High Power Slip Ring Cooling Considerations

May 5, 2020
Latest company news about High Power Slip Ring Cooling Considerations

Under normal operating conditions, the temperature of the carbon brush is generally between 45 ° C and 75 ° C (temperature rise of about 40 ° C), and the operating current of each carbon brush is between 25 A and 125 A. When the single current is high, increase the number of carbon brushes. The brush grip spring pressure is relatively uniform, the carbon brush moves freely and there is no vibration jam. When a single high current of 1000A or more, the heat generated by the carbon brush and the copper ring needs to be taken away by the ventilation system. That is, the heat and heat dissipation reach a basic balance.

Generally, more professional customers will ask us to make a cooling system that meets their wind pressure requirements. What is the status of air volume and wind pressure in heat dissipation?

In practical applications, the nominal maximum air volume value is not the air supply volume obtained by the actual heat sink. The large air volume does not mean that the ventilation capacity is strong. As the air flows, the airflow encounters the fins in its flow path, and its impedance limits the free flow of air. When the air volume increases, the wind pressure will decrease. Therefore, there must be an optimal operating point, that is, the intersection of the fan performance curve and the wind resistance curve. At the operating point, the slope of the fan characteristic curve is minimal and the rate of change of the system characteristic curve is the lowest.