Selection of Grain conveyor power devices

    1 heat problem

    Cooling grain conveyor power devices probably accounted for the entire amount of heat inverter in general, it has a Belt conveyor direct impact on the life of the drive , thereby

affecting the life of the conveyor length .

    2 . Electromagnetic Compatibility

    The main drive control circuit and the main circuit composed of two parts , the main non-linear switching circuit , the inverter itself so that the harmonic interference.

The control circuit of belt conveyor design the inverter is a weak signal , small energy circuit , so the drive can not be vulnerable to interference caused workers

Made . Therefore , to solve the interference problem of electromagnetic compatibility is a key technology explosion proof inverter working properly .

    3 Selection issues of power devices

    1140v is unique to China's coal industry, a voltage level , while not currently on the market for constant torque load start and speed control 400kw/1140v mine explosion-

proof inverter products. Therefore, the selection of the power device drive is also an important research work

.

    4 . Proof housing design

    Explosion-proof enclosure is designed to take into account the heat , explosion-proof structure, and electromagnetic compatibility and other technical requirements.