Protection arrangement of an electric motor

Details Protection arrangement of an electric motor Protection arrangement of an electric motor

2011-04-19

2011-04-19

Benson, Walter (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Responsive to thermal conditions

C318S471000, C318S445000

Reexamination Certificate

active

07928679

ABSTRACT:
Thermistor monitoring arrangement of an alternating-current electric motor controlled by a power transformer, such as a frequency converter, for at least one thermistor monitoring the temperature of the motor, in which is a power transformer (200), in which is a power stage (203) and a control unit (204), controlling an alternating-current electric motor (201) provided with a thermistor (202), and into which power transformer, such as a frequency converter, an input circuit connected to a thermistor located in the motor is integrated, to which input circuit a safety circuit (a so-called Safe Stop circuit) that prevents unexpected starting or ensures safe stopping of the frequency converter is connected.

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patent: 3-36985 (1991-02-01), None
patent: 11-239688 (1999-09-01), None
patent: 2003-348883 (2003-12-01), None

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