Wherever electricity is converted into power, or electrical energy into mechanical energy (mostly rotating), it is about the good, old electric motor. Good for electronics engineers, because this type of engine has significantly less mechanical “disturbance” than steam or gasoline engine engines. “Well established” to electronic engineers because arguably all electric motors have long since been invented and hardly anything is happening with their technology. However there are many types of electric motors, and they all need to be controlled suitably for different purposes.