CN204046485U - Dust catcher and control circuit thereof - Google Patents
Dust catcher and control circuit thereof Download PDFInfo
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- CN204046485U CN204046485U CN201420476020.1U CN201420476020U CN204046485U CN 204046485 U CN204046485 U CN 204046485U CN 201420476020 U CN201420476020 U CN 201420476020U CN 204046485 U CN204046485 U CN 204046485U
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- motor
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- control module
- dust catcher
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Abstract
The utility model discloses a kind of dust catcher and control circuit thereof, wherein control circuit comprises power supply, voltage control module and motor, described motor can be direct current or alternating current machine, described voltage control module is arranged between power supply and motor, described electric power output voltage for be converted into motor input voltage after excess voltage control module, described voltage control module adjustable motor input voltage, maintains a constant value to keep the power of motor.In the control circuit of dust catcher, voltage control module is set, when stifled hour of dust catcher air inlet, load reduces, electric current is caused to reduce, now, the input voltage of voltage control module lifting motor, thus improve the rotating speed of motor, and then promote the vacuum degree of dust catcher, realize the power back-off of motor, make dust catcher still have powerful suction.
Description
Technical field
The utility model relates to a kind of dust catcher, particularly relates to a kind of dust catcher with control circuit.
Background technology
Traditional control circuit of dust collector adopts AC/DC series excited machine as load, and control unit generally adopts bidirectional triode thyristor (thyristor) to carry out speed governing by capacitance-resistance phase-shifting trigger or Single-chip Controlling phase-shift trigger circuit.Series excited machine electromotive force equilibrium equation is: U=k Ф N, wherein, k is constant, when dust catcher is at stifled suction inlet because load reduction makes electric current decline, the decline of electric current causes stator flux Ф to decline, and when U is constant in order to reach electric potential balancing, the rotating speed of motor raises, thus enhancing suction, the rotating speed that general dust catcher utilizes this feature of series excited machine to realize improving when dust catcher is at stifled suction inlet motor reaches the object improving complete machine vacuum degree.
Another kind method be, the power back-off that invariable power realizes alternating current machine is done by its electric current of electric circuit inspection and voltage, when dust catcher attachment is positioned over dust suction on carpet or floor, or after a long time use due to the dust accretions inside dirt bag or dirt cup get more and more the blocking caused in various degree time still keep dust catcher to have powerful suction.
For direct current permanent magnet motor (comprising brush direct current motor and DC brushless motor), because its stator or rotor are permanent magnets, electromotive force equilibrium equation is: U=Ce Ф N+Ia (Ra+Rc), when dust catcher is at stifled suction inlet because load reduction makes electric current I a decline, because Ra+Rc resistance is very little, in equation, the variable quantity of Ia (Ra+Rc) is also just very little; Because Ce is constant, main magnetic flux Ф does not change, and makes the rotating speed of motor raise seldom, thus cannot improve rotating speed, to ensure the vacuum degree of complete machine when U is constant.
Therefore, in view of above problem, be necessary the control circuit proposing a kind of new dust catcher, to ensure the operating efficiency of dust catcher.
Utility model content
Be to provide order of the present utility model a kind of can increase work efficiency dust catcher and the control circuit of dust catcher.
For realizing above-mentioned order ground, the utility model adopts following technical scheme: a kind of control circuit of motor, comprise power supply, voltage control module and motor, described voltage control module is arranged between power supply and motor, described electric power output voltage for be converted into motor input voltage after excess voltage control module, described voltage control module adjustable motor input voltage, maintains a constant value to keep the power of motor.
In a preferred embodiment, described motor input voltage is less than electric power output voltage.
In a preferred embodiment, described motor input voltage is the operating voltage of the pressure point of maximum efficiency of motor.
In a preferred embodiment, be provided with the acquisition module detecting current of electric between described motor and voltage control module, the curent change of motor is fed back to voltage control module by described acquisition module.
In a preferred embodiment, when current of electric declines, motor input voltage rises.
In a preferred embodiment, described power supply be battery, through conversion after DC power supply or household AC power.
In a preferred embodiment, described motor is direct current machine, and described voltage control module is PWM module.
In a preferred embodiment, described motor is alternating current machine, and described voltage control module is modulation circuit.
