Tuesday, November 07, 2006
Braking resistors provide powerful performance
When using resistors in frequency convertors and servo controllers, small size and facility for direct heatsink mounting offer great advantages.
When using resistors in frequency convertors and servo controllers, small size and facility for direct heatsink mounting offer great advantages. The Isabellenhutte braking resistors not only fulfil these requirements but also have high nominal power and pulse power. Isabellenhutte produces its braking resistors using ISA-Plan foil technology.
They are etched out of relatively thick, rolled, homogenic Manganin foil, electrically insulated and mounted on a 2mm thick solid copper substrate using heat conducting adhesive.
The large mass of the resistor's structure allows for a very high short-term energy load capacity (up to 100J).
The excellent heat conductivity of the ceramic-filled adhesive reduces internal heat resistance to 0.1K/W and its size in combination with the large copper mass of the mounting allows for an extremely high pulse load of up to 3kW/s.
Within the overall working temperature range of -40 to +170C Manganin also provides a largely temperature independent resistance value.
The braking resistors are constructed with IP54-rated packages, using UL-listed materials and a low profile of only 14mm, and so are ideal for installation in frequency convertors or servo controllers.
There are four different sizes (types BRQ, BRM, BRK and BEK) for values ranging from 1 to 300ohm.
The resistors are available both with connecting wires and contact pins (Econopack) and can be mounted directly onto a heatsink.
When using resistors in frequency convertors and servo controllers, small size and facility for direct heatsink mounting offer great advantages. The Isabellenhutte braking resistors not only fulfil these requirements but also have high nominal power and pulse power. Isabellenhutte produces its braking resistors using ISA-Plan foil technology.
They are etched out of relatively thick, rolled, homogenic Manganin foil, electrically insulated and mounted on a 2mm thick solid copper substrate using heat conducting adhesive.
The large mass of the resistor's structure allows for a very high short-term energy load capacity (up to 100J).
The excellent heat conductivity of the ceramic-filled adhesive reduces internal heat resistance to 0.1K/W and its size in combination with the large copper mass of the mounting allows for an extremely high pulse load of up to 3kW/s.
Within the overall working temperature range of -40 to +170C Manganin also provides a largely temperature independent resistance value.
The braking resistors are constructed with IP54-rated packages, using UL-listed materials and a low profile of only 14mm, and so are ideal for installation in frequency convertors or servo controllers.
There are four different sizes (types BRQ, BRM, BRK and BEK) for values ranging from 1 to 300ohm.
The resistors are available both with connecting wires and contact pins (Econopack) and can be mounted directly onto a heatsink.
# posted by Swathi @ 4:47 AM 
