CN204886750U - Three phase machine starting circuit and compressor - Google Patents
Three phase machine starting circuit and compressor Download PDFInfo
- Publication number
- CN204886750U CN204886750U CN201520546998.5U CN201520546998U CN204886750U CN 204886750 U CN204886750 U CN 204886750U CN 201520546998 U CN201520546998 U CN 201520546998U CN 204886750 U CN204886750 U CN 204886750U
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- switch
- electric machine
- phase electric
- compressor
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Abstract
The utility model provides a three phase machine starting circuit, included dynamic condenser and controlling means, controlling means includes the control unit and the three -phase switch who is connected with the control unit, first normally closed switch and a normally open switch, three -phase switch establishes ties on first phase line / the phase 2 enzyme line of three phase machine, places in between the three -phase winding and three -phase AC power supply of three phase machine, connects between the first phase line and second phase line of three phase machine behind the first normally closed switch T1 -1 of dynamic condenser C1 series connection, and a normally open switch establishes ties between three -phase switch and three -phase AC power supply, and a normally open switch T1 -2 is applicable to the phase 1 enzyme winding L1 phase 2 enzyme winding L2's of control three phase machine break -make. The utility model also provides a compressor. The utility model discloses a three phase machine starting circuit and compressor has reduced the vibration of a compressor measured time, has improved the reliability of compressor complete machine.
Description
Technical field
The utility model relates to air-conditioning technical field, particularly relates to a kind of three phase electric machine starting circuit and compressor.
Background technology
The starting circuit of general compressor adopts three phase mains directly to access the mode of the motor of compressor, but due to the characteristic of three phase electric machine self, power supply is connected can produce strong torque shock ends instantaneously, thus vibration is too strong when causing compressor start, this effect of vibration makes the ess-strain of pipeline exceed standard on compressor housing, reduces the reliability of complete machine.And existing decompression starting mode or electronic type soft-start mode etc., due to containing transformer or device for high-power power electronic, make the cost of starter higher, practicality is poor.
Utility model content
In view of the present situation of prior art, the purpose of this utility model is to provide a kind of three phase electric machine starting circuit and compressor, the problem that when solving compressor start, torque shock ends is excessive, reduces vibration during compressor start, improves the reliability of compressor complete machine.
For achieving the above object, the utility model adopts following technical scheme:
A kind of three phase electric machine starting circuit, comprises starting capacitance C1 and control device, threephase switch, the first normally closed switch T1-1 and the first normal open switch T1-2 that described control device comprises control unit and is connected with described control unit;
Between the three-phase windings that described threephase switch is connected on described three phase electric machine and three-phase alternating-current supply, be connected between the first phase line of described three phase electric machine and the second phase line after the described first normally closed switch T1-1 of described starting capacitance C1 series connection, described first normal open switch T1-2 is connected in the first phase line/the second phase line of described three phase electric machine, be placed between described threephase switch and described three-phase alternating-current supply, described first normal open switch T1-2 is applicable to the break-make of the first-phase winding L 1/ second-phase winding L 2 controlling described three phase electric machine.
Wherein in an embodiment, described control unit comprises control switch SW, A.C. contactor and the time relay, and described control switch SW connects the coil KM1 of described A.C. contactor and the coil T1 of the described time relay;
The normally opened contact KM1-1 of described A.C. contactor is as described threephase switch, and the normally-closed contact of the described time relay is as described first normally closed switch T1-1, and the normally opened contact of the described time relay is as described first normal open switch T1-2.
Wherein in an embodiment, described control switch SW connects after the coil KM1 of described A.C. contactor and the coil T1 of the described time relay and is connected between the first phase line of described three phase electric machine and third phase line.
Wherein in an embodiment, the described time relay is time-delay relay.
Wherein in an embodiment, the three-phase windings of described three phase electric machine is connected to form star.
The utility model additionally provides a kind of compressor, comprises the three phase electric machine starting circuit described in above-mentioned any one.
