Switching circuit for uninterruptible power supply of server

Abstract

The utility model discloses a switching circuit for uninterruptible power supply of a server. The circuit comprises an MCU, a switching module (100), a current detection module (200), a voltage detection module (300) and a signal transmission module (400). The MCU is respectively connected with the switching module (100), the current detection module (200), the voltage detection module (300) and the signal transmission module (400); the switching module (100) is respectively connected with the mains supply and the standby power supply; and the current detection module (200) and the voltage detection module (300) are respectively connected with a standby power supply. The circuit provided by the utility model can detect the state of the connected standby power supply, can output the state information of the power supply, and has the advantages of strong stability and high safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to server power supply technical field, concretely is a kind of switching circuit for server uninterrupted power supply. BACKGROUND

[0002] With the birth and continuous development of Internet, the demand and sharing of information in various industries are also increasing, and cabinet server is widely used for its powerful computing and storage performance, providing computing and information services for various industries. The computing and storage capacity of the computer room built by cabinet server is huge, and if the computer room suddenly loses power, it will cause the termination of cabinet server operation and the loss of stored information, causing unnecessary losses. Therefore, a temporary power supply device is needed when the computer room loses power to ensure that the cabinet server in the computer room works uninterruptedly. In order to ensure the stable operation of the cabinet server in the computer room, the server cabinet generally uses the method of uninterruptible power supply (UPS) plus backup battery pack to realize the uninterrupted operation of the cabinet server. For example, the Chinese utility model patent with the authorization announcement number CN210183090U discloses an uninterrupted power supply circuit and an uninterrupted power supply device, which comprises: a main power supply circuit, which outputs a power supply voltage; an output circuit, which is used to receive the power supply voltage output by the main power supply circuit to supply power to the load; a power module; a switch control circuit; a switch, the power module is connected with the output circuit through the switch, and the controlled end of the switch is connected with the control end of the switch control circuit; the switch control circuit is also used to control the power module to supply power to the output circuit when the output voltage of the power module is greater than the output voltage of the output circuit; and control the power module to stop supplying power when the output voltage of the power module is less than the output voltage of the output circuit. However, when the mains power fails, the use of backup power supply generally cannot maintain for a long time, and if the mains power fails for a long time, a backup generator needs to be started to supply power. The utility model does not set a signal transmission module, so it is difficult for the staff to know the use of the backup power supply when the mains power fails, and there may be a situation where the backup power supply is exhausted before the backup generator is started. SUMMARY

[0003] The utility model aims at providing a kind of switching circuit for server uninterrupted power supply. The circuit of the utility model can detect the state of backup power supply connected, and can output power supply state information, with the advantages of strong stability and high safety.

[0004] The utility model discloses a technical scheme: a switching circuit for the uninterrupted power supply of server is applied to the power supply switching of standby power supply and commercial power of server, including MCU, switching module, current detection module, voltage detection module and signal transmission module, the MCU is connected with switching module, current detection module, voltage detection module and signal transmission module respectively, the switching module is connected with commercial power and standby power supply respectively, the current detection module and voltage detection module are connected with standby power supply respectively.

[0005] The switching module includes diode D3, diode D4, diode D5, diode D6, resistance R18, resistance R19, resistance R20, triode Q6, triode Q7, MOS tube M4 and MOS tube M5, the anode of diode D3 is connected with MCU, the cathode of diode D3 is connected with the base of triode Q6, the anode of diode D6 and the drain of MOS tube M5, the emitter of triode Q6 is grounded, the collector of triode Q6 is connected with the base of triode Q7 and one end of resistance R18 respectively, the emitter of triode Q7 is grounded, the collector of triode Q7 is connected with one end of resistance R19 and the gate of MOS tube M4, the source of MOS tube M4 is connected with the other end of resistance R18, the other end of resistance R19 and commercial power, the drain of MOS tube M4 is connected with the anode of diode D5, the anode of diode D4 and MCU, the cathode of diode D5 is connected with the cathode of diode D6, the cathode of diode D6 is connected with PDU, the cathode of diode D4 is connected with one end of resistance R20, the other end of resistance R20 is connected with the gate of MOS tube and is grounded, and the source of MOS tube M5 is connected with standby power supply.

