Find the value of the field current and the value of r

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Reference no: EM13259291

A DC machine (6 kW, 120V, 1200 RPM) has the following magnetization characteristics at 1200 RPM.

If (A) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.8 1 1.2
Ea (V) 5 20 40 60 79 93 102 114 120 125

The machine parameters are Ra = .2 ohms

The DC machine rotates at 1500 RPM and it delivers rated current at rated terminal voltage. The field winding is connected to a 120 V supply. Find the value of the field current and the value of R (field control resistance) required.

Reference no: EM13259291

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