Industrial Transformers

The purpose of this Transformer is to match the Impedance of the loudspeaker or a number of loudspeakers to the optimum load of the tube or transistor. In other words, the transformer transforms the Impedance of the speaker, so that the impedance which it presents to the primary winding is equal to the load of the Output stage active element (tube to transistor).

• Dual Outputs: 4 & 8 Ohms.
• Maximum Ambient Temperature: 40 deg C.
• Frequency Response: 40Hz to 20,000Hz (-2dB).
• Connections: 150 +/- 10mm multi stranded PVC wire. Stripped and Tinned.

Transformer refers to the static electromagnetic setting which can transfer power from one circuit to another one. In AC circuits, AC voltage, current and waveform can be transformed with the help of Transformers. Each transformation is usually to transfer from one circuit to another one by the way of electromagnetism, but it has no direct relation with this circuit. It also can be transformed through electromagnetism (electrical manner). This electromagnetism is known as auto-transformer.

Basics of E & I Transformers
Transformer plays an important role in electronic equipment. AC and DC voltage in Power supply equipment are almost achieved by transformer’s transformation and commutation. At the same time the electrical parameters transformed by transformer are not one but a few ones.

Simple schematic diagram of the transformer is shown below. It is connected by closed-magnet (iron cores), two windings and AC power supply. The winding is called the primary winding; another winding is connected with load, and it is called secondary windings

No-load state of Transformer: viz. the disconnecting state between the secondary winding and load (Figure 1-2). Connect the primary winding and the power supply of AC voltageU1, and then it will produce alternating current I0, this current is called no-load currents. This current set up alternating magnetic flowf0 which is closed along iron core magnetic circuit. At the same time, it traverses the primary winding and secondary winding, and then produces inducting electromotive forceE2 (secondary no-load voltage).

Toroidal Transformer offer many advantages over a conventional laminated transformer.Toroidal has a round shape with no air gaps,and with the primary and secondary windings uniformly ditributed around the core,"locks in" the magnetic field and makes the toroidal transformer very quiet and efficient.

Toroidal Transformer,by meeting today’s requirements for smaller,more efficient,quieter and safer products,are being accepted in an increasing range of electronic and electrical equipment.With toroidal transformer smaller dimensions, lighter weight and low stray magnetic fields,you can build more compact,lower cost quality products without sacrificing performance.

The main purpose of these transformers is used in energy saving technology which in turn enhances the performance and saving the energy.

We have both in single phase and cascaded in three phase as per the utility by the customer.

Vritti Associates introducing international standard Box Series Medical Grade Isolation Transformers with very low noise and minimal Electro-Magnetic Radiation available in different models in aesthetic enclosures suitable for floor or wall mountable type.

Vritti Associates' Isolation Transformers offers reinforced safety when using in electronic devices or even for electro medical equipments. Our safety standards are well within the recommended standards in compliance as stipulated by National Electrical Code and as per Underwriters Laboratories safety standards.

Vritti Associates manufactures a wide range of transformers for the medical industry. These can be supplied on either a standalone unit or for assembly in customer's equipment.

We have models available for both international standards at 115V/60 Hz and in domestic usage at 230/50 Hz.

The main transformer is of Toroidal type which we produce in-house and it is one of the most advantageous as compared with other type of transformers mainly it is very efficient, small in size, low noise, low in Electro Magnetic Interference which in turn enhances the performance of the electronic and other electro medical equipments.

We follow some of the below regulations which fall under UL 60601-1, CSA C22.2 No.601 and EN 60601-1 standards like

• Max. patient auxiliary current
• Max. enclosure leakage current
• Max. patient leakage current
• Max. High voltage test between windings
• Min. creepage distance
• Min. air clearance
• Max. temperature rise at load and at over load
• Limited max. earth leakage current

We can offer a wide range of products that can be easily configured. We can provide the required cable assembly, enclosures, and circuitry designs as per your requirements.

These transformers are mainly used in computers, Audio/Video monitors, closed circuit surveillance cameras, test and measuring instruments, digital printers, and hospitals and in other electronic/electro medical equipments.

Vritti Associates design and manufacture Power Transformers for a variety of power supply and power conversion applications. Power transformers may be designed in a wide variety of shapes and sizes.

