CN218920274U - A high-power isolated power supply - Google Patents

Abstract

The utility model discloses a high-power isolated power supply. The power supply includes a high-power isolated transformer. The input winding side of the transformer is connected to 220V unidirectional alternating current, and the output winding side of the transformer outputs a 220V single Phase alternating current, and the output winding output circuit of the transformer is connected to the output socket, the output socket is set as a floating ground wire, and the transformer shell is connected to the input ground wire. The utility model can protect the personal safety of maintenance personnel in the event of current grounding, short circuit, etc., and can also avoid problems such as breakdown and burning of maintenance parts, and can provide high-quality current for the maintenance of electrical accessories, and is suitable for different equipment Electricity needs.

Description

A high-power isolated power supply

technical field

The utility model belongs to the field of locomotive electronic accessories, in particular to a high-power isolated power supply.

Background technique

When repairing electrical parts of locomotives, various power sources and testing equipment are used all the time, and their safety and reliability are directly related to personal safety and the safety of maintenance parts. Since the existing power supply equipment does not adopt an isolation mechanism, personal safety accidents and accessories burning are prone to occur in the event of a short circuit or grounding. Therefore, it is necessary to develop an isolated power supply to ensure the safety of maintenance personnel and equipment.

Utility model content

In order to overcome the shortcomings and deficiencies of the prior art, the purpose of the utility model is to provide a high-power isolated power supply.

The utility model is achieved in this way, a high-power isolated power supply, the power supply includes a high-power isolation transformer, the input winding side of the transformer is connected to 220v unidirectional alternating current, and the output frequency and amplitude of the output winding side of the transformer are equal 220V single-phase alternating current, and the output winding output loop of the transformer is connected to the output socket, the output socket is set as a floating ground wire, and the transformer shell is connected to the input ground wire.

Preferably, the output sockets are 6 sets of international standard output sockets.

Preferably, the conduction loop on the input winding side of the transformer is connected with an input socket, a power switch, a fuse and a power indicator light.

Preferably, the conduction loop on the output winding side of the transformer is connected to a voltage display panel.

Preferably, the power of the transformer is 3000W.

Compared with the shortcomings and deficiencies of the prior art, the utility model has the following beneficial effects:

(1) The utility model has a power supply of 3000W, 6 outputs, adopts international standard plugs, uses a digital meter to display voltage values, and is equipped with short-circuit protection and over-current protection;

(2) The utility model adopts the principle of isolation transformer to isolate the high-voltage side (input winding side) of the electrical equipment from the inspection and measurement side (output winding side), so that the high-voltage side and the electrical appliances on the inspection and measurement side are completely insulated, and the transformer shell Connect to the input ground wire, the output socket on the inspection and measurement side is a floating ground wire, the secondary is not connected to the ground, and there is no potential difference between any secondary circuit and the ground, so it can protect maintenance personnel in the event of current grounding, short circuit, etc. Personal safety can also avoid breakdown and burning of maintenance parts.

(3) Since the oscilloscope must use a high-voltage differential probe or a high-voltage passive probe when measuring the power frequency power waveform, and the existing oscilloscope probe in the electronic training room cannot be realized, the utility model effectively solves these problems, and the device has 6 channels Standard plug, suitable for different equipment power needs;

(4) The utility model also utilizes the high-loss characteristics of the 3000W isolation transformer iron core to suppress high-frequency clutter from entering the secondary circuit and provide high-quality current for the electricity used for repairing electrical accessories.

Description of drawings

Fig. 1 is a circuit structure diagram of the utility model high-power isolated power supply.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

By analyzing the characteristics of the electrical equipment in the locomotive electronics training room and the status of the power consumption, the utility model’s isolation power supply adopts the principle of electromagnetic isolation transformer (the principle of electromagnetic isolation transformer is consistent with that of ordinary transformers, both generate current through electromagnetic induction, and input the winding It is electrically isolated from the output winding) to overcome the defects of the prior art.

