| Title |
A Study on Efficiency Improvement of Power Conversion System for Escalator |
| DOI |
10.6113/TKPE/2016.21.6.525 |
| Keywords |
Efficiency improvement; Inverter; Escalator; Power conversion system; Motor; Generator |
| Abstract |
In the case of a motor system that converts electrical energy into mechanical energy, the region of the motor and that of the generator coexists. In the case of an escalator, the ascending escalator is operated by the motor, whereas the descending escalator is operated by the generator according to the load. To evaluate the proposed method, this study reduces the power of the ascending escalator up to approximately 35% by sharing the regeneration power of the descending escalator. The loss of transfer power nearly exists in the case of the proposed method. Furthermore, the lifetime of the DC link condenser can be extended because it is connected in parallel, thus leading to a twofold increase in capacity. |