1, the efficiency of the generator can be tested by measuring its output power and input power P1 to P2 calculated;
output P2 = √3UIcosΦ, should be done using the load resistance, so cosΦ = 1, P2 = √3UI, measured generator the output voltage and output current can be calculated, noted that the voltage and current line voltage and the line current are herein;
input power P1 = T xn / 9550, where: T is the motor torque, measured by the torque meter, units are Nm; n is the motor speed, the unit is divided / revolution; P1 input power can be calculated in units of kilowatts;..
the efficiency of the generator is: [eta] = (P2 / P1) / 100%;
2, motor efficiency calculation:
measuring the motor input voltage U1 and current I1, the P1 = √3 xU1 x I1 x cosΦ , (U1, I1 cos [Phi] and the instrument can be used to test out); here are the line voltage and current
measured motor torque and speed, then P2 = T xn / 9550;
the motor efficiency: [eta] = (P2 / Pl) / 100%;
. 3, the parameters are obtained at the rated state rated efficiency;
4, adjusting the output can be obtained have various efficiency operating state, the motor can be drawn in a variety of shaped work Efficiency in normal curve;
Reference: https://zhidao.baidu.com/question/1824284050544345028.html