What Are The Advantages And Disadvantages Of DC Servo Motors?

DC servo motors are also becoming more and more common now, and their uses are very extensive. So what advantages does it have for so many businesses to choose? What are the disadvantages?

The DC servo motor has good linear adjustment characteristics and fast time response. Advantages: Accurate speed control, very hard torque-speed characteristics, simple control principle, easy to use and cheap. Disadvantages: The control is more complicated, the drive parameters need to be adjusted on the spot to determine the PID parameters, and more connections are required.

Advantage:

1) Small size/light weight, and high efficiency, light load can be close to 90%;

2) Can work under low pressure, easy to make;

3) Utilize high-function permanent magnet poles to be able to reach rate/high power;

4) The system price of servo motor and servo driver is relatively cheap;

5) The basic functions such as the rotation accuracy of the reaction and the positioning function are very high.

6) Resonant and vibration-free operation. The inertia torque ratio is large, which can quickly accelerate the load. "Reserved" ability is strong, continuous 2-3 times of power, short duration; with "reserve" torque, 5 to 10 times the rated torque in a short period of time. keep cool

7) The motor is proportional to the load current consumption. low noise

8) Good start-up and speed regulation performance, wide speed regulation range, stable, stronger overload capacity, affected by electromagnetic interference.

9) The DC of the DC motor is relatively more energy-saving and environmentally friendly than the AC.

Shortcoming:

1) It is necessary to adjust the servo according to the needs of the load;

2) There will be powder worn by the brushes and cannot be used in a clean environment;

3) The brushes will be consumed and require maintenance: the complex structure limits the further reduction of the volume and weight of the DC motor, especially the sliding contact between the brushes and the commutator causes mechanical wear and sparks, making the DC motor more faulty , Low reliability, short life, heavy maintenance workload. The commutation spark not only causes electrical corrosion of the commutator, but also a source of radio interference, which will have a harmful effect on the surrounding electrical equipment. The larger the capacity of the motor and the higher the speed, the more serious the problem will be

Although the DC servo motor has the defects caused by the contact between the brush and the commutator, the basic performance can match the communication servo motor, and the utility is also similar. In addition, the knowledge and manufacturing technology of DC servo motors and servo amplifiers have many things in common with AC servo motors. It is still necessary to choose DC servo or AC servo according to their own needs.