Click on the following links to get more information about Eddie Carnet’s dynamometer:
Eddy Carnet dynamometer working mechanism
There are two main parts in dynamometers. The first part is called the rotor and the central axis, which is connected to the motor with a coupling. The second part is called the stator or fixed body, which is completely suspended and is connected to the dynamometer by means of an arm.
Using an intermediate fluid or an electromagnetic braking force, the rotor is held by the stator. Stator reaction force is measured using a dynamometer. The torque is calculated from the product of the force along the length of the arm.
This dynamometer is Eddy Carnet vortex brake type. This dynamometer is only absorption and works based on the law of eddy current or Foucault current. In this dynamometer, the stator part is coiled and is stimulated by electricity and produces a magnetic field. In this dynamometer, the rotor is made in the form of vanes. With the rotation of the vane rotor in the magnetic field created by the stator, the changes in the magnetic flux created according to the lens law oppose the main poles and act as a braking force.
The braking force causes heat generation in the wire and is transferred to the outside of the dynamometer by the cooling fluid of water (water-cooled dynamometer) or air (air-cooled dynamometer).
The rotor and its bearing support are connected based on the output connection, so that in addition to the high power of power transmission, they also have very good co-axiality in terms of dynamic balance.
Eddycarnet dynamometers are suitable for operation in both directions of rotation and with a wide range of power absorption and control. Also, they have the ability to work in both types of reliable and transient tests.
Schematic view of Eddy Carnet dynamometer structure
In order to choose the right dynamometer for engine testing, it is necessary to choose the right device for testing with the characteristic curve of the engine and the power and torque of the dynamometer. The capacity and torque of Eddy Carnet dynamometers manufactured by Mobtakeran Pars Andish are shown in the following diagrams. These dynamometers include 3.5, 12, 40, 170, 210, 330 kW dynamometers.
Since the design and manufacture of dynamometers is carried out in the Mobtakeran Pars Andish company, this company; According to the needs of the consumer, it is able to produce other dynamometers in the power range of 3 to 400 kW.
Power of Eddy Carnet dynamometers manufactured by Pars Andish Mobtakeran Company
The torque values of these dynamometers are also given in the figure below. In addition to checking the power cover, the torque cover should also be checked.
Torque cover of eddy carnet dynamometers manufactured by Mobtakeran Pars Andish company
To choose a dynamometer, it is better to use a confidence margin of 15 to 25 percent. In the following figures, as an example, how to choose the right dynamometer for an engine is shown using its power and torque curve, as well as the power and torque cover of the dynamometer.
Choosing the right dynamometer for engine testing by checking the power curve
Choosing the right dynamometer for engine testing by checking the torque curve
To learn about hydraulic dynamometer, you can see this article.