CN212063614U - UPS power supply - Google Patents
UPS power supply Download PDFInfo
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- CN212063614U CN212063614U CN202020513218.8U CN202020513218U CN212063614U CN 212063614 U CN212063614 U CN 212063614U CN 202020513218 U CN202020513218 U CN 202020513218U CN 212063614 U CN212063614 U CN 212063614U
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Abstract
The utility model relates to a power technical field provides a UPS power, include: the main circuit, the bypass switch, the main control module and the forced bypass module. The input end of the forced bypass module is connected with the main control module, and the output end of the forced bypass module is connected with the bypass switch; the forced bypass module is used for receiving a fault signal of the main control module and sending a forced switching instruction to the bypass switch according to the fault signal; the forced switching instruction is used for indicating the action of the bypass switch. According to the UPS power supply output switching method and device, when the main control module cannot control the bypass switch to be normally switched, the bypass switch is driven to act by forcing the bypass module to output the forced switching instruction, the UPS power supply output is ensured not to be powered off, and the normal operation of the load is ensured.
Description
Technical Field
The utility model belongs to the technical field of the power, especially, relate to a UPS power.
Background
An Uninterruptible Power Supply (UPS) is a device that can continue to supply Power to a load when an ac input Power supply is abnormal or is powered off, thereby ensuring that the load supplies Power normally. The cable has excellent performance and convenient maintenance function, and is widely applied to various fields. In order to ensure the reliability of the UPS, referring to fig. 1, the UPS is generally provided with a main circuit 10 and a bypass 20, and when the main circuit 10 of the UPS fails, the main circuit is switched to the bypass 20 to supply power, so as to prevent the power supply from being interrupted. The switching of the UPS between the bypass mode and the inverter mode is realized by switches including a bypass switch 21 for switching to the bypass mode and an inverter switch 11 for switching to the inverter mode.
In the using process, due to maintenance, overload and the like, the main control module 30 of the UPS sends a control instruction to the inverter switch 11 and/or the bypass switch 21 to switch the UPS to the bypass mode, so that the main circuit 10 of the UPS is powered off. If the power supply of the main control module 30 fails, the main control module 30 cannot drive the bypass switch 21 to be normally turned on, so that the output of the UPS is powered off, and the performance of the UPS is seriously affected.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a UPS power supply to solve the problem that the bypass cannot be driven to open when the power supply of the main control module or the power supply fails in the prior art, resulting in power failure.
The embodiment of the utility model provides a first aspect provides a UPS power, include: the main circuit, the bypass switch, the main control module and the forced bypass module;
the main circuit and the bypass are respectively connected in series between the commercial power input and the load, and the bypass switch is connected in series in the bypass; the bypass driving output end of the main control module is connected with the bypass switch, and the power supply end of the main control module is connected with the first power supply end;
the input end of the forced bypass module is connected with the main control module, and the output end of the forced bypass module is connected with the bypass switch; the forced bypass module is used for receiving a fault signal of the main control module and sending a forced switching instruction to the bypass switch according to the fault signal; the forced switching instruction is used for indicating the action of the bypass switch;
the forced bypass module includes: the circuit comprises a switching tube, a first resistor, a second resistor, a third resistor and a first capacitor;
a first end of the switch tube is respectively connected with a second power supply end and a first end of the first resistor, a second end of the switch tube is respectively connected with a second end of the first resistor and a first end of the second resistor, and a third end of the switch tube is connected with an output end of the forced bypass module;
the second end of the second resistor is respectively connected with the first end of the third resistor, the first end of the first capacitor and the input end of the forced bypass module;
the second end of the third resistor is connected with the second power supply end; the second end of the first capacitor is grounded.
An embodiment of the utility model provides a UPS power, include: and the forced bypass module receives the fault signal of the main control module and sends a forced switching instruction to the bypass switch according to the fault signal, and the bypass switch acts. The embodiment of the utility model provides a UPS power when the main control module can't control bypass switch and normally switch, forces the switching instruction through forcing bypass module output to drive the bypass switch action, ensures UPS power output not outage, has guaranteed the normal operating of load. And simultaneously, the embodiment of the utility model provides a force bypass module circuit simple structure, easily realize, the fault rate is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
FIG. 1 is a schematic diagram of a prior art UPS power supply;
fig. 2 is a schematic structural diagram of a UPS power supply according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a portion of a UPS power supply according to an embodiment of the present invention 1;
fig. 4 is a schematic diagram of a partial circuit of a UPS power supply according to an embodiment of the present invention 2.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Referring to fig. 2 and 3, an embodiment of the present invention provides a UPS power supply, including: the main circuit 10, the bypass 20, the bypass switch 21, the main control module 30 and the forced bypass module 40.
