Where quality and transformers meet
By Per Lundahl, Managing Director
In conventionally manufactured transformers one have to rely on the enamel isolation of the copper winding wire for electrical isolation within a section. Extra isolation, such as tape and film, is placed only between sections. Within a section, the copper wire is wound in a more or less random fashion, and the voltage difference between two adjacent wires may be substantial. In addition to the risk for short-circuits, the inter-winding capacitance may vary substantially between individual transformers.
As the vast majority of transformers used are produced in this way, transformers have a reputation for unreliability. And the problems are inherent in the construction of the transformers. Thus quality programs which aim at conformity of production (like ISO-9000) can reduce the problems only slightly.
Transformers from LUNDAHL, on the other hand, have a strong reputation for reliability and repeatability. This is a result of a careful design and manufacturing process:
Due to our unwillingness to compromise on our ideas on how the ideal transformer should be designed and manufactured, we refrain from manufacturing products where our design principals can not be applied, such as toroidal transformers. Due to our rather unique concept, we have also been forced to build most of our production machines in house, including e.g. winding machines. As all companies, we are dependent on the satisfaction of our customers to survive, and we will continue to do our best to retain our customers' confidence. In terms of quality development, our future plans are to document certain key steps in the production process which have not yet been properly documented, and to continue to develop the products and the production process in order to give our customers maximum value for their money.