When selecting an inverter, is it necessary to consider the slot characteristics of the motor rotor?

For continuous changes in speed requirements for the conditions, will use a frequency converter to drag the motor, that is, through the motor power supply frequency changes, to achieve stepless adjustment of motor speed.

In the original tweet we have talked about, through the frequency converter drag motor rotor, its slot shape selection has a greater degree of freedom, rotor slot shape selection can ignore the frequency motor starting process for some special scheme of the slot shape, and directly go to the consideration of other performance requirements to meet and optimize.

For industrial frequency motor starting problems to improve the choice of deep groove rotor or double squirrel cage rotor, just a special rotor groove for industrial frequency motor rotor, one of the measures to improve the performance of industrial frequency motor starting, its groove shape will not affect the motor for the choice of frequency converter, i.e., the frequency converter will not be such groove shape has any effect, only, when the use of frequency converter starting, will not intentionally in the groove of the motor rotor to do so much on the article.

Asynchronous frequency conversion motor rotor slot shape selection is relatively simple; when the industrial frequency motor is frequency conversion use, the inappropriate place lies in the low-speed state of the winding temperature rise control problems, but does not involve the suitability of the rotor slot shape. In order to effectively deal with many motor users will be frequency motor frequency use of the actual, many motor manufacturers specialize in the development of wide-frequency motor, that is, the motor in the frequency of a small range of changes in operation, the temperature rise level can meet or ensure the safety of the motor.

Thus, when the customer chooses the frequency converter, unnecessary attention to the motor rotor slot shape problem, and double squirrel cage and deep groove rotor motor will also be effective in helping the frequency conversion motor starting process.