PV-Battery Powered Direct Torque ControlledSwitched Reluctance Motor Drive

ABSTRACT:

Categorized as one of the renewable energies, Photo- Voltaic system has a great potential compared to its counterparts of renewable energies. This paper deals with the design of a Photovoltaic (PV)-Battery fed Switched Reluctance Motor(SRM). The system mainly composed of a PV module, boost converter, rechargeable battery, bidirectional converter, asymmetric bridge converter, SRM and system controllers. The main problems of SRM are high torque ripple, acoustic noise and vibration problems. In order to reduce these problems, a new direct torque control of 3.5 kW 8/6 SRM is proposed, which is simple and can be implemented with low cost processor. It can be seen from the simulation results that this scheme has well regulated the torque output of the motor with in hysteresis band. The proposed system assures its suitability for solar applications like solar vehicles, solar water pumping system and floor mills in hilly and isolated areas.

KEYWORDS:

1.      PV module

2.      Switched reluctance motor

3.      Direct torque control

4.      Battery energy storage system

SOFTWARE: MATLAB/SIMULINK

 BLOCK DIAGRAM:

Figure 1. (a)PV-Battery fed Induction Motor drive (b) PV-Battery Switched Reluctance Motor drive

 EXPECTED SIMULATION RESULTS:

Figure 2. Variation of PV output voltage and current due variation in solar

Radiation

Figure 3. Control of flux vector with in hysteresis band

Figure 4. Flux trajectory in d-q plane

Figure 5. Current waveform of different phases

Figure 6. Control of torque in hysteresis band

Figure 7. Flux waveform of different phases

CONCLUSION:

The proposed scheme reduces dc link voltage there by reducing capacitor size and insulation level. A single stage conversion is also possible without the use of boost converter. The advantage of using asymmetric bridge converter is freedom to control individual phase independently and no shoot through fault. Torque ripple in the SRM can be eliminated by Direct Torque Control technique. The results indicate that DTC of SRM can directly regulate the torque output of the motor within a hysteresis band.

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