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Maximum Power Absorption:
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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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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Torque Capacity:
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Maximum continuous torque transmission for which the shaft is designed.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Maximum Rotary Speed:
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Maximum rated rotational speed under load.
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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Maximum Linear Speed (Chassis Style):
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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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Search Logic:
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Mounting
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Your choices are...
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Chassis
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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.
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Stand / Pedestal
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Stationary mount or stand for positioning; may be permanent or moveable between tests.
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Adjustable / Trunnion Mount
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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.
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Flange / Shaft Mount
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Flange that couples with flange on motor or engine for direct, in-line mounting.
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Portable
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Unit can be relocated; includes wheeled units.
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Other
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Other unlisted, specialized, or proprietary mounting type.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Technology
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Your choices are...
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Air
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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.
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AC
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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.
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DC
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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.
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Eddy Current
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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.
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Hydraulic / Water Brake
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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.
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Hysteresis
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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.
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Magnetic Powder
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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.
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Prony / Friction Brake
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Braking mechanism uses friction pads or brake shoes to engage the rotating disk or drum coupled to the motor.
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Other
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Unlisted, specialized, or proprietary braking technology.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Tandem / Combination Dynamometer?
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Combination of two or more technologies, or different style dynamometers coupled in tandem.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Application
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Your choices are...
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General Purpose
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The dynamometer can serve a variety of applications, typically small to medium power.
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Automotive
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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.
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Aircraft / Aerospace
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Dynamometer designed for testing aircraft engines, turbines, transmissions or other aerospace components.
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Chain / Belt Drives
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Mechanical power transmission systems such as sprocket-and-chain or pulley-and-belt drives.
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Gearboxes
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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.
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Fluid Power Systems
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Dynamometers including air and hydraulic motors, rotary actuators, etc.
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Gas / Diesel Engines
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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.
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Industrial
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Dynamometers designed for industrial or other heavy-duty applications.
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Marine
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Dynamometer suitable for testing marine engines, transmissions or other marine components. A shaft-mounted unit is typically used in these applications.
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Transmissions
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Dynamometers designed for the testing of automotive, truck, tractor, marine, and similar transmissions.
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Turbines
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Dynamometers suited and sized for relatively high-power torque testing of turbines in the aero-propulsion industry, industrial steam turbines, etc.
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Other
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Other unlisted, specialized, or proprietary application.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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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.
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Dynamometer Interface
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Your choices are...
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Integral Control Console
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Attached or integral panel / display with analog needle meters or digital readouts, control knobs or keys, and straightforward adjustment methods.
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Separate Controller
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External controller device, typically with solid-state control technology and integral user interface.
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Computer
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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.
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Modem / Remote Control
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Remote control and monitoring via modem, Internet addressing, wireless communication, etc.
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Other
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Other unlisted, specialized, or proprietary interface type.
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Search Logic:
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|
All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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PID Control?
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Proportional gain, integral, and derivative control provides precise feedback and control interaction for well-regulated closed loop control.
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Search Logic:
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|
"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Flow Control / Throttling?
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Provisions for controlling flow of variables such as air, water, fuel to the engine being tested, etc.
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Search Logic:
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|
"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Data Acquisition / Logging?
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Power, torque, speed, and other variables are logged during testing, typically into computerized or digital format.
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Search Logic:
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|
"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Alarms?
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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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Search Logic:
|
|
"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Motor Power Analysis?
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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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Search Logic:
|
|
"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Engine Exhaust Analysis?
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For combustion engine dynamometers, measurement of combustion efficiency, levels of various exhaust gases such as CO, etc.
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| |
Search Logic:
|
|
"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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