35
the power disturbance generator and remains closed during the tests. The power disturbance
generator controls the motor.
Current waveforms are captured using hall effect current transformers placed between the
power disturbance generator and the induction motor. Motor voltage waveforms are
captured from sense leads placed at the motor terminals. The motor voltage, current, torque,
and speed are all acquired with a 12 channel Nicolet transient analyzer operating at a 1 MHz.
sampling rate.
Figure 25 Electrical test configuration
3.2.3 Experimental Test Plan
Momentary service interruption data is acquired for two different load inertias and four
different motor loads, as described in Table 1. Data is collected every 0.10 of a cycle. Load
inertia "A" is approximately equal to half the inertia of the 10 hp induction motor rotor.
Inertial "B" is approximately equal to twice the rotor inertia.
Table 1 Experimental tests conducted
100% Load
75% Load
50% Load
25% Load
Inertia "A"
1-40 cycles
1-20 cycles
1-20 cycles
1-20 cycles
Inertia "B"
1-40 cycles
1-20 cycles
1-20 cycles
1-20 cycles
Summary :
Table 1 Experimental tests conducted 100% Load 75% Load 50% Load 25% Load Inertia "A" 1-40 cycles 1-20 cycles 1-20 cycles 1-20 cycles Inertia "B" 1-40 cycles 1-20 cycles 1-20 cycles 1-20 cycles
Tags :
cycles,motor,load,120,inertia,current,generator,disturbance,power,table,captured,waeforms,approximately