A choke tuner with an isolation circuit

Abstract

This utility model discloses a choke tuner with isolation circuit, relating to the field of tuner technology. It includes a tuner housing, a capacitor, a choke coil assembly, and a display screen. The capacitor is installed inside the tuner housing, and the choke coil assembly is disposed on one side of the capacitor. The display screen is fixedly embedded in the upper surface of the tuner housing. The corners of the tuner housing are chamfered. The capacitor has an electrical specification of 20uF / 1000V, and forms an LC resonant circuit through an inductor. The tuner housing is made of FV-2 flame-retardant material with insulation class F and high-temperature resistance class F, effectively preventing fire risks. The surface of the housing is treated with chromate passivation zinc plating to form an anti-oxidation colored film, enhancing corrosion resistance. The use of a 20μF / 1000V capacitor paired with a high-saturation-current inductor meets the requirements of high-current applications, improves energy transmission efficiency, and enhances the safety of the tuner.

Description

Technical Field

[0001] This utility model relates to the field of tuner technology, and in particular to a choke tuner with isolation circuit. Background Technology

[0002] Choke tuners with isolation circuits are key components used in power electronics, communication, and automation control systems, primarily for achieving functions such as LC resonance, impedance matching, and frequency selection.

[0003] Traditional tuners typically consist of inductors, capacitors, and a housing. However, in practical applications, some tuner housings are made of ordinary metal materials, which are susceptible to environmental influences. For example, humid or high-temperature environments can easily cause corrosion or deformation of the tuner's shape, resulting in insufficient structural stability and affecting long-term reliability. Furthermore, tuners are prone to fire hazards under overload or short-circuit conditions, affecting the safety of tuner use. Utility Model Content

[0004] The purpose of this invention is to provide a choke tuner with isolation circuitry to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a choke tuner with isolation circuit, comprising:

[0006] Tuner housing;

[0007] A capacitor, wherein the capacitor is mounted in the cavity of the tuner housing;

[0008] A choke coil assembly is disposed on one side of the capacitor and installed in the inner cavity of the tuner housing;

[0009] The display screen is fixedly embedded in the upper surface of the tuner housing.

[0010] Preferably, the corners of the tuner housing are chamfered, the capacitor has an electrical specification of 20uF / 1000V, and the capacitor forms an LC resonant circuit through an inductor.

[0011] Preferably, the inductor is led out using its own lead, and there is a margin between the capacitor lead and the terminal block of the inductor and tuner housing.

[0012] Preferably, the inductor is connected to the capacitor by making a loop with the wire itself, the capacitor leads are sleeved with a sleeve, and the sleeve is welded with a φ6 wire loop, and the welded part of the wire loop is covered with a heat shrink tubing.

[0013] Preferably, the terminal block of the tuner housing is made of flame-retardant material, and the surface of the tuner housing is coated with a smooth coating.

[0014] Preferably, the display screen is used to display inductance, capacitance, current, resistance, and voltage.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] The tuner housing of this utility model is made of FV-2 flame-retardant material with insulation class F and high temperature resistance class F, effectively preventing fire risk. The surface of the housing is treated with chromate passivation zinc plating to form an anti-oxidation colored film, which enhances corrosion resistance. It uses a 20μF / 1000V capacitor with a high saturation current inductor (≥3A) to meet the needs of high current applications, improve energy transmission efficiency, and improve the safety of the tuner. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the overall front structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the overall side structure of this utility model.

[0020] Figure 4 This is a top-view schematic diagram of the overall structure of this utility model.

[0021] Figure 5 This is a schematic diagram of the 50Hz resonant impedance test circuit of this utility model.

[0022] Figure 6 This is a schematic diagram of the impedance testing circuit for inductor L2 of this utility model.

[0023] In the diagram: 100, tuner housing; 200, capacitor; 300, choke assembly; 400, display screen. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides, for example Figure 1-6The choke tuner with isolation circuit shown includes a tuner housing 100, a capacitor 200, a choke coil assembly 300, and a display screen 400. The terminal block of the tuner housing 100 is made of flame-retardant material with a flame retardant rating of FV-2, an insulation rating of F, and a high temperature resistance rating of F. The middle part of the tuner housing 100 is made of metal, and the surface of the tuner housing 100 is plated with a smooth coating, which makes the surface of the tuner housing 100 smooth and free of spots and protrusions. The surface of the zinc-plated parts of the tuner housing 100, which is passivated by chromate, has a bright colored film ranging from green to golden yellow. The thermoplastic parts such as knobs on the tuner housing 100 are free from defects such as deformation and cracks or other mechanical damage. The tuner housing 100 is firmly assembled with bolts and has a stable structure.

