For any consumer of motors, the power consumption of the motor is a very critical factor while the motor product meets its purpose. People cares a lot How much energy will be saved between IE4 and IE5 motor?
For motor products, rated voltage, rated power, efficiency, speed and current are all important performance indicators, and for electricity consumption, power and efficiency are important calculation basis for electricity consumption.
For electricity consumption, the unified provision of electricity consumption is the unit of measurement of its energy consumption, that is, with "degree" as the unit of measurement of electricity consumption, one kilowatt-hour of electricity is defined as one kilowatt-hour, that is, it can be calculated according to the power and running time of the motor, but each motor corresponds to an efficiency level, that is, the electric energy absorbed by the motor is not completely converted into mechanical energy, there will be different degrees of loss, so the real power consumption of the motor (M) should be the rated power (P, unit: kilowatts) and running time (h, unit: hours) , divided by its corresponding efficiency (n), i.e., calculated according to the formula M=Ph/n. For example, a 2P motor with a rated voltage of 380V and a rated power of 110kW will consume different power when corresponding to different efficiency.
We calculate the comparison of the electricity consumption of the 2P 110kW motors in the YE5, YE4 and YE3 series for one year of continuous operation based on the efficiency values corresponding to the energy efficiency classes 1, 2 and 3 specified in GB18613-2020.
YE5 motor power consumption: 110x24x365/0.968=995455 (kWh)
YE4 motor power consumption: 110x24x365/0.96=1003750 (kWh)
YE3 motor power consumption: 110x24x365/0.952=1012185 (kWh)
The following table compares the annual power consumption of motors in different energy efficiency classes, and calculates the power savings of YE4 and YE5 series motors relative to YE3 series motors.
From the data in the table, we can see that the relative energy saving seems to be small, but the absolute power saving is a very considerable number, especially for large-size motors. Different local governments, in order to encourage the use of energy-saving equipment, have set the price of electricity by time or electricity, and any energy-using enterprise can evaluate the necessity of using high-efficiency motors through the necessary calculations.
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