A high-power power supply temperature controller

Abstract

The utility model discloses a kind of high-power power supply temperature controller, it is related to power supply temperature control technical field, comprising: multichannel high-precision temperature acquisition circuit, high-speed operational amplifier comparison operation circuit and intelligent grading fan control circuit;The intelligent grading fan control circuit electrically connected multichannel high-precision temperature acquisition circuit and high-speed operational amplifier comparison operation circuit;The multichannel high-precision temperature acquisition circuit, including four PT100 temperature sensors;It is respectively deployed in power supply key heating area.The technical problem to be solved by the utility model is to provide a kind of high-power power supply temperature controller, by operational amplifier comparator to multichannel thyristor grading control, and then drive multichannel fan to realize dynamic temperature regulation and control, can realize energy-saving heat dissipation effect according to different power state of power supply, significantly improve the energy-saving nature and stability of power supply operation.

Description

Technical Field

[0001] This utility model relates to the field of power supply temperature control technology, specifically to a high-power power supply temperature controller. Background Technology

[0002] High-power power supplies typically refer to power devices with high output power, and are widely used in industries such as industry, communications, scientific research, and medicine. High-power power supplies require temperature control.

[0003] The existing technology has the following shortcomings:

[0004] Insufficient temperature detection coverage: Traditional temperature control circuits often use 1-2 temperature acquisition designs, which are difficult to fully reflect the complex heat distribution inside a high-power power supply and easily overlook the risk of local overheating.

[0005] Significant temperature response lag: Ordinary temperature control chips (such as DS18B20) have low sampling rates, which cannot meet the real-time monitoring needs of highly dynamic temperature environments.

[0006] Single fan control mode: Existing solutions typically only adjust the speed of a single fan, and cannot achieve multi-dimensional heat dissipation control based on the temperature gradient of different areas.

[0007] Insufficient anti-interference capability: Current mainstream microcontroller control schemes are prone to problems such as program crashes and system freezes under strong electromagnetic interference in high-power power supply environments, which seriously affects the reliability of power supply operation. Utility Model Content

[0008] The technical problem to be solved by this utility model is to provide a high-power power supply temperature controller, which uses operational amplifiers and comparators to perform hierarchical control of multiple thyristors, thereby driving multiple fans to achieve dynamic temperature regulation. It can achieve energy-saving heat dissipation effect according to different power states of the power supply, and significantly improve the energy efficiency and stability of the power supply operation.

[0009] This utility model achieves its invention objective using the following technical solution:

[0010] A high-power power supply temperature controller is characterized by comprising: a multi-channel high-precision temperature acquisition circuit, a high-speed operational amplifier comparison and operation circuit, and an intelligent graded fan control circuit; the intelligent graded fan control circuit is electrically connected to the multi-channel high-precision temperature acquisition circuit and the high-speed operational amplifier comparison and operation circuit; the multi-channel high-precision temperature acquisition circuit includes four PT100 temperature sensors, which are respectively deployed in the key heat-generating areas of the power supply.

[0011] As a further limitation of this technical solution, the PT100 temperature sensor is a thermistor. Thermistor 1 is electrically connected to signal connector J1 and power connector J2; thermistor 2 is electrically connected to signal connector J3 and power connector J4; thermistor 3 is electrically connected to signal connector J5 and power connector J6; thermistor 4 is electrically connected to signal connector J7 and power connector J8. Signal connector J1 is electrically connected to pin 3 of integrated operational amplifier U3A and one end of resistor R3. Pin 1 of integrated operational amplifier U3A is electrically connected to diode D1 and one end of resistor R2. The other end of resistor R2 is electrically connected to one end of diode D25. Pin 2 of integrated operational amplifier U3A is electrically connected to one end of resistor R1. Signal connector J3 is electrically connected to pin 5 of integrated operational amplifier U3B and one end of resistor R6. Pin 7 of integrated operational amplifier U3B is electrically connected to diode D2 and resistor R6. One end of resistor R5 is electrically connected to one end of diode D26; pin 6 of integrated operational amplifier U3B is electrically connected to one end of resistor R4; signal connector J5 is electrically connected to pin 10 of integrated operational amplifier U3C and one end of resistor R9; pin 8 of integrated operational amplifier U3C is electrically connected to one end of diode D3 and resistor R8; the other end of resistor R8 is electrically connected to one end of diode D27; pin 9 of integrated operational amplifier U3C is electrically connected to one end of resistor R7; signal connector J7 is electrically connected to pin 12 of integrated operational amplifier U3D and one end of resistor R12; pin 14 of integrated operational amplifier U3D is electrically connected to one end of diode D4 and resistor R11; the other end of resistor R11 is electrically connected to one end of diode D28; and pin 13 of integrated operational amplifier U3D is electrically connected to one end of resistor R10.