Design requirements for a Power Transformer
Typical minimum requirements to be specified for a Power Transformer are

• Power rating in VA.
• Frequency usually 60 Hz.
• Number of primary windings.
• Number of secondary windings.
• Operating voltages levels.
• Operating current levels
• Operating frequency is needed for core calculations and wire sizing.
• Core material is selected for the known operating frequency or frequencies which is typically silicon steel laminations.
• Other Power transformer design considerations are space limitations and mounting technique.
• Lead terminations are also specified through the design of a Power Transformer.

Power transformer designs vary widely in terms of power rating, voltage and current levels (turns ratios), operating frequency, size, impedance, bandwidth (frequency response), winding and other parameters

Vritti Associates design and manufacture Power Transformers for a variety of power supply and power conversion applications. Power transformers may be designed in a wide variety of shapes and sizes.

Design requirements for a Power Transformers :
Typical minimum requirements to be specified for a Power Transformer are:

• Power rating in VA.
• Frequency usually 60 Hz.
• Number of primary windings.
• Number of secondary windings.
• Operating voltages levels.
• Operating current levels
• Operating frequency is needed for core calculations and wire sizing.
• Core material is selected for the known operating frequency or frequencies which is typically silicon steel laminations.
• Other Power transformer design considerations are space limitations and mounting technique.
• Lead terminations are also specified through the design of a Power Transformer.

Power transformer designs vary widely in terms of power rating, voltage and current levels (turns ratios), operating frequency, size, impedance, bandwidth (frequency response), winding and other parameters.

A switched-mode power supply (also switching-mode power supply, SMPS, or simply switcher) is an electronic power supply unit that incorporates a switching regulator in order to provide the required output voltage. The switch mode transformer is used in conjunction with the switching regulator to form a switch mode power supply.

Switch mode power transformers are used extensively in electronic applications, usually within a switch mode power supply

Switching Mode Power Transformers, Basic Application Circuits
The design of a switch mode power transformer will differ depending upon the type of circuit used. There are many variations of switching mode power supplies, but they can be narrowed down to three basic circuit configurations (each also has a mirrored configuration); Buck, Boost, and flyback. Be aware that the name for the Buck circuit varies from industry to industry and from person to person. It may also be referred to as an inverter, D.C. converter, forward converter, feed forward, and others. There are also unipolar and bipolar (push-pull) versions.

A reliable power supply presupposes a sufficiently large supply system with high-performance transformers. The high quality standards set by VRITTI ASSOCIATES are appreciated throughout the world and these are applied to development, manufacture.

Power transformers up to 30 KVA class are regularly manufactured and supplied to the domestic/international markets as per various national/international standards. The high quality standards set up by the company are appreciated by our customers in India and abroad.

The design, manufacturing and test facilities have been approved to ISO9001:2008 Certification, and the high quality and attention give to customer’s requirements have resulted in  VRITTI ASSOCIATES being granted approval by a significant No. of International & national companies in the electronic & electrical Industries.

Toroidal Transformer offer many advantages over a conventional laminated transformer.Toroidal has a round shape with no air gaps,and with the primary and secondary windings uniformly ditributed around the core,"locks in" the magnetic field and makes the toroidal transformer very quiet and efficient.

Toroidal Transformer,by meeting today"s requirements for smaller,more efficient,quieter and safer products,are being accepted in an increasing range of electronic and electrical equipment.With toroidal transformer smaller dimensions, lighter weight and low stray magnetic fields, you can build more compact,lower cost quality products without sacrificing performance.

Basics of Toroidal Transformer
Toroidal transformers are built around a ring-shaped core, which, depending on operating frequency, is made from a long strip of silicon steel or permalloy wound into a coil, powdered iron, or ferrite core. A strip construction ensures that the grain boundaries are optimally aligned, improving the transformer's efficiency by reducing the core's reluctance. The closed ring shape eliminates air gaps inherent in the construction of an E-I core. The cross-section of the ring is usually square or rectangular, but more expensive cores with circular cross-sections are also available. The primary and secondary coils are often wound concentrically to cover the entire surface of the core. This minimizes the length of wire needed, and also provides screening to minimize the core's magnetic field from generating electromagnetic interference.

A range of high quality low profile encapsulated isolating transformers with twin 115V AC 50/60 HZ primary windings which may be connected in series for 230V or parallel for 115V operation designed for through hole soldering direct to printed circuit boards, mechanical fixing can be supplemented by 4 self tapping screws using holes moulded into the corner of the case.

Double section glass fibre reinforced polymide bobbins

• 5 KV primary /secondary isolation
• 100% electrical and flash tested
• High efficiency and low temperature rise
• Low radiated noise
• Extra fixing holes for secure board mounted
• Low interwinding Capacitance