CN217769597U - Double-circuit alternating current input switching device - Google Patents
Double-circuit alternating current input switching device Download PDFInfo
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- CN217769597U CN217769597U CN202221875981.0U CN202221875981U CN217769597U CN 217769597 U CN217769597 U CN 217769597U CN 202221875981 U CN202221875981 U CN 202221875981U CN 217769597 U CN217769597 U CN 217769597U
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Abstract
The application relates to the technical field of power supplies, and discloses a double-path alternating current input switching device which comprises a first input alternating current power supply, a second input alternating current power supply, an alternating current output power supply, a switching unit, a trigger circuit and a control unit; the switching unit comprises a first silicon controlled assembly and a second silicon controlled assembly, a first input alternating current power supply is connected with a main electrode of the first silicon controlled assembly, a second input alternating current power supply is connected with a main electrode of the second silicon controlled assembly, and alternating current output power supplies are connected with the other main electrode of the first silicon controlled assembly and the other main electrode of the second silicon controlled assembly; the first silicon controlled component comprises a first unidirectional silicon controlled rectifier and a second unidirectional silicon controlled rectifier which are connected in parallel in an opposite direction, and the second silicon controlled component comprises a third unidirectional silicon controlled rectifier and a fourth unidirectional silicon controlled rectifier which are connected in parallel in an opposite direction; the gate poles of the unidirectional silicon controlled rectifiers are respectively connected with the control unit through corresponding trigger circuits. The circuit switching is reliable and high, the switching speed is high, the circuit design is simplified, and the requirement of high-power electric equipment can be met.
Description
Technical Field
The application relates to the technical field of power supplies, in particular to a double-path alternating current input switching device.
Background
Power supplies are widely used in electronic products and devices, and are devices that supply power to the electronic products and devices. With the development of technology, the performance and quality of power supplies for electronic products and devices are more and more demanding. In order to ensure the reliability of input power supply, some power supplies use double-input power supplies for power supply, a double-path alternating current power supply switching device is a device for switching and controlling two paths of alternating current power supplies, one path of the switched two paths of alternating current power supplies is a common power supply, the other path of the switched two paths of alternating current power supplies is a standby power supply, and when the common power supply fails or has power failure, the two paths of alternating current power supplies are automatically switched to the standby power supply through the double-path alternating current power supply switching device, so that a load can still normally operate.
The existing double-circuit switching device has the problems of low switching reliability and low switching speed due to the fact that the circuit is complex and the response of components is correspondingly slow due to the design problem of the switching circuit. In addition, most of the currently adopted two-way power supply switching devices provide reliable power supplies for small-power equipment, and are difficult to be suitable for power supply switching of high-power electric equipment.
SUMMERY OF THE UTILITY MODEL
In order to improve the reliability and switching speed of dual-input power switching, simplify the circuit design and meet the requirements of high-power electric equipment, the application provides a double-path alternating current input switching device.
The above application purpose of the present application is achieved by the following technical solutions:
a double-path alternating current input switching device comprises a first input alternating current power supply, a second input alternating current power supply, an alternating current output power supply, a switching unit, a trigger circuit and a control unit; the switching unit comprises a first silicon controlled assembly and a second silicon controlled assembly, a first input alternating current power supply is connected with a main electrode of the first silicon controlled assembly, a second input alternating current power supply is connected with a main electrode of the second silicon controlled assembly, and alternating current output power supplies are connected with the other main electrode of the first silicon controlled assembly and the other main electrode of the second silicon controlled assembly; the first silicon controlled rectifier assembly comprises a first unidirectional silicon controlled rectifier and a second unidirectional silicon controlled rectifier which are connected in parallel in an opposite direction, and the second silicon controlled rectifier assembly comprises a third unidirectional silicon controlled rectifier and a fourth unidirectional silicon controlled rectifier which are connected in parallel in the opposite direction; and the gate poles of the first unidirectional silicon controlled rectifier, the second unidirectional silicon controlled rectifier, the third unidirectional silicon controlled rectifier and the fourth unidirectional silicon controlled rectifier are respectively connected with the control unit through corresponding trigger circuits.
By adopting the technical scheme, a first input alternating current power supply is connected with a main electrode of a first silicon controlled assembly, a second input alternating current power supply is connected with a main electrode of a second silicon controlled assembly, alternating current output power supplies are connected with the other main electrode of the first silicon controlled assembly and the other main electrode of the second silicon controlled assembly, the first silicon controlled assembly comprises a first unidirectional silicon controlled rectifier and a second unidirectional silicon controlled rectifier which are reversely connected in parallel, the second silicon controlled assembly comprises a third unidirectional silicon controlled rectifier and a fourth unidirectional silicon controlled rectifier which are reversely connected in parallel, a control unit triggers gate poles of the corresponding unidirectional silicon controlled rectifiers through a trigger circuit to control the first silicon controlled assembly and the second silicon controlled assembly to be switched on or off, and when one path of alternating current input power supply fails, the other path of alternating current input power supply can be switched rapidly; the controllable silicon component adopts two unidirectional controllable silicon which are reversely connected in parallel, so that the two unidirectional controllable silicon can be alternately switched on or off, and the requirement of high-power electric equipment is met.
