DE9210221U1 - Construction principle for power electronics devices with compact housings, e.g. for standard rails - Google Patents

Description

Construction principle for devices of
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compact housings &zgr; - B - for standard &mdash;

rails.

Power electronics devices with an output power of up to around 10 kW are mainly built on circuit boards as a basis or they use a common heat sink as a mounting base or they already use a special structural design.

However, devices with lower power are also installed in commercially available sealed can housings, whereby the internal structure is made on circuit boards that are attached to the front panel of the housing and inserted into a housing with guide grooves. Even when a heat sink is installed, the power loss cannot be arbitrarily high because heat dissipation in the sealed housing is poor and the electronic components inside become very hot. If ventilation slots are added to the housing, the required dust-tight structure is no longer necessary.

The design, which has been registered for protection, has external heat sinks and enables the installation of additional insulated components outside the sealed housing. The sensitive control electronics are located inside the housing, and the necessary operating elements and the connection terminals are accessible from the front of the device.

As shown in Figure 1, a housing (1) that can be opened from the side is used, which has the elements (2) required for standard rail mounting on the underside and the front surface (3) required for operating elements with the power terminals (4) on the front. The insulated power semiconductors (5) are located on heat sinks (6). The connecting wires (7) of the power semiconductors protrude through the hole in the housing side wall, as do those of the external relays and capacitors used, for example.

inside. A first circuit board (8) connects these external components and other components inside the housing. Wires are used to connect this "power board" to the power terminals of the housing, and pin strips or simple wire bridges (9) - pluggable or solderable - are used to connect it to a second circuit board (10) above. This "control board" as well as the power board can have elements for operation, other connections or displays (If) on the edge facing the front that are accessible through the front. Finally, everything is closed off by a housing cover (12). If necessary, this housing cover can also carry other components (13).

A high structure on the solid housing side wall, especially heavy heat sinks, receive an additional standard rail clamp (14) as additional support, e.g. on the heat sink.

Claims (4)

S ection claims 1. Construction of power electronics devices with sealed housings primarily for standard rail mounting, characterized in that a housing that can be opened at the side is used and the power semiconductors and other components mounted insulated on heat sinks are mounted on the outside of the fixed housing side surface and their connections lead through holes into the interior of the housing and are soldered into a circuit board, which on the one hand makes contact with the device connection terminals by means of wires and on the other hand makes a fixed or pluggable connection by means of pin strips etc. to a second circuit board above it, which carries further electronic components and in turn can have a connection to another circuit board above it or to components of the same type located on the final housing cover. 2. Claim according to 1, characterized in that a further printed circuit board is used as the housing cover, which in turn carries components which are covered with a cap or has further connection terminals. 3. Claim according to 1. characterized in that the printed circuit boards used can carry on their side facing the front of the device actuators, terminals and display elements etc., which are connected by a transparent, hinged or perforated front plate can be operated or viewed.
30 4. Claim according to 1. characterized in that in the case of high and heavy constructions, an additional holding device for the standard rail is attached to the external structures. Construction principle for power electronics devices with compact housings, e.g. for standard rails.