Why high power motor is suitable for high voltage and medium voltage?
Reduce the cost of power supply.
Higher voltages allow for the use of smaller cables to reduce distribution cable cost,that means reducing the current by increasing the voltage. So medium (3kV~11kV) and high voltage are more prefer for heavy duty applications.
When the power factor of the motor is fixed, the same power of motor voltage and current is inversely proportional,
High voltage=small current, low voltage=large current
Low voltage high output motors can only achieve higher power through higher currents, so that electromagnetic wires and motor leads with a sufficiently large cross-section are required to meet high currents, the iron slot needs to be enlarged, and the control equipment of the motor must be able to withstand the impact of high currents.
If the high voltage or medium voltage motor is used,the current becomes smaller,only the electromagnetic wire and the insulation structure of winding, the wiring system must meet the special requirements of high and medium voltage.
From the electrical perspective, low-voltage motors have to go through a transformer, while high-voltage motors are directly connected to the power supply line, it’s reducing the cost of electricity.
From the power and winding perspective, high voltage motors have greater advantages, but there are also limitations in terms of manufacturing and use: high-voltage motor windings are more expensive, such as the cost of magnet wires, mica materials, high and low resistance bands, magnetic slot wedges,etc; Each coil of the high voltage motor must go through the external insulation wrapping test and insulation treatment process.
From the usage perspective, the requirement of environment for high-voltage motor is higher than for low-voltage motors, including ventilation and heat dissipation devices, bearing system shaft current prevention measures, etc.
End-users should consider the reliability needs of their specific application, and our engineers will assist you if you have problems with selection or others.
sunny@doulipower.com
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