Home About us Encoders Astec Encoder VR Resolver Other Products Contact us
VR Resolver RO Series DG Series JAPANESE
  VR Resolver Rotasyn made by Admotec, equivalent of 1X-BRX Smartsyn Tamagawa seiki
   Patented in USA and EC EN9100:2009, AS9100 Rev.c, JIS Q 9100: 2009, ISO 9001:2008
Click any picture on this page and refer to original Admotec related pages.
VR Resolvers Rotasyn made by Admotec in Switzerland are unique brushless resolvers with excellent features.
Rotasyn is made only with 3 coils at stator side  while conventional brushless resolvers have 3 coils at rotor side and another 3 coils at stator side, 6 coils in total.   (Stator side: Power, Sine & Cosine,  Rotor side: Power & Reference.  Most manufactureres add the third coil to be shorted, i.e. not connected to anything.)

Rotasyn rotor is, instead of 3 coils, made of solid metal with soft magnetic material.  In addition, the 3 coils at stator side are made of very strong wires with Kapton insulation from Dupont for severe applications. Therefore, the reliability of Rotasyn goes up to double of conventional resolvers.
Rotasyn is a VR (Variable Reluctance) resolver but it outputs 360°(Electrical=Mecanical) absolute signals, in one revolution of a shaft   while ordinary VR resolvers output 2X( 2x360°E./ 2x180°M.),  3X( 3x360°E./ 3x120°M.),
4X( 4x360°E./ 4x90°M.), ... per revolution.
The standard type of Rotasyn is "built-in type", frameless , or so called Pancake type.
Many users are using standard types of Admotec Rotasyns , RO Series, as they are.
However, when some customers need resolvers with their required specifications, customized Rotasyns will be available.

Standard Rotasyn Resolvers Custom Rotasyn Resolvers
   
RO Series    DG Series Read More

  Admotec VR Resolver Rotasyn Family




Among the the above stated Rotasyn Family, (1) RO Series, (7)(8) DG Series, can be called Standard types. Several items from these group can be delivered "Off the shelf" immediately on your orders.

Rotasyn RO- 20110, 3620, 5032, 7557,
in Stock :   DG- 2010, 3620 and DG2-3620.

(1) RO Series :  depending on conditions,
(1) Standard: Operating Temp. : -40°C to +135°C
(2) High Temp.: Operating Temp. : -70°C to +200°C

(7) DG Series depending on conditions,
(1) Standard: Operating Temp. : -40°C to +150°C
(2) High Temp.: Operating Temp. : -60°C to +230°C (10) Multispeed : Oper. Temp.: -200°C to +250°C
 
The hermetically sealed Rotasyn has a structure like the drawing shown left. Inside of the stator is covered with a stainless steel cup (colored pink) completely.  The cup is attached to the stator inside by laser welding perfectly.
In the case of conventional resolvers, the sealing is made on the rotating shaft side. Therefore. it can not be a perfect sealing and the sealing part wears as time passes by.
Even in the case of Rotasyn, only the ones of which Stator side is sealed, and in addition, Rotor side has "buildt-in Bearing" structure, can be a perfect Hermetic Resolver. Such resolvers only can stand against corrosive gas or liquid.
  Applications:

Aerospace Automotive Marine Industrial Automation


Oil Driling Nuclear Power Generation
  Examples of Application
Airplane:     High reliability to protect the lives
Racing car:  Accelaration, high speed, vibration, shock
Submarine:  Rudder position feedback, Salt water.
Steel Plants: Very high temperature and strong shocks
Oil Drilling:  Drill head control in harsh environment
Nuclear Power:  Nuclear radiation resistant
COPYRIGHTS 2009 MOC Mitaka