An EPC connected between a three phase motor and a battery fixes a voltage of the V phase of the three phase motor to a voltage potential of a positive electrode of the battery. The supporting plate includes a first engagement portion, first spring portions, a second spring portion and a second engagement portion. The collapsible display arrangement has a first rod as a support for cooperating with the base unit and for retaining the sheet in an exposed state with the sheet in the exposed state having an upper edge section, a first lateral edge section, and a second lateral edge section.