Frequency converter and starting control method thereof

The invention discloses a frequency converter and a starting control method thereof. The frequency converter comprises: a sampling unit which is configured to sample the AC input voltage of an AC power supply of the frequency converter and sample the bus voltage of a bus of the frequency converter; and a control unit which is configured to generate a control signal according to the AC input voltage and the bus voltage obtained by sampling, wherein the control signal is used for controlling a trigger angle of a thyristor unit, and the control unit is configured to control the trigger angle of the thyristor unit according to the control signal so as to realize soft start of the frequency converter. According to the scheme, by arranging the soft start scheme based on a thyristor, the number of needed devices is small, and the structure is simple. 本发明公开了一种变频器及其启动控制方法，该变频器包括：采样单元，被配置为采样所述变频器的交流电源的交流输入电压，并采样所述变频器的母线上的母线电压；控制单元，被配置为根据采样得到的所述交流输入电压和所述母线电压，生成控制信号；所述控制信号，是用于控制所述晶闸管单元的触发角的信号；以及，根据所述控制信号，控制所述晶闸管单元的触发角，以实