Pwm system inverter
专利汇可以提供Pwm system inverter专利检索，专利查询，专利分析的服务。并且PURPOSE:To prevent core saturation of an electric motor and the like by removing an even harmonic wave ingredient by a method wherein a carrier signal and a control signal are synchronized, a switching frequency of a control element is maintained uniformly and a pulse phase in an output 1 cycle is fixed. CONSTITUTION:An output frequency control signal FS is given, through a V/F converter 1, to a ring counter 2 where a power is divided into one sixth and a ring counter 3 where a power is divided into one half, a timing pulse is led out from the counter 3 by differentiation circuits 4 and 5 and it is added to a delta wave generator 7, its output is nullified at every 60 deg., and a delta wave output is synchronized to the timing pulse by operating analog switches 9 and 10. And the delta wave output is inputted to a logical operation circuit 13 together with a counter 2 output through comparators 11 and 12 and an ignition control is performed by a control element. Therefore, pulse and minus output voltage are symmetrized and an even harmonic wave ingredient can be removed.，下面是Pwm system inverter专利的具体信息内容。
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