CN210807098U - Power supply circuit of medium-voltage automatic transfer switch controller - Google Patents
Power supply circuit of medium-voltage automatic transfer switch controller Download PDFInfo
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- CN210807098U CN210807098U CN201922081151.5U CN201922081151U CN210807098U CN 210807098 U CN210807098 U CN 210807098U CN 201922081151 U CN201922081151 U CN 201922081151U CN 210807098 U CN210807098 U CN 210807098U
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Abstract
The utility model relates to a power supply circuit technical field, concretely relates to middling pressure automatic transfer switch controller's power supply circuit. The power circuit of the medium-voltage automatic transfer switch controller comprises: the input rectifying filter circuit, the output regulating circuit, the output rectifying filter circuit and the voltage stabilizing circuit; the input end of the output regulating circuit is connected with the output end of the input rectifying and filtering circuit, the output end of the output regulating circuit is connected with the input end of the output rectifying and filtering circuit, and the output end of the output rectifying and filtering circuit is connected with the voltage stabilizing circuit. The power supply circuit of the medium-voltage automatic transfer switch controller has the advantages that the power supply design is more compact, the constant-voltage output can be accurately controlled, the short-circuit protection function is realized, and the reliability of the power supply circuit is improved.
Description
Technical Field
The utility model relates to a power supply circuit technical field, concretely relates to middling pressure automatic transfer switch controller's power supply circuit.
Background
Along with the increasing of the scale of important loads, the electrical energy consumption is increased, and in order to improve the energy consumption, a user unit usually adopts a medium-voltage automatic transfer switching device to switch two power supplies so as to ensure the continuity and reliability of power supply. In a medium voltage power supply system, there may be any one of the four types of AC220V, AC110V, DC220V, and DC110V as auxiliary power sources on site.
The existing medium-voltage automatic transfer switch controller is only suitable for alternating current and has the problem of narrow input voltage range.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model provides a power supply circuit of a medium-voltage automatic transfer switch controller, which has more compact power supply design, can accurately control constant-voltage output and has short-circuit protection function, thereby improving the reliability of the power supply circuit,
according to the utility model provides a technical scheme, middling pressure automatic transfer switch controller's power supply circuit includes: the input rectifying filter circuit, the output regulating circuit, the output rectifying filter circuit and the voltage stabilizing circuit;
the input end of the output regulating circuit is connected with the output end of the input rectifying and filtering circuit, the output end of the output regulating circuit is connected with the input end of the output rectifying and filtering circuit, and the output end of the output rectifying and filtering circuit is connected with the voltage stabilizing circuit.
Further, the output regulating circuit comprises a power transformer T1, a power chip U1 and a clamping circuit;
the power transformer T1 comprises a primary winding A, an auxiliary winding C and a secondary winding B;
the output end of the power chip U1 is connected with one end of a primary winding A of the power transformer T1, and the other end of the primary winding A is the input end of the output regulating circuit; the two ends of the primary winding A are connected with a clamping circuit;
the voltage on the auxiliary winding C is divided by a fourth resistor R4 and a fifth resistor R5 and then fed back to the feedback end of the power transformer T1,
the secondary winding B is the output end of the output regulating circuit.
Further, the clamping circuit comprises a first resistor R1, a third resistor R3, a second capacitor C2 and a fifth diode D5;
an anode of the fifth diode D5 is connected to one end of the primary winding a, a cathode of the fifth diode D5 is connected to one end of the third resistor R3, the other end of the third resistor R3 is connected to one end of the first resistor R1 and one end of the second capacitor C2, and the other end of the first resistor R1 and the other end of the second capacitor C2 are connected to the other end of the primary winding a.
Further, the input rectifying and filtering circuit comprises a full-wave rectifying circuit and a pi filtering circuit;
the full-wave rectification circuit comprises a second diode D2, a third diode D3, a sixth diode D6 and a seventh diode D7; the pi filter circuit comprises a common mode choke coil L2, a third capacitor C3 and a fourth capacitor C4;
the anode of the second diode D2 is connected to the cathode of a sixth diode D6, the cathode of the sixth diode D6 is connected to the cathode of the third capacitor C3, and the cathode of the second diode D2 is connected to the anode of the third capacitor C3; an anode of the third diode D3 is connected to a cathode of the seventh diode D7, an anode of the seventh diode D7 is connected to a cathode of the third capacitor C3, a cathode of the third diode D3 is connected to an anode of the third capacitor C3, an anode of the third capacitor C3 is connected to one end of the first coil L21 in the common mode choke L2, a cathode of the third capacitor C3 is connected to one end of the second coil L22 in the common mode choke L2, an anode of the fourth capacitor C4 is connected to the other end of the first coil L21 in the common mode choke L2, and a cathode of the fourth capacitor C4 is connected to one end of the second coil L22 in the common mode choke L2.