[0006] The current detection module includes chip U1, resistance R10, resistance R11, resistance R12, voltage follower Q3 and capacitor C1, one end of resistance R12 is connected with standby power supply, the other end of resistance R12 is connected with the IP+ pin of chip U1 and the IP+ pin of chip U1 respectively, the IP- pin of chip U1 is connected with the IP- pin of chip U1 and is grounded respectively, one end of capacitor C1 is connected with the FILTER pin of chip U1, the other end of capacitor C1 is connected with the GND pin of chip U1 and is grounded, one end of resistance R10 is connected with the VIOUT pin of chip U1, the other end of resistance R10 is connected with the positive input end of voltage follower Q3, the opposite input end of voltage follower Q3 is connected with one end of resistance R11 and the output end of voltage follower Q3 and is connected with MCU, the other end of resistance R11 is grounded, the positive power end of voltage follower Q3 is connected with voltage source, and the negative power end of voltage follower Q3 is grounded.

[0007] The switching circuit for uninterrupted power supply of the foregoing server, the voltage detection module comprises a voltage follower Q4, an operational amplifier Q5, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a capacitor C2 and a MOS tube M3; one end of the resistor R14 is connected with the standby power supply; the other end of the resistor R14 is connected with one end of the resistor R13 and the non-inverting input terminal of the operational amplifier Q5; the inverting input terminal of the operational amplifier Q5 is connected with one end of the resistor R15, the other end of the resistor R15 is connected with one end of the capacitor C2 and grounded; the other end of the capacitor C2 is grounded; the positive power supply terminal of the operational amplifier Q5 is connected with a voltage source, and the negative power supply terminal of the operational amplifier Q5 is grounded; the output terminal of the operational amplifier Q5 is connected with the gate of the MOS tube M3; the source of the MOS tube M3 is connected with the other end of the resistor R13; the drain of the MOS tube M3 is connected with one end of the resistor R17 and the non-inverting input terminal of the voltage follower Q4; the other end of the resistor R17 is grounded; the inverting input terminal of the voltage follower Q4 is connected with one end of the resistor R16, the output terminal of the voltage follower Q4 and the MCU; the other end of the resistor R16 is grounded; the positive power supply terminal of the voltage follower Q4 is connected with a voltage source, and the negative power supply terminal of the voltage follower Q4 is grounded.

[0008] The aforementioned switching circuit for uninterrupted power supply of a server, the signal transmission module comprises a fuse F1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a diode D1, a diode D2, a triode Q1, a triode Q2, a MOS tube M1, a MOS tube M2 and a TVS tube TVS1; one end of the fuse F1 is connected with a signal interface, and the other end of the fuse F1 is connected with one end of the resistor R1; the other end of the resistor R1 is connected with one end of the resistor R2, one end of the resistor R5 and one end of the TVS tube TVS1; the other end of the TVS tube TVS1 is connected with the drain electrode of the MOS tube M1 and grounded; the other end of the resistor R2 is connected with the gate electrode of the MOS tube M1; the source electrode of the MOS tube M1 is connected with the negative electrode of the diode D1, and the positive electrode of the diode D1 is connected with one end of the resistor R3 and the gate electrode of the MOS tube M2; the source electrode of the MOS tube M2 is connected with the other end of the resistor R3 and connected with a voltage source; the drain electrode of the MOS tube M2 is connected with one end of the resistor R4 and the URT-RX pin of an MCU; the other end of the resistor R4 is grounded; the other end of the resistor R5 is connected with the collector electrode of the triode Q1; the emitter electrode of the triode Q1 is connected with one end of the resistor R6; the base electrode of the triode Q1 is connected with the other end of the resistor R6 and one end of the resistor R7; the other end of the resistor R7 is connected with the negative electrode of the diode D2; the negative electrode of the diode D2 is connected with the collector electrode of the triode Q2; the emitter electrode of the triode Q2 is connected with one end of the resistor R8 and connected with a voltage source; the base electrode of the triode Q2 is connected with the other end of the resistor R8 and one end of the resistor R9; the other end of the resistor R9 is connected with the URT-TX pin of the MCU.

