CN210350817U - Shunt tripping driving circuit with multiple protection functions - Google Patents
Shunt tripping driving circuit with multiple protection functions Download PDFInfo
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- CN210350817U CN210350817U CN201920971520.5U CN201920971520U CN210350817U CN 210350817 U CN210350817 U CN 210350817U CN 201920971520 U CN201920971520 U CN 201920971520U CN 210350817 U CN210350817 U CN 210350817U
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Abstract
The utility model belongs to the technical field of the UPS power, a shunt release drive circuit from taking multiple protect function is proposed, including shunt release, shunt release includes trip coil and circuit breaker, the circuit breaker inserts in the battery return circuit, still include excitation power supply circuit, provide the power for trip coil, still include logic protection drive circuit, logic protection drive circuit is including the first sampling circuit who connects gradually, the second sampling circuit, first comparator circuit and second comparator circuit, first sampling circuit and second sampling circuit all are connected with battery voltage, and the output of second comparator circuit then is used for controlling trip coil and excitation power supply circuit's break-make, through above-mentioned technical scheme, when having solved UPS power trouble among the prior art, the problem in battery return circuit can not in time cut off.
Description
Technical Field
The utility model belongs to the technical field of the UPS power, a shunt release drive circuit from taking multiple protect function is related to.
Background
The storage battery is an important component of the UPS, most faults of the UPS are caused by the storage battery, especially electrical short circuit of the storage battery pack occurs, if a loop cannot be cut off in time, the fault is easy to spread, and fatal harm is brought to loads, other equipment in a machine room and even watchmen. In addition, in consideration of the importance and cooperativeness of the storage battery to the UPS power supply, more and more data rooms require that the storage battery pack for the UPS power supply must be provided with a circuit breaker controlled by the UPS power supply to perform cutoff protection. Because the modularized UPS supports full-module hot plug, shunt tripping circuit breakers are mostly adopted, namely tripping conditions of the circuit breakers do not depend on the detection of faults by self devices of the circuit breakers to trip, and the tripping conditions are controlled by external instructions. Therefore, the UPS can carry out timely cut-off protection on the battery according to the operating condition of the UPS and data synthesis obtained by the aid of the peripheral monitoring equipment.
When the UPS works in the storage battery mode, the voltage of the storage battery is gradually reduced along with the loss of the electric quantity of the storage battery, if the voltage of the storage battery is too low, the storage battery is still continuously discharged, and similarly, when the UPS works in the charging mode, if the charging voltage is too high, the storage battery is seriously dehydrated and scrapped. Therefore, as long as the UPS detects that the voltage of the storage battery is lower than or higher than the set safety threshold value, a tripping command is issued to execute cutoff protection. However, this critical protection function relies only on the single control of the UPS power supply and is obviously not guaranteed, and in case of an abnormal or "dropped connection" control signal from the UPS power supply side, the protection device will behave as a dummy when an undervoltage fault occurs.
SUMMERY OF THE UTILITY MODEL
The utility model provides a from shunt release drive circuit who takes multiple protect function has solved among the prior art when the UPS power breaks down, can not in time cut off the problem in battery return circuit.
The technical scheme of the utility model is realized like this: comprises that
The shunt release comprises a release coil and a circuit breaker, the circuit breaker is connected into a storage battery loop,
an excitation power supply circuit for supplying power to the trip coil,
the logic protection driving circuit comprises a first sampling circuit, a second sampling circuit, a first comparator circuit and a second comparator circuit which are sequentially connected, wherein the first sampling circuit and the second sampling circuit are both connected with the voltage of a storage battery, and the output end of the second comparator circuit is used for controlling the on-off of the tripping coil and the excitation power supply circuit.
Further, the chip models of the first comparator circuit and the second comparator circuit are both TL 431.
Further, first sampling circuit with second sampling circuit all adopts resistance bleeder circuit, resistance bleeder circuit includes the divider resistance that a plurality of is established ties, a plurality of divider resistance establishes ties with sampling resistor, the sampling resistor both ends are connected with TL 431's input.
Furthermore, two ends of the divider resistor are respectively connected in parallel with a short-circuit switch.
