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WO2009098143A2 - Machine électrique excitée par aimant permanent pour un appareil électroménager et circuiterie comprenant une machine excitée par aimant permanent - Google Patents

Machine électrique excitée par aimant permanent pour un appareil électroménager et circuiterie comprenant une machine excitée par aimant permanent Download PDF

Info

Publication number
WO2009098143A2
WO2009098143A2 PCT/EP2009/050874 EP2009050874W WO2009098143A2 WO 2009098143 A2 WO2009098143 A2 WO 2009098143A2 EP 2009050874 W EP2009050874 W EP 2009050874W WO 2009098143 A2 WO2009098143 A2 WO 2009098143A2
Authority
WO
WIPO (PCT)
Prior art keywords
winding
circuit arrangement
measuring
stator
coupled
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
Application number
PCT/EP2009/050874
Other languages
German (de)
English (en)
Other versions
WO2009098143A3 (fr
Inventor
Hasan Gökcer ALBAYRAK
Falk Laube
Jörg SKRIPPEK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of WO2009098143A2 publication Critical patent/WO2009098143A2/fr
Publication of WO2009098143A3 publication Critical patent/WO2009098143A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/12—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using detecting coils using the machine windings as detecting coil
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • 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
    • H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
    • 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
    • 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
    • H02P6/14—Electronic commutators
    • H02P6/16—Circuit arrangements for detecting position
    • H02P6/18—Circuit arrangements for detecting position without separate position detecting elements

