WO1998023967A1 - Procede de detection continue d'une vitesse de rotation de moteurs electriques et systeme pour mettre ledit procede en oeuvre - Google Patents

Procede de detection continue d'une vitesse de rotation de moteurs electriques et systeme pour mettre ledit procede en oeuvre Download PDF

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Publication number
WO1998023967A1
WO1998023967A1 PCT/EP1997/005404 EP9705404W WO9823967A1 WO 1998023967 A1 WO1998023967 A1 WO 1998023967A1 EP 9705404 W EP9705404 W EP 9705404W WO 9823967 A1 WO9823967 A1 WO 9823967A1
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WO
WIPO (PCT)
Prior art keywords
speed
motor
corrected
determined
output signals
Prior art date
Application number
PCT/EP1997/005404
Other languages
German (de)
English (en)
Inventor
Michael Henninger
Original Assignee
Mannesmann Vdo Ag
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 Mannesmann Vdo Ag filed Critical Mannesmann Vdo Ag
Publication of WO1998023967A1 publication Critical patent/WO1998023967A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/08—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for fluid
    • 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
    • H02P7/0094—Arrangements for regulating or controlling the speed or torque of electric DC motors wherein the position is detected using the ripple of the current caused by the commutator
    • 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
    • H02P7/2805—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 whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

Definitions

  • the invention relates to a method for the continuous detection of a rotational speed of electric motors, in which the rotational speed is fed to an auxiliary unit of a motor vehicle, in particular an auxiliary power system, for control purposes, and an arrangement for carrying out the method.
  • the speed of the electric motor is determined with the aid of external sensors, usually Hall sensors, which are arranged in the electric motor, and give a speed-dependent output signal to a control device.
  • the control device recognizes the speed changes that deviate from a target speed of the electric motor and regulates them.
  • the invention is therefore based on the object of specifying a method for reliably detecting the engine speed, which can be implemented without great assembly and auxiliary effort.
  • the object is achieved in that the rotational speed of a DC motor with commutators is determined with the aid of an electronic device which emits output signals as a function of the commutation occurring in the current profile of the DC motor.
  • the advantage of the invention is that no external speed sensors are used and thus the associated manufacturing, construction and adjustment effort is eliminated.
  • This method for speed detection can be used in a variety of ways in all motor vehicle applications where a speed must be detected. So z. B. in auxiliary systems, window regulators, seat adjustment u. So only a compact electronics must be installed on site.
  • the speed can be determined in a simple manner in that a frequency is determined from the time interval between successive output signals.
  • the number of output signals per unit of time can be counted directly.
  • the speed measured in this way is compared in a control loop with a predetermined target speed of the DC motor and existing speed deviations are corrected.
  • the regulation also enables the motor to react quickly to changes in operating parameters such as load, temperature and supply voltage, since the kinetic energy available in the motor is used.
  • the method according to the invention works independently of fluctuations in the supply voltage and the temperature.
  • the speed is detected and the DC motor is advantageously controlled via a pulse width modulated voltage signal.
  • the setpoint value of the speed is adapted to the respective vehicle speed.
  • FIG. 1 arrangement for controlling an electrohydraulic pressure supply
  • FIG 3 Flow chart of a program provided for the microcomputer in the arrangement according to Figure 1.
  • an electrohydraulic pump supply is shown schematically, in which a steering force support is realized via the oil pressure in a circulation system 5.
  • the steering work is supported by pressure oil, which is transported in a closed circuit.
  • the electro-hydraulic pump supply shown in Fig. 1 shows a pump 1 for regulating the oil pressure, which is driven by a brushed DC motor 2.
  • the DC motor 2 is connected to an electronic device 4, which in turn leads to a control device 3.
  • the electronic device 4 recognizes according to a method known per se, such as. B. is known in DE 42 17 265 A1, based on the motor current profile, the commutation of the DC motor and emits a corresponding output signal.
  • This commutation signal is proportional to the speed of the DC motor and is evaluated by the control device 3, which is preferably a microprocessor, and the speed of the DC motor is determined therefrom.
  • the speed can be determined by a frequency measuring method known per se, in which the period between the negative or positive edges of the output signal representing commutation is determined.
  • this time interval it is calculated how often this signal per considered time unit, e.g. B. a minute occurs. Another possibility provides that the edge representing the commutation is counted in a time period x.
  • the control device 3 compares the speed signals thus obtained with a target speed, which is stored in its memory. Speed fluctuations of the DC motor that occur are determined in this way and the DC motor is driven in a clocked manner as a function of these fluctuations by the control device 3.
  • the microprocessor 3 controls the direct current motor 2 in such a way that the same speed n soNSB is reached with every change in the torque M.
  • the microprocessor 3 controls the direct current motor 2 via a pulse-width modulated voltage signal which, independently of the load torque of the motor, provides the pulse period duration ratio required to maintain the speed n so n SB .
  • the microprocessor 3 additionally evaluates the driving speed v of the motor vehicle to implement speed-dependent steering assistance. With increasing vehicle speed, the target speed n can be adjusted accordingly.
  • the method is based on the consideration that the speed n of the DC motor 2 drops with an increased load (increasing torque M).
  • the engine 2 is in stand-by mode.
  • a speed control is active, which regulates the current speed n to a stand-by setpoint speed n soNSB, which is done by tracking the pulse period duration ratio of the motor control signal.
  • step 3 The speed fluctuations ⁇ n occurring during this time are evaluated in step 3 to determine whether the amount of the fluctuations ⁇ n is greater than a first threshold value x over a period of time ⁇ ⁇ , as a result of which a drop in the speed n is concluded. If this is the case, the speed control is deactivated at 5 and a PWM signal of 100% is issued. The engine works in load mode.
  • step 3 If it is determined in step 3 that the amount .DELTA.n / .DELTA.t is smaller than the first threshold value x, a query is made in step 4 as to whether the pulse period duration ratio of the PWM signal is greater than a predetermined threshold value y. If this is the case, the electric motor 2 is also switched to load operation (step 5). If this is not the case, the engine remains in stand-by mode in step 2.
  • the microcomputer checks whether the current speed n during a fixed period ⁇ t 2 is greater than a speed threshold n s (step 6). It is assumed that the fixed period ⁇ t 2 exceeds a minimum period t.
  • step 2 the electric motor 2 is switched back to the stand-by state described above.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