The beneficial effects of the utility model are:
Three phase electric machine starting circuit of the present utility model and compressor, be connected between the first-phase winding of three phase electric machine and second-phase winding by the first normally closed switch series connection starting capacitance, during starting, motor is connect the circuit into capacitor start monophase machine, by the characteristic that torque during capacitor start monophase machine changes with starting capacitance, reduce torque during compressor start, reduce vibration during compressor start, improve the reliability of compressor complete machine.Meanwhile, controlled in allowed limits by the torque shock ends selecting suitable starting capacitance can realize when being started by three phase electric machine, reduce the cost of starting circuit, thus improve the practicality of starting circuit.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of three phase electric machine starting circuit one embodiment of the present utility model;
Fig. 2 is the starting state figure of three phase electric machine one embodiment of the present utility model;
Fig. 3 is the normal operating condition figure of three phase electric machine one embodiment of the present utility model.
Embodiment
In order to make the technical solution of the utility model clearly, below in conjunction with accompanying drawing, three phase electric machine starting circuit of the present utility model and compressor are described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the utility model and to be not used in restriction the utility model.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
See Fig. 1 to Fig. 3, three phase electric machine starting circuit of the present utility model comprises starting capacitance C1 and control device, wherein control device comprises control unit, the threephase switch be electrically connected with control unit, the first normal open switch T1-2 and the first normally closed switch T1-1, and control unit controls the closed of threephase switch, the first normal open switch T1-2 and the first normally closed switch T1-1 or opens.
Threephase switch is connected between the three-phase windings of three phase electric machine and three-phase alternating-current supply, and preferably, the voltage of three-phase alternating-current supply is 380V, and frequency is 50HZ.Starting capacitance C1 connects after the first normally closed switch T1-1 and is connected between the first phase line of three phase electric machine and the second phase line, first normal open switch T1-2 is connected in the first phase line/the second phase line of three phase electric machine, be placed between threephase switch and three-phase alternating-current supply, the first normal open switch T1-2 is applicable to the break-make of the first-phase winding L 1/ second-phase winding L 2 controlling three phase electric machine.
It should be understood that three phase electric machine comprises three-phase windings, be respectively first-phase winding L 1, second-phase winding L 2 and third phase winding L 3.The lead-out wire of first-phase winding L 1 correspondence is the first phase line of three phase electric machine, and the lead-out wire of second-phase winding L 2 correspondence is the second phase line of three phase electric machine, and the lead-out wire of third phase winding L 3 correspondence is the third phase line of three phase electric machine.
Preferably, the three-phase windings of three phase electric machine is connected to form star, and namely the first-phase winding L 1 of three phase electric machine, second-phase winding L 2 and third phase winding L 3 are connected to form star.In other embodiments, first-phase winding L 1, second-phase winding L 2 and third phase winding L 3 can also be connected to form triangle etc.Wherein, first-phase winding L 1, second-phase winding L 2 and third phase winding L 3 can be any one in the U phase winding of motor, V phase winding or W phase winding.
When electric motor starting, first control unit controls threephase switch and closes, now the first normally closed switch T1-1 is in closure state, first normal open switch T1-2 is in off-state, the first-phase winding L 1/ second-phase winding L 2 of motor is disconnected with three-phase alternating-current supply, motor is connect the circuit into capacitor start monophase machine, by the characteristic that torque during capacitor start monophase machine changes with starting capacitance, reduce torque during compressor start, reduce vibration during compressor start, improve the reliability of compressor complete machine.Meanwhile, controlled in allowed limits by the torque shock ends selecting suitable starting capacitance can realize when being started by three phase electric machine, reduce the cost of starting circuit, thus improve the practicality of starting circuit.
After electric motor starting completes, control unit controls the first normally closed switch T1-1 and disconnects, and the first normal open switch T1-2 closes, and make the three-phase windings of motor all be connected to three-phase alternating-current supply, compressor is converted to normal operating mode.
As a kind of embodiment, as shown in Figure 1, control unit comprises A.C. contactor, the time relay and control switch SW, wherein, A.C. contactor comprises coil KM1 and normally opened contact KM1-1, and coil KM1 is applicable to control opening or closing of normally opened contact KM1-1.The time relay comprises coil T1, normally opened contact and normally-closed contact, and the coil T1 of the time relay is applicable to control the normally opened contact of correspondence and opening or closing of normally-closed contact.