Preferably, a first resistor is connected between the gate pole and the cathode of the first unidirectional silicon controlled rectifier, a second resistor is connected between the gate pole and the cathode of the second unidirectional silicon controlled rectifier, a third resistor is connected between the gate pole and the cathode of the third unidirectional silicon controlled rectifier, and a fourth resistor is connected between the gate pole and the cathode of the fourth unidirectional silicon controlled rectifier.
By adopting the technical scheme, the resistor is connected between the gate pole and the cathode of the unidirectional silicon controlled rectifier, so that the unidirectional silicon controlled rectifier can be effectively prevented from being triggered by mistake.
Preferably, the first input ac power supply is connected to the first detection unit, the second input ac power supply is connected to the second detection unit, and the first detection unit and the second detection unit are respectively connected to the control unit.
By adopting the technical scheme, the first detection unit and the second detection unit can detect relevant parameters of the first input alternating current power supply and the second input alternating current power supply in real time, and when one of the first input alternating current power supply or the second input alternating current power supply is abnormal, the control unit controls the first silicon controlled assembly or the second silicon controlled assembly to be switched on or off, so that the other input alternating current power supply can be switched rapidly.
Preferably, the first detection unit includes a first voltage detection module and a first current detection module for detecting the voltage and the current of the first input ac power supply; and the second voltage detection module and the second current detection module are used for detecting the voltage and the current of the second input alternating current power supply.
By adopting the technical scheme, the voltage detection module and the current detection module can detect the voltage and the current of the first input alternating current power supply and the second input alternating current power supply in real time and transmit the voltage and the current to the control unit, and the control unit sends corresponding trigger signals according to the information.
Preferably, the first voltage detection module and the second voltage detection module are both HT70 series voltage detection chips; the first current detection module and the second current detection module are MAX471 series current detection chips.
Preferably, the first unidirectional silicon controlled rectifier, the second unidirectional silicon controlled rectifier, the third unidirectional silicon controlled rectifier and the fourth unidirectional silicon controlled rectifier are respectively connected with a protector in series between the corresponding trigger circuit.
By adopting the technical scheme, the protector is connected between the unidirectional silicon controlled rectifier and the trigger circuit in series, so that the gate pole current and surge current of the unidirectional silicon controlled rectifier can be limited, and the safety of the unidirectional silicon controlled rectifier is improved.
Preferably, the protector is a resistor and an inductor which are connected in series.
By adopting the technical scheme, the resistor can be used for limiting the current flowing through the gate pole of the unidirectional silicon controlled rectifier, the inductor can be used for reducing the surge current passing through the gate pole of the unidirectional silicon controlled rectifier when the unidirectional silicon controlled rectifier is triggered, and the reliability of the unidirectional silicon controlled rectifier is effectively protected.
Preferably, the first input alternating current power supply and the second input alternating current power supply are both single-phase power supplies, live wires of the first input alternating current power supply and the second input alternating current power supply are respectively connected to the first silicon controlled assembly and the second silicon controlled assembly, the other main electrodes of the first silicon controlled assembly and the second silicon controlled assembly are both connected with the live wire of the alternating current output power supply, and zero lines of the first input alternating current power supply, the second input alternating current power supply and the alternating current output power supply are shared.
By adopting the technical scheme, the first input alternating current power supply and the second input alternating current power supply can be quickly switched by controlling the connection or disconnection of the first silicon controlled assembly or the second silicon controlled assembly.
Preferably, the trigger circuit is a photocoupling trigger circuit.
To sum up, the beneficial technical effect of this application does:
this application is through setting up the main electrode that first input alternating current power supply connects first silicon controlled rectifier subassembly, the second input alternating current power supply connects the main electrode of second silicon controlled rectifier subassembly, alternating current output power all is connected with another main electrode of first silicon controlled rectifier subassembly and another main electrode of second silicon controlled rectifier subassembly, first silicon controlled rectifier subassembly includes reverse parallel first one-way silicon controlled rectifier and the one-way silicon controlled rectifier of second, the second silicon controlled rectifier subassembly includes reverse parallel third one-way silicon controlled rectifier and the one-way silicon controlled rectifier of fourth, the control unit triggers first silicon controlled rectifier subassembly or the switch-on or disconnection of second silicon controlled rectifier subassembly through control, realize the fast switch-over of two way alternating current input power.
Drawings
Fig. 1 is a functional block diagram of the present application.
