Abstract: This paper proposes a sensorless speed control method for brushed DC motors that extends the usable speed estimation range by combining current-ripple analysis with high-frequency signal ...

This paper presents the speed control of a separately excited DC motor (SEDC). Motor speed control is focused by controlling the field current. This method can be applied to achieve energy savings in ...

AC induction motors are everywhere, from ceiling fans to vehicles. They’re reliable, simple, and rugged — but there are some disadvantages. It’s difficult to control the speed ...

GM has filed a patent application a variable displacement valvetrain system with rocker shaft porting and insert sleeves for ...

This valuable study characterises the activity of motor units from two of the three anatomical subdivisions ("heads") of the triceps muscle while mice walked on a treadmill at various speeds.