Slab resolvers: an explanation

摘要

In this article, Mark Howard from Zettlex explains what slab resolvers are, how they work and where to use them, and discusses alternative approaches. What is a slab resolver? Let's deal with the jargon first: a resolver is an electrical transformer used to measure angle of rotation. Most resolvers look a bit like an electric motor - with copper windings on the stator and a machined metal rotor. The inductive coupling between the transformer's windings varies according to angle. So, if we energise the resolver with an AC signal and measure the output from the transformer's windings, we get an AC electrical signal whose amplitude is proportional to angle.