Drawing on decades of experience and continuous market analysis, we can meet the exact needs of manufacturers and repair companies in both the low-voltage and high-voltage range. Impregnation of hybrid and electric motors requires a high degree of process stability and temperature resistance. Our automatic impregnation systems are manufactured to customer specifications and range from small machines to large, fully automated system concepts. We are able to adapt any impregnation system to meet the exact requirements of the customer and their resin, and to integrate them into existing production lines.
Our strengths include selecting the right system concept and manufacturing in accordance with the special requirements of OEMs and suppliers.
In the impregnation method, the component is sealed with insulation material in a process of dipping, trickling or flooding. During this process, the cavities between the windings (wires) in the component are closed and sealed. The impregnation of electrical windings in stators and rotors improves performance and contributes to an increased service life of the drive.
Applying Joule heating (AC or DC) before and during the impregnation process achieves huge energy savings due to the high level of efficiency.
Heating and hardening methods
Whether it is a matter of preheating, soaking or curing, the temperature of objects is always a critical parameter in the process when it comes to the impregnation of electrical components. As the heating methods are a key component of our systems technology, processes like conventional oven heating, resistance heating, induction heating, infrared heating and UV curing are continuously optimised and further developed.
The component is pre-heated and then dipped into the resin bath at a defined speed. As the winding is heated during the dipping stage, the impregnation medium can already be solidified at this stage of the process. This increases resin absorption and reduces draining losses. By varying the dipping speed, the surface condition after impregnation can be optimised. Depending on the application scenario, the process of dipping the component in the medium and removing it can be carried out in several steps. The flexibility of the dipping method means that it covers a wide range of sizes.
In the trickling method, the impregnation medium is applied to the winding of the rotating component. The metering device allows precise control over the quantity and flow of medium. This enables quick and easy variation of resin absorption. There is an option for the component to be heated during the trickling process so that the processing time can be reduced and the impregnation quality can be increased. The trickling method is ideal if only certain areas of an object need to be coated with a medium.
The flooding method is particularly suitable for stators that are already inside a housing before the impregnation process. In this process, only the interior of the stator is flooded with impregnation medium, so that the medium is only applied where it is needed. This impregnation method leaves no residue on the outer shell of the stator housing.
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