Temperature field and heat load research for main propellant direct drive Permanent Magnet Motor of Unmanned Aerial Vehicle

Wang, Sen; Lv, Zongshu; Zhao, Yangyang; Yan, Hongkui; Ren, Yong; Xiao, Linyuan; Qiao, Guangzhou

doi:10.1109/icems.2014.7013900

Cited by 4 publications

(2 citation statements)

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“…Some assumptions [21] are given for the stator slot. Due to the unbalanced distribution of three-phase stator winding losses, each layer copper wire (not include paint film) can be equivalent to a thermal conductor, equivalent coefficient [22] of each kind insulating material can be calculated as…”

Section: Calculation Of Thermal Parameters 431 Equivalent Coefficiementioning

confidence: 99%

“…Some assumptions [21] are given for the stator slot. Due to the unbalanced distribution of three‐phase stator winding losses, each layer copper wire (not include paint film) can be equivalent to a thermal conductor, equivalent coefficient [22] of each kind insulating material can be calculated as

k_{eq} = \sum_{i = 1}^{n} δ_{i} / \sum_{i = 1}^{n} \frac{δ_{i}}{K_{i}}

where

k_{eq}

is equivalent thermal conductivity,

δ_{i} false(i = 1, 2, 3 \dots n false)

is the thickness of each conductor,

K_{i}

is average thermal conductivity of each thermal conductor.…”

Section: Temperature Distributions In Pmsm Under Inverter Healthy Amentioning

confidence: 99%

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Influence of direct‐connected inverter with one power switch open circuit fault on electromagnetic field and temperature field of permanent magnet synchronous motor

Lin

Gao

et al. 2018

IET Electric Power Applications

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For permanent magnetic motors, the faults in inverter may cause serious mechanical vibration, winding overheating, and thermal demagnetisation for the magnets. Thus, this study addresses the problem of the electromagnetic field and temperature distributions for permanent magnet synchronous motor (PMSM) under open circuit fault (OCF) in the upper switch of one phase. Firstly, taking a 12.5 kW 2000 r/min PMSM as an example, the 2D transient electromagnetic field-circuit coupling calculation model is established. Then the flowing paths of the three-phase currents in inverter are analysed before and after the OCF in the upper switch of one phase. Next, by using the finite-element method, the current harmonics, the electromagnetic torque, the rotating speed, and the losses in PMSM are investigated. Simultaneously, direct current component and torque pulsation are also derived. Based on the 3D temperature field, the temperature distributions in different parts of PMSM also are comparatively studied before and after this fault. Moreover, the temperature of permanent magnets, which is the part most seriously affected by the temperature, are further analysed. Finally, calculation and experimental tests prove the accuracy of the theoretical analysis. The obtained conclusions may provide some references for the limit operation and effective diagnosis for inverter faults.

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Section: Calculation Of Thermal Parameters 431 Equivalent Coefficiementioning

confidence: 99%