Synchronous Motors And Converters Theory And Methods of Calculation And Testing
Synchronous Motors And Converters Theory And Methods of Calculation And Testing
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F. EI, F being the actual operating field current, and A\ the field current taken from the BIPOLAR DIAGRAM 155 short-circuit curve at the point corresponding to the actual armature current 7. The reason for this last step is obvious when it is recalled that when the machine in question is operated as generator on short circuit, EI and J^i are zero and A\ = F. This is in fact the definition of AI.
Equation (5) gives the radii of the constant power circles in ampere- turns; but it is somewhat sim...pler to compute these radii from the formula given for the E. M. F. Diagram, Eq. (19), Chapter II. This formula may be written Radius (volts) = Z+ ( } - 2, ....... (6) or in armature amperes, Radius (armature amperes) = *l I j -- -. . . (7) Designate by k af the ratio of short-circuit armature amperes to the corresponding field amperes as taken from the short-circuit curve. Then the radius in field amperes is Radius (field amperes) = - / ( j -. . . .
(8) 156 SYNCHRONOUS MOTORS When P2 = O the circle passes through O and A, and the corre- sponding radius is, Radius (field amperes, P 2 = 0)= -=CO.
What to read after Synchronous Motors And Converters Theory And Methods of Calculation And Testing?
You can find similar books in the "Read Also" column, or choose other free books by Andr Blondel to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
F. EI, F being the actual operating field current, and A\ the field current taken from the BIPOLAR DIAGRAM 155 short-circuit curve at the point corresponding to the actual armature current 7. The reason for this last step is obvious when it is recalled that when the machine in question is operated as generator on short circuit, EI and J^i are zero and A\ = F. This is in fact the definition of AI.
Equation (5) gives the radii of the constant power circles in ampere- turns; but it is somewhat sim...pler to compute these radii from the formula given for the E. M. F. Diagram, Eq. (19), Chapter II. This formula may be written Radius (volts) = Z+ ( } - 2, ....... (6) or in armature amperes, Radius (armature amperes) = *l I j -- -. . . (7) Designate by k af the ratio of short-circuit armature amperes to the corresponding field amperes as taken from the short-circuit curve. Then the radius in field amperes is Radius (field amperes) = - / ( j -. . . .
(8) 156 SYNCHRONOUS MOTORS When P2 = O the circle passes through O and A, and the corre- sponding radius is, Radius (field amperes, P 2 = 0)= -=CO.
What to read after Synchronous Motors And Converters Theory And Methods of Calculation And Testing?
You can find similar books in the "Read Also" column, or choose other free books by Andr Blondel to read onlineMoreLess
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