Introduction to the Characteristics of Contactless Contactors
Patent number: ZL.3
1: Imported bidirectional thyristor is used, with sufficient power margin, thoroughly encapsulated with high-quality epoxy resin, unaffected by environmental factors, integrated heat sink, good heat dissipation, stable and long service life, and strong overload capacity, not easily damaged.
2: The circuit design fully considers precise positioning, with a speed of up to 60 on-off cycles per minute for accurate positioning, while also handling the impact of rapid on-off cycles on the motor.
3: Suitable for harsh environments, frequent start-up, and precise positioning, with a wide voltage range of 98-280V AC (covering 110V, 220V) and 3.2V-32V DC (covering 5V, 24V)
4: The installation of iron card gauges can increase heat dissipation and ensure grounding safety. It is easy to install, reliable, and not easily damaged. It can be used on a large scale without increasing the volume of the control cabinet, making it suitable for large-scale promotion.
In the development of automation control, the transition from iron core contactors to solid-state relays has taken a step forward. However, the quality of solid-state relays in the current market varies greatly (due to price competition). At the same time, due to the troublesome installation, poor heat dissipation, large control cabinet space occupation, and difficult replacement of solid-state relays, the development of solid-state relays in the field of automation control is limited. Contactless contactors are a comprehensive product of the first two, absorbing the advantages of iron core installation and replacement, as well as the advantages of solid-state relays, and making corresponding improvements. At present, the application of automation control is becoming increasingly widespread, and the ones with high failure rates are contactors and intermediate relays. If a DC contactless contactor (T44D-15-3P voltage 3.2-32vVDC) is selected, intermediate relays are no longer needed, and the PLC directly outputs to the contactless contactor (the driving current of the DC contactless contactor is very small, tens of milliamps). This has the following advantages:
1: Eliminating the intermediate relay not only reduces costs, but also eliminates the fault point of the intermediate relay. At the same time, it simplifies the wiring and space inside the cabinet, and eliminates faults caused by loose wire ends, aging or damaged intermediate relay bases, or poor contact of intermediate relay contacts (which are difficult to find), greatly improving the reliability of the equipment.
2: The control circuits are all safe voltage, easy to operate and less prone to safety accidents,
3: Due to the reduction of driving current, the service life of PLC output points is greatly increased, while also saving energy. Output modules with transistor outputs can be used to further improve control speed without worrying about misconnecting wires.
4: It can make the control cabinet smaller and save the use of non-ferrous metals (iron core, copper, silver), which should be considered as energy-saving products! If widely promoted and used, the amount of electricity and non-ferrous metals saved each year is quite considerable!