WO2022117136A1 - Verfahren zur ermittlung einer drehposition, verfahren zur ermittlung einer elektrischen winkelposition und verfahren zur ansteuerung eines elektromotors - Google Patents
Verfahren zur ermittlung einer drehposition, verfahren zur ermittlung einer elektrischen winkelposition und verfahren zur ansteuerung eines elektromotors Download PDFInfo
- Publication number
- WO2022117136A1 WO2022117136A1 PCT/DE2021/100464 DE2021100464W WO2022117136A1 WO 2022117136 A1 WO2022117136 A1 WO 2022117136A1 DE 2021100464 W DE2021100464 W DE 2021100464W WO 2022117136 A1 WO2022117136 A1 WO 2022117136A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- electric motor
- values
- rotor
- measured value
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
Links
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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
-
- 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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/12—Monitoring commutation; Providing indication of commutation failure
Definitions
- the invention relates to a method according to the preamble of claim 1.
- the invention also relates to a method for determining an electrical angle position and a method for controlling an electric motor.
- DE 102016 207643 A1 describes a method for determining a position of a rotor of an electric motor with respect to a stator of the electric motor, the rotor having permanent magnets and a magnetic encoder with a plurality of magnetic poles, the stator having three-phase windings and at least one magnetic field pickup, and the electric motor commutating step by step under electronic sensor control is, the rotor being moved relative to the stator, signals of the at least one magnetic field sensor being detected in a number of commutation steps and a position of the rotor relative to the stator being determined taking into account the signals of the at least one magnetic field sensor recorded in the number of commutation steps.
- the object of the present invention is to detect the rotational position of a rotor more precisely.
- the electric motor should be controlled more precisely.
- the electric motor should be operated more efficiently and be constructed more cost-effectively.
- At least one of these objects is solved by a method for determining a rotational position with the features of claim 1.
- the rotational position of the rotor can be detected accurately and reliably during operation of the electric motor.
- the electric motor can be made cheaper.
- the electric motor can be arranged in a vehicle.
- the vehicle may be a hybrid vehicle or an electric vehicle.
- the electric motor can be arranged in a drive train of the vehicle.
- the electric motor can provide drive torque to propel the vehicle.
- the electric motor can bring about an actuation of an actuation element, for example a transmission and/or a clutch.
- the electric motor can be a brushless DC motor.
- the electric motor can be controlled with an AC voltage.
- the electric motor can have a multi-pole design.
- the rotation sensor can be a rotor position sensor.
- the rotation sensor may have a sensing element and a rotating element.
- the rotary element can be connected to the rotor and can be rotated about the axis of rotation.
- the rotary element can be arranged on the front side of the rotor.
- the rotating element can have a plurality of sub-segments arranged on the peripheral side.
- the rotary element can have sub-segments arranged on the peripheral side.
- the sub-segment can be a circle segment.
- the individual sub-segment can be designed as a magnetized pair of poles.
- the number of sub-segments can be equal to the number n of pole pairs of the electric motor.
- the measuring element can output an analogue sensor signal.
- the sensor signal can be a sinusoidal sensor signal or a cosinusoidal sensor signal. If the sub-segments are incorrectly positioned, the rotational position can still be precisely detected using the proposed
- the measuring element can be designed as a Hall sensor.
- the sensing element may be axially opposite to the rotating element.
- the measuring element can be fixed to the housing.
- the rotational position is preferably determined independently of a rotational speed and/or rotational acceleration of the rotor.
- the sequence of measured values has at least two measured values that are immediately before the first point in time.
- the sequence of measured values can have a number of measured values that corresponds to the number of reference values of the sensor measured value reference. This allows an exact comparison of the measured values to be carried out.
- the rotation sensor has a first sensor element and a second sensor element and at least one of the measured values includes a first partial measured value of the first sensor element and a second partial measured value of the second sensor element.
- the first partial measured value can be calculated using a sensor signal from the first sensor element and the second partial measured value can be calculated using a sensor signal from the second sensor element.
- the first sensor element can be designed as a first measuring element.
- the second sensor element can be designed as a second measuring element.
- the first and second sensor element can be offset from one another by 90° about the axis of rotation.
