WO2003091737A1 - Verfahren und einrichtung zur bestimmung der drehzahl und/oder drehrichtung und/oder der position der welle eines elektromotors - Google Patents
Verfahren und einrichtung zur bestimmung der drehzahl und/oder drehrichtung und/oder der position der welle eines elektromotors Download PDFInfo
- Publication number
- WO2003091737A1 WO2003091737A1 PCT/EP2003/004168 EP0304168W WO03091737A1 WO 2003091737 A1 WO2003091737 A1 WO 2003091737A1 EP 0304168 W EP0304168 W EP 0304168W WO 03091737 A1 WO03091737 A1 WO 03091737A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnetic field
- sensor
- field generator
- shaft
- electric motor
- Prior art date
Links
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
-
- 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
-
- 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
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/66—Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine, e.g. with impedances or switches
Definitions
- the invention relates to a method and a device for determining the speed and / or direction of rotation and / or the position of the shaft of an electric motor.
- Such methods and devices are known in a variety of ways from the prior art. For example, it is known to arrange a signal transmitter on the shaft, which emits a signal to a signal sensor arranged on the housing side with each revolution of the shaft. The number or frequency of the signals received can be used to draw conclusions about the speed or direction of rotation or the position of the shaft.
- the present invention is therefore based on the object of proposing a method and a device for determining the speed and / or direction of rotation and / or the position of the shaft of an electric motor which does not provide any components on the shaft of the electric motor.
- This object is achieved with a method according to the invention in that at least one magnetic field generator is flowed through by the current supplying the electric motor, that the magnetic field generated by the magnetic field generator is detected by a sensor, and that by means of a signal evaluation from the detected change in the magnetic flux density of the magnetic field the speed and / or direction of rotation and / or the change in position or the speed and / or direction of rotation and / or the position of the shaft is determined.
- the magnetic field generator is advantageously a coil.
- a coil can also be arranged far from the shaft, for example on a printed circuit board or a brush support plate.
- a particularly preferred embodiment of the invention provides that the magnetic field generator is a suppression choke.
- a suppression choke is provided in electric motors, for example on a brush support plate, and is used for radio interference suppression.
- the provision of the interference choke as a magnetic field generator has the advantage that no additional components have to be provided. Since electric motors generally have suppression chokes anyway, such a suppression choke is advantageously used as a magnetic field generator.
- the magnetic field generator can also be formed by the armature winding of the electric motor. Since the electric motor has an armature winding anyway, no additional components are required to implement the magnetic field generator in this embodiment.
- the senor detects the magnetic flux density in an analog and linear manner. Such detection can be done with inexpensive, known components.
- the signal detected by the sensor is advantageously filtered with a low-pass filter and / or converted into a square-wave signal with a Schmitt trigger in particular. Due to such filtering or conversion, data can be evaluated in an advantageous manner.
- the filtered or converted signals are amplified. This also contributes to a more favorable signal evaluation.
- the stated object is also achieved by a device for determining the speed and / or direction of rotation and / or the position of the shaft of an electric motor, which is suitable for carrying out the method according to the invention.
- Such a device comprises a magnetic field generator, in particular in the form of a coil, a suppression choke or an armature winding, a sensor assigned to the magnetic field generator and a control unit for signal evaluation that is electrically coupled to the sensor.
- a magnetic field generator in particular in the form of a coil, a suppression choke or an armature winding
- a sensor assigned to the magnetic field generator and a control unit for signal evaluation that is electrically coupled to the sensor.
- a control unit for signal evaluation that is electrically coupled to the sensor.
- Such a device has the advantage that to determine the speed and / or direction of rotation and / or the position of the shaft of the electric motor, no components are to be provided on the shaft or to detect the shaft.
- the magnetic field generator is a suppression choke which is present anyway and is detected by the sensor.
- a plurality of sensors can also be provided, possibly also on a number of interference suppression chokes.
- the interference suppressor has a metallic core, in particular a ferrite core, in the axial extension of which the sensor is arranged. With such an arrangement, the magnetic flux density of the magnetic field of the suppression choke can be detected favorably.
- the senor is a magnetic field sensor, a Hall sensor or a magnetoresistive sensor.
- corresponding sensors possibly also several sensors, can be used.
- a device 10 according to the invention is shown schematically in the figure.
- the device 10 comprises an electric motor M, which is supplied with current via two electrical lines 12 and 14.
- a magnetic field generator 16 in the form of a Suppressor choke shown.
- the suppressor chokes 16 each have a ferrite core 18.
- a sensor 20, in particular a Hall sensor, is arranged in the axial extension of the ferrite cores 18.
- the sensors 20 are each mounted on a printed circuit board 22.
- the printed circuit boards 22 are connected to a control device 26 via electrical lines 24.
- the passage of the current change by the magnetic field generator 16 This changes the magnetic flux density of the magnetic field, not shown.
