| 摘要 |
PURPOSE:To improve an efficiency by quickly moving magnetic energy stored in an exciting coil to an exciting coil to be conducted next, and holding a reduced torque due to a rise at the initial time of conducting and a reverse torque due to extension of a drop at the end of conducting at minimum values. CONSTITUTION:Magnetic energy stored in an exciting coil K is discharged through diodes 2/a, 2/b but is not circulated to a power source due to a reverse current blocking diode 18, and hence a capacitor 19 is charged. However, since the capacity of the capacitor 19 is small, it becomes a high voltage. Simultaneously, since transistors 20c, 20d are conductive by a position sense signal, the rise of a conducting exciting coil L is abrupt. Accordingly, the conducting rise and fall of the coil become abrupt, and the rising and falling widths of a 1kW output motor are about 40 microseconds, and reduced torque and reverse torque are prevented to obtain a high speed motor having a high efficiency. |