Be connected to power supply after the coil KM1 of control switch SW series AC contactor and the coil T1 of the time relay, power supply can be two-phase or other DC power supply etc. in three-phase alternating-current supply.More preferably, be connected between the first phase line of three phase electric machine and third phase line after the coil KM1 of control switch SW series AC contactor and the coil T1 of the time relay, namely after the coil KM1 of control switch SW series AC contactor and the coil T1 of the time relay, be connected to first-phase and the third phase of three-phase alternating-current supply.
The normally opened contact KM1-1 of A.C. contactor is as threephase switch, and the normally opened contact of the time relay is as the first normal open switch T1-2, and the normally-closed contact of the time relay is as the first normally closed switch T1-1.When control switch SW closes, the coil KM1 of A.C. contactor powers on and makes normally opened contact KM1-1 adhesive; The coil T1 of the time relay powers on, and makes the normally opened contact adhesive of the time relay, and normally-closed contact disconnects.More preferably, the time relay is time-delay relay, and after namely the coil T1 of the time relay powers on certain hour, the normally opened contact adhesive of the time relay, normally-closed contact disconnects.
As shown in Figure 1, the time relay normally-closed contact series connection starting capacitance C1 after be connected between the first-phase winding L 1 of three phase electric machine and second-phase winding L 2.The following operation principle that this three phase electric machine starting circuit is described according to Fig. 1:
When control switch SW closes, after the coil KM1 of A.C. contactor powers on and makes normally opened contact KM1-1 adhesive, due to the time-lag action of the time relay, the normally opened contact T1-2 of the time relay and the action of normally-closed contact T1-1 lag behind the action of the normally opened contact KM1-1 of A.C. contactor.Now, the normally opened contact T1-2 of the time relay is still in open mode, normally-closed contact T1-1 is still in closure state, the third phase winding L 3 of three phase electric machine and first-phase winding L 1 is made to connect three-phase alternating-current supply, in parallel with first-phase winding L 1 after second-phase winding L 2 tandem promoter electric capacity C1, as shown in Figure 2.
When three phase electric machine starts, starting capacitance C1 has started the effect of phase-splitting, makes the electric current in first-phase winding L 1, second-phase winding L 2 and third phase winding L 3 produce phase difference, to produce rotating magnetic field, thus makes electric motor starting.Like this, when starting, motor is connect the circuit into capacitor start monophase machine, the characteristic changed with starting capacitance by torque during capacitor start monophase machine, reduces torque during compressor start, reduce vibration during compressor start, improve the reliability of compressor complete machine.Meanwhile, controlled in allowed limits by the torque shock ends selecting suitable starting capacitance can realize when being started by three phase electric machine, reduce the cost of starting circuit, thus improve the practicality of starting circuit.
After three phase electric machine has started, the coil T1 of the time relay has powered on starting, makes normally opened contact T1-2 and the normally-closed contact T1-1 action simultaneously of the time relay.Now, the normally-closed contact T1-1 of the time relay disconnects, and the loop at starting capacitance C1 place is disconnected.Meanwhile, the normally opened contact T1-2 of the time relay closes, and make the three-phase windings of motor all be connected to three-phase alternating-current supply, compressor is converted to normal operating mode, as shown in Figure 3.
In other embodiments, threephase switch also can adopt SP3T switch etc., first normally closed switch T1-1 can adopt with the first normal open switch T1-2 the electronic switch be connected with control unit, and control unit control SP3T switch, the first normally closed switch T1-1 and the first normal open switch T1-2 opening or closing.Now, control unit can be the controllers such as single-chip microcomputer.Control unit controls the first normal open switch T1-2 and the first normally closed switch T1-1 action simultaneously, and all lags behind the action of SP3T switch, the course of work and operation principle described above.
The utility model additionally provides a kind of compressor, comprises the three phase electric machine starting circuit of above-mentioned any embodiment.
