The capacity (non-functional) of the Mitsubishi inverter for the drive motor can be understood from the change in energy flow determined by the operation method.
1. When accelerating or operating at constant speed
The efficiency of the inverter is the output current, that is, how much current the inverter can provide to the motor. The efficiency of this output current of the inverter can be expressed by the rated output current or the overload capacity.
2. During deceleration operation
Since the motor driven by the Mitsubishi variant becomes a generator during the deceleration operation, the flow of energy is from the motor to the inverter, which is the opposite of the acceleration or constant speed operation of the inverter, and the function of the inverter is to consume this energy.
Part of the energy returned by the motor load during deceleration is consumed by the motor, while the rest is consumed by the inverter. In addition, because the returned energy increases the terminal voltage of the smoothing capacitor in the inverter, when the voltage is drawn to a certain value, it will produce regenerative energy consumption or energy return to the power supply side, and the energy can flow albe.
Key points for Mitsubishi inverter capacity selection:
The capacity of the Mitsubishi inverter should match the capacity of the motor it drives, and the selection of the inverter should be determined according to the load characteristics, operation method, etc. In order to prevent accidents (such as the motor cannot start), we should be clear that the inverter drives the motor, and its V/F control torque is higher than that of the power frequency drive in the low frequency area.
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