Intelligent controllable energy-saving power supply circuit

Abstract

This utility model belongs to the field of power supply circuit technology, specifically providing an intelligent controllable energy-saving power supply circuit, including: an AC / DC conversion module, a voltage divider module, a first line switch module, a first control switch module, and a voltage protection module; the AC / DC conversion module is used to connect to single-phase AC power; when the connected single-phase AC power is within a preset voltage range, the first line switch module normally outputs DC power; when the connected single-phase AC power exceeds the maximum threshold voltage in the preset voltage range, the voltage protection module outputs a high level under the action of the second voltage divider voltage output from the second voltage divider terminal of the voltage divider module, and the first control switch module pulls down the voltage at the control terminal of the first line switch module under the action of this high level, so that the input and output terminals of the first line switch module are cut off, and the first line switch module stops outputting DC power, thereby realizing circuit self-protection when the input voltage (single-phase AC power) is too high.

Description

Technical Field

[0001] This utility model relates to the field of power supply circuit technology, and in particular to an intelligent and controllable energy-saving power supply circuit. Background Technology

[0002] Currently, electronic products are widely used in all aspects of life, meeting various needs and becoming an indispensable part of daily life. However, while bringing convenience, electronic products also bring many problems. For example, electronic products are a common cause of fires. The power supply section has the highest failure rate among electronic products. Unstable voltage or external accidents (such as incorrect wiring, natural disasters, or floods causing tangled wiring) can lead to excessively high voltage, causing electronic products to burn out and easily triggering fires with incalculable losses.

[0003] Therefore, a power control technology solution is needed that can enable circuit self-protection when the input voltage is too high. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an intelligent and controllable energy-saving power supply circuit.

[0005] This utility model provides an intelligent controllable energy-saving power supply circuit, comprising: an AC / DC conversion module, a voltage divider module, a first line switch module, a first control switch module, and a voltage protection module;

[0006] The AC input first terminal and the second terminal of the AC-DC conversion module are used to connect to single-phase AC power. Its AC input second terminal is electrically connected to the input terminal of the voltage divider module, and its DC output terminal is electrically connected to the input terminal of the first line switch module.

[0007] The first voltage divider terminal of the voltage divider module is electrically connected to the control terminal of the first line switch module and the input terminal of the first control switch module, respectively, and its second voltage divider terminal is electrically connected to the input terminal of the voltage protection module.

[0008] The output terminal of the first line switch module is used to output DC power;

[0009] The control terminal of the first control switch module is electrically connected to the output terminal of the voltage protection module, and its output terminal is electrically grounded.

[0010] When the single-phase AC power is connected, the first and second voltage divider terminals of the voltage divider module output a first voltage divider voltage and a second voltage divider voltage, respectively. If the single-phase AC power is within a preset voltage range, the voltage protection module outputs a low level under the action of the second voltage divider voltage, the input and output terminals of the first control switch module are cut off, and the input and output terminals of the first line switch module are connected. If the single-phase AC power exceeds the maximum threshold voltage within the preset voltage range, the voltage protection module outputs a high level under the action of the second voltage divider voltage, the input and output terminals of the first control switch module are connected, and the input and output terminals of the first line switch module are cut off.

[0011] In one possible implementation, the AC / DC conversion module includes a first resistor, a fuse, a first capacitor, a second capacitor, and a bridge rectifier;

[0012] The first end of the first resistor is electrically connected to the first end of the fuse as the first AC input terminal of the AC-DC conversion module, and its second end is electrically connected to the first end of the first capacitor as the second AC input terminal of the AC-DC conversion module.

[0013] The second end of the fuse is electrically connected to the first end of the second capacitor and the first AC input terminal of the bridge rectifier, respectively.

[0014] The second terminal of the first capacitor is electrically connected to the second terminal of the second capacitor and the second AC input terminal of the bridge rectifier, respectively.

[0015] The positive output terminal of the bridge rectifier serves as the DC output terminal of the AC / DC conversion module, while its negative output terminal is electrically grounded.

