This process turns energy from the engine into heat in the rotor which is dissipated by cooling water flowing through the absorber. The spinning section creates resistance to the magnetic field thus applying load to the engine. A rotor spins inside a magnetic field created by energizing a stationary coil. Eddy Current (EC) AbsorbersĮddy current dynamometers use an electro magnetic brake to load an engine. Water brake dynamometers are also the most economical type of absorber for dynamic testing making them great for a wide range of applications from testing internal combustion engines to electric motors. The major advantage of water brake absorbers is that they offer a wide dynamic range meaning one dynamometer can test a wide range of engine speeds and engine torques – the SF-902S dynamometer for example is rated for 15,000 rpm and up to 1,250 lb.ft of torque, however it can also easily test small single cylinder engines that make less than 40 lb.ft. An automatic control valve bolted to the dynamometer controls the amount of water in the dynamometer based on the test requirements to produce the required load against the engine. There is a stationary side (stator) and a spinning side (rotor) each with cup shaped pockets that transfer water from one side to the other. Water brake dynamometers use a hydraulic brake that converts the energy produced by the engine into heat transferred to the water flowing through the dynamometer. We will break down some of the differences here to help you select the proper engine dynamometer for your needs. Whether it be water brake, eddy current or alternating current (AC), motor load has the same general guidelines. Selecting any SuperFlow Engine Dynamometer typically comes down to four main factors:
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