CN105156312A - fixed-frequency compressor starting circuit and starting method - Google Patents
fixed-frequency compressor starting circuit and starting method Download PDFInfo
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- CN105156312A CN105156312A CN201510585375.3A CN201510585375A CN105156312A CN 105156312 A CN105156312 A CN 105156312A CN 201510585375 A CN201510585375 A CN 201510585375A CN 105156312 A CN105156312 A CN 105156312A
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- 239000003999 initiator Substances 0.000 claims description 28
- 230000003111 delayed effect Effects 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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Abstract
The invention discloses a starting circuit and a starting method of a fixed-frequency compressor. The starting method of the fixed-frequency compressor comprises the following steps: starting a fixed-frequency compressor (2); carrying out soft start on the fixed-frequency compressor (2) by utilizing the slope voltage; after the constant-frequency compressor (2) reaches the rated voltage, the constant-frequency compressor (2) is operated at full pressure through the bypass circuit (5). According to the starting method of the fixed-frequency compressor, the starting stress of the exhaust pipe and the suction pipe can be reduced, and the reliability of the compressor is improved.
Description
Technical field
The present invention relates to Compressor Technology field, in particular to a kind of invariable frequency compressor starting circuit and starting method.
Background technique
What existing air energy thermal water unit used has invariable frequency compressor and frequency-changeable compressor.Being direct full voltage starting when using invariable frequency compressor to start, is low-frequency start when adopting frequency-changeable compressor to start.
Because feeding electric motors voltage is voltage rating during the direct full voltage starting of invariable frequency compressor, its torque produced instantaneously is comparatively large, and when causing compressor start, vibration is very large, thus excite outlet pipe and sucking pipe startup stress to exceed standard, Long-Time Service, the easy fatigue fracture of pipeline, makes unit lose efficacy; And when starting, electric current is 4-7 times of rated current, and excessive inrush current can reduce electrical machinery life, can affect the normal use of miscellaneous equipment in same power supply network simultaneously.
Frequency-changeable compressor frequency reducing starts relatively more steady, vibrates less, but the special frequency-changeable compressor of heat pump is few at present, and cost intensive, is not suitable for promoting the use of of heat pump water-heating machine.
Summary of the invention
A kind of invariable frequency compressor starting circuit and starting method are provided in the embodiment of the present invention, the startup stress of outlet pipe and sucking pipe can be reduced, improve the reliability of compressor.
For achieving the above object, the embodiment of the present invention provides a kind of invariable frequency compressor starting method, comprising: start invariable frequency compressor; Ramp voltage is utilized to carry out soft start to invariable frequency compressor; After invariable frequency compressor arrives voltage rating, by bypass resistance, invariable frequency compressor total head is run.
As preferably, ramp voltage is utilized to comprise the step that invariable frequency compressor carries out soft start: after invariable frequency compressor starts, compressor A.C. contactor is connected, and delayed startup ramp voltage to be powered to invariable frequency compressor.
As preferably, ramp voltage is utilized also to comprise the step that invariable frequency compressor carries out soft start: electric current is powered to invariable frequency compressor by thyristor, in power supply process, the angle of flow controlling thyristor increases gradually from initial value, makes motor stator terminal voltage be elevated to voltage rating gradually.
As preferably, bypass resistance is in parallel with thyristor.
As preferably, invariable frequency compressor starting method also comprises: in invariable frequency compressor starting circuit, access soft initiator, provide ramp voltage by soft initiator to invariable frequency compressor.
According to a further aspect in the invention, provide a kind of invariable frequency compressor starting circuit, comprising: invariable frequency compressor; Power supply; Soft initiator, is arranged on the circuit between invariable frequency compressor and power supply, to control invariable frequency compressor soft start.
As preferably, soft initiator comprises thyristor and the bypass resistance in parallel with thyristor, and bypass resistance is provided with switch.
As preferably, invariable frequency compressor starting circuit also comprises A.C. contactor and controls the time delay relay of soft initiator delayed startup, A.C. contactor and time delay relay series connection.
Apply technological scheme of the present invention, invariable frequency compressor starting method comprises: start invariable frequency compressor; Ramp voltage is utilized to carry out soft start to invariable frequency compressor; After invariable frequency compressor arrives voltage rating, by bypass resistance, invariable frequency compressor total head is run.Because invariable frequency compressor carries out soft start by ramp voltage, when can avoid invariable frequency compressor direct full voltage starting, vibration is large, thus the problem causing outlet pipe and sucking pipe startup stress to exceed standard, ensure the electrodeless steady rising of compressor voltage, improve product reliability.
Accompanying drawing explanation
Fig. 1 is the flow chart of the invariable frequency compressor starting method of the embodiment of the present invention;
Fig. 2 is the structural drawing of the invariable frequency compressor starting circuit of the embodiment of the present invention.
