Selection of frequency converter:

(1) The model number of the inverter. Considering that the gantry bed itself has high requirements for the hardness and dynamic response of mechanical properties. In recent years, gantry bed-crews have often been used in combination with milling or grinding. The feed rate during two milling and grinding is only about 1% at the time of creation, so the drag system is required to have good low-speed running performance.

(2) The CIMR-G7A series inverters produced by Yaskawa Corporation of Japan have the following main advantages due to the three-level control method:
1 reduces the impact on the motor insulation material.
2 Reduces interference caused by carrier frequency.
3 Reduced leakage current.

In addition to this, even in the absence of feedback vector control, the output torque can reach 150% of the rated torque at 0.3 Hz. Therefore, the control method of "no feedback vector control" is enough. Of course, if you choose the "vector control" control method, it will be more perfect.