CN104052199A - System And Method For Protection Of A Compressor With An Aluminum Winding Motor - Google Patents
System And Method For Protection Of A Compressor With An Aluminum Winding Motor Download PDFInfo
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- CN104052199A CN104052199A CN201410096448.8A CN201410096448A CN104052199A CN 104052199 A CN104052199 A CN 104052199A CN 201410096448 A CN201410096448 A CN 201410096448A CN 104052199 A CN104052199 A CN 104052199A
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Abstract
A compressor is provided and includes a single-phase electric motor and a protector device. The electric motor drives a compression mechanism and has a rotor and a stator. The stator is comprised of aluminum windings. The protector device is attached to the stator and is configured to disconnect the electric motor from a power supply when an input voltage of the power supply to the electric motor is less than a threshold voltage value set at a level between a minimum run voltage and an overheat voltage of the compressor. The overheat voltage corresponds to an overheat temperature of the electric motor. The threshold voltage value is set at a level that is between the minimum run voltage and the overheat voltage. The protector device includes a tolerance level such that the threshold voltage minus the tolerance level is greater than the overheat voltage and the threshold voltage plus the tolerance level is less than the minimum run voltage.
Description
The cross reference of related application
The application requires the U.S. Provisional Application No.61/791 submitting on March 15th, 2013,330 rights and interests.Whole disclosures of this application are combined in herein by reference.
Technical field
Present disclosure relates to air compressor motor, and relates more specifically to for the protection of the system and method for compressor with aluminium winding motor.
Background technology
This part provides the background information that relates to present disclosure, and it is prior art not necessarily.
Refrigeration and air-conditioning system generally comprise compressor, condenser, expansion valve or its equality unit and evaporator.These parts order couplings are to limit continuous flow channel.Cold-producing medium flow through system and between liquid phase and vapour phase or gas phase alternately.The multiple type of compressor using in refrigerating system includes, but are not limited to scroll compressor, reciprocating compressor, screw compressor and rotary compressor, for example vane compressor.
In scroll compressor, motor drives in turbine component via the suitable driving shaft that is fixed to motor rotor.Traditionally, Compressor Manufacturing business uses copper winding in motor.Recently, the manufacturer of scroll compressor has forwarded the motor of the combination with copper winding and some aluminium windings to.But aluminium winding has the resistivity higher than copper.Therefore, use aluminium winding to replace too much copper winding will cause the decline of the efficiency of motor.
Summary of the invention
This part provides the General Introduction of disclosure, and this part is not four corner or whole feature that will disclose all sidedly disclosure.
Provide a kind of compressor, this compressor comprises single-phase motor and protector.Motor driven compressing mechanism and there is rotor and stator.Stator comprises aluminium winding.Protector is attached to stator and is configured in the time that the input voltage to motor of power supply is less than the threshold voltage value that is arranged on the level place between the minimum operating voltages of compressor and the mistake thermal voltage of compressor, and motor and power supply are disconnected.Cross thermal voltage corresponding with the overtemperature of motor.Threshold voltage value is arranged on minimum operating voltages and crosses the level place between thermal voltage.Protector comprises that nargin level is to make threshold voltage deduct that nargin level was greater than thermal voltage and threshold voltage adds that nargin level is less than minimum operating voltages.
The other field of application will become obvious according to description provided herein.Description in this general introduction and concrete example are intended to be not intended for explanation to limit the scope of the disclosure.
Brief description of the drawings
To more fully understand present disclosure according to detailed description and accompanying drawing, wherein:
Fig. 1 is the compressor according to present disclosure;
Fig. 2 is the stator module according to present disclosure;
Fig. 3 shows the curve chart of voltage and temperature;
Fig. 4 is according to the flow chart of the method for present disclosure;
Fig. 5 is according to the flow chart of the method for present disclosure; And
Fig. 6 is the compressor according to present disclosure.
Run through some views of accompanying drawing, corresponding label represents corresponding part.
Embodiment
Referring now to accompanying drawing, example embodiment is described in more detail.
With reference to figure 1, scroll compressor 10 comprises cylindrical housings 12 and single-phase motor 40, and single-phase motor 40 is configured to carry out drive track scroll element 52 with driving shaft 30.Motor 40 can be for example monocyclic-start induction motor.Or motor can be synchronous motor.In addition, motor 40 can be multiphase motor, for example threephase motor.
