Integrated soft starter for electric motor

A solid state motor starter (10), commonly referred to as a soft starter, is constructed in a manner to be easily manufacturable while at the same time combining all the required components in a relatively small package. A solid state power switch (46, 48) is clamped between a pair of bus bars (32,...

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Hauptverfasser: VON ECKROTH, KURT, WIELOCH, CHRISTOPHER JOHN, BECKER, JAMES ALLEN
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Sprache:eng ; fre ; ger
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WIELOCH, CHRISTOPHER JOHN
BECKER, JAMES ALLEN
description A solid state motor starter (10), commonly referred to as a soft starter, is constructed in a manner to be easily manufacturable while at the same time combining all the required components in a relatively small package. A solid state power switch (46, 48) is clamped between a pair of bus bars (32, 42) in an offset manner to accommodate a discrete switching relay (50) mounted in an inverted manner between the line input (36) and the bus bar in communication with the load outputs (44). When in a motor run mode, current is shunted away from the solid state power switching device (46, 48) and through the switching relay (50), a substantially linear current path is achieved to reduce power loss and heat buildup. The arrangement allows for a heat sink (64) mounted to one of the bus bars (32, 42) with adequate spacing between the heat sink (64) and the discrete relay (50) for insertion of a cooling fan (66). Current sensing is achieved with a Hall effect sensor (130) mounted to the bus bar (32, 42) in a small current sensing region (116) that is created by having a pair of slots (104, 105) in the bus bar (32, 42) to direct current. A pair of magnetic pins (124) extend perpendicular from the bus bar (32, 42) to create the magnetic flux for the Hall effect sensor (130) to sense current flow through the current sensing region (116). The Hall effect sensor circuit board (132) also contains a thermistor (134) which is mounted with adequate insulation (150, 154) yet in thermal communication with the bus bar (32, 42).
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A pair of magnetic pins (124) extend perpendicular from the bus bar (32, 42) to create the magnetic flux for the Hall effect sensor (130) to sense current flow through the current sensing region (116). 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A pair of magnetic pins (124) extend perpendicular from the bus bar (32, 42) to create the magnetic flux for the Hall effect sensor (130) to sense current flow through the current sensing region (116). 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A pair of magnetic pins (124) extend perpendicular from the bus bar (32, 42) to create the magnetic flux for the Hall effect sensor (130) to sense current flow through the current sensing region (116). The Hall effect sensor circuit board (132) also contains a thermistor (134) which is mounted with adequate insulation (150, 154) yet in thermal communication with the bus bar (32, 42).</abstract><oa>free_for_read</oa></addata></record>
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language eng ; fre ; ger
recordid cdi_epo_espacenet_EP1838142B1
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subjects APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS
BASIC ELECTRIC ELEMENTS
CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS
CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS
CONTROL OR REGULATION THEREOF
CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC SWITCHES
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
GENERATION
MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
PRINTED CIRCUITS
RELAYS
SELECTORS
TESTING
title Integrated soft starter for electric motor
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