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1. WO2000038311 - MOTOR CONTROL CIRCUIT FOR REGULATING A D.C. MOTOR

Publication Number WO/2000/038311
Publication Date 29.06.2000
International Application No. PCT/US1999/030787
International Filing Date 21.12.1999
IPC
H02P 7/29 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
7Arrangements for regulating or controlling the speed or torque of electric DC motors
06for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
18by master control with auxiliary power
24using discharge tubes or semiconductor devices
28using semiconductor devices
285controlling armature supply only
29using pulse modulation
CPC
H02P 7/2913
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
7Arrangements for regulating or controlling the speed or torque of electric DC motors
06for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
18by master control with auxiliary power
24using discharge tubes or semiconductor devices
28using semiconductor devices
285controlling armature supply only
29using pulse modulation
2913whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
Y10S 388/937
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
388Electricity: motor control systems
935Specific application:
937Hand tool
Applicants
  • STRYKER CORPORATION [US]/[US] (AllExceptUS)
  • PHILIPP, Chris [US]/[US] (UsOnly)
Inventors
  • PHILIPP, Chris
Agents
  • TUMM, Brian R.,
Priority Data
09/220,16723.12.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MOTOR CONTROL CIRCUIT FOR REGULATING A D.C. MOTOR
(FR) CIRCUIT DE COMMANDE POUR REGULER UN MOTEUR A COURANT CONTINU
Abstract
(EN)
A motor control chip (62) for asserting the control signals used to regulate the energization of the windings of a DC motor. The motor control chip includes a tachometer (94) that receives pulsed signals that vary with the rotation of the motor rotor and that produces a pulse width modulated tachometer signal as a function of the motor speed. A pulse width modulator (90) receives the tachometer signal and an analog signal representative of the user-selected motor speed. Based on the received input signals, the pulse width modulator produces a variable speed control signal. A forward/reverse oscillator (92) receives user-set signals indicating if the motor should be run in the forward or reverse directions or in an oscillatory pattern. Based on the received signals, the forward/reverse oscillator asserts a forward/reverse signal having an appropriate signal state or cycle. A motor decoder (98) receives the signals produced by the pulse width oscillator and the forward/reverse oscillator. The motor decoder then asserts the control signals that regulate when power switches selectively tie the motor windings to either a power source or ground.
(FR)
La présente invention concerne une puce de commande (62) de moteur, destinée à émettre les signaux de commande utilisés pour réguler l'excitation des enroulements d'un moteur à courant continu. La puce de commande du moteur comprend un tachymètre (94) qui reçoit des signaux d'impulsion variant avec la rotation du rotor du moteur, et qui produit un signal de largeur d'impulsion modulé en fonction de la vitesse du moteur. Un modulateur de largeur d'impulsion (90) reçoit le signal du tachymètre et un signal analogue représentant la vitesse du moteur sélectionnée par l'utilisateur. A partir des signaux d'entrée reçus, le modulateur de largeur d'impulsion produit un signal de commande de vitesse variable. Un oscillateur avant/arrière (92) reçoit les signaux établis par l'utilisateur indiquant si le moteur doit fonctionner en sens avant ou arrière ou de manière oscillatoire. A partir des signaux reçus, l'oscillateur avant/arrière émet un signal avant/arrière dont l'état ou cycle est approprié. Un décodeur de moteur (98) reçoit les signaux produits par l'oscillateur de largeur d'impulsion et l'oscillateur avant/arrière. Le décodeur du moteur émet alors les signaux de commande de réglage lorsque les commutateurs de courant relient les enroulements du moteur soit à une source de courant soit à la terre.
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