TRƯỜNG ĐẠI HỌC SƯ PHẠM KỸ THUẬT TP HCM
Khoa :điện-điện tử
BÀI BÁO CÁO
MÔN:MÁY ĐIỆN ĐẶT BIỆT
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39.19 Switched Reluctance Motor (Động cơ từ trở chuyển mạch số)
The swiched reluctance (SR) motor operates on the same basic principle as a variable reluctance stepper
motor (Art 39.4).
Động cơ từ trở chuyển mạch số (SR) c nguyên lý hoạt động cơ bản tương tự như động cơ bước từ trở
biến thiên .
a) Contruction (cấu tạo)
Unlike a conventional synchronous motor, both the rotor and stator of a SR motor have salient
poles as shown in Fig. 39.22. This doubly-salient arrangement is very effective for
electromagnetic energy conversion.
Khc với động cơ đồng bộ thông thường, cả rotor v stator của động cơ SR đều c cực lồi như
hnh 39.22. cấu tạo lồi kp như thế ny rất hiệu quả trong việc chuyển đổi năng lượng điện từ.
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!,3"'*" ,( #9 " $$n $*/+/01"@%;=n
$% 83%0.&"!3+%?.0ZLQ)A[$
$$!$0\
$$$!,%%2.$*/!"!!!"H.&"!*.#8!n?/F94/H;=F9R - /!5. <!
!`h7
(VK&&%$# 8!W9(R9
]3!.)#!%!)0$8%%$$$/ #0'$ (.##/.%%0 &&%$*! ,$*" )!/
&&%$# 8!.# 
G (aF99/.j5pZB 6/09%"S"01,4(R9 /=/F9 !9/#$W9(R9
/0n


" %&."&!$*."$ %(5`n/F9(R9 !9"#$?/@F99/.47
" #8!?E!7
!8# &&%$ #%$9/!!*&"!#!"'3 # #% " *, $)#+'
/3 ]h9(R9/0/3]3 /4/q+,*/\ ]R5=9G +557
^N# *(.$H$&
!95^4/Z95=,,* /0K9<7
VR Stepper Motor SR Motor
1. It rotates in steps. quay từng bước
2. It is designed rst and foremost for open-loop opera"on. là
thiết kế đầu "ên và hang đầu về điều khiển vòng hơ
3. Its rotor poles are made of ferromagne"c material. Các cực
của rotor được làm bằng vật liệu sắt từ
4. It is capable of half-step opera"on and microstepping. Nó có
khả năng hoạt động nửa bước và vi bước.

5. Has low power ra"ng. Có công suất thấp.

6. Has lower eGciency. Có hiệu suất thấp .
$ /!"#!8.!"! 8!+H. 0%$>_#
%!*2%!!&#!"!%$8 %/!"$!&8 %,!"9$)+$C.9$D3E)
9F%A$C.#`$ZAD!@AB)[$L.P

"!!"&!% " %! *!//""! )8# "$ %+##a##b "!!"
#c)ALM#%(d)3e%$O.fg
$!*$)*/!"$&."&!.9U)ALM#$Z9Z3h$_#AF#
0

 &!,"" 8).&!ij9=IXX&+##U).V%>AZij9=
IXX&
 $)"!3" %%N#$#0+k)$O..P# !+
39.20. Comparison between VR stepper Motor and SR Motor: so snh giữa động cơ bước VR v
động cơ SR
39.21. The Resolver
 0, 0'$$$$% "! 0#"!(.*$<"/"!$$/!%%!,$)"&#
$ ]%#"$# %*$&% #(, !",$*$)$6Xl *!I7Xl
$$  ,! !",$*$) *,!"!!",$*$)-$)+56+7;
$$$$&.# ($"! !"!"!"!!"
$30 ".. %%0!.* /!%%!,"(# .$"!.&.3!% )$&.!/."".+
M7O&l,*"!9%
!9/#$ 0Y9/14+,*"!9% 0K9 /0,*"."D9]'/09%
?/,/$[' -"@$n
VO$'()*  !"01"G ;./Nor?/F9;=&Oor
VX%O$'()*[  !5=! !s9%O$'()* 0K9 
V% /@B49$D5=!  !/!^! !
/0Y9 /:/\9?/F9"01Q(R9".,4"c$/$"@B4".,4/!"c$

5=!$'?+5:"c$/\9Z"01Q(R9234 R
 !".#8!
 $#!".#8! %/ ." *0(!%/!" "!%3" "!,$-$)+56+7;+" ",!
 !",$*$),$# ",!.*6Xl & "+! &&%$# 8!'!%0! !",$*$)$.*'
!"($)!"2#$"#.$*+,!"!!",$*$)#!#8! "("!.)!."!.)%$&"$) *
(".+

Cấu tạo
XB$ <!/W^9</".5=?e/.$]' /3 ]h"!9%"01/@ /h /:/MN7O>
O$'()*  !t /$Nor
!9/c$/3 ,W9(R9/u%' $'()*  !"01Q(R9+Z,$'()*?/,"01-
9t</+/"c$$'()*! !"01"09!=5=?3 -565=/ 01 5=/A /7
(K&&%$# 8!
!%3"m* 0 &&%$# 8!$ 3$) 8! *$)*"$ 8! !,$-$)+56+7j  *#,"-$)+56+7j(
&"!3$*90+
ứng dụng
'"!9%"01v /B* !9/#$W9(R9"@"#$/0695=I,"h/"'!/0 !9/:/MN7OwU </:/MN7Ow] 
/B*%x=9/K7
$ 3$) 8!K&&%$# 8!
As shown in Fig. 39.25 (a), the purpose is to determine the distance D to the des"na"on. Suppose the range R to a base sta"on
as found by a radar ranging device is 369 km. The angle θ is also determined directly. If the amplifier scale is 4.5 V per 100 km,
the range would be represented by 369 × (4.5 / 100) = 16.6 V. Further suppose that angle θ is found to be 52.5º. Now, set the
resolver at 52.5º and apply 16.6 V to rotor terminals R
3
R
4
. The voltage which appears at terminals S
1
S
2

represents D. If we
assume K = stator turns / rotor turns = 1, the voltage available at S
1
S
2
will be = 16.6 / cos 52.5º = 16.6 / 0.6088 = 27.3 V. Since
4.5 V represents 100 km, 27.3 V represents 27.3 × 100 / 4.5 =607 km.
i)ứng dụng chuyển hướng
/:/MN7OwR"e/;="@I,"h/ d?/!H9,/k"3"e/+
HQ !94/<5 <9-v /B*'  /3 ]f9(56?/!H9,/"!"01;=MPN?7%ϴ "01I,
"h/ 2347
3$4/<5]'?/$3/"<;=>7wW956&oo?+ /:?/!H9,/=*L"01_$*"A;=nMPNIT>7wU&ooVy&P7P
7
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".,4I$B /.["c$j}j~ 0K9W9/!k73$/\9 9HQby5Z9  !U! !5Z9y&+".,4 <j}
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