CN202153717U - Soft starter used for compressor motor - Google Patents
Soft starter used for compressor motor Download PDFInfo
- Publication number
- CN202153717U CN202153717U CN2011202873663U CN201120287366U CN202153717U CN 202153717 U CN202153717 U CN 202153717U CN 2011202873663 U CN2011202873663 U CN 2011202873663U CN 201120287366 U CN201120287366 U CN 201120287366U CN 202153717 U CN202153717 U CN 202153717U
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- soft starter
- compressor
- thyristor
- reduces
- utility
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Abstract
The utility model discloses a soft starter used for a compressor motor. The soft starter comprises two sets of thyristor assemblies, wherein each set of thyristor assembly is composed of two thyristors in inverse parallel connection. The arrangement of the soft starter on a compressor reduces mechanical shock in staring or turning off the compressor, reduces shock to electrical network, and can eliminate water-hammer effect in starting and turning off the compressor; the service lifetime of devices such as motors and the like can be prolonged; three sets of structures of a conventional thyristor assembly are reduced into two sets of structures, and one intermediate set of structure of the conventional thyristor assembly is communicated via leads directly instead of being connected with the thyristor assembly, that is to say, three phases are converted into two substantial phases. The utility model arranges a novel two-control soft starter, which reduces the mechanical shock in staring or turning off the compressor, reduces the shock to the electrical network, saves cost, and improves the reliability of the devices.
Description
Technical field
The utility model relates to a kind of soft starter that is used for compressor electric motor.
Background technology
Compressor is that a kind of low-pressure gas is promoted is a kind of driven fluid machinery of high pressure.Be the heart of refrigerating system such as air-conditioning, refrigerator etc.; It sucks the refrigerant gas of low-temp low-pressure from air intake duct; After driving piston it is compressed through motor rotation; To the refrigerant gas of blast pipe discharge HTHP, for kind of refrigeration cycle provides power, thus the kind of refrigeration cycle of realization compression → condensation → expansion → evaporation (heat absorption).The stator of the motor of at present general compressor directly is connected with power supply, promptly reaches rated voltage after the startup, and the mechanical shock to compressor is very big like this, and is also very big to the impact of whole electrical network.
Soft starter, promptly Soft Starter has another name called soft initiator, is that the soft start of a kind of current collection machine, soft stop, light-load energy saving and kinds of protect function are in the motor control assembly of one.The soft device that opens adopts the three-phase anti-parallel thyristor as voltage regulator, and it is inserted between power supply and the motor stator.Sort circuit such as three-phase thyristor bridge rectification circuit.When using the soft starter actuating motor, the output voltage of thyristor increases gradually, and motor quickens gradually, and up to the full conducting of thyristor, motor is operated on the mechanical property of rated voltage, realizes smoothly starting, and reduces starting current, avoids starting overcurrent tripping.When treating that motor reaches rated revolution; Start-up course finishes, and soft starter replaces the thyristor of having finished the work from employing bypass contactor, for motor runs well rated voltage is provided; To reduce the thermal losses of thyristor; Prolong the useful life of soft initiator, improve its operating efficiency, make electrical network avoid harmonic pollution again.Soft starter also provides the soft stop function simultaneously, and soft stop and Soft Start-up Process are opposite, and voltage reduces gradually, and revolution drops to zero gradually, the torque shock ends of avoiding free parking to cause.
Existing soft starter is generally three-phase, and promptly its chief component is three groups of thyristors; Every group of thyristor is the thyristor that two inverse parallels are provided with; Though this soft starter can play Electric Machine Control effects such as soft start, soft stop, light-load energy saving, because it adopts three-phase structure; Quantitative requirement to thyristor is bigger, and cost is higher; On the other hand, three-phase structure causes the volume of soft starter also comparatively huge, and transportation, installation etc. are also inconvenient.
The utility model content
The goal of the invention of the utility model is: the problem to above-mentioned existence provides a kind of soft starter that is used for compressor electric motor.