Specifically, the utility model discloses a high-power isolated power supply, as shown in Figure 1, the power supply includes a high-power isolation transformer 1, the input winding side of the transformer 1 is connected to 220v unidirectional alternating current, the output winding of the transformer 1 side output 220V single-phase alternating current with equal frequency and amplitude, and the output winding output circuit of the transformer 1 is connected to the output socket 2, the output socket 2 is set as a floating ground wire, and the shell of the transformer 1 is connected to the input ground wire.

In the embodiment of the utility model, as a basic configuration, the input socket 3 , the power switch 4 , the fuse 5 and the power indicator light 6 are connected to the conduction loop on the input winding side of the transformer 1 .

In the embodiment of the present invention, in order to display the voltage of the output winding side in real time, specifically, the conduction loop of the output winding side of the transformer 1 is connected to a voltage display panel 7 .

According to the application requirements of the technical field to which the utility model belongs, specifically, from the practical application, the power of the transformer 1 is 3000W.

In order to meet the power requirements of different equipment, in the embodiment of the present utility model, the above-mentioned output sockets 2 are preferably 6 sets of international standard output sockets 2 .

The utility model adopts the working principle of the 3000W isolation transformer 1. After the 220V single-phase AC is input through the input socket 3, it is input to the input winding of the 3000W transformer 1 through the power switch 4 and the insurance, and returns to the input socket 3 through the indicator light circuit to isolate Transformer 1 is a 1:1 transformer. 220V single-phase alternating current with equal frequency and amplitude will be induced on the primary side of the transformer, which will be input to 6 sets of international standard output sockets 2 and displayed by a digital voltmeter. , Connect the input ground wire to the casing to prevent electric shock accidents caused by the internal insulation of the electrical appliance being damaged and the casing charged. The output socket 2 is a floating ground wire. Since the secondary is not connected to the ground, there is no potential difference between any of the secondary wires and the ground. The capacitance current of the system to the ground is small, which is not enough to cause harm to the human body, and can isolate dangerous voltages. Protect personal safety and testing equipment. In addition, the neutral line of the alternating current in the power supply of the utility model is grounded, and there are many small currents generated by harmonics and stray magnetic fields in the alternating current, so the interference is very large. The isolation transformer 1 is a 1:1 transformer, and the isolation transformer 1 The secondary is not connected to the ground, and all kinds of clutter are reduced, so the interference is reduced. Finally, the utility model also utilizes the high-loss characteristic of the 1 iron core of the 3000W isolation transformer to suppress high-frequency clutter from entering the secondary circuit and provide high-quality current for power consumption of electrical accessories.

Since the isolated power supply was put into use, it has effectively protected the safety of electrical equipment. For example, when the oscilloscope detects multiple currents, the problem of equipment breakdown caused by the introduction of high-voltage power-frequency alternating current at the common ground terminal has been solved, and it has also greatly protected the personal safety of maintenance personnel. , and achieved good safety benefits.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (5)

1. A high-power isolated power supply, characterized in that the power supply comprises a high-power isolation transformer, the input winding side of the transformer is connected to 220v unidirectional alternating current, and the output winding side of the transformer outputs 220V equal in frequency and amplitude Single-phase alternating current, and the output winding output loop of the transformer is connected to the output socket, the output socket is set as a floating ground wire, and the transformer shell is connected to the input ground wire. 2. The high-power isolated power supply according to claim 1, wherein the output sockets are 6 sets of international standard output sockets. 3. The high-power isolated power supply according to claim 1, wherein the conduction loop on the input winding side of the transformer is connected with an input socket, a power switch, a fuse and a power indicator light. 4. The high-power isolated power supply according to claim 1, wherein a voltage display panel is connected to the conduction loop on the output winding side of the transformer. 5. The high-power isolated power supply according to claim 1, wherein the power of the transformer is 3000W.

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