[0012] As a further limitation of this technical solution, the intelligent graded fan control circuit includes a chip IC12. Pin 3 of the chip IC12 is electrically connected to the positive terminal J11, pin 4 of the chip IC12 is electrically connected to the negative terminal J10, pin 1 of the chip IC12 is electrically connected to resistors R87 and R86, resistor R86 is electrically connected to resistor R34, diode D33, and pin 3 of transistor Q9, diode D33 is electrically connected to one end of resistor R88, pins 1 and 2 of transistor Q9 are respectively electrically connected to one end of resistor R85, and pin 1 of transistor Q9 is electrically connected to one end of resistor R84. The other end of resistor R84 is electrically connected to pin 1 of shunt regulator V3. Pin 2 of shunt regulator V3 is electrically connected to capacitor C24, one end of resistor R82 and resistor R83, and the other end of resistor R34. The other end of resistor R82 is electrically connected to one end of capacitor C23 and pin 1 of adjustable resistor P3. Pins 2 and 3 of adjustable resistor P3 are electrically connected to one end of resistor R15. The other ends of resistor R1, diode D1, resistor R4, diode D2, resistor R7, diode D3, resistor R10, and diode D4 are electrically connected to the other end of resistor R15.

[0013] As a further limitation of this technical solution, the intelligent graded fan control circuit includes a chip U5. Pin 1 of the chip U5 is electrically connected to one end of resistors R89 and R91. The other end of resistor R89 ​​is electrically connected to pin 3 of diode D34 and transistor Q10. The other end of diode D34 is electrically connected to one end of resistor R90. Pins 1 and 2 of transistor Q10 are respectively electrically connected to one end of resistor R81. Pin 1 of transistor Q10 is electrically connected to one end of resistor R79. The other end of resistor R79 is electrically connected to pin 1 of shunt regulator V1. Pin 3 of transistor Q10 is electrically connected to resistor R79. One end of R80-1 is electrically connected to one end of resistor R80. The other end of resistor R80 is electrically connected to pin 2 of shunt regulator V1. Pin 2 of shunt regulator V1 is electrically connected to one end of capacitor C26, resistor R78, and resistor R77. The other end of resistor R78 is electrically connected to one end of resistor R78-2. The other end of resistor R77 is electrically connected to one end of capacitor C25 and pin 1 of adjustable resistor P2. Pins 2 and 3 of adjustable resistor P2 are electrically connected to one end of resistor R14. The other end of resistor R14 is electrically connected to the other end of resistor R15.

[0014] As a further limitation of this technical solution, pin 4 of chip U5 is electrically connected to resistor R93 and bidirectional thyristor ZK1, pin 5 of chip U5 is electrically connected to resistor R92, resistor R93 and bidirectional thyristor ZK1 are electrically connected to fan connector J15, fan connector J31 and fan connector J32 respectively, resistor R92 and bidirectional thyristor ZK1 are electrically connected to one end of capacitor C22, the other end of capacitor C22 is electrically connected to one end of resistor R94, and the other end of resistor R94 is electrically connected to fan connector J15, fan connector J31 and fan connector J32 respectively.

[0015] As a further limitation of this technical solution, the high-speed operational amplifier comparison circuit includes voltage comparators U4A, U4B, U4C, and U4D. Pin 2 of voltage comparator U4A is electrically connected to one end of resistor R24. The other end of resistor R24 ​​is electrically connected to one end of resistors R20, R20-2, and R19. Resistor R20-2 is electrically connected to one end of resistor R20-1. Pin 6 of voltage comparator U4B is electrically connected to one end of resistor R25. Resistor R25 is electrically connected to... Connect one end of resistor R21 and resistor R21-2; connect the other end of resistor R25 to resistor R20 and resistor R20-1; connect pin 9 of voltage comparator U4C to one end of resistor R26; connect resistor R26 to one end of resistor R22 and resistor R22-2; connect the other end of resistor R21 and resistor R21-2; connect pin 13 of voltage comparator U4D to one end of resistor R27; connect resistor R27 to... Connect one end of resistor R23 and resistor R22-3. Resistor R27 is electrically connected to the other end of resistor R22. The other end of resistor R22-3 is electrically connected to the other end of resistor R22-2. Pin 3 of voltage comparator U4A, pin 5 of voltage comparator U4B, pin 10 of voltage comparator U4C, and pin 12 of voltage comparator U4D are respectively electrically connected to one end of capacitor C10 and resistor R13. The other end of resistor R13 is electrically connected to resistor R... At the other end of 15, the other end of resistor R19 is electrically connected to pin 3 of adjustable resistor P1. Pins 1 and 2 of adjustable resistor P1 are electrically connected to resistor R17, resistor R16, capacitor C7 and pin 1 of shunt regulator V1, respectively. Pins 1 and 2 of adjustable resistor P1 are electrically connected to power connector J2, power connector J4, power connector J6 and power connector J8, respectively. Pin 2 of shunt regulator V1 is electrically connected to one end of resistor R18 and the other end of resistor R17.

