Ripple anti-interference test system

Abstract

The utility model discloses a ripple anti-interference test system, which comprises an artificial power supply network, a single-phase power supply quality immunity simulator, an oscilloscope, a high-voltage differential probe, an industrial personal computer, an attenuator, a power probe, a power meter and a balun, and is characterized in that the industrial personal computer is connected with the attenuator, the single-phase power supply quality immunity simulator and the power meter; the single-phase power supply quality immunity simulator is connected with the attenuator, the attenuator is connected with the power probe, the power probe is connected with the power meter, the power meter is connected with the balance-unbalance converter, the balance-unbalance converter is connected with the artificial power supply network, and the artificial power supply network is connected with a product to be tested and the high-voltage differential probe. The high-voltage differential probe is connected with an oscilloscope. Through mutual cooperation of the industrial personal computer, the attenuator, the power probe and the power meter, an interference signal sent by the single-phase power supply quality immunity simulator can be controlled within a reasonable range, and the intensity of an interference limit number can be monitored and fed back to the industrial personal computer.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-interference testing, in particular to a ripple anti-interference testing system. Background Art

[0002] In recent years, new energy vehicles have been booming. This type of vehicle uses a new power system and is completely or mainly driven by new energy. During the process of starting, driving, and charging, new energy vehicles may be accompanied by voltage fluctuations on the high-voltage power cables. Such voltage fluctuations have high peak-to-peak values ​​and large energy, which may affect the normal operation of other electrical components connected to the high-voltage power cables and pose a threat to the functionality and safety of the vehicle.

[0003] The ripple immunity test system in the prior art includes an artificial power supply network, a single-phase power quality immunity simulator, an oscilloscope and a high-voltage differential probe. An interference signal is generated by the single-phase power quality immunity simulator, and the interference signal is output to the artificial power supply network, and then output to the product to be tested through the artificial power supply network. Then, the ripple interference resistance ability of the product to be tested is evaluated by the oscilloscope and the high-voltage differential probe, thereby completing the ripple immunity test of the product to be tested.

[0004] However, the ripple immunity test system in the prior art lacks a feedback link, making it difficult to monitor and feedback the size of the interference signal, and unable to ensure the accuracy of the test conditions. Utility Model Content

[0005] The purpose of the utility model is to provide a ripple immunity test system to solve the above technical problems.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A ripple immunity test system includes an artificial power supply network, a single-phase power quality immunity simulator, an oscilloscope, a high-voltage differential probe, an industrial computer, an attenuator, a power probe, a power meter and a balanced-unbalanced converter, wherein the industrial computer is connected to the attenuator, the single-phase power quality immunity simulator and the power meter, the single-phase power quality immunity simulator is connected to the attenuator, the attenuator is connected to the power probe, the power probe is connected to the power meter, the power meter is connected to the balanced-unbalanced converter, the balanced-unbalanced converter is connected to the artificial power supply network, and the artificial power supply network is connected to a product to be tested and the high-voltage differential probe, and the high-voltage differential probe is connected to the oscilloscope.

[0008] Preferably, it further comprises a high-voltage power supply, which is connected to the artificial power supply network.

[0009] As a further preference, it further includes a transformer, and the transformer is arranged between the high voltage power supply and the artificial power supply network.

[0010] Preferably, the artificial power supply network is connected to the positive terminal and the negative terminal of the product to be tested through two high-voltage lines.

[0011] The above technical solution has the following advantages or beneficial effects:

[0012] In the utility model, through the cooperation of the industrial computer, attenuator, power probe and power meter, the interference signal emitted by the single-phase power quality immunity simulator can be controlled within a reasonable range, and the intensity of the interference limit signal can be monitored and fed back to the industrial computer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a system schematic diagram of the ripple immunity test system in the utility model.

