rotary kiln main drive since the DC motor starting torque, speed performance <a href="
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2 rotary kilns principle of selection has the following characteristics, namely: a rotary kiln at the start, because of their own and thermal reasons, the required starting torque is large, corresponding high starting current, but not high current during normal operation. Rotary kiln when to stop, there is the phenomenon back to the kiln. In an instant stop the kiln, kiln shell reversed due to inertia, kiln speed reducer side is transmitted from the motor, the armature is fast, and instantly make the motor run power state, if the exciting current constant, high anti-electric potential, in exchange surface to form burn marks, even commutator will hit the pits, affecting the service life of the commutato <a href="
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For these reasons, direct drive rotary kiln, the choice of DC converter, and a control program for components and DC drive DC motor means are required. 2.1 Motor selection based on the characteristics of the cement kiln, each DC motor manufacturers generally have dedicated kiln model, and, usually due to a host of kiln rated speed is not high, if the motor comes with fan cooling effect is not good, usually retrofit forced cooling fan to enhance cooling. DC converter rectifier elements 2.2 Selection of basic DC converter using thyristors, SCR itself due to poor flow capacity, the selection should be considered a sufficient margin.