Ebm Elektrobau Mulfingen Gmbh & Co.

Emb Elektrobau Mulfingen Gmbh & Co.

Franz Jakob

Dieter Best

Helmut Lipp

Wilhelm Reinhardt

Bernhard Bamberger

Rudolf Rebenstrost

A brushless dc external-rotor motor having a hollow cylindrical heat sink fastened to the peripheral border region of a printed circuit board. Power semiconductors are arranged on an inner cylinder wall of the heat sink in a heat conducting manner, and the cylinder wall forms part of the peripheral border of the stator flange in the motor. A connector fastens Hall generator(s) on the circuit board and provides the electrical connection with the circuit board. The connector can be soldered along with all other electronic components in a joint soldering process, wherein a subassembly of a preassembled circuit board and a heat sink fastened to its periphery and carrying the power semiconductors passes through a solder bath to solder all components in a single soldering process. It is subsequently necessary only to plug the Hall generator or generators onto the connector or connectors soldered onto the circuit board. The connector can include individual contact tubes, which are soldered in the circuit board and into which the connection pins of a respective Hall generator can be plugged.

Brushless electric motor with heat sink and mounting arrangement thereof

The invention relates to a collectorless direct-current external-rotor motor (2), which includes a stator (6) with stator windings (12) fastened to a motor flange (4), an external rotor (14) enclosing the stator (6) on its side facing away from the motor flange (4), as well as an electronic circuit arrangement (18) driving the stator windings (12). This circuit arrangement (18) has a conductor plate (24) provided with electronic components (22) arranged adjacent to the flange-side facing the stator (6), as well as several power semiconductors (28) electrically connected to the conductor plate (24), arranged in heat-conducting contact with the motor flange (4). The power semiconductors (28) are joined indirectly by an annular disk-form cooling body (40) to the motor flange (4) to provide a heat-conducting effect. The cooling body (40) forms a preassembled component with the conductor plate (24) and a carrier element (42) which support the conductor plate (24).

Collectorless external-rotor motor with semiconductor cooling system

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Munich, Georgia

Franz Jakob