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Table of Contents
Related Manuals for Magtrol HD-106-1
Summary of Contents for Magtrol HD-106-1
- Page 1 HD-1/HD-2 Series Dial Weight Dynamometers User’s Manual...
- Page 2 While every precaution has been exercised in the compilation of this document to ensure the accuracy of its contents, Magtrol, Inc. assumes no responsibility for errors or omissions. Additionally, no liability is assumed for any damages that may result from the use of the information contained within this publication.
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Page 3: Revisions To This Manual
The contents of this manual are subject to change without prior notice. Should revisions be necessary, updates to all Magtrol User’s Manuals can be found at Magtrol’s web site at www.magtrol.com/support/manuals.htm. Please compare the date of this manual with the revision date on the web site, then refer to the manual’s Table of Revisions for any changes/updates that have been made since this edition. -
Page 4: Table Of Contents
Table of Contents REVISIONS TO THIS MANUAL ........................I REVISION DATE ..................................I TABLE OF REVISIONS ...............................I TABLE OF CONTENTS ...........................II TABLE OF FIGURES ................................ III 1. INTRODUCTION ..........................1 1.1 UNPACKING YOUR DIAL WEIGHT DYNAMOMETER ..................1 1.2 TECHNICAL SPECIFICATIONS ..........................1 1.2.1 HYSTERESIS BRAKE CONTROL POWER .................... -
Page 5: Table Of Figures
Figure 2–1 Torque Scale .............................2 3. TESTING CONSIDERATIONS Figure 3–1 Dynamometer Side View ...........................6 Figure 3–2 HD-106-1 Power Absorption Curve ......................6 Figure 3–3 HD-400-1/2 Power Absorption Curve ......................7 Figure 3–4 HD-500-1 Power Absorption Curve ......................7 Figure 3–5 HD-600-1 Power Absorption Curve ......................8 Figure 3–6 HD-700-1 Power Absorption Curve ......................8... -
Page 6: Introduction
Hysteresis brakes require direct current for torque control. They will not respond to alternating current above a few Hz. The nominal voltage rating for all Magtrol Hysteresis Brakes is 28 VDC. The following is a listing of the resistance and current for each brake, by dynamometer model. -
Page 7: Installation/Configuration
2. Installation/Configuration COUNTER WEIGHTS Begin by installing the dynamometer counter weights that were shipped with your dynamometer. There should be as many counter weights, 2 or 3, as there are torque scales on the dynamometer dial. This total includes the (minimum scale) weight permanently attached to the brake assembly. Note: The dynamometer brake assembly should swing freely. -
Page 8: Connections
Magtrol Dial Weight Dynamometers User’s Manual 2.3.3 onneCtions Connect all items together. The dynamometer controller and speed readout (if applicable) interconnections are straight forward using the cord sets. INITIAL CHECKOUT 1. Be sure the TORQUE control on the power supply is off (CCW). -
Page 9: Testing Considerations
Note: Much of the above is dependent upon motor horsepower, fixturing and other circumstances beyond the control of Magtrol. If reasonable care is exercised, and calibration and maintenance are performed on a regular basis, motor test data accuracy better than... -
Page 10: Torque Scale Graduations
(counterweight) selected, by multiplying (or dividing) by 2 or 4. POWER DISSIPATION All Magtrol Dynamometers are power absorption instruments. As a dynamometer loads a test motor, it is absorbs horsepower from the motor into the hysteresis brake. The brake then converts this mechanical energy into heat. -
Page 11: Figure 3-1 Dynamometer Side View
(3.163 mm / 3.175 mm) Shaft Height 3.50 in (88.9 mm) 0.5 oz·in Torque Ranges 1.0 oz·in 2.0 oz·in Input Inertia 7.04 × 10 lb·ft·s² Maximum Speed 30,000 rpm Maximum Input Power 40 W Figure 3–2 HD-106-1 Power Absorption Curve... -
Page 12: Figure 3-3 Hd-400-1/2 Power Absorption Curve
Magtrol Dial Weight Dynamometers User’s Manual HD-400-1/2 0.2495 in / 0.2500 in Shaft Diameter (6.338 mm / 6.350 mm) Shaft Height 3.50 in (88.9 mm) 2 oz·in Torque Ranges (-1) 8 oz·in 16 oz·in 8 oz·in Torque Ranges (-2) 16 oz·in 32 oz·in... -
Page 13: Figure 3-5 Hd-600-1 Power Absorption Curve
User’s Manual Magtrol Dial Weight Dynamometers HD-600-1 0.4995 in / 0.5000 in Shaft Diameter (12.687 mm / 12.700 mm) Shaft Height 4.812 in (122.22 mm) 50 oz·in Torque Ranges 100 oz·in 200 oz·in Input Inertia 2.34 × 10 lb·ft·s² Maximum Speed... -
Page 14: Fixtures And Couplings
The dynamometer base plate material is an aluminum tool plate that is easily drilled and tapped. The use of helix thread inserts is a good idea if you are going to interchange fixtures often. Note: For an additional charge, Magtrol can perform base plate modifications. -
Page 15: Windage
Since this appears as a load on the motor, not measured by the dynamometer, it becomes a source of error. Windage effects on accuracy tests have been conducted on all Magtrol dynamometers. The percentage of torque loss due to windage ranges between 0.025% and 0.20% of full scale at maximum rated rpm. -
Page 16: Vibration
Magtrol Dial Weight Dynamometers User’s Manual VIBRATION All rotating dynamometer assemblies are precision balanced, however, the dynamometer shaft is cantilevered. This may cause vulnerability to radial forces. At high speeds, some vibration and noise are inevitable but not necessarily harmful. However, excessive resonant vibrations, caused by bent shafts, poor alignment and out of balance couplings will produce excessive data errors and are a safety hazard. -
Page 17: Eddy Currents
User’s Manual Magtrol Dial Weight Dynamometers EDDY CURRENTS There is some Eddy current generation within the brake rotor. These magnetically induced currents cause an increase in brake torque proportional to speed. The larger the hysteresis brake, the higher the rotor surface velocity. Additionally, as brakes become larger the rotor cross-sectional area increases. -
Page 18: Operating Principles
4. Operating Principles SPEED The dynamometer is shipped with an internal speed pickup and two cords: one terminating with a 2-pin plug for the brake power, the other is a 14-pin plug servicing an optical encoder. This encoder consists of an infrared transmitter/receiver pair. On the end of the dynamometer shaft, positioned between the LED and detector, is an optical disc with opaque and clear segments. -
Page 19: Calibration
Various sizes of torque calibration beams and precision calibration weights are available from Magtrol. The pin location on the torque beam precisely fixes the distance. Therefore, the force (weight) required will be equal to the torque value divided by the distance on the beam. - Page 20 Testing, Measurement and Control of Torque-Speed-Power • Load-Force-Weight • Tension • Displacement www.magtrol.com MAGTROL INC MAGTROL SA Subsidiaries in: 70 Gardenville Parkway Route de Montena 77 Great Britain Germany • France Buffalo, New York 14224 USA 1728 Rossens / Fribourg, Switzerland China •...
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