WO2017114229A1 - Procédé et dispositif d'identification de phase de rotor de moteur à courant continu, et dispositif électroménager - Google Patents

Procédé et dispositif d'identification de phase de rotor de moteur à courant continu, et dispositif électroménager Download PDF

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Publication number
WO2017114229A1
WO2017114229A1 PCT/CN2016/111047 CN2016111047W WO2017114229A1 WO 2017114229 A1 WO2017114229 A1 WO 2017114229A1 CN 2016111047 W CN2016111047 W CN 2016111047W WO 2017114229 A1 WO2017114229 A1 WO 2017114229A1
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WO
WIPO (PCT)
Prior art keywords
phase
motor
rotor
identified
resistor
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Application number
PCT/CN2016/111047
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English (en)
Chinese (zh)
Inventor
李益爱
骆建立
Original Assignee
广东美的环境电器制造有限公司
美的集团股份有限公司
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Application filed by 广东美的环境电器制造有限公司, 美的集团股份有限公司 filed Critical 广东美的环境电器制造有限公司
Publication of WO2017114229A1 publication Critical patent/WO2017114229A1/fr

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    • 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
    • H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings

Definitions

  • the present invention relates to the field of home appliances, and in particular to a method, device and household appliance for identifying a rotor phase of a DC motor.
  • FIG. 1 is a schematic structural view of a motor system used in the fan.
  • the motor system includes a DC power source 10, a control device 20, a DC motor 30, and a Hall element 40.
  • the control device 20 of the fan senses a position signal of the DC motor rotor through the Hall element 40, thereby controlling the start of the fan according to the position signal. , stop, brake, forward and reverse.
  • a DC motor equipped with a Hall element is costly, and the Hall element needs to be embedded inside the motor, which is difficult to assemble, and the motor casing is bulky.
  • the present invention provides a method for identifying a rotor phase of a DC motor, the method comprising: respectively detecting a back electromotive force Ua, Ub, Uc of a three-phase winding of a DC motor; and comparing the Ua, Ub, The relationship between Uc to identify the phase of the DC motor rotor.
  • the rotor phase is identified as 60-120°; in the case of Ub>Ua>Uc, the rotor phase is identified as 120-180°; in the case of Ub>Uc>Ua, the rotor phase is identified as 180 -240°; in the case of Uc>Ub>Ua, the rotor phase is identified to be 240-300°; and in the case of Uc>Ua>Ub, the rotor phase is identified to be 300-360°.
  • the back electromotive force Ua, Ub of the three-phase winding of the direct current motor can be respectively detected by three voltage detecting devices, Uc.
  • the present invention also provides an apparatus for identifying a rotor phase of a DC motor, the apparatus comprising: a voltage detecting device for detecting a back electromotive force Ua, Ub, Uc of a three-phase winding of the DC motor; and a phase identifying device, Used to compare the relationship between the Ua, Ub, Uc to identify the phase of the DC motor rotor.
  • the phase identification device is configured to: identify a rotor phase of 0-60° in the case of Ua>Uc>Ub; and identify a rotor phase of 60-120° in the case of Ua>Ub>Uc; >Ua>Uc, the rotor phase is identified as 120-180°; in the case of Ub>Uc>Ua, the rotor phase is identified as 180-240°; in the case of Uc>Ub>Ua, the rotor phase is identified as 240-300°; and in the case of Uc>Ua>Ub, the rotor phase is identified to be 300-360°.
  • the voltage detecting device includes three voltage detecting devices for detecting the back electromotive forces Ua, Ub, and Uc, respectively.
  • the circuit structure of each of the three voltage detecting devices is the same, and the first voltage detecting device of the three voltage detecting devices includes: a resistor R1, a resistor R2, and a resistor R3, wherein the resistor R1 and One end of the series circuit formed by connecting resistors R2 in series is connected to one phase winding of the DC motor, and the other end is grounded.
  • One end of the resistor R3 is connected between the resistor R1 and the resistor R2, and the other end is used as an output terminal to calculate the inverse of the phase winding.
  • Ua To the electromotive force Ua.
  • the first voltage detecting device further includes a diode ZD1 and a capacitor C1.
  • the diode ZD1 and the capacitor C1 are respectively connected to the two ends of the resistor R3, and the other ends are respectively grounded.
  • the present invention also provides a home appliance comprising: a DC motor; the above-mentioned device for identifying a rotor phase of a DC motor; and control means for, according to the device for identifying a rotor phase of a DC motor The identified DC motor rotor phase controls the rotation of the DC motor.
  • the household appliance can be a fan.
  • the three-phase back electromotive force detecting circuit of the invention has the advantages of simple structure, convenience and low cost.
  • FIG. 1 is a schematic structural view of a conventional motor system
  • FIG. 2 is a schematic structural view of another embodiment of a conventional motor system
  • FIG. 3 is a schematic structural view of a motor system provided in a household appliance provided by the present invention.
  • FIG. 4 is a circuit diagram showing a motor drive circuit and a voltage detecting device
  • Figure 5 is a schematic diagram showing the relationship between the back electromotive forces Ua, Ub, Uc of the three-phase winding of the DC motor and the phase of the rotor.
  • FIG. 3 is a schematic structural view of a motor system provided in a household appliance provided by the present invention.