[0016] In one possible implementation, the voltage divider module includes a first diode, a second resistor, a third resistor, an adjustable resistor, a first Zener diode, and a fourth resistor;

[0017] The positive terminal of the first diode serves as the input terminal of the voltage divider module, and its negative terminal is electrically connected to the first terminals of the second resistor and the third resistor, respectively.

[0018] The second end of the second resistor is electrically connected to the negative terminal of the first Zener diode and the first end of the fourth resistor, respectively.

[0019] The second end of the third resistor is electrically connected to the first end of the adjustable resistor;

[0020] The adjustable terminal of the adjustable resistor serves as the second voltage divider terminal of the voltage divider module, and its second terminal is electrically grounded.

[0021] The positive terminal of the first Zener diode is electrically grounded;

[0022] The second end of the fourth resistor serves as the first voltage divider terminal of the voltage divider module.

[0023] In one possible implementation, the voltage divider module further includes a third capacitor;

[0024] The positive terminal of the third capacitor is electrically connected to the line where the second end of the second resistor is located, and its negative terminal is electrically connected to ground.

[0025] In one possible implementation, the voltage protection module includes a voltage reference chip and a fifth resistor;

[0026] The input terminal of the voltage reference chip is electrically connected to the first terminal of the fifth resistor as the input terminal of the voltage protection module, and its output terminal is electrically connected to the second terminal of the fifth resistor as the output terminal of the voltage protection module. Its ground terminal is electrically grounded.

[0027] In one possible implementation, the voltage protection module further includes a fourth capacitor and a fifth capacitor;

[0028] The positive terminal of the fourth capacitor is electrically connected to the line where the input terminal of the voltage reference chip is located, and its negative terminal is electrically connected to ground.

[0029] The positive terminal of the fifth capacitor is electrically connected to the line where the output terminal of the voltage reference chip is located, and its negative terminal is electrically connected to ground.

[0030] In one possible implementation, it also includes a relay, a second circuit switch module, a second control switch module, a third circuit switch module, a third control switch module, and a voltage regulator module;

[0031] The voltage divider module also includes a sixth resistor and a seventh resistor;

[0032] The first end of the relay coil is electrically connected to the output end of the first line switch module and the input end of the second line switch module, respectively, and the second end of its coil is electrically connected to the input end of the third line switch module. Its switching end is used to control the on / off state of the load line.

[0033] The control terminal of the second circuit switch module is electrically connected to the input terminal of the second control switch module, the first control terminal of the third control switch module, and the first terminal of the sixth resistor, respectively. Its output terminal is electrically connected to the output terminal of the third circuit switch module, the second control terminal of the third control switch module, and the voltage regulator terminal of the voltage regulator module as a voltage regulator output terminal.

[0034] The control terminal of the second control switch module is used to receive external control signals, and its output terminal is electrically grounded.

[0035] The control terminal of the third line switch module is electrically connected to the input terminal of the third control switch module and the first terminal of the seventh resistor, respectively.

[0036] The output terminal of the third control switch module is electrically grounded;

[0037] The second terminals of the sixth resistor and the seventh resistor are respectively electrically connected to the circuit where the negative terminal of the first Zener diode is located;

[0038] Specifically, when the connected single-phase AC power is within a preset voltage range: if the external control signal is low, the input and output terminals of the second control switch module are cut off, the input and output terminals of the second line switch module are connected, the input and output terminals of the third control switch module are connected, and the input and output terminals of the third line switch module are cut off; if the external control signal is high, the input and output terminals of the second control switch module are connected, the input and output terminals of the second line switch module are cut off, the input and output terminals of the third control switch module are cut off, and the input and output terminals of the third line switch module are connected.

[0039] In one possible implementation, an eighth resistor for current limiting is electrically connected between the first end of the relay coil and the output end of the third line switch module.

[0040] In one possible implementation, the third control switch module includes a switch unit, a second diode, a second Zener diode, a sixth capacitor, and a ninth resistor;

[0041] The input and output terminals of the switching unit serve as the input and output terminals of the third control switch module, respectively, and its control terminals are electrically connected to the negative terminal of the second Zener diode and the positive terminal of the sixth capacitor.

