Rexroth frequency converter from Germany

1、 Working principle of VFC 5615 (high-performance vector type)

-Core architecture: AC-DC-AC+FOC vector control (magnetic field orientation)

1. Rectification: three-phase 380V → rectifier bridge → DC bus

2. Filtering: Capacitor/Reactor → Smooth DC

3. Inverter: IGBT converts DC to variable frequency and transforms three-phase output

4. Control: High speed MCU realizes vector closed-loop/open-loop, accurately decoupling torque and magnetic flux

-Control mode

-SVC (sensorless vector): asynchronous/synchronous motor, output 200% torque at 0.5Hz

-FOC (Closed Loop Vector): Equipped with an encoder, speed accuracy of ± 0.01%, and extremely fast dynamic response

-V/f: Compatible with ordinary asynchronous motors

-Torque control/speed control: choose one or the other

-Core advantages

-0.5Hz can output 200% rated torque, low-speed high torque

-Speed range 1:200, high precision

-Supports asynchronous and permanent magnet synchronous motors, one machine for multiple purposes

2、 Core technical parameters

Electrical specifications

-Power range: 0.4kW~400kW (three-phase 380V)

-Input voltage: 323-528VAC, 3P, 50/60Hz

-Output frequency: 0-300Hz (expandable)

-Carrier frequency: 0.4-30kW: 1-15kHz; 37kW+：1～12kHz

-Overload capacity: Heavy load 150%/60s; Light load 120%/60s

-Braking: ≤ 30kW built-in braking unit; ≥ 37kW external connection

-EMC: ≥ 132kW with built-in C3 filter; The entire series supports C2/C3

-DC reactor: ≥ 132kW built-in

control performance

-Starting torque: 0.5Hz/200% (SVC); 1.5Hz/100%（V/f）

-Speed range: SVC: 1:200; V/f：1:50

-Speed accuracy: closed-loop ± 0.01%; Open loop ± 0.5%

-Torque response:<10ms (closed-loop)

🧩 Interface and Communication

- Standard I/O: 4DI, 2DO, 2AI, 1AO, RS485 (Modbus-RTU)

-Expansion slots: 2, supporting Profibus DP, CANopen, DeviceNet, CC Link, Ethernet, etc

-Operation panel: standard LED; Optional LCD/Bluetooth/cabinet door installation

Environment and Structure

-Protection: IP20 (installed inside the cabinet)

-Cooling: ≤ 1.5kW without fan; ≥ 1.5kW independent air duct

-Installation: Seamless side by side, saving space

-Temperature: -10 ℃ to+40 ℃ (without reducing capacity); +50 ℃ capacity reduction

-Altitude: ≤ 1000m without capacity reduction; Reduce capacity by 1% for every 100m increase

3、 Typical applications

CNC machine tools, extruders, winding, printing, packaging, metal processing, mixing, and lifting equipment

The working principle of the German ReXROTH frequency converter is mainly to adjust the speed of the driving motor by converting the power frequency.

The specific process is as follows: the rectifier converts AC power into DC power to supply to the inverter; Filtering can effectively remove pulsations and ripples in DC electrical signals, making the output voltage more stable and reliable; The control circuit is responsible for monitoring the input and output currents as well as frequency, and adjusting the output frequency by controlling the switching elements of the inverter.

The German ReXROTH frequency converter is a motor control device that integrates frequency conversion technology and microelectronics technology. Its characteristics and functions mainly include:

Energy saving: The frequency converter can adjust the power supply voltage and current of the motor according to actual needs, ensuring that the motor operates in good condition and effectively reducing energy consumption.

Speed regulation: By changing the working power frequency of the motor, stepless speed regulation can be achieved to meet the precise requirements of various production processes for motor speed.

Soft start: Reduce the impact of starting current on the power grid and further promote energy conservation.

Automation control: When the frequency converter and sensors work together, it can achieve closed-loop control of the motor, further improving the automation level of the motor.

Motor protection: Equipped with multiple protection functions, such as overcurrent, overvoltage, and overload protection, providing comprehensive protection for the motor.

Reduce the impact on the power grid: With the precise control of the frequency converter, the starting current of the motor can steadily increase, significantly reducing the impact on the power grid and ensuring the stable operation of the power grid.

Centralized control function: Some frequency converters have networking capabilities, allowing multiple frequency converters to be centrally controlled and managed.

Efficiency improvement: It can maintain the motor in excellent working condition, reduce faults and downtime, and thereby improve production efficiency. At the same time, it can also reduce the wear and friction of mechanical transmission components, thereby extending the service life of the equipment.

Quality assurance: By controlling the motor speed, the frequency converter can ensure stable operation of the motor at a specific speed, thereby ensuring the manufacturing quality of the product. A stable rotational speed helps maintain consistency and stability in the production process.

In summary, the German ReXROTH frequency converter plays an important role in the field of industrial automation. It can not only improve production efficiency and product quality, but also achieve efficient energy utilization and long-term stable operation of equipment.

Rexroth frequency converter is a motor control device that integrates frequency conversion technology and microelectronics technology. It controls AC motors by changing the operating power frequency of the motor. The following is information about the use and maintenance of Rexroth frequency converters in Germany:

Precautions for use

Installation environment: Ensure that the frequency converter is installed in a well ventilated, dry, and clean environment, avoiding direct sunlight and high temperatures.

Power supply voltage: Confirm that the input power supply voltage is consistent with the rated voltage of the frequency converter to avoid excessive voltage fluctuations.

Grounding protection: Connect the grounding terminal of the frequency converter correctly to ensure that the grounding resistance meets safety requirements.

Cooling measures: Regularly clean the dust in the cooling channel of the frequency converter to ensure the normal operation of the cooling system.

Avoiding electromagnetic interference: Reasonable wiring to avoid signal interference between the frequency converter and other devices.

maintenance

Regular inspection: Regularly check the various functions and parameter settings of the frequency converter to ensure that it is in good condition.

Cleaning and dust removal: Regularly clean the surface and internal dust of the frequency converter to prevent dust accumulation from affecting heat dissipation.

Functional testing: Regularly conduct functional tests, such as overload, overvoltage, undervoltage and other protection function tests, to ensure their reliability.

Record logs: Detailed records of the time, content, and issues discovered during each maintenance for future reference.

Common faults and their solutions

Overload: Check if the motor load exceeds the rated value, adjust the load or increase the motor capacity.

Overcurrent: Check if the input power supply voltage is normal and troubleshoot circuit faults.

Overvoltage: Check if the braking unit is working properly and adjust the braking resistor.

Undervoltage: Check if the input power supply voltage is too low to ensure stable power supply.

Overheating protection: Check if the cooling system is blocked or faulty, and clean the cooling channels.

Not displaying: Check if the power cord connection is loose, replace the display screen or motherboard.

There is input but no output: Check if the input and output terminals are connected correctly and troubleshoot internal circuit faults.

Phase loss: Check if the input power supply is missing phase and repair the power supply circuit.

Trip upon power on: Check for short circuit or overload and investigate the cause of the fault.

In summary, when using Rexroth frequency converters from Germany, please strictly follow the operating procedures and precautions, and perform regular maintenance and upkeep. If encountering a malfunction, please diagnose and handle it promptly to ensure the normal operation of the equipment and extend its service life.

Dongguan Guanglian Automation Technology Co., Ltd. has a good market reputation, a professional sales and technical service team, and has won the support of domestic and foreign manufacturers based on years of business experience, familiarity with and understanding of market trends. Our company has become a fixed supplier and domestic trading partner for many large, medium, and small enterprises, striving to become one of the companies in the industry.