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L0504-Murata muRata common mode inductor 90Ω 150mA
The method of identifying the three poles of the thyristor module is very simple. According to the principle of the PN junction, it is only necessary to measure the resistance value between the three poles with a multimeter. Many customers have many problems in identifying the three poles of thyristor modules due to the lack of relevant knowledge in this area. The following details:
The forward and reverse resistance between the anode and the cathode is several hundred kilohms or more, and the forward and reverse resistance between the anode and the gate is several hundred kiloohms or more (there are two PN junctions between them, and the direction On the contrary, therefore, the anode and the control pole do not pass in the forward and reverse directions).
There is a PN junction between the gate and the cathode, so its forward resistance is in the range of a few ohms to several hundred ohms, and the reverse resistance is larger than the forward resistance. However, the characteristics of the gate diode are not ideal. The reverse direction is not completely blocked. A relatively large current can pass. Therefore, sometimes the measured reverse resistance of the control electrode is relatively small, and the control characteristics are not good. . In addition, when measuring the positive and negative resistance of the control pole, the multimeter should be placed in the R*10 or R*1 gear to prevent the voltage from being too high and the reverse polarity of the control pole.
If the positive and negative poles of the component are short-circuited, or the anode is short-circuited with the control pole, or the control pole is short-circuited with the cathode, or the control pole is disconnected from the cathode, the component is damaged.
Like other semiconductor devices, thyristor modules have the advantages of small size, high efficiency, good stability, and reliable operation. Its emergence has made semiconductor technology enter the field of strong electricity from the field of weak electricity, and has become a component used in industry, agriculture, transportation, military research, commercial and civil appliances.
Intelligent thyristor modules are widely used in various industries, such as electrolysis, electroplating, temperature regulation, dimming, electric welding, battery charging and discharging, DC motor speed regulation, AC motor soft start, regulated power supply, excitation and so on. According to the information provided by the relevant units, the intelligent thyristor module has the following characteristics:
1. Adopt imported glass passivation chip, the module has small conduction voltage drop, low power consumption and remarkable energy saving effect.
2. The control trigger circuit is assembled with imported patch components, and all components are subjected to high temperature aging screening with high reliability.
3, using ceramic copper-clad process, unique welding process, high insulation strength, good thermal conductivity, large current carrying capacity, thermal cycle load times is 10 times the national standard.
4. Control the trigger circuit, the main circuit and the heat-conducting bottom plate are insulated from each other. The dielectric strength ≥ 2500VAC heat-conducting bottom plate is not charged, safe and reliable.
5. The control port inputs 0-10V DC signal, which can smoothly adjust the output of the main circuit.
6, the control mode can be: manual potentiometer control; instrument control; microcomputer control; plc control.
7. Suitable for resistive or inductive loads.
Among them, the anti-aging design is a remarkable feature of the intelligent thyristor module, which is favored by all major units.
The thyristor module is a new type of module that encapsulates the main circuit of the thyristor with the phase shift trigger circuit and the circuit with control function in the same casing. The module is actually a quasi-power electronic device, which has great advantages in terms of volume, capacity, function, intelligence and reliability, and is particularly convenient to install and use. The application scope of the thyristor module mainly includes:
A relatively complete thyristor module is generally composed of a power thyristor, a phase shifting trigger, a software controlled single chip microcomputer, a current, a voltage, a temperature sensor, and an operating keyboard, LED or LCD display. Mainly used in solid state contactors, relays, industrial electrothermal temperature control, precision control of various semi-body special equipment, medium and high frequency heat treatment power supply, electric welding equipment (rectifier welding machine, secondary rectification welding machine, inverter welding machine) Laser power supply, excitation power supply, electroplating, electrolysis power supply, mechanical and electronic equipment power supply, urban trackless, electric traction, port ship cargo lift, fan, water pump, rail machine, gantry planer, large crane drive, ultra low frequency steel, stirring power, paper, Textile. Urban water supply, sewage treatment, etc., can be said to have an electrical control thyristor module in the distribution system.
Small size, complete functions, simple connection, convenient control, stable and reliable performance are the characteristics of thyristor modules, while increasing capacity, expanding functions and reducing costs, serialization is the future development trend of thyristor modules.
