Servo motors are more suitable than stepper motors in some special applications. Servo motors are special motors that precisely control speed. The motors are mainly closed-loop controlled, so the motor speed can be measured in real time. Servo motors are equipped with rotary encoders to feedback control accuracy, and the torque is generally large. It can reach the rated speed in a very short time, so it is very suitable for frequent start and stop and starting torque requirements. At the same time, the power of servo motors can be very large, and they are widely used in enterprise production.
The so-called shaft current refers to the current in the shaft, bearing seat, and base circuit of the servo motor. The generation of shaft current will cause damage to the motor. The most common phenomena are: increased friction loss and heat generation, which eventually causes the bearing to burn out; the bearing surface or ball is eroded, which deteriorates the bearing operation performance. Therefore, we need to solve the problem of shaft current generation in order to maximize the excellent performance of the servo motor. While seeking solutions, X-TEAM brushless motors will first popularize the causes of servo motor shaft current for everyone.
1) Asymmetric magnetic field;
2) Poor manufacturing and installation, uneven air gap due to rotor eccentricity;
3) There are gaps between the two semicircles of the detachable stator core;
4) The number of pieces of the fan-shaped stacked stator core is not selected appropriately.
At this point, I believe everyone can think of ways to solve the shaft current problem. Here, X-TEAM brushless motor provides the following two simple solutions:
1) When designing the motor, insulate the bearing seat and base of the sliding bearing, and insulate the outer ring and end cover of the rolling bearing.
2) Eliminate pulsating magnetic flux and power supply harmonics (such as installing an AC reactor on the output side of the inverter).
The solution to the shaft current problem of the servo motor requires comprehensive consideration of multiple factors such as technology, cost and actual application needs. Through scientific and reasonable protection measures and regular maintenance inspections, we can effectively respond to the challenges brought by the shaft current, ensure the stable operation of the servo motor, and provide solid technical support for the development of industrial automation and intelligence.
If you want to know more about “servo motor”, you can contact the online customer service. X-TEAM brushless motor provides OEM and ODM services for a long time to meet the different needs of different customers.