抄録
Induction motor and centrifugal pump systems are often used under changing voltage source condition. So we performed test to clarify the influence of voltage variation and frequency change of AC generator. As a result of test we found the extent of change of the revolution of pump, total head vs. flow characteristics, motor input vs. flow characteristics effected by the change of generator voltage and frequency.
Change of revolution is plus or minus 0.8% for change of plus or minus 1% of frequency, respectively. Also change of revolution is plus 0.06% or minus 0.125% for change of plus or minus 1% of voltage, respectively.
According to change of revolution, quantity of flow, head and water power is also varied with ratio of a power, second power and thrid power, respectively. Furthermore, we find that we can calculate the former characteristics under unusual source voltage and frequency condition, if we find such characteristics under normal source voltage and frequency condition previously.
