Single-phase and 3-phase AC squirrel cage induction motors need some type of control circuit to initiate a start or stop function. The two types of ladder control circuits commonly used are the 2-wire ...

A previous Design Idea (Reference 1)describes a three-IC control circuit for testing the power sequencing of an SOC (system on chip). Although that circuit lets you control the power-on sequence of ...

In Part 1 of this two-part series, we presented a 3-phase, 480VAC motor circuit with its associated controls (Figure). We stepped through a logical, systematic approach to troubleshoot the main power ...