CN105490595A - Method and equipment for identifying direct current motor rotor phase, and domestic appliance - Google Patents
Method and equipment for identifying direct current motor rotor phase, and domestic appliance Download PDFInfo
- Publication number
- CN105490595A CN105490595A CN201511033639.0A CN201511033639A CN105490595A CN 105490595 A CN105490595 A CN 105490595A CN 201511033639 A CN201511033639 A CN 201511033639A CN 105490595 A CN105490595 A CN 105490595A
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- phase
- resistance
- rotor phase
- identification
- direct current
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Classifications
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to the field of domestic appliances, and discloses a method and equipment for identifying a direct current motor rotor phase, and domestic appliance. The direct current motor rotor phase can be identified quickly in a starting moment of a fan, and the operating direction of the fan can be rapidly adjusted. The method for identifying the direct current motor rotor phase comprises the steps of detecting reverse electromotive force Ua, Ub and Uc of three-phase windings of the direct current motor; and comparing the Ua, Ub and Uc to identify the direct current motor rotor phase.
Description
Technical field
The present invention relates to field of household appliances, particularly, relating to a kind of method, equipment and household electrical appliance for identifying DC motor rotor phase place.
Background technology
Along with the development of technology, direct current machine is widely used in fan product, but in the fan of existing employing direct current machine, what substantially adopt is all the direct current machine with Hall element.The structural representation of the electric system that Fig. 1 adopts for this fan.This electric system comprises DC power supply 10, control device 20, direct current machine 30 and Hall element 40, the position signalling of DC motor rotor responded to by the control device 20 of this fan by Hall element 40, thus controls the startup of fan, stopping, braking, rotating according to this position signalling.But the direct current machine cost being equipped with Hall element is higher, and Hall element needs to embed motor internal, not easily assembles, and motor housing volume is large simultaneously.
In addition, also there is the fan not adopting the direct current machine with Hall element at present, the structure of its electric system can be as shown in Figure 2.For such fan, after each starting fan all needs to wait for that motor rotation reaches certain speed, control device 20 could identify the phase place of DC motor rotor, rotates forward after the certain angle that causes reversing during starting fan again, and reverse angle is not of uniform size causes.
Summary of the invention
The object of this invention is to provide a kind of method, equipment and household electrical appliance for identifying DC motor rotor phase place, it can identify the phase place of DC motor rotor and the rotation direction of energy rapid adjustment fan fast in starting fan moment.
To achieve these goals, the invention provides a kind of method for identifying DC motor rotor phase place, the method comprises: inverse electromotive force Ua, Ub, Uc of detecting described direct current machine three-phase windings; And more described Ua, Ub, Uc, to identify the phase place of described DC motor rotor.
Wherein, described Ua, Ub, Uc are to identify that the phase place of described DC motor rotor comprises: when Ua>Uc>Ub, identification rotor phase is 0-60 °; When Ua>Ub>Uc, identification rotor phase is 60-120 °; When Ub>Ua>Uc, identification rotor phase is 120-180 °; When Ub>Uc>Ua, identification rotor phase is 180-240 °; When Uc>Ub>Ua, identification rotor phase is 240-300 °; And when Uc>Ua>Ub, identification rotor phase is 300-360 °.
Correspondingly, the present invention also provides a kind of equipment for identifying DC motor rotor phase place, and this equipment comprises: voltage check device, for detecting inverse electromotive force Ua, Ub, Uc of described direct current machine three-phase windings; And phase identification device, for more described Ua, Ub, Uc, to identify the phase place of described DC motor rotor.
Wherein, described phase identification device is used for: when Ua>Uc>Ub, and identification rotor phase is 0-60 °; When Ua>Ub>Uc, identification rotor phase is 60-120 °; When Ub>Ua>Uc, identification rotor phase is 120-180 °; When Ub>Uc>Ua, identification rotor phase is 180-240 °; When Uc>Ub>Ua, identification rotor phase is 240-300 °; And when Uc>Ua>Ub, identification rotor phase is 300-360 °.
Wherein, described voltage check device comprises three voltage check devices being respectively used to detect described inverse electromotive force Ua, Ub, Uc.
