It is an object to control the peak of drain current and control overload in a same switching device in a switching power supply which has a load of a transformer and so on, and to prevent a complicated circuit and an increase in the number of terminals of a control circuit. The system traffic may be arranged into different categories. The web server application can be further operable to identify a location of the one or more resources, to select a software application according the location of at least one of the resources, and to execute the software application in the portable communication device. The load distribution mechanism may be configured to support the plurality of idler rollers and to equalize normal forces applied by each idler roller towards the corresponding drive roller. In the rotor arrangement, the rotor poles include laminated stacks of metal sheets whose laminations are stacked in a tangential direction.