1. Concept and calculation of motor power

Motor power refers to the work done by the motor per unit time, usually in kilowatts (kW). The calculation formula for motor power is: power (kW) = voltage (V) × current (A) × power factor. Among them, the power factor refers to the ratio of the actual output power of the motor to the apparent power, which is generally between 0.8-1.

2. Three-phase current calculation formula of the motor

The current calculation formula of the three-phase motor is: current (A) = power (kW) / (√3 × voltage (V) × power factor). In the current calculation formula of the three-phase motor, √3 is the square root of 3, which is used to calculate the relationship between the three-phase voltage and current.

3. Electric energy consumption and power calculation of the motor

The electric energy consumption and power calculation of the motor are calculated by multiplying the power by the running time. Electric energy consumption (kWh) = power (kW) × running time (hours). When calculating the power, the electric energy consumption can be divided by the voltage to get the power (kVAh).

4. Motor efficiency and power factor

The efficiency of a motor refers to the ratio of the motor's output power to its input power, usually expressed as a percentage. The power factor of a motor refers to the ratio of the motor's actual power to its apparent power. A high-efficiency motor can convert more electrical energy into mechanical energy, while a high-power factor motor can reduce reactive power loss.

5. Motor operation time and power consumption calculation

The motor operation time refers to the time the motor runs continuously, usually in hours. The motor power consumption calculation can be calculated by multiplying the motor's power by the running time, and can be adjusted according to actual conditions, such as considering factors such as the motor's load rate.

6. Motor energy-saving measures and power optimization

In order to reduce the motor's power consumption, some energy-saving measures can be taken and the motor's operation mode can be optimized. For example, a frequency converter can be installed to adjust the motor's speed so that it can be adjusted according to actual needs; regular maintenance and cleaning of the motor can also be performed to ensure the motor's operating efficiency; reasonable arrangement of the motor's use time to avoid unnecessary long-term operation can also effectively reduce power consumption.

Calculating the power consumption of a three-phase 125kw motor requires considering factors such as power, current, power factor, and operating time. Through reasonable calculation and optimization measures, the power consumption of the motor can be reduced to achieve energy saving.

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