In a preferred embodiment, a kind of dust catcher, the control circuit of motor.
In a preferred embodiment, described control circuit increases the input voltage of motor, to improve the rotating speed of motor, thus ensures the vacuum degree of dust catcher.
Compared with prior art, the utility model has following beneficial effect: arrange voltage control module in the control circuit of dust catcher, to regulate the input voltage of the direct current machine of dust catcher, thus improve the rotating speed of direct current machine, and then promote the vacuum degree of dust catcher, realize the power back-off of direct current machine, make dust catcher still have powerful suction.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the theory diagram of the utility model control circuit execution mode.
Embodiment
The utility model is a kind of control circuit for dust catcher, and usually, dust catcher comprises motor and control circuit, and described motor can be direct current machine, also can be alternating current machine.
In theory, the balance of voltage equation of direct current machine is U=Ce Ф n+Ia (Ra+Rc), U in its Chinese style is supply voltage, Ce is electric machine structure constant, Ф is motor main flux, n is motor speed, Ia is armature of direct current motor electric current, Ra is armature resistance, Rc is commutator contact resistance (be 0 for DC brushless motor Rc), can illustrate that the voltage that power supply provides divide into two parts use according to balance of voltage equation, the i.e. part of Ce Ф n and the part of Ia (Ra+Rc), ratio wherein shared by Ce Ф n is much larger than Ia (Ra+Rc), described Ce Ф n part is for generating electric machine rotation, and Ia (Ra+Rc) part produces the voltage of necessary armature supply Ia for overcoming Ra+Rc.
For the dust catcher of direct current permanent magnet motor (comprising brush direct current motor and DC brushless motor) as power set, its power comes from direct current permanent magnet motor, its load is windage, when dust catcher is at stifled suction inlet, its windage reduces, power P declines, when voltage is constant, can be learnt by P=UI, electric current I declines, can find out that load reduction makes electric current I a decline by balance of voltage equation U=Ce Ф n+Ia (Ra+Rc), because Ia change is little and Ra+Rc resistance is very little before not reaching the limit of state, in equation, the variable quantity of Ia (Ra+Rc) is also just very little, because main magnetic flux Ф does not change, Ce is constant, and so, the rotating speed n of the motor when U is constant raises seldom, now cannot improve the vacuum degree that rotating speed n also just cannot improve complete machine, to improve the dust collection efficiency of dust catcher.
Consult shown in Fig. 1, in the utility model, between dust catcher power supply and direct current machine, arrange voltage control module, in the utility model, voltage control module is set to PWM module, and wherein, electric power output voltage is U
1, the direct current machine input voltage after PWM module process is U
2, electric power output voltage U
1needing to be greater than direct current machine input voltage is U
2, under namely motor operating voltage being remained on a voltage slightly low relative to power supply by PWM module, described U
2for the operating voltage of direct current machine pressure point of maximum efficiency, described power supply can be set to power brick or alternating current has been converted to galvanic power supply; When dust catcher attachment is positioned over dust suction on carpet or floor, or after a long time use due to the dust inside dirt bag or dirt cup get more and more the blocking caused in various degree time, due to motor input voltage U
2=Ce Ф n+Ia (Ra+Rc), the utility model dust catcher arranges acquisition module to gather current of electric I between motor and PWM module
mdata, use single-chip microcomputer for acquisition module in the utility model, work as I
mduring decline, due to power of motor P=U
2i
m, just can only improve motor input voltage U in order to improve rotating speed to improve complete machine vacuum degree
2, testing result is fed back to PWM module to promote U by single-chip microcomputer
2value, work as U
2during lifting, the value due to Ia (Ra+Rc) will be far smaller than the value of Ce Ф n, because Ce is electric machine structure constant and main magnetic flux Ф does not change, so motor speed n can get a promotion.Now the power P of motor can remain on a stable value, to ensure the operating efficiency of dust catcher.
Equally, when using alternating current machine, above-mentioned principle can be used equally to realize alternating current machine power back-off, only need voltage control module to be set to modulation circuit, the voltage control that can realize alternating current machine regulates.
