User Guide of EM730 Series Inverter Install a noise filter on the output side of the inverter. Install a metal tube outside the cables. Install the inverter in a metal casing. Make the inverter and motor grounded reliably. Connect the main circuit and control circuit separately. Use the shielded cables in the control circuit, and connect them according to the wiring method in Chapter 3. 6.2.6 Action of leakage circuit breaker When the inverter is running, the leakage circuit breaker works. will be generated.
Please use the dedicated leakage circuit breaker with the current sensitivity Since the inverter outputs high-frequency PWM signals, a high-frequency leakage current above 30 mA. If an ordinary leakage circuit breaker is used, use a leakage circuit breaker with the current sensitivity above 200 mA and action time of more than 0.1 s. 6.2.7 mechanical vibration The inherent frequency of the mechanical system resonates with the carrier frequency of the inverter. The motor is not faulty, but the mechanical system produces sharp resonant sounds. This is caused by the resonation between the inherent frequency of the mechanical system and carrier frequency of the inverter.
Please adjust the carrier frequency (F00.23) to avoid resonation. The inherent frequency of the mechanical system resonates with the output frequency of the inverter. Resonation between the inherent frequency of the mechanical system and output frequency of the inverter will lead to mechanical noise. Please use the vibration suppression function (F05.13), or install the anti-vibration rubber or take other anti-vibration measures on the motor base. PID control oscillation The adjustment parameters P, Ti and Td of the PID controller are not set correctly. Please set the PID parameters again.
6.2.8 Motor rotation in the absence of inverter output Insufficient DC braking for stop The DC braking torque for stop is too small. Please increase the set value of the DC braking current for stop (F04.21). 53