US 12,291,428 B2
Control device for a passenger transport system
Alexander Prenner, Pöttsching (AT)
Assigned to Inventio AG, Hergiswil (CH)
Appl. No. 18/252,170
Filed by INVENTIO AG, Hergiswil (CH)
PCT Filed Nov. 3, 2021, PCT No. PCT/EP2021/080470
§ 371(c)(1), (2) Date May 8, 2023,
PCT Pub. No. WO2022/101066, PCT Pub. Date May 19, 2022.
Claims priority of application No. 20207875 (EP), filed on Nov. 16, 2020.
Prior Publication US 2023/0406675 A1, Dec. 21, 2023
Int. Cl. B66B 25/00 (2006.01); H02P 27/06 (2006.01)
CPC B66B 25/00 (2013.01) [H02P 27/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An electrical control device for controlling a drive of a passenger transport system that can be switched between load operation and idle operation, wherein the passenger transport system comprises an escalator or moving walkway and includes a three-phase drive motor, the electrical control device comprising:
a three-phase mains voltage connection for supplying a three-phase mains voltage;
a frequency converter that can be controlled at least with regard to a frequency of a three-phase output voltage;
a controllable switching device having:
a load operation switching state in which three phases of the three-phase drive motor can be coupled to three phases of the three-phase mains voltage connection, and
an idle operation switching state in which the three phases of the three-phase drive motor can be coupled to the three phases of the frequency converter,
wherein the three-phase drive motor is supplied with the three-phase mains voltage in the load operation switching state and with the three-phase output voltage of the frequency converter in the idle operation switching state,
wherein the frequency converter is supplied via at least one phase the three-phase mains voltage connection and a neutral conductor of the three-phase mains voltage connection.