Klemperer Hans

Bio: Klemperer Hans is an academic researcher from Raytheon. The author has contributed to research in topics: Welding & Condenser (heat transfer). The author has an hindex of 7, co-authored 17 publications receiving 162 citations.

Condenser welding system

Abstract: This invention relates to condenser welding systems, and more particularly to those systems in which electrical energy is stored in a condenser and then discharged through a welding transformer to deliver welding current to a resistance welding load. In the copending application of Hans Klemperer,...

Controlled peaking transformer

Abstract: This is a division of applicant's copending application, Serial No. 349,785, filed August 2, 1940, now Patent No. 2,395,881, dated March 5, 1946. This invention relates to controlled peaking transformers in which alternating voltages of sine wave form are converted into peaked waves of controllable...

Condenser charging system

Abstract: This invention relates to a system for charging a condenser to a predetermined voltage. The charge on such a condenser may be used for any convenient purpose, such as resistance welding. An object of this invention is to charge the condenser at a rapid rate and to automatically terminate the...

Power Conversion Device

Abstract: A power conversion device includes a power switching circuit that supplies AC voltages generated between switching elements operating as upper arms and switching elements operating as lower arms, and a control circuit that generates and supplies to the driver circuit signals for controlling the switching operation of the switching elements by a PWM method in a first operational region in which frequency of an AC power to be outputted is low, and that generates and supplies to the driver circuit signals for controlling the switching operation of the switching elements at timings based upon the phase of the AC power to be outputted in an operational region in which the frequency of the AC power to be outputted is higher than in the first operational region.

Controlled ferroresonant transformer regulated power supply

Abstract: Standard configuration ac power transformer core sections are combined with standard configuration solenoid winding sections to provide a saturable core transformer which is arranged to be driven into saturation by applied alternating and direct current energy with the control of variations in flux changes up to saturation exercised by the direct current flow A center tapped primary winding is arranged on an I-shaped stack of transformer iron laminations for full-wave excitation A C-shaped stack of laminations is arranged adjacent to the I-shaped stack and separated by an air gap whereby the primary winding also serves as an input filter choke The core structure is completed by an E-shaped stack of laminations arranged adjacent to the I-shaped stack and separated by another air gap Two solenoid windings are arranged on the outer legs of the E-shaped stack and connected to a capacitor for resonating the overall ferroresonant transformer circuit arrangement Secondary windings are also arranged on the outer legs and connected to a rectifying circuit for supplying direct potential to a load A control winding is arranged on the central leg of the E-shaped stack of laminations With this arrangement, the control winding is unaffected by variations in the ac voltage as they affect the flux changes in the transformer or in the frequency of the ac Regulation of the power supply is executed by direct current flow in the control winding An adjustable resistor connecting the control winding across the output of the rectifier circuit is often all that is required to complete the circuit In some applications, an amplifying circuit is used to provide a desired gain in the control winding circuitry

Resistance-welding power supply apparatus

Abstract: Disclosed is a resistance-welding power supply apparatus comprising a large-capacitance capacitor 20 for storing a welding energy in the form of electric charge, a charging unit 18 for charging the capacitor 20 up to a predetermined voltage, a transistor group 22 electrically connected between the capacitor 20 and a welding electrode 24 on one hand, and a control unit 30 for causing a switching action of the transistor group 22 at a predetermined frequency during the weld time to provide a control of a welding current I. The charging unit 18 includes a charging transformer 14 and a rectifying circuit 16. The control unit 30 includes a main control unit 32 for providing a control of the witching action of the transistor group 22 by way of a drive circuit 44. The control unit 30 further includes various sensors, measuring circuits and an arithmetic circuit, for providing a feedback control of the welding current, an interelectrode voltage or a welding power.

Methods and apparatus for recording well logging measurements

Abstract: In accordance with illustrative embodiments of the present invention, data signals, particularly well logging data in analog or digital form, is recorded by a cathode ray tube recorder. A representation of the CRT beam is repetitively swept across a recording medium while being modulated with representations of the well logging signals. This modulation varies as a function of the rate of change of the well logging signals to produce an even density recording. Coding of the recording lines or traces and the areas between selected traces can be accomplished. This coding of the lines is also varied in dependence on the well logging signal rate of change to produce a uniform coding presentation. Depth information can be recorded on the recording medium by writing depth numbers and depth lines on the record medium. Moreover, a section by section visual presentation of the data can be produced while it is being recorded.