Which DC motor is used in shears and punches?(a) Shunt motor(b) Series motor(c) Cumulative compound motor(d) Differential compound motorThis question was addressed to me in unit test.I need to ask this question from Operating Characteristics of DC Compound Motor topic in section Characteristics of DC Motors of DC Machines

Which DC motor is used in shears and punches?(a) Shunt motor(b) Series

1.	Which DC motor is used in shears and punches?(a) Shunt motor(b) Series motor(c) Cumulative compound motor(d) Differential compound motorThis question was addressed to me in unit test.I need to ask this question from Operating Characteristics of DC Compound Motor topic in section Characteristics of DC Motors of DC Machines
Answer» Correct answer is (c) Cumulative compound motor The explanation is: Cumulative compound DC motor provides high starting TORQUE which is REQUIRED at instant of starting in shears and punches. It also provides good SPEED regulation in ORDER to vary pressure. So, this motor suits well to shears and punches APPLICATION.

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