- the first and/or second measuring element can be designed as a Hall sensor.
- a preferred embodiment of the invention is advantageous in which each of the reference values and/or the measured values from the sequence of measured values includes the first partial measured value and the second partial measured value.
- the reference value and/or the measured value can also include more than two partial measured values.
- the first partial measured value is an amplitude of a sinusoidal sensor signal of the first sensor element.
- the first partial measured value can also be a phase and/or an offset of the sinusoidal sensor signal.
- the second partial measured value is an amplitude of a cosine-shaped sensor signal of the second sensor element.
- the second partial measured value can also be a phase and/or an offset of the cosine-shaped sensor signal.
- the electric motor has n pairs of poles and the sensor measured value reference has at least n reference values.
- the number of reference values can be equal to the number of pole pairs of the electric motor.
- a preferred embodiment of the invention is advantageous in which at least one reference value is assigned to each rotational position corresponding to a respective pair of poles.
- the rotational position to be determined and the electrical period of the electric motor can be limited to the associated pair of poles.
- At least one of the objects specified above is achieved by a method for determining an electrical angular position of a rotor assigned to an electric motor, with which the electrical angular position is determined by calculating a profile of an angular deviation of the electrical angular position as a function of the rotational position determined as described above and the electrical angular position is corrected depending on the angular deviation.
- At least one of the objects specified above is achieved by a method for electrically activating an electric motor by commutation depending on an electrical angular position of the rotor determined as described above.
- the electrical angular position for commutation can be recorded more precisely.
- the electrical angular position can be determined more independently of mechanical errors and tolerances.
- the commutation is preferably set as a function of the corrected electrical angular position.
- the corrected electrical angular position can be determined more cost-effectively and thereby the electrical control of the electric motor can be carried out more cost-effectively.
- the electric motor can be controlled more precisely electrically.
- the angular deviation can form a correction value for the commutation based on the electrical angular position.
- the electrical angle position can be calculated from a sensor signal of the rotation sensor, preferably from the sensor signal of the first sensor element and the sensor signal of the second sensor element, preferably via an arctangent function, in particular atan2 function.
- the electrical angular position can be determined precisely and inexpensively.
- the cosine and sinusoidal sensor signals can be used as input signals for calculating the electrical angular position.
- FIG. 1 A section of a three-dimensional view of a rotor for use in a method in a special embodiment of the invention.
- FIG. 2 A method for determining a rotational position in a special embodiment of the invention.
- FIG. 3 A course of an angular deviation of the electrical angular position from the rotary position.
- Figure 4 A sensor reading reference and a sequence of readings.
- FIG. 1 shows a section of a three-dimensional view of a rotor for use in a method in a special embodiment of the invention.
- the electric motor 10 includes a rotor 12, which is rotatable about an axis of rotation 14 and a stator, not shown here.
- the stator is preferably arranged radially inside the rotor 12 and includes three-phase windings that are electrically controlled by commutation in order to drive the rotor 12 .
- the electric motor 10 has a multi-pole design and has a number n of pole pairs 16 .
- the pairs of poles 16 are formed by permanent magnets 18 which are arranged on an inner circumference of the rotor 12 .
- the permanent magnets 18 are used to follow the magnetic field emanating from the three-phase windings so that the rotor 12 rotates about the axis of rotation 14 .
- a rotary element 20 constructed in the form of a ring is arranged on the end face of the rotor 12 .
- the rotary element 20 has a predetermined number of sub-segments, which each comprise at least one pair of poles 22 and are arranged alternately around the axis of rotation 14 on the circumferential side.
- the permanent magnets 18 have the same number of pole pairs 16 as the rotating element 20 .
- a pair of poles 22 of the rotating element 20 is formed by two oppositely magnetized magnetic poles N, S.
- the number of permanent magnets 18 is specified by the number of pole pairs 16 of the rotor 12, whereby the number of magnetic poles N, S on the rotating element 20 is preferably also specified.
- a magnetic field of the rotating element 20 can be detected by measuring elements, in particular Hall sensors.
- the measuring elements can be located axially opposite the rotary element 20 and can preferably be firmly connected to the stator.
- FIG. 2 shows a method 100 for determining a rotational position in a special embodiment of the invention.
