Instructions for use of AC power dynamometer

　　AC power dynamometer is currently the most advanced load dynamometer on the market, especially in the low-speed and high-speed load dynamometer tests of small and medium-power and small-power power machinery. Compared with other types As far as the dynamometer loading equipment is concerned, it has obvious advantages in performance, reliability, ease of maintenance, etc.; especially in the dynamometer loading of low-speed machinery, it is unmatched by other methods. It can be almost from The rated torque of the electric dynamometer can be provided at the speed of 0; of course, the biggest advantage of the AC electric dynamometer is the energy feedback function, which can return the energy emitted by the tested machine to the power grid in the form of electrical energy. It is used by other equipment, instead of converting energy into heat energy. From this point of view, the economical efficiency of the AC dynamometer after its completion is unmatched by other dynamometers, because it saves energy, which is equivalent to generating Economic benefits. Especially in this era of increasing energy tension, conservation has been valued by more and more companies.

　　The direct torque control field orientation uses the stator flux linkage, which uses the concept of discrete voltage states and hexagonal flux linkage trajectories or approximately circular flux linkage trajectories. As long as the stator resistance is known, it can be observed. Direct torque control emphasizes the direct control and effect of torque. Using torque directly as the controlled variable is both direct and simplified.

　　The main technical parameters:

　　1. Speed ​​measurement accuracy: ±1r/min, ±1 digit

　　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. Frequency conversion control method: DTC direct torque control