Abstract: A transformer is provided, which includes a magnetic core, a primary coil module including a coil support arranged in the magnetic core and a primary coil formed on the coil support, an upper secondary coil module including an upper insulation molded body arranged on an upper portion of the primary coil module and an upper plate coil buried in the upper insulation molded body and arranged to face the primary coil, and a lower secondary coil module including a lower insulation molded body arranged on a lower portion of the primary coil module and a lower plate coil buried in the lower insulation molded body and arranged to face the primary coil.

Abstract: A transformer is provided, which includes a magnetic core, a primary coil module including a coil support arranged in the magnetic core and a primary coil formed on the coil support, an upper secondary coil module including an upper insulation molded body arranged on an upper portion of the primary coil module and an upper plate coil buried in the upper insulation molded body and arranged to face the primary coil, and a lower secondary coil module including a lower insulation molded body arranged on a lower portion of the primary coil module and a lower plate coil buried in the lower insulation molded body and arranged to face the primary coil.

Abstract: A magnetic disc which can easily detect the pole position of a brushless DC motor at a standstill, a magnetic disc apparatus employing the magnetic disc and a motor driving method are provided. The magnetic disc includes a first plane and a second plane opposite to the first plane on/from which data is recorded or the recorded data is read. Each plane is provided with a data recording zone where data is stored and a parking zone. A pole information recording zone, disposed between the data recording zone and the parking zone on at least one side of the first and second planes of the magnetic disc, stores the information of a motor pole. This information indicates the rotation position of a brushless DC motor at a start-up time and is used during the start-up phase to begin rotating the motor in the proper direction so as not to damage the disc.