- Method 100 for determining a rotational position of a rotor can be used during operation of the electric motor.
- the rotary position of the rotor is determined as a function of measured values from a rotary sensor by a measurement signal 104 of the rotary sensor being detected and recorded in an introductory step 102 at a first point in time during operation of the rotor.
- the measurement signal 104 is preferably an analog signal and includes in particular a sinusoidal sensor signal 104.1 and a cosinusoidal sensor signal 104.2.
- the sinusoidal sensor signal 104.1 can be provided by a first sensor element of the rotary sensor and the cosinusoidal sensor signal 104.2 can be provided by a second sensor element of the rotary sensor.
- the measurement signal 104 is processed in a next step 106 and output as a processed measurement signal 108 .
- An amplitude, phase and/or an offset of the respective sensor signal 104.1, 104.2 can be evaluated and processed in a further step 110.
- the electrical angular position ⁇ p e of the rotor is calculated from this.
- a sensor measured value reference 118 is used, which includes a fixed sequence of reference values R, as shown in FIG. 4a).
- the reference values R are preferably measured values of the rotation sensor, which are associated with an actual and verified rotational position of the rotor.
- the reference values R can be recorded and stored, for example, before commissioning, in particular before initial commissioning, of the rotor and, as shown in FIG R1, which is for example an amplitude of a sinusoidal sensor signal of the first sensor element, and a second partial measured value R2, which is an amplitude of a cosinusoidal sensor signal of the second sensor element, and are assigned to the respective pole segment k of the rotor.
- the reference values R can be determined during operation of the electric motor, in particular during step 106 .
- the measured values recorded prior to the first point in time are used as a sequence 120 of measured values to determine the rotational position p r of the rotor at a first point in time.
- the sequence 120 of measured values M contains the same number of measured values M as in the sensor measured value reference.
- the rotational position present on the rotor at the first point in time X is calculated as a function of a comparison between the sequence 120 of measured values X and X-1 to X-9 that precede the point in time X and the sequence of reference values of the sensor measured value reference from FIG. 4 a).
- the comparison of the sequence 120 of the measured values M to the sequence of the reference values R can take place via a cyclic convolution. The comparison can be created and updated during operation of the electric motor in parallel with the determination of the rotational position, without impairing the operation of the electric motor.
- angle discrepancies A p recorded in advance can be taken into account and corrected in a subsequent step 122 using the determined electrical angular position ⁇ e and the rotational position p r .
- the commutation of the electric motor can be calculated depending on the determined rotational position p r , the electrical angular position ⁇ pe and a previously determined curve between the angular deviation A ⁇ p of the electrical angular position ⁇ pe depending on the rotational position p r .
- a course of the angular deviation A p is shown in FIG. 3 by way of example over the rotational position p r .
- the angular deviation A p to be taken into account can be calculated via the stored profile of the angular deviation A p from the determined rotational position p r .
- the sequence of reference values R and a course of angular deviations A p can be determined using a method from the field of sensorless control.
- the course of the angular deviation A p can be recorded in advance, for example after production of the electric motor and initial commissioning and/or during operation of the electric motor.
- the course of the deviation can be stored functionally or in a lookup table. When determining the course of the deviation, mechanical tolerances can be taken into account.
