Vacon Oyj

Vacon Oy

Hans Carlsson

Lihua Sun

Kimmo Rajakangas

Antti Vuola

Mikko Kannisto

Paavo Merilinna

Frequency converter

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 (), in which is a power stage () and a control unit (), controlling an alternating-current electric motor () provided with a thermistor (), 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.

Protection arrangement of an electric motor

Growing community of inventors

Vöyri, Finland

Hans Carlsson