Definitions

  • the present invention relates to a permanent magnet electric machine for a domestic appliance, in particular for the care of laundry, with a stator having a main winding for generating a magnetic field, with a rotor having at least one permanent magnet and is rotatably mounted relative to the stator , And with a measuring device for determining a rotational speed and / or an angular position of the rotor relative to the stator.
  • the present invention relates to a circuit arrangement with such a permanent-magnet-excited electric machine.
  • domestic appliance is understood in particular to mean a washing machine, a dryer or a washer-dryer.
  • a generated by three Hall sensors usually speed signal is used to control the motor.
  • speed signal is used to control the motor.
  • the rotational speed is nevertheless detected further via the sensor and evaluated via separate electronics. This ensures that additional required safety functions, such as a door lock in a rotating drum, are guaranteed.
  • the object of the present invention is to ensure a speed detection in a permanent magnet excited electrical machine, in particular a redundant speed detection.
  • Rotor which has at least one permanent magnet.
  • the rotor is mounted rotatably movable relative to the stator.
  • the electric machine includes a
  • Measuring device for determining a rotational speed and / or an angular position of the rotor relative to the stator, wherein the measuring device has a separate measuring winding, which is arranged on the stator.
  • a basic idea of the present invention is that the current rotational speed and / or the current angular position of the rotor relative to the stator can be determined by means of a separate measuring winding arranged on the stator.
  • the invention is based on the finding that the rotor inherently carries a permanent magnet, which ensures upon rotation of the rotor that in the measurement winding in the frequency and amplitude speed-proportional voltage is induced, which in particular via a special electronics in a similar manner as a signal a Hall sensor can be evaluated.
  • the rotational speed or the relative angular position of the rotor can be determined in a low-cost manner on the basis of an analogue signal.
  • the electrical machine is designed as an internal rotor.
  • the machine is designed as a sensorless controlled electric machine, wherein the measuring device is preferably designed for redundant speed detection.
  • the rotational speed can be detected by the measuring winding even in the event of a fault, for example in the case of a power electronics defect, winding short circuit, cable breakage or the like, and thus additional required safety functions, such as, for example, a door lock Drum rotation, can be ensured.
  • the stator has a group of teeth, which are arranged radially spaced from a rotation axis, wherein the main winding is formed as a tooth coil.
  • the measurement winding may be formed as a tooth coil.
  • the wrapping of an arbitrary tooth is sufficient for speed detection, wherein for rotor position detection preferably a plurality of teeth, in particular two or three, are wound.
  • a ratio of a number of turns of the main winding to a number of turns of the measuring winding is in a value range between 80 and 120, in particular 100.
  • the measurement winding may be formed of a thinner wire compared to the main winding. Since only a small measuring current and a lower measuring voltage are required, the measuring winding can be formed from very few turns and very thin wire, so that a portion of a groove area formed between two teeth required for the execution is small, and thus only very little space for the main winding is lost.
  • the main winding is wound over the measuring winding, wherein the main winding and the measuring winding are preferably wound by means of a Nadelwicklers.
  • the measuring winding is introduced before the main winding and may preferably be provided with an additional phase insulation. Because of that Main winding is wound over the measuring winding, it is achieved that an additional mechanical protection of the measuring winding is ensured.
  • the measuring winding can be introduced to the stator in the same way and with the same wire thickness as the main winding.
  • the main winding on three coil strands which are designed for operation with three-phase current.
  • a circuit arrangement according to the invention is designed for operating a domestic appliance, in particular for the care of laundry items.
  • the circuit arrangement comprises the permanent magnet excited electric machine according to the invention.
  • the measuring winding is coupled to a test input of a control unit for controlling processes of the domestic appliance.
  • a control unit for controlling processes of the domestic appliance.
  • the control unit may be designed as a microcontroller.
  • the main winding on three coil strands which are designed for operation with three-phase current, and are coupled to a voltage converter, in particular a converter.
  • the voltage converter is coupled to the control unit and controlled by this.
  • the voltage converter is able to convert an AC voltage or a rectified voltage into a three-phase current, with which the electric machine can be supplied.
  • the voltage converter may preferably have a bridge circuit with a plurality of transistors, in particular field-effect transistors.
  • the electric machine can thus be commutated electronically.
  • the rectifier thus constitutes a three-phase current regulator.
  • the skillful coupling of the voltage converter to the control unit ensures that the rotational speed of the rotor detected by means of the measuring winding can be used to control and thus regulate the electrical machine.
  • the voltage converter is coupled to a rectifier, in particular a bridge rectifier, which is coupled to an input of the circuit arrangement. This ensures that an AC voltage from the side of a supply network can be rectified, and thus the voltage converter must be formed only for operation with DC voltage.
  • the rectifier is coupled to the input via an EMC filter. This ensures that no interference signals can be transmitted from the electrical machine in the supply network.
  • a DC link capacitor is connected in parallel to the rectifier and the voltage converter, wherein a voltage divider is preferably connected in parallel to the rectifier and the voltage converter, and between two resistors of the voltage divider a voltage detection is formed, which is coupled to a measuring input of the control unit.
  • the intermediate circuit capacitor is an energy store and preferably has the task of smoothing a DC link voltage having a ripple.
  • the use of the voltage divider with the two resistors ensures that the intermediate circuit voltage can be detected by the control unit.
