Phase filter

Abstract

The utility model relates to the technical field of filters, in particular to a phase filter. Comprising a case, a shock absorber is arranged on the case, a liquid cooling plate is arranged in the case, a cooling passage is arranged at the bottom of the liquid cooling plate, a cooling liquid inlet and a cooling liquid outlet are arranged outside the case, and the cooling liquid inlet and the cooling liquid outlet are oppositely arranged and both communicated with the cooling passage; a first filter path and a second filter path are further arranged in the machine box, the first filter path and the second filter path are mutually independent, and the first filter path and the second filter path each comprise a temperature control circuit breaker. According to the phase filter, the inductance device is used for reducing capacitive hazards in a three-phase alternating current power grid, the temperature control circuit breaker is arranged to guarantee safe operation of the filter, and a liquid cooling heat dissipation mode is adopted to guarantee stable and continuous operation of the filter.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a phase filter. Background Art

[0002] Capacitive and inductive loads are the basic components of electronic equipment. As the number of devices with capacitance parameters connected to the circuit increases, capacitive hazards will be caused. Capacitive hazards in circuits mainly include the following aspects:

[0003] Current shock: When a capacitive load is suddenly connected to the power grid, it will cause a current shock, resulting in overload operation of the transformer. Long-term overload operation will affect the insulation strength and loss of the transformer, and may even cause overheating and damage to the transformer; Voltage fluctuation: The connection of a capacitive load will cause an instantaneous change in the grid voltage, which will affect the voltage quality of the transformer. High-frequency current will cause voltage fluctuations, which will lead to deterioration of voltage quality; Noise pollution: Capacitive loads will generate high-frequency noise at the moment of switching, which will cause noise pollution to the transformer. These noises will cause changes in the gas in the transformer oil, thereby affecting the insulation strength of the transformer and causing transformer failure; Phase lag: The phase lag caused by capacitive loads will lead to unstable power supply; Current waveform distortion: Capacitive loads will generate high-frequency noise at the moment of switching. This severely distorted current waveform contains a large number of harmonic components, causing a serious decrease in the line power factor. It not only reduces the efficiency of power supply, but more seriously, it will cause severe waveform distortion of the AC voltage when the power supply line capacity is insufficient or the circuit load is large, and generate multiple harmonics, thereby interfering with the normal operation of other electrical appliances.

[0004] Therefore, in order to reduce the above-mentioned capacitive hazards, it is necessary to design a filter that can avoid capacitive hazards. After the filter is connected in parallel with a device with capacitance parameters, the capacitive hazards can be reduced, and the filter can dissipate heat better to achieve a stable operation effect. Utility Model Content

[0005] Problem to be solved: Design a filter with heat dissipation function to solve the problem of excessive capacitive load of three-phase AC power supply.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a phase filter, including a chassis, a vibration damper is provided on the chassis, a liquid cooling plate is provided in the chassis, a cooling passage is provided at the bottom of the liquid cooling plate, a coolant inlet and a coolant outlet are provided outside the chassis, the coolant inlet and the coolant outlet are arranged opposite to each other and are both connected to the cooling passage; the chassis also includes filter path 1 and filter path 2, filter path 1 and filter path 2 are independent of each other, and both filter path 1 and filter path 2 include temperature control circuit breakers.

[0007] Preferably, the temperature-controlled circuit breaker includes temperature-controlled circuit breaker 1 and temperature-controlled circuit breaker 2, wherein temperature-controlled circuit breaker 1 is located in filter line 1, and temperature-controlled circuit breaker 2 is located in filter line 2.

[0008] Preferably, the filter also includes a power connector 1, the power connector 1 is connected to a contactor 1 through an air switch 1, and the contactor 1 is connected to an inductor 1.

[0009] Preferably, the second filter path also includes a second power connector, the second power connector is connected to a second contactor via a second air switch, and the second contactor is connected to a second inductor.

[0010] Preferably, power connector 1 supplies power to temperature-controlled circuit breaker 1 and temperature-controlled circuit breaker 2 through a transformer.

[0011] Compared with the prior art, the utility model provides a phase filter with the following beneficial effects: the phase filter of the utility model is used to solve the capacitive hazards in the three-phase AC power grid. The filter of the utility model uses an inductor device, which is connected in parallel in the three-phase AC power grid to reduce the capacitive hazards in the power grid; and the phase filter uses a redundant design, using passive inductive components to compensate the power factor and phase correct the circuit, and has high reliability. A temperature-controlled circuit breaker is provided to stop the filter from working when the temperature inside the filter is too high. In case of high temperature, the power supply will be cut off in time to ensure the safety of personnel and equipment. A liquid cooling plate is provided in the chassis to reduce the volume of the filter, cool the filter, and ensure the stable operation of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the electrical schematic diagram of the filter of the utility model.

[0013] Figure 2 This is a schematic diagram of the external structure of the filter of the utility model.