Further, the output rectifying and filtering circuit comprises a first diode D1, a first inductor L1, a first capacitor C1 and a second resistor R2;
the anode of the first diode D1 is the input end of the output rectifying and filtering circuit, the cathode of the first diode D1 is connected to one end of the first inductor L1, the other end of the first inductor L1 is connected to the anode of the first capacitor C1 and one end of the second resistor R2, and the cathode of the first capacitor C1 and the other end of the second resistor R2 are grounded; the positive electrode of the first capacitor C1 is the output end of the output rectifying and filtering circuit.
Further, the voltage stabilizing circuit comprises a voltage stabilizing chip U2, a fourth diode D4, a fifth capacitor C5 and a sixth capacitor C6;
the input end of the voltage stabilizing chip U2 is the input end of the voltage stabilizing circuit, the cathode of the fourth diode D4 is connected to the input end of the voltage stabilizing chip U2, the output end of the voltage stabilizing chip U2 is connected to the anode of the fifth capacitor C5 and one end of the sixth capacitor C6, and the other end of the sixth capacitor C6 and the cathode of the fifth capacitor C5 are grounded.
Further, the auxiliary power supply is connected to the input terminal of the input rectifying and filtering circuit through a fuse F1 and a voltage dependent resistor VR 1.
From the foregoing, the utility model provides a middling pressure automatic transfer switch controller's power supply circuit compares with prior art and possesses following advantage: the power supply circuit of the medium-voltage automatic transfer switch controller is suitable for alternating current and direct current, the input voltage range is wide, and the power supply circuit can work normally at 90-265V. And the peripheral circuit is simple, the power supply design is more compact, the constant voltage output can be accurately controlled, and the short-circuit protection function is realized, so that the reliability of the power supply circuit is improved.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the present invention.
100. The input rectification filter circuit 110, the full-wave rectification circuit, the 120 pi filter circuit, the 200 output regulation circuit, the 210 clamp circuit, the 300 output rectification filter circuit and the 400 voltage stabilizing circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The terms "inner" and "outer" are used to refer to directions toward and away from, respectively, the geometric center of a particular component.
The utility model provides a middling pressure automatic transfer switch controller's power supply circuit, as shown in FIG. 1, middling pressure automatic transfer switch controller's power supply circuit includes: an input rectifying and filtering circuit 100, an output regulating circuit 200, an output rectifying and filtering circuit 300 and a voltage stabilizing circuit 400;
the input end of the output regulating circuit 200 is connected to the output end of the input rectifying and filtering circuit 100, the output end of the output regulating circuit 200 is connected to the input end of the output rectifying and filtering circuit 300, and the output end of the output rectifying and filtering circuit 300 is connected to the voltage stabilizing circuit 400.
The power supply circuit of the medium-voltage automatic transfer switch controller is suitable for alternating current and direct current, the input voltage range is wide, and the power supply circuit can work normally at 90-265V. And the peripheral circuit is simple, the power supply design is more compact, the constant voltage output can be accurately controlled, and the short-circuit protection function is realized, so that the reliability of the power supply circuit is improved.
The output regulating circuit 200 comprises a power transformer T1, a power chip U1 and a clamping circuit 210;
the power transformer T1 comprises a primary winding A, an auxiliary winding C and a secondary winding B;
the output end of the power chip U1 is connected to one end of a primary winding A of the power transformer T1, and the other end of the primary winding A is the input end of the output regulating circuit 200; the two ends of the primary winding A are connected with a clamping circuit 210;
the voltage on the auxiliary winding C is divided by a fourth resistor R4 and a fifth resistor R5 and then fed back to the feedback end of the power transformer T1,
the secondary winding B is an output terminal of the output regulating circuit 200.
The model of the power chip U1 is preferably LNK626, voltage on the auxiliary winding C passes through, the fourth resistor R4 and the fifth resistor R5 are fed back to a feedback end FB of the power transformer T1 after voltage division, the power chip U1 controls the on-off of an MOSFET inside the power chip U1 according to sampling voltage on the feedback end FB, and the output voltage of the secondary winding B is adjusted to be V12 by controlling the resistance ratio of the fourth resistor R4 and the fifth resistor R5, and the fourth resistor R4 and the fifth resistor R5 are high-precision resistors. One end of the seventh capacitor C7 is connected to the pin BP of the power chip U1, and is used for supplying the operating power to the power chip U1 and decoupling the power chip. The RCD clamp circuit 210 is composed of a first resistor R1, a third resistor R3, a second capacitor C2 and a fifth diode D5, and is used for absorbing spike voltage generated at the turn-on moment of the MOSFET inside the power chip U1.
