What are the criteria for measuring high-efficiency motors ? How much energy can they save?
When choosing a geared motor, you may encounter three different energy efficiency levels. What are the differences between these motors? How much do their energy consumptions differ? What should you pay attention to when choosing one?
There are three main energy efficiency grades for motors: the general Y-series motor, the YX3 high-efficiency motor, and the YE3 ultra-high-efficiency motor, with average efficiencies of 87.3%, 90.3%, and 91.7%, respectively. These are the average experimental efficiencies obtained from multiple tests under actual conditions.
What is a high-efficiency motor? High-efficiency motors first emerged during the energy crisis of the 1970s. They consumed about 20% less energy than ordinary motors, making them a technological breakthrough at the time. With the resurgence of energy shortages, high-efficiency motors have appeared in recent years, further reducing energy consumption while increasing efficiency. Subsequent academic conferences have introduced ultra-high-efficiency motors, leading to a classification of motors into four energy efficiency levels: standard efficiency (IE1), high efficiency (IE2), ultra-high efficiency (IE3), and ultra-ultra-high efficiency (IE4).
In 1999, the nation organized the designation of the Y(IP44) series motors, which were internationally advanced in the early 1980s. These motors adopted the power ratings and mounting dimensions specified by the international IEC standards, and used Class B insulation. Mass production began in 1982. Therefore, many motors produced afterward were manufactured according to this standard. In the subsequent process of technological innovation, those high-energy-consuming motors were improved or phased out.
Among the parameters of an electric motor, the following are some common parameters, which we will explain below.
Voltage: For example, below 1500W
Frequency: For example, 50Hz (excluding variable frequency speed control motors).
Power supply: such as three-phase AC power supply
Rated power: for example, 5KW
Number of poles: For example, 4 poles
Speed control: such as constant speed, variable frequency speed regulation
Cooling method: such as closed-loop self-fan cooling
N-design: For example, normal torque, direct start.
Work system: For example, S1 continuous work system
The energy efficiency of an electric motor refers to the ratio of the mechanical energy output by the motor to the electrical energy supplied by the power source. This is a ratio calculation of efficiency.