L'invention concerne un procédé de détection continue d'une vitesse de rotation de moteurs électriques, selon lequel la vitesse de rotation est acheminée, à des fins de réglage, jusqu'à une unité secondaire d'un véhicule automobile, notamment un système asservi. Afin de pouvoir effectuer une détection fiable de la vitesse de rotation du moteur, sans impliquer une complexité technique importante en termes de montage et de matériel auxiliaire, la vitesse de rotation d'un moteur à courant continu muni d'un collecteur est déterminée à l'aide d'un dispositif électronique qui émet des signaux de sortie en fonction de la commutation intervenant dans le trajet du courant du moteur à courant continu.
PCT/EP1997/005404 1996-11-22 1997-10-01 Procede de detection continue d'une vitesse de rotation de moteurs electriques et systeme pour mettre ledit procede en oeuvre WO1998023967A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19648402.2 1996-11-22
DE19648402A DE19648402C2 (de) 1996-11-22 1996-11-22 Verfahren zur kontinuierlichen Erfassung einer Drehzahl von Elektromotoren sowie eine Anordnung zur Durchführung des Verfahrens

Publications (1)

Publication Number Publication Date
WO1998023967A1 true WO1998023967A1 (fr) 1998-06-04

Family

ID=7812472

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/005404 WO1998023967A1 (fr) 1996-11-22 1997-10-01 Procede de detection continue d'une vitesse de rotation de moteurs electriques et systeme pour mettre ledit procede en oeuvre