Motor 40 comprises stator module 42, is wound around the winding 44 of stator module 42 and is coupled to the rotor 43 of driving shaft 30.Particularly, by making wire form winding 44 about the tooth lopping in stator module 42.
As described in this article, comprise aluminium for the wire of winding 44.In addition, as used herein, aluminium is appreciated that and also comprises and be used as wire to form the suitable aluminium alloy of motor winding 44.
With reference to figure 2, stator module 42 comprises the stator core 90 that comprises stacking lamination 92.
Again for example, in the common following U.S. Patent application of transferring the possession of, describe and there is the scroll compressor with the monocyclic-start induction motor of aluminium winding: the U.S. Patent application No.61/731 of " the Scroll Compressor Having a Single Phase Induction Motor with Aluminum Windings " by name submitting on November 30th, 2012,618, and submission on March 15th, 2013 has identical title and requires U.S. Patent application No.61/731, the U.S. Patent application No.13/835 of 618 priority, 087.Whole disclosures of above-mentioned application are incorporated herein by reference.
Refer again to Fig. 1, input voltage is sent to compressor 10 and motor 40 via power line 102.
Control module 100 can be attached to the compressor housing 12 of compressor 10.Power line 102 can extend through protection module 100 input voltage is sent to the motor 40 of compressor housing 12 inside.
Control module 100 can comprise that supervision is sent to the voltage sensor 110 of the input voltage of compressor 10 and motor 40 via power line 102.As described below, voltage sensor 110 can be for test purpose to determine certain voltage characteristic and the parameter of motor 40.
In addition, as shown in Figure 1, compressor 10 can comprise the temperature sensor 120 of the temperature of monitoring motor winding 44.As described below, temperature sensor 120 can be for test purpose to determine certain temperature characterisitic and the parameter of motor 40.
After test, and as further described below, can be in the situation that there is no voltage sensor 110 and temperature sensor 120 operate compressor 10.For example, the compressor 10 that there is no voltage sensor 110 and temperature sensor 120 has been shown in Fig. 6.As described below, the compressor shown in Fig. 6 comprises motor protector 200, and this is also shown in Figure 2.
Along with the input voltage that is input to motor reduces, the temperature of motor is tending towards raising.This relation has been shown in Fig. 3.As shown, for higher voltage, motor temperature is relatively low, and for lower voltage, motor temperature is relatively high.
In addition, as compared with using the similar motor of copper winding, in the situation that every other operating condition is identical substantially, for given voltage drop, use the motor of aluminium winding conventionally will in temperature, there is higher corresponding increase than the similar motor that uses copper winding.
For the change in voltage of the input electric power transmitting in given installation environment, motor is configured to have minimum or the low-voltage (" LV ") of appointment conventionally, is called as " necessary working voltage " or " minimum operating voltages ".For example, may require motor under the LV specifying, to work for the specification of the motor of given manufacture in order to meet specification.With reference to figure 3, show LV.In addition, LV value can be the predetermined percentage of the rated voltage of motor 40, for example 90%.For example, the motor that is 200V for rated voltage, corresponding LV value can be 180V.In other words, in most of the cases, LV can be with 10% lower than motor rated voltage.But, can use other predetermined percentage.
For example, form below comprises rated voltage and " must move " or the LV voltage of the example compressor motor different for three, is included in the value for 60Hz and two versions of 50Hz in applicable situation:
In addition, in order to prevent from damaging motor 40, can arrange or definite maximum temperature threshold (" Max.Temp. ") for motor 40.Max.Temp. is determined in the isolation of motor 40 that for example, can be based in compressor 10.In other words, Max.Temp. can depend on characteristic and the ability of shielding system, and shielding system comprises used specific paint, the specific nylon wire using etc.For example, can be in 280 degrees Fahrenheits within the scope of 320 degrees Fahrenheits for the Max.Temp. that is arranged on the motor 40 in given compressor.
In order to prevent from damaging compressor 10 and air compressor motor 40, the working temperature of motor 40 can remain on the level place lower than Max.Temp..In other words, can implement for example motor protector 200 of protective device and stopped the work of motor before the temperature of motor reaches Max.Temp..
