Abstract: A dc commutator doubly salient reluctance motor is composed of a stator component, a rotor component, a commutator component, a brush component and a motor housing. The commutator does not rotate with a shaft, but the brush rotates with the shaft. The number of commutator segments connected with stator windings is the lease common multiple of the number of stator salient poles and the number of rotor salient poles. The number of brushes is at most equal to the number of the rotor salient poles. The connecting sequence that the commutator segments are connected with the stator windings is contrary to the distributing sequence that the stator windings are arranged on the stator salient poles. The speed-adjusting, braking and reversal of the motor are achieved by shifting the circumferential position that the commutator surrounds the shaft. The output power and the mechanical-electrical efficiency of the motor are changed by the included angles between the brush's front and back edges.

Abstract: The present invention discloses an intelligent traffic system. The system at least comprises a traffic control center, a traffic information service center, a cellular mobile communication system, a road toll collection system and an in-vehicle terminal, which are connected with each other via a wired communication network. The in-vehicle terminal communicates with the traffic control center, the road toll collection system and the traffic information service center respectively via the cellular mobile communication system. The present invention further claims an in-vehicle terminal used in an intelligent traffic system and a method for realizing an intelligent traffic system with a cellular mobile communication system. By adopting the intelligent traffic system, its construction cost will be reduced greatly.