Abstract
In the traditional split ratio optimization of double-sided rotor permanent magnet motors (DSRPMM), the typical thermal constraint condition is that the total copper consumption of the motor is fixed. This method can only constrain the overall temperature rise of the motor to a certain extent, but it is limited to restrain the local short-time heating of the winding. On the basis of the heat dissipation mode and external size of the motor, an optimal design method of the split ratio based on copper consumption density and current density is presented in this paper. The method restricts the whole heating of the motor and the local short-time heating of the winding by limiting the copper consumption density and current density. The thermal is used as the electromagnetic torque boundary. By analyzing the relationship between the electromagnetic torque and the split ratio, the expression of the optimal split ratio based on the maximum electromagnetic torque is derived. The analysis model is established by using the finite element tool, and the accuracy of the expression is proved. Based on the analysis results, a DSRPMM prototype is made and the experimental test is carried out. The experimental results of the prototype demonstrate the accuracy of the optimal design method of the split ratio based on copper consumption density and current density. The research of this paper provides a theoretical basis for improving the accuracy and reliability of the DSRPMM design.
Highlights
Permanent magnet motors (PMM) pursue high efficiency and wide speed range and have strict requirements on torque density and power density [1, 2]
On the basis of double-sided rotor permanent magnet motors (DSRPMM) heat dissipation mode, insulation grade, and external size, an optimal design method of the stator split ratio based on copper consumption density and current density is proposed. e method restricts the overall heating of the motor and the local short-time heating of the winding by limiting the copper consumption density and current density
When the flux density coefficient is constant, the optimal internal split ratio decreases with the increase of the number of poles, and the optimal external split ratio increases with the increase of the number of poles
Summary
Permanent magnet motors (PMM) pursue high efficiency and wide speed range and have strict requirements on torque density and power density [1, 2]. In [4], the design method for rational power allocation of internal and external windings of a double-stator PMM used for power distribution of hybrid electric vehicles is established, and the dimension equation and dimension parameter of the motor are analyzed. Under different magnetic loads of the motor, the optimal split ratio of the maximum output torque of the motor is changed. On the basis of DSRPMM heat dissipation mode, insulation grade, and external size, an optimal design method of the stator split ratio based on copper consumption density and current density is proposed. E internal law between the maximum output torque and the optimal split ratio of the motor under different magnetic loads is studied and analyzed. According to the design method proposed in this paper, a prototype is manufactured and tested. e test results of the prototype are consistent with the analytical calculation results and the finite element simulation results. e accuracy of the design method for DSRPMM proposed in this paper is verified, and it has certain theoretical value and engineering significance
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
