How many electrical connections does a motor usually have?
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Why do some motor housings share a power supply with the rear cooling fans, while others have separate ones? Also, can the electric heating of the motor be omitted? Under what circumstances should it be used?
This post was last edited by shit0u on 2016-5-12 at 17:46. Generally, the cooling fan at the rear of an inverter-driven motor is not coaxial with the main motor, so an additional power supply for the cooling fan is required. The rest are all connected to the main power supply. The high-voltage motor heater is generally not activated in a non-humid environment. The main function of the heater is to maintain a high insulation resistance in the motor, preventing dew formation due to moisture accumulation under conditions of high air humidity and large fluctuations in ambient temperature; this prevents the internal windings from losing their insulation properties as a result of moisture exposure ； Another function is to prevent the motor from starting when it is too cold (mainly in areas with low temperatures).