Description
Servo system is a closed-loop automatic control system with feedback. It is composed of a controller, a power drive device, a feedback device and a motor. Single control and combination control of position, speed and torque can be carried out by using servo mechanism Torque control: through the external analog input or direct address assignment to set the size of the motor shaft output torque, mainly used in the need for strict control of torque occasions. -- Current loop control Speed control: Control of rotation speed by analog input or pulse frequency. -- Speed environmental control Position control: the most commonly used control in servo, position control mode is generally through the external input pulse frequency to determine the size of the rotation speed, through the number of pulses to determine the rotation Angle, so it is generally used in positioning devices. -- Three-ring control The main indexes to measure the performance of servo control system are frequency band width and precision. The frequency band width is referred to as bandwidth, which is defined by the frequency response characteristics of the system and reflects the rapidity of the tracking of the servo system. The greater the bandwidth, the better the speed. The bandwidth of the servo system is mainly limited by the inertia of the control object and the actuator. The greater the inertia, the narrower the bandwidth. Servo system accuracy refers to the accuracy of the output to reproduce the input signal, in the form of error, can be summarized as dynamic error, steady state error and static error of three aspects.
A variable frequency driver is a type of electronic controller designed to change the frequency and voltage supplied to an AC motor, which will result in changes in the speed of the motor as required. The VFD can simply or rotate the speed and voltage of the up and down motor to meet speed and torque requirements.
In order to control the speed of the motor, the inverter controls the frequency of electrical energy supplied to it. The frequency (or Hertz) is directly related to the motor speed (RPM). The faster the frequency, the faster the speed of the motor. As the motor speed requirements of the application change, the VFD can simply turn the motor speed up or down to meet the speed requirements, ultimately saving energy.
Variable frequency drives can be used on ships to run ventilation systems, pumps, conveyors and machine tool drives for bow thrusters, azipod systems and more. Other names for VFD are variable speed drive, adjustable speed drive, adjustable frequency drive, etc.
These are the main modules of the variable frequency drive:
Rectifier: Used to change the input AC power to direct current. Different designs can be used, which are selected according to the desired performance of the VFD
Intermediate circuit: The rectified DC power supply is then regulated in the intermediate circuit by a combination of inductors and capacitors.
Inverter: Used to convert rectified and regulated DC back to a variable frequency and voltage AC power supply
Control unit: The controller monitors and controls rectifiers, intermediate circuits, and inverters to provide the correct output in response to external control signals. The entire process is controlled by a microprocessor that monitors the following: input power supply voltage, speed set point, DC bus voltage, output voltage and current to ensure that the motor is operating within the established parameters.
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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