Braking controller for electric automobile

Abstract

Abstract PURPOSE:To miniaturize and lighten a mechanical braking means by ON-OFF controlling a switching element so that said element supplies an induction motor with a dynamic braking DC power when it receives a fault signal of said switching element. CONSTITUTION:If the title apparatus is in good order, switches 18a, 20a, 22a are connected to an output terminal side of a function generator 16 for normal travel and respective semiconductor devices 28a, 28b, 30a, 30b, 32a, 32b of a power converter 26 are ON-OFF controlled so that a motor drive corresponding to a torque command T is performed. If a fault detector 44 detects any trouble, a defective semiconductor device is decided and a DC braking mode is selected. On the basis of said decision and selection, the fault detector 44 changes the switches 18a, 20a, 22a to an output terminal side of the function generator 46. Consequently, a switching signal for DC braking of a motor 42 is obtained as the output of comparators 18, 20, 22.

Inventors

• 👤 Masashi Nakamura
• 👤 誠志 中村

Bibliographic Details