Conquering inductive-load demons

摘要

One of the most frustrating challenges for control engineers and specialists is the potential early failure of interposing or interfacing relays used to drive inductive loads. This is especially true of general-purpose "ice cube" and increasingly popular pluggable compact relays, even when the relays appear to be sufficiently oversized to power low-amperage loads such as small motors, dc solenoids, and contactor coils.