Description of reference numerals: 1, power supply; 2, invariable frequency compressor; 3, soft initiator; 4, thyristor; 5, bypass resistance; 6, A.C. contactor; 7, switch; 8, time delay relay.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but not as a limitation of the invention.
Shown in Figure 1, according to embodiments of the invention, invariable frequency compressor starting method comprises: start invariable frequency compressor 2; Ramp voltage is utilized to carry out soft start to invariable frequency compressor 2; After invariable frequency compressor 2 arrives voltage rating, by bypass resistance 5, invariable frequency compressor 2 total head is run.
Because invariable frequency compressor carries out soft start by ramp voltage, when can avoid invariable frequency compressor direct full voltage starting, vibration is large, thus the problem causing outlet pipe and sucking pipe startup stress to exceed standard, ensure the electrodeless steady rising of compressor voltage, improve product reliability.
Ramp voltage is utilized to comprise the step that invariable frequency compressor 2 carries out soft start: after invariable frequency compressor starts, compressor A.C. contactor 6 is connected, and delayed startup ramp voltage to be powered to invariable frequency compressor 2.
Ramp voltage is utilized also to comprise the step that invariable frequency compressor 2 carries out soft start: electric current is powered by thyristor 4 pairs of invariable frequency compressors 2, in power supply process, the angle of flow controlling thyristor 4 increases gradually from initial value, makes motor stator terminal voltage be elevated to voltage rating gradually.Can output linearity voltage by thyristor 4, make magnitude of voltage progressively can be increased to the voltage rating of invariable frequency compressor 2, make the start-up course of invariable frequency compressor 2 steady, the stress of unit outlet pipe and sucking pipe is very little, avoids the risk of pipeline fatigue fracture.
Bypass resistance 5 is in parallel with thyristor 4, at thyristor 4 in running order and the operating voltage of invariable frequency compressor 2 does not reach voltage rating time, bypass resistance 5 disconnects, electric current need flow in invariable frequency compressor 2 through thyristor 4, ensure that the operating voltage of invariable frequency compressor 2 progressively increases by the control of thyristor 4, improve the startup stationarity of invariable frequency compressor 2.After invariable frequency compressor 2 arrives voltage rating, bypass resistance 4 is communicated with, makes circuit be switched to bypass resistance, thyristor 4 can be avoided long-term electric overheated and affect working life.
Invariable frequency compressor starting method also comprises: in invariable frequency compressor starting circuit, access soft initiator 3, provides ramp voltage by soft initiator 3 to invariable frequency compressor 2.By adding soft initiator 3 in the starting circuit of invariable frequency compressor 2, just can progressively be increased by the voltage of soft initiator control invariable frequency compressor 2 easily, invariable frequency compressor 2 is made to realize soft start, starting resistor progressively increases, reduce outlet pipe and sucking pipe startup stress, when avoiding unit Long-Time Service, pipeline fatigue fracture, improves the reliability of unit.
The start-up course of invariable frequency compressor 2 is as follows: after unit powers on, mainboard controller receives the starting-up signal of wire controller, compressor A.C. contactor KM1 coil is made to obtain electric, coil obtains electric rear adhesive KM1 major loop contact, A.C. contactor KM1 auxiliary contact close simultaneously, thus it is electric to make KT obtain, adhesive KT contact after time delay, thus make soft initiator obtain electric work, electric current is first by thyristor loop in soft initiator, the angle of flow of work time control combinations brake tube increases gradually from initial value, motor stator terminal voltage is made to be elevated to voltage rating gradually, therefore whole start-up course is steady, the stress of unit outlet pipe and sucking pipe is very little, avoid the risk of pipeline fatigue fracture, after completing startup, soft initiator is switched to bypass circulation, avoid thyristor long-term electric overheated and affect the life-span.
Soft initiator controls the startup of compressor by the starting time set and initial start-up voltage, starting time and initial start-up voltage can arrange scope according to actual service condition at soft initiator and arrange, and can select best starting time and initial voltage in test process.
According to embodiments of the invention, invariable frequency compressor starting circuit comprises: invariable frequency compressor 2; Power supply 1; Soft initiator 3, is arranged on the circuit between invariable frequency compressor 2 and power supply 1, to control invariable frequency compressor 2 soft start.
Soft initiator 3 is arranged between power supply 1 and invariable frequency compressor 2, when invariable frequency compressor 2 starts, soft start can be carried out by soft initiator 3 pairs of invariable frequency compressors 2, utilize ramp voltage soft starting mode, control invariable frequency compressor 2 stator terminal voltage, output linearity change voltage, electrodeless steady rising, avoids the problem that full voltage starting moment causes vibration of compressor excessive because torque is excessive.
Soft initiator 3 comprises thyristor 4 and the bypass resistance 5 in parallel with thyristor 4, bypass resistance 5 is provided with switch 7.Thyristor 4 can ensure that soft initiator 3 stablizes the voltage of output linearity change, ensures the steady low voltage starting of invariable frequency compressor 2, effectively reduces outlet pipe and sucking pipe startup stress.