Country Status (2)

Country Link
DE (1) DE19648402C2 (fr)
WO (1) WO1998023967A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19928135A1 (de) * 1999-03-13 2000-09-14 Continental Teves Ag & Co Ohg Schaltungsanordnung zur Ansteuerung eines Elektromotors
DE10050239A1 (de) * 2000-10-11 2002-05-02 Bosch Gmbh Robert Verfahren zur Bestimmung der Ist-Drehzahl bei sensorlosen Gleichstrommotoren
GB0130150D0 (en) 2001-12-18 2002-02-06 Johnson Electric Sa Method of measuring motor speed
DE10242334B4 (de) * 2002-09-12 2011-12-22 Robert Bosch Gmbh Verfahren und Einrichtung zur Drehzahlmessung eines getaktet angesteuerten elektrischen Motors
DE102005023880A1 (de) * 2005-05-24 2006-11-30 Wacker Construction Equipment Ag Drehzahlmessung und -regelung für einen Universalmotor
DE102005045283B4 (de) 2005-09-22 2014-05-15 Pfeiffer Vacuum Gmbh Vakuumpumpsystem
DE102012203155A1 (de) * 2012-02-29 2013-08-29 Franz Xaver Meiller Fahrzeug- Und Maschinenfabrik - Gmbh & Co Kg Nutzfahrzeugaufbau und ein damit ausgerüstetes Nutzfahrzeug

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507782A1 (fr) * 1981-06-16 1982-12-17 Valeo Tachymetre pour un dispositif electrique a commutation, en particulier pour un moteur electrique
EP0090152A1 (fr) * 1982-03-19 1983-10-05 SGS Halbleiter-Bauelemente GmbH Procédé pour obtenir une grandeur proportionnelle à la vitesse pour un moteur à courant contenu
DE3234683A1 (de) * 1982-09-18 1984-03-22 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur messung der drehzahl eines gleichstrommotors
DE4100584A1 (de) * 1991-01-11 1991-06-06 Klaus Fischer Sensor fuer die drehzahlregelung von kleinmotoren mit kollektor
DE4420309A1 (de) * 1994-06-10 1995-12-14 Vdo Schindling Verfahren und Anordnung zur Ansteuerung einer elektrohydraulischen Druckversorgung für eine Hilfskrafteinrichtung eines Kraftfahrzeuges

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1673364A1 (de) * 1967-12-14 1971-08-19 Bosch Gmbh Robert Anordnung zur Messung der Drehzahl eines Gleichstrommotors
DE4217265C2 (de) * 1992-05-25 1998-04-09 El Mos Elektronik In Mos Techn Verfahren zur Ermittlung von relevanten relativen Extremwerten eines störimpulsbeaufschlagten Signals

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507782A1 (fr) * 1981-06-16 1982-12-17 Valeo Tachymetre pour un dispositif electrique a commutation, en particulier pour un moteur electrique
EP0090152A1 (fr) * 1982-03-19 1983-10-05 SGS Halbleiter-Bauelemente GmbH Procédé pour obtenir une grandeur proportionnelle à la vitesse pour un moteur à courant contenu
DE3234683A1 (de) * 1982-09-18 1984-03-22 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur messung der drehzahl eines gleichstrommotors
DE4100584A1 (de) * 1991-01-11 1991-06-06 Klaus Fischer Sensor fuer die drehzahlregelung von kleinmotoren mit kollektor
DE4420309A1 (de) * 1994-06-10 1995-12-14 Vdo Schindling Verfahren und Anordnung zur Ansteuerung einer elektrohydraulischen Druckversorgung für eine Hilfskrafteinrichtung eines Kraftfahrzeuges

Also Published As

Publication number Publication date
DE19648402C2 (de) 2000-04-20
DE19648402A1 (de) 1998-05-28

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