Motor Driver Hardware System Design Based On HP2

In recent years, hase invase our country, more people concerned aboutenvironment issues. Automobile exhaust is one of the main factors of producing haze.Therefore, Government and researchers pay more attention to the clean energy. Aspeople’s awareness of environmental protection, and the government subsidies forelectric cars, more people tend to buy electric cars. Currently mass production electriccar has been entering the market. Motor control system is the core of the electric car,motor driver plays a vital role in the control of the electric cars. Motor driver’ssuperiority and stability of performance determines the electric car’s performance andsafety. So improving motor driver’s performance is the direction of our research.This paper makes a comprehensive and detailed analysis of motor driver’stechnology based on Infineon HP2. First this paper describes the performance ofrepresentative electric cars and explains the advantages of the current electric cars andthe aspects to be improved. Secondly the paper introduces the motor driver’s keytechnology from several aspects. The first aspect analyzes how to select componentsand compares the two IGBT driver chip functional differences in detail, compares theeffects of the different resistance and capacitance of the IGBT gate for switchingcharacteristics, analyzes how to select the current sensor and introduces the threekinds of current sensor’s performance and differences. The second aspect introducesthe driver’s protection technology, when the motor driver is abnormal, the kind ofprotection technology can prevent to burn the module. The third aspect analyzes thecharacteristics of the motor driver isolated power, introduces the characteristics of thesingle-ended flyback switch mode power supply, describes the step of producing thetransformer and tests its performance. The sixth aspect makes theoretical calculationsfor the right DC-LINK capacitance and ripple current. The paper designs the overallstructure where the functional modules, the interface, and the DC-LINK capacitanceare integrated into.Finally we finish the design of the motor driver and build the testing platform of the permanent magnet synchronous motor. The experimental results show that thedriver’s performance is stable, the motor is running well. In the last part of this paper,pointing out the shortcomings of the motor driver and the next step’s work.