CN212627722U - 24V direct current power supply circuit compatible with 220V alternating current or 24V direct current input - Google Patents
24V direct current power supply circuit compatible with 220V alternating current or 24V direct current input Download PDFInfo
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- CN212627722U CN212627722U CN202021602650.0U CN202021602650U CN212627722U CN 212627722 U CN212627722 U CN 212627722U CN 202021602650 U CN202021602650 U CN 202021602650U CN 212627722 U CN212627722 U CN 212627722U
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Abstract
The utility model relates to a compatible 220V exchanges or 24V direct current input's 24V direct current power supply circuit, including power supply selection circuit, alternating current-direct current converting circuit, 12V direct current voltage converting circuit and 5V direct current voltage converting circuit, outside alternating current 220V voltage or direct current 24V voltage are connected to power supply selection circuit's input, alternating current-direct current converting circuit's input is connected to power supply selection circuit's output, the first direct current 24V voltage of the same kind of power supply selection circuit output, alternating current-direct current converting circuit output second road direct current 24V voltage, the first direct current 24V voltage of the same kind and second road direct current 24V voltage all are connected to 12V direct current voltage converting circuit's input and 5V direct current voltage converting circuit input. The utility model discloses a set up the power supply selection circuit, no matter outside power supply is suitable for alternating current 220V and direct current 24V homoenergetic, and the commonality is strong, can satisfy the needs of different occasions.
Description
Technical Field
The utility model relates to a power technical field especially relates to a 24V DC power supply circuit of compatible 220V interchange or 24V DC input.
Background
The DC power supply has two electrodes, positive and negative, and the positive electrode has high potential and the negative electrode has low potential. A dc power supply is an energy conversion device that converts other forms of energy into electrical energy to supply a circuit to maintain a steady flow of current.
With the progress of science and technology, a direct current 24V power supply is used as a common direct current working voltage, and a stable direct current 24V power supply can be subjected to voltage reduction to obtain direct current voltages of 12V and 5V, so that the direct current 24V power supply has wide application in various industries. Most of the existing direct current 24V power supplies are obtained by converting an alternating current power supply or reducing the voltage of a direct current power supply, so that the direct current 24V power supplies are poor in applicability, the required direct current 24V or 12V or 5V voltage can be obtained only by working under the condition of specific voltage, and the existing direct current 24V power supply circuit has the defect that the output direct current voltage is unstable.
Disclosure of Invention
In view of this, an object of the present invention is to provide a 24V dc power circuit compatible with 220V ac or 24V dc input, which can be applied to ac 220V input and dc 24V input simultaneously, and has strong versatility and more stable output dc voltage.
In order to realize above purpose, the utility model discloses a such 24V DC power supply circuit of compatible 220V interchange or 24V DC input, including power supply selection circuit and alternating current-direct current converting circuit, outside interchange 220V voltage or direct current 24V voltage are connected to power supply selection circuit's input, alternating current-direct current converting circuit's input is connected to power supply selection circuit's output, the first direct current 24V voltage of the same kind of power supply selection circuit output, alternating current-direct current converting circuit output second way direct current 24V voltage.
The 24V direct current power supply circuit compatible with 220V alternating current or 24V direct current input is provided with the power supply selection circuit, and when external power supply is direct current 24V voltage, the power supply selection circuit directly outputs the first path of direct current 24V voltage; when the external power supply is alternating current 220V voltage, the output end of the power supply selection circuit is output to the input end of the alternating current-direct current conversion circuit, and therefore the second path of direct current 24V voltage is output. The utility model discloses compatible 220V exchanges or 24V direct current input's 24V direct current power supply circuit can satisfy the input of exchanging 220V and direct current 24V, direct current 24V's output, no matter outside power supply is suitable for exchanging 220V and direct current 24V homoenergetic, and the commonality is strong, can satisfy the needs of different occasions.
