EP2514090A1 - Carte de commande pour moteur à courant continu sans balais - Google Patents

Carte de commande pour moteur à courant continu sans balais

Info

Publication number
EP2514090A1
EP2514090A1 EP10787149A EP10787149A EP2514090A1 EP 2514090 A1 EP2514090 A1 EP 2514090A1 EP 10787149 A EP10787149 A EP 10787149A EP 10787149 A EP10787149 A EP 10787149A EP 2514090 A1 EP2514090 A1 EP 2514090A1
Authority
EP
European Patent Office
Prior art keywords
microprocessor
motor
duty cycle
control card
phase
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.)
Withdrawn
Application number
EP10787149A
Other languages
German (de)
English (en)
Inventor
Tayyar Cagdas Cirpan
Reyhan Turk
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of EP2514090A1 publication Critical patent/EP2514090A1/fr
Withdrawn legal-status Critical Current

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
    • H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
    • 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
    • H02P7/29—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 pulse modulation

Definitions

  • the present invention relates to a control card that controls a brushless direct current motor used in household appliances.
  • brushless direct current motors are preferred in terms of their high efficiency and silent operation.
  • the brushless direct current motors are generally of three phase structure and are driven by the 120 degree trapezoidal wave form drive method.
  • the electronic circuit structure providing speed control of the motor is of simple configuration and lower cost, however in the transition moments referred to as commutation wherein the motor current is transferred from one phase to the other phase, oscillations occur in the electric current supplied to the motor. The oscillations in the electric current causes the moment applied by the motor to also oscillate and thus results in the increase of noise.
  • a microprocessor disposed in the motor control card compares the predetermined reference speed with the actual speed of the motor and generates PWM (pulse width modulation) signals having the suitable duty cycle in order to bring the motor speed to the reference speed, however the PWM signals cannot respond to the current oscillation during the commutation ( Figure 1 ). Decreasing the current oscillation during commutation is also possible by controlling the phase currents directly with control of the current however the current detection resistor and analog signal amplifier circuit are required in order to maintain current control. The current control furthermore brings a considerable load to the microprocessor.
  • PWM pulse width modulation
  • the aim of the present invention is the realization of a control card that provides speed control of the brushless direct current motors used in household appliances like the dishwasher and the washing machine and decreases the motor noise.
  • the control card realized in order to attain the aim of the present invention and explicated in the claims, comprises a converter that converts AC voltage to DC voltage, a three-phase inverter which transforms the direct current received from the converter to three-phase current by means of the transistors and a microprocessor having a speed controller providing speed control of the motor by actuating the transistors in the three-phase inverter.
  • the microprocessor compares the actual speed of the motor with the predetermined reference speed depending on the data received from the sensing unit which detects the rotor position and hence the rotational speed of the rotor by means of the hall sensors or the back EMF
  • PWM pulse width modulation
  • the microprocessor applies at least one generated PWM by increasing the duty cycle in the commutation duration wherein the current supplied to the motor is transferred from one phase to the other in the three-phase inverter.
  • the microprocessor calculates the duty cycle of at least one PWM generated thereby by multiplying with a coefficient that is greater than one.
  • the microprocessor during the commutation, applies more than one consecutive PWM signals by increasing the duty cycle.
  • microprocessor In another embodiment of the present invention, the microprocessor
  • the microprocessor applies the PWM signals generated thereby during the entire commutation by increasing the duty cycle.
  • the microprocessor applies one or more PWM signals by increasing the duty cycle only at the beginning of the commutation.
  • Figure 1 - is the schematic view of a control card.
  • Figure 2 - is the graph of the current applied to a electric motor
  • Figure 3 - is the graph of the current applied to an electric motor
  • BLDC motor (M) comprises an AC-DC converter (2) for converting the AC mains voltage to DC voltage, a three-phase inverter (3) which transforms the direct current received from the AC-DC converter (2) to three phase (A, B, C) current by means of the transistors, a sensing unit (4) that detects the rotor position and hence the speed by hall sensors or by back EMF measurement method and a microprocessor (5) that provides speed control of the motor (M) by actuating the transistors in the three-phase inverter (3) with the signals received from the sensing unit (4).
  • the microprocessor (5) compares the actual speed of the motor (M) with the predetermined reference speed depending on the data received from the sensing unit (4), controls the operation of the transistors in the three-phase inverter (3) by generating PWM (pulse width modulation) signals having the suitable duty cycle by means of the PI (proportional integral) algorithm included in its software and changes the speed of the motor (M) to the reference speed.
  • PWM pulse width modulation
  • the microprocessor (5) applies at least one PWM signal generated thereby by increasing the duty cycle.
  • the microprocessor (5) calculates the duty cycle of the PWM signals
  • the microprocessor (5) generates PWM signals having suitable duty cycle by comparing the actual speed of the motor (M) with the reference speed during operation of the motor (M) and adjusts the phase currents triggered by the PWM signals to a level that will bring the motor (M) to the reference speed and the PWM duty cycle determined by the PI control algorithm is increased during the commutation (X) providing to raise the phase current rapidly while passing from one phase to the other. Consequently, the microprocessor (5) decreases the current oscillations observed during the commutation (X), the moment oscillations and hence the acoustic noise during the operation of the motor (M) are decreased as a result of decreasing the current oscillations.
  • the coefficient (K) to be multiplied with the duty cycles of the PWM signals generated by the PI algorithm in the software of the microprocessor (5) is determined according to the relation between the pole number of the motor (M), the switching frequency and the electrical time constant of the motor (M). If the operating conditions of the motor (M) changes, modifications in the software of the microprocessor (5) can be made easily, for example only the value of the K coefficient can be changed, and the noise of the motor (M) is decreased by accommodating to different operating conditions.
  • the microprocessor (5) applies more than one consecutive PWM signals by increasing the duty cycle.
  • the microprocessor (5) applies the PWM signals generated thereby during the entire commutation (X) by increasing the duty cycle.
  • the microprocessor (5) applies one or more PWM signals by increasing their duty cycles only at the beginning of the commutation (X) and applies the PWM signals with duty cycles determined by the PI control algorithm in the remaining duration of the commutation (X).
  • the signals generated by the microprocessor (5) with increased duty cycle is directly proportional to the switching frequency in the three-phase inverter (3). For example, in the case wherein the switching frequency is 5 kHz, if the number of PWM signals with its duty cycle multiplied by the coefficient K is S1 , when the switching frequency is 10 kHz, then the number of PWM signals with its duty cycle multiplied by the coefficient K becomes S2 (S2>S1).
  • the coefficient K to be multiplied for increasing the duty cycle of the PWM signals generated by the microprocessor (5) is directly proportional to the electrical time constant (L/R) of the motor (M).
  • L/R electrical time constant
  • the duty cycle of the PWM signal is applied by multiplying with a coefficient K that is for example greater than 2.
  • control card (1 ) of the present invention by protecting the known speed feedback structure, a low current oscillation and hence a low moment oscillation is attained during the commutation (X) and the noise of the motor (M) is decreased by means of only the increase made in the duty cycle of the PWM signals applied by the microprocessor (5). An additional current control element is not required for decreasing the current oscillation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Inverter Devices (AREA)