  • the present invention also provides a motor system disposed in a home appliance (for example, a fan), the system comprising: a DC power source 10, a DC motor 30, an apparatus 100 for identifying a rotor phase of the DC motor, and The identified rotor phase controls the control device 20 of the direction of rotation of the DC motor.
  • the control device 20 can first supply power to the DC motor 30 by using the DC power source 10 to activate the DC motor 30; and then use the device 100 for identifying the rotor phase of the DC motor to identify the rotor phase of the DC motor, and according to This phase controls the direction of rotation of the DC motor 10.
  • This solution eliminates the need for a Hall device to quickly identify the phase of the DC motor rotor and quickly adjust the fan's direction of operation.
  • the device 100 for identifying the rotor phase of the DC motor may include: a voltage detecting device 110 for detecting back electromotive forces Ua, Ub, Uc of the three-phase winding of the DC motor; and a phase identifying device 120 for The Ua, Ub, Uc are compared to identify the phase of the DC motor rotor.
  • the phase identification device 120 may identify that the rotor phase is 0-60° in the case of Ua>Uc>Ub; and identify the rotor phase as 60-120° in the case of Ua>Ub>Uc; In the case of Ub>Ua>Uc, the rotor phase is identified as 120-180°; in the case of Ub>Uc>Ua, the rotor phase is identified as 180-240°; in the case of Uc>Ub>Ua Next, the rotor phase is identified as 240-300°; and in the case of Uc>Ua>Ub, the rotor phase is identified to be 300-360°.
  • Fig. 4 is a circuit diagram showing a motor drive circuit and a voltage detecting device.
  • the DC motor driver 200 can output a three-phase current to the DC motor 30 according to the PWM signal of the control device 20 to drive the DC motor 30 to operate.
  • the present invention provides three voltage detecting devices for the three-phase windings of the DC motor 30 to detect the back electromotive forces Ua, Ub, Uc of the three-phase windings.
  • the circuit structure of the three voltage detecting devices can be as shown in FIG. 4, the motor is equal to a generator, and the back electromotive force is the three-phase electromotive force of the generator.
  • the voltage detecting device for detecting the back electromotive force Ua includes: a resistor R1, a resistor R2, and a resistor R3, wherein a series circuit formed by connecting the resistor R1 and the resistor R2 in series is connected to one phase winding of the DC motor, and One end is grounded, and one end of the resistor R3 is connected between the resistor R1 and the resistor R2, and the other end is used as an output terminal to calculate the back electromotive force Ua of the phase winding.
  • the voltage Ua is divided by the resistor R1 and the resistor R2, and satisfies the following formula:
  • Uar is the voltage of the output terminal
  • R1 and R2 are resistance values of the resistor R1 and the resistor R2, respectively.
  • the voltage Ua can be calculated by the following formula:
  • phase identification device and the control device of the present invention can be implemented as a control chip (for example, a single chip microcomputer).
  • the voltage Uar in FIG. 4 can be directly input to the AD port of the control chip by the control.
  • the chip calculates the back electromotive force Ua based on the voltage Uar and the above formula (2).
  • the voltage detecting device for detecting the back electromotive force Ua further includes: a diode ZD1 and a capacitor C1, wherein the diode ZD1 and the capacitor C1 are respectively connected to both ends of the resistor R3, and the other ends are respectively grounded.
  • the output voltage Uar of the output terminal can be maintained stable.
  • FIG. 5 also shows a schematic diagram of the relationship between the back electromotive forces Ua, Ub, Uc of the three-phase winding of the DC motor and the phase of the rotor.
  • the phase identification device can determine the specific phase of the rotor of the DC motor based on the detected magnitudes of the Ua, Ub, and Uc electromotive forces in combination with the above table or FIG.
  • the present invention also provides a method for identifying a rotor phase of a DC motor, the method comprising: detecting a back electromotive force Ua, Ub, Uc of the three-phase winding of the DC motor; and comparing the Ua, Ub, Uc to identify the phase of the DC motor rotor.
  • the phase of the rotor of the DC motor can be quickly recognized at the moment of starting the fan and the running direction of the fan can be quickly adjusted without using the Hall device.
  • the three-phase back electromotive force detecting circuit of the invention has the advantages of simple structure, convenience and low cost.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne un procédé et un dispositif d'identification de phase de rotor d'un moteur à courant continu (CC) (30), et un dispositif électroménager pouvant identifier instantanément une phase d'un rotor d'un moteur CC (30) et régler rapidement un sens de rotation d'un ventilateur lors du démarrage du ventilateur. Le procédé d'identification de phase de rotor d'un moteur CC (30) consiste : à détecter des forces contre-électromotrices Ua, Ub et Uc d'un enroulement triphasé d'un moteur CC (30) ; et à comparer Ua, Ub et Uc pour identifier une phase d'un rotor du moteur CC (30).
PCT/CN2016/111047 2015-12-31 2016-12-20 Procédé et dispositif d'identification de phase de rotor de moteur à courant continu, et dispositif électroménager WO2017114229A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201511033639.0 2015-12-31
CN201511033639.0A CN105490595A (zh) 2015-12-31 2015-12-31 一种用于识别直流电机转子相位的方法、设备及家用电器