The utility model arranges current of electric acquisition module in the control circuit of dust catcher, and increase electric moter voltage control module, when current of electric declines, improve the input voltage of the motor of dust catcher, thus improve the rotating speed of motor, and then promote the vacuum degree of dust catcher, realize the power back-off of motor, make dust catcher still have powerful suction.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. the control circuit of a motor, it is characterized in that: comprise power supply, voltage control module and motor, described voltage control module is arranged between power supply and motor, described electric power output voltage for be converted into motor input voltage after excess voltage control module, described voltage control module adjustable motor input voltage, maintains a constant value to keep the power of motor.
2. the control circuit of motor as claimed in claim 1, is characterized in that: described motor input voltage is less than electric power output voltage.
3. the control circuit of motor as claimed in claim 1, is characterized in that: described motor input voltage is the operating voltage of the pressure point of maximum efficiency of motor.
4. the control circuit of motor as claimed in claim 1, it is characterized in that: be provided with the acquisition module detecting current of electric between described motor and voltage control module, the curent change of motor is fed back to voltage control module by described acquisition module.
5. the control circuit of motor as claimed in claim 1, is characterized in that: when current of electric declines, and motor input voltage rises.
6. the control circuit of motor as claimed in claim 1, is characterized in that: described power supply is battery, DC power supply or household AC power after conversion.
7. the control circuit of motor as claimed in claim 1, it is characterized in that: described motor is direct current machine, described voltage control module is PWM module.
8. the control circuit of motor as claimed in claim 1, it is characterized in that: described motor is alternating current machine, described voltage control module is modulation circuit.
9. a dust catcher, is characterized in that: the control circuit with motor as described in claim 1.
10. dust catcher as claimed in claim 9, is characterized in that: described control circuit increases the input voltage of motor, to improve the rotating speed of motor, thus ensures the vacuum degree of dust catcher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420476020.1U CN204046485U (en) | 2014-08-22 | 2014-08-22 | Dust catcher and control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420476020.1U CN204046485U (en) | 2014-08-22 | 2014-08-22 | Dust catcher and control circuit thereof |
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| Publication Number | Publication Date |
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| CN204046485U true CN204046485U (en) | 2014-12-24 |
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| CN201420476020.1U Active CN204046485U (en) | 2014-08-22 | 2014-08-22 | Dust catcher and control circuit thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437910A (en) * | 2017-09-08 | 2017-12-05 | 广东威灵电机制造有限公司 | Dust catcher, motor and its constant-power control method, device |
| WO2019011233A1 (en) * | 2017-07-14 | 2019-01-17 | 天佑电器（苏州）有限公司 | Control system of vacuum cleaner motor, vacuum cleaner, and control method |
| US10182694B2 (en) | 2015-08-13 | 2019-01-22 | Lg Electronics Inc. | Vacuum cleaner |
| CN111657787A (en) * | 2019-03-08 | 2020-09-15 | 东芝生活电器株式会社 | Electric vacuum cleaner |
| CN112021985A (en) * | 2020-08-27 | 2020-12-04 | 追创科技(苏州)有限公司 | Handheld dust collector and control method |
-
2014
- 2014-08-22 CN CN201420476020.1U patent/CN204046485U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10182694B2 (en) | 2015-08-13 | 2019-01-22 | Lg Electronics Inc. | Vacuum cleaner |
| WO2019011233A1 (en) * | 2017-07-14 | 2019-01-17 | 天佑电器（苏州）有限公司 | Control system of vacuum cleaner motor, vacuum cleaner, and control method |
| CN107437910A (en) * | 2017-09-08 | 2017-12-05 | 广东威灵电机制造有限公司 | Dust catcher, motor and its constant-power control method, device |
| CN107437910B (en) * | 2017-09-08 | 2020-06-12 | 广东威灵电机制造有限公司 | Dust collector, motor and constant power control method and device of motor |
| CN111657787A (en) * | 2019-03-08 | 2020-09-15 | 东芝生活电器株式会社 | Electric vacuum cleaner |
| CN111657787B (en) * | 2019-03-08 | 2022-05-10 | 东芝生活电器株式会社 | Electric vacuum cleaner |
| CN112021985A (en) * | 2020-08-27 | 2020-12-04 | 追创科技(苏州)有限公司 | Handheld dust collector and control method |
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