During the packetize process the individual insulated sheets are stacked to a stator and then connected to each other by various methods such as welding, gluing or clamping. When stacking appropriate measures must be taken to ensure the parallelism and eccentricity of the stator.

Paketise Machines

During the isolating process isolating materials are used in different geometries accurately in the stator to isolate the coils against the stator high voltage resistant. Here, different insulating materials are used, which must be reliably introduced into the grooves.

Insulating machines for the following insulation geometries

The flyer, linear or needle winding method is used for winding coils for stator and rotor windings. risomat masters all the aforementioned winding methods. Which method is used project-specifically, is decided together with the customer on the basis of technical and economic criteria’s.

The introduction of the pre-wound coils into the stator slots is accomplished by means of the risomat pull-in technology. Here, the objective is to collect the coils without damage in the grooves and to achieve the highest possible degree of filling. When pulling in the grooves are additionally closed automatically by means of slot wedges.

The drawn-in coils must be shaped or compacted in the region of the winding head, so that the subsequent pulling-in process can be carried out, or after the preforming the bonding or after the final shaping the bandaging can be carried out.

In stators for generators and PSM machines, the sheets are skewed, so that the voltage or torque ripple can be kept as small as possible. risomat has developed a process whereby the stators can be set and welded after all coils are inserted.

The coil lead, which is laid on the winding head, must be insulated by means of insulating hoses against high-voltage and partial discharge. risomat has enormously optimized and streamlined this manual operation with the help of an ergonomic manual workstation, as well as a wiring template and a tube dispenser. The isolated leads are stored and fixed on a patented stator workpiece carrier.

risomat is currently working on the complete automation of the sliding of the insulating hoses.

The coils of the individual phases must be insulated from each other in the winding head against high-voltage and partial discharge. risomat has enormously optimized this manual activity with the help of an ergonomic manual workstation. risomat is currently working on the complete automation for introducing the phase separators.

The coil leads, which are stored on the stator workpiece carrier, must be connected in star or delta connection. In order to make this process reproducible, risomat has enormously optimized and streamlined a method based on the use of a wiring template. risomat is currently working on the complete automation of the interconnection.

After interconnection, the coil terminals are contacted, preferably by the hot-crimping method.

The coils in the winding head on the switching and non-switching side are laced with a cord. This ensures that, on the one hand, the interconnected leads abut compactly on the winding head and, on the other hand, no loose wires protrude for impregnation.

After lacing and final forming, when the stator is prepared for impregnation, the electrical testing of the incorporated winding and insulation system is performed. The following measurements are used: resistance, inductance, impulse voltage, partial discharge, high voltage, insulation resistance and rotating field.