Seventy amp mixed current control unit

The City of Johannesburg in South Africa has a challenge of moving bulk components (solids) all around the mines, making life easier for the separation of waste products and good products. This paper covers the basic component unit called a Mixed Current Vibration Feeder (MCVF) and discusses the controller used to run such feeders depending on the type of feeder used. Most feeders are used in mines and vary in size (rating) according to the maximum current the feeder can draw. Therefore, this paper seeks to look at a feeder as a whole and a way of controlling its speed depending on the amount of load to be moved at that particular time. Further, it determines if the very same controller would be durable for other types of load (material). In this paper, the design of the feeder controller is presented, calculations made, built, tested and validated.