The use of frequency converters can improve the energy saving space of industrial motors

In the future, the energy-saving potential of high-efficiency motors will have a broader market. Generally speaking, the energy saving of speed-controlled motors must be achieved with the help of frequency converters. It can be said that its energy-saving effect is mainly reflected in the use of frequency converters. High-efficiency motors themselves have partial energy-saving effects.

Since the United States promoted high-efficiency motors in the form of law (EPAct) in October 1997, the research, development, production and application of high-efficiency motors have been promoted worldwide. In 1999, the European Union proposed the CEMEP-EU agreement, which divided motor efficiency into EFF3, EFF2 and EFF13 levels, and specifically stipulated a timetable for promoting high-efficiency motors. Countries around the world have also formulated their own high-efficiency motor standards. Among them, Canada, Mexico, Brazil and other countries have adopted the US EPAct standard, Australia, New Zealand, India and other countries have adopted the CEMEP-EU agreement, and my country has also formulated the national standard GB18613-2006 "Energy efficiency limit values ​​and energy efficiency grades for small and medium-sized three-phase asynchronous motors" based on the CEMEP-EU agreement. This shows that high-efficiency motors will play a very important role in the future energy-saving market.

Lenze is also currently vigorously promoting its own high-efficiency motors. In addition, Lenze's motors (such as the MDxMA series motors) all support the application of 87Hz technology. After using 87Hz technology, the machine efficiency is improved and the system energy saving is reduced. Because the rated speed of the 87HZ motor is increased, while the slip is unchanged, the proportion of slip in the rated speed is reduced. Experimental data shows that by increasing the motor operating frequency to 87Hz, the motor efficiency can be increased by about 5%.

Lenze's MHXMA series of three-phase asynchronous motors that meet the IE2 standard are high-efficiency motors with small size, light weight, and efficiency indicators that meet the European IE2 standard. Compared with IEC standard products, this series of motors can enable equipment manufacturers and end users to obtain higher output power, making it an ideal choice for energy-saving products.

In fact, in addition to the motor itself, if it is used together with the Lenze reducer, its efficiency will be higher. The Lenze reducer series are all efficient hard-tooth reducers. The optimized gear design ensures that the Lenze reducer runs quietly and efficiently. Compared with the same type of reducers, the Lenze reducer has a smaller backlash, and the transmission is more precise, efficient and reliable. Among them, the right-angle shaft

Energy saving of reducers, such as GKR series reducers, with an operating efficiency of about 95%.

At present, the inverter has been fully integrated into the energy-saving control system and used as an integral part of the energy-saving control system. For example, in the variable flow energy-saving control system of the inverter of the water pump or fan, the inverter, motor and water pump or fan form an integrated component to achieve the effect of energy saving.

In addition to conventional inverter speed regulation applications, Lenze's new 8400 series inverters also have a built-in VFCEco energy-saving algorithm, which enables them to save more energy under partial load operation, up to 30% of energy.