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GT TRANSDUCERS

Brushless-Electromagnetic Position and Velocity Sensors

Features

  • Highest Reliability Obtainable
  • Absolute Position Feedback
  • Infinite Resolution
  • Excellent Repeatability
  • Wide Temperature Spans
  • Long Transducer Cable Runs
  • Velocity and Tachometer Feedback
  • High Speed Operation
  • Electronically Passive Device
  • Inherent Transformer Isolation

Availability

  • Standard Sizes 11 and 23
  • Nema 12,13 and 4
  • Pinion or Keyed Shaft
  • Stainless Steel
  • Radiation Resistant
  • Submersible
     

Resistance To

  • Shock
  • EMI
  • Vibration
  • RFI
  • Magnetic
  • Interference
     

Application

Computer Conversions GT Transducers are brushless, Electromagnetic, Rotary Sensors used to provide Precise Absolute or Incremental Position, and Velocity feedback in harsh environments. All Computer Conversions Transducers are continuous rotation, bidirectional, and electronically passive devices (no electronic components to degrade or fail), that require zero maintenance, and may be installed in virtually inaccessible locations.

Rotary Transformer Construction Does
Not Contain

  • Wipers
  • Brushes
  • Pin-Contacts
  • Electronics
     
  • Glass
  • Optics
  • LED’s
  • Ferrites
     

Description

The GT transducer is basically a two stage, air-coupled rotary transformer, having precision shielded ball bearing as the only physical contact between the casing (stator), and the rotary shaft input (rotor). The transducer biases AC signals used as inputs to either stator or rotor windings; providing outputs that are proportionate in phase, or ratiometrically proportionate in amplitude, o the angular position of the shaft. Because transformer couplings are used both to excite and retrieve data; slip rings, brushes, or contacts, are neither used or required. Without brushes; brush bounce, misalignment. and wear related problems do not exist, and infinite repeatable feedback can be expected.
The GT transducer’s low output impedance, high signal to noise ratio, moderate frequency range, and open winding configuration; facilitates long transducer cable runs in harsh electrical environments.

Mechanical

All transducer assemblies feature double shielded ball bearings, selected Mil-Grade lubricants and stainless 303 shaft inputs. All Industrial Grade Transducers (Nema 12+) feature flex-coupling isolated shaft inputs supported by dual sets of precision sealed and shielded ball bearings. The Industrial Grade construction offers high axial and radial rigidity, secured environmental protection, and extended life without compromising accuracy. The Nema 12 grade transducers exterior is available with black anodized aluminum finish (standard) or stainless steel.

Electrical Interface

Computer Conversions offers GT compatible decoder electronics as discrete modules, printed circuit card assemblies, snaptraks, readouts, and sub systems. A large variety of decoders are available to obtain virtually any position or velocity feedback criteria required. Dependent on the particular decoding technique employed; the transducer outputs may be scaled in an analog or digital format to indicate direct degrees, inched, meters, percentage, inches per second, or RPM’s etc. Direct compatibility is offered for many motion, servo, programmable, and process controllers used in industry today.

 

Outline Dimensions


R90-11GT

R90-11GT1

SIZE 11 TRANSDUCER


HR90-11GT

HR90-11GT1

NEMA 12 TRANSDUCER


OPTIONS

STAINLESS STEEL
KEYED SHAFT
SHAFT SEAL
RIGHT ANGLE
3.5” DIA. FLANGE
SUBMERSIBLE
HIGH RADIATION
STATOR PRIMARY

....................-SS
....................-K
....................-SE
....................-RA
....................-CF
....................-WS
....................-RR
....................-G


Specifications

Mechanical
Max Starting Torque
Moment of Inertia
Max. Slew Speed
Max. Shaft Load:

    Axial
    Radial

Weight

SIZE 11
.07 oz./in.
3 gm/cm2
3000rp


.3 lbs.
.7 lbs.
.4 oz.

m

Environmental (All Units)

NEMA 12
1.0 oz./in.
15 gm/cm2
3000rpm


35 lbs.
75 lbs.
3 lbs.

Shock
Vibration
Operating Temperature
Radiation

50g for 11 msec.
15g to 2000 cps.
-20oCto +125oC
106 RAD