Further, the second comparator circuit and the trip coil are connected through a logic function circuit, the logic function circuit comprises a first switching tube circuit and a second switching tube circuit which are sequentially connected, the first switching tube circuit is connected with the second comparator circuit, and the second switching tube circuit is connected with the trip coil.
Further, still include optical coupling isolating circuit, optical coupling isolating circuit's input is used for inserting external control signal, optical coupling isolating circuit's collecting electrode output is connected with comparison circuit's input, comparison circuit's input still with first switch tube circuit's drain electrode is connected, comparison circuit's output with second switch tube circuit's grid is connected.
Furthermore, the optical coupling isolation circuits are multiple, and the collector output ends of the optical coupling isolation circuits are connected in parallel.
Further, the excitation power supply circuit adopts a single-ended flyback switching power supply circuit, the input end of the excitation power supply circuit is connected with the voltage of the storage battery, and the output end of the excitation power supply circuit is connected with two ends of the tripping coil.
Further, the single-ended flyback switching power supply circuit comprises a transformer, and the secondary side of the transformer is output by a single winding or output by two windings connected in series.
Further, an input filter capacitor is connected in parallel with an input end of the excitation power supply circuit, an output filter capacitor is connected in parallel with an output end of the excitation power supply circuit, the input filter capacitor is in the order of tens of microfarads, and the output filter capacitor is in the order of several farads.
The utility model discloses a theory of operation does:
the utility model discloses well first sampling circuit is used for sampling battery voltage to send into first comparator circuit, when battery voltage surpassed and sets for the high pressure threshold value, first comparator circuit output put low, and then second comparator output put high, and trip coil and excitation power supply circuit switch-on, trip coil got the electricity, and the circuit breaker is carried out the shunt release, cuts off battery circuit, avoids the battery to charge voltage too high for a long time and damages.
The utility model discloses well second sampling circuit is used for sampling battery voltage to send into second comparator circuit, when battery voltage is less than and sets for the low pressure threshold value, second comparator output was put high, the trip coil with excitation power supply circuit switch-on, the trip coil got electric, and the circuit breaker carries out shunt excitation dropout, cuts off battery circuit, avoids battery voltage to cross to hang down and still continues to discharge and damage.
The specific working process analysis is as follows:
as shown in fig. 2, the sampling resistor RHThe voltages at both ends are:
VRH＝VIN*RH/(RH1+RH2+...+RHn+RH)
VRHa reference voltage U fed to the first comparator circuit and internal to TL431REFBy comparison, when R isHVoltage V acrossRH>UREFI.e. by
VIN＞UREF*(RH1+RH2+...+RHn+RH)/RHWhen the circuit breaker is started, the U1 is switched on, the U2 is switched off, the Q1 is switched on, the U3 is switched off, the Q2 is switched on, the trip coil is electrified, the circuit breaker executes shunt tripping, and the storage battery loop is cut off.
In the same way, when RLVoltage across<UREFI.e. VIN＜UREF*(RL1+RL2+...+RLn+RL)/RLWhen the circuit breaker is started, the U1 is cut off, the U2 is cut off, the Q1 is conducted, the U3 is cut off, the Q2 is conducted, the trip coil is electrified, the circuit breaker executes shunt tripping, and the storage battery loop is cut off.
The utility model has the advantages that:
1. the utility model discloses well first sampling circuit is used for sampling battery voltage to send into first comparator circuit, when battery voltage surpassed and sets for the high-pressure protection threshold value, first comparator circuit output put low, and then second comparator output put high, the trip coil with excitation power supply circuit switch-on, trip coil are got electric, and the circuit breaker carries out the shunt release, cuts off battery circuit, avoids the battery to charge voltage too high and damage for a long time.
The utility model discloses well second sampling circuit is used for sampling battery voltage to send into second comparator circuit, when battery voltage is less than and sets for the low pressure protection threshold value, second comparator output is put highly, and trip coil and excitation power supply circuit switch-on, trip coil get electric, and the circuit breaker carries out shunt excitation and releases, cuts off battery circuit, avoids battery voltage to cross to hang down and still continue to discharge and damage.