  • a DC link resistor for absorbing a DC link voltage is connected in parallel to the rectifier or the voltage converter, wherein an electronic control element, in particular a transistor, is connected in series with the DC link resistor, which is controllable by the control unit. This ensures that an excessive DC link voltage can be absorbed and reduced by the DC link resistance.
  • the single FIGURE shows a circuit arrangement for operating a household appliance with a permanent magnet-excited electric machine.
  • a circuit arrangement 1 shown in the figure is designed for operating a household appliance for the care of laundry items, in the present case a washing machine.
  • the home appliance can also be a dryer or a washer-dryer.
  • the circuit arrangement 1 comprises a permanent magnet-excited electric machine 2, which in turn has a stator and a rotor rotatably mounted relative to the stator rotatably mounted.
  • the rotor comprises permanent magnets, wherein the stator is associated with a main winding 3, which in the present case has three coil strands 3a, 3b, 3c.
  • the permanent-magnet-excited electric machine 2 is designed for operation with three-phase current.
  • the three coil strands 3a, 3b, 3c are coupled to a voltage converter 4, which in the present case is designed in the form of a bridge circuit and has the task of an inverter.
  • the circuit arrangement 1 further comprises a control unit 5, which is coupled to the voltage converter 4 via a driver device 6, which provides in favor of safety for a level adjustment of control signals of the control unit 5.
  • the control unit 5 is presently designed as a microcontroller.
  • the voltage converter 4 comprises a plurality of transistors, in the present case field effect transistors, via which the three coil sections 3a, 3b, 3c of the electric machine 2 are commutated.
  • the three coil strands 3a, 3b, 3c in the present case are commutated electronically, wherein the voltage converter 4 is a three-phase regulator.
  • the circuit arrangement 1 also has an input 7, on which an EMC filter 8 is arranged, which has the task of preventing a transmission of interference signals of the circuit arrangement 1 in a supply network, and thus the supply network and other devices connected to the supply network devices protect.
  • the EMC filter 8 is coupled to a rectifier 9, which is designed here as a bridge rectifier with four diodes.
  • the rectifier 9 is also coupled to the voltage converter 4 via intermediate poles 10, 11. By using the rectifier 9 ensures that the voltage converter 4 is supplied with a rectified voltage.
  • a DC link capacitor 12 is parallel to the rectifier 9 and the Voltage transformer 4 connected. This DC link capacitor 12 has to ensure that the rectifier 9 and the voltage converter 4 energetically couple with each other on a common DC voltage level.
  • the intermediate circuit capacitor 12 is an energy storage, by means of which a ripple of an AC voltage to be smoothed by the supply network.
  • a voltage divider 13 is connected in parallel with the intermediate circuit capacitor 12 between the two intermediate circuit poles 10, 11.
  • the voltage divider 13 comprises two voltage divider resistors 13a, 13b, between which a voltage detection pole 14 is formed.
  • the voltage detection pole 14 is coupled to a measuring input 15 of the control unit 5 of the circuit arrangement 1.
  • a DC link resistor 16 is also provided, which is connected in parallel with the DC link capacitor 12 between the two DC link poles 10, 11.
  • a transistor 17 is connected in series with the intermediate circuit resistor 16, whose control terminal 18 is coupled to an output 19 of the control unit 5.
  • the DC link resistor 16 has the task of optionally absorbing a voltage applied between the two DC link poles 10, 11 voltage and thus to destroy.
  • the serial connection of the DC link resistor 16 to the transistor 17 ensures that a current flowing through the DC link resistor 16 and the transistor 17 can be regulated by the control unit 5 by driving the transistor 17. If the voltage present between the intermediate circuit poles 10, 11 is too great, which can be detected by the control unit 5 via the voltage divider 13, then the transistor 17 is driven, so that current flows via the intermediate circuit resistance 16.
  • the three coil strands 3a, 3b, 3c of the main winding 3 of the stator of the electric machine 2 are coupled to a device 20 for detecting a countervoltage of the electric machine 2.
  • This device 20 is coupled to the control unit 5.
  • a voltage is induced in the main winding 3 even with a motor operation of the electric machine 2.
  • This induced voltage represents the reverse voltage of the electric machine 2.
  • the device 20 is thus capable of an idling speed of the permanent magnet excited electric machine 2 and to detect the current position of the rotor relative to the stator.
  • a rotor position or speed detection is used to drive a sensorless controlled electric machine.
  • the stator of the electric machine 2 comprises a separate measuring winding 21, which in the present case are inserted in grooves of three coil strands 3a, 3b, 3c of the stator in favor of a reliable rotor position detection. These are grooves of the stator, which are formed between each two teeth of the stator. In comparison with the main winding 3, the measuring winding 21 is formed from a few turns, so that the proportion of the groove area required for the execution is very small and thus only very little space for the main winding 3 is lost.
  • the measuring winding 21 is introduced in front of the main winding 3 and comprises an additional phase insulation, not shown, wherein the main winding 3 is wound in the present case over the measuring winding 21, whereby an additional mechanical protection of the measuring winding is ensured.
  • the measuring winding 21 is also coupled to a measuring device 22, which is designed to detect the rotational speed and the position of the rotor with respect to the stator of the electric machine 2.
  • This measuring device 22 is also coupled to the control unit 5.
  • the possibility is given to regulate the rotational speed of the electric machine 2 on the part of the control unit 5 as a function of signals of the measuring device 22.
  • this ensures that in an error case the speed detection required for safety reasons due to the measuring winding 21 and the additional speed detection is ensured. A door lock on a rotating drum is thereby ensured.
  • Another advantage of the measuring winding 21 in the present case is that no additional speed sensor, such as a Hall sensor, is required, whereby a cost-reduced circuit 1 is provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Brushless Motors (AREA)
  • Control Of Washing Machine And Dryer (AREA)