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WO2017114229A1 true WO2017114229A1 (fr) 2017-07-06

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Publication number Priority date Publication date Assignee Title
CN105490595A (zh) * 2015-12-31 2016-04-13 广东美的环境电器制造有限公司 一种用于识别直流电机转子相位的方法、设备及家用电器

Citations (5)

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Publication number Priority date Publication date Assignee Title
CN101931353A (zh) * 2010-01-29 2010-12-29 梁伟 汽车空调风扇用无刷直流电机控制方法
CN102055392A (zh) * 2010-12-17 2011-05-11 北京控制工程研究所 一种无刷直流电机无传感器线反电势位置检测方法
CN103018541A (zh) * 2012-11-06 2013-04-03 中南林业科技大学 无刷直流电机反电势过零检测电路及检测方法
US9000703B2 (en) * 2012-11-28 2015-04-07 Stmicroelectronics Asia Pacific Pte. Ltd. Back EMF detection in a brushless DC motor using a virtual center tap circuit
CN105490595A (zh) * 2015-12-31 2016-04-13 广东美的环境电器制造有限公司 一种用于识别直流电机转子相位的方法、设备及家用电器

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Publication number Priority date Publication date Assignee Title
CN101262196B (zh) * 2008-04-29 2010-06-02 重庆大学 检测无位置传感器无刷直流电机转子位置的方法
CN103633904A (zh) * 2013-12-09 2014-03-12 国网上海市电力公司 无位置传感器的无刷直流电机控制方法及控制系统
CN104779850A (zh) * 2015-03-19 2015-07-15 四川长虹电器股份有限公司 一种反电动势检测电路

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101931353A (zh) * 2010-01-29 2010-12-29 梁伟 汽车空调风扇用无刷直流电机控制方法
CN102055392A (zh) * 2010-12-17 2011-05-11 北京控制工程研究所 一种无刷直流电机无传感器线反电势位置检测方法
CN103018541A (zh) * 2012-11-06 2013-04-03 中南林业科技大学 无刷直流电机反电势过零检测电路及检测方法
US9000703B2 (en) * 2012-11-28 2015-04-07 Stmicroelectronics Asia Pacific Pte. Ltd. Back EMF detection in a brushless DC motor using a virtual center tap circuit
CN105490595A (zh) * 2015-12-31 2016-04-13 广东美的环境电器制造有限公司 一种用于识别直流电机转子相位的方法、设备及家用电器

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