!The torque of a PM Sinusoidal BLDC motor may be expressed as: 31 Ea T= -...

   

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!The torque of a PM Sinusoidal BLDC motor may be expressed as: 31 Ea T= - sin ß (i) Using the equivalent circuit and phasor diagram assuming sinusoidal terms for a lossless, PMDC motor, derive the equation. (ii) For fixed torque angle, ß, show that the motor has de motor characteristics. (iii) What angle B gives highest efficiency? (iv) Explain why E/co, should be replaced by a factor k. !The torque of a PM Sinusoidal BLDC motor may be expressed as: 31 Ea T= - sin ß (i) Using the equivalent circuit and phasor diagram assuming sinusoidal terms for a lossless, PMDC motor, derive the equation. (ii) For fixed torque angle, ß, show that the motor has de motor characteristics. (iii) What angle B gives highest efficiency? (iv) Explain why E/co, should be replaced by a factor k.