CN209545474U - The start-up circuit and monopole asynchronous motor of monopole asynchronous motor - Google Patents
The start-up circuit and monopole asynchronous motor of monopole asynchronous motor Download PDFInfo
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- CN209545474U CN209545474U CN201920207784.3U CN201920207784U CN209545474U CN 209545474 U CN209545474 U CN 209545474U CN 201920207784 U CN201920207784 U CN 201920207784U CN 209545474 U CN209545474 U CN 209545474U
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Abstract
The utility model discloses a kind of start-up circuits of monopole asynchronous motor, including main winding, auxiliary winding, running capacitor and start unit, the start unit includes the start-up capacitance and centrifugal switch being serially connected, the start unit further includes the afterflow capacitor for being parallel to the centrifugal switch, wherein, the rated capacitance of the afterflow capacitor is much smaller than the rated capacitance of the running capacitor.The start-up circuit of monopole asynchronous motor provided by the utility model can extend the start-up capacitance of monopole asynchronous motor and the service life of centrifugal switch.The utility model additionally provides a kind of monopole asynchronous motor comprising above-mentioned start-up circuit, start-up course safety, long service life.
Description
Technical field
The utility model relates to motor field, a kind of particularly start-up circuit of monopole asynchronous motor and single-phase
Asynchronous motor.
Background technique
The starting-up later time of monopole asynchronous motor is as shown in Figure 1 comprising a start-up capacitance CSWith a running capacitor
CR, wherein start-up capacitance disconnects, running capacitor C after motor completes starting with the automatic disconnection of centrifugal switch KRFor tieing up
Hold the torque of motor operation.Wherein, due to start-up capacitance CSWork frequently, and its monopole asynchronous motor starting after with from
Heart switch K is disconnected automatically and then in off working state, is deposited in a large amount of charge thereon, if monopole asynchronous motor is from operating
It stops working after state, start-up capacitance CSOn charge to bleed off rapidly, in this way, start-up capacitance CSThere is a discharge process,
Damage its insulation division.It is put in addition, the contact centrifugal switch K can generate first breakdown air in closing course, between dynamic/static contact
Electricity, and then spark is generated, so that centrifugal switch K ' dynamic/static contact can generate different degrees of abrasion.
Utility model content
In order to overcome the defects of the prior art, the utility model embodiment provides a kind of opening for monopole asynchronous motor
Dynamic circuit, can extend the start-up capacitance of monopole asynchronous motor and the service life of centrifugal switch.
The embodiment of the present application discloses: a kind of start-up circuit of monopole asynchronous motor, including being capable of forming main field
Main winding, and it is in parallel with the main winding and be capable of forming the auxiliary winding of rotating excitation field corresponding with the main field, also wrap
It includes:
Running capacitor between the main winding and auxiliary winding is set；
The start unit being connected in parallel with the running capacitor, the start unit include the start-up capacitance that is serially connected and
Centrifugal switch, the start unit further include the afterflow capacitor for being parallel to the centrifugal switch, wherein the volume of the afterflow capacitor
Determine the rated capacitance that capacitance is much smaller than the running capacitor.
Further, the start-up circuit further includes the discharge resistance for being parallel to the start-up capacitance both ends.
Further, the afterflow capacitor is electric capacity of the dacron.
Further, the afterflow capacitor is monolithic capacitor.
Further, the capacitance of the afterflow capacitor is between 0.5 μ F between 1 μ F.
Further, the resistance value of the discharge resistance is between 150k Ω to 300k Ω.
Further, the ratio of the rated capacitance of the running capacitor and the afterflow capacitor is 50 or more.
The embodiment of the present application is disclosed that a kind of monopole asynchronous motor comprising above-mentioned start-up circuit and unidirectional friendship
The two poles of the earth in galvanic electricity source, the one-way communication power supply are connect with the both ends of the main winding respectively.
The beneficial effects of the utility model are as follows:
1, the start-up circuit of monopole asynchronous motor provided by the utility model can extend monopole asynchronous motor
The service life of start-up capacitance and centrifugal switch.
2, monopole asynchronous motor provided by the utility model, including above-mentioned start-up circuit, start-up course safety is used
Service life is long.
For the above and other objects, features and advantages of the utility model can be clearer and more comprehensible, preferable reality is cited below particularly
Example is applied, and cooperates institute's accompanying drawings, is described in detail below.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the start-up circuit diagram of monopole asynchronous motor in the prior art；
Fig. 2 is the start-up circuit diagram of the monopole asynchronous motor in the utility model embodiment；
Fig. 3 is the start-up circuit diagram of the preferred monopole asynchronous motor in the utility model embodiment；
The appended drawing reference of the figures above:
M, main winding；A, auxiliary winding；CR, running capacitor；CS, start-up capacitance；CF, afterflow capacitor；K, centrifugal switch；R, it puts
Resistance.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The start-up circuit for please referring to a kind of monopole asynchronous motor shown in Fig. 2, including be capable of forming the master of main field around
Group M, and auxiliary winding A that is in parallel with the main winding M and being capable of forming rotating excitation field corresponding with the main field, it is described to open
Dynamic circuit further include:
Running capacitor C between the main winding M and auxiliary winding A is setR；
With the running capacitor CRThe start unit being connected in parallel, the start unit include concatenated start-up capacitance CSWith
Centrifugal switch K, the start unit further include the afterflow capacitor C for being parallel to the centrifugal switch KF, wherein the afterflow capacitor
CFRated capacitance be much smaller than the running capacitor CRRated capacitance.
