Inverters can also implement various control methods, such as open-loop control and closed-loop control. Open-loop control is simple and easy to implement, but has lower accuracy; closed-loop control has high accuracy, but requires feedback signals and the control circuit is more complex. The selection of an inverter should be based on the characteristics of the load, such as the type of load (constant torque or variable torque load), the load size, and torque characteristics. Factors such as the operating environment, installation method, and capacity should also be considered.
Siemens frequency converters are a well-known brand developed, manufactured, and sold by Siemens AG of Germany. They are primarily used for controlling and regulating the speed of three-phase AC asynchronous motors. Their stable performance, rich combination functions, high-performance vector control technology, low-speed high-torque output, excellent dynamic characteristics, superior overload capacity, innovative BiCo (internal functional interconnection) function, and unparalleled flexibility have secured them a significant position in the frequency converter market.
Siemens frequency converters were first used in the steel industry in the Chinese market. However, at that time, motor speed regulation was still mainly based on DC speed regulation, and the application of frequency converters was still an emerging market. But with the continuous development of electronic components and the continuous maturation of control theory, frequency conversion speed regulation has gradually replaced DC speed regulation and become the mainstream of drive products. Siemens frequency converters have achieved extraordinary development in this huge Chinese market due to their strong brand effect.
The MicroMaster 420 is a new generation of modular, multi-functional standard frequency inverters from Siemens. It features a user-friendly interface, making installation, operation, and control more flexible and convenient. Utilizing the latest IGBT technology, it boasts powerful communication capabilities, excellent control performance, and high reliability, making control simpler and more enjoyable.
The MicroMaster 420 frequency inverter boasts a variety of functions and control capabilities to meet the needs of diverse fields. It employs advanced vector control technology, enabling high-precision speed and torque control, suitable for various types of loads and drive systems. Furthermore, the MicroMaster 420 features energy-saving and environmentally friendly functions, optimizing energy utilization and reducing environmental impact.
The MicroMaster 420 frequency inverter features a user-friendly interface and simple operation, allowing for quick parameter setting and commissioning. It also boasts multiple communication interfaces and protocols, enabling seamless integration with other industrial automation systems. Furthermore, the MicroMaster 420 offers high reliability and stability, enabling stable operation in various harsh working environments.
1. Main features
200V-240V±10%, single-phase/three-phase, AC, 0.12kW-5.5kW; 380V-480V±10%, three-phase, AC, 0.37kW-11kW; modular structure design, providing maximum flexibility; standard parameter access structure, easy to operate.
2. Control Functions
Linear V/f control, squared V/f control, programmable multi-point settable V/f control; flux current control (FCC) to improve dynamic response characteristics; the latest IGBT technology, digital microprocessor control;
It features 3 digital inputs, 1 analog input, 1 analog output, and 1 relay output; an integrated RS485 communication interface with optional PROFIBUS-DP communication module/Device-Net template; 7 fixed frequencies and 4 jump frequencies, all programmable; and a "capture restart" function.
It has an "automatic restart" function in case of power failure or malfunction;
A flexible ramp function generator with smoothing properties for the start and end segments;
Fast current limiting (FCL) prevents unnecessary tripping during operation;
There are DC braking and combined braking methods to improve braking performance;
BiCo technology is used to enable free connection of I/O ports.
3. Protection Functions
The overload capacity is 150% of the rated load current for 60 seconds.
Overvoltage and undervoltage protection;
Inverter over-temperature protection;
Ground fault protection, short circuit protection;
I2t motor overheat protection;
Motor overheat protection using PTC digital input;
Parameter interlocking is achieved using PIN numbers;
Motor lockout protection to prevent stalling.
The SINAMICSS120 is a high-performance, modular motion control drive suitable for high-performance drive applications in mechanical and systems engineering. It offers a wide range of components and functions, allowing it to be used as a comprehensive motion control drive system, including high-performance single-axis drives and multi-axis drives with a common DC bus. These drives feature vector control or servo control, providing tailored high-performance drive solutions.
The SINAMICSS120 motion control drive is characterized by its flexibility and ability to improve production efficiency. It features an innovative system architecture and digital communication capabilities, and provides innovative tools that make configuration and commissioning processes more efficient. Furthermore, the SINAMICSS120 offers a wide power range, from 0.12kW to 4500kW, and is available in various structural forms and cooling methods to meet the needs of diverse applications.
1. Highlights Introduction
Servo drives are the ideal foundation for modular systems and machine designs.
Innovative system architecture and digital communication capabilities
It features multiple control modes and drive-specific process functions.
Built-in security features
Efficient configuration and rapid commissioning using SIZER and STARTER.
Automatic configuration and automatic optimization
Achieving integrated solutions through Totally Integrated Automation (TIA)
Achieving SINAMICS integration down to the automation level
2. Technical Data
The rating depends on the design and type of the motion control drive.
The rating depends on the design and type of the motion control drive.
3. Voltage and power range
0.12-4500kW 230V, 380-480V and 500-690V (50/60Hz)
4. Control Principle
V/f open-loop control
Vector control, servo control with/without encoder, SINAMICSS120 – Typical Applications
Whether for continuous conveyor lines or synchronous and highly dynamic processes, Siemens' high-performance drive products serve a wide range of industrial applications. These applications include: packaging machines, printing presses, lifting equipment, plastics machinery, rolling mills and test benches, textile machines, machine tools, paper machines, and conveying and assembly systems.
