Herman P. Schutten - Milwaukee WI Robert W. Sackett - Milwaukee WI Jan K. Sedivy - Elm Grove WI
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
H02P 126 H02M 502
US Classification:
318781
Abstract:
A start-up control technique is disclosed for an AC motor. At least one H-switch connects a motor winding to a pair of AC-supplied power lines and is switched between designated states to yield a fundamental frequency component voltage waveform in the winding phase shifted from the voltage waveform in another winding. A rotating field is provided for start-up, without energy-storage phasing capacitors or inductors.
Herman P. Schutten - Milwaukee WI Robert W. Sackett - Milwaukee WI Jan K. Sedivy - Elm Grove WI Michael E. Taken - Cedarburg WI
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
H02M 502
US Classification:
363157
Abstract:
An AC frequency conversion technique is provided by alternately switching between AC power lines at irregular times to yield a chopped sinusoid switched output waveform of given fundamental frequency. The technique does not rely on an input rectifier bridge nor on capacitive filtering to DC.
Columnated And Trimmed Magnetically Sensitive Semiconductor
Stanley V. Jaskolski - Sussex WI Herman P. Schutten - Milwaukee WI Gordon B. Spellman - Mequon WI Jan K. Sedivy - Elm Grove WI Maurice W. Jensen - Greendale WI
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
H01L 2722 H03K 1790
US Classification:
357 27
Abstract:
A Hall effect semiconductor device is provided with means for clipping or focusing emitted carriers to form a centralized columnated beam, and trimming means for accurately controlling the amount of magnetic deflection due to Lorentz force. Emitters from an emitter region travel through a base region under influence of an externally applied drift field toward a pair of spaced collector regions. The polarity of a perpendicularly applied magnetic field determines deflection of the carriers toward one or the other of the collector regions. The columnating means comprises a pair of spaced auxiliary collector regions intermediate the emitter region and the primary collector regions for collecting carriers not within a central angle or cone. A columnated beam is provided by carriers passing between the auxiliary collectors within the central angle or cone. Trimming of the beam is provided by a selectable electric field applied in the same direction as deflection of the carriers to thus control the amount of beam deflection and insure that the beam is directed toward the one or other primary collector.
Herman P. Schutten - Milwaukee WI Robert W. Sackett - Milwaukee WI Jan K. Sedivy - Elm Grove WI Michael E. Taken - Cedarburg WI
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
H02M 502
US Classification:
363 9
Abstract:
A single to multiphase AC frequency conversion technique is provided by alternately switching between a pair of AC power lines at a plurality of sets of coordinated but irregular times to yield a plurality of chopped sinusoid switched output waveforms each of a given frequency phase shifted from each other.
Single Phase To Polyphase Bridge-Type Frequency Multiplier
Herman P. Schutten - Milwaukee WI Robert W. Sackett - Milwaukee WI Jan K. Sedivy - Elm Grove WI Michael E. Taken - Cedarburg WI
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
H02M 502
US Classification:
363 9
Abstract:
A single to multiphase AC frequency conversion technique is provided using H-switches. A plurality of H-switches are toggled in a composite coordinated but irregular timing pattern under control of logic means to yield a plurality of chopped sinusoid switched output waveforms each of a given frequency phase shifted from one another.
H-Switch Start-Up Control And Frequency Converter For Variable Speed Ac Motor
Herman P. Schutten - Milwaukee WI Robert W. Sackett - Milwaukee WI Jan K. Sedivy - Elm Grove WI Michael E. Taken - Cedarburg WI
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
H02P 534 H02M 502
US Classification:
318808
Abstract:
A simple combinational technique is disclosed using one or more H-switches for start-up control and frequency conversion in an AC motor. A coordinating logic system provides H-switch toggling timing patterns yielding phase shifted voltage waveforms in the motor windings to afford a rotating field during start-up, and provides irregular switching times yielding a chopped sinusoid output waveform of converted frequency for variable speed operation.
Herman P. Schutten - Milwaukee WI Robert W. Sackett - Milwaukee WI Jan K. Sedivy - Elm Grove WI Michael E. Taken - Cedarburg WI
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
H02M 502
US Classification:
363157
Abstract:
An AC frequency conversion technique is disclosed using an H-switch toggled at irregular times to yield a chopped sinusoid output waveform of a given fundamental frequency. The irregular switching pattern is a departure from the classical cycloconverter frequency conversion approach. The H-switch is connected between a pair of power lines L1 and L1 and alternately switched between one and another ON state at any point in the AC cycle to yield any up-converted or down-converted output frequency of the chopped sinusoid output waveform. The output waveform has a positive half cycle during which the H-switch is in one ON state when L1 is positive with respect to L2 and is in the other ON state when L2 is positive with respect to L1. The output waveform has a negative half cycle during which the H-switch is in the one ON state when L1 is negative with respect to L2 and is in the other ON state when L2 is negative with respect to L1.
Herman P. Schutten - Milwaukee WI Robert W. Sackett - Milwaukee WI Jan K. Sedivy - Elm Grove WI Michael E. Taken - Cedarburg WI
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
H02M 534
US Classification:
363177
Abstract:
A simple rectified AC frequency conversion technique is provided by chopping positively and negatively rectified AC signals by alternatively switching therebetween to yield a switched output waveform of given frequency without capacitive filtering to DC. The direct AC switching provides an irregular chopped sinusoid output waveform.
