3 6 permanent magnet synchronous motor LSPMSM G A x( μ ) + A x y( μ ) = - J y s + σ A t 7-8 Γ A = LSPMSM A Γ 2 ν n - ν A 2 n = δ c LSPMSM A J s μ σ v

Size: px

Start display at page:

Download "3 6 permanent magnet synchronous motor LSPMSM G A x( μ ) + A x y( μ ) = - J y s + σ A t 7-8 Γ A = LSPMSM A Γ 2 ν n - ν A 2 n = δ c LSPMSM A J s μ σ v"

娘籴栾
7 years ago
Views:

1 ELECTRI C MACHINES AND CONTROL Vol. 6 No. 7 July δ δ = π δ = π δ = π δ TM 35 A 7-449X Armature reaction demagnetization analysis for line-start permanent magnet synchronous motor during start process LU Wei-fu LUO Ying-li ZHAO Hai-sen School of Electrical and Electronic Engineering North China Electric Power University Beijing 226 China Abstract To research the demagnetization of permanent magnet caused by the armature reaction during the start process of line-start permanent magnet synchronous motor LSPMSM the field-circuit-motion coupled time-stepping finite element method was adopted to analyze the influence of δ and the current amplitude on the permanent magnet working point flux density during the start process of LSPMSM where δ was the relative space position angle between the rotor permanent magnetic field and the armature synchronous rotating magnetic field. The armature reaction demagnetization characteristics under different load conditions were gained. Results show that at the moment of δ = π the demagnetization effect of the armature magnetic field on the permanent magnetic field is significant and the average working point flux density of permanent magnet is low. However the permanent magnet suffers more moments of δ = π during the start with heavier load and the lower permanent magnet flux density appears more times which make the magnet demagnetization more liable. Moreover the armature current amplitude decreases with speed rising and the permanent magnet flux density reaches the lowest point at the moment of δ = π close to the synchronous speed where the armature reaction demagnetization is more serious. Key words armature demagnetization field permanent magnet working point flux density relative position angle δ armature current amplitude time-stepping finite element method

2 3 6 permanent magnet synchronous motor LSPMSM G A x( μ ) + A x y( μ ) = - J y s + σ A t 7-8 Γ A = LSPMSM A Γ 2 ν n - ν A 2 n = δ c LSPMSM A J s μ σ v v 2 δ c δ c = H c n H c - - n G 22 kw Γ Γ 2 δ 电枢绕组 N S 转子铸铝导条 - 3 永磁体 LSPMSM 4-6 Fig. Quarter model of LSPMSM line - start 9 22 kw 8 LSPMSM Table 22 kw LSPMSM Parameters of LSPMSM of 22 kw /V 22 /mm 25 /mm 5. 3 /mm. 65 NdFeB - 33EH Fig. 2 2 Permanent magnet element subdivision 2 2.

3 7 3 δ 2 cosδ cosδ - π /2 < δ < π /2 cosδ > π /2 < δ < 3π /2 cosδ < 4 a b δ = π cosδ = cosδ = - 5 a cosδ = T 5 b. 2 T 3 a a(.8%s,.8535%t) b δ 3 c 4 δ.4 cosδ 5.2 b(.35%s,.952%t) 空间位置 /rad 转速 /(r min - ) 电枢磁场空间位置电角度永磁磁场空间位置电角度两磁场空间电角度之差啄 (a) 空载起动转速啄 /rad 3 仔 /2 仔仔 /2 - 仔 / (b) 磁场空间位置电角度 (c) 两磁场空间位置电角度之差啄 3 cosδ = - Fig. 3 Speed the relative position between armature magnetic field and permanent magnetic field during no-load start process a.5 cosδ = - 6 c -.5 b d c cosδ Fig. 4 4 cosδ Cosine value of relative position angle 3 ~ 5 cosδ 5 Fig Permanent magnet's average working point flux density during no-load start process δ = π cosδ = cosδ 6 a ~ 6 d 6 b A

4 32 6 转速 /(r min - ) 定子绕组电流 /A % (a) 起动转速 2% A 相电流 %5 电流向量幅值 % 5-5 -% -% (b) 定子电流转速 /(r min - ) 定子绕组电流 /A % 负载系数为负载系数为负载系数为 %5 % 5 (a) 起动转速负载系数为负载系数为负载系数为.5 cos%δ (b) 定子电流向量幅值 Fig c (c) cosδ c (d) 永磁体平均工作点磁密 cos δ Speed stator currents cos δ and the permanent magnet flux density during rated-load start process different loads 7 Fig a ~ 7 d cosδ δ 8 cos%δ (c) cosδ 负载系数为负载系数为负载系数为 (d) 永磁体平均工作点磁密负载系数为负载系数为负载系数为.5 Starting performance and the permanent magnet flux density during the start process under

5 7 33 ARKKIO A. Comparison of demagnetization models for finite-element analysis of permanent-magnet synchro- δ = π RUOHO S DLALA E 7 b 7 c nous machines J ZHOU P LIN D XIAO Y 永磁体区域磁密 /T.3.2. 负载系数为 -. 负载系数为负载系数为 KIM Kichan LIM Seungbin KOO Daehyun et al. The shape design of permanent magnet for permanent magnet synchronous motor Fig. 8 Permanent magnet flux density considering asynchronous effect alone during the start process under different loads considering partial demagnetization J. IEEE Transactions on Magnetics WANG J WANG W ATALLAH K et al. Demagnetization assessment for three-phase tubular brushless permanent-magnet machines 8 J. IEEE Transactions on Magnetics d 7. M M kw CHEN Weihua et al. Calculation of line-start permanent magnet motor minimal torque based on time- - - ZHANG Jian LUO Yingli δ stepping finite element method J - π /2 < δ < π /2 π /2 < δ < 3π /2 δ = π D. δ = π. IEEE Transactions on Magnetics et al. Temperature-dependent demagnetization model of permanent magnets for finite element analysis J. IEEE Transactions on Magnetics J GUO Wei ZHANG Chengning. Iron losses and transient temperature analysis of the permanent magnet synchronous motor for electric vehicles J. Electric Machines and Control ROSU M SAITZ J ARKKIO A. Hysteresis model for finite-element analysis of permanent-magnet demagnetization in a large synchronous motor under a fault condition J. IEEE Transactions on Magnetics M J Electric Machines and Control J LU Weifu LIU Mingji LUO Yingli et al. Demagnetization field a- nalysis and calculation for line-start permanent magnet synchronous motor during start process J. Proceedings of the CSEE. 29.

34 22 f t = f 0 w t + f r t f w θ t = F cos p - ω 0 t - φ 1 2 f r θ t = F cos p - ω 0 t - φ 2 3 p ω 0 F F φ 1 φ 2 t A B s Fig. 1

34 22 f t = f 0 w t + f r t f w θ t = F cos p - ω 0 t - φ 1 2 f r θ t = F cos p - ω 0 t - φ 2 3 p ω 0 F F φ 1 φ 2 t A B s Fig. 1 22 2 2018 2 Electri c Machines and Control Vol. 22 No. 2 Feb. 2018 1 2 3 3 1. 214082 2. 214082 3. 150001 DOI 10. 15938 /j. emc. 2018. 02. 005 TM 301. 4 A 1007-449X 2018 02-0033- 08 Research of permanent