The technical scheme that the utility model adopts is such: a kind of soft starter that is used for compressor electric motor, comprise the thyristor assembly, and said thyristor assembly is two groups, every group of thyristor assembly is made up of the thyristor that two inverse parallels are provided with.
As preferably: described soft starter is connected with the stator of compressor electric motor through lead.
Soft starter is set on compressor, make starts or the mechanical shock when shutting down reduces, the impact of electrical network is also reduced, can eliminate starting and the water hammer effect when shutting down; On the other hand, because the mean speed of motor reduced, thereby can prolong useful life of equipment such as motor; Is two groups of structures with the thyristor assembly by existing three groups of structure decrease, and existing centre no longer connects the thyristor assembly for one group, but directly is communicated with lead, is promptly become two phases of essence by three-phase.
In sum, owing to adopted technique scheme, the beneficial effect of the utility model is: the utility model is provided with novel two control soft starters; Make the mechanical shock that starts when perhaps shutting down reduce; Impact to electrical network also reduces, and simultaneously, adopts two control soft starters; Practice thrift cost, improved the reliability of equipment.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Structured flowchart when Fig. 2 uses for the utility model.
Mark among the figure: 1 is compressor, and 2 is motor, and 3 is soft starter, and 4 is lead, and 5 is thyristor.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As shown in Figure 1, a kind of soft starter that is used for compressor electric motor comprises the thyristor assembly, and said thyristor assembly is two groups, and every group of thyristor assembly is made up of the thyristor 5 that two inverse parallels are provided with, and promptly soft initiator 3 is two controls;
During use, described soft starter 3 is connected with the stator of the motor 2 of compressor 1 through lead 4, and is as shown in Figure 2;
When compressor 1 started, soft initiator 3 was started working, and the output voltage of thyristor 5 increases gradually; Motor 2 quickens gradually, and up to thyristor 5 full conductings, motor 2 is operated on the mechanical property of rated voltage; Realize level and smooth the startup; Reduce starting current, avoid starting overcurrent tripping, guaranteed the safety of electrical network etc.Also be similarly when stopping, the torque shock ends that can avoiding free parking to cause.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (2)
1. a soft starter that is used for compressor electric motor comprises the thyristor assembly, it is characterized in that: said thyristor assembly is two groups, and every group of thyristor assembly is made up of the thyristor that two inverse parallels are provided with.
2. the soft starter that is used for compressor electric motor according to claim 1 is characterized in that: described soft starter is connected with the stator of compressor electric motor through lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202873663U CN202153717U (en) | 2011-08-09 | 2011-08-09 | Soft starter used for compressor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202873663U CN202153717U (en) | 2011-08-09 | 2011-08-09 | Soft starter used for compressor motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202153717U true CN202153717U (en) | 2012-02-29 |
Family
ID=45694210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202873663U Expired - Fee Related CN202153717U (en) | 2011-08-09 | 2011-08-09 | Soft starter used for compressor motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202153717U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156312A (en) * | 2015-09-15 | 2015-12-16 | 珠海格力电器股份有限公司 | fixed-frequency compressor starting circuit and starting method |
| CN108204696A (en) * | 2017-11-28 | 2018-06-26 | 珠海格力电器股份有限公司 | Compressor control method, device and system, storage medium and processor |
-
2011
- 2011-08-09 CN CN2011202873663U patent/CN202153717U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156312A (en) * | 2015-09-15 | 2015-12-16 | 珠海格力电器股份有限公司 | fixed-frequency compressor starting circuit and starting method |
| CN105156312B (en) * | 2015-09-15 | 2018-02-13 | 珠海格力电器股份有限公司 | fixed-frequency compressor starting circuit and starting method |
| CN108204696A (en) * | 2017-11-28 | 2018-06-26 | 珠海格力电器股份有限公司 | Compressor control method, device and system, storage medium and processor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120229 Termination date: 20120809 |