[0016] As a further limitation of this technical solution, pin 2 of the voltage comparator U4A is electrically connected to one end of diode D5, the other end of diode D5 is electrically connected to one end of resistor R28, the other end of resistor R28 is electrically connected to one end of resistor R28-2, pin 1 of the voltage comparator U4A is electrically connected to one end of resistor R29, the other end of resistor R29 is electrically connected to one end of resistors R30, R44, and R45, the other end of resistor R45 is electrically connected to one end of diode D13, and the other end of resistor R44 and diode D13... The other end of the resistor R30 is electrically connected to one end of capacitor C11, and the other end of resistor R30 is electrically connected to one end of resistor R31 and the pin G of transistor Q1. The pin 7 of voltage comparator U4B is electrically connected to one end of resistor R32. The other end of resistor R32 is electrically connected to resistors R33, R46, R47, and one end of diode D6. The other end of resistor R33 is electrically connected to resistor R96 and the pin G of transistor Q3. The other end of resistor R47 is electrically connected to one end of diode D14. Resistor R46 and the... The other end of transistor D14 and pin G of transistor Q4 are electrically connected to one end of capacitor C12; pin 8 of voltage comparator U4C is electrically connected to one end of resistor R36; the other end of resistor R36 is electrically connected to one end of resistors R37, R48, R49, diode D8, and diode D9; the other end of resistor R37 is electrically connected to resistor R38 and pin G of transistor Q5; the other end of resistor R49 is electrically connected to one end of diode D15; the other ends of resistor R48 and diode D15, and pin G of transistor Q6 are electrically connected to... One end of capacitor C13 is electrically connected; pin 14 of voltage comparator U4D is electrically connected to one end of resistor R40; the other end of resistor R40 is electrically connected to one end of resistors R42, R50, R51, diodes D10, D11, and D12; the other end of resistor R42 is electrically connected to resistor R43 and pin G of transistor Q7; the other end of resistor R51 is electrically connected to one end of diode D16; the other ends of resistor R50 and diode D16, and pin G of transistor Q8 are respectively electrically connected to one end of capacitor C14.Pin 6 of voltage comparator U4B is electrically connected to one end of diode D7. The other end of diode D7 is electrically connected to one end of resistor R35. The other end of resistor R35 is electrically connected to resistor R35-1. Pin 10 of voltage comparator U4C is electrically connected to one end of diode D12. The other end of diode D12 is electrically connected to one end of resistor R39. Pin 13 of voltage comparator U4D is electrically connected to one end of resistor R41. The other ends of resistor R28-2, diode D6, diode D8, and diode D11 are respectively electrically connected to pin D of transistor Q1. 35-1. The other ends of diodes D9 and D10 are electrically connected to pin D of transistor Q3, respectively. The other ends of resistor R39 and capacitor D12 are electrically connected to pin D of transistor Q5, respectively. The other end of resistor R41 is electrically connected to pin D of transistor Q7. Pins S of transistors Q1, Q3, Q5, and Q7 are electrically connected to resistor R95 and diode W1, respectively. Diode W1 is electrically connected to diode W2. Pins S of transistors Q2 and Q4 are electrically connected to... Pin S of transistor Q6 and pin S of transistor Q8 are electrically connected to pins 1 and 2 of shunt regulator V4, respectively. Pin 2 of shunt regulator V4 is electrically connected to resistor R64. Pin D of transistor Q2 is electrically connected to one end of resistor R52. The other end of resistor R52 is electrically connected to resistor R53 and pin 2 of chip U6. The other end of resistor R53 is electrically connected to resistor R54, diode D29, and pin 1 of chip U6. Pin D of transistor Q4 is electrically connected to one end of resistor R55. The other end of resistor R55 is electrically connected to resistor R56 and pin 2 of chip U7. The other end is electrically connected to resistor R57, diode D30, and pin 1 of chip U7. Pin D of transistor Q6 is electrically connected to one end of resistor R58. The other end of resistor R58 is electrically connected to resistor R59 and pin 2 of chip U8. The other end of resistor R59 is electrically connected to resistor R60, diode D31, and pin 1 of chip U8. Pin D of transistor Q8 is electrically connected to one end of resistor R61. The other end of resistor R61 is electrically connected to resistor R62 and pin 2 of chip U9. The other end of resistor R62 is electrically connected to resistor R63, diode D32, and pin 1 of chip U9.

[0017] As a further limitation of this technical solution, pin 4 of the voltage comparator U4A is electrically connected to one end of capacitor C8, and pin 11 of the integrated operational amplifier U4A is electrically connected to one end of capacitor C9.

[0018] As a further limitation of this technical solution, pin 4 of the integrated operational amplifier U3A is electrically connected to one end of capacitor C1, and pin 11 of the integrated operational amplifier U3A is electrically connected to one end of capacitor C2.

[0019] Compared with related technologies, the high-power power supply temperature controller provided by this utility model has the following beneficial effects:

[0020] (1) Full-area temperature monitoring: 4-channel PT100 fully covers key heat-generating components of the power supply, effectively avoiding equipment failure caused by local overheating.

[0021] (2) Extremely fast response characteristics: The signal processing delay of the operational amplifier comparator circuit is less than 10ms, and the response speed is significantly better than the traditional microcontroller software processing scheme.

[0022] (3) Energy-saving and noise-reducing design: The graded fan control mode reduces ineffective heat dissipation energy consumption, while reducing fan mechanical wear and extending equipment service life.

[0023] (4) Strong anti-interference capability: The all-analog circuit architecture does not rely on a microcontroller and can still operate stably in strong electromagnetic interference environment, improving the reliability of power supply operation. Attached Figure Description

[0024] Figure 1 The principle of the local circuit of this utility model Figure One .