[0042] The negative terminal of the second diode serves as the first control terminal of the third control switch module, and its positive terminal is electrically connected to the positive terminal of the second Zener diode and the first terminal of the ninth resistor, respectively.

[0043] The negative terminal of the sixth capacitor is electrically connected to ground;

[0044] The second terminal of the ninth resistor serves as the second control terminal of the third control switch module.

[0045] In one possible implementation, the line where the output terminal of the first line switch module is located is electrically connected to a seventh capacitor for filtering.

[0046] The circuit containing the regulated output terminal is electrically connected to an eighth capacitor for filtering.

[0047] The technical solution provided by this utility model has at least the following beneficial effects:

[0048] By configuring a voltage divider module, a first line switch module, a first control switch module, and a voltage protection module, when the input single-phase AC power exceeds the maximum threshold voltage within the preset voltage range, the voltage protection module outputs a high level under the action of the second voltage divider voltage output from the second voltage divider terminal of the voltage divider module. Under the action of this high level, the first control switch module pulls down the voltage at the control terminal of the first line switch module, thereby cutting off the connection between the input and output terminals of the first line switch module and stopping the output of DC power. This achieves circuit self-protection when the input voltage (single-phase AC power) is too high, effectively improving the safety of the power supply circuit. Attached Figure Description

[0049] Figure 1 A circuit diagram of an intelligent controllable energy-saving power supply circuit provided for an embodiment of this utility model;

[0050] In the attached diagram, 10 is an AC / DC conversion module; 20 is a voltage divider module; 30 is a first line switch module; 31 is a first control switch module; 40 is a voltage protection module; 50 is a second line switch module; 51 is a second control switch module; 60 is a third line switch module; 61 is a third control switch module; 70 is a voltage regulator module; and 611 is a switching unit. Detailed Implementation

[0051] To enhance understanding of this utility model, it will be described in further detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain this utility model and do not limit the scope of protection of this utility model.

[0052] Please refer to Figure 1 The present invention provides an intelligent controllable energy-saving power supply circuit, comprising: an AC / DC conversion module 10, a voltage divider module 20, a first line switch module 30, a first control switch module 31, and a voltage protection module 40.

[0053] The AC input first terminal and the second terminal of the AC-DC conversion module 10 are used to connect to single-phase AC power. Its AC input second terminal is electrically connected to the input terminal of the voltage divider module 20, and its DC output terminal is electrically connected to the input terminal of the first line switch module 30.

[0054] The first voltage divider terminal of the voltage divider module 20 is electrically connected to the control terminal of the first line switch module 30 and the input terminal of the first control switch module 31, respectively, and its second voltage divider terminal is electrically connected to the input terminal of the voltage protection module 40.

[0055] The output terminal of the first line switch module 30 is used to output DC power;

[0056] The control terminal of the first control switch module 31 is electrically connected to the output terminal of the voltage protection module 40, and its output terminal is electrically grounded.

[0057] When the single-phase AC power is connected, the first and second voltage divider terminals of the voltage divider module 20 output a first voltage divider voltage and a second voltage divider voltage, respectively. If the single-phase AC power is within a preset voltage range, the voltage protection module 40 outputs a low level under the action of the second voltage divider voltage, the input and output terminals of the first control switch module 31 are cut off, and the input and output terminals of the first line switch module 30 are connected. If the single-phase AC power exceeds the maximum threshold voltage within the preset voltage range, the voltage protection module 40 outputs a high level under the action of the second voltage divider voltage, the input and output terminals of the first control switch module 31 are connected, and the input and output terminals of the first line switch module 30 are cut off.

[0058] In this embodiment, the AC / DC conversion module 10 is used to convert single-phase AC to DC, and can be implemented based on a conventional rectifier bridge. The voltage divider module 20 is used to sample the voltage of the single-phase AC, and can be implemented based on the principle of resistor voltage divider. The first line switch module 30 can be implemented based on a MOSFET. The first control switch module 31 can be implemented based on a transistor, for example, by a Q1 transistor and a R10 resistor. The Q1 transistor is a conventional NPN transistor. The R10 resistor is a conventional resistor and serves to limit current. The voltage protection module 40 can be implemented based on a conventional voltage reference chip. In this application, when the single-phase AC is too high, the intelligent controllable energy-saving power supply circuit can normally trigger the protection mechanism, effectively improving safety.

