MD MD-AWD-150, Руководство пользователя

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Mustang Dynamometer MD-AWD-150 Page 14
2.2.2b Control and Monitoring System (not attached to Dyne)
This section will define the Control and Monitoring Sub-system that are not attached to
the dyne.
2.2.3 Software System
PowerDyne PC software (the complete PowerDyne PC manual can
be found on the software back-up CD.)
2.3 P
RINCIPLES
O
F
O
PERATION
A Mustang Chassis Dynamometer will give you the ability to simulate actual road loads
while the vehicle is stationery. This enables you to perform tests on a vehicle while test
diagnostic instruments are connected to the vehicle’s engine and exhaust system.
The Dynamometer consists primarily of drive roll sets, power absorbing units (PAUs).
The PAUs are belted directly in the dyne’s driveline. It is prevented from “freely” rotating
by the installation of the load cell. The “load” is measured by the load cell and is
transmitted to the control system via an electrical signal. The PAU absorbs this load by
energizing stationary electric field coils with a direct current. These coils establish
magnetic fields through which the iron rotors of the PAU are rotated. This rotation
generates eddy-currents in the rotors, which produce a force that is counter to the
direction of the rotary motion. The power absorbed by the PAU is dependent upon the
amount of DC power applied to the field coils and the RPM of the spinning rotors. The
speed of rotation of the rotors is measured by a magnetic device called a magnetic
pickup and is transmitted to the control system.
When both torque (from the load cell signal) and speed (from the magnetic pickup signal)
are known, horsepower can easily be determined.