What would be the effect of carrying field...

Question 1 / 270705eccefa4bacbc34ba4d48235

Question 1 of 270705eccefa4bacbc34ba4d48235

What would be the effect of carrying field excitation excessively high on a synchronous motor?

Question 1 of 27070

What would be the effect of carrying field excitation excessively high on a synchronous motor?

🔍 Key Concepts

• Synchronous motor power factor control using field excitation • Relationship between field current, stator current, and heating in windings • What happens to a synchronous motor when it is overexcited vs underexcited

💭 Think About

• Think about how increasing field excitation affects the motor’s reactive power: does overexcitation make the motor act more like an inductor or a capacitor? • If field excitation is made very high, what happens to the magnitude of the armature (stator) current and associated I²R losses? • Does changing field excitation alone normally change synchronous speed, or does it mainly affect power factor and current?

✅ Before You Answer

• Verify whether synchronous speed is fixed by supply frequency or by field excitation. • Consider which option is most directly related to increased current and I²R losses when the machine is overexcited. • Eliminate any choices that describe behaviors more typical of a motor that loses synchronism or has mechanical speed instability, rather than electrical overexcitation effects.

Question 1 of 27070

What would be the effect of carrying field excitation excessively high on a synchronous motor?

a tendency for the motor to overspeed

a tendency for the motor to overheat

a loss of motor speed regulation

a tendency for the motor to fall out of step

Question 1 / 270705eccefa4bacbc34ba4d48235

Question 1 of 270705eccefa4bacbc34ba4d48235

What would be the effect of carrying field excitation excessively high on a synchronous motor?

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Question 1 of 27070

What would be the effect of carrying field excitation excessively high on a synchronous motor?