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This paper proposes a design method of a common-mode current feedback type EMC filter in an interconnection system. First, the relationship between the switching frequency of the PWM inverter, the common-mode feedback current and the volume of the filter reactor is theoretically estimated. Moreover, the switching frequency and the current capacity of switching devices which are necessary in order...
This paper discusses the conduction noise reduction possibility of a transformer-less three-level V-connection rectifier-inverter system. This circuit is used for the main circuit in an Uninterruptible Power Supply (UPS) system. The efficiency of this circuit is higher than that of the conventional three-phase rectifier-inverter circuit due to no isolated transformer in output side. In this paper,...
This paper discusses a volume of an EMC filter and a cooling system that are used for a PWM inverter with wide band-gap devices. At first, the volume of reactor that is used for EMC filter such as common mode coke coils and differential mode choke coils are estimated by theoretically. Then, the relationship between the carrier frequency of the PWM inverter and the total volume of filter reactors are...
This paper investigates a PWM inverter for an adjustable speed drive using wide band-gap devices. First, the relationship between the carrier frequency of the PWM inverter and the volume of an EMC filter is clarified by simulation, besides the relationship between the carrier frequency and the volume of a cooling system. As a result, the total volume of the inverter system that contains an EMC filter...
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