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The main reason for the high current of high-efficiency motors is due to optimization measures in the design. In order to achieve high efficiency, motor designers will take measures to reduce motor losses, such as reducing the number of turns in the winding and decreasing the resistance to reduce heat loss. However, these measures will also increase the excitation current of the motor, resulting in a larger current bias.

Specifically, the reasons for the high current of high-efficiency motors include the following aspects:

1. Reduce the number of turns in the winding: By reducing the number of turns in the winding, the resistance is lowered, thereby reducing heat loss. But doing so will result in a decrease in the power factor of the motor and a corresponding increase in excitation current.

2. Power supply voltage: If the power supply voltage is too high, the motor core will experience magnetic saturation, resulting in excessive no-load current. Adjusting the power supply voltage can solve this problem.

3. Motor aging: Old motors experience an increase in no-load current due to corrosion or aging of silicon steel sheets, weakened magnetic field strength, or damage to inter sheet insulation.

4. Assembly issue: Improper assembly or excessive clearance of the motor after repair can also cause abnormal current.

5. Wiring error: Insufficient turns or incorrect wiring of the stator winding, such as misconnecting the Y-shaped connection into a triangular connection, can cause an increase in current.

In addition to the above reasons, there are also other factors that may cause the current of high-efficiency motors to be too high. For example, poor heat dissipation of the motor, high ambient temperature, and increased mechanical friction inside the motor may all increase the motor's current. Therefore, when using efficient motors, it is necessary to pay attention to the impact of these factors on motor operation and take corresponding measures for prevention and treatment.

Hengda Electric has always been dedicated to the research and development, production, and service of high-efficiency and energy-saving motors. With advanced technology and equipment, lean manufacturing processes, reliable product quality, and satisfactory after-sales service, the company provides customers with the most suitable motor professional solutions and creates greater social value.