[0059] In one possible implementation, the AC / DC conversion module 10 includes a first resistor R1, a fuse F, a first capacitor C1, a second capacitor C2, and a bridge rectifier UR;

[0060] The first end of the first resistor R1 is electrically connected to the first end of the fuse F as the first AC input terminal of the AC-DC conversion module 10, and its second end is electrically connected to the first end of the first capacitor C1 as the second AC input terminal of the AC-DC conversion module 10.

[0061] The second end of the fuse F is electrically connected to the first end of the second capacitor C2 and the first AC input end of the bridge rectifier UR, respectively.

[0062] The second terminal of the first capacitor C1 is electrically connected to the second terminal of the second capacitor C2 and the second AC input terminal of the bridge rectifier UR, respectively;

[0063] The positive output terminal of the bridge rectifier UR serves as the DC output terminal of the AC / DC conversion module 10, while its negative output terminal is electrically grounded.

[0064] In this embodiment, the bridge rectifier UR can be a full-bridge rectifier bridge rectifier. The first resistor R1, the first capacitor C1, and the second capacitor C2 form an automatic discharge and high / low voltage conversion circuit. In specific implementation, the neutral and live wires of the externally input single-phase AC power are randomly connected to the first terminal of the first capacitor C1 and the first terminal of the fuse F, resulting in a voltage drop to another phase voltage at the center point of the first capacitor C1 and the second capacitor C2. For example, if the first terminal of the second capacitor C2 is the live wire input, then the center point of the first capacitor C1 and the second capacitor C2 is the neutral wire terminal; if the first terminal of the second capacitor C2 is the neutral wire input, then the center point of the first capacitor C1 and the second capacitor C2 is the live wire terminal. The function of the first resistor R1 is to discharge the residual AC current on the first capacitor C1 and the second capacitor C2 for a short time each time the power is cut off, improving safety. The first resistor R1 can be an 820K resistor. In a specific implementation, the first line switch module 30 is implemented based on an NMOS transistor and can be represented by M1. When M1 is turned on, the DC power output by the bridge rectifier UR is output from the source through the drain of M1.

[0065] In one possible implementation, the voltage divider module 20 includes a first diode D1, a second resistor R2, a third resistor R3, an adjustable resistor RE, a first Zener diode ZD1, and a fourth resistor R4.

[0066] The positive terminal of the first diode D1 serves as the input terminal of the voltage divider module 20, and its negative terminal is electrically connected to the first terminals of the second resistor R2 and the third resistor R3, respectively.

[0067] The second end of the second resistor R2 is electrically connected to the negative terminal of the first Zener diode ZD1 and the first end of the fourth resistor R4, respectively.

[0068] The second terminal of the third resistor R3 is electrically connected to the first terminal of the adjustable resistor RE;

[0069] The adjustable terminal of the adjustable resistor RE serves as the second voltage divider terminal of the voltage divider module 20, and its second terminal is electrically grounded.

[0070] The positive terminal of the first Zener diode ZD1 is electrically grounded;

[0071] The second end of the fourth resistor R4 serves as the first voltage divider terminal of the voltage divider module 20.

[0072] In this embodiment, the first diode D1 can be a conventional diode used to achieve rectification. The second resistor R2 serves as a voltage reducer, and the third resistor R3 and the adjustable resistor RE perform voltage division. The adjustable resistor RE can be adjusted according to the actual implementation needs to determine the output voltage of the adjustable terminal. In a specific implementation, the first line switch module 30 can be implemented using an NMOS transistor, denoted as M1. The first Zener diode ZD1 can be a conventional 30V Zener diode, and the first Zener diode ZD1 provides the turn-on voltage to M1 in the first line switch module 30 through the fourth resistor R4.

[0073] In one possible implementation, the voltage divider module 20 further includes a third capacitor C3;

[0074] The positive terminal of the third capacitor C3 is electrically connected to the line where the second end of the second resistor R2 is located, and its negative terminal is electrically connected to ground.

[0075] In this embodiment, the third capacitor C3 is used for filtering and can be a conventional electrolytic capacitor. The second resistor R2, the third capacitor C3, and the first Zener diode ZD1 together form a startup power supply.

[0076] In one possible implementation, the voltage protection module 40 includes a voltage reference chip IC and a fifth resistor R5;

[0077] The input terminal of the voltage reference chip IC is electrically connected to the first terminal of the fifth resistor R5 as the input terminal of the voltage protection module 40, and its output terminal is electrically connected to the second terminal of the fifth resistor R5 as the output terminal of the voltage protection module 40. Its ground terminal is electrically grounded.

[0078] In this embodiment, a conventional voltage reference chip IC is used, and the fifth resistor R5 is a pull-up resistor. Assuming the input voltage of the voltage reference chip IC is greater than 3V (e.g., 3.05V-5.5V), the voltage reference chip IC outputs a high level (e.g., 3V) at its output terminal. The maximum threshold voltage within the preset voltage range is 265V. In one specific implementation, when the single-phase AC voltage exceeds 265V, the adjustable terminal of the adjustable resistor RE (i.e., the second voltage divider terminal of the voltage divider module 20) outputs a voltage greater than 3V. The voltage reference chip IC outputs a high level, connecting the input and output terminals of the first control switch module 31. The voltage at the control terminal of the first line switch module 30 is pulled low, cutting off the connection between the input and output terminals of the first line switch module 30, thus completing the overvoltage protection function.

[0079] In one possible implementation, the voltage protection module 40 further includes a fourth capacitor C4 and a fifth capacitor C5;

[0080] The positive terminal of the fourth capacitor C4 is electrically connected to the line where the input terminal of the voltage reference chip IC is located, and its negative terminal is electrically connected to ground.

[0081] The positive terminal of the fifth capacitor C5 is electrically connected to the line where the output terminal of the voltage reference chip IC is located, and its negative terminal is electrically connected to ground.

[0082] In this embodiment, the fourth capacitor C4 and the fifth capacitor C5 serve a conventional filtering function, which can make the circuit operation more stable. Specifically, this can be achieved based on conventional electrolytic capacitors.

[0083] In one possible implementation, it also includes a relay J1, a second line switch module 50, a second control switch module 51, a third line switch module 60, a third control switch module 61, and a voltage regulator module 70;

[0084] The voltage divider module 20 also includes a sixth resistor R6 and a seventh resistor R7;

[0085] The first end of the coil of the relay J1 is electrically connected to the output end of the first line switch module 30 and the input end of the second line switch module 50, respectively, and the second end of its coil is electrically connected to the input end of the third line switch module 60. Its switching end is used to control the on / off state of the load line.

[0086] The control terminal of the second line switch module 50 is electrically connected to the input terminal of the second control switch module 51, the first control terminal of the third control switch module 61, and the first terminal of the sixth resistor R6, respectively. Its output terminal is electrically connected to the output terminal of the third line switch module 60, the second control terminal of the third control switch module 61, and the voltage regulator terminal of the voltage regulator module 70 as a voltage regulator output terminal.

[0087] The control terminal of the second control switch module 51 is used to receive external control signals, and its output terminal is electrically grounded.

[0088] The control terminal of the third line switch module 60 is electrically connected to the input terminal of the third control switch module 61 and the first terminal of the seventh resistor R7, respectively.

[0089] The output terminal of the third control switch module 61 is electrically grounded;

[0090] The second terminals of the sixth resistor R6 and the seventh resistor R7 are electrically connected to the circuit where the negative terminal of the first Zener diode ZD1 is located.

[0091] Specifically, when the connected single-phase AC power is within a preset voltage range: if the external control signal is low, the input and output terminals of the second control switch module 51 are cut off, the input and output terminals of the second line switch module 50 are connected, the input and output terminals of the third control switch module 61 are connected, and the input and output terminals of the third line switch module 60 are cut off; if the external control signal is high, the input and output terminals of the second control switch module 51 are connected, the input and output terminals of the second line switch module 50 are cut off, the input and output terminals of the third control switch module 61 are cut off, and the input and output terminals of the third line switch module 60 are connected.

