Custom Pulse Transformers - HVP: High Voltage Products GmbH

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Custom Pulse Transformers

Part of Our wide offering of transformers is our pulse transformer product line. We specialize in designing and manufacturing high power pulse transformers, with capabilities up to 1.5 MV, 6kA and 1kV, 600 kVA. We offer a number of different types of pulse transformers, with both standard constructions and a huge range of custom configurations available. With the ability to manage all of our clients’ unique manufacturing requirements, ranging from one-off parts and prototypes to long run, large scale production, we have served multiple industries with our products.

We are specialized in manufacturing pulse transformers used in high power applications, including particle accelerators and electron guns. We manufacture pulse transformers for klystron, magnetron or other applications, with various pulse times and repetition rates. In addition, we offer a selection of insulation options, including oil-cooled, epoxy coated, and air/water insulation, depending upon your needs and the setup of your operation. We are ISO 9001:2008 certified, ensuring the high-quality work demanded by sensitive power transfer applications. For further examples of our pulse transformers, please see below, and contact us for more information on custom options.


Industry Standards
International Organization for Standardization

General Information
We have built our reputation on the design and manufacture of high power pulse transformers up to the extremes of 1.5 MV, 6 kA and 1kV, 600 kVA. We design and manufacture:

  • Pulse Charging Transformers
  • High Power Klystron Pulse Transformers
  • Klystron/Gun Pulse Transformers
  • Magnetron/Gun Pulse Transformer Assemblies
  • Tanked Pulse Transformer Assemblies

High Power Klystron Pulse Transformers
This transformer is used in the doubling project (SLED) at Stanford Linear Accelerator Center (SLAC). The unit is rated at 270 Kilovolts, 75 megawatts, for a 7 microsecond pulse. By using precision winding and construction techniques it was possible to limit the rise time to 0.5 microseconds (10-90), while maintaining less than 0.15% p-p flat top ripple. The tapered (constant gradient) secondary windings limit the leakage inductance to almost half of what it would be with the conventional construction. This also helps reduce the pulse rise time. The overall size of the unit is minimized and the efficiency is improved by DC resetting of the core. The bifilar secondary winding feeds heater power to the klystron.

Pulse Charging Transformers
In a repetitive power conditioning system it is often necessary to transfer energy from one capacitor to another at a different voltage level. This resonant energy transfer can be accomplished using a pulse transformer. The unit shown is used to transfer the energy from a 3 µF capacitor at 112.5 kV to a 13 nF capacitor at 1.5 MV. The pulse repetition rate is 0.2 Hz; much higher repetition rates are possible.

Klystron/Gun Pulse Transformers
This unit supplies beam power to a klystron tube and pulse voltage to an electron gun. It is rated at 100 kilovolts, 6 megawatts, for an 8 microsecond pulse, 1000 pulses per second. The transformer is designed for immersion in transformer oil in the customer’s tank. The gun voltage of 70 kilovolts is provided by a tap in the secondary winding. This method of tapping the transformer is considerably less expensive than suppling pulse voltage to the electron gun by the use of a separate gun pulse transformer. In addition, the rise time of the gun voltage is decreased by the relatively lower impedance klystron, rather than by an energy-consuming dummy load across the gun.

Magnetron/Gun Pulse Transformer Assemblies
We have developed design techniques for magnetron pulse transformers which drastically reduce the ripple on the current pulse. The tanked pulse transformer shown here is used to supply beam power to a magnetron and pulse voltage to an electron gun. The unit is rated at 45 kilovolts, 4.5 megawatts, for a 3.5 microsecond pulse. The secondary winding is quadrufilar, and feeds heater power to both the magnetron and the gun. Included in the tank is a magnetron current monitor and bypass capacitors. The unit may be rotated and operated in any position.

Tanked Pulse Transformer Assemblies
This unit consists of a pulse transformer, heater transformer, bypass capacitors, despiking network, current monitor, voltage monitor, klystron socket, and water cooling system. All components are mounted in a two-compartment oil tank. The tank has provisions for mounting of the klystron and the solenoid, and may be rotated and operated in any position. The pulse transformer is rated at 125 kilovolts, 11 megawatts, for a 6 microsecond pulse. The 250 watt klystron heater power is fed through the bifilar secondary winding.

Production Volume

  • Specialty Production Shop
  • Prototype
  • Low Volume
  • Small Run
  • High Volume
  • Large Run
  • Long Run
  • Large Scale Production Volume Run