DSP Circuit Design and Manufacturing for Rotor Position Discovering of Sensorless Motor - Generator Switched Reluctance Motor using Amplitude Modulation in Motor Mode

Authors

1 Department of Electrical Eng., Faculty of Technical & Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran

2 Department of Electrical Eng., Islamshahr branch, Islamic Azad University, Islamshahr, Iran

3 Department of Electrical Eng., Shahid Beheshti University G.C., Tehran, Iran

Abstract

This paper presents a new scheme for the start up and control of a sensorless switched reluctance motor- generator using an auxillary field in motor mode. The proposed motor-generator is 4 to 2 with rotors of different geometric shapes and has two separate layers with a stator and rotor used in each layer. The main idea is that a high-frequency low amplitude sinusoidal pulse is injected to phase and a phase current feedback is achieved. Using AM demodulation, phase current waveform is obtained and thus rotor position is discovered. A sinusoidal digital signal is generated by digital signal processor (DSP) which is then given to digital to analog converter (D / A). Then it is applied to the auxiliary motor and its effect on motor phases is sampled by the analog to digital converter (A / D) where after processing by the DSP, commands necessary to fire are sent to phase transistor gate. In addition, delays are compensated and lagging is also investigated.

Keywords

References

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