Kone Corporation

Pasi Rinnesaari

Pasi Raassina

Juhamatti Nikander

Ari-Pekka Lahtinen

Ari Kattainen

Arto Nakari

Olli Pokkinen

Pasi Ahonen

Ari-Ekka Lahtinen

A method and an elevator for moving an elevator car to a landing floor in case of a predefined event related to a main electrical power supply of an elevator are disclosed. The method includes charging energy from the main electrical power supply into an external electrical energy storage prior to detecting the predefined event related to the main electrical power supply, controlling an operation of an electric motor for moving the elevator car with an electrical drive to decelerate the elevator car and to produce regenerative electrical energy, selectively utilizing said energy charged from the main electrical power supply into the external electrical energy storage and said produced regenerative electrical energy to maintain an elevator brake in deactivated state.

Method, elevator control unit and elevator for moving an elevator car to landing floor in case of event related to main electrical power supply of the elevator

A motor drive includes a rectifier bridge for connection with mains, a converter bridge configured to connect with an elevator motor and an intermediate DC circuit in-between. A capacitor and/or battery is connected between positive and negative branches of the intermediate DC circuit. At the mains side of the rectifier bridge a controlled main relay with contacts are configured to connect or disconnect the rectifier bridge with the corresponding mains phase. The motor drive comprises a charging circuit which comprises a charging switch connected with a current limiting component. The motor drive comprises a voltage sensor between positive and negative branches of the intermediate DC circuit. The voltage sensor is connected to a circuit comprising a reference value and a comparator. The evaluation circuit is configured to compare the actual sensor signal of the voltage sensor to the reference value and to operate the main relay based on the comparison.

Motor drive

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Helsinki, Finland

Pasi Rinnesaari