Starter for a line start electric motor

A technology for starting a motor and a linear motor, applied in the field of a linear starting motor and controlling the above-mentioned starting device

Inactive Publication Date: 2005-08-17
SECOP GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The circuit disclosed by this US patent is not suitable for linear starter motors because there is no starting capacitor

Method used

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  • Starter for a line start electric motor

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Embodiment Construction

[0022] The drawing shows an electrical circuit of a linear starter motor 1 according to the invention. The linear starter motor 1 comprises two conductor branches 2 and 3 between which a slip coil 4 , also referred to as the main coil, is arranged. The slip coil 4 is supplied with current via connection lines 5 , 6 connected to contacts 7 , 8 of the power supply. A starting coil 12 is arranged between the conductor branch 3 and the further conductor branch 10 . Conductor branches 2, 3 and 10 are arranged at the top of an equilateral triangle. An operating capacitor 14 is arranged between the conductor branches 2 and 10 .

[0023] Starting from line branch 2 , starting capacitor 17 , PTC resistor 19 and switching device 20 are connected in series. The series connection of a starting capacitor 17 , a PTC resistor 19 and a switching device 20 is connected to the conductor branches 2 and 10 and is thus connected in parallel to the operating capacitor 14 . The dashed line 22 in...

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Abstract

A system (120) for preheating a bimetal protector (126) of a single phase motor (122) equipped with a first run capacitor (CR) and optionally a second run capacitor (CR-H). A first and optionally a second pair of normally closed fixed contacts (132;133) are operable by a bimetal element or disc (128).. There may be provided an optional first preheating element (134). A second preheating element (135) is supplied via the first or second run capacitor. The second pair of contacts (133) may connect the second heating element (135) to the first or second run capacitor (CR;CR-H). The first pair of fixed contacts are operable, so that the second heating element is supplied when the first pair of fixed contacts is open, i.e. at the occurrence of a locked rotor fault of the motor. A single bimetal disc may serve to open the first pair of fixed contacts (132) and to close the second pair of fixed contacts (133). The protector automatically resets after a controllable time delay following activation.The invention concerns a starter for a line start electric motor having at least one main winding ( 4 ) and at least one start winding ( 12 ) and which start winding is connected in series with a run capacitor ( 14 ) with which a start capacitor ( 17 ) and a PTC-thermistor ( 19 ) are connected in parallel. In order to make a simply constructed starter for a line start electric motor the start capacitor ( 17 ) and the PTC-thermistor ( 19 ) are connected in series with a switch mechanism ( 20 ). The series connected circuit made up of the start capacitor ( 17 ), the PTC-thermistor ( 19 ) and the switch mechanism ( 20 ) is connected in parallel with the run capacitor ( 14 ).

Description

technical field [0001] The invention relates to a starting device for a linear starter motor with at least one main coil and at least one starting coil connected in series with an operating capacitor, a starting capacitor and a PTC-resistor (thermistor) connected in parallel to the operating capacitor. [0002] The invention also relates to a linear starter motor with the above-mentioned starting device. The invention also relates to a method for controlling the starting device described above. Background technique [0003] US patent application US 2002 / 0190595 A1 discloses a linear starter motor in which a starting capacitor and a PTC resistor are connected in series with the operating capacitor and in parallel with the starting coil. The function of the PTC-resistor is to disconnect the power supply from the starting capacitor whenever the linear starter motor reaches a certain speed. It is proposed in this patent application that the PTC resistors can be replaced by cen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/50H01H61/00H01H81/02H02P1/42H02P1/44
CPCH01H81/02H02P1/445H01H2061/004H01H1/504H01H61/002
Inventor N·C·魏劳赫
Owner SECOP GMBH
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