When the blister is started, the current of the motor will be 5-6 times higher than the rated value, which will not only affect the service life of the motor but also consume more power. The system will have a certain margin on the motor selection during the design, the speed of the motor is fixed, but in actual use, sometimes it is necessary to run at a lower or higher speed, so the frequency conversion transformation is very Necessary. The frequency converter can realize the soft start of the motor, achieve the purpose of energy saving and speed regulation by changing the input voltage frequency of the equipment, and can provide protection functions such as overcurrent, overvoltage and overload to the equipment.
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