WO2003063334A1 - Commande de moteur a courant continu faisant appel a un courant alternatif redresse en onde entiere pour l'entrainement du moteur - Google Patents

Commande de moteur a courant continu faisant appel a un courant alternatif redresse en onde entiere pour l'entrainement du moteur Download PDF

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Publication number
WO2003063334A1
WO2003063334A1 PCT/US2002/001417 US0201417W WO03063334A1 WO 2003063334 A1 WO2003063334 A1 WO 2003063334A1 US 0201417 W US0201417 W US 0201417W WO 03063334 A1 WO03063334 A1 WO 03063334A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
zero
motor
output
rectified
Prior art date
Application number
PCT/US2002/001417
Other languages
English (en)
Inventor
Michael D. Cummins
Original Assignee
Cummins Michael D
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cummins Michael D filed Critical Cummins Michael D
Priority to PCT/US2002/001417 priority Critical patent/WO2003063334A1/fr
Publication of WO2003063334A1 publication Critical patent/WO2003063334A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/292—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC
    • H02P7/293—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC using phase control

Definitions

  • the present invention relates to a DC motor controller utilizing full-wave rectified alternating current (AC) for the motor drive power, and more particularly, to DC motor controller that will control the speed and other related parameters such as torque of a direct current (DC) motor.
  • AC alternating current
  • DC direct current
  • Speed can also be controlled from the AC line using thyristors to turn the AC signal on and off.
  • This method is well known but has some problems with smooth start torque (from zero, or rotor stop) due to the thyristor requirements of turning on (conduction start) at some relative high voltage in the AC cycle and turning off (conduction stop) at AC zero voltage.
  • Turn on time is typically 5 microseconds and turn off time is about 25 microseconds.
  • a rather complicated snubber circuit is required. This is variously referred to as time interval modulation, phase control, pulse width control, etc., depending on the scheme of controlling conduction time and/or applied voltage.
  • Speed control is typically in the 50:1 range.
  • the DC motor accepts a unipolar current/voltage of constant DC voltage or a rectified AC signal, i.e. as long as the signal is unipolar and the current into the motor only conducts in one direction, the motor operates effectively.
  • the speed increases (the motor rotates faster). If the voltage reverses, both the current and the direction of rotation reverses.
  • a DC motor is near a "constant current" device.
  • voltage (or ON time) is increased, rotational speed increases directly as the voltage (or ON time) but the motor current remains nearly constant (if load is constant, which is the typical motor application) over the voltage (or ON time) control range. This is due to the reverse EMF of the rotor coil and inertia of the rotor/load characteristics.
  • Figure 1 represents an electronic diagram of the motor controller object of the present invention.
  • Figure 2 includes the following wave form representations:
  • A shows a representation of the AC voltage input.
  • B and C illustrates a representation of the full wave rectified AC input.
  • D is a representation of the ON/OFF current conduction of the opto-coupled device.
  • E is a schematic representation of the output pulse from the opto- coupled device and referenced with letter E in figure 1.
  • F represents a timing chart of the fixed time, positive going output pulse from the first monostable multivibrator to set the zero reference time and referenced with letter F in figure 1.
  • G illustrates the timing chart for the adjustable time, positive going output pulse from the second monostable multivibrator to control switching FET on time and current to the motor M, and referenced with letter G in figure 1.
  • the present invention basically includes a source of AC voltage 20, as shown in waveform A, two full wave rectifier assemblies 30 and 40 to provide two separate sources of rectified direct voltage.
  • the output 31 of assembly 30 provides a full wave rectified output to motor M and to input 51 of a stable D.C. source 50 providing a voltage Vdd.
  • Output 41 of assembly 40 provides a full wave rectified voltage which is presented to the input of opto-coupler device 60, as represented by waveform B, C, and D in figure 2.
  • Opto-coupler device 60 can be implemented with a H11L1 manufactured by Motorola, Inc., or equivalent device.
  • the resulting output to the first monostable has the characteristics of waveform E, as shown in figure 2.
  • Waveform E is connected to input 71 of monostable multivibrator IC 70 and its output 72 is shown as waveform F in figure 2, which is in turn connected to monostable multivibrator IC 80's input 81.
  • IC's 70 and 80 are implemented, in the preferred embodiment, with Motorola's MCI4538B.
  • Output 82 provides a sign as represented in waveform G in figure 2 and is connected to the gate of switching device 90.
  • Switching device 90 is implemented with a field effect transistor (FET) to switch on and off the modulated power applied to motor M.
  • FET field effect transistor
  • the speed of motor M is determined by the on-time of one half of a full wave rectified AC voltage.
  • a smooth start torque can be accomplished from zero (rotor stop) and continue to the maximum rotor speed when the sloped voltage G x shown as G in figure 2, reaches one half of the period of the AC.
  • the RC constant of RC circuit 110 the width of waveform G in figure 2, is varied and thus the time ON-OFF of switching device 90.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

