Q1 a. Sketch the typical power conversion equipment layout of: • A battery electric vehicle passenger car which has two

[answerhappygod]

Q1 A Sketch The Typical Power Conversion Equipment Layout Of A Battery Electric Vehicle Passenger Car Which Has Two 1 (56.67 KiB) Viewed 36 times

Q1 a. Sketch the typical power conversion equipment layout of: • A battery electric vehicle passenger car which has two in-wheel AC motors. • A series-parallel hybrid passenger vehicle. • A three-phase AC-grid connected PV farm with three separate PV panel arrays. • A three-phase regenerative load linked to the three-phase AC grid. b. Explain the different functions of the power conversion equipment in the grid- linked regenerative load system in part a. Q2 A power device package has a thermal resistance Renje of 0.9 K/W. The power device without a heatsink has a Ronja of SO K/W. The ambient air temperature is 18 *C. The power device has a maximum junction temperature of 150 C. a. Draw the equivalent electrical model for the thermal circuit of a power device that is attached to a case (consider Rinde, Rina and Renca). b. What is the maximum power that can be dissipated by the power device without a heatsink? The device is at its steady-state temperature If an infinite heatsink Rence is O K/W used, what is the maximum power that can be dissipated by the power device? The device is at its steady-state temperature Q3 A generator has a 500 MW output power and a 95% efficiency. The generator is located in ambient air temperature of 33°C. Ren = 610K/W n = 70x10 / Calculate the time after the generator is switched on for the generator's temperature to reach 125 C. Calculate the generator steady-state temperature. G The generator is disconnected (switched offt) once it reaches steady-state conditions. Calculate the time taken for the temperature to fall to 50 °C. c. b. Q4 A series hybrid vehicle is travelling at 70 km/h up a 10 incline. The vehicle mass is 1,600 kg, its drag coefficient is 0.15, its cross section area is 2 m., and it has a wheel radius of 0.2 m. A gearbox is used to connect the machine shaft to the drive axle. The gearbox ratio is 10:1, and it has an efficiency of 98%. Assume the air density is 1.2 kg m Neglect friction a. Calculate the shaft torque and speed for the electrical machine (assume the vehicle has just one driven wheel). b. How much greater is the power requirement for climbing the 10 slope compared to that on a flat road?