Synchros & Resolvers

Synchros

As a circuit element, the synchro is essentially a variable-coupling transformer; the magnitude of the magnetic coupling between the primary and secondary, and hence the magnitude of the output voltage, varies according to the position of the rotatable element. In function, the synchro is an electromechanical transducer. A mechanical input such as a shaft rotation is converted to a unique set of output voltages, or a set of input voltages is used to turn a synchro rotor to the desired position.

Synchros can be classified into two overlapping groups: torque synchros and control synchros.

Torque synchros include transmitters (CG), differentials (CD) and receivers (CR).

Control synchros include transmitters (CG), differentials (CD) control transformers (CT), resolvers (CS), linear transformers (LT) and the two-hybrid units: transolvers (CSD) and differential resolvers (CDS).

Resolvers

DIMO Corp. supplies quality resolvers/motion technology products for aerospace, military and commercial applications. Motion feedback sensors can be used to provide velocity and position information for closed-loop electronic control, as well as brushless DC motor commutation. They contain no internal electronics or optics and are unaffected by electrical noise, heat, shock, and vibration. Some key features of aerospace/military resolvers are listed below:

Features

• 1, 2, 4, 8, 16, 32 and 36 speeds standard; others available
• 400 – 5,000 Hz frequency range standard; frequencies up to 20,000 Hz available
• High immunity to electrical noise
• Rugged design to meet demanding environments – no glass discs or optics to fail
• Compact design
• Mounts directly to shaft and housing – no coupling devices needed
• Brush or brushless designs
• High reliability – long-life design; no bearings or electronics
• Custom modifications available

Integration Capabilities

• Ideal for vertical integration with brushless motors and slip ring assemblies
• Commutation of brushless motors
• Feedback sensor for servo systems
• Compatible with R / D converters

We supply the following resolvers: Size 11 Digital Resolver: Model DRBB-11-AA-01AA, Rotary Variable Differential Transformers (RVDT) (AS-827 Series, AS-865-001, AS-887-001), Size 11 Single Speed Brushless Resolvers, Low-Cost Brushless Pancake Resolvers (Size 15, Size 21, Size 22) and Aerospace / Military Resolvers.