The input rectifying and filtering circuit 100 includes a full-wave rectifying circuit 110 and a pi-filter circuit 120;
the full-wave rectification circuit 110 includes a second diode D2, a third diode D3, a sixth diode D6, and a seventh diode D7; the pi filter circuit 120 comprises a common mode choke coil L2, a third capacitor C3 and a fourth capacitor C4;
the anode of the second diode D2 is connected to the cathode of a sixth diode D6, the cathode of the sixth diode D6 is connected to the cathode of the third capacitor C3, and the cathode of the second diode D2 is connected to the anode of the third capacitor C3; an anode of the third diode D3 is connected to a cathode of the seventh diode D7, an anode of the seventh diode D7 is connected to a cathode of the third capacitor C3, a cathode of the third diode D3 is connected to an anode of the third capacitor C3, an anode of the third capacitor C3 is connected to one end of the first coil L21 in the common mode choke L2, a cathode of the third capacitor C3 is connected to one end of the second coil L22 in the common mode choke L2, an anode of the fourth capacitor C4 is connected to the other end of the first coil L21 in the common mode choke L2, and a cathode of the fourth capacitor C4 is connected to one end of the second coil L22 in the common mode choke L2.
The common mode choke coil L2, the third capacitor C3 and the fourth capacitor C4 form a pi-shaped filter circuit, the common mode choke coil L2 can effectively suppress common mode conducted noise, and the third capacitor C3, the fourth capacitor C4, the third capacitor C3 and the fourth capacitor C4 are connected in parallel at two ends of the common mode choke coil L2.
The output rectifying and filtering circuit 300 comprises a first diode D1, a first inductor L1, a first capacitor C1 and a second resistor R2;
the anode of the first diode D1 is the input end of the output rectifying and filtering circuit 300, the cathode of the first diode D1 is connected to one end of the first inductor L1, the other end of the first inductor L1 is connected to the anode of the first capacitor C1 and one end of the second resistor R2, and the cathode of the first capacitor C1 and the other end of the second resistor R2 are grounded; the positive electrode of the first capacitor C1 is the output end of the output rectifying and filtering circuit 300.
The first diode D1 is used for rectifying V12 of the output voltage of the secondary winding B, the rectified power supply passes through an LC filter circuit composed of a first inductor L1 and a first capacitor C1, so that ripples of the switching power supply can be eliminated, an ideal dc voltage of +12V is output, the second resistor R2 serves as a dummy load, and the output voltages can be maintained within respective limits when no load exists.
The voltage stabilizing circuit 400 comprises a voltage stabilizing chip U2, a fourth diode D4, a fifth capacitor C5 and a sixth capacitor C6;
the input end of the voltage stabilizing chip U2 is the input end of the voltage stabilizing circuit 400, the cathode of the fourth diode D4 is connected to the input end of the voltage stabilizing chip U2, the output end of the voltage stabilizing chip U2 is connected to the anode of the fifth capacitor C5 and one end of the sixth capacitor C6, and the other end of the sixth capacitor C6 and the cathode of the fifth capacitor C5 are grounded.
The model of the voltage stabilizing chip U2 is preferably L7805ABV, the voltage stabilizing chip U2 stabilizes the voltage of the output +5V, and the fourth diode D4 is connected in parallel with the input end and the output end of the voltage stabilizing chip U2, so that the voltages at the two ends are basically equal, and the voltage stabilizing chip U2, the fifth capacitor C5 and the sixth capacitor C6 are protected to filter, and then high-quality power is provided for a microprocessor and other circuits.
Those of ordinary skill in the art will understand that: the above description is only for the specific embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A power supply circuit of a medium voltage automatic transfer switch controller, the power supply circuit of the medium voltage automatic transfer switch controller comprising: the input rectifying and filtering circuit comprises an input rectifying and filtering circuit (100), an output regulating circuit (200), an output rectifying and filtering circuit (300) and a voltage stabilizing circuit (400);
the input end of the output regulating circuit (200) is connected with the output end of the input rectifying and filtering circuit (100), the output end of the output regulating circuit (200) is connected with the input end of the output rectifying and filtering circuit (300), and the output end of the output rectifying and filtering circuit (300) is connected with the voltage stabilizing circuit (400).
