As a high-performance drive control system, SINAMICS S120 integrates three functions: V/F control, vector control and servo control. It can not only easily control ordinary three-phase asynchronous motors, but also accurately control synchronous motors, torque motors and linear motors. As a Siemens SINAMICS M1-level product, its excellent performance is evident.
S120 product features
“Highly flexible” modular design
It allows units of different power levels and control performance to be freely combined, and each system component shows a high degree of compatibility. In addition, through simple parallel operation, power can be easily increased.
“One network to the end” communication technology
This product supports the standard PROFIBUS DP fieldbus and the new generation of high-speed industrial Ethernet technology PROFINET, which is easy to integrate with the factory IT environment. At the same time, the unique DRIVE-CLiQ communication method is used between its drive components to ensure efficient data transmission.
“One heart for multiple purposes” multi-machine control technology
One control unit can synchronously control up to four inverters and one rectifier, and all required data are stored in the control unit, realizing convenient control of inter-axis connection and efficient and reliable operation of the system.
Intelligent drive component link – DRIVE-CLiQ
This technology adopts the “circulation-free design” of parallel connection of devices, so that when parallel connection is increased, only the shortest motor cable requirements need to be met, without the need for additional bulky and expensive balancing reactors or output reactors.
“IGBT intelligent rectification” for four-quadrant operation
Ensures that the device can still operate stably in the case of installed cabinets.
Book design
The product is designed as a compact book type with a small footprint, which is convenient for users to flexibly arrange and save space.
Modular design
The product adopts modular construction, so that each component can be flexibly combined and disassembled to meet the different needs of users.
S120 book system configuration
The system adopts modular design and is presented in a book structure, so that each component can be easily combined and disassembled, so as to flexibly respond to the different configuration needs of users.
Detailed explanation of each module of the S120 book-type system
The control unit CU320-2, as the core component of the S120 book-type system, is designed to perform the communication and open-loop and closed-loop control functions of the motor module and the power module. Its multi-axis drive capability enables the system to flexibly adapt to various complex industrial application scenarios.
The Line Module (LM) rectifier module plays an important role in providing DC power to the DC bus in the S120 book-type system. In addition, the SLM and ALM modules in the system can effectively feed back the regenerative energy to the power grid to achieve efficient energy utilization. Among them, BLM, as a basic power module, provides the basic power supply requirements of the system; while SLM and non-regulated power modules need to be used with corresponding line reactors; ALM, as a regulated power module, needs to be equipped with a special interface module to ensure the stable operation of the system.
The inverter module in the Line Module (LM), also known as MoMo, is responsible for efficiently converting DC power into three-phase AC power, thereby providing the required power for the motor. Depending on the configuration, the module can be divided into a single motor module (Single MoMo) and a double motor module (Double MoMo) to meet different application requirements.
In the event of a power failure, such as emergency reversal or emergency stop category 1, a brake module and its matching external brake resistor are required to ensure that the drive system can stop smoothly or to limit the DC bus voltage during short braking (especially when the regenerative feedback function of the power module is disabled). The brake module contains power electronics and corresponding control circuits. During operation, the electrical energy on the DC bus is converted into heat energy by the external brake resistor for dissipation. It is worth mentioning that the brake module works automatically.
The role of the capacitor module is to increase the capacity of the DC bus capacitor, thereby effectively buffering possible momentary power failures.
The book-type control power module has an integrated potentiometer for flexible adjustment of the grid or DC bus voltage. Its output voltage range is DC 24 V to 28.8 V. The module can work alone or in parallel with other modules, with a total capacity of up to 10 modules.
Dimensions of the S120 Booksize Module
The module is compact and has a moderate width, which allows for flexible deployment in a variety of application scenarios.
Installation Order of the S120 Booksize Module
When installing the S120 Booksize Module, multiple factors need to be considered, especially the current carrying capacity of the DC busbar and the functions of the components. To ensure the stability and performance of the system, the following components should be placed in the order from left to right: power module, motor module (sorted by power size, from largest to smallest), and DC bus components such as brake module, control power module and capacitor module. Following this order ensures that the module system can operate efficiently and stably.
S120 Application Cases
In the process industry, the S120 module system is often used to drive various equipment, such as simple pumps and fans. At the same time, it is also widely used in demanding independent drives such as centrifuges, presses, extruders, etc. In addition, the S120 module system is also often used in combined drives in textile equipment, film plastics and papermaking equipment, and steel rolling equipment. It is particularly worth mentioning that it plays an important role as a high-precision servo drive in wind power generation equipment.