9
Magtrol Hysteresis Dynamometers
Chapter 1 – Introduction
GENERAL
INFORMA
TION
1.2
FEATURES OF THE HYSTERESIS DYNAMOMETER
All Magtrol Hysteresis Dynamometers (HD and ED Series) feature the following:
•
Hysteresis Braking System:
The dynamometers do not require speed to create torque, and
therefore can provide a full motor ramp from free-run to locked rotor along with precise
torque loading.
•
Air Flow Sensor:
Any Magtrol Hysteresis Dynamometer that is internally ported for
compressed air and/or blower cooling contains an air flow sensor that provides protection
against overheating and operator error
•
Standard Torque Units:
English, metric and SI are available.
•
Easy Calibration
Unique features of each series are listed below.
1.2.1
HD S
erieS
Magtrol’s HD Series Dynamometers are versatile and ideal for testing in low to medium power
ranges. Features include:
•
Accuracy:
±0.25% to ±0.5% full scale, depending on size and system configuration.
•
Custom Dynamometers:
For special torque and speed requirements.
•
Encoder Switch:
Optional feature that allows the user to switch between a 60 and 600-bit
encoder or a 60 and 6000-bit encoder.
1.2.2
eD S
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Magtrol’s ED Series Dynamometers are high performance dynamometers specifically designed to
address the severe, high vibration conditions inherent in internal combustion engine testing. Features
include:
•
Accuracy:
±0.25% full scale.
•
High Speed Capabilities:
12,000 to 25,000 rpm, depending on model.
•
Rugged Stainless Steel Shaft:
Larger shaft for additional strength.
•
Specially Reinforced Load Cell:
Stainless steel pin used at contact point to prevent
premature wear from excess vibration.
•
Gusseted Pillow Blocks:
Adds additional front and rear support.
•
Brake Cooling:
Blower cooled to maximize heat dissipation.