Can an inverter-driven motor be used as a fixed motor?
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Due to a fault in the frequency converter, I want to remove it and use star-delta starting; can the frequency-driven motor still be used in this situation? I’m not very clear about the issues related to voltage and current.
Sure, generally asynchronous motors can operate at 50 Hz. Higher requirements are needed for those used with frequency converters, as the speed may be higher. If the process requirements are met, it can be manufactured as a regular electric motor
Mainly, the current level cannot be exceeded; to put it simply: the coil temperature must not go above a certain limit!
Variable-frequency motors outperform conventional motors, and they can be driven using the power frequency; many variable-frequency starting cabinets come equipped with the capability to start and operate at power frequency.
First of all, it is possible. However, it should be noted during operation that variable-frequency motors have low leakage reactance, which can easily lead to spike currents and cause overcurrent tripping, especially since the starting current is high at startup.
Could you be more detailed? Why is the leakage reactance lower in frequency conversion-based systems?
Note: : : : Is it a problem with your power supply capacity? ? What size is your motor? Star-delta starting causes a large impact on the power grid! Consider the capacity of the power supply transformer! This post was last edited by rhymebus on 2009-2-22 16:21]
Inverter-driven motors are primarily designed to operate over a wide frequency range! There are also requirements such as independent fan operation and high insulation standards, but these are all advantages – there are no disadvantages!
Sure, it’s possible. With variable-frequency motors, the main concern is heat dissipation of the motor when it operates at low frequencies; operating without the inverter at the standard frequency should not pose any problems.
It’s possible, but the cost-effectiveness is poor; it’s sometimes an overuse of advanced technology. Inverters are the best choice, as they help save energy, have fewer failure occurrences, and offer more protection features