Servo motor servo motor used in some special occasion than stepping electric timing more appropriate. Servo motor is a kind of accurate control the speed of special motor, the motor internal mainly choose closed-loop control, thus it can be real-time speed to the speed of the motor. Servo motor is equipped with rotary encoder to feedback control precision, torque are large. It in a very short period of time can reach the rated speed, so it is very suitable for frequent start-stop and launch torque requirements of the situation. Servo motor power can do a lot together, can be widely used in the production of enterprises. So-called shaft current refers to the base of the servo motor shaft, bearing, the current in the circuit. The occurrence of shaft current will cause damage to motor, the phenomenon of the most common are: conflict loss and fever add, eventually cause bearing burned; Or ball bearing surface erosion, worsen bearing operation function. So we need deal with the problem of shaft current talents to the best of perhaps the excellent functions of servo motor. Seek treatment scheme, han debao electrical science for us in advance the cause of the servo motor shaft current occurs. (1)Magnetic field is asymmetric; (2)Manufacture, installation is not good, because the rotor eccentricity caused air gap uneven; (3)There is crack two semicircle detachable stator core; (4)Have fan lay in the number of the spell of the stator core piece type choose not appropriate. Mentioned here trust we can think of a way to deal with shaft current. In the han debao motor as we supply the following two simple processing methods: (1)Motor design, insulation, the sliding bearing housings and base of the rolling bearing outer ring and end cover insulation. (2)Eliminating pulsating magnetic flux and power harmonic (As in the inverter output side reactor with communication)。
