| 摘要 |
PURPOSE:To reduce the number of components by driving a drive circuit so that the phase of a current flowing to each load circuit selected in common with a selecting circuit is different from each other. CONSTITUTION:A transistor(TR) 6-2 is turned on in the timing when a TR5-1 is turned on and TR6-1 is turned on in the timing when a TR5-2 is turned on. As a result, the phase of a coil current flowing to a coil 1-1 and that flowing to a coil 1-3 are shifted by 180 deg.. The current flowing to a switching TR14-1 forming a selecting switch circuit becomes a waveform of full-wave rectification and the maximum current amplitude is the same as that of one coil. Similarly, the current flowing to the TR15-1 becomes the waveform of full-wave rectifier and the maximum current amplitude is the same as that of one coil. Thus, it is not required to increase the current capacity of TRs constituting the selecting switch or its number. |
