lectric Motor Drives Modeling, Analysis, and Control 1e Krishnan (Solution Manual) questions and verified answers graded A+

lectric Motor Drives Modeling, Analysis, and Control 1e Krishnan (Solution Manual) questions and verified answers graded A+ Power [watts] - correct answer-The rate at which work is done Vs [volts] x Is [amps] x n-motor (0.6) P = T x ω [rad/s] P = W / t P = (F x d) / t Conversion to horsepower - correct answer-P [watts] * .001341 [hp/watt] Horsepower to torque - correct answer-1 [hp] = 750 [W] = 550 [lb-ft/s] = 33,000 [lb-ft/min] Electrical efficiency - correct answer-denoted by n- motor, assumed value = 60% Velocity [in/min] - correct answer-pi x D [in/rev] x N [rev/min] Torque [lb-ft] or [N-m] - correct answer-T = F * r T = I * α [rad/s^2] Plotting Torque vs. Speed Graph - correct answer-1. Calculate power 2. Convert power to torque 3. Plot linear curve Power Trends for Motors with Linear Torque Curves - correct answer-1. Peak power will always occur at half the no-load speed of the motor 2. Motor should always operate within 25% of peak efficiency Velocity at the point of contact between 2 gears - correct answer-ω2 = ω1 * (r1 / r2) Forces transmitted between the teeth in contact - correct answer-T2 = T1 * (r2 / r1) Origins of Horsepower Unit - correct answer-In the early 1700's James Watt determined a horse could The capacity to do work - correct answer-Energy Energy made available by the flow of electrical charge - correct answer-Electrical Energy Energy resources that are replaced by natural processes - correct answer-Renewable energy Most commonly used motors in commercial and industrial applications for being the most energy efficient. - correct answer-Three phase motors A rotating output device that converts electrical energy into rotating mechanical energy - correct answer-Electric motor A starter that has an electrically operated switch and includes overload protection - correct answer- Magnetic motor starter An electronic device that controls the direction, speed, torque, and other operating functions of an electric motor in addition to providing motor protection and monitoring functions. - correct answer- Electric motor drive A motor starter that can start and stop a motor but cannot reverse the motor direction. - correct answer- Manual motor starter