| Summary: | 碩士 === 國立臺北科技大學 === 電機工程系研究所 === 102 === In order to reduce the emission of carbon dioxide and improve the fuel consumption of conventional ICE vehicles, hybrid vehicle is one of the best solutions. Among the hybrid vehicles, mild-hybrid vehicle can improve fuel consumption effectively and achieve the goal of lower price. Hence this thesis is based on mild-hybrid vehicle’s belt integrated starter and generator (BSG), which is based on induction machine, to reach the key functions of cranking, power boosting, generating and regenerative braking. Among the functions, the first and second are operated in motoring mode and the others are operated in generating mode for the induction machine.
The proposed control structure is based on indirect field oriented control. Measuring and analyzing the electrical parameters of induction motor are necessary in the first part, then using torque control to yield the maximal torque for cranking the engine at idle mode. When the engine starts up, the induction machine will change into generating mode immediately and generate constant current based on the requirement of vehicle. Since the engine with turbocharger can’t provide enough torque in the low and medium speed, therefore the induction machine can provide instantaneous accelerate torque with high bandwidth. In addition, this thesis also proposes a method to avoid the induction machine can’t provide generating power due to failure of high-voltage battery. A careful control of both magnetizing current and generated voltage let the induction machine be in generation mode using the 12V battery to provide stable power.
Finally, the motor drive with a DSP TMSF320F28035-based control stage and power stage is built. A three-phase permanent magnet synchronous motor is used as the engine simulator to validate the proposed induction machine control strategies.
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