Because the relation between temperature and voltage, and due to the particular characteristics of compressor, test can be for determining the specific voltage corresponding with Max.Temp. or approximate voltage range.Particularly, the voltage corresponding with Max.Temp. level can be called " crossing thermal voltage " (" OV ").With reference to figure 3, show OV.Difference between LV and OV is called Δ V.In the situation that every other condition of work is identical substantially, for the motor with aluminium winding, Δ V is much smaller than the Δ V of similar motor for having copper winding.
Continue to have 200V rated operational voltage, 180V LV and in 280 degrees Fahrenheits the example to the motor 40 of the Max.Temp. within the scope of 320 degrees Fahrenheits,, can be approximately 170V to 172V for the corresponding OV of this motor 40.
With reference to figure 4, show for determining that the method 400 of OV voltage level and method 400 are in 402 beginnings.
In 404, select the initialization voltage for motor 40.Initialization voltage can be the normal voltage in the operating voltage range of motor 40.For example, initialization voltage can be corresponding with rated operational voltage.Continue example above, initialization voltage can be 200V.
In 406, use for example temperature sensor 120 to carry out the temperature of monitoring motor.In 408, the motor temperature of sensing and Max.Temp. are compared.In the time that the motor temperature of sensing is not more than Max.Temp., method proceeds to 410.
In 410, method determines whether motor temperature has reached stable state.For example, in the time that motor temperature rests on specified temp or approaches specified temp within the specific period, motor temperature reaches stable state.In 410, after motor temperature reaches stable state, method loops back 406 and continue monitoring motor temperature.
In 410, when motor temperature has reached after stable temperature, method proceeds to 412.In 412, method reduces input voltage and proceeds to 406 with monitoring motor temperature again.
Method carry out by this way until in 408 method detect that motor temperature is greater than Max.Temp..In 408, in the time that motor temperature is greater than Max.Temp., method proceeds to 414 and record current voltage as predetermined OV voltage level.Method is then in 416 end.In addition,, when use motor 40 in compressor 10 time, compressor 10 can worked during method 400 under maximum functional loading condition.
With reference to figure 5, the method 500 and the method 500 that show the parameter value for being identified for motor protector start at 502 places.
In 504, determine the LV for motor.As described above, LV level is provided as a part for the specification of manufacturer.So, can determine LV level by reference to the operations specifications of the manufacturer for motor.
In 506, determine the OV for motor.For example, can use method 400 described in conjunction with Figure 4 above to determine OV.
After having determined LV level and OV level; in 508, can LV level and OV level based on definite determine threshold voltage and the nargin for motor protector 200, to make the threshold voltage (V-Thresh) of protector 200 between LV voltage level and OV voltage level locate suitably to stop the work of compressor.Method is in 510 end.
Using in the motor 40 of aluminium winding, between LV and OV poor, Δ V relative be less than for have copper winding similar motor can be by comparison Δ V.For this reason, may more be difficult to that V-Thresh is set in to suitable level and sentence and guarantee that compressor 10 is operated in LV level place, but quit work before OV level at lower voltage.For this reason, V-Thresh level can be set in the just in time level lower than LV level, but still relatively approaches LV level.In addition; motor protector 200 must have suitable nargin and suitably stop the work of compressor at V-Thresh level place to guarantee motor protector 200; but allow to be operated in LV level place, and still in the situation that working, do not allow voltage to be reduced to the level of OV at compressor 10 and motor 40.
Conventionally, V-Thresh level can be set as the voltage to 8V lower than the 4V of LV.Continue example above, for example, for compressor 10 and the motor 40 with the LV of 180V and the OV of 170V to 172V, V-Thresh level can be 175V to 176V.In addition can be 1V to 2V for the nargin of protector 200.
As shown in Figure 2, protector 200 can be bimetal strip, and the temperature of its electric current based on the motor winding of flowing through and motor 40 can be opened fast and motor 40 and input power line 102 are disconnected.In this manner, protector 200 can design and have suitable material and resistance to meet definite V-Thresh and nargin specification.Due to the relatively little Δ V of motor for thering is aluminium winding; compared with thering is the motor of copper winding; in the situation of given relatively little Δ V; protector 200 must design has suitable V-Thresh and nargin level continues to operate in LV place to guarantee compressor 10 and motor 40, but quits work before input voltage reaches OV voltage level.
