A solid-state pulse generator using a split magnetic core transformer is described. In one embodiment, the solid-state drive circuit uses MOSFETs switching a blumlein to produce a desired input pulses in a primary winding of the split magnetic core. The pulse length is determined primarily by the characteristics of the blumlein and the split core transformer. The “on” time of the solid-state devices can exceed the output pulse length, thereby reducing the chance of damaging voltage spikes. The use of a split magnetic core allows several solid-state drive circuits to be used in parallel to produce a single output pulse. In one embodiment, each solid-state drive circuit drives a separate single-turn primary winding of a split magnetic core transformer. In one embodiment, each core of the split core transformer has one primary winding. The separate cores of the split core transformer are provided with a single secondary winding that couples all of the cores to produce a relatively high-voltage output pulse with relatively few turns in the secondary winding.

Repetitive power pulse generator with fast rising pulse

A method for using magnetic fields to heat magnetically susceptible materials within and/or adjacent to adhesives, so as to bond, bind, or fasten solid materials to one another. The system uses alternating magnetic fields that induce eddy currents and generate heat within susceptors. An induction heating tool is used to emit the magnetic field at its work coil, and an electronic controller measures the energy being used by a power converter that generates the alternating current driving the work coil which creates the magnetic field. The heating tool is used in a method of adhesive bonding in which the thickness of the conductive layer of the susceptor is in the range of 0.01-3.0 mils, or the heating event time interval is in the range of 0.05-10.0 seconds, or the average power density of the magnetic field at the susceptor is in the range of 10-5000 Watts per square inch.

Method of adhesive bonding by induction heating

Disclosed is a high-voltage, high-current, multichannel, optically-trigge switch with the potential for improved lifetime of operation. Triggering of the switch is accomplished by ultraviolet illumination of multiple cathode apertures via fiber-optic cables. The trigger optics for each channel, being composed of a fiber-optic cable terminated by some collimating optics, are protected from damaging metalization by enclosing them in an angled metal or dielectric tubes in the cathode backspace. The use of collimating optics at the output of the fiber allows the fiber to be recessed inside the shield tube, providing further protection from discharge by-products.

Optical pseudospark switch

Capacitor based pulse forming networks and methods are provided which require fewer inductors are that pulsed more frequently to provide a smaller, lower mass, and lower inductance pulse forming network having better pulse shaping characteristics than conventional pulse forming networks. In one implementation, the invention can be characterized as a capacitor based pulse forming network comprising a plurality of inductors adapted to be coupled to a load, a plurality of capacitor units, and a plurality of switches. Each switch couples a respective capacitor unit to a respective inductor, wherein multiple capacitor units are coupled to each inductor by separate switches. The plurality of switches are adapted to non-simultaneously discharge at least some of the multiple capacitor units to provide non-simultaneous pulses through a given inductor to the load and not through other inductors. The non-simultaneous pulses form at least a portion of an output pulse waveform to the load.

Capacitor pulse forming network with multiple pulse inductors

An apparatus and system for using magnetic fields to heat magnetically susceptible materials within and/or adjacent to adhesives, resins, or composites so as to reversibly or irreversibly bond, bind, or fasten opaque or non-opaque solid materials to one another. The system makes use of the effect that alternating magnetic fields induce eddy currents and generate heat within susceptors, and the effect that alternating magnetic fields additionally induce magnetic hysteresis that occurs in magnetic materials and thereby generate heat. An induction heating tool is used to emit the magnetic field at its work coil, and an electronic controller measures the energy being used by a power converter that generates the alternating current driving the work coil which creates the magnetic field. The distance between the susceptor and work coil is repeatedly analyzed based upon the power converter's input energy, and the work coil is driven at a repeatedly corrected power level during the heating cycle. Once a sufficient accumulated energy has been delivered to the susceptor, the magnetic field is turned off automatically by the tool, thus preventing overheating of the susceptor.

