Instructions for using AC power dynamometer

AC electric dynamometer is currently one of the more advanced load testing equipment on the market, especially in the load testing of small and medium power as well as low-power power machinery. It can take into account both low-speed and high-speed load testing of various power machinery. Compared with other types of load testing equipment, it has obvious advantages in performance, reliability, and ease of maintenance; Especially in the load measurement of low-speed machinery, it is unparalleled by other methods, as it can provide the rated torque of an electric dynamometer almost from 0 speed; Of course, another advantage of AC power dynamometer is its energy feedback function. It can feed back the energy emitted by the tested machinery to the grid in the form of electrical energy for use by other devices, rather than converting the energy into heat energy and consuming it. In this regard, the economic efficiency of AC dynamometer after construction cannot be compared to other dynamometers, as it saves energy and generates economic benefits. Especially in this era of increasing energy scarcity, conservation has been increasingly valued by more and more enterprises.

The direct torque control magnetic field orientation uses stator magnetic flux, which adopts the concept of discrete voltage state and hexagonal magnetic flux trajectory or approximate circular magnetic flux trajectory. As long as the stator resistance is known, it can be observed. Direct torque control emphasizes the direct control and effectiveness of torque, treating torque directly as the controlled variable, which is both direct and simplified.

Main technical parameters:

1. Speed measurement accuracy: ± 1r/min, ± 1 word

2. Torque measurement accuracy: ± 0.4% FS

3. Speed control accuracy: ± 5r/min (constant speed control mode)

4. Torque control accuracy: ± 0.2% FS

5. Dynamic response speed:<5ms

6. Variable frequency control method: DTC direct torque control