Heatsink cooled power resistors
from few watts till 100kW.
A heatsink is a passive heat exchanger that transfers heat from the resistor to the medium, usually air, that surrounds it. The resistor housing can be designed so that it functions as a heatsink. A separate heatsink can also be attached to the resistor housing. Typically, a metal such as aluminum or steel is used as the material for heatsink construction.
The design of the heatsink increases the surface area of the resistor housing so that more air comes in contact with the resistor. Heat is therefore transferred more efficiently. A heatsink is a simple innovation in the mechanical design of the resistor that leads to improved convection cooling. Fans and blowers can be used to increase airflow further and improve the rate of cooling.
Danotherm heatsink cooled resistors are available in power ratings ranging from 12 W to 570 W with convection cooling (up to 2500 Watts for CCH resistors with an additional liquid-cooled plate). The working voltage for the resistors ranges from 265 to 5000 VAC / 100 to 1400 VDC. The environmental protection ratings for heatsink cooled Danotherm resistors include IP00, IP50, and IP65.
Danotherm heatsink cooled resistors are widely used in power drives, balancing, power inverters, and switching circuits.
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