As example, protector 200 can design has V-Thresh level, its i.e. mid point at Δ V in the middle of LV level and OV level.In addition, can set and be about 25% of Δ V for the nargin level of protector 200.In this manner, protector 200 can work to guarantee that compressor 10 and motor 40 are operated in LV level place, and disconnects or stop the work of compressor 10 and motor 40 at 25% the level place that the mid point that is approximately Δ V added or deducted Δ V.Continue example above, LV is that 180V and OV are in the situation of 172V therein, and motor protector 200 can design has the V-Thresh level of 176V and the nargin of 2V.In this manner, motor protector 200 can disconnect and stop the work of compressor between 176V and 174V.
Method finishes at 510 places.
As mentioned above, with reference to figure 6, show the compressor 10 with protector 200, implement and design compressor 10 according to this technology.As shown, as described above, the compressor 10 of Fig. 6 does not comprise voltage sensor 110 and the temperature sensor 120 for testing.
Aforementioned description is illustrative and is not intended to limit disclosure, its application or purposes.Can implement in a variety of forms the broad teachings of disclosure.Therefore, although present disclosure comprises particular example, but should not limit the actual range of present disclosure, this is because other amendments after study accompanying drawing, specification and claims will become obvious.As used herein, at least one in phrase A, B and C should be understood to mean to use the logic (A or B or C) of nonexcludability logic OR.Should be understood that, one or more step in method can be carried out with different order (or side by side) in the case of not changing the principle of present disclosure.
In this application, comprise definition below, term module can replace with term circuit.Term module can relate to following content, be a part for following content or comprise following content: application-specific integrated circuit (ASIC) (ASIC); Numeral, simulation or hybrid analog-digital simulation/Digital Discrete circuit; Numeral, simulation or hybrid analog-digital simulation/digital integrated circuit; Combinational logic circuit; Field programmable gate array (FPGA); The processor (shared, special or group) of run time version; The memory (shared, special or group) of the code that storage is carried out by processor; Other suitable hardware componenies of described function are provided; Or the some or all of combination above in SOC (system on a chip) for example.
As the term code being used can comprise software, firmware and/or microcode, and can relate to program, routine, function, class and/or object above.Term shared processing device comprises the single processor of carrying out from the some or all of codes of multiple modules.Term group processor comprises in conjunction with other processor carries out the processor from the some or all of codes of one or more module.Term shared storage comprises the single memory of storage from the some or all of codes of multiple modules.Term group memory comprises the memory from the some or all of codes of one or more module in conjunction with other memory stores.Term memory can be the subset of term computer-readable medium.Term computer-readable medium does not comprise the transient state signal of telecommunication and the electromagnetic signal propagated by medium, and therefore can think tangible and non-transient state.The non-limiting example of the tangible computer-readable medium of non-transient state comprises nonvolatile memory, volatile memory, magnetic memory and optical memory.
Equipment described in the application and method can partly or entirely be implemented by one or more computer program of carrying out by one or more processor.Computer program comprises the processor executable being stored on the tangible computer-readable medium of at least one non-transient state.Computer program also can comprise and/or depend on the data of storage.
Claims (15)
1. a compressor, comprising:
The single-phase motor of drive compression mechanism, described motor has rotor and stator, and described stator comprises aluminium winding; And
Protector, described protector is attached to described stator, described protector is configured in the time that the input voltage to described motor of power supply is less than threshold voltage value, described motor and described power supply be disconnected, described threshold voltage value is arranged on the level place between the minimum operating voltages of described compressor and the mistake thermal voltage of described compressor, and described thermal voltage is corresponding with the overtemperature of described motor excessively;
Wherein, described threshold voltage value is arranged on described minimum operating voltages and the described level place of crossing between thermal voltage; and wherein said protector comprises that nargin level is greater than and describedly crosses thermal voltage to make described threshold voltage deduct described nargin level, and makes described threshold voltage add the above nargin level to be less than described minimum operating voltages.
2. compressor according to claim 1, wherein, described threshold voltage value is arranged on the midpoint between described minimum operating voltages and described threshold voltage.
3. compressor according to claim 2, wherein, described nargin level is arranged on as described minimum operating voltages and described 25% the value place of crossing difference between thermal voltage.
4. compressor according to claim 1, wherein, described nargin level is arranged on as described minimum operating voltages and described 25% the value place of crossing difference between thermal voltage.
5. compressor according to claim 1, wherein, described compressor is scroll compressor.
