circuit is made up of R14, C5, and the output of accessory power supply connects the comparator inverting input through resistance R 14, and inverting input is through C5 ground connection.
6, according to the described a kind of power supply module for communication of claim 3, it is characterized in that: SS (soft start) control circuit comprises delay circuit and transistor switching circuit, the output signal of overvoltage comparator connects the delay circuit input in the overvoltage/undervoltage buffer circuit, delay circuit output connects transistor switching circuit, the output control soft start relay of transistor switching circuit.
7, according to the described a kind of power supply module for communication of claim 6, it is characterized in that: between delay circuit and transistor switching circuit, comparator is set, delay circuit output through comparator and time-delay reference voltage relatively back output connect transistor switching circuit, the soft start relay is controlled in the output of transistor switching circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021151687A CN1159824C (en) | 2002-04-26 | 2002-04-26 | Power supply module for communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021151687A CN1159824C (en) | 2002-04-26 | 2002-04-26 | Power supply module for communication |
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| CN1377112A CN1377112A (en) | 2002-10-30 |
| CN1159824C true CN1159824C (en) | 2004-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021151687A Expired - Lifetime CN1159824C (en) | 2002-04-26 | 2002-04-26 | Power supply module for communication |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007118400A1 (en) * | 2006-04-13 | 2007-10-25 | Emerson Network Power Energy Systems Ab | A hardware overvoltage breakaway circuit |
| CN100477439C (en) * | 2005-01-08 | 2009-04-08 | 艾默生网络能源系统有限公司 | Switching power supply with overvoltage protection and overvoltage protection method thereof |
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| CN101685975B (en) * | 2008-09-27 | 2013-02-27 | 力博特公司 | Method and device of soft start of bus voltage in uninterruptible power supply |
| CN101447738B (en) * | 2008-12-29 | 2012-05-02 | 重庆航天工业公司 | Flameproof intrinsically safe power supply device |
| CN101640412B (en) * | 2009-09-02 | 2012-07-18 | 中兴通讯股份有限公司 | Soft-starting circuit of power supply |
| FR2992485B1 (en) * | 2012-06-21 | 2014-09-12 | Sagem Defense Securite | ELECTRICAL CUTTING CIRCUIT OF AN ELECTRIC POWER SUPPLY WITH RELAYS AND FUSES |
| CN106429756A (en) * | 2016-10-14 | 2017-02-22 | 成都绿迪科技有限公司 | Drive circuit structure used for freight elevator |
| CN108832590B (en) * | 2018-07-13 | 2023-09-29 | 浙江英洛华新能源科技有限公司 | Overcurrent protection relay |
| CN112956098B (en) * | 2020-07-15 | 2023-05-02 | 深圳欣锐科技股份有限公司 | Isolation circuit and isolation method |
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2002
- 2002-04-26 CN CNB021151687A patent/CN1159824C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100477439C (en) * | 2005-01-08 | 2009-04-08 | 艾默生网络能源系统有限公司 | Switching power supply with overvoltage protection and overvoltage protection method thereof |
| WO2007118400A1 (en) * | 2006-04-13 | 2007-10-25 | Emerson Network Power Energy Systems Ab | A hardware overvoltage breakaway circuit |
| CN100566068C (en) * | 2006-04-13 | 2009-12-02 | 艾默生网络能源系统有限公司 | Hardware overvoltage breaking-off circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1377112A (en) | 2002-10-30 |
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Address after: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee after: Vitamin Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |
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Granted publication date: 20040728 |
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