Digital guide
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Kollmorgen RH-11D-3001-E1
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Product Name: Resolver (Brushless Rotary Transformer) Feedback Device
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Product Introduction: The RH-11D series is a rugged, high-reliability resolver designed for harsh environments where optical encoders fail. It provides absolute position data via electromagnetic coupling.
Detailed content
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Technical Specifications:
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Type: 2-pole or multi-pole variable-reluctance or wound-rotor resolver
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Transformation Ratio: Typically 0.5 – 1.0
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Input Voltage: 5 – 7 Vrms (carrier frequency 5 – 10 kHz)
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Accuracy: ±5 to ±15 arc-minutes typical
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Operating Temp: -40°C to +155°C
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Functional Features:
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Immunity to dust, oil, vibration, EMI.
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No electronics on rotor; inherently explosion-proof.
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Long life — no bearings or optical components.
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Application Scenarios: Explosive environments, steel mills, mining, aerospace, heavy-duty servo motors (e.g., Goldline EB series).
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Performance Parameters:
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Electrical Error: < 10 arc-min
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Phase Shift: < 10°
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Material & Structural Features:
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Stator/Rotor: Stacked laminations with precision-wound copper coils.
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Housing: Nickel-plated steel or stainless steel.
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Connector: Often MS-type military-grade circular.
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Working Principle:
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A primary excitation winding induces voltage in two orthogonal secondary windings (sine/cosine) whose amplitudes vary with rotor angle; external RDC converts to digital position.
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Installation Requirements:
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Mount concentrically with motor shaft; tight tolerance (<0.02 mm runout).
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Shield cabling to reduce noise on carrier signal.
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Usage Precautions:
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Avoid strong DC magnetic fields near resolver.
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Ensure resolver power supply frequency matches drive expectation.
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