CN102714476B - For the control card of brshless DC motor - Google Patents
For the control card of brshless DC motor Download PDFInfo
- Publication number
- CN102714476B CN102714476B CN201080057302.2A CN201080057302A CN102714476B CN 102714476 B CN102714476 B CN 102714476B CN 201080057302 A CN201080057302 A CN 201080057302A CN 102714476 B CN102714476 B CN 102714476B
- Authority
- CN
- China
- Prior art keywords
- motor
- duty ratio
- pwm signal
- microprocessor
- 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.)
- Expired - Fee Related
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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
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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
- 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
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
The present invention relates to the motor control card (1) for controlling brushless direct-current (BLDC) motor, it has: three-phase inverter (3), and the DC converting received from AC-DC converter (2) is three-phase current by means of transistor by it; Sensing cell (4), its detection rotor position; Microprocessor (5), it provides speeds control by generating the pulse width modulation (PWM) signal with suitable duty ratio by means of the PI algorithm be included in its software to motor (M).Microprocessor (5) by increasing the pwm signal that duty ratio applies to generate thus in the duration being applied to the commutation (X) of the electric current on motor (M) from a phase transformation to other phase in three-phase inverter (3), to reduce torque oscillation and therefore motor noise.Brushless direct-current (BLDC) motor is used in the such household electrical appliance of such as dishwasher or washing machine.
Description
Technical field
The present invention relates to control card, it controls the brshless DC motor used in household electrical appliance.
Background technology
Especially, in pump used in the major cycle in the household electrical appliance as dishwasher and washing machine or water emissions operation, brush-less Dc motor device is preferred due to their high efficiency and mute operation.Brshless DC motor is substantially three-phase structure, and is driven by 120 degree of trapezoidal waveform driving methods.In trapezoidal driving method, the electric circuit construction providing motor speed to control has easy configuration and low cost, but be the transient time of another phase at the current of electric being referred to as commutation (commutation) from a phase transformation, be fed in the electric current of motor and occur vibration.Vibration in electric current causes the moment applied by motor and also vibrates and thus cause noise to increase.In addition, in the prior art, the microprocessor be placed in motor control card compares the predetermined reference speed of motor and actual speed and generates PWM (pulse width modulation) signal with suitable duty ratio and becomes reference velocity to make motor speed, but pwm signal can not make response (Fig. 1) to the current oscillation produced during commutation.Also by utilizing, phase current is directly controlled to alleviate the current oscillation during commutating to the control of electric current, but need current sensing resistor and analog signal amplifier circuit to maintain Current Control.Current Control is returned microprocessor and is brought remarkable load.
In the prior art of international patent application No. WO0227912, explain a kind of electric machine control system, it applies to round off effect (rounding effect) to reduce the noise generated during commutation passage to rectangular wave phase current.Driving the electric current of described motor from a phase transformation to another phase time, by means of the phaseswitch be in transformation simultaneously, two overlap, and reduce the vibration of electric current by providing increase suddenly in the commutation moment.
Summary of the invention
The object of the invention is to realize a kind of control card, its in the household electrical appliance as dishwasher and washing machine the brshless DC motor that uses speeds control is provided and reduces motor noise.
Realize this control card to reach object of the present invention and to explain in the claims, this control card comprises: transducer, and AC voltage transitions is become DC voltage by it, three-phase inverter, its by means of transistor by from converter accepts to DC converting be three-phase current; And microprocessor, it has speed control, and speed control provides the speeds control of motor by the transistor of actuating in described three-phase inverter.This microprocessor compares actual speed and the predetermined reference speed of motor according to the data received from sensing cell, and sensing cell carrys out the rotary speed of detection rotor position and therefore rotor by means of Hall element or back electromotive force measuring unit; Control the operation of the transistor in three-phase inverter; And, by generating duty cycle pulse width modulated (PWM) signal by means of the PI algorithm be included in its software, the speed of motor is changed into reference velocity.
In this embodiment of the invention, microprocessor by increasing duty ratio and apply at least one PWM generated being applied to the electric current on motor in three-phase inverter within a commutation duration forwarding other phase mutually to.
During commutating, microprocessor calculates the duty ratio of at least one PWM generated thus by being multiplied by the coefficient being greater than.
In one embodiment of this invention, during commutating, microprocessor applies more than one consecutive PWM signal by increasing duty ratio.
In another embodiment of the invention, microcontroller applies pwm signal generated thus by increasing duty ratio during whole commutation.
In another embodiment of the invention, microprocessor applies one or more pwm signal by only increasing duty ratio when commutating and starting.
In another embodiment of the invention, be directly proportional to the switching frequency in three-phase inverter by the quantity of the duty ratio and the pwm signal generated by microprocessor that increase them.
