How to maximize the effectiveness of energy-saving electric motors: This means that reading the maximum energy-saving value from the motor nameplate is not a good thing.
Although environmental protection can attract widespread attention from individuals and the public, making business decisions is powerless. The company needs better business reasons to purchase and install electric motors, and strives to save power to make the project more cost-effective. It is best to install more energy-saving motors to reduce energy consumption. The new motor efficiency standards in the United States have been implemented since December 19, 2010, and the use of energy-saving motors has become a regulation.
For energy-saving motors, you must understand that the term actually refers to traditional structured motors with rotors and excitation windings. David Hansen, Global Product Manager for Kinetix Motion Control at Rockwell Automation, said, "Induction motors can be made into different types of standard energy efficiency, high energy efficiency, and ultra-high energy efficiency, but permanent magnet motors cannot.
Due to the absence of additional electrical energy to generate the stator magnetic field, the structure of permanent magnet motors naturally becomes more efficient. AC induction motors have a complete product line that can meet the requirements of Tables 12-12 and 12-13 in NEMA mg 1 (NEMA Ultra High Energy Efficiency), as well as the requirements of IE3 in IEC 60034-30, balddelectric
Therefore, we will only discuss induction motors with ferromagnetic cores and stator coils. We will discuss the energy efficiency characteristics of permanent magnet motors later.
Malinowski continued, "Compared to old-fashioned motors, ultra efficient motors have lower tolerances, less heat generation, less vibration, are quieter, and more durable." In addition, Peter Fischbach, Industrial Manager at Bosch Rexroth, said, "Nowadays, the efficiency of AC induction motors can be achieved. By using new slots and winding geometries, better iron core materials, and copper rotors, energy conversion paths and physical performance can be improved
What makes the motor more efficient?
Malinowski said, "The key to improving efficiency is to reduce losses." More copper can reduce stator losses, while higher grade silicon steel can reduce losses on the iron core. Less loss means lower power is required for cooling, which also reduces losses. The losses are mainly caused by conduction losses on the stator and rotor, as well as losses on the iron core itself, which are also known as iron core losses or hysteresis losses, "Fischbach added.
server