The Magtrol HD-500-6N is a hysteresis dynamometer engineered for precise torque and speed measurement in motor testing applications. Built on a frictionless magnetic braking principle, it delivers consistent torque loading independent of shaft speed—from no-load through locked-rotor conditions. The hysteresis braking system uses magnetic flux restraint between a reticulated pole structure and specialty steel rotor assembly, eliminating mechanical friction and wearing parts except bearings. This architecture enables full torque at stall, repeatable measurements within ±0.25% to ±0.5% of full scale, and extended service life with minimal maintenance.
Technical Specifications
• Maximum Torque: 120.0 oz·in
• Drag Torque (De-Energized at 1000 rpm): 0.5 oz·in
• Input Inertia: 1.09 × 10⁻⁴ kg·m²
• Maximum Speed: 25,000 RPM
• Maximum Continuous Power: 80 W
• Maximum Intermittent Duty Power: 14 kW
• Accuracy: ±0.25% to ±0.5% of full scale
• Operating Temperature Limit: Component temperatures below 100°C for continuous duty
– Key Features
• Hysteresis braking system operates without physical contact between rotating components
• Speed-independent torque loading ensures repeatable measurements across the entire speed range
• Full torque capability at zero rpm enables stall-condition testing
• Convection cooling with optional compressed air or dedicated blower configurations
• Integrated air flow sensor provides overheating protection
• Available in short or long base plate variants for flexible test setup integration
• Torque units available in English, Metric, and SI standards
– Typical Applications
The HD-500-6N suits low to medium power range motor testing requiring precise, speed-independent torque measurement and extended operational reliability without component wear.
– Compatibility & Integration
Base plate options (short and long versions) accommodate various test fixture configurations. The compact input inertia (1.09 × 10⁻⁴ kg·m²) and 25,000 RPM maximum speed rating support diverse motor platforms and dynamometer coupling schemes.