The main circuit 10 and the bypass 20 are respectively connected in series between the commercial power input and the load, and the bypass switch 21 is connected in series in the bypass 20; the main control module 30, the bypass driving output end is connected with the bypass switch 21, and the power supply end is connected with a first power supply end VCC 1;
the input end of the forced bypass module 40 is connected with the main control module 30, and the output end of the forced bypass module is connected with the bypass switch 21; the forced bypass module 40 is configured to receive a fault signal of the main control module 30, and send a forced switching instruction to the bypass switch 21 according to the fault signal; the forced switching instruction is used for indicating the switching action of the bypass 20;
the forced bypass module 40 includes: the circuit comprises a switching tube Q1, a first resistor R5, a second resistor R8, a third resistor R6 and a first capacitor C8.
A switch Q1, a first end of which is connected to the second power source terminal VCC2 and the first end of the first resistor R5, a second end of which is connected to the second end of the first resistor R5 and the first end of the second resistor R8, and a third end of which is connected to the output terminal of the forced bypass module 40;
a second end of the second resistor R8 is connected to a first end of the third resistor R6, a first end of the first capacitor C8, and an input end of the force-bypass module 40, respectively;
a second terminal of the third resistor R6 is connected to a second power supply terminal VCC 2; the second terminal of the first capacitor C8 is connected to ground.
When the main control module 30 works normally, the bypass driving output end of the main control module 30 is connected with the bypass switch 21, and the main control module 30 sends a bypass driving signal to the bypass switch 21 to control the action of the bypass switch 21; the switching of the UPS power supply between the bypass mode and the inversion mode is realized. When the power supply of the main control module 30 is abnormal, the main control module 30 cannot normally drive the bypass switch 21 to operate, and the bypass module 40 is forced to detect the abnormal condition of the main control module 30 and drive the bypass switch 21 to operate according to the fault signal. For example, when the UPS power needs to be switched to the bypass state, the main control module 30 loses power, the forced bypass module 40 controls the bypass switch 21 to close after detecting the abnormal condition, and the UPS power is switched to the bypass mode. Simultaneously the embodiment of the utility model provides a force bypass module 40 circuit simple structure, easily realize. When the main control module 40 is normal, the fault signal is at a high level; when the main control module 40 is abnormal, the fault signal is low level, the switching tube Q1 is turned on, and the bypass module 40 is forced to output high level to drive the bypass switch 21 to be closed, so that the power failure of the UPS power supply is avoided, and the normal operation of the load is ensured.
In some embodiments, the forced bypass module 40 may further include: an eighth resistor R7.
The fault signal output terminal of the main control module 30 is connected to the first terminal of the third resistor R6 through the eighth resistor R7.
In some embodiments, the switching transistor Q1 may be a triode.
And the emitter of the triode is connected with the first end of the first resistor R5, the base of the triode is connected with the second end of the first resistor R5, and the collector of the triode is connected with the output end of the forced bypass module 40.
In some embodiments, the UPS power supply may further include: transformer T1, auxiliary power supply module 41, and main power supply module 31.
A transformer T1, the primary side of which is connected to the mains supply, the first secondary side of which is connected to the input terminal of the main power module 31, and the second secondary side of which is connected to the input terminal of the auxiliary power module 41;
the output terminal of the main power module 31 is connected to the first power terminal VCC1, and the output terminal of the auxiliary power module 41 is connected to the second power terminal VCC 2.
The auxiliary power module 41 and the main power module 31 share one transformer T1, and the auxiliary power module 41 and the main power module 31 are independent from each other and do not interfere with each other.
In some embodiments, referring to fig. 4, the auxiliary power supply module 41 may include: a first unidirectional conducting device D5, a rectifier bridge BG1 and a voltage regulator IC 1.
The input end of the rectifier bridge BG1 is connected with the input end of the auxiliary power supply module 41, and the output end of the rectifier bridge BG1 is connected with the input end of the voltage stabilizer IC 1;
the positive electrode of the first unidirectional conducting element D5 is connected to the output terminal of the voltage regulator IC1, and the negative electrode thereof is connected to the output terminal of the auxiliary power supply module 41.
