Caption: Figure 8: The line-to-line voltage ([V.sub.ab]), the common-mode voltage, and three-phase current
As can be seen from Figure 17, the grounding short-circuit fault of phase A occurs when t = 3 s (Figure 17(a)), and the three-phase current
of AC grid is seriously asymmetric (Figure 17(b)); there is the second-order harmonic component in the DC voltage (Figure 17(c)); the DC component of the three-phase circulating current is not symmetrical (Figure 17(d)); the amplitude of the capacitor ripple voltage of the SM is increased (Figure 17(e)).
Simulation model of overcurrent protection device: 1 - analog inputs of three-phase current
; 2--converter unit (CU); 3--settings unit (Threshold); 4--logic unit (LU) 4.1 instantaneous overcurrent protections LU, 4.2--definite time overcurrent protection LU, 4.3--earth fault protection LU; 5--output signal to the switching equipment
Instead of using nameplate data of the motor, this review uses the average voltage and three-phase current
to calculated horsepower to make the comparison.
In , a fault location method is developed based on synchronized measurements of three-phase current
from all three terminals and additionally three-phase voltage from the terminal at which a fault locator is installed.
Power converters transform the three-phase current
with a rated voltage of 11kV into the 750V direct current required for charging the energy storage unit.
Three-phase voltages and three-phase current
signals of both the circuits obtained through Matlab simulation are sampled at a sampling frequency of 1 kHz and further processed by simple second-order low-pass Butterworth filter with cut off frequency of 400 Hz.
The main control object is to control the three-phase current
to track the setpoint through adjusting the electrode position, which changes the temperate of the furnace indirectly.
Mambetov thinks that plans of the government of the country to cut off three-phase current
violate civil rights of Kyrgyz citizens.
From circuit theory, we know that the instantaneous sum of the three-phase current
values will be zero.
A separate DC input and a means of monitoring motor speed are combined with three-phase current
and voltage measurements to completely characterize the drive's performance.
Power flows from the battery to an inverter that converts the energy into a three-phase current
. The power can then be directed to motors that control traction, lifting hydraulics and steering.