The utility model discloses increased the battery from the hardware circuit and crossed undervoltage protection circuit, when the control signal of UPS power side is unusual or "lose the antithetical couplet", can carry out shunt release cut-off protection rapidly, play fine guard action to the battery and even whole UPS power.
2. The utility model discloses well power supply circuit is high-voltage circuit (voltage is greater than 200Vdc), and first comparator circuit and second comparator circuit all adopt chip TL431, and TL431 is inside from taking voltage reference UREFTherefore, no additional low-voltage power supply is needed, and the circuit structure is simplified.
3. The utility model discloses in first sampling circuit and second sampling circuit all adopt series resistance bleeder circuit, through dividing the adjustment of pressure sampling resistance, can realize the adjustment to battery voltage protection value, can confirm the protection value of battery voltage according to actual need, improved the utility model discloses a commonality; the two ends of the divider resistor are respectively connected with the short-circuit switches in parallel, and the access of each divider resistor is controlled by adjusting the on-off of each short-circuit switch, so that the resistance value of the divider resistor is adjusted, the convenient adjustment of the voltage protection value of the storage battery is realized, and the flexible adjustment of the voltage protection values of the storage batteries with different sections is conveniently realized.
4. The utility model discloses well second comparator circuit's output, the logical function circuit that constitutes through first switch tube circuit and second switch tube circuit handles the back, and control trip coil's break-make to reach the target of control circuit breaker break-make.
5. As shown in fig. 2, the driving circuit of the utility model can not only realize the self-protection of the over-voltage and under-voltage of the storage battery, but also receive the protection signal from the outside of the UPS power supply. For example, when taking place the conflagration, alarm signal only needs to issue to fire extinguishing system, and alarm signal inserts the utility model discloses among the drive circuit, send into comparison circuit's input after handling through opto-coupler isolation circuit, and then make U3 end, Q2 switches on, and trip coil is electrified, and the circuit breaker is carried out the shunt opening and is tripped. The optical coupling buffer circuit is a plurality of, and a plurality of optical coupling buffer circuit's collecting electrode output is parallelly connected, and multichannel outside protection signal can insert through multichannel optical coupling buffer circuit respectively like this the utility model discloses among the drive circuit, multichannel outside protection signal is logic or's relation with the output signal of first switch tube, does not influence each other, as long as any protection signal action all the way, and the circuit breaker can both be controlled and cut off the protection. The storage battery protection device is beneficial to realizing all-round protection of the storage battery, prolongs the cycle service life of the storage battery, and greatly reduces the probability of fire caused by the storage battery.
6. The utility model adopts single-end flyback switch power circuit, which has simple structure, small volume and low cost; the stable direct current voltage is obtained after the electricity is taken from the storage battery and single-ended flyback conversion is carried out, and the power supply is provided for the tripping coil.
The normal work of the shunt release needs a stable power supply, the current shunt release has various voltage levels, such as 12VDC, 24VDC, 110VDC, 220VDC and the like, if the shunt release with 12VDC and 24VDC is selected, the secondary side of the transformer selects a single winding, and if the shunt release with 110VDC and 220VDC is selected, the secondary side of the transformer selects two windings to be connected in series. Such design can support the shunt release of different voltage classes, has improved the utility model discloses a commonality.
