| 摘要 |
<P>PROBLEM TO BE SOLVED: To minimize EMI and thermal dissipation in switching circuits responsible for applying power to a load. <P>SOLUTION: A circuit 140 for applying a three-phase power source 100 to a three-phase load 160 comprises: sensing means 110 for sensing first, second and third phases of the three phase power source and respectively generating first, second, and third sense signals corresponding to each of the phases; detection means 120 and 130 for detecting zero crossings and mutual crossings of the first, second, and third sense signals; synchronization means 140 for activating and deactivating command signals and synchronization signals and for determining if command signals and synchronization signals are activated; and switch means 150 for applying the first, second and third phases of the three phase power source 104 to the first, second and third phases of the three phase load 160 depending on the determination of the synchronization means. <P>COPYRIGHT: (C)2012,JPO&INPIT |
