Question
Download Solution PDFIn electrodynamometer movement, the deflection of the pointer is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF|
Name of Instrument |
Deflection |
Measured Value |
|
|
Moving coil instrument |
θ ∝ I |
Average value |
|
|
Moving iron instrument |
θ ∝ I2 |
RMS value |
|
|
Electrodynamometer instrument |
θ ∝ I1I2 ∝ I2 |
RMS value |
|
|
Hotwire instrument |
θ ∝ I2 |
RMS value |
|
Name of Instrument |
PMMC |
MI |
Electrodynamometer |
|
Deflecting Torque (Td) |
BINA |
|
|
|
Deflection (θ) |
|
|
|
Where B is flux density in Tesla.
N is the number of turns
A is a cross-section area.
I is the current flowing through the instrument.
L is self-inductance and M is mutual-inductance.
Last updated on Jun 4, 2024
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