tailieunhanh - Lightweight Electric Hybrid Vehicle Design Episode 3

Tham khảo tài liệu 'lightweight electric hybrid vehicle design episode 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 12 Lightweight Electric Hybrid Vehicle Design Fig. Motor specifications. Nelco electric 34 kW brush motor specification Voltage current Resistance inductance Field time constant Field volts amps Weight Efficiency Cooling Cost 1000 up Coercive systems 45 kW 5000 rpm BDC motor specification Voltage current frequency No. of poles Weight Efficiency at a. 1500 rpm 45 kW b. 3500 rpm 10 kW Cooling Cost 1000 up Coercive systems 45 kW 12 000 rpm BDC motor specification Voltage current frequency No. of poles Weight Efficiency at a. 3600 rpm 45 kW b. 5000 rpm 10 kW Cooling Cost 1000 up 216V177 A 45 milliohms 115 pH seconds 22 amps 80 kg rating 10-60 mins 86 at 34 kW 3000 rpm Air forced 600 batch prod. 230 V 130 A 666 Hz 16 45 kg rating continuous 96 95 Oil-2 litre min 1000 batch prod. 600 mass prod. 220 V 130 A 800 Hz 8 25 kg rating continuous 96 95 Oil-2 litre min 600 batch prod. enthusiasm must be tempered by two other considerations cost of materials and controller costs. The factors affecting selection are covered in Section . CHOPPER CONTROLLER FOR A 45 kWMOTOR Figure illustrates a typical pure battery electric vehicle scheme which could also be used in hybrid mode with an engine if required. The motor is a shunt field unit such as the Nelco Nexus 2 unit used in many industrial EVs. This machine is a 4 pole motor with interpoles and operates at a maximum voltage of200 V DC. The field supply is typically 30 amps for maximum torque. The controller consists of a 2 quadrant chopper with a switch capacity of 400 amps. An electromechanical contactor shorts out the positive chopper switch in cruise mode for maximum efficiency. The chopper is fitted with input RF filtering and precharge to extend contactor life. The chopper switches at 16 kHz and the output contains a small L C filter to remove the d v dt from the machine armature. A Hall effect DCCT measures the armature current for the control system. Current EV design approaches 13 Fig. Controller