Interphase Transformers

Mag-Tran's Interphase transformers are used in a circuit with a rectifier transformer having both delta and wye secondaries which create a current imbalance. The interphase transformer corrects this imbalance.

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Below are examples of some of the different models we have built for customers:

MT-3848 0.338mH end to end 2x 1466Arms 850VDC, 4kVrms Dielectric withstanding NEMA1 enclosure

Standard Specification Ranges

Our goal is to give our customers the most flexibility possible so they can design and implement our Interphase Transformers into their specific systems. Doing this accomplishes two things:

  • The customer gets a solution that fits their system perfectly without having to make sacrifices, and
  • The customer also saves money by not having to pay for components and transformer sizes that may not be needed or fit their needs.

If for any reason you are having trouble determining the specifications of your next transformer, feel free to give us a call or send us an email. Our sales representatives and engineering staff can help you find the needed information.

Voltage Up to 1,500VDC
Rated current Up to 6,500ADC
Current imbalance Up to 6%
Expected audible noise Interphase transformers are inherently noisy, but we have developed construction techniques that help to minimize audible noise.
Other Options Noise specifications
Connection location specifications

Our Interphase Transformers

The Interphase Transformer is used “to absorb the difference between the direct voltages of the individual systems and must be designed for the times integral of this voltage” (Schaefer, 1965).

Interphase transformers are used in systems that have two rectifier systems being used in parallel. The need for the Interphase Transformer is present because when connecting rectifiers in parallel, their direct voltages fluctuate. Furthermore, rectifier systems can only be connected in parallel if their fluctuating voltages are equal at any instant. Essentially, their average values must equal and the ripple voltages must coincide. “Under this condition rectifier installations for very high current ratings are sometimes built of several simultaneously commutating and directly paralleled groups” (Schaefer, 1965). In practice, this setup is rarely found.

It is most commonly desired, instead, to displace the ripple voltages so that the combination results in a system with a higher pulse number. “The parallel connection must then be made in such a manner that it does not affect the operation of the individual groups. This is accomplished with an Interphase Transformer” (Schaefer, 1965).

Works Cited

Schaefer, J. (1965). Interphase Transformer Connections. In J. Schaefer, Rectifier Circuits: Theory and Design (p. 31). New York, New York, United States of America: John Wiley & Sons, Inc. Retrieved March 27, 2014