PERMA controller, German PERMA model, PERMA price

PERMA 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. Servo motors are generally controlled via position, speed, and torque modes 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. Servo drives applied to control AC permanent magnet synchronous motors have become a research hotspot both domestically and internationally. Current AC servo drive designs commonly adopt current, speed, and position 3 closed-loop control algorithms based on vector control. In this algorithm, the rationality of the speed closed-loop design plays a key role in the entire servo control system, particularly in the performance of speed control.

PERMA Controller Introduction

In the servo drive speed closed loop, the real-time measurement accuracy of the motor rotor speed is crucial for improving the static and dynamic characteristics of speed control in the speed loop. 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 period, which limits the minimum measurable speed; 2) The 2 control system timer switches used for speed measurement cannot strictly maintain synchronization, making it impossible to guarantee speed measurement accuracy in applications with significant speed variations. Therefore, traditional speed loop design schemes using this speed measurement method struggle to improve the speed following and control performance of servo drives.

PERMA Controller Principle

Currently, mainstream servo drives use a Digital Signal Processor (DSP) as the control core, enabling complex control algorithms and achieving digitization, networking, and intelligence. Power devices commonly use driver circuits designed around Intelligent Power Modules (IPM). The IPM integrates driver circuits 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. An increasing number of 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. Servo drives applied to control AC permanent magnet synchronous motors have become a research hotspot both domestically and internationally. Current AC servo drive designs commonly adopt current, speed, and position 3 closed-loop control algorithms based on vector control. In this algorithm, the rationality of the speed closed-loop design plays a key role in the entire servo control system, particularly in the performance of speed control.

PERMA 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 speed and displacement closed loops. In contrast, general-purpose variable frequency drives can only form open-loop control systems. The various 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 PERMA servo drives, PERMA servo amplifiers, PERMA programmable logic controllers, PERMA control units, PERMA industrial PCs, PERMA logic controllers, PERMA drum controllers, PERMA relay controllers, PERMA control systems, PERMA motion controllers, PERMA microcontrollers, PERMA control modules, PERMA control switches, PERMA servo controllers, and PERMA expansion modules. PERMA products are original imports from Germany. Customers are welcome to inquire and place orders.