[0025] Figure 2 The principle of the local circuit of this utility model Figure Two . Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] A high-power power supply temperature controller includes: a multi-channel high-precision temperature acquisition circuit, a high-speed operational amplifier comparison and operation circuit, and an intelligent graded fan control circuit. The intelligent graded fan control circuit is electrically connected to the multi-channel high-precision temperature acquisition circuit and the high-speed operational amplifier comparison and operation circuit. The multi-channel high-precision temperature acquisition circuit includes four PT100 temperature sensors, which are respectively deployed in key heat-generating areas of the power supply (including MOSFET power devices, high-frequency transformers, rectifier bridge modules, and output filter capacitor banks). Each PT100 uses a TL431 to provide a reference voltage source. The PT100 is divided by a voltage divider resistor. The resistance of the PT100 is different at different temperatures, thus converting the temperature into a voltage signal.

[0028] The PT100 temperature sensor is a thermistor. Thermistor 1 is electrically connected to signal connector J1 and power connector J2; thermistor 2 is electrically connected to signal connector J3 and power connector J4; thermistor 3 is electrically connected to signal connector J5 and power connector J6; and thermistor 4 is electrically connected to signal connector J7 and power connector J8. Signal connector J1 is electrically connected to pin 3 of integrated operational amplifier U3A and one end of resistor R3. Pin 1 of integrated operational amplifier U3A is electrically connected to diode D1 and one end of resistor R2. The other end of resistor R2 is electrically connected to one end of diode D25. Pin 2 of integrated operational amplifier U3A is electrically connected to one end of resistor R1. Signal connector J3 is electrically connected to pin 5 of integrated operational amplifier U3B and one end of resistor R6. Pin 7 of integrated operational amplifier U3B is electrically connected to diode D2 and one end of resistor R5. The other end of resistor R5 is electrically connected to one end of diode D26. Pin 6 of the integrated operational amplifier U3B is electrically connected to one end of resistor R4. Signal connector J5 is electrically connected to pin 10 of integrated operational amplifier U3C and one end of resistor R9. Pin 8 of integrated operational amplifier U3C is electrically connected to one end of diode D3 and resistor R8. The other end of resistor R8 is electrically connected to one end of diode D27. Pin 9 of integrated operational amplifier U3C is electrically connected to one end of resistor R7. Signal connector J7 is electrically connected to pin 12 of integrated operational amplifier U3D and one end of resistor R12. Pin 14 of integrated operational amplifier U3D is electrically connected to one end of diode D4 and resistor R11. The other end of resistor R11 is electrically connected to one end of diode D28. Pin 13 of integrated operational amplifier U3D is electrically connected to one end of resistor R10.

[0029] The intelligent graded fan control circuit includes a chip IC12. Pin 3 of the chip IC12 is electrically connected to the positive terminal J11, pin 4 of the chip IC12 is electrically connected to the negative terminal J10, pin 1 of the chip IC12 is electrically connected to resistors R87 and R86, resistor R86 is electrically connected to resistor R34, diode D33, and pin 3 of transistor Q9, diode D33 is electrically connected to one end of resistor R88, pins 1 and 2 of transistor Q9 are electrically connected to one end of resistor R85, pin 1 of transistor Q9 is electrically connected to one end of resistor R84, and the other end of resistor R84... The pin 1 of the shunt regulator V3 is electrically connected. The pin 2 of the shunt regulator V3 is electrically connected to one end of capacitor C24, resistor R82, and resistor R83, and the other end of resistor R34. The other end of resistor R82 is electrically connected to one end of capacitor C23 and pin 1 of adjustable resistor P3. Pins 2 and 3 of adjustable resistor P3 are electrically connected to one end of resistor R15. The other ends of resistor R1, diode D1, resistor R4, diode D2, resistor R7, diode D3, resistor R10, and diode D4 are electrically connected to the other end of resistor R15.

[0030] The intelligent graded fan control circuit includes a chip U5. Pin 1 of chip U5 is electrically connected to one end of resistors R89 and R91. The other end of resistor R89 ​​is electrically connected to pin 3 of diode D34 and transistor Q10. The other end of diode D34 is electrically connected to one end of resistor R90. Pins 1 and 2 of transistor Q10 are electrically connected to one end of resistor R81. Pin 1 of transistor Q10 is electrically connected to one end of resistor R79. The other end of resistor R79 is electrically connected to pin 1 of shunt regulator V1. Pin 3 of transistor Q10 is electrically connected to one end of resistor R80-1. One end of resistor R80-1 is electrically connected to one end of resistor R80. The other end of resistor R80 is electrically connected to pin 2 of shunt regulator V1. Pin 2 of shunt regulator V1 is electrically connected to one end of capacitor C26, resistor R78, and resistor R77. The other end of resistor R78 is electrically connected to one end of resistor R78-2. The other end of resistor R77 is electrically connected to one end of capacitor C25 and pin 1 of adjustable resistor P2. Pins 2 and 3 of adjustable resistor P2 are electrically connected to one end of resistor R14. The other end of resistor R14 is electrically connected to the other end of resistor R15.

[0031] Pin 4 of chip U5 is electrically connected to resistor R93 and bidirectional thyristor ZK1. Pin 5 of chip U5 is electrically connected to resistor R92. Resistor R93 and bidirectional thyristor ZK1 are electrically connected to fan connectors J15, J31, and J32, respectively. Resistor R92 and bidirectional thyristor ZK1 are electrically connected to one end of capacitor C22. The other end of capacitor C22 is electrically connected to one end of resistor R94. The other end of resistor R94 is electrically connected to fan connectors J15, J31, and J32, respectively.