Figure, 1, a first input ac power source; 2. a second input AC power supply; 3. an AC output power supply; 4. a switching unit; 41. a first thyristor assembly; 42. a second thyristor assembly; 5. a trigger circuit; 6. a control unit; 7. a first detection unit; 8. a second detection unit; 9. a protector;
q1, a first unidirectional silicon controlled rectifier; q2, a second unidirectional silicon controlled rectifier; q3, a third unidirectional silicon controlled rectifier; q4, a fourth unidirectional silicon controlled rectifier; r1 and a first resistor; r2 and a second resistor; r3 and a third resistor; r4 and a fourth resistor.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
As shown in fig. 1, a two-way ac input switching device includes a first input ac power supply 1, a second input ac power supply 2, an ac output power supply 3, a switching unit 4, a trigger circuit 5, and a control unit 6; the switching unit 4 comprises a first thyristor assembly 41 and a second thyristor assembly 42, a first input alternating current power supply 1 is connected with a main electrode of the first thyristor assembly 41, a second input alternating current power supply 2 is connected with a main electrode of the second thyristor assembly 42, and alternating current output power supplies 3 are both connected with the other main electrode of the first thyristor assembly 41 and the other main electrode of the second thyristor assembly 42; the first silicon controlled component 41 comprises a first unidirectional silicon controlled rectifier Q1 and a second unidirectional silicon controlled rectifier Q2 which are connected in parallel in an opposite direction, namely, the anode of the first unidirectional silicon controlled rectifier Q1 is connected with the cathode of the second unidirectional silicon controlled rectifier Q2, the second silicon controlled component 42 comprises a third unidirectional silicon controlled rectifier Q3 and a fourth unidirectional silicon controlled rectifier Q4 which are connected in parallel in an opposite direction, namely, the cathode of the third unidirectional silicon controlled rectifier Q3 is connected with the anode of the fourth unidirectional silicon controlled rectifier Q4; the gate poles of the first unidirectional silicon controlled rectifier Q1, the second unidirectional silicon controlled rectifier Q2, the third unidirectional silicon controlled rectifier Q3 and the fourth unidirectional silicon controlled rectifier Q4 are respectively connected with the control unit 6 through the corresponding trigger circuits 5, the trigger circuits 5 can be selected to be photoelectric coupling trigger circuits, and the control unit 6 triggers the gate poles of the corresponding unidirectional silicon controlled rectifiers through the trigger circuits 5, so that the first silicon controlled rectifier assembly 41 and the second silicon controlled rectifier assembly 42 are controlled to be connected or disconnected.
The first input alternating current power supply 1 and the second input alternating current power supply 2 of the embodiment are both single-phase power supplies, live wires of the first input alternating current power supply 1 and the second input alternating current power supply 2 are respectively connected to the first silicon controlled assembly 41 and the second silicon controlled assembly 42, the other main electrodes of the first silicon controlled assembly 41 and the second silicon controlled assembly 42 are both connected with the live wire of the alternating current output power supply 3, and zero lines of the first input alternating current power supply 1, the second input alternating current power supply 2 and the alternating current output power supply 3 are shared.
In one embodiment, in order to prevent the false triggering of the unidirectional silicon controlled rectifiers, a first resistor R1 is connected between the gate and the cathode of the first unidirectional silicon controlled rectifier Q1, a second resistor R2 is connected between the gate and the cathode of the second unidirectional silicon controlled rectifier Q2, a third resistor R3 is connected between the gate and the cathode of the third unidirectional silicon controlled rectifier Q3, and a fourth resistor R4 is connected between the gate and the fourth output of the fourth unidirectional silicon controlled rectifier Q4.
The first input alternating current power supply 1 is connected with the first detection unit 7, the second input alternating current power supply 2 is connected with the second detection unit 8, and the first detection unit 7 and the second detection unit 8 are respectively connected with the control unit 6.
In this embodiment, the first detection unit 7 includes a first voltage detection module and a first current detection module for detecting the voltage and current of the first input ac power supply 1; and the second voltage detection module and the second current detection module are used for detecting the voltage and the current of the second input alternating current power supply 2.
Specifically, the first voltage detection module and the second voltage detection module are both HT70 series voltage detection chips; the first current detection module and the second current detection module are MAX471 series current detection chips. By detecting the voltage and current parameters of the first input alternating current power supply 1 and the second input alternating current power supply 2, when one path of related parameters is abnormal, the control unit 6 sends a corresponding trigger signal to realize the switching between the first silicon controlled assembly 41 and the second silicon controlled assembly 42, so that the alternating current output power supply 3 can be provided with uninterrupted power.
