Synchros are typically used to feedback angular position of rotating equipment. A synchro is essentially a transformer whose primary-to-secondary coupling may be varied by physically changing the relative orientation of the two windings. While a synchro and a resolver are electrically very similar to a transformer, they are mechanically more like a motor. The primary winding in a synchro or a resolver can be physically rotated with respect to the secondary windings. A synchro is excited by an AC reference voltage applied to its rotor winding. I can tell you about synchronous resolvers because I was trained on them in my apprenticeship. A synchronous-resolver is probably what you.


Author: Tod Ebert V
Country: Poland
Language: English
Genre: Education
Published: 10 February 2017
Pages: 349
PDF File Size: 42.32 Mb
ePub File Size: 5.39 Mb
ISBN: 147-6-28506-669-2
Downloads: 5095
Price: Free
Uploader: Tod Ebert V


Synchro has 3-phases output.

Resolvers/Synchros | TAMAGAWA SEIKI CO.,LTD.

However, 2 phases structure of resolver is syncros resolvers for angle detecting sensor, like Synchro. The application is Hybrid Car and so on.

About synchros The principles of Synchro are similar to those of an electrical transformer. A shaft of the receiver rotates in unison with the rotation of syncros resolvers shaft of the transmitter.


A synchronous-resolver is probably what you refer to as a "synchro" and like you say, it has three windings on the stator and also a rotor winding brought syncros resolvers on slip rings.

They are just like a synchronous motor or generator used in industry but syncros resolvers smaller. Conversely, this type of system will demonstrate errors in all other situations, and the magnitude of these errors must be controlled through optimized tuning of the converter.

The frequency response of the converter syncros resolvers play an syncros resolvers part in the overall loop stabilization. This difference is then used to modify the guess, and this is fed back to close the loop. There will be errors during acceleration, but one is not normally trying to control this variable anyway.


In a syncros resolvers picture interlock system, a large motor-driven distributor can drive as many as 20 machines, sound dubbers, footage counters, and projectors. Synchros designed for terrestrial use tend to be driven at 50 or syncros resolvers hertz the mains frequency in most countrieswhile those for marine or aeronautical use tend to operate at hertz the frequency of the on-board electrical generator driven by the engines.

Synchro Overview

Single phase units have five wires: These three are bussed to the other synchros in the system, and provide the power and information to align the shafts of all the receivers.

Synchro transmitters and receivers must be powered by the same branch circuit, so to speak; the mains excitation voltage sources must match in syncros resolvers and phase. Syncros resolvers safest approach is to bus the five or six lines from transmitters and receivers at a common point.

Different makes of selsyns, used in interlock systems, have different output voltages. In all cases, three-phase systems will handle more power and operate a bit more smoothly. Many synchros operate on 30 to 60 V AC also. Synchro transmitters are as described, but 50 and Hz synchro receivers require rotary dampers to keep their shafts from oscillating when not loaded as with dials or lightly loaded in high-accuracy applications.

A different type of receiver, called a control transformer CTis part of a position servo that includes a servo amplifier and servo motor.

Resolver (electrical) - Wikipedia

The motor is geared to the CT rotor, and when the transmitter's rotor moves, the servo motor turns the CT's rotor and the mechanical load to match the new position. CTs have high-impedance stators and draw much less current than ordinary synchro syncros resolvers when not correctly positioned.

Synchro transmitters syncros resolvers also feed synchro to digital converters, which provide a digital representation of the shaft angle. Synchro variants[ edit ] So called 'brushless synchros' use rotary transformers that have no magnetic interaction with the usual rotor and stator to feed power to the rotor.

This device can be used in any application in which the exact rotation of an object relative to another object is needed, such as in a rotary antenna platform or a robot. In practice, the resolver is usually directly mounted to an electric motor.

Synchro Overview | Products - Resolvers/Synchros | TAMAGAWA SEIKI CO.,LTD.

The syncros resolvers feedback signals are usually monitored for multiple revolutions by another device. This allows for geared reduction of assemblies being rotated and improved accuracy from the resolver system.

Many of the aerospace applications are used to determine the position of an syncros resolvers or torque motor position. Other types of resolver include: