tailieunhanh - Lightweight Electric Hybrid Vehicle Design Episode 9

Tham khảo tài liệu 'lightweight electric hybrid vehicle design episode 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Battery fuel-cell EV design packages 133 rpm and maximum torque 193 Nm at zero rpm. Regenerative braking comes from the motor acting as a generator so recharging the battery. The supply from the sodium-sulphur battery is fed along special heavy-duty cables to the power electronics centre PEC which is housed in the engine compartment. The candy-striped red-on-black cables are strikingly marked to avoid confusion with any other wiring in the van. Encased in aluminium the PEC incorporates the battery charging electronics and inverters that convert the 330 volt DC supply to AC power. It also includes a transformer which enables a 12 volt auxiliary battery to be recharged from the high voltage traction batteries. The electrical supply to the PEC is connected and isolated by power relays inside a contactor box controlled by the ignition key and the electronic modules. On-board microprocessors are linked by a multiplex database that allows synchronous highspeed communication between all the vehicle s systems. The vehicle system controller VSC acts as the user vehicle interface and is operated by electrical signals from the accelerator pedal. This drive-by-wire system has no mechanical connection to the speed controller. It is supplemented by a battery controller that monitors the sodium-sulphur operating temperature the state of charge and recharging. The control system also incorporates a diagnostic data recorder which stores information from all the on-board electronic systems. This locates any operational malfunctions quickly and precisely. A fault detection system known as the power protection centre PPC has also been built into the battery controller to monitor continuously the main electrical functions. Every 4 seconds it checks for internal and external leakage between the high-voltage system the vehicle chassis and the battery case. Should a leak be detected in any wire a warning light tells the driver that service action should be taken. The vehicle can then be .