The following common problems may be encountered during the installation of Yaskawa frequency converters:
Electromagnetic interference issue: During operation, frequency converters generate high-frequency components, which may cause interference to nearby communication devices such as AM radios. To reduce interference, a filter can be installed, or the inverter, motor and power supply wiring can be grounded by covering them with metal tubes.
Installation space and heat dissipation issues: The frequency converter requires a good heat dissipation environment. During installation, it is necessary to ensure that there is sufficient space around it to guarantee the unobstructed cooling air duct. If the installation space is insufficient, it may cause the inverter to overheat and alarm. In addition, the normal operation of the cooling fan is also of vital importance. If the fan is damaged or the rotational speed is insufficient, it will cause the inverter to overheat.
Power side electromagnetic contactor setting: Although the frequency converter can be used without a power side electromagnetic contactor, when driven over long distances, to prevent automatic restart after a sudden power outage and subsequent malfunctions, it is recommended to install an electromagnetic contactor. However, frequent starts and stops should be avoided to prevent malfunctions.
Wiring problem
Wire diameter and wiring distance: When the wiring distance between the frequency converter and the motor is long, wires of sufficient thickness should be used to avoid low motor torque caused by cable voltage drop.
Grounding and shielding: The control lines of the frequency converter should be wired separately from the strong current circuit to avoid interference. When analog signals are operated remotely, the length of the control line should be controlled within a certain range and shielding measures should be taken.
Power factor improvement issue: Inserting an AC reactor on the power input side of the frequency converter can improve the power factor. However, it should be noted that capacitors and filters for improving the power factor should not be connected to the output side of the frequency converter to avoid damage to the frequency converter or overcurrent protection tripping.
Thermal relay setting: When a frequency converter drives multiple motors or multi-pole motors, a thermal relay should be set between the frequency converter and the motors to prevent the motors from overheating. The set value of the thermal relay should be adjusted according to the value on the motor nameplate.
Inverter parameter Settings: During the installation and commissioning process, it is necessary to correctly set the parameters of the inverter, such as acceleration and deceleration time, torque limit, etc. Incorrect parameter Settings may cause unstable operation or malfunction of the frequency converter.