| 摘要 |
PURPOSE: To expand the operating range of an electric brake and at the same time to minimize the variation of the abrasion of a brake shoe in organization, a vehicle unit or the like. CONSTITUTION: The difference between command brake force and electric brake force such as regenerative braking is found by a supplementary brake command device 11, and a shortage is supplemented by air brake devices 4, 5, 6. On the other hand, the integrated values B1, B2, B3 of supplementary brake force are sought by the supplementary brake force integrator of each of control devices 1, 2, 3, and the mean value is found by a mean-value computing device 7 for the integrated value of supplementary brake force. The mean value is given to the computing device 13 of each of the control devices 1, 2, 3, and the differences between the mean value and the integrated values B1, B2, B3 is found in ratio. A multiplier 14 multiplies the output of the computing device 13 by a factor (k) to give it to a means for suppressing the electric brake force such as a trolley wire voltage limiting circuit 15. The trolley wire voltage limiting circuit 15 changes a limit value Vc on the basis of the output of the multiplier 14 to change the suppression quantity of an electric brake. |