[0092] In this embodiment, relay J1 can be a conventional DC relay with an operating voltage of 5V, used to control the power supply to other loads (such as lights) on and off. The voltage regulator module 70 can be implemented based on a Zener diode, providing a regulated 5V voltage. For example... Figure 1 The Zener diode in the voltage regulator module 70 can be represented by ZD3, and can be implemented by a single ZD3A or ZD3B Zener diode. For improved safety, both ZD3A and ZD3B Zener diodes can be used simultaneously. In specific implementations, both the ZD3A and ZD3B Zener diodes can be 5V Zener diodes.

[0093] The second line switch module 50 can be implemented based on an NMOS transistor (represented by M2) and a resistor R11. The first Zener diode ZD1 can be a conventional 30V Zener diode. The first Zener diode ZD1 provides the turn-on voltage to M2 in the second line switch module 50 through the sixth resistor R6. The resistor R11 is a small-value resistor. When M2 in the second line switch module 50 is turned on and M3 in the third line switch module 60 is turned off, it is equivalent to directly providing the DC power output from the first line switch module 30 to the regulated output terminal, which can realize the low-power standby function.

[0094] The second control switch module 51 can be implemented based on a transistor, for example, by using a Q2 transistor and a R12 resistor. The Q2 transistor is a conventional NPN transistor. The R12 resistor serves to limit current.

[0095] The third circuit switch module 60 can be implemented based on an NMOS transistor (represented by M3) and a diode D3. The first Zener diode ZD1 provides the turn-on voltage to M3 in the third circuit switch module 60 through the seventh resistor R7. The diode D3 can be understood as a voltage reverse current protection diode. The control terminal and the regulated output terminal of the second control switch module 51 can be connected to a smart chip S (e.g., a human body induction sensor). The smart chip S can be used to control the switch of relay J1 to realize the intelligent control of relay J1.

[0096] In one possible implementation, an eighth resistor R8 for current limiting is electrically connected between the first end of the coil of the relay J1 and the output end of the third line switch module 60.

[0097] In this embodiment, the eighth resistor R8 is a conventional resistor. In specific implementation, the resistance value of the eighth resistor R8 is greater than the coil resistance value of relay J1. When M3 is turned on, a large current flows through the coil of relay J1, M3, and diode D3, while a small current flows through the eighth resistor R8. The large and small currents converge at the regulated output terminal and are regulated by the voltage regulator module 70 to output a stable voltage (e.g., 5V).

[0098] In one possible implementation, the third control switch module 61 includes a switch unit 611, a second diode D2, a second Zener diode ZD2, a sixth capacitor C6, and a ninth resistor R9.

[0099] The input and output terminals of the switching unit 611 serve as the input and output terminals of the third control switch module 61, respectively, and its control terminals are electrically connected to the negative terminal of the second Zener diode ZD2 and the positive terminal of the sixth capacitor C6, respectively.

[0100] The negative terminal of the second diode D2 serves as the first control terminal of the third control switch module 61, and its positive terminal is electrically connected to the positive terminal of the second Zener diode ZD2 and the first terminal of the ninth resistor R9.

[0101] The negative terminal of the sixth capacitor C6 is electrically grounded;

[0102] The second terminal of the ninth resistor R9 serves as the second control terminal of the third control switch module 61.

[0103] In this embodiment, the third control switch module 61 is a delay circuit. The switch unit 611 can be implemented based on a transistor, for example, by a Q3 transistor and a resistor R13. The Q3 transistor is a conventional NPN transistor. The R13 resistor serves as a current limiter. In a specific implementation, such as... Figure 1Assuming the smart chip S is a human body sensor: When no one triggers the smart chip S, the output of the smart chip S is low, Q2 is off, M2 is on, Q3 is on, and M3 is off; when someone triggers the smart chip S, the output of the smart chip S is high, Q2 is on, M2 is off, the sixth capacitor C6 continues to supply power, Q3 is on, and M3 is off; after a period of time since the smart chip S was triggered, the output of the smart chip S is high, Q2 is on, M2 is off, the charge stored in the sixth capacitor C6 is insufficient to turn on Q3, Q3 is off, and M3 is on. By delaying the Q3, the delay of the M3 can be achieved, thereby achieving the delay control of the relay J1.

