Synchro And Resolver Engineering Handbook Moog Inc Jun 2026

The full text is often available through technical repositories and official Moog Literature portals. It is frequently cited alongside other industry standards, such as the Analog Devices handbook on synchro conversion.

The Synchro and Resolver Engineering Handbook distributed by Moog Inc. (often available via their Parts and Repairs division or legacy literature archives) is not a sales brochure. It is a rigorous technical text. Typically structured in five major sections, here is what an engineer will find: Synchro And Resolver Engineering Handbook Moog Inc

The answer lies in edge cases. When a resolver cable runs 50 meters through a factory with VFDs spewing common-mode noise, the handbook’s sections on “Shield Termination” and “Twisted-Pair Routing” become priceless. When a resolver’s output voltage sags because the excitation frequency drifted due to a cheap oscillator, the handbook’s graphs of “Output vs. Frequency” show you exactly how much error to expect. When you need to build a redundancy management system—three resolvers on one shaft, voting on position—the handbook’s discussion of “dual-speed resolvers” and “electrical zero alignment” is the only guide you’ll find. The full text is often available through technical

The opening chapters do not assume the reader is an expert. They meticulously derive the voltage equations governing the devices. The handbook details the concept of the "Synchro Torque Gradient," a critical parameter defined by Moog that determines how much torque a receiver can exert. This section is vital for engineers sizing systems; selecting a synchro with too low a torque gradient results in sluggish response, while one too high introduces oscillation and instability. (often available via their Parts and Repairs division

To understand the handbook, one must first understand the components at its heart. A synchro is, in essence, a rotary transformer. It looks like a small, precision motor but behaves like an analog computer. When you rotate its rotor, it outputs a set of three voltages (or receives them) that encode the exact angular position of a shaft. No glass disks, no LEDs, no fragile optics—just copper windings and a magnetic field.

Electric vehicles (EVs) use resolvers for permanent magnet motor control. Wind turbines use resolvers for pitch control. Surgical robots use resolvers for force feedback.