- the rotary sensor can be suitably modified.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202180078100.4A CN116569474A (zh) | 2020-12-04 | 2021-05-28 | 用于确定旋转位置的方法、用于确定电角度位置的方法以及用于驱动电动马达的方法 |
| US18/039,025 US12334857B2 (en) | 2020-12-04 | 2021-05-28 | Method for ascertaining a rotary position, method for ascertaining an electrical angular position and method for driving an electric motor |
| DE112021006313.8T DE112021006313A5 (de) | 2020-12-04 | 2021-05-28 | Verfahren zur Ermittlung einer Drehposition, Verfahren zur Ermittlung einer elektrischen Winkelposition und Verfahren zur Ansteuerung eines Elektromotors |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020132310.7 | 2020-12-04 | ||
| DE102020132310 | 2020-12-04 | ||
| DE102021113301.7A DE102021113301A1 (de) | 2020-12-04 | 2021-05-21 | Verfahren zur Ermittlung einer Rotorposition eines Elektromotors und Verfahren zur Ansteuerung eines Elektromotors |
| DE102021113301.7 | 2021-05-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022117136A1 true WO2022117136A1 (de) | 2022-06-09 |
Family
ID=76421891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2021/100464 Ceased WO2022117136A1 (de) | 2020-12-04 | 2021-05-28 | Verfahren zur ermittlung einer drehposition, verfahren zur ermittlung einer elektrischen winkelposition und verfahren zur ansteuerung eines elektromotors |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US12334857B2 (de) |
| DE (1) | DE112021006313A5 (de) |
| WO (1) | WO2022117136A1 (de) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005024879A1 (de) * | 2005-05-31 | 2006-12-07 | Infineon Technologies Ag | Verfahren zum Bestimmen von Restfehler-Kompensationsparametern für einen magnetoresistiven Winkelsensor und Verfahren zum Verringern eines Restwinkelfehlers bei einem magnetoresistiven Winkelsensor |
| GB2483177A (en) * | 2011-10-19 | 2012-02-29 | Protean Electric Ltd | Electric motor or generator having first and second sensors mounted on stator |
| DE102016207643A1 (de) | 2016-05-03 | 2017-11-09 | Schaeffler Technologies AG & Co. KG | Verfahren zum Bestimmen einer Position eines Läufers einer elektrischen Maschine |
| US20190367093A1 (en) * | 2018-05-30 | 2019-12-05 | Denso Corporation | Rotation detection device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4507591A (en) | 1983-07-26 | 1985-03-26 | Rca Corporation | Linear pulse width to current converter for brushless DC motors |
| ATE488905T1 (de) * | 2004-07-10 | 2010-12-15 | Schaeffler Technologies Gmbh | Verfahren zum betreiben eines ec-motors |
| JP4286883B2 (ja) | 2007-06-27 | 2009-07-01 | 三菱電機株式会社 | 三相ブラシレスモータの制御装置 |
| JP6184134B2 (ja) * | 2013-03-12 | 2017-08-23 | キヤノン株式会社 | モータ駆動装置およびその制御方法 |
| DE102013109877A1 (de) | 2013-09-10 | 2015-03-12 | Zf Lenksysteme Gmbh | Verfahren zur Ansteuerung eines Elektromotors |
| DE102018110075A1 (de) | 2018-04-26 | 2019-10-31 | Schaeffler Technologies AG & Co. KG | Verfahren und Vorrichtung zur Einstellung einer Verstärkung an einem verbauten Magnetfeldsensor |
| JP7257796B2 (ja) * | 2019-01-22 | 2023-04-14 | キヤノン株式会社 | モータ制御装置及び画像形成装置 |
| DE102019126113A1 (de) | 2019-09-27 | 2021-04-01 | Schaeffler Technologies AG & Co. KG | Verfahren zum Kalibrieren eines Synchronmotors |
-
2021
- 2021-05-28 DE DE112021006313.8T patent/DE112021006313A5/de active Pending
- 2021-05-28 WO PCT/DE2021/100464 patent/WO2022117136A1/de not_active Ceased
- 2021-05-28 US US18/039,025 patent/US12334857B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005024879A1 (de) * | 2005-05-31 | 2006-12-07 | Infineon Technologies Ag | Verfahren zum Bestimmen von Restfehler-Kompensationsparametern für einen magnetoresistiven Winkelsensor und Verfahren zum Verringern eines Restwinkelfehlers bei einem magnetoresistiven Winkelsensor |
| GB2483177A (en) * | 2011-10-19 | 2012-02-29 | Protean Electric Ltd | Electric motor or generator having first and second sensors mounted on stator |
| DE102016207643A1 (de) | 2016-05-03 | 2017-11-09 | Schaeffler Technologies AG & Co. KG | Verfahren zum Bestimmen einer Position eines Läufers einer elektrischen Maschine |
| US20190367093A1 (en) * | 2018-05-30 | 2019-12-05 | Denso Corporation | Rotation detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112021006313A5 (de) | 2023-10-05 |
| US12334857B2 (en) | 2025-06-17 |
| US20240007029A1 (en) | 2024-01-04 |
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