Maximum rotational power the dynamometer can be subjected to and still operate within specifications. This is typically limited by absorption or braking technology and configuration.
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For chassis style dynamometers, the maximum speed of the vehicle being tested. This is typically given in vehicular speed units such as miles per hour.
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In a chassis type unit, rollers on the dynamometer support the wheels of one or more axles. One of the rollers transmits the power from the vehicle to the dynamometer for measurement of horsepower and speed. Vehicles typically drive onto the rollers and/or the rollers lift up from a pit or recess. Environmental regulations often require a dynamometer during exhaust emission testing.
Dynamometer can be adjusted for horizontal, vertical, or intermediate testing. This is typically achieved through trunnion mounting so the dynamometer can pivot to the desired angle.
Other unlisted, specialized, or proprietary mounting type.
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Air dynamometer use an impeller to assess the power produced by a jet engine or gas turbine. The exhaust from the turbine drives the air dynamometer's impeller where instrumentation on the impeller measures power related parameters. Air is used to load or couple the engine to the dynamometer.
AC dynamometers are essentially AC motors mounted and configured to provide drag against the motor being tested and output the resultant torque and power. They can be mounted on pivoting or movable frames such as trunnions for use in horizontal, vertical, or intermediate positions. They have the ability to motor as well as function as a motor test device.
DC dynamometers are essentially DC motors mounted and configured to provide drag against the motor being tested and output the resultant torque and power. They can be mounted on pivoting or movable frames such as trunnions for use in horizontal, vertical, or intermediate positions. They have the ability to motor as well as function as a motor test device.
Eddy current dynamometers provide restraining torque that increases with shaft speed. Drag is induced via eddy currents generated in a rotating disk that is surrounded by a magnetic field. There is no friction contact; the restraining field operates across an air gap. They are typically designed to reach maximum braking power at the maximum rated speed. Eddy current dynamometers are frequently used in high-speed and high-power testing; they usually require liquid cooling.
Braking drag is applied to the dynamometer rotor vanes via water circulating between the rotor and the stator housing. Power absorption varies with rotor speed and may also be varied with the amount of water in the rotor-stator gap. The water serves the dual purpose of braking torque and heat absorption.
Hysteresis dynamometers use noncontact magnetic braking to apply resistance to motor rotation. The torque loading may be applied independent of shaft speed. The magnetic restraint is frictionless; the magnetic flux field operates in the air gap between the rotor and the stationary poles.
Friction braking system using a magnetic powder medium between the rotor and the stator. The frictional properties of the powder can be changed via the magnetic field provided by a variable current passing through a stationary coil. The braking torque can be applied independent of shaft speed.
Unlisted, specialized, or proprietary braking technology.
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Dynamometer suitable for testing automotive or truck engines, transmissions and other automotive components. Chassis type units are typically used in these applications. Environmental regulations often require a dynamometer during exhaust emission testing.
Most frequently speed reducers, but may include increasers. These are suited for the low-speed and increased torque output of gear boxes, motor gearheads, speed reducers, etc.
Dynamometers designed and sized for the relatively higher power absorption required for engines. These are used for the testing of engines in automotive, marine, agricultural, and heavy transportation applications.
Dynamometer suitable for testing marine engines, transmissions or other marine components. A shaft-mounted unit is typically used in these applications.
Other unlisted, specialized, or proprietary application.
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Dynamometer Interface
All dynamometers will typically have speed and power feedback for performance testing and monitoring. Typical features include encoders or other speed / position sensors, torque arms, and reaction sensors.
Dynamometer interfaces to a computer using serial or parallel connection to a computer. The dynamometer is controlled though drivers and software installed on a PC or industrial computer.
Other unlisted, specialized, or proprietary interface type.
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Visual, audible, or digital signal alarms indicating pass / fail status, operation outside of specifications, or other conditions such as low oil or program failure.
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Monitoring and analysis of input power to motor being tested; these data are synthesized with output performance data to calculate efficiency and other parameters.
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matches as specified. Products with optional attributes
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