[0014] In the figure: 1. Artificial power network; 2. Single-phase power quality immunity simulator; 3. Oscilloscope; 4. High-voltage differential probe; 5. Industrial computer; 6. Attenuator; 7. Power probe; 8. Power meter; 9. Balun; 10. Product under test; 11. High-voltage power supply; 12. Transformer. DETAILED DESCRIPTION

[0015] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] Figure 1 This is the system diagram of the ripple immunity test system in this utility model, please refer to Figure 1 As shown, a preferred embodiment is shown, the ripple immunity test system shown includes an artificial power supply network 1, a single-phase power quality immunity simulator 2, an oscilloscope 3, a high-voltage differential probe 4, an industrial computer 5, an attenuator 6, a power probe 7, a power meter 8 and a balanced-unbalanced converter 9, the industrial computer 5 is connected to the attenuator 6, the single-phase power quality immunity simulator 2 and the power meter 8, the single-phase power quality immunity simulator 2 is connected to the attenuator 6, the attenuator 6 is connected to the power probe 7, the power probe 7 is connected to the power meter 8, the power meter 8 is connected to the balanced-unbalanced converter 9, the balanced-unbalanced converter 9 is connected to the artificial power supply network 1, and the artificial power supply network 1 is connected to the product to be tested 10 and the high-voltage differential probe 4, and the high-voltage differential probe 4 is connected to the oscilloscope 3. In this embodiment, see Figure 1 As shown, the output end of the industrial computer 5 is connected to the input end of the single-phase power quality immunity simulator 2 through a connecting cable, and the single-phase power quality immunity simulator 2 is controlled by the industrial computer 5 to start working, so that the single-phase power quality immunity simulator 2 can generate an interference signal, and then the single-phase power quality immunity simulator 2 will send the interference limit signal to the attenuator 6. After being processed by the attenuator 6, the interference signal is controlled within a reasonable range, and then the interference signal is output to the power probe 7, and the power meter 8 can detect the strength of the interference signal in the power probe 7. If the strength of the interference signal is within a preset range, the power meter 8 will output the interference signal to the balanced-unbalanced converter 9, and then enter the artificial power network 1, and the artificial power network 1 will collect the interference signal to form an interference waveform, and then output it to the positive and negative ends of the product to be tested 10, and finally the performance and status of the product to be tested 10 are monitored and analyzed through the oscilloscope 3 and the high-voltage differential probe 4, and the anti-ripple interference ability evaluation of the product to be tested 10 is completed, thereby completing the ripple immunity test of the product to be tested 10.

[0019] Among them, the power meter 8 can be used to monitor the strength of the interference signal. If the strength of the interference signal is not within the preset range, the power meter 8 will send a control signal to the industrial computer 5. At this time, the industrial computer 5 will control the attenuator 6 to make the attenuator 6 adjust the strength of the interference signal until the interference signal monitored by the power meter 8 is within the preset range.

[0020] Furthermore, as a preferred embodiment, a high-voltage power supply 11 is further included, and the high-voltage power supply 11 is connected to the artificial power supply network 1. The high-voltage power supply 11 is used to supply power to the artificial power supply network 1, and a transformer 12 is provided between the high-voltage power supply 11 and the artificial power supply network 1 to adjust the voltage to avoid excessively high or low voltage.

[0021] Further, as a preferred implementation, the artificial power network 1 is connected to the positive terminal and the negative terminal of the product to be tested 10 through two high-voltage lines.

[0022] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. Ripple immunity test system, characterized in that, It includes an artificial power supply network, a single-phase power quality immunity simulator, an oscilloscope, a high-voltage differential probe, an industrial computer, an attenuator, a power probe, a power meter and a balanced-unbalanced converter. The industrial computer is connected to the attenuator, the single-phase power quality immunity simulator and the power meter, the single-phase power quality immunity simulator is connected to the attenuator, the attenuator is connected to the power probe, the power probe is connected to the power meter, the power meter is connected to the balanced-unbalanced converter, the balanced-unbalanced converter is connected to the artificial power supply network, and the artificial power supply network is connected to the product to be tested and the high-voltage differential probe, and the high-voltage differential probe is connected to the oscilloscope.

2. The ripple immunity test system according to claim 1, characterized in that: It also includes a high voltage power supply, which is connected to the artificial power supply network.

3. The ripple immunity test system according to claim 2, characterized in that: It also includes a transformer, which is arranged between the high voltage power supply and the artificial power supply network.

4. The ripple immunity test system according to claim 1, characterized in that: The artificial power supply network is connected to the positive terminal and the negative terminal of the product to be tested through two high-voltage wires.

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