In another embodiment of the invention, the coefficient that the coefficient that will be multiplied by than the duty ratio in order to increase the pwm signal generated by microprocessor is larger is directly proportional to the electrical time constant of motor.
Accompanying drawing explanation
Shown in the drawings in order to reach the control card that object of the present invention realizes, in the accompanying drawings:
Fig. 1 is the schematic diagram of control card.
Fig. 2 is the curve chart being applied to electric current on motor and pwm signal in the prior art.
Fig. 3 is the curve chart being applied to electric current on motor and pwm signal in an embodiment according to the present invention.
The following reference numbers of element shown in the drawings:
1-control card
2-transducer
3-three-phase inverter
4-sensing cell
5-microprocessor.
Embodiment
Control card 1 for controlling brushless direct-current (BLDC) motor M comprises: AC-DC converter 2, and it is for converting AC network voltage/supply voltage to DC voltage; Three-phase inverter 3, the DC converting received from AC-DC converter is three-phase A by means of transistor by it, B, C electric current; Sensing cell 4, it utilizes Hall element or utilizes back electromotive force method of measurement to come detection rotor position and therefore detection speed; And, microprocessor 5, its utilize from sensing cell 4 receive signal and the transistor of actuating this three-phase inverter 3 provides speeds control to motor M.
Microprocessor 5 compares actual speed and the predetermined reference speed of motor M according to the data received from sensing cell 4, by generating the operation that PWM (pulse width modulation) signal with suitable duty ratio controls the transistor in three-phase inverter 3 by means of the PI be included in its software (proportional integral) algorithm; And, change the speed of motor M into reference velocity.
In an embodiment of the present invention, be applied to the electric current in motor M from a phase A in three-phase inverter 3, B, C are transformed into another phase AB, AC, BC, BA, in the commutation X duration of CA, CB, microprocessor 5 applies at least one generated thus pwm signal by increasing duty ratio.
Microprocessor 5 is greater than one coefficient (K>1) by being multiplied by calculates the duty ratio of the pwm signal generated thus within the commutation X duration.
Microprocessor 5 generates the pwm signal with suitable duty ratio by the actual speed and reference velocity comparing motor M during motor M operation, and the phase current triggered by pwm signal is adjusted to make motor M be the level of reference velocity and increase by the determined PWM duty ratio of PI control algolithm during commutation X, provide phase current to raise fast forwarding another phase time mutually to from one.Therefore, microprocessor 5 alleviates viewed current oscillation during commutation X, therefore reduces the moment vibration during motor M operation and therefore noise owing to reducing current oscillation.
The COEFFICIENT K that the duty ratio determining the pwm signal generated by the PI algorithm in the software by microprocessor 5 according to the number of poles in motor M, relation between switching frequency and the electrical time constant of motor M is taken advantage of.Such as, if the operating condition change of motor M, can be easy to make amendment to the software of microprocessor 5, only can change the value of k-factor, and reduce the noise of motor M by being adapted to different operating conditions.
In one embodiment of this invention, during commutation X, microprocessor 5 applies more than one consecutive PWM signal by increasing duty ratio.
In another embodiment of the invention, microcontroller 5 is by increasing duty ratio at the whole pwm signal applying during X to generate thus that commutates.
In another embodiment of the invention, microcontroller 5 applies one or more pwm signal by only increasing its duty ratio when the X that commutates starts, and has by the pwm signal of the determined duty ratio of PI control algolithm in all the other duration applying of commutation X.
In another embodiment of the invention, the duty ratio increased is utilized and the quantity of pwm signal that generated by microprocessor 5 is directly proportional to the switching frequency in three-phase inverter 3.For example, when switching frequency is 5 kHz wherein, if the quantity that its duty ratio is multiplied by the pwm signal of COEFFICIENT K is S1, so when switching frequency is 10KHz,, the quantity that its duty ratio is multiplied by the pwm signal of COEFFICIENT K becomes S2 (S2>S1).
In another embodiment of the invention, the COEFFICIENT K taken advantage of in order to the duty ratio increasing the pwm signal generated by microprocessor 5 is directly proportional to the electrical time constant L/R of motor M.In the motor M that electrical time constant L/R is larger, be difficult to be multiplied by the pwm signal of the coefficient between 1 and 2 along with such as duty ratio and increase electric current rapidly, therefore, by being multiplied by the COEFFICIENT K being such as greater than 2 and the duty ratio applying pwm signal.
In control card 1 of the present invention; by protecting known velocity feedback structure; low current vibration and therefore Low-torque vibration is realized during commutation X, and by means of the increase only made in the duty ratio of the pwm signal applied by microprocessor 5 to reduce the noise of motor M.Do not need extracurrent control element to reduce current oscillation.
