DC motor or AC motor, which one is more efficient?

The efficiency of a DC motor depends on the design of the motor and the conditions of use. Generally speaking, the efficiency of DC motors can reach 75%~90%, but the efficiency will decrease under low loads.

The efficiency of an AC motor is affected by factors such as the motor's structure, working conditions, power supply voltage, and power frequency. Generally speaking, the efficiency of AC motors can reach 85%~95% under rated load, but the efficiency will decrease under low load.

The efficiency range of DC motors is narrow. Generally, the efficiency is higher under rated load, but the efficiency will be significantly reduced under low load. The AC motor has a wider efficiency range. It not only has high efficiency under rated load, but also maintains a high level of efficiency under low load.

DC motors have poor efficiency stability and are easily affected by load changes and power supply voltage changes. The AC motor has better efficiency and stability, and has stronger adaptability and stability.

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