CN101145684A - Three-phase compressor phase reversal and loss protection device and method - Google Patents
Three-phase compressor phase reversal and loss protection device and method Download PDFInfo
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- CN101145684A CN101145684A CNA2006100156852A CN200610015685A CN101145684A CN 101145684 A CN101145684 A CN 101145684A CN A2006100156852 A CNA2006100156852 A CN A2006100156852A CN 200610015685 A CN200610015685 A CN 200610015685A CN 101145684 A CN101145684 A CN 101145684A
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Abstract
The invention relates to a protection device and a method for anti-phase/open-phase of a three-phase compressor, so as to solve the non-detection problem when the three-phase of the power supply of the compressor is reversely or erroneously grounded. The device comprises a three-phase compressor feed circuit, a three-phase voltage detection circuit, an anti-phase/open-phase detection circuit, a protection execution circuit, and a power supply circuit. The three-phase voltage detection circuit is composed of a diode rectification circuit bridged over the three-phase line and the ground and an optical coupling transistor circuit bridged over the two ends of the diode; the anti-phase/open-phase detection circuit is composed of a microprocessor input pin connected with the three output terminals of the three-phase voltage detection circuit, a triode relay circuit with the grid thereof connected with the output pin of the microprocessor, an anti-phase/open-phase sound alarm circuit and the power supply circuit; the protection execution circuit is composed of a contactor with the contact point connected with the feed circuit of the three-phase compressor in series and the damping coil thereof controlled by the contact point of the triode relay; and the power supply circuit is composed of the two-phase bridge type rectified, CR and filter circuit after being stepped down by the transformer in the three-phase power supply.
Description
Technical field
The present invention relates to the three phase supply compressor, specifically is a kind of three-phase compressor anti-phase phase-lacking protective device and method.
Background technology
It is 380V, the power supply of 50HZ power supply that air conditioner that some power are bigger such as cabinet air conditioner adopt three phase mains more, and motor also adopts threephase asynchronous machine in its compressor, and the rotor of threephase asynchronous machine adopts cage-type rotor more, and its stator is made up of three phase windings.They also can be connected into star or triangle with even distribution the in 120 ° interval on stator, feed three amplitude equal and opposite in directions during power supply in this three phase winding, but phase place differs the alternating current of 120 ° of phase angles each other, as shown in Figure 1, figure middle and upper part curve representation three-phase current U, V, W, (R, S, T) change curve of the frequency width of cloth, the respective lower arrow be produced under each winding acting in conjunction moment the resultant magnetic field direction, therefore three-phase alternating current has produced the changing rotating magnetic field of direction in the threephase stator winding, it makes to be dynamically connected with pivot and rotates in above-mentioned magnetic field and drive cylinder piston rotation in the compressor with bent axle on it in rotor wherein, the cold media gas that is sucked by the compresser cylinder suction inlet is compressed, refrigerant after being compressed is discharged through cross valve to outdoor or indoor heat exchanger from compressor case top outlet, expansion valve refrigeration or heat after return the compresser cylinder suction inlet, constitute coolant circulating system like this.
But the three phase electric machine in the compressor when wiring error or certain contact bad or disconnect anti-phase (counter-rotating) can take place or phase shortage turns round, when finding antiport, the method of the present general available paraphase of method is handled, the terminal box that is about on the three phase electric machine compressor case is opened, and any two-phase transposing to the electric machine rotation veer in U, V, W (being R, S, T) three phase connections is correctly got final product.But in the time can not in time finding the running of anti-phase or phase shortage compressor being heated up burns compressor electric motor.Existing three-phase compressor has designed the anti-reverse transfer printing brush of three-phase circuit PC for preventing the running of anti-phase, phase shortage, but it can not all prevent all false wiring modes as: just have non-detectable problem when R, S, T and N two-phase are put upside down.
The prior motor phase failure, open-phase protection circuit as shown in Figure 2, it is by current detection circuit; The open-phase protection executive circuit; Power circuit is formed; current detection circuit is by current transformer LA1, LA2, LA3 and rectifier diode VD1-VD3; compositions such as filter capacitor C1-C3; the open-phase protection executive circuit is made up of resistance R 1-R7, transistor V1-V3, relay K, diode VD5, contactor KM1, KM2 and starting button S1, stop button S2 etc., and power circuit is made up of for relay K and drive circuit use power transformer T, rectifier diode VD4, filter capacitor C4, C5 current-limiting resistance R8 and voltage stabilizing didoe VS etc.
