A dynamometer or “dyno” for short, is a device for simultaneously measuring the torque and rotational speed (RPM) of an engine, motor or other rotating prime mover so that its instantaneous power may be calculated, and usually displayed by the dynamometer itself as kW or bhp.
What are the different types of dynamometers?
The two types of dynamometer force gauges are digital and mechanical. A digital dynamometer has a load cell that converts force into electrical signals, which are displayed on an LCD display. With a mechanical dynamometer force gauge, the applied force deforms a strain gauge that is converted into an electrical signal.
What is the advantage of dynamometer?
Costs less than a tension meter. Ensures safety on the job site. Reduces damage on objects. Increases efficiency of the work done on the site by providing accurate and reliable measurements.
What is the working principle of the dynamometer?
A dynamometer is a machine that tests engine power, and different engines require different dynamometers. What types of dynamometers are there? Dynamometers can be classified according to different current usage and speed. The following editor will introduce the classification and working principle of dynamometers for you.
1. DC dynamometer
According to the principle of DC motor, the electromagnetic torque of the motor is applied to the stator and rotor at the same time. The torque on the stator is equal to the torque on the rotor, but opposite in direction, so the torque on the shaft can be measured by the stator.
2. AC dynamometer
The measuring principle of the AC dynamometer is the same as that of the DC dynamometer.
3. Eddy current dynamometer
The working principle of the eddy current dynamometer is that the power machine under test is connected to the input shaft of the electromagnetic slip clutch, which drives the armature to rotate, and the magnetic pole is held by the force measuring arm installed on it, and can only swing at an angle within a certain range. , with the dynamometer, the electromagnetic torque acting between the armature and the magnetic pole can be directly read from the swing angle. When measurement errors such as wind friction loss are omitted, this electromagnetic torque is equal to the output torque of the power machine under test.
4. Hysteresis dynamometer
When the internal coil of the hysteresis dynamometer passes current, it will generate magnetic lines of force and form a magnetic circuit to generate torque. Changing the excitation current can change the hysteresis torque of the dynamometer, so as to achieve the purpose of controlling the load torque and complete the load characteristics. test.
The above is the introduction of the classification and working principle of the dynamometer. I hope it will be helpful for everyone to understand the dynamometer. Among them, the DC dynamometer and the AC dynamometer are collectively referred to as the electric dynamometer.