In an embodiment, a protector 9 is respectively connected in series between the first unidirectional silicon controlled rectifier Q1, the second unidirectional silicon controlled rectifier Q2, the third unidirectional silicon controlled rectifier Q3 and the fourth unidirectional silicon controlled rectifier Q4 and the corresponding trigger circuit 5, and the protector 9 is a resistor and an inductor which are connected in series. The resistor of the protector 9 is used for limiting the current flowing through the gate pole of the unidirectional silicon controlled rectifier, the inductor is used for reducing the surge current passing through the gate pole of the unidirectional silicon controlled rectifier when the unidirectional silicon controlled rectifier is triggered, and the control reliability of the first unidirectional silicon controlled rectifier Q1, the second unidirectional silicon controlled rectifier Q2, the third unidirectional silicon controlled rectifier Q3 and the fourth unidirectional silicon controlled rectifier Q4 is effectively guaranteed.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A double-path alternating current input switching device is characterized by comprising a first input alternating current power supply (1), a second input alternating current power supply (2), an alternating current output power supply (3), a switching unit (4), a trigger circuit (5) and a control unit (6); the switching unit (4) comprises a first silicon controlled assembly (41) and a second silicon controlled assembly (42), the first input alternating current power supply (1) is connected with a main electrode of the first silicon controlled assembly (41), the second input alternating current power supply (2) is connected with a main electrode of the second silicon controlled assembly (42), and the alternating current output power supply (3) is connected with the other main electrode of the first silicon controlled assembly (41) and the other main electrode of the second silicon controlled assembly (42); the first silicon controlled component (41) comprises a first unidirectional silicon controlled rectifier (Q1) and a second unidirectional silicon controlled rectifier (Q2) which are connected in parallel in an opposite direction, and the second silicon controlled rectifier component (42) comprises a third unidirectional silicon controlled rectifier (Q3) and a fourth unidirectional silicon controlled rectifier (Q4) which are connected in parallel in an opposite direction; the gate poles of the first unidirectional controllable silicon (Q1), the second unidirectional controllable silicon (Q2), the third unidirectional controllable silicon (Q3) and the fourth unidirectional controllable silicon (Q4) are respectively connected with the control unit (6) through corresponding trigger circuits (5).
2. The dual ac input switching device according to claim 1, wherein a first resistor (R1) is connected between the gate and the cathode of the first unidirectional thyristor (Q1), a second resistor (R2) is connected between the gate and the cathode of the second unidirectional thyristor (Q2), a third resistor (R3) is connected between the gate and the cathode of the third unidirectional thyristor (Q3), and a fourth resistor (R4) is connected between the gate and the cathode of the fourth unidirectional thyristor (Q4).
3. The dual ac input switching device according to claim 1, wherein the first input ac power source (1) is connected to a first detection unit (7), the second input ac power source (2) is connected to a second detection unit (8), and the first detection unit (7) and the second detection unit (8) are respectively connected to the control unit (6).
4. A two-way alternating current input switching device according to claim 3, wherein the first detecting unit (7) comprises a first voltage detecting module and a first current detecting module for detecting the voltage and the current of the first input alternating current power supply (1); and the second voltage detection module and the second current detection module are used for detecting the voltage and the current of the second input alternating current power supply (2).
5. The dual-channel alternating current input switching device according to claim 4, wherein the first voltage detection module and the second voltage detection module are HT70 series voltage detection chips; the first current detection module and the second current detection module are MAX471 series current detection chips.
6. The dual ac input switching device of claim 1, wherein a protector (9) is connected in series between each of the first (Q1), second (Q2), third (Q3) and fourth (Q4) unidirectional thyristors and the corresponding trigger circuit (5).
7. A two-way AC input switching device according to claim 6, wherein said protector (9) is a series resistor and inductor.
8. The dual-input alternating-current input switching device according to claim 1, wherein the first input alternating-current power supply (1) and the second input alternating-current power supply (2) are both single-phase power supplies, the live wires of the first input alternating-current power supply (1) and the second input alternating-current power supply (2) are respectively connected to the main electrodes of the first thyristor assembly (41) and the second thyristor assembly (42), the other main electrodes of the first thyristor assembly (41) and the second thyristor assembly (42) are both connected with the live wire of the alternating-current output power supply (3), and the zero wires of the first input alternating-current power supply (1), the second input alternating-current power supply (2) and the alternating-current output power supply (3) are shared.
9. A two-way alternating current input switching device according to claim 1, wherein the trigger circuit (5) is an opto-coupled trigger circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221875981.0U CN217769597U (en) | 2022-07-20 | 2022-07-20 | Double-circuit alternating current input switching device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221875981.0U CN217769597U (en) | 2022-07-20 | 2022-07-20 | Double-circuit alternating current input switching device |
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| CN217769597U true CN217769597U (en) | 2022-11-08 |
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| CN202221875981.0U Active CN217769597U (en) | 2022-07-20 | 2022-07-20 | Double-circuit alternating current input switching device |
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- 2022-07-20 CN CN202221875981.0U patent/CN217769597U/en active Active
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