Its phase failure; open-phase protection principle process is to press start button S1; the contactor KM1 work of switching on; its three contacts are connected; make the motor M running; three current transformer LA1-LA3 convert three-phase current to three-phase voltage signal; again through the VD1-VD3 rectification; add to after the C1-C3 filtering on the base stage of transistor V1-V3; the V1-V3 circuit is formed the AND circuit that three inputs are arranged; when the three-phase current that is added on motor all just often; A; B; 3 voltage to earths of C are identical to make the equal conducting of V1-V3; make the relay K adhesive; KM2 keeps the KM1 adhesive; the three phase mains of motor M is kept connection; when arbitrary when disconnecting phase shortage mutually in the above-mentioned three phase mains; then this to detect voltage signal mutually be zero, corresponding transistor ends, and makes relay K and contactor KM1; KM2 discharges; cut off the three phase mains of motor M, thereby protect it can be because of crossing cause thermal damage.
But the current detection circuit of existing above-mentioned motor protective circuit makes that volume is big, it is more numerous to make because used LA1, LA2, LA3 current transformer, can not detect the misphase problem in addition.
Summary of the invention
The present invention can not all detect all false wirings and proposes a kind of three-phase compressor anti-phase phase-lacking protective device and method for anti-phase, the phase shortage that solves above-mentioned existing three-phase compressor and exist is difficult for detection problem and the anti-reverse transfer printing brush of present three-phase circuit, and its protective device includes: the three-phase compressor power supply circuits; The three-phase voltage detecting circuit; The anti-phase lack detection circuit; Anti-phase open-phase protection executive circuit; Power circuit, it is characterized in that: its three-phase voltage detecting circuit is by dropping resistor, the diode rectifier circuit of cross-over connection between three-phase wire and ground, and cross-over connection receives the photo-coupled transistor of three phase rectifier voltage in the diode two ends light-emitting diode, the two poles of the earth are connected to dc power supply and ground, the luminous phototriode formation of input utmost point reception diode by resistance; Its anti-phase lack detection circuit is by three input pins of microprocessor that are connected to the output of three-phase voltage detecting circuit by resistance, collector electrode is connected to dc power supply by relay coil, grounded emitter, grid is connected to the triode relay circuit of microprocessor output pin, be connected to the acoustic alarm circuit of divider resistance between microprocessor anti-phase phase shortage warning output pin and ground, dc power supply and be connected to triode between this power supply and ground by resistance, the DC power supply that voltage-stabiliser tube forms constitutes; Its dc power supply is made of through transformer step-down, diode bridge rectification, resistance, capacitance decompression filtering the two-phase in the three phase mains; Its anti-phase open-phase protection executive circuit is serially connected with the three-phase compressor power supply circuits by contact, and restraining coil and above-mentioned triode relay tip and power series are constituted by the three-phase contactor of above-mentioned triode relay tip control.
Dc power supply also can constitute through transformer step-down, bridge rectifier, capacitance-resistance filter by～220, and above-mentioned contactor also can be replaced by contactless thyristor.
Three-phase compressor anti-phase phase failure protection method of the present invention includes: power up the entry into service stage to three-phase compressor; Three-phase voltage detects the stage; Anti-phase phase shortage detection-phase; Whether the anti-phase phase shortage is judged the stage; If then protect the execution phase.
Advantage and good effect: three-phase compressor anti-phase phase-lacking protective device of the present invention and method compared with prior art have:
1. voltage detection circuit reduces the protective device volume without instrument transformer, makes and simplifies.
2. the present invention can accurately detect three-phase compressor power supply anti-phase open-phase fault, R, S, T, puts upside down misconnection mutually with N, and audible alarm is arranged, and guarantees that compressor electric motor can not burn out because of anti-phase, phase shortage.
