A portable AC / DC dual-mode output power supply device

Abstract

The utility model relates to a portable AC-DC dual-mode output power supply device, belonging to the technical field of power supply. It is successively composed of 220V AC power supply, input switch QS1, rectifier element, AC-DC conversion switch QS2, universal meter and output switch SB; the firewire L and zero line N of 220V AC power supply are divided into two branches after passing through input switch QS1, one branch directly connects the AC gear of AC-DC conversion switch QS2 to form an AC branch, and the other branch connects the DC gear of AC-DC conversion switch QS2 after passing through rectifier element to form a DC branch; the rectifier element is a full-wave rectifier bridge circuit, and the rectified DC voltage is output from the anode of rectifier diode VD1 and the cathode of rectifier diode VD3. The utility model not only can be used for high-voltage switch characteristic test, high-voltage switch mechanical energy storage and other specific power demand, but also is suitable for AC-DC switching and power demand with certain requirement for voltage adjustment.

Description

Technical Field

[0001] This utility model belongs to the field of power supply technology, specifically relating to a lightweight AC / DC dual-mode output power supply device. Background Technology

[0002] Traditional power supply equipment typically only supports a single output mode (pure AC or pure DC). However, existing AC / DC dual-output power supplies have the following problems: (1) large size and weight: complex internal circuits, using discrete transformers and multiple independent modules, resulting in bulky equipment; (2) low conversion efficiency: high energy loss and severe heat generation during AC / DC conversion; (3) poor compatibility: fixed output interface, unable to adapt to various voltage / current requirements; therefore, there is an urgent need for an efficient, lightweight AC / DC integrated power supply device that supports flexible output. Utility Model Content

[0003] The purpose of this invention is to provide a lightweight AC / DC dual-mode output power supply device, which has the advantages of high integration, light weight, and support for AC / DC dual-mode output. It can solve the problems of large size, low efficiency and single function in the prior art. It is suitable for providing AC or DC power supply when performing operating voltage tests on high-voltage switches during preventive testing of high-voltage electrical equipment.

[0004] This utility model discloses a portable AC / DC dual-mode output power supply device, which consists of a 220V AC power supply, an input switch QS1, a rectifier, an AC / DC conversion switch QS2, a multimeter, and an output switch SB. The AC / DC conversion switch QS2 has two settings: AC and DC. The live wire L and neutral wire N of the 220V AC power supply are split into two branches after passing through the input switch QS1. One branch is directly connected to the AC setting of the AC / DC conversion switch QS2 to form an AC branch, and the other branch is connected to the DC setting of the AC / DC conversion switch QS2 after passing through the rectifier to form a DC branch. The rectifier is a full-wave rectifier bridge circuit, composed of rectifier diodes VD1, VD2, VD3, and VD4. The cathode of rectifier diode VD1 and the anode of rectifier diode VD3 are connected. The cathode of diode VD2 is connected to the anode of rectifier diode VD4, the anode of rectifier diode VD1 is connected to the anode of rectifier diode VD2, and the cathode of rectifier diode VD3 is connected to the cathode of rectifier diode VD4. In the DC branch, the live wire L of the 220V AC power supply is connected between the cathode of rectifier diode VD1 and the anode of rectifier diode VD3 after passing through the input switch QS1. The neutral wire N of the 220V AC power supply is connected between the cathode of rectifier diode VD2 and the anode of rectifier diode VD4 after passing through the input switch QS1. The rectified DC voltage is output from the anode of rectifier diode VD1 (i.e., the anode of rectifier diode VD2) and the cathode of rectifier diode VD3 (i.e., the cathode of rectifier diode VD4). A multimeter is connected in parallel to the output terminal of AC / DC conversion switch QS2.

[0005] The power supply device of this utility model has the following performance indicators and technical features:

[0006] 1. Circuit topology:

[0007] AC input → Input switch QS1 → Rectifier element → AC / DC conversion switch QS2 → Multimeter → Output switch SB;

[0008] 2. Key technical features

[0009] Parallel output architecture: The AC branch is directly led out from the input of the rectifier bridge, retaining the original 50Hz sine wave;

[0010] 3. Signal monitoring

[0011] The multimeter monitors and displays the DC output voltage value in real time.

[0012] 4. Design of core technical parameters

[0013] (1) Output voltage: AC branch 0~220V, DC branch without filter 0~198V;

[0014] (2) Output capacity: The AC branch is limited by the rated current of the input switch QS1, while the DC branch is determined by the current specification of the rectifier diodes.

