Fans, pumps and compressors use electric motors to provide motion; therefore its energy consumption is strongly influenced by the efficiency of motor. According to IEC 60034-30, efficiency of motors are categorized as follows (IE stands for international efficiency).
- IE1: Standard efficiency
- IE2: High efficiency
- IE3: Premium efficiency
- IE4: Super-Premium efficiency
In Japan, three-phase induction motors with wide variety of usages, are being converted to those with IE3 and higher standards. Nameplate rotational speed of motor, starting current and torque tends to increase with improved efficiency, which may necessitate equipment to adjust rotational speed, optimize circuit breakers and electromagnetic switches, optimize mechanical strength of auxiliary devices such as breaks (if connected)
Ministry of Economy, Trade and Industry
Converting fans, pumps and compressors from models equipped with IE1 motors to models equipped with IE3 motors can lower energy consumption by several per cent, depending on nameplate output capacity.
Lower losses also means lower increase in temperature, leading to longer lifetime and higher reliability.
Difference in efficiency between IE1 and IE3 motors can be up to 20 per cent, depending on nameplate output capacity.
About one week, depending on the size.
Ministry of Economy, Trade and Industry, Japanmeti_low-carbon-technology@meti.go.jp
Ministry of Economy, Trade and Industry, Japan
Ministry of Economy, Trade and Industry