Decoders

Resolvers are essentially a rotary transformer, having one rotor winding and two stator windings.  The stator windings are located 90 degrees apart.  Either rotor or stator winding can be used as primary.  Typically, the rotor windings is driven by a reference voltage at a frequency ranging from 400 Hz to several KHz.

Resolver Decoders decode the analogue outputs from a resolver into a digital format to feed into a PLC or other controllers. Autotech uses a highly "noise immune" ratio-metric decoding technique in all decoder products. A wide range of decoders are available with various features such as zero offset capability, flexible resolution or counts per turn, choice of output types (TTL, sinking or sourcing) output format, (BDC, binary grey code) and single or multi-turn models. Autotech also offers plug-in decoders for AB 1771 I/O rack, IBM PC, Modicon 984, Quantum TSX and GE.