[0015] 5. Component Function Description

[0016] (1) Input switch QS1: controls the on / off state of the circuit and provides overload protection;

[0017] (2) Rectifier bridge: full-wave rectification, AC→DC conversion, withstand voltage ≥600V;

[0018] (3) AC / DC conversion switch QS2: AC / DC conversion switch with two positions, namely AC position and DC position;

[0019] (4) Multimeter: Monitors DC output voltage, range 0~400VDC, accuracy class 0.5;

[0020] (5) Output switch SB: Manually control the on / off state of the output terminal as needed.

[0021] The AC / DC dual-mode output power supply device of this utility model has the following advantages:

[0022] First: The equipment has a simple structure.

[0023] Under the premise of meeting the AC / DC dual-mode output requirements, the equipment consists of only 5 components: input switch QS1, rectifier, AC / DC conversion switch QS2, multimeter, and output switch SB.

[0024] Second: Simple processing technology

[0025] There are no other processes besides connecting electrical components with wires;

[0026] Third: Extremely low manufacturing cost, components are readily available.

[0027] All components used are common parts that can be assembled by repairing and reusing old ones. The input switch QS1 is a Schneider Multi9KVD215A / 250V, the rectifier is a Kun Erjing ZP10A, the AC / DC changeover switch QS2 is a Senao SA39, the multimeter is a Duoyi multimeter DY2105, and the output switch SB is a KCD15A / 250V.

[0028] Fourth: Safety

[0029] It enables dual safety for both personnel and equipment. The equipment is equipped with an input switch QS1 to provide overload protection, ensuring the safety of operators.

[0030] Fifth: High measurement accuracy

[0031] By employing precision rectification, the diode voltage drop error can be reduced from the traditional 0.7 class to 0.1 class, significantly improving the DC output accuracy;

[0032] Sixth: Applicable to a wide range of scenarios

[0033] This invention can be used not only for specific power needs such as high-voltage switch characteristic testing and high-voltage switch mechanical energy storage, but also for AC / DC switching and power needs with certain requirements for voltage adjustability. Attached Figure Description

[0034] Figure 1 Schematic diagram of AC / DC dual-mode output;

[0035] The names of each part are as follows: 1 is 220V AC power supply, 2 is input switch QS1, 3 is rectifier, 4 is AC / DC conversion switch QS2, 5 is multimeter, and 6 is output switch SB. Detailed Implementation

[0036] Example 1

[0037] This utility model discloses a portable AC / DC dual-mode output power supply device, which consists of a 220V AC power supply, an input switch QS1, a rectifier, an AC / DC conversion switch QS2, a multimeter, and an output switch SB. The AC / DC conversion switch QS2 has two settings: AC and DC. The live wire L and neutral wire N of the 220V AC power supply are split into two branches after passing through the input switch QS1. One branch is directly connected to the AC setting of the AC / DC conversion switch QS2 to form an AC branch, and the other branch is connected to the DC setting of the AC / DC conversion switch QS2 after passing through the rectifier to form a DC branch. The rectifier is a full-wave rectifier bridge circuit, composed of rectifier diodes VD1, VD2, VD3, and VD4. The cathode of rectifier diode VD1 and the anode of rectifier diode VD3 are connected. The cathode of diode VD2 is connected to the anode of rectifier diode VD4, the anode of rectifier diode VD1 is connected to the anode of rectifier diode VD2, and the cathode of rectifier diode VD3 is connected to the cathode of rectifier diode VD4. In the DC branch, the live wire L of the 220V AC power supply is connected between the cathode of rectifier diode VD1 and the anode of rectifier diode VD3 after passing through the input switch QS1. The neutral wire N of the 220V AC power supply is connected between the cathode of rectifier diode VD2 and the anode of rectifier diode VD4 after passing through the input switch QS1. The rectified DC voltage is output from the anode of rectifier diode VD1 (i.e., the anode of rectifier diode VD2) and the cathode of rectifier diode VD3 (i.e., the cathode of rectifier diode VD4). A multimeter is connected in parallel to the output terminal of AC / DC conversion switch QS2.

[0038] A 220V AC power supply provides power to the circuit. The input switch QS1 controls the on / off state of the entire circuit's input. Utilizing the unidirectional conductivity of the diodes in the rectifier element, the input AC power is converted into DC output. The AC / DC conversion switch QS2 enables switching between AC and DC outputs to adapt to different power requirements. A multimeter is connected in parallel to the output terminal to monitor the output voltage value in real time and measure the operating voltage. The output switch SB controls the on / off state of the entire circuit's output.