Abstract

L'invention concerne une machine électrique (2) excitée par aimant permanent pour un appareil électroménager, en particulier pour l'entretien du linge. La machine électrique selon l'invention comprend un stator qui présente un enroulement principal (3) servant à générer un champ magnétique, un rotor qui présente au moins un aimant permanent et qui est monté mobile en rotation par rapport au stator, ainsi qu'un dispositif de mesure servant à déterminer une vitesse de rotation et/ou une position angulaire du rotor par rapport au stator. Selon l'invention, le dispositif de mesure présente un enroulement de mesure distinct (21) qui est placé sur le stator.
PCT/EP2009/050874 2008-02-04 2009-01-27 Machine électrique excitée par aimant permanent pour un appareil électroménager et circuiterie comprenant une machine excitée par aimant permanent Ceased WO2009098143A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008007402.0 2008-02-04
DE102008007402A DE102008007402A1 (de) 2008-02-04 2008-02-04 Permanentmagneterregte elektrische Maschine für ein Hausgerät und Schaltungsanordnung mit einer permanentmagneterregten Maschine

Publications (2)

Publication Number Publication Date
WO2009098143A2 true WO2009098143A2 (fr) 2009-08-13
WO2009098143A3 WO2009098143A3 (fr) 2010-01-28

Family

ID=40822175

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/050874 Ceased WO2009098143A2 (fr) 2008-02-04 2009-01-27 Machine électrique excitée par aimant permanent pour un appareil électroménager et circuiterie comprenant une machine excitée par aimant permanent

Country Status (2)

Country Link
DE (1) DE102008007402A1 (fr)
WO (1) WO2009098143A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104374940A (zh) * 2014-09-24 2015-02-25 昆山腾朗电子有限公司 一种齿轮角速度测量装置
DE102018200920A1 (de) * 2018-01-22 2019-07-25 Robert Bosch Gmbh Elektromotor

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03504915A (ja) * 1988-05-25 1991-10-24 パイパー，ジェイムズ　ウイリアム ロータ位置検出技術
FI112733B (fi) * 1994-09-30 2003-12-31 Kone Corp Menetelmä ja laitteisto tahtimoottorin jarruttamiseksi
US5838122A (en) * 1996-02-08 1998-11-17 Seiberco Incorporated Motor initialization method and apparatus
DE19614755A1 (de) * 1996-04-16 1997-10-23 Pm Dm Gmbh Mehrphasiger, bürstenloser Gleichstrommotor
JP3394687B2 (ja) * 1997-07-04 2003-04-07 シャープ株式会社 インバータ装置及び洗濯機
US6066905A (en) * 1997-11-05 2000-05-23 General Electric Company Dynamoelectric machine: quadrature winding retention apparatus
DE10121767A1 (de) * 2001-05-04 2002-11-14 Bosch Gmbh Robert Elektronisch kommutierte Mehrphasen-Synchronmaschine
WO2005060064A1 (fr) * 2003-12-18 2005-06-30 BSH Bosch und Siemens Hausgeräte GmbH Procede de fonctionnement d'un circuit convertisseur d'un lave-linge ou d'un seche-linge
DE102004018767A1 (de) * 2004-04-15 2005-11-03 BSH Bosch und Siemens Hausgeräte GmbH Ansteuervorrichtung für eine elektrische Maschine
EP1748531A1 (fr) * 2005-07-28 2007-01-31 Siemens Aktiengesellschaft procédé de fabrication d'une empilage des tôles statorique comprenant des dents selon une direction radiale intérieure

Also Published As

Publication number Publication date
WO2009098143A3 (fr) 2010-01-28
DE102008007402A1 (de) 2009-08-06

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