The rectifier bridge BG1 converts the ac power into dc power and transmits the dc power to the voltage regulator IC1, and the voltage regulator IC1 outputs the stable dc power after passing through the first unidirectional conductive element D5.
In some embodiments, regulator IC1 may be of type 7812 with an output voltage of + 12V.
In some embodiments, referring to fig. 4, the UPS power supply may further include: a second unidirectional conductive element D6 and a second capacitor C6.
A second unidirectional conducting element D6 having a positive terminal connected to the first power supply terminal VCC1 and a first terminal of the second capacitor C6, respectively, and a negative terminal connected to the second power supply terminal VCC 2; the negative terminal of the second capacitor C6 is connected to ground.
The first power terminal VCC1 is connected to the second power terminal VCC2 through the second unidirectional conducting device D6, when the first power terminal VCC1 is powered off, the auxiliary power module 41 supplies power to the forced bypass module 40, and the second unidirectional conducting device D6 is turned off in the opposite direction. When the first power terminal VCC1 is powered normally, the first power terminal VCC1 supplies power to the forced bypass module 40 through D6. Since the voltage of the first power terminal VCC1 is slightly higher than the output voltage of the auxiliary power module 41, the first one-way conduction element D5 is turned off in the opposite direction, and the auxiliary power module 41 stops working, thereby reducing power consumption and saving resources.
In some embodiments, the auxiliary power module 41 may further include: a seventh resistor R1 and a light emitting diode LED 1.
The anode of the light emitting diode LED1 is connected to the second power supply terminal VCC2 through the seventh resistor R1, and the cathode is grounded.
When the voltage of the second power terminal VCC2 is normal, the light emitting diode LED1 lights up, indicating that the power supply is normal.
In some embodiments, the first unidirectional conducting element D5 and the second unidirectional conducting element D6 may be diodes.
In some embodiments, the auxiliary power module 41 further includes an auxiliary resistor and a capacitor, which are not described herein, and refer to fig. 4 specifically.
In some embodiments, referring to fig. 3, the UPS power supply may further include: a first and gate IC4 and a pulse unit IC 6.
And a first and gate IC4, a first input terminal of which is connected to the output terminal of the forced bypass module 40, a second input terminal of which is connected to the pulse unit IC6, and an output terminal of which is connected to the bypass switch 21.
In the application, the pulse signal generated by the pulse unit IC6 and the forced switching command sent by the forced bypass module 40 are input into the first and gate IC4, and when the forced switching command is at a high level, the first and gate IC4 outputs the pulse signal, so that the power consumption is reduced and the energy is saved under the condition that the bypass switch 21 is normally turned on and off.
Meanwhile, the first input end of the first and gate IC4 may be connected to the inverter driving output end of the main control module 30, so as to reduce power consumption and save energy.
In some embodiments, the pulse unit IC6 is a 555 pulse circuit with a frequency of 33khz, and the output pulse signal of the first and gate also has a frequency of 33 khz.
In some embodiments, the UPS power supply further comprises: an inverter switch 11 and a second and gate IC 5.
And a first input end of the second and gate IC5 is connected with an inversion driving output end of the main control module 30, a second input end of the second and gate IC5 is connected with the pulse unit IC6, and an output end of the second and gate IC5 is connected with the inversion switch 11.
The UPS power supply includes an inverter switch 11, and the main control module 30 sends an inverter driving signal to the inverter switch 11 through an inverter driving output terminal to drive the inverter switch 11 to operate. And a second and gate IC5 is also arranged for the inverter switch 11 together with the bypass switch 21, and the pulse signal generated by the pulse unit IC6 and the inverter driving signal are input into the second and gate IC5 together, so that the power consumption is reduced and the energy is saved.
In some embodiments, the UPS power supply may further include: an inverter switch 11, a third and gate IC3, and a fourth and gate IC 2;
a third and gate IC3, a first input end of which is connected to the inversion driving output end of the main control module 30, a second input end of which is connected to the second end of the second resistor R8, and an output end of which is connected to the inversion switch 11;
and a fourth and gate IC2, a first input end of which is connected to the bypass driving output end of the main control module 30, a second input end of which is connected to the second end of the second resistor R8, and an output end of which is connected to the bypass switch 21.
And gates are arranged on a transmission path of the bypass driving signal and a transmission path of the inversion driving signal, when the forced bypass module 40 detects that the fault signal of the main control module 30 is at a low level, the second end of the second resistor R8 is at a low level, the third and gate IC3 and the fourth and gate IC2 both output low levels, the bypass driving signal and the inversion driving signal are blocked, only the forced bypass module 40 drives the bypass switch 21 to act, the UPS power supply is switched to a bypass state, and the switching action caused by signal interference and the switching influence on the working state of the UPS power supply are prevented.
