| 摘要 |
PROBLEM TO BE SOLVED: To reduce the loads due to preliminary excitation and to prevent electronic components from being damaged by storing first braking information during the acceleration-off driving state, and skipping to a regeneration damping processing without applying preliminary excitation on re-braking. SOLUTION: In an acceleration-off driving state until an accelerator 2 is turned on again, after it has been turned off while an electric car is driving, a control part 5 opens a regeneration contact and breaks power supply from a battery to an electric motor first braking operation is detected by a braking detection means 11. Then, a driving contact is switched and a field coil is switched to the excitation polarity of regeneration damping. Then, a preliminary excitation processing for feeding a weak current to a field coil is made, and a regeneration current based on the electromotive force of a boosted electric motor is returned to a battery. Furthermore, in the case of re-braking operation, a regeneration damping processing is carried out immediately made without performing any preliminary excitation processing. |
