Lee, Hong, Degerman, Kang & Waimey
Method for compensating instantaneous power failure in medium voltage inverter and medium voltage inverter system by using the same
Provided are a method for compensating instantaneous power failure in medium voltage inverter and a medium voltage inverter system by using the same, the method for compensating instantaneous power failure in medium voltage inverter including a plurality of power cells supplying a phase voltage to a motor by being connected to the motor in series, the method including decreasing an output frequency of the plurality of power cells by as much as a predetermined value at a relevant point where an input voltage of the plurality of power cells is less than a reference value, decreasing the output frequency at a predetermined deceleration gradient, and maintaining the output frequency during restoration of input voltage as long as a predetermined time, in a case the input voltage is restored.
LSIS Co., Ltd.
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inventional additional inventional additional additional
Sung Guk Jae Hyun Seung Ho Jung Muk
Ahn Jeon Na Choi