[0009] Compared with the prior art, in use, the initial state is powered by commercial power, and when the commercial power fails, the standby power is switched to supply power; the current detection module is connected with the standby power source, used for detecting the current of the standby power source, and the detection result is transmitted to the MCU; the voltage detection module is connected with the standby power source, used for detecting the voltage of the standby power source, and the detection result is transmitted to the MCU; when the current detection module or the voltage detection module detects that the current or voltage of the standby power source fails, the MCU sends the standby power failure information to the worker through the signal transmission module, reminding the worker to handle it. The circuit of the utility model can detect the state of the standby power source, and can output the power state information, and has the advantages of high stability and high safety. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a structural schematic diagram of the utility model;

[0011] Figure 2 is a circuit diagram of the utility model.

[0012] The labels in the drawings are: 100-switching module, 200-current detection module, 300-voltage detection module, 400-signal transmission module. DETAILED DESCRIPTION

[0013] The utility model will be further explained in connection with the drawings and examples, but not as the basis for limiting the utility model.

[0014] Embodiment: switching circuit for server uninterrupted power supply, structure as Figure 1 And Figure 2 As shown in the figure, the application is applied to the power supply switching of the standby power supply and the commercial power of the server, including MCU, switching module 100, current detection module 200, voltage detection module 300 and signal transmission module 400;The MCU is connected with switching module 100, current detection module 200, voltage detection module 300 and signal transmission module 400 respectively;The switching module 100 is connected with the commercial power and the standby power supply respectively, and the switching module 100 is connected with PDU;The current detection module 200 and voltage detection module 300 are connected with the standby power supply respectively;The utility model in using, the initial state is powered by the commercial power, and when the commercial power fails, it is switched to the standby power supply for power supply;The current detection module 200 is connected with the standby power supply, is used for detecting the current of the standby power supply, and the detection result is delivered to the MCU;The voltage detection module 300 is connected with the standby power supply, is used for detecting the voltage of the standby power supply, and the detection result is delivered to the MCU;When the current detection module 200 or voltage detection module 300 detects that the current or voltage of the standby power supply has abnormal failure, the MCU sends the failure information of the standby power supply to the staff through signal transmission module 400, and reminds the staff to handle.The circuit of the utility model can detect the state of the standby power supply, and can output power supply state information, has the advantages of strong stability, high security.

[0015] The switching module 100 comprises diode D3, diode D4, diode D5, diode D6, resistor R18, resistor R19, resistor R20, triode Q6, triode Q7, MOS tube M4 and MOS tube M5; the positive electrode of the diode D3 is connected to the MCU, the negative electrode of the diode D3 is connected to the base electrode of the triode Q6, the positive electrode of the diode D6 and the drain electrode of the MOS tube M5, the emitter electrode of the triode Q6 is grounded, the collector electrode of the triode Q6 is connected to the base electrode of the triode Q7 and one end of the resistor R18 respectively; the emitter electrode of the triode Q7 is grounded, the collector electrode of the triode Q7 is connected to one end of the resistor R19 and the gate electrode of the MOS tube M4; the source electrode of the MOS tube M4 is connected to the other end of the resistor R18, the other end of the resistor R19 and the commercial power supply; the drain electrode of the MOS tube M4 is connected to the positive electrode of the diode D5, the positive electrode of the diode D4 and the MCU; the negative electrode of the diode D5 is connected to the negative electrode of the diode D6, and the negative electrode of the diode D6 is connected to the PDU; the negative electrode of the diode D4 is connected to one end of the resistor R20; the other end of the resistor R20 is connected to the gate electrode of the MOS tube and grounded; the source electrode of the MOS tube M5 is connected to the standby power supply. When the gate electrode of the MOS tube M5 is grounded through the resistor R1, the gate voltage of the first MOS tube M5 is low, the MOS tube M5 is turned on, and the standby power supply outputs power through the diode D6; in addition, the diode D6 can prevent voltage from flowing backward, which protects the circuit. When the collector voltage of the triode Q6 and the triode Q7 is high, the triode Q6 is turned on, the base voltage of the triode Q7 is low, the triode Q7 is turned on, the gate voltage of the MOS tube M4 is low, the MOS tube M4 is turned on, and the commercial power supply outputs power through the diode D5; in addition, the diode D5 can prevent voltage from flowing backward, which protects the circuit.

