Final answer:
To reverse a CSR motor's rotation, the direction of current flow through the coil needs to be changed, which usually involves altering the wiring or the power supply connections so that the automatic switches (brushes) reverse the current at different rotation points.
Step-by-step explanation:
To reverse the rotation of a CSR motor, which typically involves a coil and an automatic switch mechanism known as brushes, you must change the direction of current flow through the coil. When the coil passes through 0 degrees (0 = 0) and 180 degrees (€ = 180°), the brushes automatically reverse the current to keep the motor turning in the same direction. To reverse the motor's rotation, you would need to manually change the wiring of the motor so that the brushes reverse the current at different points in the rotation or alter the power supply connections.