Abstract

La présente invention porte sur une carte de commande de moteur (1) utilisée pour commander les moteurs à courant continu sans balais (BLDC), comprenant un onduleur triphasé (3) qui transforme le courant continu (CC) reçu du convertisseur CA-CC (2) en courant triphasé au moyen de transistors, une unité de détection (4) qui détecte la position du rotor, un microprocesseur (5) qui assure une commande de vitesse du moteur (M) par génération de signaux de modulation d'impulsions en durée (PWM) ayant un rapport cyclique approprié au moyen de l'algorithme PI inclus dans son logiciel. Le microprocesseur (5) applique un signal PWM généré par augmentation du rapport cyclique pendant la durée de commutation (X), le courant appliqué au moteur (M) étant transféré d'une phase à l'autre dans l'onduleur triphasé (3), afin de réduire les oscillations de couple et, par conséquent, le bruit du moteur. Les moteurs à courant continu sans balais sont utilisés dans des appareils ménagers tels que les lave-vaisselle ou les lave-linge.
EP10787149A 2009-12-15 2010-12-13 Carte de commande pour moteur à courant continu sans balais Withdrawn EP2514090A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200909436 2009-12-15
PCT/EP2010/069484 WO2011073127A1 (fr) 2009-12-15 2010-12-13 Carte de commande pour moteur à courant continu sans balais

Publications (1)

Publication Number Publication Date
EP2514090A1 true EP2514090A1 (fr) 2012-10-24

Family

ID=43501556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10787149A Withdrawn EP2514090A1 (fr) 2009-12-15 2010-12-13 Carte de commande pour moteur à courant continu sans balais

Country Status (3)

Country Link
EP (1) EP2514090A1 (fr)
CN (1) CN102714476B (fr)
WO (1) WO2011073127A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104767431B (zh) * 2015-04-02 2018-08-28 上海晶丰明源半导体股份有限公司 一种直流无刷电机脉冲宽度调制的控制方法、装置和系统
FR3055759B1 (fr) * 2016-09-02 2020-10-30 Mmt ag Ensemble mecatronique pilote par un signal en modulation de largeur d’impulsion

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3239532B2 (ja) * 1993-05-13 2001-12-17 株式会社日立製作所 電動機駆動装置
US6718125B2 (en) 2000-09-26 2004-04-06 Emerson Motor Co. BLDC motor noise reduction using constant bus current control commutation
KR100457360B1 (ko) * 2002-06-22 2004-11-16 한국과학기술연구원 커뮤테이션 토크리플을 저감하는 비엘디씨 모터 구동시스템 및 그 방법
JP2005094875A (ja) * 2003-09-16 2005-04-07 Matsushita Electric Ind Co Ltd ブラシレスｄｃモータの駆動方法及びその装置
CN100456622C (zh) * 2005-04-05 2009-01-28 国际整流器公司 可变速的无刷直流电机驱动电路

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011073127A1 *

Also Published As

Publication number Publication date
WO2011073127A1 (fr) 2011-06-23
CN102714476B (zh) 2015-08-19
CN102714476A (zh) 2012-10-03

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