[0016] The current detection module 200 comprises a chip U1, a resistor R10, a resistor R11, a resistor R12, a voltage follower Q3 and a capacitor C1; one end of the resistor R12 is connected to a backup power supply; the other end of the resistor R12 is connected to an IP+ pin of the chip U1 and an IP+ pin of the chip U1 respectively; an IP- pin of the chip U1 is connected to an IP- pin of the chip U1 and grounded respectively; a FILTER pin of the chip U1 is connected to one end of the capacitor C1, and a GND pin of the chip U1 is connected to the other end of the capacitor C1 and grounded; a VIOUT pin of the chip U1 is connected to one end of the resistor R10, and the other end of the resistor R10 is connected to a non-inverting input end of the voltage follower Q3; an inverting input end of the voltage follower Q3 is connected to one end of the resistor R11, an output end of the voltage follower Q3 and an MCU; the other end of the resistor R11 is grounded; a positive power supply end of the voltage follower Q3 is connected to a voltage source, and a negative power supply end of the voltage follower Q3 is grounded. The chip U1 is a current sensor, the model number of which is ACS712, and the VIOUT pin of the chip U1 outputs a voltage to the voltage follower Q3.

[0017] The voltage detection module 300 comprises a voltage follower Q4, an operational amplifier Q5, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a capacitor C2 and a MOS tube M3; one end of the resistor R14 is connected to a backup power supply; the other end of the resistor R14 is connected to one end of the resistor R13 and a non-inverting input end of the operational amplifier Q5; an inverting input end of the operational amplifier Q5 is connected to one end of the resistor R15, and the other end of the resistor R15 is connected to one end of the capacitor C2 and grounded; the other end of the capacitor C2 is grounded; a positive power supply end of the operational amplifier Q5 is connected to a voltage source, and a negative power supply end of the operational amplifier Q5 is grounded; an output end of the operational amplifier Q5 is connected to a gate of the MOS tube M3; a source of the MOS tube M3 is connected to the other end of the resistor R13; a drain of the MOS tube M3 is connected to one end of the resistor R17 and a non-inverting input end of the voltage follower Q4; the other end of the resistor R17 is grounded; an inverting input end of the voltage follower Q4 is connected to one end of the resistor R16, an output end of the voltage follower Q4 and an MCU; the other end of the resistor R16 is grounded; a positive power supply end of the voltage follower Q4 is connected to a voltage source, and a negative power supply end of the voltage follower Q4 is grounded. When the circuit is in an initial state, the voltage of the inverting input end of the operational amplifier Q5 is greater than the voltage of the non-inverting input end, the output end of the operational amplifier Q5 outputs a low level, the MOS tube M3 is turned on, due to the voltage division of the resistor R17, the voltage of the inverting input end of the operational amplifier Q5 decreases, at this time, the voltage of the inverting input end of the operational amplifier Q5 is less than the voltage of the non-inverting input end, the output voltage of the operational amplifier Q5 rises, and after reaching balance, the voltage of the inverting input end of the operational amplifier Q5 is equal to the voltage of the non-inverting input end.