[0032] The high-speed operational amplifier comparison circuit includes voltage comparators U4A, U4B, U4C, and U4D. Pin 2 of voltage comparator U4A is electrically connected to one end of resistor R24. The other end of resistor R24 ​​is electrically connected to one end of resistors R20, R20-2, and R19. Resistor R20-2 is electrically connected to one end of resistor R20-1. Pin 6 of voltage comparator U4B is electrically connected to one end of resistor R25. Resistor R25 is electrically connected to resistors R21 and R2... One end of resistor R25 is electrically connected to the other end of resistor R20 and resistor R20-1. Pin 9 of voltage comparator U4C is electrically connected to one end of resistor R26. Resistor R26 is electrically connected to one end of resistor R22 and resistor R22-2. Resistor R26 is electrically connected to the other end of resistor R21 and resistor R21-2. Pin 13 of voltage comparator U4D is electrically connected to one end of resistor R27. Resistor R27 is electrically connected to resistor R23. One end of resistor R22-3 is connected to resistor R27, the other end of resistor R22-3 is connected to the other end of resistor R22-2, pin 3 of voltage comparator U4A, pin 5 of voltage comparator U4B, pin 10 of voltage comparator U4C, and pin 12 of voltage comparator U4D are respectively electrically connected to capacitor C10 and one end of resistor R13, and the other end of resistor R13 is connected to the other end of resistor R15. One end of the resistor R19 is electrically connected to pin 3 of the adjustable resistor P1. Pins 1 and 2 of the adjustable resistor P1 are electrically connected to resistor R17, resistor R16, capacitor C7, and pin 1 of the shunt regulator V1, respectively. Pins 1 and 2 of the adjustable resistor P1 are electrically connected to power connector J2, power connector J4, power connector J6, and power connector J8, respectively. Pin 2 of the shunt regulator V1 is electrically connected to one end of resistor R18 and the other end of resistor R17.

[0033] Pin 2 of the voltage comparator U4A is electrically connected to one end of diode D5. The other end of diode D5 is electrically connected to one end of resistor R28. The other end of resistor R28 is electrically connected to one end of resistor R28-2. Pin 1 of the voltage comparator U4A is electrically connected to one end of resistor R29. The other end of resistor R29 is electrically connected to one end of resistors R30, R44, and R45. The other end of resistor R45 is electrically connected to one end of diode D13. The other ends of resistor R44 and diode D13, and the pin of transistor Q2 are... Pin G is electrically connected to one end of capacitor C11. The other end of resistor R30 is electrically connected to one end of resistor R31 and pin G of transistor Q1. Pin 7 of voltage comparator U4B is electrically connected to one end of resistor R32. The other end of resistor R32 is electrically connected to one end of resistors R33, R46, R47, and diode D6. The other end of resistor R33 is electrically connected to resistor R96 and pin G of transistor Q3. The other end of resistor R47 is electrically connected to one end of diode D14. The other end of resistor R46 and diode D14... One end of the transistor Q4 and pin G are electrically connected to one end of capacitor C12; pin 8 of the voltage comparator U4C is electrically connected to one end of resistor R36; the other end of resistor R36 is electrically connected to one end of resistors R37, R48, R49, diode D8, and diode D9; the other end of resistor R37 is electrically connected to resistor R38 and pin G of transistor Q5; the other end of resistor R49 is electrically connected to one end of diode D15; the other ends of resistor R48 and diode D15, and pin G of transistor Q6 are electrically connected to... One end of capacitor C13; pin 14 of voltage comparator U4D is electrically connected to one end of resistor R40; the other end of resistor R40 is electrically connected to one end of resistors R42, R50, R51, diodes D10, D11, and D12; the other end of resistor R42 is electrically connected to resistor R43 and pin G of transistor Q7; the other end of resistor R51 is electrically connected to one end of diode D16; the other ends of resistor R50 and diode D16, and pin G of transistor Q8 are respectively electrically connected to one end of capacitor C14.Pin 6 of voltage comparator U4B is electrically connected to one end of diode D7. The other end of diode D7 is electrically connected to one end of resistor R35. The other end of resistor R35 is electrically connected to resistor R35-1. Pin 10 of voltage comparator U4C is electrically connected to one end of diode D12. The other end of diode D12 is electrically connected to one end of resistor R39. Pin 13 of voltage comparator U4D is electrically connected to one end of resistor R41. The other ends of resistor R28-2, diode D6, diode D8, and diode D11 are respectively electrically connected to pin D of transistor Q1. 35-1. The other ends of diodes D9 and D10 are electrically connected to pin D of transistor Q3, respectively. The other ends of resistor R39 and capacitor D12 are electrically connected to pin D of transistor Q5, respectively. The other end of resistor R41 is electrically connected to pin D of transistor Q7. Pins S of transistors Q1, Q3, Q5, and Q7 are electrically connected to resistor R95 and diode W1, respectively. Diode W1 is electrically connected to diode W2. Pins S of transistors Q2 and Q4 are electrically connected to... Pin S of transistor Q6 and pin S of transistor Q8 are electrically connected to pins 1 and 2 of shunt regulator V4, respectively. Pin 2 of shunt regulator V4 is electrically connected to resistor R64. Pin D of transistor Q2 is electrically connected to one end of resistor R52. The other end of resistor R52 is electrically connected to resistor R53 and pin 2 of chip U6. The other end of resistor R53 is electrically connected to resistor R54, diode D29, and pin 1 of chip U6. Pin D of transistor Q4 is electrically connected to one end of resistor R55. The other end of resistor R55 is electrically connected to resistor R56 and pin 2 of chip U7. The other end is electrically connected to resistor R57, diode D30, and pin 1 of chip U7. Pin D of transistor Q6 is electrically connected to one end of resistor R58. The other end of resistor R58 is electrically connected to resistor R59 and pin 2 of chip U8. The other end of resistor R59 is electrically connected to resistor R60, diode D31, and pin 1 of chip U8. Pin D of transistor Q8 is electrically connected to one end of resistor R61. The other end of resistor R61 is electrically connected to resistor R62 and pin 2 of chip U9. The other end of resistor R62 is electrically connected to resistor R63, diode D32, and pin 1 of chip U9.

