The approximate torque-speed curve and its equation for a 1/4 hp shunt-wound DC motor are shown...

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The approximate torque-speed curve and its equation for a 1/4 hp shunt-wound DC motor are shown in Figure P2-14. The rated speed for this fractional horsepower motor is 10000 rpm at a rated voltage of 130V. Determine: a) The rated torque in oz-in (ounce-inches, the industry standard for fractional hp motors) b) The no-load speed c) The operating speed range d) Plot the power-torque curve in the operating range and determine the maximum power that the motor can deliver in the that range. Speed, rpm 12000 10000 8000 6000 4000 2000 25 50 75 Torque, oz-in Figure P2-14 Torque-speed Characteristic of a 1/4 HP, 10000 rpm DC Motor 100 The approximate torque-speed curve and its equation for a 1/4 hp shunt-wound DC motor are shown in Figure P2-14. The rated speed for this fractional horsepower motor is 10000 rpm at a rated voltage of 130V. Determine: a) The rated torque in oz-in (ounce-inches, the industry standard for fractional hp motors) b) The no-load speed c) The operating speed range d) Plot the power-torque curve in the operating range and determine the maximum power that the motor can deliver in the that range. Speed, rpm 12000 10000 8000 6000 4000 2000 25 50 75 Torque, oz-in Figure P2-14 Torque-speed Characteristic of a 1/4 HP, 10000 rpm DC Motor 100

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