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Magnetic coupling arrangement in BLDC. 

Magnetic coupling arrangement in BLDC. 

Source publication
Figure 1. Magnetic coupling arrangement in BLDC. 
Figure 2. Arrangement of PMDC motor run by PV module coupled with a pump. 
Figure 3. Modified permanent magnets arrangement in the stator. 
Figure 4. (a) Net magnetomotive force in case of a conventional PMDC...
+10 Figure 5. (a) Modified shaft with the rotor assembly; (b) Rotor slots...
Development and modification of permanent magnet brushed DC motor for hybrid photovoltaic-operated solar systems
Article
Full-text available
  • Sep 2015
A modified brushed permanent magnet DC (PMDC) motor has been developed and fabricated for a photovoltaic (PV)-operated solar systems. The conventional PMDC motor has been plagued with constraints, the most critical being ingestion of vapours of working fluid inside the rotor and stator, damaging the insulation of windings and forming a thin film of...
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Contexts in source publication

Context 1
... Description of first-and second-generation solar pumps During 1980s the designed solar pumps were of first generation. The DC motor was having a set of brushes and it was directly connected to the input shaft of a pump as shown in Figure 1. ...
Context 2
... test the modified PMDC motor and pump under field conditions, a hybrid photovoltaic thermal (PVT) water heating system was used. The photograph of fabricated hybrid PVT water heater is shown in Figure 10. The fabricated system consists of three components namely PV-integrated flat plate collectors, water storage tank and DC water pump. ...
Context 3
... connection between the two flat plate collectors (series and parallel) could be changed in a controlled way by two check valves provided. The schematics of these two connections are shown in Figure 10. Each collector has an effective area of 2.0 m 2 . ...
Context 4
... this system, the modified DC motor pump has been used to circulate the water in the forced mode. The actual photograph of the experimental set-up is shown in Figure 11. ...
Context 5
... versus speed characteristics of the modified motor were obtained at no load. The characteristic shows that on increasing the voltage gradually, the speed of the modified motor varies linearly as seen in Figure 12. ...
Context 6
... on-load performance characteristics of the motor obtained is shown in Figure 13. ...
Context 7
... flow rate of water by the PMDC motor-driven pump is shown in Figure 14. It is seen that on a particular day at 10:00 h, the flow rate is 15.32 l/min while it goes up to 17.5 l/min around 13:00 h. ...
Context 8
... water flow rate in litres per minute was recorded at different solar intensities during the sunshine hours. The characteristics so obtained have been shown in Figure 14. ...
Context 9
... has been established that thermal efficiency in forced circulation mode is higher as compared to natural circulation mode. It is observed that thermal efficiency of the system with PVT-and PMDC- driven pumps in forced circulation mode is of the order of 50% as shown in Figure 15. ...

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