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AC Operated, Light Weight RVDT

AC Operated, Light Weight RVDT
AC Operated, Light Weight RVDT
Product Code : R30A
Product Description

The R30A RVDT (Rotary Variable Differential Transformer) is an angular position sensor that incorporates a proprietary non-contact design which dramatically improves long term reliability when compared to other traditional rotary devices such as synchros, resolvers and potentiometers. This unique design eliminates assemblies that degrade over time such as slip rings, rotor windings, contact brushes and wipers, without sacrificing accuracy.

High reliability and performance are achieved through the use of a specially shaped rotor and wound coil that together simulates the linear displacement of a Linear Variable Differential Transformer (LVDT). Rotational movement of the rotor shaft results in a linear change in the amplitude of the output signal, directly proportional to the shaft angle change, while the phase of this output signal indicates the direction of displacement from the null point. Non-contact electromagnetic coupling of the rotor provides infinite resolution thus enabling absolute measurements to a fraction of a degree.

AC operation eliminates the need for integrated signal conditioning components, thereby offering the user an extremely wide operating temperature range of -55oC to +150oC. Factory calibrated to operate over a +30 degree range, the R30A offers a non-linearity of less than +0.25% of full range. Extended range operation up to a maximum of +60 degrees is possible with increased non-linearity. Packaged in a small, size 11 servo mount, aluminum housing with flying lead termination, the R30A is ideal for space restrictive applications.

Also see our other angular position sensor models, R36AS (stainless steel housing, MS style connector), RSYN (high output, shock and vibration tolerant), R30D and R60D (bipolar DC operation), and the RVIT-15 Series (single ended DC operation, voltage or current output).

Details :

  • AC operation
  • ±60 degree angular sensing range
  • Light weight
  • Non-contact design
  • Wide operating temperature range
  • Size 11 servo mount
  • Anodized aluminum housing

Features :

  • High accuracy
  • Infinite resolution
  • Long term reliability
  • Wide -55o to +150oC operating temp range
  • Rugged anodized aluminum housing
  • Shielded ABEC 3 precision bearings

Application :

  • Valve position
  • Machine tool equipment
  • Rotary actuator feedback
  • Dancer arm position
  • Process control

Specification :

Parameter

@10kHz Input Frequency (recommended)

@2.5kHz Input Frequency

Angular range, degrees

+30o

+40o

+60o

+30o

+40o

+60o

Non-linearity, % of FR, max.

+0.25%

+0.5%

+2%

+0.25%

+0.5%

+2%

Output at range ends (*)

87mV/

116mV/V

174mV/V

69 mV/V

92 mV/V

138 mV/V

Sensitivity

2.9 mV/V/degree

2.3 mV/V/degree

Temp coefficient of sensitivity

0.02%/oF [0.036%/oC], 20 to +160oF [-7 to +71oC]

Not specified

Input / Output impedance

370Ω / 1300Ω

135Ω / 600Ω

Phase shift

+3o

+35o

Input voltage and frequency

3 VRMS @ 2.5 to 10 kHz (10kHz recommended)

Null voltage

0.5% of FSO, maximum

Environmental And Mechanical Specifications :

Operating temperature

-67oF to +300oF [-55oC to 150oC]

Mechanical angular range

360 degrees (no stops)

Bearings

Shielded ABEC 3 precision

Shaft diameter

3/16 inch [4.76 mm]

Housing material

Aluminum, anodized

Mounting

Size 11 servo mount per BU-ORD

Moment of inertia

0.53 x 10-6 inch.lb-force.second2 [0.61 x 10-6 Kg-force.cm.second ]

Maximum torque, unbalance

0.004 inch.ounce-force [0.3 gram-force.cm]

Maximum torque, friction

0.015 inch.ounce-force [1.1 gram-force.cm]

Shaft load capability

10 lb [4.5Kg] Axial; 8 lb [3.6 Kg] Radial

Electrical connection

6 lead wires, AWG 28, PTFE insulation, 12 inches [30cm] long

Weight

1.3 oz [36 Grams]

Contact Us

401 & G-414-416 A Wing, Kailash Indl. Complex, Near Dynalog, Behind Godrej Colony, Park Site, Vikhroli (West), Mumbai, Maharashtra, 400079, India
Phone :+917259463319