Machine Design

Dc-motor controllers

Three standard controllers handle three-phase, brushless dc motors. The motor controllers come in 5, 10, and 20 A and are operational from 11 to 52 Vdc. Protection features include overtemperature sensing, cycle-by-cycle current limiting, and current-limit shutdown. The controllers have 60 or 120° selectable electrical spacing, tach output, and a forward/reverse selectable. Speed control input is set through a potentiometer or 0 to 5-Vdc analog input. The 20-A version has an added braking function.

Ametek Rotron, 627 Lake St., Kent, OH 44240, (330) 673-3452. Hall 12; Stand E35

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