| Penulis/Author |
Sigit Doni Ramdan (1); Ir. Eka Firmansyah, S.T., M.Eng., Ph.D., IPM. (2); Prof. Dr. Eng. Ir. F. Danang Wijaya, S.T., M.T., IPM. (3); Dr.-Ing. Ir. Yohan Fajar Sidik, S.T., M.Eng. (4); Musyaffa' Ahmad (5); Mudarris (6) |
| Abstrak/Abstract |
A pulse width modulation (PWM) rectifier
supplies direct current (dc) energy from an alternating current
(ac) generator source to other loads, including battery modules,
in a hybrid circuit. This rectifier has an essential function in the
overall hybrid system. Therefore, it is necessary to evaluate all
aspects of the rectifier, including power losses. This paper
considers the power losses of IGBT as the main component of
the rectifier. The relationship between IGBT losses and three
loading scenarios is given. The first load is the motor operating
at a 30% performance level with a 60 kW load, and the second
load is when the battery is charged at 60% performance with a
90 kW load. The third load is when both the motor and the
battery operate simultaneously at 100% maximum performance
level with a total load of 180 kW. The operation of hybrid trains
will be investigated. Based on the simulation result, losses at the
maximum designed capacity, 180 kW, each IGBT conduction
loss is around 580 watts, which is relatively small compared to
the amount of power produced. These power losses are close to
the losses in the diode. Based on the simulation result of each
IGBT switching loss, the value is 0.044 watts, which is relatively
small compared to the amount of power generated. This power
loss is close to the loss in diodes. Based on the IGBT loss analysis
above, the converter efficiency is 98.6% (30%), 98.7% (60%),
and 98.9% (100%). With the selected model, the IGBT shows a
temperature-controlled increase of 40 degrees Celsius, with the
voltage maintained at 600 V. The load scenario is directly
related to the resulting current and temperature, so the losses
can be analyzed. It is concluded that the higher the loading
power, the higher the IGBT temperature, along with the
increase in load. |