Wherein, one in described three voltage check devices comprises: resistance R1, resistance R2 and resistance R3, wherein be in series series circuit one end of forming of resistance R1 and resistance R2 is connected a phase winding of described direct current machine, other end ground connection, described resistance R3 one end is connected between resistance R1 and resistance R2, the other end as output to calculate the inverse electromotive force Ua of this phase winding.
Wherein, Ua=[(R1+R2)/R2] * Uar, wherein, Uar is the voltage of described output, R1 and R2 is respectively the resistance of described resistance R1 and resistance R2.
Wherein, the one in these three voltage check devices also comprises: diode ZD1 and electric capacity C1, this diode ZD1 and electric capacity C1 are connected to described resistance R3 two ends respectively, and the other end is ground connection respectively.
Correspondingly, the present invention also provides a kind of household electrical appliance, and these household electrical appliance comprise: direct current machine; The above-mentioned equipment for identifying DC motor rotor phase place; And control device, for according to described for identifying the DC motor rotor phase place that the equipment of DC motor rotor phase place identifies, control the rotation of described direct current machine.
Wherein, these household electrical appliance can be fan.
By technique scheme, without the need to by hall device, the phase place of DC motor rotor can be identified fast and the rotation direction of energy rapid adjustment fan in starting fan moment.Three-phase inverse electromotive force testing circuit structure of the present invention is simple, convenient, cost is low.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation of existing electric system;
Fig. 2 is the structural representation of another execution mode of existing electric system;
Fig. 3 is the structural representation of the electric system arranged in household electrical appliance provided by the invention;
Fig. 4 shows the circuit diagram of motor-drive circuit and voltage check device; And
The relation schematic diagram of phase place residing for inverse electromotive force Ua, Ub, Uc that Fig. 5 is direct current machine three-phase windings and rotor.
Description of reference numerals
10 DC power supply 20 control device
30 direct current machine 40 Hall elements
Equipment 110 voltage check device of 100 identification DC motor rotor phase places
120 phase identification device ZD1 ~ ZD3 diodes
R1 ~ R9 resistance 200 DC motor driver
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 3 is the structural representation of the electric system arranged in household electrical appliance provided by the invention.As shown in Figure 3, present invention also offers household electrical appliance (such as, fan) in the electric system that arranges, this system comprises: DC power supply 10, direct current machine 30, for identifying the equipment 100 of DC motor rotor phase place and controlling the control device 20 of described direct current machine rotation direction according to identified rotor phase.First this control device 20 can utilize described DC power supply 10 to power to described direct current machine 30, to start described direct current machine 30; Utilize the equipment 100 of described identification DC motor rotor phase place to identify described DC motor rotor phase place afterwards, and control the rotation direction of described direct current machine 10 according to this phase place.The program, without the need to by hall device, can identify the phase place of DC motor rotor and the rotation direction of energy rapid adjustment fan in starting fan moment fast.
Wherein, described for identifying that the equipment 100 of DC motor rotor phase place can comprise: voltage check device 110, for detecting inverse electromotive force Ua, Ub, Uc of described direct current machine three-phase windings; And phase identification device 120, for more described Ua, Ub, Uc, to identify the phase place of described DC motor rotor.
Specifically, described phase identification device 120 can when Ua>Uc>Ub, and identification rotor phase is 0-60 °; When Ua>Ub>Uc, identification rotor phase is 60-120 °; When Ub>Ua>Uc, identification rotor phase is 120-180 °; When Ub>Uc>Ua, identification rotor phase is 180-240 °; When Uc>Ub>Ua, identification rotor phase is 240-300 °; And when Uc>Ua>Ub, identification rotor phase is 300-360 °.
Fig. 4 shows the circuit diagram of motor-drive circuit and voltage check device.As shown in Figure 4, DC motor driver 200 can export three-phase current to direct current machine 30 according to the pwm signal of control device 20, operates to drive this direct current machine 30.The invention provides respectively for the three-phase windings of direct current machine 30, have employed three voltage check devices to detect inverse electromotive force Ua, Ub, Uc of this three-phase windings.The circuit structure of these three voltage check devices can as shown in Figure 4, and motor equals to be exactly a generator, and inverse electromotive force is exactly generator three-phase electromotive force.For the object of simplified illustration, voltage check device only for detection inverse electromotive force Ua is that example is described, the circuit structure of the voltage check device of inverse electromotive force Ub, Uc of other two-phases and the voltage check device of inverse electromotive force Ua is similar, repeats no more in this.
