Dynamic braking resistor, dynamic braking resistor unit and electric drive type dump truck

摘要

PROBLEM TO BE SOLVED: To provide a dynamic braking resistor, a dynamic braking resistor unit and an electric drive type dump truck capable of increasing the heat transfer coefficient of the heat generating resistor and improving the heat dissipation performance. A dynamic braking resistor 100 converts electrical energy generated by regenerative braking into thermal energy, and has a band-shaped heating resistor 110 that is repeatedly folded back so as to have a constant interval P, and a heating resistor. The body 110 is provided apart from each other in the repeating direction, and includes a first side plate 122 and a second side plate 123 in which the heat generating resistor 110 is arranged. When the distance between the first side plate 122 and the heat generation resistor 110 adjacent thereto is m in the repeating direction of the heat generation resistor 110, the distance between the second side plate 123 and the heat generation resistor 110 adjacent thereto is m + P / n ( n is a natural number of 2 or more). [Selection diagram] Fig. 1