Full-variable-frequency driving coal mining machine electrical system and frequency converter control method

• Main Authors: LUO KUN, HUANG GUANGZHONG, LI QING, OH SE-KYUN, NAN PENGFEI
• Format: Patent
• Language: Chinese; English
• Published: 05.04.2024
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; EARTH DRILLING; ELECTRICITY; FIXED CONSTRUCTIONS; GENERATION; MINING; MINING OR QUARRYING

The invention provides a fully-variable-frequency-driven coal mining machine electrical system which comprises contactors including a left cutting contactor, a pump contactor, a traction contactor and a right cutting contactor, frequency converters including a left cutting frequency converter, a pump frequency converter, a traction frequency converter and a right cutting frequency converter, motors including a left cutting motor, a pump motor, a traction motor and a right cutting motor, the isolating switch is sequentially connected with a left cutting contactor, a left cutting frequency converter and a left cutting motor, the isolating switch is further sequentially connected with a pump contactor, a pump frequency converter and a pump motor, the isolating switch is further sequentially connected with a traction contactor, a traction frequency converter and a traction motor, and the isolating switch is further sequentially connected with a right cutting contactor, a right cutting frequency converter and a ri