Description of drawings
Fig. 1 produces rotating magnetic field figure in three-phase current angular frequency-changes in amplitude curve and the threephase stator winding;
Fig. 2 is existing motor open-phase protection circuit figure;
Fig. 3 is a three-phase compressor anti-phase phase-lacking protective device block diagram of the present invention;
Fig. 4 is a three-phase compressor anti-phase phase failure protection method flow chart of the present invention;
Fig. 5 detects logic diagram for three-phase compressor anti-phase phase-lacking protective device of the present invention;
Fig. 6 is a three-phase compressor anti-phase phase-lacking protective device embodiment schematic diagram of the present invention;
Embodiment
Lift following example and accompanying drawings again in down in order to further specify device and method content of the present invention, principle and technical scheme: shown in Fig. 4-6, three-phase compressor anti-phase phase-lacking protective device of the present invention includes: three-phase compressor M power supply circuits; The three-phase voltage detecting circuit; The anti-phase lack detection circuit; Anti-phase open-phase protection executive circuit; Power circuit, it is characterized in that: its three-phase voltage detecting circuit is by dropping resistor R1, R2, R3, diode D6, D7, the D8 rectification circuit of cross-over connection between three-phase wire and ground, and cross-over connection receives three phase rectifier voltage in diode D6, D7, D8 two ends photo-coupled transistor PC1, PC2, the light-emitting diode of PC3, the two poles of the earth are connected to dc power supply DC5V and ground, the luminous phototriode formation of input utmost point reception diode by resistance R 4, R6, R8; Its anti-phase lack detection circuit is by passing through resistance R 5, R7, R9 is connected to three input pins 5 of microprocessor of three-phase voltage detecting circuit output, 6,2, collector electrode is connected to dc power supply DC15V by relay coil, grounded emitter, grid is connected to the triode Q1 relay circuit of microprocessor output pin 7, by resistance R 12, R13 divides the audible alarm circuit BZ01E that is crimped between microprocessor anti-phase phase shortage warning output pin 3 and ground, be connected to dc power supply DC5V and be connected to triode Q2 between this power supply and ground by resistance, the DC power supply that voltage-stabiliser tube ZD1 forms constitutes; Its dc power supply is made of through transformer T1 step-down, diode D1, D2, D3, D4 bridge rectifier, resistance R 14, capacitor C 1, C2, C3, C4 step-down filtering the two-phase R in the three phase mains, T; Its anti-phase open-phase protection executive circuit is serially connected with the three-phase compressor power supply circuits by contact J1, J2, J3; restraining coil and above-mentioned triode relay J ' contact J ' 1 and power series are constituted by the three-phase contactor J of above-mentioned triode Q1 relay J ' contact J1 ' control.
Dc power supply also can constitute through transformer step-down, bridge rectifier, capacitance-resistance filter by～220, and above-mentioned contactor also can be replaced by contactless thyristor.
Its three-phase compressor anti-phase phase failure protection method includes: power up the entry into service stage to three-phase compressor; Three-phase voltage detects the stage; Anti-phase phase shortage detection-phase; Whether the anti-phase phase shortage is judged the stage; If then protect the execution phase.
Three-phase compressor anti-phase phase-lacking protective device of the present invention detects logic as shown in Figure 5, and last figure is R, S, T three-phase voltage curve chart, and figure below is three-phase voltage detecting circuit output 0-5V high-low level figure, and its detection logic is:
1. with the high level signal of the perception R of 25ms second unit phase, if just be treated to 1 time mistake when detecting less than high level signal.
2. after receiving R phase high level signal 8.25ms, detect 4 times,, be treated to mistake 1 time if when not receiving the high level signal of S phase more than 3 times with 250us unit.
3. after receiving R phase high level signal 13.75ms, detect 4 times,, be treated to mistake 250us1 time if when not receiving the high level signal of T phase more than 3 times with 250us unit.
4. above-mentioned 1,2,3 mistake recurs 10 times.
Claims (3)
1. a three-phase compressor anti-phase phase-lacking protective device includes: the three-phase compressor power supply circuits; The three-phase voltage detecting circuit; The anti-phase lack detection circuit; Anti-phase open-phase protection executive circuit; Power circuit, it is characterized in that: its three-phase voltage detecting circuit is by dropping resistor, the diode rectifier circuit of cross-over connection between three-phase wire and ground, and cross-over connection receives the photo-coupled transistor of three phase rectifier voltage in the diode two ends light-emitting diode, the two poles of the earth are connected to dc power supply and ground, the luminous phototriode formation of input utmost point reception diode by resistance; Its anti-phase lack detection circuit is by three input pins of microprocessor that are connected to the output of three-phase voltage detecting circuit by resistance, collector electrode is connected to dc power supply by relay coil, grounded emitter, grid is connected to the triode relay circuit of microprocessor output pin, be connected to the acoustic alarm circuit of divider resistance between microprocessor anti-phase phase shortage warning output pin and ground, dc power supply and be connected to triode between this power supply and ground by resistance, the DC power supply that voltage-stabiliser tube forms constitutes; Its dc power supply is made of through transformer step-down, diode bridge rectification, resistance, capacitance decompression filtering the two-phase in the three phase mains; Its anti-phase open-phase protection executive circuit is serially connected with the three-phase compressor power supply circuits by contact, and restraining coil and above-mentioned triode relay tip and power series are constituted by the three-phase contactor of above-mentioned triode relay tip control.