In some embodiments, referring to fig. 3, the UPS power supply may further include: an inverting auxiliary drive module 12 and a bypass auxiliary drive module 22; the circuit structure of the inverter auxiliary driving module 12 is the same as that of the bypass auxiliary driving module 22.
The first end of the inversion auxiliary driving module 12 is connected with the inversion driving output end of the main control module 30, the second end of the inversion auxiliary driving module is connected with the inversion switch 11, the third end of the inversion auxiliary driving module is connected with the first input end of the third and gate IC3, and the fourth end of the inversion auxiliary driving module is connected with the output end of the third and gate IC 3;
a bypass auxiliary driving module 22, a first end of which is connected to the bypass driving output end of the main control module 30, a second end of which is connected to the bypass switch 21, a third end of which is connected to the first input end of the fourth and gate IC2, and a fourth end of which is connected to the output end of the fourth and gate IC 2;
the bypass auxiliary drive module 22 may include: a fourth resistor R2, a fifth resistor R3, a sixth resistor R4, a third capacitor C11 and a fourth capacitor C7.
A fourth resistor R2, having a first end connected to the first end of the bypass auxiliary driving module 22 and a second end connected to the third end of the bypass auxiliary driving module 22, the first end of the fifth resistor R3 and the first end of the third capacitor C11, respectively.
A first end of the sixth resistor R4 is connected to the fourth end of the bypass auxiliary driving module 22, and a second end thereof is connected to the second end of the bypass auxiliary driving module 22 and the first end of the fourth capacitor C7, respectively.
The second terminal of the fifth resistor R3, the second terminal of the third capacitor C11, and the second terminal of the fourth capacitor C7 are all grounded.
The circuit structure of the inversion auxiliary driving module 12 is the same as above, and is not described herein again, specifically referring to fig. 3.
In some embodiments, the fault signal output terminal of the main control module 30 may be a power supply terminal, the input terminal of the bypass module 40 is forced to be connected to the power supply terminal of the main control module 30, when the power supply terminal of the main control module 30 loses power, the switch tube Q1 is turned on until the bypass module 40 outputs a high level, and the bypass switch 21 is closed.
In some embodiments, the UPS power supply may further include: bypass main drive module and contravariant main drive module.
The input end of the bypass main driving module receives the bypass driving signal and the forced switching instruction, and drives the bypass switch 21 to act according to the bypass driving signal or the forced switching instruction. The input end of the inversion main driving module receives the inversion driving signal and drives the inversion switch 11 to act according to the inversion driving signal. The bypass main driving module and the inversion main driving module are used for improving the driving capability of the signals and preventing the driving capability of bypass driving signals, inversion driving instructions or forced switching instructions from being insufficient and the corresponding switching action cannot be driven.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A UPS power supply, comprising: the main circuit, the bypass switch, the main control module and the forced bypass module;
the main circuit and the bypass are respectively connected in series between a mains supply input and a load, and the bypass switch is connected in series in the bypass; the bypass driving output end of the main control module is connected with the bypass switch, and the power supply end of the main control module is connected with the first power supply end;
the input end of the forced bypass module is connected with the main control module, and the output end of the forced bypass module is connected with the bypass switch; the forced bypass module is used for receiving a fault signal of the main control module and sending a forced switching instruction to the bypass switch according to the fault signal; the forced switching instruction is used for indicating the action of the bypass switch;
the forced bypass module includes: the circuit comprises a switching tube, a first resistor, a second resistor, a third resistor and a first capacitor;
the first end of the switch tube is respectively connected with a second power supply end and the first end of the first resistor, the second end of the switch tube is respectively connected with the second end of the first resistor and the first end of the second resistor, and the third end of the switch tube is connected with the output end of the forced bypass module;
the second end of the second resistor is respectively connected with the first end of the third resistor, the first end of the first capacitor and the input end of the forced bypass module;
the second end of the third resistor is connected with the second power supply end; the second end of the first capacitor is grounded.
2. The UPS power supply of claim 1, further comprising: the transformer, the auxiliary power supply module and the main power supply module;
the primary side of the transformer is connected with a mains supply, the first secondary side of the transformer is connected with the input end of the main power supply module, and the second secondary side of the transformer is connected with the input end of the auxiliary power supply module;
the output end of the main power supply module is connected with the first power supply end, and the output end of the auxiliary power supply module is connected with the second power supply end.