[0018] The signal transmission module 400 comprises a fuse F1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a diode D1, a diode D2, a triode Q1, a triode Q2, a MOS tube M1, a MOS tube M2 and a TVS tube TVS1; one end of the fuse F1 is connected with a signal interface, and the other end of the fuse F1 is connected with one end of the resistor R1; the other end of the resistor R1 is connected with one end of the resistor R2, one end of the resistor R5 and one end of the TVS tube TVS1; the other end of the TVS tube TVS1 is connected with the drain electrode of the MOS tube M1 and grounded; the other end of the resistor R2 is connected with the gate electrode of the MOS tube M1; the source electrode of the MOS tube M1 is connected with the negative electrode of the diode D1, and the positive electrode of the diode D1 is connected with one end of the resistor R3 and the gate electrode of the MOS tube M2; the source electrode of the MOS tube M2 is connected with the other end of the resistor R3 and a voltage source; the drain electrode of the MOS tube M2 is connected with one end of the resistor R4 and the URT-RX pin of the MCU; the other end of the resistor R4 is grounded; the other end of the resistor R5 is connected with the collector electrode of the triode Q1; the emitter electrode of the triode Q1 is connected with one end of the resistor R6; the base electrode of the triode Q1 is connected with the other end of the resistor R6 and one end of the resistor R7; the other end of the resistor R7 is connected with the negative electrode of the diode D2; the negative electrode of the diode D2 is connected with the collector electrode of the triode Q2; the emitter electrode of the triode Q2 is connected with one end of the resistor R8 and a voltage source; the base electrode of the triode Q2 is connected with the other end of the resistor R8 and one end of the resistor R9; the other end of the resistor R9 is connected with the URT-TX pin of the MCU. The MCU can send the state information of the standby power supply to the worker through the signal transmission module 400, so that the normal use of the standby power supply is facilitated. The fuse F1 can effectively protect the signal transmission module 400.

[0019] Working principle: in use, the initial state is powered by the mains, and when the mains fails, the standby power supply is switched to power supply; the current detection module 200 is connected with the standby power supply, used for detecting the current of the standby power supply, and the detection result is transmitted to the MCU; the voltage detection module 300 is connected with the standby power supply, used for detecting the voltage of the standby power supply, and the detection result is transmitted to the MCU; when the current detection module 200 or the voltage detection module 300 detects that the current or voltage of the standby power supply is abnormal, the MCU sends the fault information of the standby power supply to the worker through the signal transmission module 400, reminding the worker to handle. The circuit of the utility model can detect the state of the standby power supply, and can output the power supply state information, and has the advantages of strong stability and high safety.

[0020] The above embodiment only expresses the implementation mode of the utility model, and the description is relatively specific and detailed, but cannot be understood as the limitation of the utility model patent range, and in the embodiment, up, down, left, right, front and back only represent relative positions and do not represent absolute positions. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A switching circuit for uninterruptible power supply to a server, used for switching between backup power and mains power supply to the server, characterized in that: It includes MCU, switching module (100), current detection module (200), voltage detection module (300) and signal transmission module (400); the MCU is connected with switching module (100), current detection module (200), voltage detection module (300) and signal transmission module (400) respectively; the switching module (100) is connected with mains and standby power supply respectively; the current detection module (200) and voltage detection module (300) are connected with standby power supply respectively; The switching module (100) includes diode D3, diode D4, diode D5, diode D6, resistance R18, resistance R19, resistance R20, triode Q6, triode Q7, MOS tube M4 and MOS tube M5; the positive electrode of diode D3 is connected with MCU, the negative electrode of diode D3 is connected with the base electrode of triode Q6, the positive electrode of diode D6 and the drain electrode of MOS tube M5, the emitter electrode of triode Q6 is grounded, the collector electrode of triode Q6 is connected with the base electrode of triode Q7 and one end of resistance R18 respectively; the emitter electrode of triode Q7 is grounded, the collector electrode of triode Q7 is connected with one end of resistance R19 and the gate electrode of MOS tube M4; the source electrode of MOS tube M4 is connected with the other end of resistance R18, the other end of resistance R19 and mains; the drain electrode of MOS tube M4 is connected with the positive electrode of diode D5, the positive electrode of diode D4 and MCU; the negative electrode of diode D5 is connected with the negative electrode of diode D6, the negative electrode of diode D6 is connected with PDU; the negative electrode of diode D4 is connected with one end of resistance R20; the other end of resistance R20 is connected with the gate electrode of MOS tube and grounded; the source electrode of MOS tube M5 is connected with standby power supply.

