From the boardroom, to the manufacturing floor, to our offices, from start to finish of every project, Performance and Pride are the cornerstones of Tempel.Tempel provides the broadest range of components to the North American transformer market from our three production facilities located in Canada, the U.S. and Mexico. These products include, distributed gapped cores, slit coils, EI laminations, cut-to-length laminations, fully assembled step-lap and other mitered cores.Transformer EI laminations are also made at our facilities in China and India. Coupled with a wide range of efficient material grades and on-site technical expertise and support, Tempel is the supplier of choice when considering a partner for your transformer core needs.
All of EDCOR Electronics Corporation's transformers that have steel core lamination are made with M6 29 Gauge - 0.014\" (0.355 mm) Grain Orientated Electrical Transformer Steel Lamination, unless otherwise specified by customer, and is RoHS compliant. This steel is used in audio amplifiers, current, output, power transformers; chokes and saturable reactors; and ferro-resonant regulators. The squared hysteresis loop iron-silicon alloy was expressly developed to provide lower core loss with higher permeability in the rolling direction. Grain oriented laminations are supplied in the stress relief annealed condition. The elementary patterns of the crystals in the material are \"oriented\", or so arranged that the axis of easiest magnetization is nearly parallel and aligned in the direction of rolling. The alignment is accomplished by special cold-rolling and annealing processes. This allows the product to withstand more severe vibration and shock and enables the following:
The stacking factor is the ratio of the actual volume of steel in a stack, not including air or insulating materials, compared to the measured dimension of the stack. The stacking factor is affected not only by the surface roughness of the laminations, but also by the pressure applied to the stack and the method of assembly. Examples of typical stacking factors are found in the following table:
I want to make a transformer that steps down mains AC voltage. My researched showed that the best kind of material for core would be laminated iron sheets. Unfortunatelly, these are very hard to buy. Looks like you can only get ferrite cores online.
You don't divulge your location so it is hard to gauge what might be present in your local stores, but you can buy toroidal transformer kits with pre-wound primaries (117VAC) and just add the secondary winding. Here is a supplier.
However, you can make your own, custom, core that actually works quite well. You can buy powdered iron. Make the mold out of wax, mix the powdered iron with an epoxy resin that is about the same consistency as fiberglass resin. Make certain the particles are not clumped together and you have a good concentration of iron. Add the drops of hardener, mix well, and pour it into the mold. Next day, remove the wax. I have a 3KVA isolation transformer that I wound last year, 1:1 turns ratio for 120 VAC that has been doing just fine. To mix the powder into the resin, I used a hand-held blender. As you add powder, the resin becomes almost like a paste, but thins out slightly after you add the hardener.
Since 1956, Lamination Specialties has grown and evolved from a small regional stamper of transformer laminations into a multi-divisional company supplying a wide range of electrical steel products to an international marketplace.
Lamination Specialties is a leading innovator within the industry. Our product portfolio includes the highest quality transformer laminations, motor laminations, specialty steels, and value-added products including Mitre Cut Cores and Distributed Gap Cores.
There are many companies supplying standard 50Hz or 60Hz transformers using grain oriented lamination steel. These standard off the shelf lamination transformers are usually with 120Vac or 220Vac, single of multiple outputs and with some standard output voltages of 5Vac, or 12 Vac, etc.
However when a customer or engineer is looking for a custom 50Hz/60Hz transformer with single or multiple input voltages such as 440Vac or 600Vac and custom output voltages, it is often difficult to find a vendor who can design and built these custom lamination transformers when the volume is low.
The power level can be from milli-Volts-Amps (VA) to 1,000 KVAs or higher. Please see the table below for some of the custom transformers we have designed and shipped to our satisfied customers. Customer reference are available. Please contact CWS at email@example.com for quotes and inquires.
Other custom designed transformers from CWS are400 Hz military, aerospace or naval transformers using amorphous ribbon cores. These transformers are encapsulated in metal case with mounting feets for high performance. The parts listed below are some examples of some custom 50Hz Transformers or Custom 60Hz transformer or 400Hz transformers.
