The motor does not turn and there is a buzzing sound after power on - Energy Efficiency AC motor drives Manufacturer | Shihlin

1. Causes of failure ① The rotor winding is broken (one phase is disconnected) or the power supply is lost in one phase; ② The beginning and end of the winding lead wire are connected incorrectly or the internal winding is reversed; ③ The power circuit contact is loose and the contact resistance is large; Large or the rotor is stuck; ⑤ The power supply voltage is too low; ⑥ The assembly of the small motor is too tight or the grease in the bearing is too hard; ⑦ The bearing is stuck. 2. Trouble shooting ① Identify the breakpoint and fix it; ② Check the polarity of the winding; determine whether the end of the winding is correct; ③ Tighten the loose wiring screws, use a multimeter to determine whether each joint is falsely connected, and repair it; And eliminate mechanical failures, ⑤ check whether the specified surface connection is mistakenly connected; if the power supply wire is too thin and the voltage drop is too large, correct it, ⑥ reassemble to make it flexible; replace qualified grease; ⑦ repair the bearing. Shihlin Electric - Automation is a high-quality Smart Controller Systems for Automation, The motor does not turn and there is a buzzing sound after power on, Automation, Inverter, AC Drives, Total Solution, Servo Motor, HMI, Controller, Motor Drives, PLC, System Integration manufacturer from Taiwan since 1955. For a long time, the company has maintained a leading position in the domestic market with advanced technologies in heavy electrical systems, electrical equipment, machinery, and automation. Through careful deployment and hard work, the company has also achieved remarkable success in the overseas market.