LC resonant circuit reactor

Abstract

The utility model provides an LC resonance circuit reactor which comprises a coil, an iron chip, a gasket, a fixing screw and an insulating sleeve, and the coil, the iron chip, the gasket, the fixing screw and the insulating sleeve are assembled to form the reactor with a magnetic circuit gap and an inductance value capable of being slightly adjusted. The method is suitable for parameter voltage stabilizers of various models, and is used for filtering harmonic components of output voltage and reducing waveform distortion.

Description

TECHNICAL FIELD

[0001] The utility model discloses LC resonant circuit reactor, be exclusively used for AC parameter stabilizer. BACKGROUND

[0002] The prototype of AC parameter stabilizer is constant voltage (transformer) stabilizer CVT. The constant voltage stabilizer has low stabilization precision, and the output voltage waveform is nearly trapezoidal with cut top and cut bottom, so that the harmonic content is large, which can easily cause the load to heat and burn out, especially causing great harm to motors and transformers. SUMMARY

[0003] The utility model mainly aims at: reducing the harmonic component of the output voltage of the stabilizer, improving the stabilization precision of the stabilizer, reducing the harmonic component of the output voltage, and improving the voltage waveform. According to Fourier series theory analysis, the harmonic is mainly odd, and the higher the number is, the smaller the proportion is, so the filter circuit is mainly aimed at low-frequency odd harmonic, and odd resonant circuits such as 3 times and 5 times can be set to remove the harmonic.

[0004] The technical scheme of the utility model is: LC resonant circuit reactor, including E type iron core piece, I type iron core piece, iron core fragment and epoxy plate gasket composition, finally fixed with double-end screw with glass fiber sleeve, the magnetic circuit gap composed of epoxy plate gasket in the LC resonant circuit reactor, prevents the core from being saturated, so that the LC resonant circuit reactor can pass through low-frequency large-current alternating current, in the LC resonant circuit reactor, the E type iron core piece, the I type iron core piece and the iron core fragment are formed by multi-layer superposition, wherein the E type iron core piece and the iron core fragment reserve a certain magnetic circuit gap, and are transversely installed in the magnetic circuit gap by epoxy plate gasket; in the LC resonant circuit reactor, all are fixed by screw with glass fiber sleeve.

[0005] The utility model has the advantages of: 1. reducing the harmonic component of the output voltage of the parameter stabilizer, reducing the harm of the harmonic to the load; 2. reducing the distortion of the output voltage waveform, improving the output voltage waveform; 3. improving the output precision of the parameter stabilizer; 4. the LC resonant circuit reactor of the utility model has simple structure, easy processing, strong universality and strong practicability. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 It is the E type iron core piece, I type iron core piece, iron core fragment and magnetic circuit gap structure schematic diagram in the utility model LC resonant circuit reactor.

[0007] Figure 2 It is the side schematic diagram of the utility model LC resonant circuit reactor.

[0008] Figure 3 It is the front schematic diagram of the utility model LC resonant circuit reactor.

[0009] Figure 4 The utility model discloses LC resonance circuit reactor's epoxy board gasket, stud, nut and glass fibre sleeve.

[0010] In the drawing, 1 - magnetic circuit gap, 2 - epoxy board gasket, 3 - glass fibre sleeve, 4 - stud, 5 - nut, 6 - E type core piece, 7 - core fragment, 8 - I type core piece, 9 - reactor coil wire head. DETAILED DESCRIPTION

[0011] The specific embodiment of the utility model is further explained below in combination with the drawings:

[0012] 1, as shown in the utility model LC resonance circuit reactor, E type core piece 6 and core fragment 7 between the magnetic circuit gap 1 is equipped with. Figure 1

[0013] 2, as shown in the utility model, the magnetic circuit gap is separated by epoxy board gasket 2, and the thickness of epoxy board gasket 2 is represented by delta, which is to prevent core saturation. The method is: according to the shape and size of the core column section, the gasket is made of epoxy board, the gasket thickness delta is equal to the magnetic circuit gap, the core column length is appropriately cut by delta / 2, and the epoxy board gasket is transversely installed in the middle of the core column when the core is installed. Figure 2 Figure 3 3, as shown in the utility model, in order to overcome the influence of production process on inductance, a certain number of turns is added when winding the reactor coil, and a plurality of wire heads are reserved for selection during debugging.

[0014] 4, as shown in the utility model, in order to reduce core eddy current loss, glass fibre sleeve needs to be provided on the screw sleeve for fixing the core piece. Figure 2 5, according to the utility model, L and C are set by calculation, f is the resonance frequency, L is the reactor inductance, and C is the capacitor capacity. The reactor inductance of small power stabilizer can be larger, and the capacitor capacity can be smaller. The resonance current of large power stabilizer is larger, the reactor inductance is smaller, and the capacitor capacity is larger. Generally, setting 3 times and 5 times two section filter circuits is enough. The output voltage harmonic component is less, and 7 times and 9 times filter circuits can be increased.

[0015] Figure 2 Figure 3

[0016]

[0017] ​​​​​​​6、Most of LC resonant circuit is used in high frequency small power circuit, LC resonant circuit in parameter stabilizer works in low frequency, high power state, has special requirement to electric reactance. Although electric reactance in direct current filter circuit also works in high current state, but its function in it is passing direct current, blocking alternating current, and electric reactance in parameter stabilizer requires passing low frequency high current alternating current, the key is that it cannot enter saturation state when working, cannot affect and change output voltage waveform.

[0018] 7、The finished filter circuit is connected to the output circuit, and the main transformer is debugged as a whole.

[0019] Note: The frequency selection characteristic of LC resonant circuit is determined by Q value, The greater the Q value, the better the frequency selection characteristic, but in high power LC resonant circuit, due to the large resonant current, the inductance of electric reactance cannot be too large. Therefore, even if the same LC resonant filter circuit is used, the output voltage harmonic component of high power stabilizer is more than that of small power stabilizer, and the waveform distortion is larger.

Claims

1. LC resonant circuit reactor, comprising E-type core piece, I-type core piece, core fragment and epoxy plate gasket, finally fixed by double-end screw with glass fiber sleeve, characterized in that: The magnetic gap of the epoxy plate gasket in the LC resonant circuit reactor prevents the core from saturation, so that the LC resonant circuit reactor can pass through low-frequency large-current alternating current; in the LC resonant circuit reactor, the E-shaped core piece and the core fragment retain a certain magnetic gap, and are transversely installed in the magnetic gap by the epoxy plate gasket.

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