[0034] Pin 4 of the voltage comparator U4A is electrically connected to one end of capacitor C8, and pin 11 of the integrated operational amplifier U4A is electrically connected to one end of capacitor C9.

[0035] Pin 4 of the integrated operational amplifier U3A is electrically connected to one end of capacitor C1, and pin 11 of the integrated operational amplifier U3A is electrically connected to one end of capacitor C2.

[0036] The signal connector J1 and the power connector J2 are electrically connected to one end of the capacitor C3, the signal connector J3 and the power connector J4 are electrically connected to one end of the capacitor C4, the signal connector J5 and the power connector J6 are electrically connected to one end of the capacitor C5, and the signal connector J7 and the power connector J8 are electrically connected to one end of the capacitor C6.

[0037] The working principle of the high-power power supply temperature controller provided by this utility model is as follows:

[0038] Multi-channel high-precision temperature acquisition circuit: Employs four PT100 temperature sensors, deployed in key heat-generating areas of the power supply (including MOSFET power devices, high-frequency transformer, rectifier bridge module, and output filter capacitor bank). Each PT100 uses a TL431 to provide a reference voltage source. The PT100 uses a voltage divider resistor for voltage division. The resistance of the PT100 varies at different temperatures, thus converting temperature into a voltage signal.

[0039] High-speed operational amplifier comparator circuit: The LF247 voltage comparator window comparator circuit compares and performs calculations on four temperature signals in real time, selecting and outputting the signal with the highest temperature. Integrated hysteresis comparator function effectively prevents frequent fan start-stop at critical temperature points.

[0040] Intelligent graded fan control circuit: Based on the highest temperature detection value, it achieves three-level graded control: In low temperature conditions, one fan runs at low speed; in medium temperature conditions, two fans run at medium speed; in high temperature conditions, all fans are triggered to run at full speed and an alarm signal is output simultaneously. It adopts an optocoupler isolation and thyristor drive architecture: Electrical isolation between the control side and the high-voltage side is achieved through optocouplers (such as MOC3063), and the on / off state of the fan power supply is precisely controlled using thyristors (such as BTA16).

[0041] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-power power supply temperature controller, characterized in that, include: Multi-channel high-precision temperature acquisition circuit, high-speed operational amplifier comparison and operation circuit, and intelligent graded fan control circuit; The intelligent graded fan control circuit is electrically connected to the multi-channel high-precision temperature acquisition circuit and the high-speed operational amplifier comparison and operation circuit. The multi-channel high-precision temperature acquisition circuit includes four PT100 temperature sensors, which are deployed in the key heat-generating areas of the power supply.

2. The high-power power supply temperature controller according to claim 1, characterized in that: The PT100 temperature sensor is a thermistor. Thermistor 1 is electrically connected to signal connector J1 and power connector J2; thermistor 2 is electrically connected to signal connector J3 and power connector J4; thermistor 3 is electrically connected to signal connector J5 and power connector J6; and thermistor 4 is electrically connected to signal connector J7 and power connector J8. Signal connector J1 is electrically connected to pin 3 of integrated operational amplifier U3A and one end of resistor R3. Pin 1 of integrated operational amplifier U3A is electrically connected to diode D1 and one end of resistor R2. The other end of resistor R2 is electrically connected to one end of diode D25. Pin 2 of integrated operational amplifier U3A is electrically connected to one end of resistor R1. Signal connector J3 is electrically connected to pin 5 of integrated operational amplifier U3B and one end of resistor R6. Pin 7 of integrated operational amplifier U3B is electrically connected to diode D2 and one end of resistor R5. The other end of resistor R5 is electrically connected to one end of diode D26. Pin 6 of the integrated operational amplifier U3B is electrically connected to one end of resistor R4. Signal connector J5 is electrically connected to pin 10 of integrated operational amplifier U3C and one end of resistor R9. Pin 8 of integrated operational amplifier U3C is electrically connected to one end of diode D3 and resistor R8. The other end of resistor R8 is electrically connected to one end of diode D27. Pin 9 of integrated operational amplifier U3C is electrically connected to one end of resistor R7. Signal connector J7 is electrically connected to pin 12 of integrated operational amplifier U3D and one end of resistor R12. Pin 14 of integrated operational amplifier U3D is electrically connected to one end of diode D4 and resistor R11. The other end of resistor R11 is electrically connected to one end of diode D28. Pin 13 of integrated operational amplifier U3D is electrically connected to one end of resistor R10.