Above-mentioned start-up circuit, to one lesser afterflow capacitor C of both ends parallel connection of centrifugal switch KF, motor is by stopping shape
State into start-up course, the revolving speed of rotor level off to rated value when, centrifugal switch can disconnect automatically, disconnect moment,
Since capacitor voltage at both ends cannot be mutated (still in the state of short circuit), start-up capacitance CSThe starting current in circuit passes through afterflow electricity
Hold CFCircuit is formed, and does not have to the loop current of the contact disjunction auxiliary winding A of centrifugal switch K.In motor from operating status to stopping
During only, due to the both ends of centrifugal switch K lesser afterflow capacitor C in parallelF, the energy storage of capacitor can pass through Q=(C*
u2)/2 calculate.(wherein: Q is the energy storage of capacitor, C is the capacitance of capacitor, the voltage that u is capacitor both ends) in turn, by
In afterflow capacitor CFMuch smaller than running capacitor CR, when centrifugal switch K is reclosed, contact only needs to discharge much smaller than existing side
(calculated result ratio is about 1/C to the energy of formulaR), i.e., its substantially no longer generate spark discharge, and its discharge current also only
Having the energy of about existing way, (calculated result ratio is about 1/CR), to extend start-up capacitance CSWith the use of centrifugal switch K
Service life.
In one preferred embodiment, the start-up circuit further includes being parallel to the start-up capacitance CSIt puts at both ends
Resistance R.It can refer to Fig. 3, by halted state into start-up course, start-up capacitance CSUpper a large amount of charge can also pass through parallel connection
In the start-up capacitance CSThe discharge resistance R at both ends assists release, to reduce start-up capacitance CSThe impact of discharge current, together
When centrifugal switch K is reclosed, the contact of centrifugal switch K will not generate spark discharge again, further ensure starting electricity
Hold CSWith the service life of centrifugal switch K.
Wherein, the afterflow capacitor CFIt can be electric capacity of the dacron or monolithic capacitor.Of course, in other optional embodiment party
In formula, the afterflow capacitor CFThe capacitor of work purpose can also be easily achieved for other.
Wherein, the afterflow capacitor CFCapacitance can be between 0.5 μ F between 1 μ F.Preferably, the running capacitor
Rated capacitance and the afterflow capacitor ratio 50 or more.For example, in an optional embodiment, it is described single-phase
The rated power of asynchronous motor can be 1.5kW, start-up capacitance CSFor 200 μ F, operation capacitor is 50 μ F, afterflow capacitor CFIt is 1
μF。
In addition, the resistance value of the discharge resistance R can be between 150K Ω to 300K Ω.
The present embodiment is disclosed that a kind of monopole asynchronous motor comprising above-mentioned start-up circuit and one-way communication electricity
Source, the two poles of the earth of the one-way communication power supply are connect with the both ends of the main winding M respectively.Its start-up course safety, service life
It is long.
Specific embodiment is applied in the utility model to be expounded the principles of the present invention and embodiment, with
The explanation of upper embodiment is merely used to help understand the technical solution of the utility model and its core concept；Meanwhile for ability
The those skilled in the art in domain have change based on the idea of the present invention in specific embodiments and applications
Place, in conclusion the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. a kind of start-up circuit of monopole asynchronous motor, the main winding including being capable of forming main field, and with the master around
Group is in parallel and is capable of forming the auxiliary winding of rotating excitation field corresponding with the main field, which is characterized in that further include:
Running capacitor between the main winding and auxiliary winding is set；
The start unit being connected in parallel with the running capacitor, the start unit include the start-up capacitance being serially connected and centrifugation
Switch, the start unit further includes the afterflow capacitor for being parallel to the centrifugal switch, wherein the specified electricity of the afterflow capacitor
Capacity is much smaller than the rated capacitance of the running capacitor.
2. the start-up circuit of monopole asynchronous motor according to claim 1, which is characterized in that the start-up circuit also wraps
Include the discharge resistance for being parallel to the start-up capacitance both ends.
3. the start-up circuit of monopole asynchronous motor according to claim 1, which is characterized in that the afterflow capacitor is to wash
Synthetic fibre capacitor.
4. the start-up circuit of monopole asynchronous motor according to claim 1, which is characterized in that the afterflow capacitor is only
Stone capacitor.
5. the start-up circuit of monopole asynchronous motor according to claim 1, which is characterized in that the electricity of the afterflow capacitor
Capacity is between 0.5 μ F between 1 μ F.
6. the start-up circuit of monopole asynchronous motor according to claim 2, which is characterized in that the resistance of the discharge resistance
Value is between 150k Ω to 300k Ω.
7. the start-up circuit of monopole asynchronous motor according to claim 1, which is characterized in that the volume of the running capacitor
The ratio of capacitance and the afterflow capacitor is determined 50 or more.
8. a kind of monopole asynchronous motor, which is characterized in that including start-up circuit as claimed in any one of claims 1 to 7
It is connect respectively with the both ends of the main winding with the two poles of the earth of one-way communication power supply, the one-way communication power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920207784.3U CN209545474U (en) | 2019-02-19 | 2019-02-19 | The start-up circuit and monopole asynchronous motor of monopole asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920207784.3U CN209545474U (en) | 2019-02-19 | 2019-02-19 | The start-up circuit and monopole asynchronous motor of monopole asynchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209545474U true CN209545474U (en) | 2019-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920207784.3U Active CN209545474U (en) | 2019-02-19 | 2019-02-19 | The start-up circuit and monopole asynchronous motor of monopole asynchronous motor |
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| Country | Link |
|---|---|
| CN (1) | CN209545474U (en) |
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2019
- 2019-02-19 CN CN201920207784.3U patent/CN209545474U/en active Active
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