A mine-used four-quadrant high-voltage frequency conversion starter

Abstract

The utility model discloses a kind of mine four-quadrant high-voltage frequency conversion starter, comprising: input unit, for the safety isolation protection of first power signal and second power signal;Feedback unit, for converting first power signal and second power signal into first direct current voltage signal, and energy two-way flow is carried out;So as to realize the system energy that motor feedback is sent back power grid under the working condition of greater slope, improve the utilization of energy, reduce power consumption;Rectifier unit, for rectifying operation to first direct current voltage signal, obtain first rectified voltage signal;Frequency conversion unit, for converting first rectified voltage signal into three-phase alternating voltage signal;Control unit, for receiving external input control instruction, and send control instruction to other unit;Power frequency unit, for controlling and protecting the output of 1140V power frequency loop, realize power frequency motor start-stop;Control and protect 127V power frequency loop, realize lighting and the power supply of 127V power frequency loop.

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