To provide a small-sized grid-tie inverter wherein leakage current and high-frequency noise can be suppressed.
The grid-tie inverter includes an inverter 1 that pulse-width-modulates the output of a direct-current power supply 5, a first capacitor pair 41 composed of capacitors connected in series so that a neutral point is formed on the input side of the inverter, a second capacitor pair 42 composed of capacitors connected in series so that a neutral point is formed on the output side of the inverter, a bypass path of high-frequency common mode current formed by connecting the neutral point of the first capacitor pair and the neutral point of the second capacitor pair through a neutral point connecting line g, a ground capacitor 11 provided between the neutral point connecting line forming the bypass path and ground, first common mode choke coils 31 and 32 provided in at least one place between the first capacitor pair and the second capacitor pair to suppress a common mode current produced at the inverter, and an output filter 2 that converts a pulse width modulated voltage outputted from the inverter into a sinusoidal alternating current.
TSUDA JUNICHI
MOCHIKAWA HIROSHI
| JP2007336743A | 2007-12-27 | |||
| JP2009148078A | 2009-07-02 | |||
| JP2001069762A | 2001-03-16 | |||
| JP2007068311A | 2007-03-15 | |||
| JP2009148162A | 2009-07-02 |
Iwa Saki Kokuni
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
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