7. The utility model discloses in first sampling circuit and second sampling circuit all take the value at input filter capacitor front end, input filter capacitor is tens of microfarads level, can avoid the interference of high frequency effectively, do not influence the change that detects battery voltage fast again; the energy at the moment of tripping of the shunt release is mainly taken from the energy stored in the output filter capacitor, the output filter capacitor is in F level, the voltage drop at the moment of tripping of the shunt release is ensured not to exceed the working voltage range of the tripping coil, and even if an input source is removed and even the short circuit of a storage battery is still ensured to reliably execute tripping protection.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic block diagram of a logic protection driving circuit of the present invention;
FIG. 2 is a schematic diagram of a logic protection driving circuit of the present invention;
fig. 3 is a schematic diagram of an embodiment of a medium excitation power circuit of the present invention;
FIG. 4 is a schematic diagram of a second embodiment of the excitation power circuit of the present invention;
in the figure: the circuit comprises a trip coil 1, an excitation power supply circuit 2, a transformer 21, an input filter capacitor 22, an output filter capacitor 23, a logic protection driving circuit 3, a first sampling circuit 31, a voltage dividing resistor 311, a sampling resistor 312, a short-circuit switch 313, a first comparator circuit 32, a second comparator circuit 33, a second sampling circuit 34, a logic function circuit 35, a first switching tube circuit 351, a second switching tube circuit 352, an optical coupling isolation circuit 36 and a comparison circuit 37.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-4, comprises
The shunt release comprises a release coil 1 and a circuit breaker, wherein the circuit breaker is connected into a storage battery loop,
an excitation power supply circuit 2 for supplying power to the trip coil 1,
the logic protection driving circuit 3 comprises a first sampling circuit 31, a second sampling circuit 34, a first comparator circuit 32 and a second comparator circuit 33 which are connected in sequence, wherein the first sampling circuit 31 and the second sampling circuit 34 are both connected with the voltage of a storage battery, and the output end of the second comparator circuit 33 is used for controlling the on-off of the trip coil 1 and the excitation power circuit 2.
The utility model discloses well first sampling circuit 31 is used for sampling battery voltage to send into first comparator circuit 32, when battery voltage exceeded and set for the high pressure protection threshold value, first comparator circuit 32 output put low, and then the output of second comparator put high, and trip coil 1 and excitation power supply circuit 2 switch-on, trip coil 1 got electric, and the circuit breaker carries out the shunt release, cuts off battery circuit, avoids the battery to charge for a long time voltage too high and damage.
The utility model discloses well second sampling circuit 34 is used for sampling battery voltage to send into second comparator circuit 33, when battery voltage is less than and sets for the low pressure protection threshold value, second comparator output is put highly, and trip coil 1 and excitation power supply circuit 2 switch-on, trip coil 1 get electric, and the circuit breaker carries out the shunt release, cuts off battery circuit, avoids battery voltage to hang down and still continues to discharge and damage excessively.
The utility model discloses increased the battery from the hardware circuit and crossed undervoltage protection circuit, when the control signal of UPS power side is unusual or "lose the antithetical couplet", can carry out shunt release cut-off protection rapidly, play fine guard action to the battery and even whole UPS power.
Further, the first comparator circuit 32 and the second comparator circuit 33 both have a TL431 chip.
The utility model discloses well UPS power supply circuit is for being greater than 200 Vdc's high-voltage circuit, and first comparator circuit 32 and second comparator circuit 33 all adopt chip TL431, and TL431 is inside from taking the voltage reference, consequently need not additionally to provide the low voltage power supply to be favorable to simplifying circuit structure.
Further, the first sampling circuit 31 and the second sampling circuit 34 both adopt resistance voltage dividing circuits, each resistance voltage dividing circuit includes a plurality of voltage dividing resistors 311 connected in series, the plurality of voltage dividing resistors 311 are connected in series with the sampling resistor 312, and both ends of the sampling resistor 312 are connected with the input end of the TL 431.
Further, both ends of the voltage dividing resistor 311 are connected in parallel to a short-circuit switch 313.
In the utility model, the first sampling circuit 31 and the second sampling circuit 34 both adopt a resistance voltage-dividing circuit, and the adjustment of the protection value of the storage battery voltage can be realized by adjusting the resistance value of the voltage-dividing resistor 311 and the resistance value of the sampling resistor 312, and the protection value of the UPS battery voltage can be determined according to actual needs, thereby improving the universality of the utility model; the two ends of the voltage dividing resistor 311 are respectively connected with the short-circuit switches 313 in parallel, and the access of each voltage dividing resistor 311 is controlled by adjusting the on-off of each short-circuit switch 313, so that the total resistance of the voltage dividing resistor 311 is adjusted, the voltage protection value of the storage battery is conveniently adjusted, and the voltage protection values of the storage batteries with different numbers of sections can be flexibly adjusted.
