DC motor principles. DC motors consist of rotor-mounted windings (armature) and stationary windings (field poles). In all DC motors, except permanent magnet motors, current must be conducted to the ...

Several industries - including mining, steel, rail and power generation - rely on large motors equipped with commutators to produce the power required by their applications. However, without ...

The class of functions for which the commutator with the Hardy-Littlewood maximal function or the maximal sharp function are bounded on Lq are characterized and proved to be the same. Journal ...