ICC specialises in providing transformer manufacturers with industrial knives, punches & dies in tungsten carbide (widia). Transformer manufacturers save even more by ordering their carbide knives from ICC, as they buy directly from the designer and manufacturer, without intermediaries. We deliver high quality carbide cutting tools, guaranteeing prolonged service life with less burr formation on their silicon steel. Carbide (widia) blades/knives last ten to twenty times longer than traditional knives made of any tool steel. Worldwide supply is guaranteed.
The transformer manufacturing process involves cutting the magnetic lamination or silicon steel. Magnetic lamination or silicon steel is particularly abrasive, causing traditional steel knives to become blunt quickly. This rapid wear leads to the formation of burrs, with production downtime as a result.
In addition to the knives used to cut the transformer lamination, we also supply the necessary punches, dies, and any other parts prone to wear. We also make these parts to order, based on the technical design submitted by the customer.
The iron core is normally made of thin gauge laminated steel either of low cost stamped laminations in the assembly form of EI's or EE's (see Figure 1) or similar laid up structures sometimes in a more costly tape wound double cut core assembly as shown in Figure 2.
Stamped laminations are usually made of .006\" thick material and can go as high as .025\", the cost for producing the lamination is very low, but the high cost comes from the stamping dies used to stamp the laminations and also the final assembly by the customer. While cut cores can be made of very thin magnetic steel strip (such as .001\" and can go as high as .014\") wound over simple low cost mandrels, heat treated, impregnated, and finally cut into two pieces as a completed set and ready for customers use.
The new core configuration called the C-I Core ( Patent pending ) combines the advantage of low cost laminations requiring expensive tooling and those of cut cores which are more expensive to manufacture but requires only simple low cost tooling.
The C-I core can be made of .001\" thick material or greater (up to .014\"), using Grain Oriented Silicon iron, Nickel iron or other Crystalline steels. It offers the designer of transformers and inductors flexible dimensions, high frequency range up to 20KHz, and low cost tooling.
The stripwidth of the \"I\" bar D1 = 2E, the laminations are stacked up to a thickness of E1 = D, and the length of the \"I\" bar L = A (D, E, and A are dimensions of the cut core). For best mechanical and electrical performance, the dimensions of the \"I\" section will be built to the norminal D, E, and A dimensions plus there tolerance.
The core is insulated from the grounded mechanical structures that hold it together and support it and is then intentionally grounded to a single point. Larger transformer cores that have multiple core sections isolated from one another by cooling ducts may implement core jumpers to bond the sections of the core together and a single lead to solidly connect the bonded group to earth. The core, which is effectively a conductor that is not intended as a current-carrying path, may acquire some potential through capacitive coupling with the innermost winding when the transformer is energised (resulting in partial discharges that may damage the transformer) and induced potential when the transformer is carrying load unless the core is solidly connected to earth. The core ground also assures protective device operation in the event of a winding to core insulation failure. For such a fault to be recognised by the protective system of the power supply/line (and quickly disconnect the line), the transformer core must be grounded to provide an electrical (fault) path back to the source. A core is typically grounded at a single point only, as multiple core grounds may result in circulating currents and overheating (and gassing) in the core.
EI lamination cores are mostoften used in transformer manufacturing. In DIN EN 60740-1 (formerly DIN 41 302),standardised EI sheets are divided in to waste-free and low-waste types. Forwaste-free lamination cores, the measurements for the E sheet's winding spaces correspondto the measurements for the associated I sheet. EI lamination cores can beprocessed manually or with the help of nesting machines or welding machines.
Polaris can laser cut all sizes of EI transformer laminations. Below are some examples of EI transformer applications: Instrumentation Electrical control Medical equipment The Field of new energy Cable TV and Digital Networks Hi-Fidelity and Audio Visual
As a designer and manufacturer of transformers, Amerace is vitally interested in the magnetic and electrical properties of the laminations we use. The base magnetic steel properties are tested, but one of the problems in testing laminations such as E & I is that the manufacturing process (stamping) may change the base steel properties. To overcome these variations and provide reliable comparisons our vendor uses the standard Epstein frame test described in the following two standards: 59ce067264