The utility model is further arranged that the power supply selection circuit comprises a common input interface P, a voltage dependent resistor RV1, a resistor R2, a resistor R4, a resistor R7, a capacitor C7, a diode D7, a TVS diode D7, a MOS transistor Q7 and a relay K7, wherein two ends of the voltage dependent resistor RV 7 are connected to two ends of the common input interface P, one end of the resistor R7 is connected to one end of the voltage dependent resistor RV 7, the other end of the resistor R7 is connected to one end of the capacitor C7 and the anode of the diode D7, the cathode of the diode D7 is connected to one end of the TVS diode D7 and the cathode of the diode D7, the anode of the diode D7 is connected to one end of the resistor R7, the other end of the capacitor R7, the one end of the capacitor C7, the gate of the MOS transistor Q7, the other end of the diode D, The other end of the resistor R7, the other end of the capacitor C9 and the source electrode of the MOS transistor Q2 are respectively connected with the other end of the piezoresistor RV1, the drain of the MOS transistor Q2 is connected with one end of the coil of the relay K1, the other end of the coil of the relay K1 is connected with one end of a resistor R21, a diode D13 is connected in parallel with two ends of the coil of the relay K1, the other end of a resistor R21 is connected with the cathode of a diode D2, a resistor R2 is connected in parallel with two ends of a resistor R21, the positive pole of diode D2 connects the one end of public input interface P respectively, the one end of public input interface P is all connected to the one end of relay K1's normally closed contact and the one end of relay K1's normally open contact, and the input of alternating current-direct current conversion circuit is connected respectively to the other end of relay K1's normally closed contact and the other end of public input interface P, and relay K1's normally open contact's the other end and the other end of public input interface P output direct current 24V voltage of the first way.
The working principle of the power supply selection circuit is as follows: when the common input interface P is connected with alternating current 220V voltage, the resistor R4 and the capacitor C2 form a resistance-capacitance voltage reduction circuit, the voltage after voltage reduction is not enough to drive the MOS transistor Q2 to be conducted, therefore, the alternating current voltage of 220V is connected to the alternating current-direct current conversion circuit through a normally closed loop of the relay K1, and the alternating current-direct current conversion circuit outputs a second direct current 24V voltage; when the common input interface P is connected with a direct current 24V voltage, the capacitor C2 is equivalent to an open circuit, the direct current 24V voltage is enough to drive the MOS tube Q2 to be conducted, the coil of the relay K1 is electrified to work, the relay K1 is switched to a very closed loop, and the direct current 24V voltage is directly output by the power supply selection circuit. The power supply selection circuit component is simple in structure, and the voltage output switching is quick and reliable.
The utility model discloses further be provided with 12V direct current voltage converting circuit and 5V direct current voltage converting circuit, 24V voltages of direct current and the 24V voltages of second way all the way all are connected to 12V direct current voltage converting circuit's input and 5V direct current voltage converting circuit input.
The 12V direct current voltage conversion circuit and the 5V direct current voltage conversion circuit obtain stable direct current 24V voltage from the first path of direct current 24V voltage or the second path of direct current 24V voltage, and further step down to obtain required 12V direct current voltage and 5V direct current voltage.
The utility model discloses further set up to alternating current-direct current converting circuit and include rectifier circuit, filter circuit and switching power supply control circuit, switching power supply control circuit adopts the model to realize the stable output of second way direct current 24V voltage for OB 2371's switching power supply chip.
The alternating current-direct current conversion circuit adopts the switching power supply chip to adjust the output voltage, can effectively simplify the circuit, enables the output second path direct current 24V voltage to be stable, and improves the reliability of the working of the utility model.
This practicality further sets up to MOS pipe Q2's model is withstand voltage 600V's N channel MOS pipe, relay K1's model is two way Z type normally closed relays.