[0039] AC input stage: Connect the live wire L and neutral wire N of the 220V AC power supply to the input switch QS1, switch the AC / DC conversion switch QS2 to the AC position, and the power supply device outputs 220V AC power. The AC voltage value can be measured by a multimeter, and the output is controlled by the output switch SB.

[0040] Rectification and Conversion Stage: During the positive half-cycle of AC input, the live wire L is at a high potential and the neutral wire N is at a low potential. The live wire L and neutral wire N of the 220V AC power supply enter the rectifier element after passing through the input switch QS1, reaching the cathode of rectifier diode VD1 and the anode of rectifier diode VD3, as well as the cathode of rectifier diode VD2 and the anode of rectifier diode VD4. At this time, rectifier diodes VD1 and VD4 are cut off due to the reverse bias voltage applied, while rectifier diodes VD2 and VD3 are turned on due to the forward bias voltage applied. During the negative half-cycle of the AC input, the live wire (L) is at a high potential, and the neutral wire (N) is at a low potential. The live wire (L) and neutral wire (N) of the 220V AC power supply enter the rectifier elements after passing through the input switch QS1, reaching the cathode of rectifier diode VD2 and the anode of rectifier diode VD4, as well as the cathode of rectifier diode VD1 and the anode of rectifier diode VD3. At this time, rectifier diodes VD4 and VD1 are cut off due to the reverse bias voltage applied, while rectifier diodes VD2 and VD3 are turned on due to the forward bias voltage applied. In summary, during the entire AC input phase, rectifier diodes VD2 and VD3 are turned on, while rectifier diodes VD1 and VD4 are cut off, thus converting AC to DC. Switching the AC / DC converter switch QS2 to the DC setting allows the DC voltage value to be measured with a multimeter, and the output is controlled by the output switch SB.

Claims

1. A portable AC / DC dual-mode output power supply device, characterized in that: The circuit consists of a 220V AC power supply (1), an input switch QS1 (2), a rectifier (3), an AC / DC conversion switch QS2 (4), a multimeter (5), and an output switch SB (6). The AC / DC conversion switch QS2 has two positions: AC and DC. The live wire L and neutral wire N of the 220V AC power supply (1) are split into two branches after passing through the input switch QS1 (2). One branch is directly connected to the AC position of the AC / DC conversion switch QS2 (4) to form an AC branch, and the other branch is connected to the DC position of the AC / DC conversion switch QS2 (4) after passing through the rectifier to form a DC branch. The rectifier is a full-wave rectifier bridge circuit, consisting of rectifier diodes VD1, VD2, VD3, and VD4. The cathode of rectifier diode VD1 and the anode of rectifier diode VD3 are connected to the DC position of rectifier diode VD4. The cathode of rectifier diode VD2 is connected to the anode of rectifier diode VD4, the anode of rectifier diode VD1 is connected to the anode of rectifier diode VD2, and the cathode of rectifier diode VD3 is connected to the cathode of rectifier diode VD4. In the DC branch, the live wire L of the 220V AC power supply (1) is connected between the cathode of rectifier diode VD1 and the anode of rectifier diode VD3 after passing through the input terminal switch QS1 (2), and the neutral wire N of the 220V AC power supply is connected between the cathode of rectifier diode VD2 and the anode of rectifier diode VD4 after passing through the input terminal switch QS1. The DC voltage after rectification by the rectifier element (3) is output from the anode of rectifier diode VD1 and the cathode of rectifier diode VD3. The multimeter (5) is connected in parallel to the output terminal of the AC / DC conversion switch QS2 (4).

2. The portable AC / DC dual-mode output power supply device as described in claim 1, characterized in that: A 220V AC power supply (1) provides power to the circuit. The input switch QS1 (2) controls the on / off state of the entire circuit's input terminal, and the output switch SB (6) controls the on / off state of the entire circuit's output terminal.

3. The portable AC / DC dual-mode output power supply device as described in claim 1, characterized in that: The input switch QS1(2) is Schneider Multi9KVD215A / 250V, the rectifier (3) is Kun Erjing ZP10A, the AC / DC conversion switch QS2(4) is Senao SA39, the multimeter (5) is Duoyi multimeter DY2105, and the output switch SB(6) is KCD15A / 250V.

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