Description
GHR9010100R0002 PLC (Programmable Logic Controller) is a device widely used for machine control. It is a digital electronic device that can be programmed to perform various control tasks, such as starting, stopping, motion control, sensor monitoring, etc. The GHR9010100R0002 PLC typically includes a central processing unit, input/output modules, programming software, and communication interfaces. The CPU is responsible for executing the programming instructions and controlling the operation of the input/output modules. Input/output modules are used to connect sensors, actuators and other devices to achieve control of the machine. GHR9010100R0002 PLC has a high degree of reliability and stability, and can be programmed to adapt to different application scenarios. It is widely used in the control of various machines and equipment, such as industrial robots, automated production lines, elevators, traffic signal control and so on.
2.1 Power drive unit The power drive unit first rectifies the input three-phase power through the three-phase full bridge rectifier circuit to obtain the corresponding direct current, and then converts the inverter into controllable alternating current to drive the servo motor. 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. 2.2 Control Unit The control unit is the core of the whole AC servo system, which realizes the system position control, speed control, torque and current controller. In addition to fast data processing capabilities, the digital signal processor (DSP) also integrates A wealth of application-specific integrated circuits for motor control, such as A/D converter, PWM generator, timing/counter circuit, asynchronous communication circuit, CAN bus transceiver, high-speed programmable static RAM and large capacity program memory. 2.3 Drive control Mode (1) PWM control (Shadik driver) PWM control technology: control the on-off and off-off of semiconductor switching devices, so that the output end can get a series of pulses with equal amplitude and unequal width, and use these pulses to replace sine waves or other required waveforms. By modulating the width of each pulse according to certain rules, the output voltage of the inverter circuit can be changed, and the output frequency can be changed.
Advantages:
1) Low noise;
2) High efficiency at full load and can work in continuous conduction mode;
3) The ripple voltage is small;
4) The switching frequency is fixed, so the noise filter design is easier and the noise elimination is simpler;
5) The control method is easy to implement.
Cons:
1) Due to the influence of the error amplifier, PWM loop gain and response speed are limited, PFM has a fast response speed;
2) PWM is less efficient at low load.
3) PFM control (Panasonic Drive)
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 !！！ ① 24 hours email response (12 hours); ② For shipment outside Asia, please contact the seller.
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