Manufacturing Process that Set Us Apart
We can provide products that conform to most market specifications including a wide range of catalogue items. Our quality assurance program further complements our ability to deliver products on time with exceptional PPM performance.
Machines and Equipment
Our facility is equipped with computerized, and automated work stations, which allows us to guarantee our customers the highest quality in custom magnetic products.
Automated winding machines
We have a variety of multi-spindle CNC winding machines, which are suitable for the manufacture of several different styles of coils. The machines allow excellent control of the winding processes, including termination, as well as being efficient.
Toroidal coil winding machines
There is a dedicated area for the manufacture of toroidal coils. The methods of manufacture vary from CNC controlled automated machines to hand winding, via an assisted hand winding method, known as “pull winding”.
Lead-free Soldering Equipment
There are also numerous lead-free solder pots in a dedicated room that has a specific extraction facility. All soldering processes in the factory have extraction.
Automatic test equipment is used to confirm product conformance. In addition to being able to test for all the recognized industry standards parameters.
State of the Art Winding
Precision winding enabling 100% standard and requirements conformity
- Bench top winding machines for high precision linear winding applications
- CNC controlled traverse, for precise control of tension for guaranteed repeatability
- Pitch accuracy of 0.00004”
- Electronically stored winding programs
- Perfect-layer coils, self-supported coils and edge wound coils
Encapsulation (Varnish, Casting & Molding) Processes
Satisfying demanding environmental and electrical requirements
- Vacuum & pressure impregnation for HV applications
- Chambers up to 243 inches
- Levels to 100 mTorr
- Many Chambers fully automated with controls to ensure precision
- Unlimited applications including flyback transformers, step-gap transformers and inductor
- Diverse variety of sealants including Anti-fungal & non-nutrient materials
- Custom molds or cups
- Silicones and one or two part epoxies
Automated Production Testing Equipment
State-of-the-art transformer testers provide a fast, reliable and flexible test solution.
- Magnetic/Exciting Current
- Winding Inductance
- Leakage Inductance
- Winding Resistance
- Open Circuit Voltage
- Loaded Circuit Voltage
- Turns Ratio
- Dielectric Testing (HiPot/High Potential Difference)
- Quality Factor
- Interwinding Capacitance
- Insulation Resistance
Skills & Departments
Our technical staff of engineers can provide you with fast prototyping, and product development services for all your magnetic and voltage control needs.
We have an experienced workforce, with the manual skills to carry out the hand winding of intricate coils. This allows the supply of unusual and complicated products that are not suitable for machine manufacture.
Multiple Winding Styles
We wound using many different styles including, Bobbin Winding, Toroid Winding, Stick Winding, Unit Winding and Heavy Winding including rectangular wire and Foil to 22”
Design and Development department
This area supports the customer from the product design, prototype manufacture and production engineering. We offer technical and practical support, as well as being able to supply customers with a rapid sampling service.
We aim to use our experience and skill to combine excellent engineering integrity with commercial considerations. This is to provide a product that suits manufacture and meets the application’s requirements. By using our extensive experience of winding, we ensure the coils are constructed correctly. This means good layering, controlled tension and solid connections.
At Shreejee Electronics, our high-performance magnetic components set new standards in a wide range of industrial and commercial applications.
We manufacture many types of products that multi-national companies use in their power management systems. These systems have functions such as converting generated power, controlling outputs and providing supply voltage protection to Ferrite Transformers and Inductors & Chokes.
Coils are manufactured to be used in many sensing applications. These applications include sensing movement, object presence and magnetic switching. We also manufacture current sensing coils known as “Rogowski Coils”.
Transformers That Perform
State-of-the-art materials, expert design capability and 100% in-house world-class manufacturing