3. The high-power power supply temperature controller according to claim 2, characterized in that: The intelligent graded fan control circuit includes a chip IC12. Pin 3 of the chip IC12 is electrically connected to the positive terminal J11, pin 4 of the chip IC12 is electrically connected to the negative terminal J10, pin 1 of the chip IC12 is electrically connected to resistors R87 and R86, resistor R86 is electrically connected to resistor R34, diode D33, and pin 3 of transistor Q9, diode D33 is electrically connected to one end of resistor R88, pins 1 and 2 of transistor Q9 are electrically connected to one end of resistor R85, pin 1 of transistor Q9 is electrically connected to one end of resistor R84, and the other end of resistor R84... The pin 1 of the shunt regulator V3 is electrically connected. The pin 2 of the shunt regulator V3 is electrically connected to one end of capacitor C24, resistor R82, and resistor R83, and the other end of resistor R34. The other end of resistor R82 is electrically connected to one end of capacitor C23 and pin 1 of adjustable resistor P3. Pins 2 and 3 of adjustable resistor P3 are electrically connected to one end of resistor R15. The other ends of resistor R1, diode D1, resistor R4, diode D2, resistor R7, diode D3, resistor R10, and diode D4 are electrically connected to the other end of resistor R15.

4. The high-power power supply temperature controller according to claim 3, characterized in that: The intelligent graded fan control circuit includes a chip U5. Pin 1 of chip U5 is electrically connected to one end of resistors R89 and R91. The other end of resistor R89 ​​is electrically connected to pin 3 of diode D34 and transistor Q10. The other end of diode D34 is electrically connected to one end of resistor R90. Pins 1 and 2 of transistor Q10 are electrically connected to one end of resistor R81. Pin 1 of transistor Q10 is electrically connected to one end of resistor R79. The other end of resistor R79 is electrically connected to pin 1 of shunt regulator V1. Pin 3 of transistor Q10 is electrically connected to one end of resistor R80-1. One end of resistor R80-1 is electrically connected to one end of resistor R80. The other end of resistor R80 is electrically connected to pin 2 of shunt regulator V1. Pin 2 of shunt regulator V1 is electrically connected to one end of capacitor C26, resistor R78, and resistor R77. The other end of resistor R78 is electrically connected to one end of resistor R78-2. The other end of resistor R77 is electrically connected to one end of capacitor C25 and pin 1 of adjustable resistor P2. Pins 2 and 3 of adjustable resistor P2 are electrically connected to one end of resistor R14. The other end of resistor R14 is electrically connected to the other end of resistor R15.

5. The high-power power supply temperature controller according to claim 4, characterized in that: Pin 4 of chip U5 is electrically connected to resistor R93 and bidirectional thyristor ZK1. Pin 5 of chip U5 is electrically connected to resistor R92. Resistor R93 and bidirectional thyristor ZK1 are electrically connected to fan connectors J15, J31, and J32, respectively. Resistor R92 and bidirectional thyristor ZK1 are electrically connected to one end of capacitor C22. The other end of capacitor C22 is electrically connected to one end of resistor R94. The other end of resistor R94 is electrically connected to fan connectors J15, J31, and J32, respectively.

6. The high-power power supply temperature controller according to claim 4, characterized in that: The high-speed operational amplifier comparison circuit includes voltage comparators U4A, U4B, U4C, and U4D. Pin 2 of voltage comparator U4A is electrically connected to one end of resistor R24. The other end of resistor R24 ​​is electrically connected to one end of resistors R20, R20-2, and R19. Resistor R20-2 is electrically connected to one end of resistor R20-1. Pin 6 of voltage comparator U4B is electrically connected to one end of resistor R25. Resistor R25 is electrically connected to resistors R21 and R2... One end of resistor R25 is electrically connected to the other end of resistor R20 and resistor R20-1. Pin 9 of voltage comparator U4C is electrically connected to one end of resistor R26. Resistor R26 is electrically connected to one end of resistor R22 and resistor R22-2. Resistor R26 is electrically connected to the other end of resistor R21 and resistor R21-2. Pin 13 of voltage comparator U4D is electrically connected to one end of resistor R27. Resistor R27 is electrically connected to resistor R23. One end of resistor R22-3 is connected to resistor R27, the other end of resistor R22-3 is connected to the other end of resistor R22-2, pin 3 of voltage comparator U4A, pin 5 of voltage comparator U4B, pin 10 of voltage comparator U4C, and pin 12 of voltage comparator U4D are respectively electrically connected to capacitor C10 and one end of resistor R13, and the other end of resistor R13 is connected to the other end of resistor R15. One end of the resistor R19 is electrically connected to pin 3 of the adjustable resistor P1. Pins 1 and 2 of the adjustable resistor P1 are electrically connected to resistor R17, resistor R16, capacitor C7, and pin 1 of the shunt regulator V1, respectively. Pins 1 and 2 of the adjustable resistor P1 are electrically connected to power connector J2, power connector J4, power connector J6, and power connector J8, respectively. Pin 2 of the shunt regulator V1 is electrically connected to one end of resistor R18 and the other end of resistor R17.