[0026] The external dimensions of the tuner housing 100 are shown in the table below:

[0027]

[0028] Capacitor 200 is installed inside the tuner housing 100. The electrical specifications of capacitor 200 are 20uF / 1000V. Choke assembly 300 is located on one side of capacitor 200 and installed inside the tuner housing 100. Display screen 400 is fixedly embedded on the upper surface of tuner housing 100. Display screen 400 is used to display inductance, capacitance, current, resistance, and voltage for easy debugging and maintenance. The corners of tuner housing 100 are chamfered. Capacitor 200 forms an LC resonant circuit through inductance. The electrical specifications of the choke tuner with isolation circuit, composed of tuner housing 100, capacitor 200, choke assembly 300, and display screen 400, are shown in the table below.

[0029]

[0030]

[0031] The inductor uses its own lead wire to reduce contact resistance and improve conductivity reliability. There is a margin between the capacitor lead of capacitor 200 and the terminal block of the inductor and tuner housing 100. The lead wire must not be subjected to force. The inductor uses its own lead wire to form a loop for connection to capacitor 200. The lead wire of capacitor 200 is sleeved with a sheath, and a φ6 wire loop is welded to the sheath. Heat shrink tubing is used to protect the wire loop area. The capacitor lead wire is protected by a sheath and heat shrink tubing to prevent breakage under stress and ensure long-term stability. The choke tuner with isolation circuit operates at ambient temperatures of 15℃~35℃. Under test conditions of ℃ and relative humidity of 25% to 75%, the insulation resistance between each terminal of the tuner and ground (fixed screw) should be no less than 1000MΩ when tested with a 500V megohmmeter to ensure high insulation performance. At an atmospheric pressure of no less than 89.8kPa, the tuner should be able to withstand a withstand voltage test of 50Hz AC sine wave with an effective voltage of 2000V for 1 minute without breakdown or surface flashover, thus meeting the requirements for high-voltage applications. A small capacitor is connected in parallel to the tuner terminals to meet the frequency shift impedance requirements of the choke transformer. The capacitance values ​​of the small capacitor at different frequencies are as follows.

[0032] Adapter frequency Capacitor value Remark 1700 / 2000Hz 22.5nf±3% 2300 / 2600Hz 15nf±3%

[0033] The circuit diagram for the tuner in the 50Hz resonant impedance test is as follows: Figure 5 As shown, V1, V2, V3—digital true RMS meters, grade 0.5; A—AC ammeter, grade 0.5; T—voltage regulator, 250V, 500VA; L1, C1—inductor and capacitor. The testing method, taking TE1 as an example, is as follows:

[0034] Adjust the voltage regulator T so that the ammeter A value I is 3A; record the values ​​of V1, V2, and V3, and calculate Q > 20 using the formula Q = U / U1 (U is the minimum value among V2 and V3);

[0035] The resonant impedance Z = U1 / I, and the calculated resonant impedance Z ≤ 7Ω.

[0036] The circuit diagram for the tuner in the inductor L2 impedance test is as follows: Figure 6 As shown, the test method is as follows: Adjust the voltage regulator T so that the value of AC ammeter A is 0.2A, record the value of voltage V, and calculate according to the formula Z=U / I, Z≥157Ω.

[0037] The method for checking the C2 capacitance value of the tuner is as follows: Use an RCL tester to test the connection between terminal 6 and terminal I3, with a test voltage of 1V and a frequency of 1kHz. The C2 capacitance value should meet the following requirements: 0.95μf≤C2≤1.05μf.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A choke tuner with isolation circuitry, characterized in that, include: Tuner housing (100); A capacitor (200) is mounted in the cavity of the tuner housing (100); Choke assembly (300), the choke assembly (300) is disposed on one side of capacitor (200), the choke assembly (300) is installed in the inner cavity of tuner housing (100); The display screen (400) is fixedly embedded in the upper surface of the tuner housing (100).

2. A choke tuner with isolation circuit according to claim 1, characterized in that, The corners of the tuner housing (100) are chamfered. The electrical specifications of the capacitor (200) are 20uF / 1000V. The capacitor (200) forms an LC resonant circuit through an inductor.

3. A choke tuner with isolation circuit according to claim 2, characterized in that, The inductor is led out using this line, and there is a margin between the capacitor lead of the capacitor (200) and the terminal block of the inductor and tuner housing (100).

4. A choke tuner with isolation circuit according to claim 2, characterized in that, The inductor is connected to the capacitor (200) by making a loop with the wire. The lead wire of the capacitor (200) is sleeved with a sleeve, and the sleeve is welded with a φ6 wire loop. The welded part of the wire loop is covered with a heat shrink tubing.

5. A choke tuner with isolation circuit according to claim 1, characterized in that, The terminal block of the tuner housing (100) is made of flame-retardant material, and the surface of the tuner housing (100) is coated with a smooth coating.

6. A choke tuner with isolation circuit according to claim 1, characterized in that, The display screen (400) is used to display inductance, capacitance, current, resistance and voltage.

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