La présente invention concerne une commande de moteur (10) qui fait appel à une tension de courant alternatif redressée (20) pour entraîner un moteur à courant continu (M). Une première tension redressée produit une forme d'onde (A) qui passe par une tension zéro en synchronisation avec la tension d'alimentation en courant alternatif (20). La première tension redressée est appliquée au moteur à courant continu (M). Une seconde tension redressée produit une forme d'onde (A) qui passe par une tension zéro en synchronisation avec la tension d'alimentation en courant alternatif (20). Un circuit produisant une tension de sortie à forme d'onde unipolaire (B, C et D) entraîne un commutateur (90) qui met sous tension et hors tension la connexion de la première tension redressée avec le moteur à courant continu (M). La période sous tension peut varier de zéro à la moitié de la période de la tension alternative (20) pour la vitesse maximum. La commutation (90) est synchronisée avec la forme d'onde unipolaire. On fait varier la période sous tension en modifiant la largeur de l'impulsion qui commande le dispositif de commutation (90).
PCT/US2002/001417 2002-01-22 2002-01-22 Commande de moteur a courant continu faisant appel a un courant alternatif redresse en onde entiere pour l'entrainement du moteur WO2003063334A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2002/001417 WO2003063334A1 (fr) 2002-01-22 2002-01-22 Commande de moteur a courant continu faisant appel a un courant alternatif redresse en onde entiere pour l'entrainement du moteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2002/001417 WO2003063334A1 (fr) 2002-01-22 2002-01-22 Commande de moteur a courant continu faisant appel a un courant alternatif redresse en onde entiere pour l'entrainement du moteur

Publications (1)

Publication Number Publication Date
WO2003063334A1 true WO2003063334A1 (fr) 2003-07-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/001417 WO2003063334A1 (fr) 2002-01-22 2002-01-22 Commande de moteur a courant continu faisant appel a un courant alternatif redresse en onde entiere pour l'entrainement du moteur

Country Status (1)

Country Link
WO (1) WO2003063334A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4417187A (en) * 1980-12-24 1983-11-22 Pfaff Haushaltmaschinen Gmbh Circuit for controlling the speed of a motor
US5003455A (en) * 1990-08-14 1991-03-26 Polyspede Electronics Corporation Circuitry and method for controlling the firing of a thyristor
US5780986A (en) * 1995-03-02 1998-07-14 Hewlett-Packard Company Soft switching, PWM controller and method for reducing torque ripple in multiphase DC motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4417187A (en) * 1980-12-24 1983-11-22 Pfaff Haushaltmaschinen Gmbh Circuit for controlling the speed of a motor
US5003455A (en) * 1990-08-14 1991-03-26 Polyspede Electronics Corporation Circuitry and method for controlling the firing of a thyristor
US5780986A (en) * 1995-03-02 1998-07-14 Hewlett-Packard Company Soft switching, PWM controller and method for reducing torque ripple in multiphase DC motor

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