FRAKO controller, German FRAKO model, FRAKO price

FRAKO controller is a type of controller used to control servo motors. Its function is similar to that of a variable frequency drive acting on a standard AC motor. It is part of the servo system and is mainly applied in high-precision positioning systems. Generally, servo motors are controlled via position, speed, and torque to achieve high-precision positioning of the transmission system, making it a high-end product in transmission technology. Servo drives are an important component of modern motion control and are widely used in automated equipment such as industrial robots and CNC machining centers. In particular, servo drives for controlling AC permanent magnet synchronous motors have become a research hotspot both domestically and internationally. Current AC servo drive designs commonly adopt a 3-loop control algorithm for current, speed, and position based on vector control. The rationality of the speed loop design in this algorithm plays a key role in the performance of the entire servo control system, especially in speed control.

FRAKO Controller Introduction

In the speed closed loop of a servo drive, the real-time measurement accuracy of the motor rotor speed is crucial for improving the static and dynamic characteristics of speed control. To balance measurement accuracy and system cost, incremental optical encoders are generally used as speed sensors, with the corresponding common speed measurement method being the M/T method. Although the M/T method offers certain measurement accuracy and a wide measurement range, it has inherent defects, including: 1) At least one complete code disk pulse must be detected within the speed measurement cycle, which limits the minimum measurable speed; 2) The 2 control system timer switches used for speed measurement are difficult to keep strictly synchronized, making it impossible to guarantee speed measurement accuracy in applications with significant speed variations. Therefore, traditional speed loop designs using this method struggle to improve the speed following and control performance of servo drives.

FRAKO Controller Principle

Currently, mainstream servo drives use digital signal processors (DSP) as the control core, enabling complex control algorithms and achieving digitization, networking, and intelligence. Power devices commonly use drive circuits designed around intelligent power modules (IPM). The IPM integrates the drive circuit and includes fault detection and protection circuits for overvoltage, overcurrent, overheating, and undervoltage. A soft-start circuit is also added to the main circuit to reduce impact on the drive during startup. The power drive unit first rectifies the input three-phase power or mains electricity using a three-phase full-bridge rectifier circuit to obtain the corresponding DC power. The rectified three-phase power or mains electricity is then converted by a three-phase sinusoidal PWM voltage-source inverter to drive the three-phase permanent magnet synchronous AC servo motor. The entire process of the power drive unit can be simply described as AC-DC-AC. The main topology of the rectifier unit (AC-DC) is a three-phase uncontrolled full-bridge rectifier circuit. With the large-scale application of servo systems, the use, debugging, and maintenance of servo drives have become important technical topics. More industrial automation service providers are conducting in-depth technical research on servo drives. Servo drives are an important component of modern motion control and are widely used in automated equipment such as industrial robots and CNC machining centers. In particular, servo drives for controlling AC permanent magnet synchronous motors have become a research hotspot both domestically and internationally. Current AC servo drive designs commonly adopt a 3-loop control algorithm for current, speed, and position based on vector control. The rationality of the speed loop design in this algorithm plays a key role in the performance of the entire servo control system, especially in speed control.

FRAKO Controller Features and Applications

Servo drives are widely used in injection molding machines, textile machinery, packaging machinery, CNC machine tools, and other fields. Servo controllers can easily switch between operation modules and fieldbus modules via automated interfaces. Different fieldbus modules are used to implement different control modes (RS232, RS485, fiber optic, InterBus, ProfiBus), whereas general-purpose variable frequency drives have relatively single control methods. Servo controllers connect directly to resolvers or encoders to form closed loops for speed and displacement control. In contrast, general-purpose variable frequency drives can only form open-loop control systems. The control indicators of servo controllers (such as steady-state accuracy and dynamic performance) are superior to those of general-purpose variable frequency drives.

Weidou Intelligent Technology specializes in selling German FRAKO servo drives, FRAKO servo amplifiers, FRAKO programmable controllers, FRAKO control units, FRAKO industrial PCs, FRAKO logic controllers, FRAKO drum controllers, FRAKO relay controllers, FRAKO control systems, FRAKO motion controllers, FRAKO microcontrollers, FRAKO control modules, FRAKO control switches, FRAKO servo controllers, and FRAKO expansion modules. FRAKO products are original imports from Germany. Customers are welcome to inquire and place orders.