6. a method, comprising:
Use has the single-phase motor drive compression mechanism of rotor and stator, and described stator comprises aluminium winding; And
In the time that being less than threshold voltage value, the input voltage to described motor of power supply use protector that described motor and described power supply are disconnected, described threshold voltage value is arranged on the level place between the minimum operating voltages of described compressor and the mistake thermal voltage of described compressor, and described thermal voltage is corresponding with the overtemperature of described motor excessively;
Wherein, described threshold voltage value is arranged on described minimum operating voltages and the described level place of crossing between thermal voltage; and wherein said protector comprises that nargin level is greater than and describedly crosses thermal voltage to make described threshold voltage deduct described nargin level, and makes described threshold voltage add the above nargin level to be less than described minimum operating voltages.
7. method according to claim 6, wherein, described threshold voltage value is arranged on the midpoint between described minimum operating voltages and described threshold voltage.
8. method according to claim 7, wherein, described nargin level is arranged on as described minimum operating voltages and described 25% the value place of crossing difference between thermal voltage.
9. method according to claim 6, wherein, described nargin level is arranged on as described minimum operating voltages and described 25% the value place of crossing difference between thermal voltage.
10. method according to claim 6, wherein, described compressor is scroll compressor.
11. 1 kinds of equipment, comprising:
Protector, described protector is arranged to the stator of the single-phase motor of the compressing mechanism that is attached to drive compression machine, described motor has rotor and comprises the described stator of aluminium winding, described protector is also configured in the time that the input voltage to described motor of power supply is less than threshold voltage value, described motor and described power supply be disconnected, described threshold voltage value is arranged on the level place between the minimum operating voltages of described compressor and the mistake thermal voltage of described compressor, and described thermal voltage is corresponding with the overtemperature of described motor excessively;
Wherein, described threshold voltage value is arranged on described minimum operating voltages and the described level place of crossing between thermal voltage; and wherein; described protector comprises that nargin level is greater than and describedly crosses thermal voltage to make described threshold voltage deduct described nargin level, and makes described threshold voltage add the above nargin level to be less than described minimum operating voltages.
12. equipment according to claim 11, wherein, described threshold voltage value is arranged on the midpoint between described minimum operating voltages and described threshold voltage.
13. equipment according to claim 12, wherein, described nargin level is arranged on as described minimum operating voltages and described 25% the value place of crossing difference between thermal voltage.
14. equipment according to claim 11, wherein, described nargin level is arranged on as described minimum operating voltages and described 25% the value place of crossing difference between thermal voltage.
15. equipment according to claim 11, wherein, described compressor is scroll compressor.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361791330P | 2013-03-15 | 2013-03-15 | |
| US61/791,330 | 2013-03-15 | ||
| US14/193,049 US9407194B2 (en) | 2013-03-15 | 2014-02-28 | System and method for protection of a compressor with an aluminum winding motor |
| US14/193,049 | 2014-02-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104052199A true CN104052199A (en) | 2014-09-17 |
| CN104052199B CN104052199B (en) | 2017-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410096448.8A Active CN104052199B (en) | 2013-03-15 | 2014-03-14 | Compressor, the method and apparatus for protecting compressor |
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| US7081734B1 (en) * | 2005-09-02 | 2006-07-25 | York International Corporation | Ride-through method and system for HVACandR chillers |
| CN102522928A (en) * | 2011-11-25 | 2012-06-27 | 江苏白雪电器股份有限公司 | Motor starter, starting method of motor and compressor |
| CN204068575U (en) * | 2013-03-15 | 2014-12-31 | 艾默生环境优化技术有限公司 | Compressor and the equipment for the protection of compressor |
-
2014
- 2014-03-14 CN CN201410096448.8A patent/CN104052199B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060116797A1 (en) * | 2004-12-01 | 2006-06-01 | Moran Brian D | Method of controlling engine stop-start operation for heavy-duty hybrid-electric and hybrid-hydraulic vehicles |
| US7081734B1 (en) * | 2005-09-02 | 2006-07-25 | York International Corporation | Ride-through method and system for HVACandR chillers |
| CN102522928A (en) * | 2011-11-25 | 2012-06-27 | 江苏白雪电器股份有限公司 | Motor starter, starting method of motor and compressor |
| CN204068575U (en) * | 2013-03-15 | 2014-12-31 | 艾默生环境优化技术有限公司 | Compressor and the equipment for the protection of compressor |
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| CN104052199B (en) | 2017-09-08 |
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