English Manual; 1/Operation Description Of Ers 2G - epic power ERS 2G Manual De Instalación

ERS 2G

English manual

1/OPERATION DESCRIPTION OF ERS 2G

Fig. 6 shows the block diagram of an electrically operated elevator with a variable
voltage drive (VVVF).
Fig. 6. Block diagram description of the electrical traction system of an elevator
Depending on the control variables, the load and the selected trajectory, the lift may
consume energy or recover energy. In the first case, the lift absorbs energy from the
mains, as it can be seen in Fig. 7.a, whereas in the second case, the energy that the
motor generates while braking is dissipated in a braking resistor as heat, Fig. 7.b.
Three-phase mains
Braking resistor
VVVF
Motor
Three-phase mains
Braking resistor
VVVF
Motor
a.
Fig. 7. Energy Exchange in a lift
Instalation guide
Three-phase mains
Braking resistor
VVVF
Motor
b.
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