- This change in the flux density of the magnetic field is detected by the sensors 20, which are arranged at a close distance from the ferrite cores 18.
- the acquisition is analog and linear.
- the analog signal is fed to the control unit for signal evaluation via lines 24.
- the offset value of the signal at different currents can be compensated for by differentiating the flux density.
- the signal is then filtered using a low-pass filter, for example 4th order Butterworth 2000 Hz, and converted into a square-wave signal using a Schmitt trigger.
- This signal can be amplified and used for speed or Position determination can be used.
- the relationship between the signal obtained and the speed or direction of rotation or the position of the shaft can be determined, for example, experimentally or on the basis of known physical conditions.
- the device 10 described has the advantage that the detection of the rotational speed and the position of the motor shaft can take place without the provision of components on or in the region of the motor shaft. This simplifies the construction and assembly process of the engine; the motor can also be made more compact.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003233040A AU2003233040A1 (en) | 2002-04-26 | 2003-04-22 | Method and device for determining the rotational speed and/or rotational direction and/or the position of a shaft in an electric motor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10218881.5 | 2002-04-26 | ||
DE10218881A DE10218881A1 (de) | 2002-04-26 | 2002-04-26 | Verfahren und Einrichtung zur Bestimmung der Drehzahl und/oder Drehrichtung und/oder Position der Welle eines Elektromotors |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003091737A1 true WO2003091737A1 (de) | 2003-11-06 |
Family
ID=28798847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/004168 WO2003091737A1 (de) | 2002-04-26 | 2003-04-22 | Verfahren und einrichtung zur bestimmung der drehzahl und/oder drehrichtung und/oder der position der welle eines elektromotors |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2003233040A1 (de) |
DE (1) | DE10218881A1 (de) |
WO (1) | WO2003091737A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106248987A (zh) * | 2016-08-15 | 2016-12-21 | 璧垫旦 | 一种永磁式直流伺服测角振动机组 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016105797A1 (de) * | 2016-03-30 | 2017-10-05 | Hochschule Ravensburg-Weingarten | Verfahren zur Bestimmung des Drehwinkels bei einem Elektromotor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3967200A (en) * | 1973-10-26 | 1976-06-29 | Matsushita Electric Industrial Co., Ltd. | Speed detector for use with miniature DC motor |
JPH02119593A (ja) * | 1988-10-27 | 1990-05-07 | Sumitomo Heavy Ind Ltd | フィードバック制御システム |
US5349276A (en) * | 1992-02-28 | 1994-09-20 | The Walt Disney Company | Control system for regulating motor speed |
DE10047508C1 (de) * | 2000-09-26 | 2002-03-07 | Ebm Werke Gmbh & Co Kg | Verfahren zum Ermitteln der Drehzahl eines Wechselstrom-Motors sowie Motor-Steuersystem |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3210082A1 (de) * | 1981-04-02 | 1982-10-21 | IWE Ingenieurgesellschaft für wirtschaftliche Energienutzung mbH, 6078 Neu-Isenburg | Verfahren und schaltungsanordnung zur regelung der drehzahl eines pumpenmotors |
DE4311182A1 (de) * | 1993-04-06 | 1994-10-13 | Bosch Gmbh Robert | Verfahren zur berührungslosen Drehzahlmessung |
GB2300711A (en) * | 1995-04-20 | 1996-11-13 | Otter Controls Ltd | Rotation sensing in DC electric motors |
-
2002
- 2002-04-26 DE DE10218881A patent/DE10218881A1/de not_active Ceased
-
2003
- 2003-04-22 WO PCT/EP2003/004168 patent/WO2003091737A1/de not_active Application Discontinuation
- 2003-04-22 AU AU2003233040A patent/AU2003233040A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3967200A (en) * | 1973-10-26 | 1976-06-29 | Matsushita Electric Industrial Co., Ltd. | Speed detector for use with miniature DC motor |
JPH02119593A (ja) * | 1988-10-27 | 1990-05-07 | Sumitomo Heavy Ind Ltd | フィードバック制御システム |
US5349276A (en) * | 1992-02-28 | 1994-09-20 | The Walt Disney Company | Control system for regulating motor speed |
DE10047508C1 (de) * | 2000-09-26 | 2002-03-07 | Ebm Werke Gmbh & Co Kg | Verfahren zum Ermitteln der Drehzahl eines Wechselstrom-Motors sowie Motor-Steuersystem |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 014, no. 346 (E - 0956) 26 July 1990 (1990-07-26) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106248987A (zh) * | 2016-08-15 | 2016-12-21 | 璧垫旦 | 一种永磁式直流伺服测角振动机组 |
Also Published As
Publication number | Publication date |
---|---|
AU2003233040A1 (en) | 2003-11-10 |
DE10218881A1 (de) | 2003-11-06 |
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