Further, the second comparator circuit 33 and the trip coil 1 are connected by the logic function circuit 35, the logic function circuit 35 includes a first switching tube circuit 351 and a second switching tube circuit 352 which are connected in sequence, the first switching tube circuit 351 is connected with the second comparator circuit 33, and the second switching tube circuit 352 is connected with the trip coil 1.
The utility model discloses well second comparator circuit 33's output, the logical function circuit 35 back of constituteing through first switch tube circuit 351 and second switch tube circuit 352, the on-off of control trip coil 1 to reach the target of control circuit breaker break-make.
Further, the circuit also comprises an optical coupling isolation circuit 36, an input end of the optical coupling isolation circuit 36 is used for accessing an external control signal, a collector output end of the optical coupling isolation circuit 36 is connected with an input end of a comparison circuit 37, an input end of the comparison circuit 37 is also connected with a drain electrode of the first switching tube circuit 351, and an output end of the comparison circuit 37 is connected with a gate electrode of the second switching tube circuit 352.
As shown in fig. 2, the driving circuit of the utility model can not only realize the self-protection of the over-voltage and under-voltage of the storage battery, but also receive the protection signal from the outside of the UPS power supply. For example, when taking place the conflagration, alarm signal only needs to issue to fire extinguishing system, and alarm signal inserts the utility model discloses among the drive circuit, send into comparison circuit 37's input after handling through opto-coupler isolation circuit 36, and then make U3 end, Q2 switches on, and trip coil gets electric, and the circuit breaker carries out the shunt opening and is tripped.
Further, optical coupling isolation circuit is a plurality of, and a plurality of optical coupling isolation circuit's collecting electrode output is parallelly connected, and multichannel outside protection signal can insert through multichannel optical coupling isolation circuit respectively like this the utility model discloses in the drive circuit, do not influence mutually, as long as any protection signal action all the way, the circuit breaker can both be controlled and cut off the protection. The storage battery protection device is beneficial to realizing all-round protection of the storage battery, prolongs the cycle service life of the storage battery, and greatly reduces the probability of fire caused by the storage battery.
Further, the excitation power supply circuit 2 adopts a single-ended flyback switching power supply circuit, the input end of the excitation power supply circuit 2 is connected with the voltage of the storage battery, and the output end of the excitation power supply circuit 2 is connected with two ends of the trip coil 1.
Further, the single-ended flyback switching power supply circuit includes a transformer 21, and the secondary side of the transformer 21 is a single-winding output or a series output of two windings.
The utility model adopts a single-end flyback switching power supply circuit as the excitation power supply circuit 2, and has simple circuit structure, small volume and low cost; the stable direct current voltage is obtained after the electricity is taken from the storage battery and the single-end flyback conversion is carried out, and the power supply is provided for the trip coil 1.
The normal work of the shunt release needs a stable power supply, the current shunt release has various voltage levels, such as 12VDC, 24VDC, 110VDC, 220VDC and the like, if the shunt release with 12VDC and 24VDC is selected, the secondary side of the transformer 21 selects a single winding, and if the shunt release with 110VDC and 220VDC is selected, the secondary side of the transformer 21 selects two windings to be connected in series. The shunt release that can support different voltage classes of design like this has improved the utility model discloses a commonality.
Further, an input filter capacitor 22 is connected in parallel to an input end of the excitation power supply circuit 2, an output filter capacitor 23 is connected in parallel to an output end of the excitation power supply circuit 2, the input filter capacitor 22 is in the order of tens of microfarads, and the output filter capacitor 23 is in the order of several farads.