Drawings
Fig. 1 is a schematic block diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a power supply selection circuit according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an ac-dc conversion circuit according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a 12V dc voltage conversion circuit according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a 5V dc voltage conversion circuit according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1-5, the utility model relates to a compatible 220V exchanges or 24V DC input's 24V DC power supply circuit, including power supply selection circuit, alternating current-direct current converting circuit, 12V DC voltage converting circuit and 5V DC voltage converting circuit, outside alternating current 220V voltage or direct current 24V voltage are connected to power supply selection circuit's input, alternating current-direct current converting circuit's input is connected to power supply selection circuit's output, the first direct current 24V voltage of the same kind of power supply selection circuit output, alternating current-direct current converting circuit output second way direct current 24V voltage, the first direct current 24V voltage of the same kind and second direct current 24V voltage all are connected to 12V DC voltage converting circuit's input and 5V DC voltage converting circuit input.
As shown in fig. 2 and 3, the power supply selection circuit includes a common input interface P, a voltage dependent resistor RV1, a resistor R2, a resistor R4, a resistor R7, a resistor R20, a resistor R21, a capacitor C2, a capacitor C9, a diode D2, a diode D3, a TVS diode D3, a MOS transistor Q3, and a relay K3, where the MOS transistor Q3 is an N-channel MOS transistor with a withstand voltage of 600V, the relay K3 is a two-way Z-type normally closed relay, two ends of the voltage dependent resistor RV 3 are connected to two ends of the common input interface P, one end of the resistor R3 is connected to one end of the voltage dependent resistor RV 3, the other end of the resistor R3 is connected to one end of the capacitor C3 and an anode of the diode D3, a cathode of the diode D3 is connected to a cathode of the TVS diode D3, an anode of the diode D3 is connected to one end of the resistor R3, and another end of the resistor R3 is connected to one end of the, One end of a capacitor C9 and a grid of a MOS transistor Q2, the other end of the capacitor C2, the other end of a TVS diode D12, the other end of a resistor R7, the other end of a capacitor C9 and a source of the MOS transistor Q2 are respectively connected with the other end of a piezoresistor RV1, a drain of the MOS transistor Q2 is connected with one end of a coil of a relay K1, the other end of the coil of the relay K1 is connected with one end of a resistor R21, a diode D13 is connected in parallel with two ends of the coil of the relay K1, the other end of a resistor R21 is connected with a cathode of a diode D2, a resistor R2 is connected in parallel with two ends of a resistor R21, an anode of the diode D2 is respectively connected with one end of a common input interface P, one end of a normally closed contact of the relay K1 and one end of a normally open contact of the relay K1 are both connected with one end of the common input interface P, the normally closed, the other end of the normally open contact of relay K1 and the other end output of public input interface P are direct current 24V voltage all the way, alternating current-direct current converting circuit includes rectifier circuit, filter circuit and switching power supply control circuit, switching power supply control circuit adopts the switching power supply chip that the model is OB2371 to realize the stable output of second way direct current 24V voltage.
According to the above embodiment, the working principle of the present invention is: the 24V direct current power supply circuit compatible with 220V alternating current or 24V direct current input is provided with a power supply selection circuit, when the public input interface P is connected with alternating current 220V voltage, a resistor R4 and a capacitor C2 form a resistance-capacitance voltage reduction circuit, the reduced voltage is not enough to drive the MOS transistor Q2 to be conducted, therefore, the 220V alternating current voltage is connected to an alternating current-direct current conversion circuit through a normally closed loop of a relay K1, and a second path of direct current 24V voltage is output from the alternating current-direct current conversion circuit; when the common input interface P is connected with a direct current 24V voltage, the capacitor C2 is equivalent to an open circuit, the direct current 24V voltage is enough to drive the MOS transistor Q2 to be conducted, the coil of the relay K1 is electrified to work, the relay K1 is switched to a normally open loop, the power supply selection circuit directly outputs the direct current 24V voltage, the direct current 24V voltage can be output no matter the input alternating current 220V voltage or the direct current 24V voltage is adopted, and the direct current 12V voltage and the direct current 5V voltage are obtained through the 12V direct current voltage conversion circuit and the 5V direct current voltage conversion circuit respectively.
