Caractéristiques principales

Extended operation up to ±60°
High level, low noise DC output
Long term reliability
Excellent temp. performance
Rugged anodized aluminum housing
Shielded ABEC 3 precision bearings

About the R30D RVDT

The R30D RVDT (Rotary Variable Differential Transformer) is a DC operated non-contacting rotary position transducer. Integrated signal conditioning enables the R30D to operate from a bipolar ±15 VDC supply, and provide a high level DC output that is proportional to the full angular sensing range of the device. Calibrated for operation over ±30 degrees, the R30D provides a +/-3.75VDC output, with 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.

Internally, the DC supply voltage is converted into an AC carrier signal which excites the primary coil of the sensor. An integrated demodulator amplifier with low-pass filter converts the differential secondary output into a smooth, high level, linear DC output signal relative to the angular position of the shaft.

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). Non-contact electromagnetic coupling of the rotor provides infinite resolution thus enabling absolute measurements to a fraction of a degree.

The R30D features a rugged aluminum size 11 housing making this rotary position sensor ideal for applications where integrated signal conditioning and small size are required.
Also see our other angular position sensor models, R60D (±60°, bipolar DC operation), RVIT-15 Series (single ended DC operation, voltage or current output), R120LC (+5VDC operation, low cost) and R30A/R36AS (AC operation).

Applications for R30D

Hydraulic pump control
Throttle lever position feedback
Rotary actuator feedback
Dancer arm position
Reeler/Dereeler
Valve position

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Spécifications techniques

Spécifications	Valeur
Angular range, degrees	±30º (standard), ±40º, ±60º
Bearings	Shielded ABEC 3 precision
Electrical connection	4 lead wires, 28AWG , PTFE insulation, 12 inches [30cm] long
Frequency response	500Hz @ -3dB
Housing material	Aluminium, anodized
Input current	25mA maximum
Input voltage	+/-15VDC ±10%
Maximum torque, friction	0.015 inch.ounce-force [1.1 gram-force.cm]
Maximum torque, unbalance	0.004 inch.ounce-force [0.3 gram-force.cm]
Mechanical angular range	360 degrees (no stops)
Moment of inertia	0.53 x 10-6 inch.lb-force.second2 [0.61 x 10-6 Kg-force.cm.second2]
Mounting	Size 11 servo mount BU-ORD
Output at range ends	±3.75VDC, ±5.00VDC, ±7.50VDC
Output current	5mA
Output impedance	1 O maximum
Sensitivity	0.125 V/degree
Shaft load capability	10 lb [4.5Kg] Axial; 8 lb [3.6 Kg] Radial
Storage temp.	-67°F to +257°F [-55°C to 125°C]
Temp coefficient of sensitivity	0.04%/ºF [0.07%/ºC], over operating temp. range
Weight	1.9 oz [54 grams]

R30D RVDT