US4629952A
Expired / Lapsed
US
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Driving control method and circuit for electromagnetic servo devices
Assignee: Honda Motor Co Ltd
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Filing: 1985-08-12
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Granted: 1986-12-16
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Expires: 2005-08-12
Abstract
Abstract A driving control method for an electromagnetic servo device including a driving control circuit adapted to generate a torque magnitude signal and a torque direction signal on the basis of an output signal from a torque detection mechanism for detecting torque acting on an input shaft in relation to an output shaft and to send an armature current of such a magnitude and of such a polarity as desirous in accordance with the torque magnitude and direction signals to an electric motor for additionally providing auxiliary torque for the output shaft, comprises a step of setting the width of a dead zone of the torque magnitude signal wider than that of a dead zone of the torque direction signal. An electromagnetic servo device including a driving control circuit adapted to generate a torque magnitude signal and a torque direction signal on the basis of an output signal from a torque detection mechanism for detecting torque acting on an input shaft in relation to an output shaft and to send a driving current, of such a magnitude and of such a polarity as desirous in accordance with the torque magnitude and direction signals, to an electric motor for additionally providing auxiliary torque for the output shaft, is improved in that the driving control circuit comprises a dead zone control mechanism for setting the width of a dead zone of the torque magnitude signal wider than that of a dead zone of the torque direction signal.
Inventors
- 👤 Yasuo Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:30
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/04; B62D5/0457; B62D5/046; B62D5/0463; H; H02; H02K; H02K23/00; H02K23/02; H02K23/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
170 words
A driving control method for an electromagnetic servo device (200) including: an input shaft (1); an output shaft (4); an electric motor (20) for providing said output shaft (4) with auxiliary torque; torque detection means (13) for detecting input torque acting on said input shaft (1); and a driving control circuit (100; 300) for generating a torque magnitude signal (Sa) and a torque direction signal (Sdr, Sdl; Sdr', Sdl') on the basis of an output signal (VR, VL; VR 2 , VL 2 ) from said torque detection means (13) to send to said electric motor (20) a driving current (An) of such a magnitude and of such a polarity as desirous in accordance with both said torque magnitude signal (Sa) and said torque direction signal (Sdr, Sdl; Sdr', Sdl'), comprising: a step of having the width of a dead zone (DZ 1 ) of said torque magnitude signal (Sa) set wider than that of a dead zone (DZ 2 ) of said torque direction signal (Sdr, Sdl; Sdr', Sdl').
Claim 2
Dependent Claim
170 words
A driving control method for an electromagnetic servo device (200) including: an input shaft (1); an output shaft (4); an electric motor (20) for providing said output shaft (4) with auxiliary torque; torque detection means (13) for detecting input torque acting on said input shaft (1); and a driving control circuit (100; 300) for generating a torque magnitude signal (Sa) and a torque direction signal (Sdr, Sdl; Sdr', Sdl') on the basis of an output signal (VR, VL; VR 2 , VL 2 ) from said torque detection means (13) to send to said electric motor (20) a driving current (An) of such a magnitude and of such a polarity as desirous in accordance with both said torque magnitude signal (Sa) and said torque direction signal (Sdr, Sdl; Sdr', Sdl'), comprising: a step of having the width of a dead zone (DZ 1 ) of said torque magnitude signal (Sa) set wider than that of a dead zone (DZ 2 ) of said torque direction signal (Sdr, Sdl; Sdr', Sdl').
Claim 3
Dependent Claim
40 words
A driving control method according to claim 1, wherein: said width setting step comprises a step of adding a bias signal (Vb 2 ) to said output signal (VR 2 , VL 2 ) of said torque detection means (13).
Claim 4
Dependent Claim
52 words
A driving control method according to claim 2, wherein: said width setting step further comprises, before adding said bias signal (Vb 2 ) to said output signal (VR 2 , VL 2 ) of said torque detection means (13), a step of adjusting the value of said bias signal (Vb 2 ).
Claim 5
Dependent Claim
57 words
A driving control method according to claim 2, wherein: said width setting step further comprises, before adding said bias signal (Vb 2 ) to said output signal (VR 2 , VL 2 ) of said torque detection means (13), a step of zero adjusting a torque detection signal (VR, VL) output from said torque detection means (13).