Invariable frequency compressor starting circuit also comprises A.C. contactor 6 and controls the time delay relay 8 of soft initiator 3 delayed startup, and A.C. contactor 6 and time delay relay 8 are connected.Time delay relay 8 is connected with A.C. contactor 6, after A.C. contactor 6 is communicated with, time delay relay 8 just can be made to be communicated with, and then soft initiator 3 is started, can control the starting time of soft initiator 3 and initial voltage, thus choose best starting time and initial voltage, make the startup of invariable frequency compressor 2 realize optimization.
Certainly, be more than the preferred embodiment of the present invention.It should be pointed out that for those skilled in the art, under the prerequisite not departing from its general principles, can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (8)
1. an invariable frequency compressor starting method, is characterized in that, comprising:
Start invariable frequency compressor (2);
Ramp voltage is utilized to carry out soft start to invariable frequency compressor (2);
After invariable frequency compressor (2) arrives voltage rating, by bypass resistance (5), invariable frequency compressor (2) total head is run.
2. invariable frequency compressor starting method according to claim 1, is characterized in that, the described ramp voltage that utilizes comprises the step that invariable frequency compressor (2) carries out soft start:
After invariable frequency compressor starts, compressor A.C. contactor (6) is connected, and delayed startup ramp voltage is powered to invariable frequency compressor (2).
3. invariable frequency compressor starting method according to claim 2, it is characterized in that, the described ramp voltage that utilizes also comprises the step that invariable frequency compressor (2) carries out soft start: electric current is powered to invariable frequency compressor (2) by thyristor (4), in power supply process, the angle of flow controlling thyristor (4) increases gradually from initial value, makes motor stator terminal voltage be elevated to voltage rating gradually.
4. invariable frequency compressor starting method according to claim 3, is characterized in that, bypass resistance (5) is in parallel with thyristor (4).
5. invariable frequency compressor starting method according to claim 1, it is characterized in that, described invariable frequency compressor starting method also comprises: in invariable frequency compressor starting circuit, access soft initiator (3), provides ramp voltage by soft initiator (3) to invariable frequency compressor (2).
6. an invariable frequency compressor starting circuit, is characterized in that, comprising:
Invariable frequency compressor (2);
Power supply (1);
Soft initiator (3), is arranged on the circuit between described invariable frequency compressor (2) and described power supply (1), to control described invariable frequency compressor (2) soft start.
7. invariable frequency compressor starting circuit according to claim 6, it is characterized in that, described soft initiator (3) comprises thyristor (4) and the bypass resistance (5) in parallel with described thyristor (4), described bypass resistance (5) is provided with switch (7).
8. invariable frequency compressor starting circuit according to claim 6, it is characterized in that, described invariable frequency compressor starting circuit also comprises A.C. contactor (6) and controls the time delay relay (8) of soft initiator (3) delayed startup, described A.C. contactor (6) and described time delay relay (8) series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510585375.3A CN105156312B (en) | 2015-09-15 | 2015-09-15 | fixed-frequency compressor starting circuit and starting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510585375.3A CN105156312B (en) | 2015-09-15 | 2015-09-15 | fixed-frequency compressor starting circuit and starting method |
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| CN105156312A true CN105156312A (en) | 2015-12-16 |
| CN105156312B CN105156312B (en) | 2018-02-13 |
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| CN201510585375.3A Expired - Fee Related CN105156312B (en) | 2015-09-15 | 2015-09-15 | fixed-frequency compressor starting circuit and starting method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712638A (en) * | 2017-01-16 | 2017-05-24 | 上海费亚泰克工业设备制造有限公司 | Thyristor online operation screw pneumatic engine energy saving drive controller |
| 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 |
| CN108750528A (en) * | 2018-06-08 | 2018-11-06 | 天津诺泰克传动技术有限公司 | A kind of motorized pulleys gently started |
| CN109579388A (en) * | 2018-11-23 | 2019-04-05 | Tcl空调器(中山)有限公司 | Compressor SS (soft start) control circuit, method and air conditioner |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712638A (en) * | 2017-01-16 | 2017-05-24 | 上海费亚泰克工业设备制造有限公司 | Thyristor online operation screw pneumatic engine energy saving drive controller |
| 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 |
| CN108750528A (en) * | 2018-06-08 | 2018-11-06 | 天津诺泰克传动技术有限公司 | A kind of motorized pulleys gently started |
| CN109579388A (en) * | 2018-11-23 | 2019-04-05 | Tcl空调器(中山)有限公司 | Compressor SS (soft start) control circuit, method and air conditioner |
| CN109579388B (en) * | 2018-11-23 | 2021-02-05 | Tcl空调器(中山)有限公司 | Compressor soft start control circuit and method and air conditioner |
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| Publication number | Publication date |
|---|---|
| CN105156312B (en) | 2018-02-13 |
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