The utility model discloses in first sampling circuit 31 and second sampling circuit 34 all take the value at input filter capacitor 22 front end, input filter capacitor 22 is tens of microfarads level, can avoid the interference of high frequency effectively, do not influence the change that detects battery voltage fast again; the energy at the moment of tripping of the shunt release is mainly taken from the energy stored in the output filter capacitor 23, the output filter capacitor 23 is in F level, the voltage drop at the moment of tripping of the shunt release is ensured not to exceed the working voltage range of the trip coil 1, and even if an input source or even a short circuit of a storage battery is removed, the tripping protection can still be reliably executed.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a shunt release drive circuit from taking multiple protect function for protect the battery, its characterized in that: comprises that
The shunt release comprises a trip coil (1) and a circuit breaker, wherein the circuit breaker is connected into a storage battery loop,
an excitation power supply circuit (2) for providing power supply for the trip coil (1),
logic protection drive circuit (3), including first sampling circuit (31), first comparator circuit (32), second sampling circuit (34) and second comparator circuit (33) that connect gradually, first sampling circuit (31) and second sampling circuit (34) all are connected with battery voltage, the output of second comparator circuit (33) is used for control trip coil (1) with the break-make of excitation power supply circuit (2).
2. The shunt trip driving circuit with multiple protection functions of claim 1, wherein: the first comparator circuit (32) and the second comparator circuit (33) are both TL431 in chip type.
3. The shunt trip driving circuit with multiple protection functions of claim 2, wherein: first sampling circuit (31) with resistance bleeder circuit is all adopted in second sampling circuit (34), resistance bleeder circuit includes divider resistance (311) that a plurality of is established ties, a plurality of divider resistance (311) are established ties with sampling resistance (312), sampling resistance (312) both ends are connected with TL 431's input.
4. The shunt trip driving circuit with multiple protection functions of claim 3, wherein: two ends of the voltage dividing resistor (311) are respectively connected with a short-circuit switch (313) in parallel.
5. The shunt trip driving circuit with multiple protection functions of claim 1, wherein: the second comparator circuit (33) and the trip coil (1) are connected through a logic function circuit (35), the logic function circuit (35) comprises a first switching tube circuit (351) and a second switching tube circuit (352) which are sequentially connected, the first switching tube circuit (351) is connected with the second comparator circuit (33), and the second switching tube circuit (352) is connected with the trip coil (1).
6. The shunt trip driving circuit with multiple protection functions according to claim 5, wherein: the circuit further comprises an optical coupling isolation circuit (36), the input end of the optical coupling isolation circuit (36) is used for being connected with an external control signal, the collector output end of the optical coupling isolation circuit (36) is connected with the input end of a comparison circuit (37), the input end of the comparison circuit (37) is also connected with the drain electrode of the first switching tube circuit (351), and the output end of the comparison circuit (37) is connected with the grid electrode of the second switching tube circuit (352).
7. The shunt trip driving circuit with multiple protection functions of claim 6, wherein: the optical coupling isolation circuits (36) are a plurality of, and the collector output ends of the optical coupling isolation circuits (36) are connected in parallel.
8. The shunt trip driving circuit with multiple protection functions of claim 1, wherein: the excitation power supply circuit (2) adopts a single-ended flyback switching power supply circuit, the input end of the excitation power supply circuit (2) is connected with the voltage of the storage battery, and the output end of the excitation power supply circuit (2) is connected with the two ends of the tripping coil (1).
9. The shunt trip driving circuit with multiple protection functions according to claim 8, wherein: the single-ended flyback switching power supply circuit comprises a transformer (21), wherein the secondary side of the transformer (21) is output by a single winding or output by two windings in series.
10. The shunt trip driving circuit with multiple protection functions of claim 1, wherein: the input end of the excitation power supply circuit (2) is connected with an input filter capacitor (22) in parallel, the output end of the excitation power supply circuit (2) is connected with an output filter capacitor (23) in parallel, the input filter capacitor (22) is in the order of tens of microfarads, and the output filter capacitor (23) is in the order of several farads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920971520.5U CN210350817U (en) | 2019-06-26 | 2019-06-26 | Shunt tripping driving circuit with multiple protection functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920971520.5U CN210350817U (en) | 2019-06-26 | 2019-06-26 | Shunt tripping driving circuit with multiple protection functions |
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| CN210350817U true CN210350817U (en) | 2020-04-17 |
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| CN201920971520.5U Active CN210350817U (en) | 2019-06-26 | 2019-06-26 | Shunt tripping driving circuit with multiple protection functions |
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- 2019-06-26 CN CN201920971520.5U patent/CN210350817U/en active Active
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