High-voltage motor and low-voltage motor have their own advantages and disadvantages. What are their advantages and disadvantages?
Compared with low-voltage motor, high-voltage motor has the following advantages:
1. The power of the motor can be increased to several thousand, even tens of thousands of kilowatts. This is because, at the same power output, the current of the high-voltage motor is much smaller than that of the low-voltage motor. For example, the rated current of 500KW, 4-stage three-phase AC motor is about 900A when rated voltage is 380V, and only about 30A when rated voltage is 10KV. Therefore, the winding of Takano motor can be used with smaller diameter. As a result, the stator copper loss of the high-voltage motor will be smaller than that of the low-voltage click. For larger power motors, when using low voltage, larger stator slots are needed because of thicker conductors, which makes the diameter of stator core very large and the volume of the whole motor become very large.
2. For large-capacity motors, the total investment of power supply and distribution equipment used by high-voltage motors is less than that of low-voltage motors, and the line loss is smaller, which can save a certain amount of power consumption. Especially the 10KV high voltage motor can directly use the power grid. In this way, the investment in power equipment will become less, the use will become easier, and the failure rate will become smaller.
Compared with low-voltage motor, the disadvantages of high-voltage motor are as follows:
1. The cost of winding is relatively high, and the cost of related insulating materials will increase accordingly.
2. The requirement of using environment is much higher than that of low voltage motor.
3. The insulation treatment process is more difficult, the man-hour cost is more, and the manufacturing cycle of the motor is longer.