1results about How to "Normal control" patented technology

This utility model relates to the field of variable frequency speed control devices, and discloses a general-purpose dual-power dual-frequency variable frequency speed control device for machines. It includes a sled and an explosion-proof housing mounted on the sled. The explosion-proof housing includes a partition, a left main cavity, a right main cavity, a first load wiring cavity, a second load wiring cavity, a first control wiring cavity, a second control control wiring cavity, an intrinsically safe cavity, and a second intrinsically safe cavity. The left and right main cavities are respectively located on the left and right sides within the explosion-proof housing. The partition is located between the left and right main cavities. The first and second load wiring cavities are respectively located above the opposite side of the left and right main cavities. In this utility model, when the dedicated power supply line fails or is interrupted, the backup power supply line operates through the dual-power controller. At this time, the dual-fan controller switches to operate the backup fan. When the dedicated power supply line returns to normal operation, the dual-power controller switches to operate the dedicated power supply line, and the dual-fan controller switches to operate the main fan.