With increase in output torque the weight and size of the electric motor is said to increase. What is the relation between the torque output and mass? Is the mass of the motor directly proportional to torque output?
follow MG say fr Ac machine and Claton hankok for DC m/c..generally for a particular type of m/c power= K* volume * rpm.... and power = torque * RPM* K1 ..So, torque=K2* volume of the m/c (bore volume mainly) for a particular type of m/c and at same rated power.
Thank you mr Pinaki. What I inferred from your answer is that torque of the motor is directly proportional to the motor volume. So is it safe to say that torque is directly proportional to its mass? Also if it holds true then will the constant of proportionality change with the type of motor?
average air gap flux density(B_avg), ampere-conductor loading (/ac) are also important governing factor...which are varies depending of material grade used in motor..and mass density of material..like fr Permanent magnet machine(PMSM) say 5kW, 1500 rpm ,415 volt , 3-ph PMSM motor have 1/4 mass & 1/3 volume of same rated cage rotor- induction machine....So, what i have said earlier is only valid fr a particular type of machine..
Thank you mr Pinaki for your answer. WOuld you be able to refer to me any books or paper for the same?
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