[0104] In one possible implementation, the line where the output terminal of the first line switch module 30 is located is electrically connected to a seventh capacitor C7 for filtering.

[0105] The circuit containing the regulated output terminal is electrically connected to an eighth capacitor C8 for filtering.

[0106] In this embodiment, both the seventh capacitor C7 and the eighth capacitor C8 can be implemented using conventional electrolytic capacitors.

[0107] It should be noted that the intelligent controllable energy-saving power supply circuit provided in this application has the following advantages in specific implementation: the power consumption can be controlled within the range of 0.2-0.5W in standby or working state; it can be matched with various intelligent chips or intelligent modules to form an integrated product; it can withstand long-term input of up to 560V AC power without being burned out; it can enter protection mode without being burned out when the single-phase AC power input is greater than 265V (or 275V) and the linear phase input is 380V.

[0108] The above embodiments should not limit the present invention in any way. All technical solutions obtained by equivalent substitution or equivalent conversion fall within the protection scope of the present invention.

Claims

1. An intelligent and controllable energy-saving power supply circuit, characterized in that, include: AC / DC conversion module, voltage divider module, first line switch module, first control switch module, voltage protection module; The AC input first terminal and the second terminal of the AC-DC conversion module are used to connect to single-phase AC power. Its AC input second terminal is electrically connected to the input terminal of the voltage divider module, and its DC output terminal is electrically connected to the input terminal of the first line switch module. The first voltage divider terminal of the voltage divider module is electrically connected to the control terminal of the first line switch module and the input terminal of the first control switch module, respectively, and its second voltage divider terminal is electrically connected to the input terminal of the voltage protection module. The output terminal of the first line switch module is used to output DC power; The control terminal of the first control switch module is electrically connected to the output terminal of the voltage protection module, and its output terminal is electrically grounded. When the single-phase AC power is connected, the first and second voltage divider terminals of the voltage divider module output a first voltage divider voltage and a second voltage divider voltage, respectively. If the single-phase AC power is within a preset voltage range, the voltage protection module outputs a low level under the action of the second voltage divider voltage, the input and output terminals of the first control switch module are cut off, and the input and output terminals of the first line switch module are connected. If the single-phase AC power exceeds the maximum threshold voltage within the preset voltage range, the voltage protection module outputs a high level under the action of the second voltage divider voltage, the input and output terminals of the first control switch module are connected, and the input and output terminals of the first line switch module are cut off.

2. The intelligent controllable energy-saving power supply circuit according to claim 1, characterized in that, The AC / DC conversion module includes a first resistor, a fuse, a first capacitor, a second capacitor, and a bridge rectifier; The first end of the first resistor is electrically connected to the first end of the fuse as the first AC input terminal of the AC-DC conversion module, and its second end is electrically connected to the first end of the first capacitor as the second AC input terminal of the AC-DC conversion module. The second end of the fuse is electrically connected to the first end of the second capacitor and the first AC input terminal of the bridge rectifier, respectively. The second terminal of the first capacitor is electrically connected to the second terminal of the second capacitor and the second AC input terminal of the bridge rectifier, respectively. The positive output terminal of the bridge rectifier serves as the DC output terminal of the AC / DC conversion module, while its negative output terminal is electrically grounded.

3. The intelligent controllable energy-saving power supply circuit according to claim 1, characterized in that, The voltage divider module includes a first diode, a second resistor, a third resistor, an adjustable resistor, a first Zener diode, and a fourth resistor; The positive terminal of the first diode serves as the input terminal of the voltage divider module, and its negative terminal is electrically connected to the first terminals of the second resistor and the third resistor, respectively. The second end of the second resistor is electrically connected to the negative terminal of the first Zener diode and the first end of the fourth resistor, respectively. The second end of the third resistor is electrically connected to the first end of the adjustable resistor; The adjustable terminal of the adjustable resistor serves as the second voltage divider terminal of the voltage divider module, and its second terminal is electrically grounded. The positive terminal of the first Zener diode is electrically grounded; The second end of the fourth resistor serves as the first voltage divider terminal of the voltage divider module.

