Study Of Storage Battery Electric Locomotive’s Variable-Frequency Adjustable-Speed System Based On ARM

Electronic mechanical is the main transportation device in coal mine factory production. Among the most coal mine, battery electronic mechanical is until using DC motor as the drive. With the development of economic, improvement of advanced technology, continuous creation of theory research, today, DC motor speed adjust system is gradually disappeared in the application of coal mine factory’s transportation device. On the other hand, AC motor is widely applied in transportation system of coal mine factory by its excellent speed adjusting performance and the rapid development of electronic components and devices. What’s more, AC motor also has a lot of other advantages such as simple structure, high efficiency, without brusher and commutator, low costs. AC motor speed adjusting system is especially useful in the application in coal mine factory which environment is complex.In this thesis, discussed the application of electronic mechanical in mine shaft, put forward a improved strategy towards its critical technology and difference of process. The process of AC speed control system is three phase AC asynchronous motor, none speed sensor vector control arithmetic is adopted as the critical technology. The main topics of this thesis are the research and designation of variable frequency speed adjusting system which adopts advanced32-bit ARM as the micro controller. Transplanting embed operating system μC/OS-Ⅱ to ARM which manages the whole application program, applying approximated PWM technology-combination of SVPWM(space vector pulse width modulation) and AC motor which has lots of advantages such as lower of output rotation torque, higher usage rate, reduced harmonics of output current and harmonic loss of AC motor, adapting to high performance variable frequency speed adjusting system. Realized speed closed loop and magnetic field-oriented control through using of SVPWM none speed sensor rotor magnetic filed-oriented vector control system and adopting rotational speed estimation which based on reference model self-adaptation. Put forward voltage space vector control technology through analyzing mathematic model of AC motor. Simultaneously created simulation model with Matlab software and analyzed the output waveform of simulation result.Hardware and software designation and development of variable frequency speed adjusting of battery electronic mechanical is mainly discussed in this thesis. The core structure and functional module of LPC1768which is the core of hardware designation are introduced. Other circuits of hardware designation such as main power circuit, control circuits, drive circuit of power electronic devices, sample circuits and system protection circuits are also discussed. About software designation of this system, transplanted an operating system μC/OS-Ⅱ based on traditional PWM control algorithm which manages operating of each program module. Meanwhile μC/OS-Ⅱ related knowledge is also introduced in this essay. Firstly, designed, created and analyzed the simulation model. Secondly, built the hardware platform in the laboratory and verified the SVPWM vector control algorithm.At the end of this thesis, summarized and analyzed the whole essay, pointed out the main works and creation, discussed the defects of this thesis, given further research direction.