Three phase electric machine starting circuit of the present utility model and compressor, be connected between the first-phase winding of three phase electric machine and second-phase winding by the first normally closed switch series connection starting capacitance, during starting, motor is connect the circuit into capacitor start monophase machine, by the characteristic that torque during capacitor start monophase machine changes with starting capacitance, reduce torque during compressor start, reduce vibration during compressor start, improve the reliability of compressor complete machine.Meanwhile, controlled in allowed limits by the torque shock ends selecting suitable starting capacitance can realize when being started by three phase electric machine, reduce the cost of starting circuit, thus improve the practicality of starting circuit.
The above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (6)
1. a three phase electric machine starting circuit, is characterized in that, comprises starting capacitance C1 and control device, threephase switch, the first normally closed switch T1-1 and the first normal open switch T1-2 that described control device comprises control unit and is connected with described control unit;
Between the three-phase windings that described threephase switch is connected on described three phase electric machine and three-phase alternating-current supply, be connected between the first phase line of described three phase electric machine and the second phase line after the described first normally closed switch T1-1 of described starting capacitance C1 series connection, described first normal open switch T1-2 is connected in the first phase line/the second phase line of described three phase electric machine, be placed between described threephase switch and described three-phase alternating-current supply, described first normal open switch T1-2 is applicable to the break-make of the first-phase winding L 1/ second-phase winding L 2 controlling described three phase electric machine.
2. three phase electric machine starting circuit according to claim 1, it is characterized in that, described control unit comprises control switch SW, A.C. contactor and the time relay, and described control switch SW connects the coil KM1 of described A.C. contactor and the coil T1 of the described time relay;
The normally opened contact KM1-1 of described A.C. contactor is as described threephase switch, and the normally-closed contact of the described time relay is as described first normally closed switch T1-1, and the normally opened contact of the described time relay is as described first normal open switch T1-2.
3. three phase electric machine starting circuit according to claim 2, it is characterized in that, described control switch SW connects after the coil KM1 of described A.C. contactor and the coil T1 of the described time relay and is connected between the first phase line of described three phase electric machine and third phase line.
4. three phase electric machine starting circuit according to claim 2, is characterized in that, the described time relay is time-delay relay.
5. the three phase electric machine starting circuit according to any one of claim 1-4, is characterized in that, the three-phase windings of described three phase electric machine is connected to form star.
6. a compressor, is characterized in that, comprises the three phase electric machine starting circuit described in any one of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520546998.5U CN204886750U (en) | 2015-07-24 | 2015-07-24 | Three phase machine starting circuit and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520546998.5U CN204886750U (en) | 2015-07-24 | 2015-07-24 | Three phase machine starting circuit and compressor |
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| Publication Number | Publication Date |
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| CN204886750U true CN204886750U (en) | 2015-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520546998.5U Expired - Fee Related CN204886750U (en) | 2015-07-24 | 2015-07-24 | Three phase machine starting circuit and compressor |
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| CN (1) | CN204886750U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196562A (en) * | 2017-07-03 | 2017-09-22 | 珠海凌达压缩机有限公司 | Starter, threephase asynchronous machine and compressor |
| CN108306553A (en) * | 2018-03-26 | 2018-07-20 | 上海特波电机有限公司 | Threephase asynchronous machine starting device and its starting method |
| CN109469604A (en) * | 2018-10-08 | 2019-03-15 | 珠海格力电器股份有限公司 | A kind of heat exchange equipment and its control method with multistage efficiency point compressor |
-
2015
- 2015-07-24 CN CN201520546998.5U patent/CN204886750U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196562A (en) * | 2017-07-03 | 2017-09-22 | 珠海凌达压缩机有限公司 | Starter, threephase asynchronous machine and compressor |
| CN108306553A (en) * | 2018-03-26 | 2018-07-20 | 上海特波电机有限公司 | Threephase asynchronous machine starting device and its starting method |
| CN109469604A (en) * | 2018-10-08 | 2019-03-15 | 珠海格力电器股份有限公司 | A kind of heat exchange equipment and its control method with multistage efficiency point compressor |
| CN109469604B (en) * | 2018-10-08 | 2020-02-14 | 珠海格力电器股份有限公司 | Heat exchange equipment with multistage energy efficiency point compressor and control method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20210724 |
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| CF01 | Termination of patent right due to non-payment of annual fee |