2. three-phase compressor anti-phase phase-lacking protective device according to claim 1 is characterized in that: dc power supply also can constitute through transformer step-down, bridge rectifier, capacitance-resistance filter by～220, and above-mentioned contactor also can be replaced by contactless thyristor.
3. a three-phase compressor anti-phase phase failure protection method includes: power up the entry into service stage to three-phase compressor; Three-phase voltage detects the stage; Anti-phase phase shortage detection-phase; Whether the anti-phase phase shortage is judged the stage; If then protect the execution phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100156852A CN101145684A (en) | 2006-09-15 | 2006-09-15 | Three-phase compressor phase reversal and loss protection device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100156852A CN101145684A (en) | 2006-09-15 | 2006-09-15 | Three-phase compressor phase reversal and loss protection device and method |
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| CN101145684A true CN101145684A (en) | 2008-03-19 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916982A (en) * | 2010-08-09 | 2010-12-15 | 宁波奥克斯空调有限公司 | Judgement and protection method for open phase of frequency-conversion air conditioner compressor |
| CN102025123A (en) * | 2010-11-16 | 2011-04-20 | 天津市奥瑞克电梯有限公司 | Elevator control cabinet phase loss detection circuit |
| CN102262218A (en) * | 2011-06-20 | 2011-11-30 | 宁波奥克斯空调有限公司 | Method for detecting open phases of three-phase power source for compressor |
| CN102536763A (en) * | 2010-12-15 | 2012-07-04 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Intelligent control alarming system of air compressor |
| CN106159901A (en) * | 2016-08-19 | 2016-11-23 | 宝亨新电气（集团）有限公司 | A kind of phase-lacking protective device of combined transformer |
| CN106787989A (en) * | 2016-12-23 | 2017-05-31 | 深圳拓邦股份有限公司 | A kind of pile defection device and method of Brush-Less DC motor control circuit |
| CN108292233A (en) * | 2015-12-21 | 2018-07-17 | 英特尔公司 | Open the application processor of virtual machine |
| CN109962460A (en) * | 2019-04-25 | 2019-07-02 | 余臣奎 | A kind of open phases of three-phase power source protection circuit and its phase failure protection method |
-
2006
- 2006-09-15 CN CNA2006100156852A patent/CN101145684A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916982A (en) * | 2010-08-09 | 2010-12-15 | 宁波奥克斯空调有限公司 | Judgement and protection method for open phase of frequency-conversion air conditioner compressor |
| CN101916982B (en) * | 2010-08-09 | 2013-03-27 | 宁波奥克斯空调有限公司 | Judgement and protection method for open phase of frequency-conversion air conditioner compressor |
| CN102025123A (en) * | 2010-11-16 | 2011-04-20 | 天津市奥瑞克电梯有限公司 | Elevator control cabinet phase loss detection circuit |
| CN102025123B (en) * | 2010-11-16 | 2013-05-01 | 天津市奥瑞克电梯有限公司 | Elevator control cabinet phase loss detection circuit |
| CN102536763B (en) * | 2010-12-15 | 2016-02-10 | 山东黄金矿业(莱州)有限公司三山岛金矿 | A kind of Intelligent control alarming system of air compressor |
| CN102536763A (en) * | 2010-12-15 | 2012-07-04 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Intelligent control alarming system of air compressor |
| CN102262218B (en) * | 2011-06-20 | 2013-08-28 | 宁波奥克斯空调有限公司 | Method for detecting open phases of three-phase power source for compressor |
| CN102262218A (en) * | 2011-06-20 | 2011-11-30 | 宁波奥克斯空调有限公司 | Method for detecting open phases of three-phase power source for compressor |
| CN108292233A (en) * | 2015-12-21 | 2018-07-17 | 英特尔公司 | Open the application processor of virtual machine |
| CN108292233B (en) * | 2015-12-21 | 2021-11-09 | 英特尔公司 | Application processor for starting virtual machine |
| CN106159901A (en) * | 2016-08-19 | 2016-11-23 | 宝亨新电气（集团）有限公司 | A kind of phase-lacking protective device of combined transformer |
| CN106787989A (en) * | 2016-12-23 | 2017-05-31 | 深圳拓邦股份有限公司 | A kind of pile defection device and method of Brush-Less DC motor control circuit |
| CN106787989B (en) * | 2016-12-23 | 2019-06-18 | 深圳拓邦股份有限公司 | A kind of pile defection device and method of Brush-Less DC motor control circuit |
| CN109962460A (en) * | 2019-04-25 | 2019-07-02 | 余臣奎 | A kind of open phases of three-phase power source protection circuit and its phase failure protection method |
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Open date: 20080319 |