Description
Servo motor Dc brushless servo motor features The moment of inertia is small, the starting current is low, and the no-load current is small. Abandon the contact commutation system, greatly improve the motor speed, the high speed can reach 100,000 RPM; When the brushless servo motor implements servo control, the speed, position and torque can be controlled without encoder. Brush no wear, in addition to high speed, but also has a long life, low noise, no electromagnetic interference and other characteristics. Dc brush servo motor features 1. Small size, fast action, fast response, large overload capacity, wide speed range 2. Low torque, small fluctuation, smooth operation 3. Low noise, high efficiency 4. The back-end encoder feedback (optional) constitutes DC servo and other advantages 5. Large voltage variation range, adjustable frequency Advantages of servo motor First, let's take a look at the advantages of servo motors compared to other motors (such as stepper motors) : 1. Accuracy: to achieve closed-loop control of position, speed and torque; The problem of stepping motor out of step is overcome. 2, speed: high speed performance is good, the general rated speed can reach 2000 ~ 3000 RPM; 3, strong adaptability: strong anti-overload ability, can withstand three times the rated torque of the load, especially suitable for instantaneous load fluctuations and require fast start occasions; 4, stability: low speed operation is stable, low speed operation will not produce similar stepper motor stepping phenomenon. Suitable for high-speed response requirements; 5, timeliness: motor acceleration and deceleration dynamic corresponding time is short, generally within tens of milliseconds; 6, comfort: heat dissipation and noise significantly reduced. In simple terms, the ordinary motor that you usually see will turn for a while because of its own inertia after the power failure, and then stop. And servo motor and stepper motor is to stop and go, the response is very fast. But the stepper motor is out of sync.
servo drives (servo drives), also known as "servo controller", "servo amplifier", is a controller used to control the servo motor, its role is similar to the frequency converter acting on the ordinary AC motor, is a part of the servo system, mainly used in high-precision positioning system. Generally, the servo motor is controlled through three ways of position, speed and torque to achieve high-precision transmission system positioning, and it is currently a high-end product of transmission technology. In the speed closed loop of servo drive, the real-time speed measurement accuracy of motor rotor is very important to improve the dynamic and static characteristics of speed control of speed ring. In order to find the balance between measurement accuracy and system cost, incremental photoelectric encoder is generally used as the speed measurement sensor, and its corresponding common speed measurement method is M/T speed measurement. Although M/T velocity measurement method has a certain measurement accuracy and a wide measurement range, but this method has its inherent defects, including: 1) the speed measurement cycle must detect at least one complete code pulse, limiting the minimum measurable speed; 2) The timer switches of the two control systems used for speed measurement are difficult to maintain strict synchronization, and the accuracy of speed measurement cannot be guaranteed in the measurement occasions with large speed changes. Therefore, it is difficult to improve the performance of servo drive speed following and control by using the traditional speed loop design method. Servo driver principle: At present, the mainstream servo drivers all use digital signal processor (DSP) as the control core, which can realize more complex control algorithms, and realize digitalization, networking and intelligence. Power devices generally use intelligent power module (IPM) as the core design of the drive circuit, IPM internal integrated drive circuit, and has overvoltage, overcurrent, overheating, undervoltage and other fault detection protection circuit, in the main circuit also add a soft start circuit to reduce the impact of the start process on the driver.
The power drive unit first rectifies the input three-phase or mains through the three-phase full-bridge rectifier circuit to obtain the corresponding direct current. The three-phase permanent magnet synchronous AC servo motor is driven by the three-phase sinusoidal PWM voltage inverter after the rectified three-phase power or mains. The whole process of the power drive unit can be simply said to be the AC-DC-AC process. The main topological circuit of the rectifier unit (AC-DC) is the three-phase full-bridge uncontrolled rectifier circuit.
The role of the servo driver: The servo driver is to drive the servo motor to generate power and normal operation of the equipment, its function is divided into many kinds, and with the different functionality of the brand is not the same. The servo motor functions similar to Kefeng Automation are relatively more, and there are roughly the following aspects:
1, regeneration and dynamic braking function;
2, quick stop instant power failure protection function;
3, absolute value system voltage monitoring, low voltage warning function;
4, grouping parameter setting, online switch any control mode;
5, parameter management, monitoring, oscilloscope power can support software debugging.
6, control power AC input, configurable wide voltage input;
The company focuses on DCS, PLC, robot, large servo four systems
The main products are various modules/cards, controllers, touch screens, servo drivers
Company advantage: Supply imported original products, professional production of spare parts
One year warranty, fast delivery time, complete supply !！！
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