High-voltage rectification module of radio frequency dryer

Abstract

The utility model discloses a high-voltage rectifier module of a radio frequency dryer, which comprises an inductor and a rectifier diode, a corrugated resistor is arranged on the left side of the inductor, a copper radiating fin is arranged at the bottom of the corrugated resistor of the rectifier diode, the rectifier diode is arranged in the copper radiating fin of the rectifier diode, and a glass fiber laminated board is arranged at the bottom of the rectifier diode. The right side of the rectifier diode inductor is provided with a piezoresistor, and the bottom of the rectifier diode piezoresistor is provided with a high-voltage capacitor. The high-voltage rectifier module of the radio frequency dryer is stable in output direct current voltage and current and low in failure rate, and the modularized rectifier strips are convenient to install and replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of radio frequency drying, and particularly relates to a high-voltage rectification module for a radio frequency dryer. Background Art

[0002] In the operation of a radio frequency dryer, a direct current voltage of 11 - 12 KV needs to be applied to the anode when the electron tube generating radio frequency waves is working. This requires a high-power rectification module that rectifies the 50 Hz power supply output by the power step-up transformer into direct current. Ordinary rectifier diodes cannot withstand such high voltages and are prone to breakdown and damage. Therefore, we need a new type of high-voltage rectification module for radio frequency dryers to solve the above problems and meet people's needs. Content of the Utility Model

[0003] The purpose of the utility model is to provide a high-voltage rectification module for a radio frequency dryer to solve the problem of the need for high-voltage direct current power supply when a radio frequency electron tube is working.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A high-voltage rectification module for a radio frequency dryer, including

[0005] an inductor, a corrugated resistor is arranged on the left side of the inductor, a copper heat sink is arranged at the bottom of the corrugated resistor, a rectifier diode is arranged inside the copper heat sink, a fiberglass laminate is arranged at the bottom of the rectifier diode, a varistor is arranged on the right side of the inductor, and a high-voltage capacitor is arranged at the bottom of the varistor.

[0006] Preferably, the thickness of the fiberglass laminate is 4 mm.

[0007] Preferably, 16 rectifier diodes are installed on the fiberglass laminate.

[0008] Preferably, the copper heat sink is concave.

[0009] Preferably, high-voltage capacitors are connected in parallel at both ends of the rectifier diode.

[0010] Preferably, the inductor is a hollow inductor coil wound with φ2 mm enameled wire.

[0011] The technical effects and advantages of the utility model: The direct current voltage and current output by the high-voltage rectification module for the radio frequency dryer are stable, the failure rate is low, and the modular rectification strips are convenient to install and replace. Description of the Drawings

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] In the figure: 1 - Inductor, 2 - Corrugated resistor, 3 - Copper heat sink, 4 - Rectifier diode, 5 - Fiberglass laminate, 6 - Varistor, 7 - High - voltage capacitor. Detailed implementation

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0015] The present invention provides a high - voltage rectification module for a radio - frequency dryer as shown in Figure 1 which includes

[0016] An inductor 1, with a corrugated resistor 2 provided on the left side of the inductor 1, a copper heat sink 3 provided at the bottom of the corrugated resistor 2, a rectifier diode 4 provided inside the copper heat sink 3, a fiberglass laminate 5 provided at the bottom of the rectifier diode 4, a varistor 6 provided on the right side of the inductor 1, and a high - voltage capacitor 7 provided at the bottom of the varistor 6.

[0017] Specifically, the thickness of the fiberglass laminate 5 is 4 mm.

[0018] Specifically, 16 rectifier diodes 4 are installed on the fiberglass laminate 5.

[0019] Specifically, the copper heat sink 3 is concave.

[0020] Specifically, a high - voltage capacitor is connected in parallel at both ends of the rectifier diode 4.

[0021] Specifically, the inductor is a hollow inductor coil wound with φ2 mm enameled wire.

[0022] Working principle: During the use of this high - voltage rectification module for a radio - frequency dryer, this high - voltage rectification module adopts an independent six - group rectifier diode 4 to form a three - phase full - bridge rectification method. Each group of rectifier diodes 4 is composed of 16 high - voltage rectifier diodes 4 (ZP20) connected in series, and a high - voltage capacitor (33 pf) is connected in parallel on each rectifier diode 4 for voltage equalization protection. A group of 16 varistors 6 (Z21D102) connected in series is connected between the output terminal after rectification and the ground as output over - voltage protection. Then, an inductor coil and two varistors 6 are connected in series at the output terminal, playing a role in smoothing the output current and limiting the current.

[0023] The three-phase 380V 50Hz power supply provided by the power boost transformer is input into a three-phase full-bridge rectifier circuit composed of 6 groups of rectifier bars. Each group of rectifier bars uses a 4mm-thick fiberglass laminate 5 as the base plate. 16 rectifier diodes (ZP20 with a breakdown voltage of 1800V and a current of 20A) are installed in series on each base plate. A concave copper heat sink 3 is installed for each rectifier diode 4 to ensure heat dissipation. A high-voltage capacitor 7 (33pf with a breakdown voltage of 3KV) is connected in parallel at both ends of each rectifier diode 4 to play a voltage equalizing role and prevent the diode from being broken down due to uneven voltage distribution.

[0024] After the power supply is rectified by the three-phase full-bridge rectifier and output, a group of varistors 6 is connected to the ground as overvoltage protection for the output. This group of varistors 6 is composed of 16 varistors (Z21D102) connected in series. The breakdown voltage of each varistor is 1KV. When the output voltage exceeds 16KV, it conducts to the ground and short-circuits to protect the electronic components behind. Then, a hollow inductor 1 coil (10mh) wound with φ2mm enameled wire and two parallel ripple resistors (5Ω 370W) are connected in series, which play a role in smoothing the output current and limiting the current, and ensure the stability of the output voltage and current.

[0025] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high voltage rectifier module for a radio frequency dryer, characterized in that: include An inductor (1), wherein a corrugated resistor (2) is arranged on the left side of the inductor (1), a copper heat sink (3) is arranged at the bottom of the corrugated resistor (2), a rectifier diode (4) is arranged inside the copper heat sink (3), a glass fiber laminate (5) is arranged at the bottom of the rectifier diode (4), a varistor (6) is arranged on the right side of the inductor (1), and a high-voltage capacitor (7) is arranged at the bottom of the varistor (6).

2. The high voltage rectifier module of a radio frequency dryer according to claim 1, characterized in that: The glass fiber laminate (5) has a thickness of 4 mm.

3. The high voltage rectifier module of a radio frequency dryer according to claim 1, characterized in that: Sixteen rectifier diodes (4) are mounted on the glass fiber laminate (5).

4. The high voltage rectifier module of a radio frequency dryer according to claim 1, characterized in that: The copper heat sink (3) is concave.

5. The high voltage rectifier module of a radio frequency dryer according to claim 1, characterized in that: A high-voltage capacitor is connected in parallel to both ends of the rectifier diode (4).

6. The high voltage rectifier module of a radio frequency dryer according to claim 1, characterized in that: The inductor (1) is a hollow inductor coil wound with φ2 mm enameled wire.

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