Operation Above 60 Hz
A motor produces more noise and vibration when it is operated at frequencies above 60 Hz. Also, when operating a motor above 60 Hz, the rated limit of the motor or its bearings may be exceeded; this may void the motor warranty.
Contact the motor manufacturer for additional information before operating the motor above 60 Hz.
Power Factor Correction
DO NOT connect a power factor correction capacitor or surge absorber to the output of the ASD.
If the ASD is used with a motor that is equipped with a capacitor for power factor correction, remove the capacitor from the motor.
Connecting either of these devices to the output of the ASD may cause the ASD to malfunction and trip, or the output device may cause an
Light Load Conditions
When a motor is operated under a continuous light load (i.e., at a load of less than 50% of its rated capacity) or it drives a load which produces a very small amount of inertia, it may become unstable and produce abnormal vibration or trips because of an
Note: For proper operation, the carrier frequency must be 2.2 kHz or above except when operating in the Constant Torque, Variable Torque, or the
Motor/Load Combinations
When the ASD is used in combination with one of the following motors or loads, it may result in unstable operation.
•A motor with a rated capacity that exceeds the motor capacity recommended for the ASD.
•An
When using the ASD with an
Note: For proper operation, the carrier frequency must be 2.2 kHz or above except when operating in the Constant Torque, Variable Torque, or the
•If the motor that is coupled to a load that has a large backlash or a reciprocating load, use one of the following procedures to stabilize its operation.
•Adjust the
•If in the Vector control mode, adjust the response time, or
•Switch to the Constant Torque control mode.
14 | G7 ASD Operation Manual |
