Due to this configuration, reluctance torque and magnetic torque can be utilized to the upmost while torque ripple is suppressed, and a low-cost rotary electric machine can be obtained with simple processing. patents-wipo This configuration makes it possible to reduce the intensity of the reverse...
This work addresses the problem of speed control for switched reluctance motors (SRM) used in electric vehicles, with a focus on minimizing torque ripple by optimizing the current reference shape. This issue is formulated as a constrained optimization problem, particularly difficult due to the nonline...
diameter provides a larger stator slot area. The stator MMF can be increased when compared to a conventional motor with the same winding pattern as the conventional motor. This further increases the air gap flux density level, as well as reducing the slot ripple harmonic magnitude and rotor ...
The Abstract is provided to comply with 37 C.F.R. § 1.72(b) to allow the reader to quickly ascertain the nature and gist of the technical disclosure. The Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. ...
‘twisted-slot’ motors, but this reduction in cogging comes at a cost. Twisted slot motors have lower efficiencies because the ends of each rotor slot overlap the stators slots, meaning there is less area for the magnetic fields to interact when driven (which is also what reduces the ...
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The ripple in accelerations is caused by cogging forces of the actuator (no feedforward/cogging compensation is active during this experiment). 7.4. Repeatability As the system is free of play and friction (and therefore free of self-locking and limit cycling), the repeatability of the system ...
This separation causes a ripple current at each of the first coils and the second coils that are out of phase with each other. This out of phase ripple current attenuates the ripple that is present at the circuit power supply. Accordingly, the magnetometer of this invention provides dual ...
Compared with the existing torque pulse based methods, the estimated rotor position during the process of current pulse injection tracks the rotor movement, meaning that the rotor position does not need to be estimated again after polarity detection. In addition, by selecting the amplitude of the ...
Compared with the existing torque pulse based methods, the estimated rotor position during the process of current pulse injection tracks the rotor movement, meaning that the rotor position does not need to be estimated again after polarity detection. In addition, by selecting the amplitude of the ...