The invention relates to a transport conveyor drive having a rectifier and an inverter which are connected via a DC link, whereby the inverter comprises power switches for suppling electric power to an transport conveyor motor, comprising a motor controller for controlling the power switches of the inverter which is configured to produce control pulses in the control poles of the power switches, at least one safety signal interface, which is adapted to receive safety signals from a safety controller of the transport conveyor, and a brake control circuit having an output for supplying power to a brake coil of an electromagnetic brake, wherein the motor controller is referenced to a first bus bar in the DC link, at least one STO circuit is connected between the motor controller and each of the power switches of at least one half bridge of the inverter, the STO circuit being referenced to the first bus bar of the DC link and is configured to transfer/cut the control pulses to the power switches, a galvanically isolated power supply for the STO circuit is connected between the safety signal interface and the STO circuit, such that an output terminal of the isolated power supply is referenced to the same bus bar of the DC link as the motor controller, the isolated power supply being controlled via at least one safety signal received via the safety signal interface, and/or the brake control circuit comprising a transformer with a primary and a secondary side, the transformer primary side being referenced to a/the first bus bar (DC-, -) of the DC link and the secondary side being configured to be connected to a brake coil of an transport conveyor brake, and an isolated power supply is connected between the safety interface and the brake controller to supply power to the brake controller, whereby an output terminal of the isolated power supply is referenced to the same bus bar of the DC link as the brake controller.
TRANSPORT CONVEYOR DRIVE
2019-03-21
Patent
Electronic Resource
English
European Patent Office | 2016
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