Before learning the principle of the dynamometer, let's first understand why we use the dynamometer. The principle of the dynamometer is the theoretical basis for us to achieve the purpose of the dynamometer. How to evaluate whether the motor products we use at ordinary times are good or bad, whether they are suitable for use, how to determine the working point of the motor, and so on. To know this, you need to first understand the motor.
1. The technical indicators for measuring the motor include: input voltage, current, power, power factor, output torque, speed, efficiency
2. Selection of motor operating point. Before designing each motor, determine the voltage, current, speed, power, and other parameters of the motor operating point
3. How does the motor user determine whether the selected motor meets the product design indicators.
In order to know whether the above technical indicators meet the requirements, a test instrument is needed to measure, that is, the measurement of the motor input and motor output, as well as the corresponding relationship between each parameter, which requires the continuous change of the motor load. , and draw a curve based on the measurement data. In this way, a dummy load is needed as the drag object of the motor, and the change of the load can be well controlled. The dynamometer is a motor performance test system developed and produced to complete these measurement needs.
To sum up, the working principle of the dynamometer: The dynamometer system provides a controllable program. By controlling the variable load set by the output of the dynamometer head, the parameters of the motor under different load conditions can be measured. Motor performance for an accurate judgment analysis.
The dynamometer provides a load for the power output of the motor under test, absorbs the mechanical energy output by the motor under test, and converts it into other forms of energy (mainly thermal energy), so the cooling method of the dynamometer is very important, common The cooling methods include water cooling, air cooling, compressor cooling, blower cooling, etc. How are different dynamometers classified and how to select the type? The editor has two special articles to explain: the classification and characteristics of dynamometers, and how to choose a dynamometer type, welcome to read.
This article is originally written by AIP, which focuses on global motor testing. All rights reserved. Infringement must be investigated. Please indicate the source for reprinting.