Wherein, the described voltage check device for detecting inverse electromotive force Ua comprises: resistance R1, resistance R2 and resistance R3, wherein be in series series circuit one end of forming of resistance R1 and resistance R2 is connected a phase winding of described direct current machine, other end ground connection, described resistance R3 one end is connected between resistance R1 and resistance R2, the other end as output to calculate the inverse electromotive force Ua of this phase winding.In the circuit, voltage U a, through resistance R1 and resistance R2 dividing potential drop, meets following formula:
Uar＝[R2/(R1+R2)]*Ua(1)
Wherein, Uar is the voltage of described output, R1 and R2 is respectively the resistance of described resistance R1 and resistance R2.
Afterwards, voltage U a is gone out by following formulae discovery:
Ua＝[(R1+R2)/R2]*Uar(2)
Similar, inverse electromotive force Ub and Uc of two-phase also can have similar voltage check device detection to obtain in addition.It should be noted that, phase identification device of the present invention and control device can be implemented as a control chip (such as, single-chip microcomputer), such as, voltage U ar in Fig. 4 directly can be input to the AD mouth of this control chip, calculates inverse electromotive force Ua by this control chip according to this voltage U ar and above-mentioned formula (2).
Preferably, the described voltage check device for detecting inverse electromotive force Ua also comprises: diode ZD1 and electric capacity C1, this diode ZD1 and electric capacity C1 are connected to described resistance R3 two ends respectively, and the other end is ground connection respectively.By this, the output voltage Uar that can maintain described output stablizes.
Rotor phase and the relation between inverse electromotive force Ua, Ub, Uc can be as shown in the table:
| Rotor phase | Three-phase inverse electromotive force |
| 0-60° | Ua>Uc>Ub |
| 60-120° | Ua>Ub>Uc |
| 120-180° | Ub>Ua>Uc |
| 180-240° | Ub>Uc>Ua 3 --> |
| 240-300° | Uc>Ub>Ua |
| 300-360° | Uc>Ua>Ub |
In addition, Fig. 5 also shows the relation schematic diagram of phase place residing for inverse electromotive force Ua, Ub, Uc of direct current machine three-phase windings and rotor.Phase identification device can judge the concrete phase place of DC motor rotor according to Ua, Ub, Uc electromotive force size detected in conjunction with above-mentioned table or Fig. 5.
Correspondingly, present invention also offers a kind of method for identifying DC motor rotor phase place, the method comprises: inverse electromotive force Ua, Ub, Uc of detecting described direct current machine three-phase windings; And more described Ua, Ub, Uc, to identify the phase place of described DC motor rotor.About detail and the benefit of the method, the above-mentioned description for the equipment for identifying DC motor rotor phase place can being consulted, repeating no more in this.
By technique scheme of the present invention, without the need to by hall device, the phase place of DC motor rotor can be identified fast and the rotation direction of energy rapid adjustment fan in starting fan moment.Three-phase inverse electromotive force testing circuit structure of the present invention is simple, convenient, cost is low.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different execution mode of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1., for identifying a method for DC motor rotor phase place, the method comprises:
Detect inverse electromotive force Ua, Ub, Uc of described direct current machine three-phase windings; And
More described Ua, Ub, Uc, to identify the phase place of described DC motor rotor.
2. method according to claim 1, is characterized in that, described Ua, Ub, Uc are to identify that the phase place of described DC motor rotor comprises:
When Ua>Uc>Ub, identification rotor phase is 0-60 °;
When Ua>Ub>Uc, identification rotor phase is 60-120 °;
When Ub>Ua>Uc, identification rotor phase is 120-180 °;
When Ub>Uc>Ua, identification rotor phase is 180-240 °;
When Uc>Ub>Ua, identification rotor phase is 240-300 °; And
When Uc>Ua>Ub, identification rotor phase is 300-360 °.
3. for identifying an equipment for DC motor rotor phase place, it is characterized in that, this equipment comprises:
Voltage check device, for detecting inverse electromotive force Ua, Ub, Uc of described direct current machine three-phase windings; And
Phase identification device, for more described Ua, Ub, Uc, to identify the phase place of described DC motor rotor.