7. The high-power power supply temperature controller according to claim 6, characterized in that: Pin 2 of the voltage comparator U4A is electrically connected to one end of diode D5. The other end of diode D5 is electrically connected to one end of resistor R28. The other end of resistor R28 is electrically connected to one end of resistor R28-2. Pin 1 of the voltage comparator U4A is electrically connected to one end of resistor R29. The other end of resistor R29 is electrically connected to one end of resistors R30, R44, and R45. The other end of resistor R45 is electrically connected to one end of diode D13. The other ends of resistor R44 and diode D13, and the pin of transistor Q2 are... Pin G is electrically connected to one end of capacitor C11. The other end of resistor R30 is electrically connected to one end of resistor R31 and pin G of transistor Q1. Pin 7 of voltage comparator U4B is electrically connected to one end of resistor R32. The other end of resistor R32 is electrically connected to one end of resistors R33, R46, R47, and diode D6. The other end of resistor R33 is electrically connected to resistor R96 and pin G of transistor Q3. The other end of resistor R47 is electrically connected to one end of diode D14. The other end of resistor R46 and diode D14... One end of the transistor Q4 and pin G are electrically connected to one end of capacitor C12; pin 8 of the voltage comparator U4C is electrically connected to one end of resistor R36; the other end of resistor R36 is electrically connected to one end of resistors R37, R48, R49, diode D8, and diode D9; the other end of resistor R37 is electrically connected to resistor R38 and pin G of transistor Q5; the other end of resistor R49 is electrically connected to one end of diode D15; the other ends of resistor R48 and diode D15, and pin G of transistor Q6 are electrically connected to... One end of capacitor C13; pin 14 of voltage comparator U4D is electrically connected to one end of resistor R40; the other end of resistor R40 is electrically connected to one end of resistors R42, R50, R51, diodes D10, D11, and D12; the other end of resistor R42 is electrically connected to resistor R43 and pin G of transistor Q7; the other end of resistor R51 is electrically connected to one end of diode D16; the other ends of resistor R50 and diode D16, and pin G of transistor Q8 are respectively electrically connected to one end of capacitor C14.Pin 6 of voltage comparator U4B is electrically connected to one end of diode D7. The other end of diode D7 is electrically connected to one end of resistor R35. The other end of resistor R35 is electrically connected to resistor R35-1. Pin 10 of voltage comparator U4C is electrically connected to one end of diode D12. The other end of diode D12 is electrically connected to one end of resistor R39. Pin 13 of voltage comparator U4D is electrically connected to one end of resistor R41. The other ends of resistor R28-2, diode D6, diode D8, and diode D11 are respectively electrically connected to pin D of transistor Q1. 35-1. The other ends of diodes D9 and D10 are electrically connected to pin D of transistor Q3, respectively. The other ends of resistor R39 and capacitor D12 are electrically connected to pin D of transistor Q5, respectively. The other end of resistor R41 is electrically connected to pin D of transistor Q7. Pins S of transistors Q1, Q3, Q5, and Q7 are electrically connected to resistor R95 and diode W1, respectively. Diode W1 is electrically connected to diode W2. Pins S of transistors Q2 and Q4 are electrically connected to... Pin S of transistor Q6 and pin S of transistor Q8 are electrically connected to pins 1 and 2 of shunt regulator V4, respectively. Pin 2 of shunt regulator V4 is electrically connected to resistor R64. Pin D of transistor Q2 is electrically connected to one end of resistor R52. The other end of resistor R52 is electrically connected to resistor R53 and pin 2 of chip U6. The other end of resistor R53 is electrically connected to resistor R54, diode D29, and pin 1 of chip U6. Pin D of transistor Q4 is electrically connected to one end of resistor R55. The other end of resistor R55 is electrically connected to resistor R56 and pin 2 of chip U7. The other end is electrically connected to resistor R57, diode D30, and pin 1 of chip U7. Pin D of transistor Q6 is electrically connected to one end of resistor R58. The other end of resistor R58 is electrically connected to resistor R59 and pin 2 of chip U8. The other end of resistor R59 is electrically connected to resistor R60, diode D31, and pin 1 of chip U8. Pin D of transistor Q8 is electrically connected to one end of resistor R61. The other end of resistor R61 is electrically connected to resistor R62 and pin 2 of chip U9. The other end of resistor R62 is electrically connected to resistor R63, diode D32, and pin 1 of chip U9.

8. The high-power power supply temperature controller according to claim 6, characterized in that: Pin 4 of the voltage comparator U4A is electrically connected to one end of capacitor C8, and pin 11 of the integrated operational amplifier U4A is electrically connected to one end of capacitor C9.

9. The high-power power supply temperature controller according to claim 2, characterized in that: Pin 4 of the integrated operational amplifier U3A is electrically connected to one end of capacitor C1, and pin 11 of the integrated operational amplifier U3A is electrically connected to one end of capacitor C2.

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