Advantages and disadvantages of high voltage motors compared to low voltage motors

1 can do a lot of power, up to thousands or even tens of thousands of kilowatts. This is because, at the same output power, the current of the high-voltage motor can be much smaller than that of the low-voltage motor (essentially inversely proportional to the voltage), such as the rated current of a 500 kW, 4-pole motor, and about 900 A when the rated voltage is 380 V. When the rated voltage is 10kV, it is only about 30A. Therefore, the high voltage motor winding can be used with a smaller wire diameter. As a result, the stator copper loss of the high voltage motor is also less than that of the low voltage motor. For high-power motors, when low-voltage power is used, a large-area stator slot is required due to the need for a thicker wire, so that the stator core diameter is made large and the entire motor volume is large.

2 For larger capacity motors, the power and distribution equipment used in high-voltage motors has less overall investment than low-voltage motors, and the line loss is small, which can save a certain amount of power consumption. In particular, the high-voltage motor of 10kV can directly use the network power supply (the high-voltage power supplied to users in China is generally 10kV), so that the investment in the power supply equipment (mainly the transformer) will be less, and the use is also simpler. It will be less.

(2) Disadvantages

The cost of the 1 winding is relatively high (mainly caused by insulation), and the associated insulation material costs are also higher.

2 The insulation treatment process is difficult and the labor cost is high.

3 The requirements for the use environment are much stricter than for low-voltage motors.

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