4. equipment according to claim 3, is characterized in that, described phase identification device is used for:
When Ua>Uc>Ub, identification rotor phase is 0-60 °;
When Ua>Ub>Uc, identification rotor phase is 60-120 °;
When Ub>Ua>Uc, identification rotor phase is 120-180 °;
When Ub>Uc>Ua, identification rotor phase is 180-240 °;
When Uc>Ub>Ua, identification rotor phase is 240-300 °; And
When Uc>Ua>Ub, identification rotor phase is 300-360 °.
5. equipment according to claim 3, is characterized in that, described voltage check device comprises three voltage check devices being respectively used to detect described inverse electromotive force Ua, Ub, Uc.
6. equipment according to claim 5, it is characterized in that, one in described three voltage check devices comprises: resistance R1, resistance R2 and resistance R3, wherein be in series series circuit one end of forming of resistance R1 and resistance R2 is connected a phase winding of described direct current machine, other end ground connection, described resistance R3 one end is connected between resistance R1 and resistance R2, the other end as output to calculate the inverse electromotive force Ua of this phase winding.
7. equipment according to claim 6, is characterized in that,
Ua＝[(R1+R2)/R2]*Uar，
Wherein, Uar is the voltage of described output, R1 and R2 is respectively the resistance of described resistance R1 and resistance R2.
8. equipment according to claim 6, is characterized in that, the one in these three voltage check devices also comprises: diode ZD1 and electric capacity C1, this diode ZD1 and electric capacity C1 are connected to described resistance R3 two ends respectively, and the other end is ground connection respectively.
9. household electrical appliance, is characterized in that, these household electrical appliance comprise:
Direct current machine;
The equipment for identifying DC motor rotor phase place any one of claim 3-8 described in claim; And
Control device, for according to described for identifying the DC motor rotor phase place that the equipment of DC motor rotor phase place identifies, control the rotation of described direct current machine.
10. household electrical appliance according to claim 9, is characterized in that, these household electrical appliance are fan.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511033639.0A CN105490595A (en) | 2015-12-31 | 2015-12-31 | Method and equipment for identifying direct current motor rotor phase, and domestic appliance |
| PCT/CN2016/111047 WO2017114229A1 (en) | 2015-12-31 | 2016-12-20 | Method and device for identifying phase of rotor of dc motor, and household electrical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511033639.0A CN105490595A (en) | 2015-12-31 | 2015-12-31 | Method and equipment for identifying direct current motor rotor phase, and domestic appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105490595A true CN105490595A (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511033639.0A Pending CN105490595A (en) | 2015-12-31 | 2015-12-31 | Method and equipment for identifying direct current motor rotor phase, and domestic appliance |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105490595A (en) |
| WO (1) | WO2017114229A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017114229A1 (en) * | 2015-12-31 | 2017-07-06 | 广东美的环境电器制造有限公司 | Method and device for identifying phase of rotor of dc motor, and household electrical device |
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| CN101262196A (en) * | 2008-04-29 | 2008-09-10 | 重庆大学 | Method for detecting DC motor rotor location of no location sensor brushless |
| CN103633904A (en) * | 2013-12-09 | 2014-03-12 | 国网上海市电力公司 | Control method and control system for sensorless brushless direct-current motor |
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| 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 (en) * | 2015-12-31 | 2016-04-13 | 广东美的环境电器制造有限公司 | Method and equipment for identifying direct current motor rotor phase, and domestic appliance |
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2015
- 2015-12-31 CN CN201511033639.0A patent/CN105490595A/en active Pending
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2016
- 2016-12-20 WO PCT/CN2016/111047 patent/WO2017114229A1/en active Application Filing
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| CN101262196A (en) * | 2008-04-29 | 2008-09-10 | 重庆大学 | Method for detecting DC motor rotor location of no location sensor brushless |
| CN103633904A (en) * | 2013-12-09 | 2014-03-12 | 国网上海市电力公司 | Control method and control system for sensorless brushless direct-current motor |
| CN104779850A (en) * | 2015-03-19 | 2015-07-15 | 四川长虹电器股份有限公司 | Back electromotive force detection circuit |
Non-Patent Citations (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017114229A1 (en) * | 2015-12-31 | 2017-07-06 | 广东美的环境电器制造有限公司 | Method and device for identifying phase of rotor of dc motor, and household electrical device |
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| Publication number | Publication date |
|---|---|
| WO2017114229A1 (en) | 2017-07-06 |
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Application publication date: 20160413 |