Series motor?????

Question

can someone help me solve this physics of mechanics question??

A series d-c motor is capable of developing a far higher torque than a shunt d-c motor. this means that

1. a series motor will withstand a temporary overload better than a shunt motor will.

2. a series motor can bring a heavy load up to full speed quicker than a shunt motor can.

3. series motors have higher horsepower rating than shunt motors of the same physical size have.

4. a series motor can be more heavily loaded at normal running speed than a shunt motor of same horsepower can be.

thanks....

Answer 1

1. What's meant by "withstand"? Not burn out? Then this one's tricky. The way a series motor supplies all that torque is by drawing more current. Too much of this will burn it out or blow a breaker. If "withstand" means recover speed after a slowdown due to a brief overload, then yes.

2. This seems OK; at least the series-wound will accelerate out of the low-speed region quicker.

3, 4. No. The high torque output occurs at lower rpms, where the series motor puts out less "back EMF" and thus draws a higher current. Maximum power of both motor types is at higher rpms.