(Solved): BLDC motor in cooling fan. A cooling fan in a computer uses a BLDC motor made of two coils in the st ...

BLDC motor in cooling fan. A cooling fan in a computer uses a BLDC motor made of two coils in the stator and two permanent magnets as shown
in Figure 5.114. Each coil is split into two, half the number of turns on each of the opposite sides of the pole. There are two options for operation. (1) To drive one coil at a time or (2) to drive both coils at the same time.
(a) Using option (1), show the voltage on each coil over time.
(b) Using option (2), show the voltage on each coil over time.
(c) If coils must be driven for 10 ms in either option, which option develops more power and what is the speed of rotation in RPM?