Hand held induction tool

A high-power pulse transformer for short, high-voltage and/or high-current pulses includes: a base plate in a container, an insulating, cooling dielectric liquid with a given heat transfer coefficient in the container; at least one magnet core on the base plate with self-enclosed magnet legs around a central window and wide sides with axes normal to the axis of the window; at least an undervoltage and an overvoltage winding in the liquid wrapped in each other around parts of the magnet core immersed in the liquid and linked to the magnet core and to each other, the windings including turns of substantially mutually doubly-wound electrically insulated metallic conductors having winding ends disposed in leadthroughs in the container walls, the conductors having surfaces with a heat transfer coefficient higher than that of the dielectric liquid; the turns of each winding being self-supported and spaced apart from the turns of the other winding by a first minimum spacing and spaced from the magnet core by a second minimum spacing; support insulators partly disposed in the liquid and adjacent and spaced from at least one side of the magnet core by a third minimum spacing being greater than the sum of the second minimum spacing and the thickness of the turns, at least the ends of the windings being secured in recesses formed in the support insulators; and a device for retaining the magnet core and the support insulators on the base plate.

High-power pulse transformer for short high-voltage and/or high-current pulses

A high-energy TE laser system, includes an excitation circuit, a laser head having an optical axis, a laser chamber with a gas space formed therein, at least two laser electrodes being disposed opposite each other and spaced apart in the laser chamber parallel to the optical axis of the laser head for producing an arc-free capacitor discharge between the electrodes being as homogenous as possible in the gas space for excitation, at least one rapid high-voltage switch, a pulse-forming network connected to the rapid high-voltage switch for producing high-voltage pulses at the laser electrodes with the rapid high-voltage switch, the pulse-forming network including first and second strip conductor capacitors respectively associated with the rapid high-voltage switch and with the laser head, the strip conductor capacitors including plates and dielectric layers disposed between the plates extended substantially normal to the optical axis of the laser head, forming a capacitor stack stacked substantially parallel to the optical axis of the laser head, the plates being connected in the pulse-forming network, the pulse-forming network being a Blumlein circuit in which at least one plate of the second strip conductor capacitor is connected to one of the laser electrodes, and the plates being divided into n adjacent plate sections having n-1 partings respectively disposed therebetween, and coupling inductances conductively connecting the plate sections to each other. Otherwise, the pulse-forming network is a charge-transfer circuit in which at least a partial surface of the plates of the first and second strip conductor capacitors are connected in common to one of the laser electrodes.

High-energy laser system

Bandleiterkondensator zur energiespeicherung, vorzugsweise fuer hochenergielaser

An excitation circuit for a TE high-energy laser system, includes at least one high-speed, high-voltage switch, activatable for energizing a pulse-generating network to generate high-voltage pulses at a pair of laser electrodes; the pulse generating network having first and second strip-line capacitors associated with the high-voltage switch and the laser chamber and with appertaining equivalent inductances of the excitation circuit formed from self-inductance of the high-voltage switch, the laser chamber, leads of the system and the stripline capacitors has at least a third stripline capacitor included in the pulse-generating network in addition to the first and second stripline capacitors, a series connection of the high-voltage switch and one of the equivalent inductances being connected in parallel with the first stripline capacitor and with a series-parallel circuit formed of the second stripline capacitor and a parallel connection made up of the third stripline capacitor in parallel with an impedance as well as with a series connection of the laser chamber and another of the equivalent inductances.

Excitation circuit for a TE high-energy laser system

Sheetform conductor type capacitor for energy storage in combination with a high-energy laser of the TE type, the laser having an optical axis, a laser chamber with at least two laser electrodes having a gas space therebetween, the laser electrodes being spaced apart opposite each other and extended parallel to the optical axis, excitation taking place by an arc-free capacitor discharge in the gas space being as homogeneous as possible, and pre-ionization devices associated with the laser electrodes, a pulse forming network, connected to the laser electrodes, coatings of the sheetform conductor type capacitor connected to the laser electrodes, electrodes defining a fast-high-voltage contact-break distance, the contact-break electrodes being connected to the laser electrodes, dielectric layers disposed between the coating of the sheetform conductor type capacitor in a direction substantially normal to a given stacking direction thereto parallel to the optical axis of the laser, the at least two laser electrodes including a first electrode connected through the sheetform conductor type capacitor to the pulse-forming network for a high voltage pulse, and a second electrode being disposed opposite the first electrode being connected to ground potential, wherein the improvement comprises at least one of the sheetform conductor type capacitors connected to the first laser electrode having notches formed therein for increasing the length of their current path for discharge current.

Cirkel Hans-Jurgen

Papers

High-power pulse transformer for short high-voltage and/or high-current pulses

High-energy laser system

Bandleiterkondensator zur energiespeicherung, vorzugsweise fuer hochenergielaser

Excitation circuit for a TE high-energy laser system

Microstrip capacitor for energy storage, preferably for high-energy lasers