4. The intelligent controllable energy-saving power supply circuit according to claim 3, characterized in that, The voltage divider module also includes a third capacitor; The positive terminal of the third capacitor is electrically connected to the line where the second end of the second resistor is located, and its negative terminal is electrically connected to ground.

5. The intelligent controllable energy-saving power supply circuit according to claim 3, characterized in that, The voltage protection module includes a voltage reference chip and a fifth resistor; The input terminal of the voltage reference chip is electrically connected to the first terminal of the fifth resistor as the input terminal of the voltage protection module, and its output terminal is electrically connected to the second terminal of the fifth resistor as the output terminal of the voltage protection module. Its ground terminal is electrically grounded.

6. The intelligent controllable energy-saving power supply circuit according to claim 5, characterized in that, The voltage protection module also includes a fourth capacitor and a fifth capacitor; The positive terminal of the fourth capacitor is electrically connected to the line where the input terminal of the voltage reference chip is located, and its negative terminal is electrically connected to ground. The positive terminal of the fifth capacitor is electrically connected to the line where the output terminal of the voltage reference chip is located, and its negative terminal is electrically connected to ground.

7. The intelligent controllable energy-saving power supply circuit according to claim 3, characterized in that, It also includes relays, a second circuit switch module, a second control switch module, a third circuit switch module, a third control switch module, and a voltage regulator module; The voltage divider module also includes a sixth resistor and a seventh resistor; The first end of the relay coil is electrically connected to the output end of the first line switch module and the input end of the second line switch module, respectively, and the second end of its coil is electrically connected to the input end of the third line switch module. Its switching end is used to control the on / off state of the load line. The control terminal of the second circuit switch module is electrically connected to the input terminal of the second control switch module, the first control terminal of the third control switch module, and the first terminal of the sixth resistor, respectively. Its output terminal is electrically connected to the output terminal of the third circuit switch module, the second control terminal of the third control switch module, and the voltage regulator terminal of the voltage regulator module as a voltage regulator output terminal. The control terminal of the second control switch module is used to receive external control signals, and its output terminal is electrically grounded. The control terminal of the third line switch module is electrically connected to the input terminal of the third control switch module and the first terminal of the seventh resistor, respectively. The output terminal of the third control switch module is electrically grounded; The second terminals of the sixth resistor and the seventh resistor are respectively electrically connected to the circuit where the negative terminal of the first Zener diode is located; Specifically, when the connected single-phase AC power is within a preset voltage range: if the external control signal is low, the input and output terminals of the second control switch module are cut off, the input and output terminals of the second line switch module are connected, the input and output terminals of the third control switch module are connected, and the input and output terminals of the third line switch module are cut off; if the external control signal is high, the input and output terminals of the second control switch module are connected, the input and output terminals of the second line switch module are cut off, the input and output terminals of the third control switch module are cut off, and the input and output terminals of the third line switch module are connected.

8. The intelligent controllable energy-saving power supply circuit according to claim 7, characterized in that, An eighth resistor for current limiting is electrically connected between the first end of the relay coil and the output end of the third line switch module.

9. The intelligent controllable energy-saving power supply circuit according to claim 7, characterized in that, The third control switch module includes a switch unit, a second diode, a second Zener diode, a sixth capacitor, and a ninth resistor; The input and output terminals of the switching unit serve as the input and output terminals of the third control switch module, respectively, and its control terminals are electrically connected to the negative terminal of the second Zener diode and the positive terminal of the sixth capacitor. The negative terminal of the second diode serves as the first control terminal of the third control switch module, and its positive terminal is electrically connected to the positive terminal of the second Zener diode and the first terminal of the ninth resistor, respectively. The negative terminal of the sixth capacitor is electrically connected to ground; The second terminal of the ninth resistor serves as the second control terminal of the third control switch module.

10. The intelligent controllable energy-saving power supply circuit according to claim 7, characterized in that, The output terminal of the first line switch module is electrically connected to a seventh capacitor for filtering. The circuit containing the regulated output terminal is electrically connected to an eighth capacitor for filtering.

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