
2
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
erieS
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.
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