Claims (5)
1. A 24V dc power supply circuit compatible with 220V ac or 24V dc input, comprising: the power supply system comprises a power supply selection circuit and an alternating current-direct current conversion circuit, wherein the input end of the power supply selection circuit is connected with external alternating current 220V voltage or direct current 24V voltage, the output end of the power supply selection circuit is connected with the input end of the alternating current-direct current conversion circuit, the output end of the power supply selection circuit outputs the first path of direct current 24V voltage, and the output end of the alternating current-direct current conversion circuit outputs the second path of direct current 24V voltage.
2. The 24 vdc power supply circuit according to claim 1 compatible with 220 vac or 24 vdc input, wherein: the power supply selection circuit comprises a common input interface P, a voltage dependent resistor RV1, a resistor R1, a capacitor C1, a diode D1, a TVS diode D1, a MOS tube Q1 and a relay K1, wherein two ends of the voltage dependent resistor RV1 are connected with two ends of the common input interface P, one end of the resistor R1 is connected with one end of the voltage dependent resistor RV1, the other end of the resistor R1 is connected with one end of the capacitor C1 and the anode of the diode D1, the cathode of the diode D1 is connected with one end of the TVS diode D1 and the cathode of the diode D1, the anode of the diode D1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with one end of the resistor R1, one end of the capacitor C1, the gate of the MOS tube Q1, the other end of the capacitor C1 and the other end of the diode S1, The other end of the capacitor C9 and the source electrode of the MOS transistor Q2 are respectively connected with the other end of the piezoresistor RV1, the drain of the MOS transistor Q2 is connected with one end of the coil of the relay K1, the other end of the coil of the relay K1 is connected with one end of a resistor R21, a diode D13 is connected in parallel with two ends of the coil of the relay K1, the other end of a resistor R21 is connected with the cathode of a diode D2, a resistor R2 is connected in parallel with two ends of a resistor R21, the positive pole of diode D2 connects the one end of public input interface P respectively, the one end of public input interface P is all connected to the one end of relay K1's normally closed contact and the one end of relay K1's normally open contact, and the input of alternating current-direct current conversion circuit is connected respectively to the other end of relay K1's normally closed contact and the other end of public input interface P, and relay K1's normally open contact's the other end and the other end of public input interface P output direct current 24V voltage of the first way.
3. A 24V dc power supply circuit compatible with 220V ac or 24V dc input according to claim 1 or 2, wherein: the direct current voltage conversion circuit further comprises a 12V direct current voltage conversion circuit and a 5V direct current voltage conversion circuit, wherein the first path of direct current 24V voltage and the second path of direct current 24V voltage are both connected to the input end of the 12V direct current voltage conversion circuit and the input end of the 5V direct current voltage conversion circuit.
4. A 24V dc power supply circuit compatible with 220V ac or 24V dc input according to claim 1 or 2, wherein: the alternating current-direct current conversion circuit comprises a rectification circuit, a filter circuit and a switching power supply control circuit, and the switching power supply control circuit adopts a switching power supply chip with the model number of OB2371 to realize the stable output of the second direct current 24V voltage.
5. The 24 vdc power supply circuit according to claim 2 compatible with 220 vac or 24 vdc input, wherein: the type of MOS pipe Q2 is withstand voltage 600V's N channel MOS pipe, the type of relay K1 is two way Z type normally closed relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021602650.0U CN212627722U (en) | 2020-08-05 | 2020-08-05 | 24V direct current power supply circuit compatible with 220V alternating current or 24V direct current input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021602650.0U CN212627722U (en) | 2020-08-05 | 2020-08-05 | 24V direct current power supply circuit compatible with 220V alternating current or 24V direct current input |
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| Publication Number | Publication Date |
|---|---|
| CN212627722U true CN212627722U (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021602650.0U Active CN212627722U (en) | 2020-08-05 | 2020-08-05 | 24V direct current power supply circuit compatible with 220V alternating current or 24V direct current input |
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| Country | Link |
|---|---|
| CN (1) | CN212627722U (en) |
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- 2020-08-05 CN CN202021602650.0U patent/CN212627722U/en active Active
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