High-voltage motor refers to an electric motor with a rated voltage of more than 1000V. 6000V and 10000V voltages are often used, and due to the different power grids in foreign countries, there are also voltage levels of 3300V and 6600V. The high-voltage motor is generated because the motor power is proportional to the product of voltage and current, so the power of the low-voltage motor increases to a certain extent (such as 300KW/380V), and the current is limited by the allowable bearing capacity of the wire, which is difficult to make large, or the cost is too high. It is necessary to increase the voltage to achieve high power output. The advantages of high-voltage motors are high power and strong ability to withstand impact, but the disadvantage is that they have large inertia and are difficult to start and brake.