When the power supply and the inverter are replaced, for example, if the inverter has a problem, in order to make an emergency, let the motor be directly changed to be driven by the power frequency power supply; Perhaps the inverter is used for soft starting, and after the motor is accelerated to the power frequency speed, it is changed to be driven by the power frequency power supply.
When multiple motors are replaced, when the capacity margin of the inverter is large, one inverter can drive multiple motors to operate, which is called group operation. However, these motors do not start or stop together, and sometimes one motor may be directly involved in the variable frequency operation when other motors are running steadily. Conversely, when multiple motors are running together, sometimes one motor is overloaded or has a problem that needs to be withdrawn. Considering the above situation, it is often necessary to add a contactor on the output side of the inverter.
In principle, do not let the stopped motor suddenly pull into the operation during the operation of the inverter, especially during frequent operation, and simply damage the inverter. In addition, regarding the power frequency power supply and the inverter replacement drive motor operation system, it is necessary to pay attention to the phase sequence of the two power supplies to ensure that the motor steering is common.
When the power supply and the inverter are replaced, for example, if the inverter has a problem, in order to make an emergency, let the motor be directly changed to be driven by the power frequency power supply; Perhaps the inverter is used for soft starting, and after the motor is accelerated to the power frequency speed, it is changed to be driven by the power frequency power supply.
When multiple motors are replaced, when the capacity margin of the inverter is large, one inverter can drive multiple motors to operate, which is called group operation. However, these motors do not start or stop together, and sometimes one motor may be directly involved in the variable frequency operation when other motors are running steadily. Conversely, when multiple motors are running together, sometimes a motor is overloaded or needs to be withdrawn. Considering the above situation, it is often necessary to add a contactor on the output side of the inverter.
In principle, do not let the stopped motor suddenly pull into the operation during the operation of the inverter, especially during frequent operation, and simply damage the inverter. In addition, regarding the power frequency power supply and the inverter replacement drive motor operation system, it is necessary to pay attention to the phase sequence of the two power supplies to ensure that the motor steering is common.
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