BLDC_Trapezoidal PMAAaaaaaaaaaaaaaaC.pptx

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1. Brushless DC Motor or Trapezoidal PMAC Motor Construction Different types of BLDC Motors Operation Comparison with Conventional DC Motor Advantages Disadvantages Applications

2. Constructional Details of BLDC Motors It is a polyphase synchronous motor with permanent magnet rotor Major parts: AC motor Solid state inverter Rotor position sensor AC Motor: Stator: Poly phase – Concentrated winding Rotor: Permanent magnet with no winding Solid state inverter: Power Electronic Converter used to convert DC to AC, in general VSIs Rotor position sensor Hall effect sensors

3. Different types of BLDC Motors Three Phase Three Pulse BLDC Motor Three Phase Six Pulse BLDC Motor

4. Three Phase Three Pulse BLDC Motor

5. Three Phase Six Pulse BLDC Motor

6. Operation of BLDC Motor Three Phase Three Pulse BLDC Motor

7. Three Phase Six Pulse BLDC Motor

8. Comparison between BLDC motor and Conventional DC motor

9. Comparison between BLDC motor and Conventional DC motor BLDC Motor Less maintenance Long life High reliability High Efficiency Low inertia and friction Less radio frequency interference and noise Conventional DC motor High maintenance Less life Less reliable Low Efficiency High inertia and friction High radio frequency interference and noise

10. Comparison between BLDC motor and Conventional DC motor BLDC Motor High Cost Less Starting torque Conventional DC motor Low Cost High Starting torque

11. Less maintenance Long life High reliability High Efficiency Low inertia and friction Less radio frequency interference and noise Better cooling of stator windings Advantages of BLDC

12. Disadvantages of BLDC High Cost Less Starting torque

13. Applications of BLDC Turn table drives for record players Hard disk drive for computers Small fans for cooling electronic Equipments Aircraft and satellite systems Traction