Industrial explosion-proof inverter physical working environment

Explosion-proof inverter is also called motor frequency conversion speed control box - its function can be adjusted by changing its output frequency to adjust the speed of ordinary three-phase asynchronous motor, in order to achieve the requirements of the production process, or to achieve the purpose of saving electricity, energy saving rate of up to 30% -60%, can also be used as a motor soft start controller, but also through the sensor, transmitter and other control circuits form a closed-loop speed control system. Easy installation and operation, starting balance without impact current (soft start), power supply capacity is greatly reduced, power factor is constant, and has various functions such as fault display. Since the core device of the speed-variable frequency converter is a single-chip microcomputer, it has a very strong function.

There are four major instructions for the physical environment of explosion-proof inverters

1. Explosion-proof inverter operating temperature The inverter is a high-power electronic component, which is easily affected by the working temperature. The general requirement of the product is 0-55°C. However, in order to ensure the safety and reliability of the work, consideration should be given to leaving room for use. The best control is below 40°C. 2. Corrosive gas use environment If the corrosive gas concentration is large, it will not only corrode the leads of the components, printed circuit boards, etc., but it will also accelerate the aging of plastic devices and reduce the insulation performance. In this case, the control box should be made into a closed structure and be ventilated.

3. Ambient temperature When the temperature is too high and the temperature changes greatly, the inside of the inverter is prone to dew condensation, and the insulation performance will be greatly reduced, and even a short circuit accident may occur. If necessary, desiccants and heaters must be added to the tank.

4. Vibration and shock When the control cabinet with the inverter is subjected to mechanical vibration and shock, it will cause poor electrical contact. At this time, besides increasing the mechanical strength of the control cabinet, and keeping away from the vibration source and impact source, it should be fixed with a seismic rubber pad. Control the vibration components such as external and internal electromagnetic switches; after the equipment is operated for a period of time, it shall be inspected and maintained.

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