Claim 6
Dependent Claim
42 words
A driving control method according to claim 1, further comprising: a step of generating said torque direction signal (Sdr, Sdl) from said output signal (VR 2 , VL 2 ) of said torque detection means (13), using a voltage comparator (46, 48).
Claim 7
Dependent Claim
49 words
A driving control method according to claim 1, further comprising: a step of generating said torque direction signal (Sdr', Sdl') from said output signal (VR 2 , VL 2 ) of said torque detection means (13), using a voltage comparator (46, 48) and a status memory circuit (53, 54).
Claim 8
Dependent Claim
180 words
In an electromagnetic servo device (200) including: an input shaft (1); an output shaft (4); an electric motor (20) for providing said output shaft (4) with auxiliary torque; torque detection means (13) for detecting input torque acting on said input shaft (1); and a driving control circuit (100; 300) for generating a torque magnitude signal (Sa) and a torque direction signal (Sdr, Sdl; Sdr', Sdl') on the basis of an output signal (VR, VL; VR 2 , VL 2 ) from said torque detection means (13) to send to said electric motor (20) a driving current (An) of such a magnitude and of such a polarity as desirous in accordance with both said torque magnitude signal (Sa) and said torque direction signal (Sdr, Sdl; Sdr', Sdl'), an improvement comprising: said driving control circuit (100, 300) having dead zone control means (45, 47, 49, 50) for setting the width of a dead zone (DZ 1 ) of said torque magnitude signal (Sa) wider than that of a dead zone (DZ 2 ) of said torque direction signal (Sdr, Sdl; Sdr', Sdl').
Claim 9
Dependent Claim
180 words
In an electromagnetic servo device (200) including: an input shaft (1); an output shaft (4); an electric motor (20) for providing said output shaft (4) with auxiliary torque; torque detection means (13) for detecting input torque acting on said input shaft (1); and a driving control circuit (100; 300) for generating a torque magnitude signal (Sa) and a torque direction signal (Sdr, Sdl; Sdr', Sdl') on the basis of an output signal (VR, VL; VR 2 , VL 2 ) from said torque detection means (13) to send to said electric motor (20) a driving current (An) of such a magnitude and of such a polarity as desirous in accordance with both said torque magnitude signal (Sa) and said torque direction signal (Sdr, Sdl; Sdr', Sdl'), an improvement comprising: said driving control circuit (100, 300) having dead zone control means (45, 47, 49, 50) for setting the width of a dead zone (DZ 1 ) of said torque magnitude signal (Sa) wider than that of a dead zone (DZ 2 ) of said torque direction signal (Sdr, Sdl; Sdr', Sdl').
Claim 10
Dependent Claim
50 words
An electromagnetic servo device according to claim 7, wherein: said dead zone control means (45, 47, 49, 50) comprises bias addition means (45, 47, 49, 50) for adding a bias signal (Vb 2 ) to said output signal (VR 2 , VL 2 ) of said torque detection means (13).
Claim 11
Dependent Claim
34 words
An electromagnetic servo device according to claim 8, wherein: said bias addition means (45, 47, 49, 50) comprises bias adjust means (49, 50) for adjusting the value of said bias signal (Vb 2 ).
Claim 12
Dependent Claim
70 words
An electromagnetic servo device according to claim 8, wherein: said driving control circuit (100, 300) further comprises zero adjust means (38, 39, 40, 41, 42, 43, 44) for zero adjusting a torque detection signal (VR, VL) output from said torque detection means (13), before the stage of adding said bias signal (Vb 2 ) to said output signal (VR 2 , VL 2 ) of said torque detection means (13).
Claim 13
Dependent Claim
45 words
An electromagnetic servo device according to claim 7, wherein: said driving control circuit (100) further comprises a voltage comparator (46, 48) for generating said torque direction signal (Sdr, Sdl) from said output signal (VR 2 , VL 2 ) of said torque detection means (13).
Claim 14
Dependent Claim
56 words
An electromagnetic servo device according to claim 7, wherein; said driving control circuit (300) further comprises a voltage comparator (46, 48) and a status memory circuit (53, 54) cooperating with each other for generating said torque direction signal (Sdr', Sdl') from said output signal (VR 2 , VL 2 ) of said torque detection means (13).
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