Should be appreciated that the present invention is not subject to embodiment disclosed above restriction, and those skilled in the art can be easy to introduce different embodiments.These should be thought in the protection range required by claims of the present invention.
Claims (6)
1. one kind is applicable to the control card (1) controlling brshless DC motor (M), and comprising: transducer (2), AC voltage transitions is become DC voltage by it, three-phase inverter (3), the DC converting received from described transducer (2) is three-phase current by means of transistor by it, sensing cell (4), its detection rotor position, and, microprocessor (5), its transistor of being actuated described three-phase inverter (3) from the signal that described sensing cell (4) receives by utilization provides speeds control to described motor (M), the actual speed of its more described motor (M) and predetermined reference speed, and by generating by means of the PI algorithm be included in its software the operation that the pwm pulse bandwidth modulation signals with suitable duty ratio controls the transistor in described three-phase inverter (3), it is characterized in that, be applied to the commutation (X) of the electric current on described motor (M) from a phase transformation to other phase in described three-phase inverter (3) in the duration, described microprocessor (5) applies at least one generated thus pwm signal by increasing duty ratio,
Described microprocessor (5) calculates the duty ratio of the pwm signal generated thus by being multiplied by the coefficient (K) being greater than;
The quantity of the pwm signal generated thus by the duty ratio of increase pwm signal is directly proportional to the switching frequency in described three-phase inverter (3).
2. control card according to claim 1 (1), is characterized in that, described microprocessor (5) applies more than one consecutive PWM signal by increasing duty ratio in described commutation (X) period.
3. control card according to claim 1 and 2 (1), is characterized in that, the described pwm signal that described microprocessor (5) applies in whole commutation (X) period to generate thus by increasing described duty ratio.
4. control card according to claim 1 and 2 (1), is characterized in that, described microprocessor (5) applies one or more pwm signal by only increasing duty ratio when described commutation (X) starts.
5. control card according to claim 1 and 2 (1), it is characterized in that, the COEFFICIENT K taken advantage of in order to the duty ratio increasing the described pwm signal generated thus is directly proportional to the electrical time constant of described motor (M) (L/R).
6. a brshless DC motor (M), is characterized in that the control card (1) described in any one of aforementioned claim.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR200909436 | 2009-12-15 | ||
| TRA2009/09436 | 2009-12-15 | ||
| PCT/EP2010/069484 WO2011073127A1 (en) | 2009-12-15 | 2010-12-13 | Control card for the brushless direct current motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102714476A CN102714476A (en) | 2012-10-03 |
| CN102714476B true CN102714476B (en) | 2015-08-19 |
Family
ID=43501556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080057302.2A Expired - Fee Related CN102714476B (en) | 2009-12-15 | 2010-12-13 | For the control card of brshless DC motor |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2514090A1 (en) |
| CN (1) | CN102714476B (en) |
| WO (1) | WO2011073127A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767431B (en) * | 2015-04-02 | 2018-08-28 | 上海晶丰明源半导体股份有限公司 | A kind of control method, the device and system of the modulation of DC brushless motor pulse width |
| FR3055759B1 (en) * | 2016-09-02 | 2020-10-30 | Mmt ag | MECHATRONIC ASSEMBLY PILOT BY A PULSE WIDTH MODULATING SIGNAL |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1848663A (en) * | 2005-04-05 | 2006-10-18 | 国际整流器公司 | Brushless direct current motor drive circuit with modulation speed control |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3239532B2 (en) * | 1993-05-13 | 2001-12-17 | 株式会社日立製作所 | Motor drive |
| US6718125B2 (en) | 2000-09-26 | 2004-04-06 | Emerson Motor Co. | BLDC motor noise reduction using constant bus current control commutation |
| KR100457360B1 (en) * | 2002-06-22 | 2004-11-16 | 한국과학기술연구원 | Control system and method for reducing a commutation torque ripple of a brushless dc motor |
| JP2005094875A (en) * | 2003-09-16 | 2005-04-07 | Matsushita Electric Ind Co Ltd | Method and apparatus for driving brushless dc motor |
-
2010
- 2010-12-13 WO PCT/EP2010/069484 patent/WO2011073127A1/en active Application Filing
- 2010-12-13 CN CN201080057302.2A patent/CN102714476B/en not_active Expired - Fee Related
- 2010-12-13 EP EP10787149A patent/EP2514090A1/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1848663A (en) * | 2005-04-05 | 2006-10-18 | 国际整流器公司 | Brushless direct current motor drive circuit with modulation speed control |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011073127A1 (en) | 2011-06-23 |
| CN102714476A (en) | 2012-10-03 |
| EP2514090A1 (en) | 2012-10-24 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20181213 |