2. The power supply circuit of the medium voltage automatic transfer switch controller of claim 1, wherein the output regulation circuit (200) comprises a power transformer T1, a power chip U1, and a clamp circuit (210);
the power transformer T1 comprises a primary winding A, an auxiliary winding C and a secondary winding B;
the output end of the power chip U1 is connected with one end of a primary winding A of the power transformer T1, and the other end of the primary winding A is the input end of the output regulating circuit (200); the two ends of the primary winding A are connected with a clamping circuit (210);
the voltage on the auxiliary winding C is divided by a fourth resistor R4 and a fifth resistor R5 and then fed back to the feedback end of the power transformer T1,
the secondary winding B is an output terminal of the output regulation circuit (200).
3. The power supply circuit of the medium voltage automatic transfer switch controller of claim 2, wherein the clamp circuit (210) comprises a first resistor R1, a third resistor R3, a second capacitor C2, and a fifth diode D5;
an anode of the fifth diode D5 is connected to one end of the primary winding a, a cathode of the fifth diode D5 is connected to one end of the third resistor R3, the other end of the third resistor R3 is connected to one end of the first resistor R1 and one end of the second capacitor C2, and the other end of the first resistor R1 and the other end of the second capacitor C2 are connected to the other end of the primary winding a.
4. The power supply circuit of the medium voltage automatic transfer switch controller of claim 1, wherein the input rectifying filter circuit (100) comprises a full wave rectifying circuit (110) and a pi filter circuit (120);
the full-wave rectification circuit (110) includes a second diode D2, a third diode D3, a sixth diode D6, and a seventh diode D7; the pi filter circuit (120) comprises a common mode choke coil L2, a third capacitor C3 and a fourth capacitor C4;
the anode of the second diode D2 is connected to the cathode of a sixth diode D6, the cathode of the sixth diode D6 is connected to the cathode of the third capacitor C3, and the cathode of the second diode D2 is connected to the anode of the third capacitor C3; an anode of the third diode D3 is connected to a cathode of the seventh diode D7, an anode of the seventh diode D7 is connected to a cathode of the third capacitor C3, a cathode of the third diode D3 is connected to an anode of the third capacitor C3, an anode of the third capacitor C3 is connected to one end of the first coil L21 in the common mode choke L2, a cathode of the third capacitor C3 is connected to one end of the second coil L22 in the common mode choke L2, an anode of the fourth capacitor C4 is connected to the other end of the first coil L21 in the common mode choke L2, and a cathode of the fourth capacitor C4 is connected to one end of the second coil L22 in the common mode choke L2.
5. The power supply circuit of the medium voltage automatic transfer switch controller of claim 1, wherein the output rectifying filter circuit (300) comprises a first diode D1, a first inductor L1, a first capacitor C1, and a second resistor R2;
the anode of the first diode D1 is the input end of the output rectifying and filtering circuit (300), the cathode of the first diode D1 is connected with one end of the first inductor L1, the other end of the first inductor L1 is connected with the anode of the first capacitor C1 and one end of the second resistor R2, and the cathode of the first capacitor C1 and the other end of the second resistor R2 are grounded; the positive electrode of the first capacitor C1 is the output end of the output rectifying and filtering circuit (300).
6. The power circuit of the medium voltage automatic transfer switch controller of claim 1, wherein the voltage stabilizing circuit (400) comprises a voltage stabilizing chip U2, a fourth diode D4, a fifth capacitor C5 and a sixth capacitor C6;
the input end of the voltage stabilizing chip U2 is the input end of the voltage stabilizing circuit (400), the cathode of the fourth diode D4 is connected with the input end of the voltage stabilizing chip U2, the output end of the voltage stabilizing chip U2 is connected with the anode of a fifth capacitor C5 and one end of a sixth capacitor C6, and the other end of the sixth capacitor C6 and the cathode of the fifth capacitor C5 are grounded.
7. The power supply circuit of the medium voltage automatic transfer switch controller of claim 1, wherein the auxiliary power supply is connected to the input of the input rectifying filter circuit (100) through a fuse F1 and a varistor VR 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922081151.5U CN210807098U (en) | 2019-11-27 | 2019-11-27 | Power supply circuit of medium-voltage automatic transfer switch controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922081151.5U CN210807098U (en) | 2019-11-27 | 2019-11-27 | Power supply circuit of medium-voltage automatic transfer switch controller |
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| Publication Number | Publication Date |
|---|---|
| CN210807098U true CN210807098U (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922081151.5U Active CN210807098U (en) | 2019-11-27 | 2019-11-27 | Power supply circuit of medium-voltage automatic transfer switch controller |
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| CN (1) | CN210807098U (en) |
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- 2019-11-27 CN CN201922081151.5U patent/CN210807098U/en active Active
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