[0014] Explanation of the reference numerals: 1. Chassis; 2. Shock absorber; 3. Filter one; 31. Inductor one; 32. Contactor one; 33. Power connector one; 34. Temperature control circuit breaker one; 35. Air switch one; 4. Filter two; 41. Inductor two; 42. Contactor two; 43. Power connector two; 44. Temperature control circuit breaker two; 45. Air switch two; 5. Coolant inlet; 6. Coolant outlet; 7. Transformer. DETAILED DESCRIPTION

[0015] The technical scheme in the embodiment of the present invention will be described below in conjunction with the accompanying drawings in the embodiment of the present invention:

[0016] As shown in the figure, a phase filter of the utility model includes a chassis 1, and a shock absorber 2 is provided on the chassis 1. The shock absorber 2 keeps the filter running smoothly when encountering bumps. A liquid cooling plate is provided inside the chassis 1, and a cooling passage is laid at the bottom of the liquid cooling plate to reduce the temperature inside the chassis 1. A coolant inlet 5 is provided outside the chassis 1, and a coolant outlet 6 is provided on the side opposite to the coolant inlet 5. The coolant flows into the cooling passage from the coolant inlet 5, absorbs the heat inside the chassis 1, and then flows out from the coolant outlet 6, thereby reducing the temperature inside the chassis 1 and ensuring the smooth operation of the filter.

[0017] The circuit part in the chassis 1 is as follows Figure 2 As shown, it includes filter 1-3 and filter 2-4. Filter 1-3 and filter 2-4 work independently. The main circuit of filter 1-3 includes power connector 1-33. Power connector 1-33 is connected to contactor 1-32 through air switch 1-35. Air switch 1-35 controls whether contactor 1-32 is powered on. Contactor 1-32 is connected to inductor 1-31. Filter 1-3 can be connected in parallel with equipment with capacitance parameters to reduce and offset capacitive hazards. Two phases of power connector 1-33 are connected to transformer 7. Transformer 7 converts 380V into 220V and then supplies power to temperature control circuit breaker 1-34. Temperature control circuit breaker 1-34 is connected to contactor 1-32. Temperature control circuit breaker 1-34 collects temperature data in chassis 1 and cuts off the circuit when abnormal temperature is found. For example, when the internal temperature of chassis 1 is greater than 110°C, temperature control circuit breaker 1-34 is activated, contactor 1-32 is in a disconnected state, and inductor 1-31 is not powered.

[0018] The main circuit of the filter circuit 2 4 includes a power connector 2 43, which is connected to a contactor 2 42 through an air switch 2 45. The air switch 2 45 controls whether the contactor 2 42 is powered on. The contactor 2 42 is connected to the inductor 2 41. The filter circuit 2 4 can be connected in parallel with equipment with capacitance parameters to reduce and offset capacitive hazards. The transformer 7 converts 380V into 220V and then supplies power to the temperature control circuit breaker 2 44. The temperature control circuit breaker 2 44 is connected to the contactor 2 42. The temperature control circuit breaker 2 44 collects temperature data in the chassis 1 and cuts off the circuit when an abnormal temperature is found. For example, when the internal temperature of the chassis 1 is greater than 110°C, the temperature control circuit breaker 2 44 is activated, the contactor 2 42 is in a disconnected state, and the inductor 2 41 is not powered.

[0019] Filter one 3 and filter two 4 can work independently of each other or simultaneously. When one of the two fails, the other can work normally, thus ensuring the normal operation of the filter.

[0020] The model of inductor 1 31 and inductor 2 41 can be NL322A12-60.0 (three-phase 12A, 60mH), and the rated voltage of the utility model filter is three-phase 380VAC / 50Hz; the inductive current of the two paths of the utility model filter is 12A±10% (at 380VAC / 50Hz); the IP grade is IP44.

[0021] The above embodiments are only some embodiments of the utility model, not all 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.

Claims

1. A phase filter, comprising a chassis (1), on which a vibration damper (2) is provided, characterized in that: A liquid cooling plate is provided inside the chassis (1), a cooling passage is provided at the bottom of the liquid cooling plate, a cooling liquid inlet (5) and a cooling liquid outlet (6) are provided outside the chassis (1), the cooling liquid inlet (5) and the cooling liquid outlet (6) are arranged opposite to each other and are both connected to the cooling passage; the chassis (1) also includes a filter line (3) and a filter line (4), the filter line (3) and the filter line (4) are independent of each other, and both the filter line (3) and the filter line (4) include a temperature control circuit breaker.

2. A phase filter as claimed in claim 1, characterized in that: The temperature-controlled circuit breaker comprises a temperature-controlled circuit breaker 1 (34) and a temperature-controlled circuit breaker 2 (44). The temperature-controlled circuit breaker 1 (34) is located in filter line 1 (3), and the temperature-controlled circuit breaker 2 (44) is located in filter line 2 (4).

3. A phase filter as claimed in claim 2, characterized in that: The filter circuit (3) further comprises a power connector (33), the power connector (33) is connected to a contactor (32) via an air switch (35), and the contactor (32) is connected to an inductor (31).

4. A phase filter as claimed in claim 3, characterized in that: The second filter path (4) also includes a second power connector (43), the second power connector (43) is connected to a second contactor (42) through a second air switch (45), and the second contactor (42) is connected to a second inductor (41).

5. A phase filter as claimed in claim 4, characterized in that: The power connector 1 (33) supplies power to the temperature control circuit breaker 1 (34) and the temperature control circuit breaker 2 (44) through the transformer (7).

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