Electrical steel coatings are integral to the performance of electric motors, generators and transformers, restricting eddy current losses by insulating each sheet of steel within the lamination stack.
Applying our expertise in silicon steel production, surface chemistry and downstream processing, Quaker Houghton offers a full range of NGO steel coatings including products to withstand annealing.
The benefits:
The demand for more efficient electric motors and generators is driving a trend to use thinner steel sheet in lamination stacks, in order to reduce core losses.
Bonding varnish, also known as backlack, provides both insulation and adhesion for these high efficiency core stacks, eliminating the need for traditional joining techniques such as interlocking, welding or clamping that are harder to achieve with thin-gauge steel and can impair magnetic performance.
Quaker Houghton has developed a universal, one-component, self-bonding varnish for simplified, flexible production of high-performance bonded lamination stacks. This allows for both longer bonding times at lower temperatures for large stacks, as well as fast bonding where high productivity is required, without compromising on adhesion.