3. The UPS power supply of claim 2, wherein the auxiliary power module comprises: the first unidirectional conducting element, the rectifier bridge and the voltage stabilizer;
the input end of the rectifier bridge is connected with the input end of the auxiliary power supply module, and the output end of the rectifier bridge is connected with the input end of the voltage stabilizer;
and the anode of the first one-way conduction element is connected with the output end of the voltage stabilizer, and the cathode of the first one-way conduction element is connected with the output end of the auxiliary power supply module.
4. The UPS power supply of claim 1, further comprising: a second one-way conduction element and a second capacitor;
the positive end of the second one-way conduction element is respectively connected with the first power supply end and the first end of the second capacitor, and the negative end of the second one-way conduction element is connected with the second power supply end;
and the negative end of the second capacitor is grounded.
5. The UPS power supply of claim 1, further comprising: a first AND gate and a pulse unit;
and the first input end of the first AND gate is connected with the output end of the forced bypass module, the second input end of the first AND gate is connected with the pulse unit, and the output end of the first AND gate is connected with the bypass switch.
6. The UPS power supply of claim 5, further comprising: the inversion switch and the second AND gate;
and the first input end of the second AND gate is connected with the inversion driving output end of the main control module, the second input end of the second AND gate is connected with the pulse unit, and the output end of the second AND gate is connected with the inversion switch.
7. The UPS power supply of claim 1, further comprising: the inverter switch, a third AND gate and a fourth AND gate;
a first input end of the third and gate is connected with an inversion driving output end of the main control module, a second input end of the third and gate is connected with a second end of the second resistor, and an output end of the third and gate is connected with the inversion switch;
and a first input end of the fourth AND gate is connected with a bypass driving output end of the main control module, a second input end of the fourth AND gate is connected with a second end of the second resistor, and an output end of the fourth AND gate is connected with the bypass switch.
8. The UPS power supply of claim 7, further comprising: the inverter auxiliary driving module and the bypass auxiliary driving module; the circuit structures of the inversion auxiliary driving module and the bypass auxiliary driving module are the same;
the first end of the inversion auxiliary driving module is connected with the inversion driving output end of the main control module, the second end of the inversion auxiliary driving module is connected with the inversion switch, the third end of the inversion auxiliary driving module is connected with the first input end of the third AND gate, and the fourth end of the inversion auxiliary driving module is connected with the output end of the third AND gate;
the first end of the bypass auxiliary driving module is connected with the bypass driving output end of the main control module, the second end of the bypass auxiliary driving module is connected with the bypass switch, the third end of the bypass auxiliary driving module is connected with the first input end of the fourth AND gate, and the fourth end of the bypass auxiliary driving module is connected with the output end of the fourth AND gate;
the bypass auxiliary drive module includes: a fourth resistor, a fifth resistor, a sixth resistor, a third capacitor and a fourth capacitor;
a first end of the fourth resistor is connected with the first end of the bypass auxiliary driving module, and a second end of the fourth resistor is respectively connected with a third end of the bypass auxiliary driving module, a first end of the fifth resistor and a first end of the third capacitor;
a first end of the sixth resistor is connected with a fourth end of the bypass auxiliary driving module, and a second end of the sixth resistor is respectively connected with a second end of the bypass auxiliary driving module and a first end of the fourth capacitor;
and the second end of the fifth resistor, the second end of the third capacitor and the second end of the fourth capacitor are all grounded.
9. The UPS power supply of any of claims 1-8, wherein the switching transistor is a triode;
and an emitter of the triode is connected with the first end of the first resistor, a base of the triode is connected with the second end of the first resistor, and a collector of the triode is connected with the output end of the forced bypass module.
10. The UPS power supply of any one of claims 2 to 3, wherein the output voltage of the auxiliary power module is +12V and the output voltage of the main power module is + 15V.
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| CN202020513218.8U CN212063614U (en) | 2020-04-09 | 2020-04-09 | UPS power supply |
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| CN202020513218.8U CN212063614U (en) | 2020-04-09 | 2020-04-09 | UPS power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112217277A (en) * | 2020-10-15 | 2021-01-12 | 石家庄通合电子科技股份有限公司 | UPS main bypass switching system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112217277A (en) * | 2020-10-15 | 2021-01-12 | 石家庄通合电子科技股份有限公司 | UPS main bypass switching system |
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