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A d.c, differentia! compound generator acts as
- a)d.c. cumulative compound generator
- b)d.c. cumulative compound motor
- c)d.c. differential compound motor
- d)none of the above
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A d.c, differentia! compound generator acts as ...
Compound field windings: GENERATOR FIELD POLE. When the series winding is connected to aid the shunt winding, the generator is called a cumulative compound-wound generator; if the series winding is connected to oppose the magnetic field, it's called a differential compound-wound generator.
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A d.c, differentia! compound generator acts as ...
Explanation:
A d.c. differential compound generator is one in which the series field winding is wound in such a way that it opposes the shunt field winding. As a result, the series field flux is weakened and the shunt field flux is strengthened, resulting in a decrease in the generated e.m.f. as the load current increases. This type of generator is rarely used in practice.
On the other hand, a d.c. cumulative compound generator is one in which the series field winding is wound in such a way that it aids the shunt field winding. As a result, the series field flux is strengthened and the shunt field flux is weakened, resulting in an increase in the generated e.m.f. as the load current increases. This type of generator is commonly used in practice.
A d.c. cumulative compound motor is one in which the series field winding is wound in such a way that it aids the shunt field winding. As a result, the motor torque increases as the load current increases, making it suitable for applications where high starting torque is required.
Therefore, a d.c. differential compound generator cannot act as a d.c. cumulative compound generator or motor.
Hence, the correct answer is option B, i.e., a d.c. differential compound generator cannot act as a d.c. cumulative compound generator or motor.
A d.c. differential compound generator is one in which the series field winding is wound in such a way that it opposes the shunt field winding. As a result, the series field flux is weakened and the shunt field flux is strengthened, resulting in a decrease in the generated e.m.f. as the load current increases. This type of generator is rarely used in practice.
On the other hand, a d.c. cumulative compound generator is one in which the series field winding is wound in such a way that it aids the shunt field winding. As a result, the series field flux is strengthened and the shunt field flux is weakened, resulting in an increase in the generated e.m.f. as the load current increases. This type of generator is commonly used in practice.
A d.c. cumulative compound motor is one in which the series field winding is wound in such a way that it aids the shunt field winding. As a result, the motor torque increases as the load current increases, making it suitable for applications where high starting torque is required.
Therefore, a d.c. differential compound generator cannot act as a d.c. cumulative compound generator or motor.
Hence, the correct answer is option B, i.e., a d.c. differential compound generator cannot act as a d.c. cumulative compound generator or motor.
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