The use of silicon carbide as a converter has great potential for energy saving

In the machinery and equipment of modern factories, the electric energy consumed by the electric drive system accounts for 60%~70%. With the continuous rise of energy prices, the proportion has continued to rise, and in fact, the potential for energy saving. Very large, the use of energy-saving transmission systems can reduce more energy consumption for mechanical equipment.

Ms. Xiao Fang, manager of frequency converter product management department of Siemens industrial automation and drive technology group's standard drive department, said that the advantages of adopting energy-saving drive system are obvious, reduce energy loss, increase production efficiency and reduce environmental pollution, and energy-saving effect can be achieved. Throughout the entire life cycle of machinery and equipment, “the more energy-intensive industries are, the more effective this energy-saving effect becomes.”

Ms. Xiao Fang stated that there are many places where energy saving can be implemented in the operation of machinery and equipment: the operation of pumps and fans will adjust the flow rate according to need, the mechanical equipment operation will play a part of useless work, and the motor does not need to work at high speed and full load for a long time. The use of variable frequency speed regulation can produce a very considerable energy-saving effect, and it has also become a widely used energy-saving method."

“Using frequency converters to adjust the motor, fan and water pump control methods can easily achieve energy-saving effects.” Ms. Xiao Fang said that the use of frequency conversion equipment can reduce maintenance and service costs, and further increase business productivity. At the same time, it can also smoothly start the equipment to slow inertial operation and extend the life cycle of the equipment.

In fact, there are many applications for frequency converters. For example, in a textile machinery production line, in addition to adjusting the motor operating speed of the production line, the inverter can also perform constant temperature and humidity control on the production environment. This change in the process flow not only improves the production quality, but also reduces the occurrence of failure rates. Objectively, it also reduces energy waste.

Siemens frequency converter has been dedicated to helping customers to achieve more effective energy-saving, such as SINAMICS G120 inverter, with a renewable energy feedback function, can achieve 100% energy feedback. At the same time, the application of such a frequency converter can also save some auxiliary components such as line reactors and braking resistors, reduce the installation space of the transmission system, and reduce the heat dissipation.

Ms. Xiao Fang believes that for the energy saving of the factory, energy conservation must be viewed from the entire chain of the system. The energy saving of a mechanical device and a production workshop is not only simple with a frequency converter and a high-efficiency motor, but also requires full energy saving. Considering the energy-saving implementability of each node, the entire system can have better energy-saving effects.

People tend to ignore some details about energy conservation. In fact, for a factory, energy saving is not just about reducing electricity consumption, but also staffing, wiring, and layout of factory space. Energy conservation is a very broad concept. "From the power supply and transformer equipment, to the upper control system, drive system and transmission system, and then to the actuator, every detail has great potential for energy conservation. Only every point is coordinated to achieve good overall energy efficiency. The effect.” Ms. Xiao Fang said that Siemens’ use of distributed frequency converters for distributed I/O systems, such as SIMATIC ET200SFC and SINAMICS G120D, can help customers save some manpower in space layout, installation methods, wiring methods and maintenance. Materialism is a very good energy-saving application product.

Ms. Xiao Fang believes that with the development of economy, people's awareness of energy conservation has been greatly improved, but it is still far from being sufficient in comparison with developed countries. It still requires the state to introduce legislation to further stipulate: “Inverter as an example, energy saving The remarkable effect of this is no doubt, but the main factor that determines whether to make a deal when the company purchases energy-saving equipment is the purchase cost, not the operating cost.

This concept also requires the country to issue a corresponding policy to force the energy efficiency indicators of the equipment before it can be changed. ”

“For Siemens, innovation is our unremitting goal. We will continue to strengthen local R&D and production efforts to fully meet the needs of the Chinese market: For example, SINAMICS G120 inverters have innovatively adopted silicon carbide as a material for frequency converters. With high resistance to high temperatures, the frequency converter's switching frequency can be increased with less energy loss. Similar to the innovative way of SINAMICS G120 inverters, Siemens will continue to strengthen."

Ms. Xiao Fang believes that with the development of China’s economic market, more and more companies will consider long-term development. When investing, companies will pay more attention to the investment of inverters and high-efficiency motors, and consider adding the entire system. Energy-saving ranks.