公开(公告)号：US11661313B2

公开(公告)日：2023-05-30

申请号：US16001052

申请日：2018-06-06

申请人： KONE Corporation

发明人： Pasi Raassina ,  Pekka Hytti ,  Arto Nakari ,  Ari Kattainen ,  Juhamatti Nikander ,  Olavi Vairio

IPC分类号： B66B5/00 ,  H02P29/02 ,  B66B5/02 ,  B66B1/30 ,  H02P29/024 ,  B66B11/04 ,  G05B19/048

CPC分类号： B66B5/02 ,  B66B1/30 ,  B66B5/0031 ,  B66B11/043 ,  G05B19/048 ,  H02P29/0241

摘要： A drive device of an elevator includes a frequency converter to be connected to a public AC supply network and an elevator motor. The frequency converter includes a network rectifier configured to be connected to the AC supply network, a motor bridge to be connected to the elevator motor and a DC intermediate circuit located between the network rectifier and the motor bridge. The motor bridge is controlled by a control circuit which feeds the motor bridge with control pulses to regulate the motor speed. The drive device further includes at least one drive prevention circuit connected between the control circuit and the motor bridge. The drive prevention circuit is configured to obtain a safety signal from an elevator safety circuit includes two separate safety input circuits each configured to be connected to the elevator safety circuit to receive a safety signal. Each of the safety input circuits is configured to interrupt the connection between the control circuit and the motor bridge in response to the safety signal status.