2. The switchover circuit for uninterrupted power supply of servers according to claim 1, characterized in that: The current detection module (200) includes chip U1, resistance R10, resistance R11, resistance R12, voltage follower Q3 and capacitor C1; one end of resistance R12 is connected with standby power supply; the other end of resistance R12 is connected with the IP+ pin of chip U1 and the IP+ pin of chip U1 respectively; the IP- pin of chip U1 is connected with the IP- pin of chip U1 and grounded respectively; the FILTER pin of chip U1 is connected with one end of capacitor C1, the GND pin of chip U1 is connected with the other end of capacitor C1 and grounded; the VIOUT pin of chip U1 is connected with one end of resistance R10, the other end of resistance R10 is connected with the positive phase input end of voltage follower Q3; the inverting input end of voltage follower Q3 is connected with one end of resistance R11, the output end of voltage follower Q3 and MCU; the other end of resistance R11 is grounded; the positive power supply end of voltage follower Q3 is connected with voltage source, the negative power supply end of voltage follower Q3 is grounded.

3. The switchover circuit for uninterrupted power supply of servers according to claim 1, characterized in that: The voltage detection module (300) comprises a voltage follower Q4, an operational amplifier Q5, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a capacitor C2 and a MOS tube M3; one end of the resistor R14 is connected with a standby power supply; the other end of the resistor R14 is connected with one end of the resistor R13 and the non-inverting input terminal of the operational amplifier Q5; the inverting input terminal of the operational amplifier Q5 is connected with one end of the resistor R15, the other end of the resistor R15 is connected with one end of the capacitor C2 and grounded; the other end of the capacitor C2 is grounded; the positive power supply terminal of the operational amplifier Q5 is connected with a voltage source, and the negative power supply terminal of the operational amplifier Q5 is grounded; the output terminal of the operational amplifier Q5 is connected with the gate of the MOS tube M3; the source of the MOS tube M3 is connected with the other end of the resistor R13; the drain of the MOS tube M3 is connected with one end of the resistor R17 and the non-inverting input terminal of the voltage follower Q4; the other end of the resistor R17 is grounded; the inverting input terminal of the voltage follower Q4 is connected with one end of the resistor R16, the output terminal of the voltage follower Q4 and an MCU; the other end of the resistor R16 is grounded; the positive power supply terminal of the voltage follower Q4 is connected with a voltage source, and the negative power supply terminal of the voltage follower Q4 is grounded.

4. The switchover circuit for uninterrupted power supply of servers according to claim 1, characterized in that: The signal transmission module (400) comprises a fuse F1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a diode D1, a diode D2, a triode Q1, a triode Q2, a MOS tube M1, a MOS tube M2 and a TVS tube TVS1; one end of the fuse F1 is connected with a signal interface, and the other end of the fuse F1 is connected with one end of the resistor R1; the other end of the resistor R1 is connected with one end of the resistor R2, one end of the resistor R5 and one end of the TVS tube TVS1; the other end of the TVS tube TVS1 is connected with the drain of the MOS tube M1 and grounded; the other end of the resistor R2 is connected with the gate of the MOS tube M1; the source of the MOS tube M1 is connected with the negative electrode of the diode D1, the positive electrode of the diode D1 is connected with one end of the resistor R3 and the gate of the MOS tube M2; the source of the MOS tube M2 is connected with the other end of the resistor R3 and a voltage source; the drain of the MOS tube M2 is connected with one end of the resistor R4 and the URT-RX pin of an MCU; the other end of the resistor R4 is grounded; the other end of the resistor R5 is connected with the collector of the triode Q1; the emitter of the triode Q1 is connected with one end of the resistor R6; the base of the triode Q1 is connected with the other end of the resistor R6 and one end of the resistor R7; the other end of the resistor R7 is connected with the negative electrode of the diode D2; the negative electrode of the diode D2 is connected with the collector of the triode Q2; the emitter of the triode Q2 is connected with one end of the resistor R8 and a voltage source; the base of the triode Q2 is connected with the other end of the resistor R8 and one end of the resistor R9; the other end of the resistor R9 is connected with the URT-TX pin of the MCU.

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