Design and Simulation of An Elevator DC Motor Drive with Cascaded Position, Speed and Current Control
| dc.contributor.advisor | Mengesha, Mamo (PhD) | |
| dc.contributor.author | Samuel, Tamana | |
| dc.date.accessioned | 2019-01-16T11:36:00Z | |
| dc.date.accessioned | 2023-11-28T14:20:30Z | |
| dc.date.available | 2019-01-16T11:36:00Z | |
| dc.date.available | 2023-11-28T14:20:30Z | |
| dc.date.issued | 2018-10 | |
| dc.description.abstract | An elevator drive control system design is very important in the elevator performance profiles for the safety and comfort of passengers. These profiles include the slowly accelerating to maximum recommended speed, smoothly running with specific constant speed, then safely decelerating and braking to stop when elevator reaches the desired elevator position. The safety and performance of elevator are highly related to the design and control of its drive system. The aim of this thesis is to design a cascaded position, speed and current controlled electric elevator drive system to achieve smoothly operating elevator drive system which increases the accuracy and precision with which the elevator system responds to position commands. Before going to the step by step design procedures for creating a cascaded control system the literature review of theories and backgrounds behind the elevator evolution and drive system, and also the mathematical modeling of the permanent magnet DC motor parameters and the regenerative elevator kinematics with load are discussed in detail. Then, design aspects such as modeling the convertor, tuning parameter of a control system to direct the motor as desired are carried out. Also analyzing the control performance of the system with and without cascaded control system through use of computer simulations has been investigated in this thesis work. Finally, the cascaded position, speed and current controlled elevator DC motor drive has been modeled in MATLAB Simulink and simulation studies are carried out. The simulation results demonstrate that the proposed control results in 0% over-shoot for the desired positions of 4m and 40m with corresponding speeds of 0.8 m/s and 2m/s, respectively, during lifting and lowering full load tests. Zero %-overshoot results also achieved through smooth acceleration and deceleration with maximum starting and breaking torques of 12NM and 17.5NM for the desired positions of 4m and 40m respectively. This illustrates that the designed cascaded controller can effectively and efficiently control the elevator drive operation with passenger comfort in respect of smooth driving system. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/15774 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Permanent magnet DC motor | en_US |
| dc.subject | cascaded control system | en_US |
| dc.subject | Position | en_US |
| dc.subject | Speed | en_US |
| dc.subject | Current control | en_US |
| dc.title | Design and Simulation of An Elevator DC Motor Drive with Cascaded Position, Speed and Current Control | en_US |
| dc.type | Thesis | en_US |