I will keep it short and sweet.
BLDC (Brushless DC Motor) Vs PMSM (Permanent Magnet Synchronous Motor)
They are similar except for the way the windings are constructed such that PMSM provides a sinusoidal back-emf whereas BLDC a trapezoidal back-emf.
In general literature, as well as marketing it says that PMSM produces higher ripple free torque compared to BLDC. However looking at the equations:
[PMSM]
Torque = (3/2)*Ke*Ip
[BLDC]
Torque = 2*Ke*Ip
Where Ke is the sum of the back-emfs of each phase divided by the ω, the angular velocity of the rotor I'm guessing.
So Torque in the PMSM motor is 1.5 times the Ke*Ip and in BLDC it is twice.
BLDC (Brushless DC Motor) Vs PMSM (Permanent Magnet Synchronous Motor)
They are similar except for the way the windings are constructed such that PMSM provides a sinusoidal back-emf whereas BLDC a trapezoidal back-emf.
In general literature, as well as marketing it says that PMSM produces higher ripple free torque compared to BLDC. However looking at the equations:
[PMSM]
Torque = (3/2)*Ke*Ip
[BLDC]
Torque = 2*Ke*Ip
Where Ke is the sum of the back-emfs of each phase divided by the ω, the angular velocity of the rotor I'm guessing.
So Torque in the PMSM motor is 1.5 times the Ke*Ip and in BLDC it is twice.