CN101593966A - Open-phase protector for three-phase motor - Google Patents
Open-phase protector for three-phase motor Download PDFInfo
- Publication number
- CN101593966A CN101593966A CNA2009100740895A CN200910074089A CN101593966A CN 101593966 A CN101593966 A CN 101593966A CN A2009100740895 A CNA2009100740895 A CN A2009100740895A CN 200910074089 A CN200910074089 A CN 200910074089A CN 101593966 A CN101593966 A CN 101593966A
- Authority
- CN
- China
- Prior art keywords
- phase
- circuit
- resistance
- voltage stabilizing
- triode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
A kind of open-phase protector for three-phase motor belongs to three phase alternating current motor safeguard protection field.It is made up of than output control circuit four parts capacitance decompression rectification filtering voltage stabilizing circuit, relay controlling output circuit, three-phase alternating current current rectifier filter sampling circuit, three-phase dc voltage ratio.The capacitance decompression rectification filtering voltage stabilizing circuit is by resistance, and electric capacity, diode, triode, voltage stabilizing didoe connection in series-parallel form; The relay controlling output circuit is by relay, and triode, controllable silicon, optocoupler, diode, resistance string are formed in parallel; The three-phase dc voltage ratio is formed by diode, resistance, electric capacity, voltage stabilizing didoe, optocoupler connection in series-parallel than output control circuit; The three-phase alternating current current rectifier filter sampling circuit is by resistance, and electric capacity, diode connection in series-parallel form.Open-phase protector for three-phase motor volume of the present invention is little, in light weight, and the supply power voltage of relay is stable, and protection is reliable.
Description
Technical field
The invention belongs to three phase alternating current motor safeguard protection field, particularly a kind of open-phase protector for three-phase motor.
Background technology
During three phase electric machine runs well, the just approximate sensor transformer that has rotating part of the combination of its stator, rotor coil.When C phase phase shortage, Lc can produce an induced voltage under the induction effect of La and Lb.Record this induced voltage through experiment and equal about 83% of primary voltage, this induced voltage can be by continuing to the main contactor coil power supply behind the main contactor.Therefore, the induced voltage after the phase shortage still can make main contactor continue adhesive work, makes motor remain in operation under open-phase fault, causes motor coil overheated, thereby burns motor.Be damaged for fear of motor when the power supply generation open-phase fault; the inventor once with submit " open-phase protector for three-phase motor " patent (patent No. 200820076822.8) in 2008 years _ month day to; though this patent has solved the protection problem of three phase electric machine under open-phase fault; but it is bigger that this device remains at volume, weight, the defective of the stability deficiency of control relay supply power voltage.
Summary of the invention
Purpose of the present invention is intended to overcome the defective of above-mentioned prior art, and the open-phase protector for three-phase motor that a kind of volume is little, in light weight, stable, sensitivity is higher is provided.
The object of the present invention is achieved like this: a kind of open-phase protector for three-phase motor, form than output control circuit four parts by capacitance decompression rectification filtering voltage stabilizing circuit, relay controlling output circuit, three-phase alternating current current rectifier filter sampling circuit, three-phase dc voltage ratio.It is characterized in that the capacitance decompression rectification filtering voltage stabilizing circuit is made up of resistance, electric capacity, diode, triode, voltage stabilizing didoe connection in series-parallel.This capacitance decompression rectification filtering voltage stabilizing circuit is connected the side design with three phase mains have a reduction voltage circuit, arbitrary end that is connected to this reduction voltage circuit of three phase mains, and the arbitrary phase of another of three phase mains then is connected with rectification filtering voltage stabilizing circuit.The emitter of triode is connected with relay in the capacitance decompression rectification filtering voltage stabilizing circuit, and collector electrode is connected with current rectifying and wave filtering circuit, and base stage then is connected with voltage stabilizing didoe.Three-phase alternating-current supply is by resistance, capacitance decompression, through diode rectification, capacitor filtering forms a direct voltage, again through resistance, voltage stabilizing didoe, triode voltage stabilizing, obtain a galvanic current behind the capacitor filtering and press, use for the relay controlling output circuit.
Described relay controlling output circuit is composed in parallel by relay, triode, controllable silicon, optocoupler, diode and resistance string.
Described three-phase dc voltage ratio is made up of diode, resistance, electric capacity, voltage stabilizing didoe and optocoupler connection in series-parallel than output control circuit.
Described three-phase alternating current current rectifier filter sampling circuit is made up of resistance, electric capacity, diode connection in series-parallel.
Open-phase protector for three-phase motor of the present invention is improved prior art, has omitted power transformer, makes finished-product volume diminish, and weight lightens.Increased voltage stabilizing circuit and optocoupler, made that the supply power voltage of control relay is more stable, protected more reliable.
Description of drawings
Fig. 1 is the circuit structure diagram of open-phase protector for three-phase motor of the present invention.
Fig. 2 is the connection diagram of the present invention and power supply and motor.
Embodiment
Fig. 1 has provided most preferred embodiment of the present invention.Open-phase protector for three-phase motor of the present invention is made up of than output control circuit four parts capacitance decompression rectification filtering voltage stabilizing circuit, relay controlling output circuit, three-phase alternating current current rectifier filter sampling circuit and three-phase dc voltage ratio.
Described capacitance decompression rectification filtering voltage stabilizing circuit is by resistance R 10, R11, capacitor C 4, C5, C6, and diode D10, D11, D12, D13, triode Q1, voltage stabilizing didoe D14 connection in series-parallel forms.This capacitance decompression rectification filtering voltage stabilizing circuit is connected side design with three phase mains have a reduction voltage circuit, this reduction voltage circuit by resistance R 10, capacitor C 4 be formed in parallel, arbitrary end that is connected to this reduction voltage circuit of three phase mains.The arbitrary phase of another of three phase mains then is connected with rectification filtering voltage stabilizing circuit, and this rectification filtering voltage stabilizing circuit is made up of diode D10, D11, D12, D13 and capacitor C 5 connection in series-parallel.The emitter of triode Q1 is connected with relay J in the capacitance decompression rectification filtering voltage stabilizing circuit, and collector electrode is connected with current rectifying and wave filtering circuit, and base stage then is connected with voltage stabilizing didoe D14.Three-phase alternating-current supply is by resistance R 10, capacitor C 4 step-downs, through diode D10, D11, D12, D13 rectification, capacitor C 5 filtering form a direct voltage, again through resistance R 11, voltage stabilizing didoe D14, triode Q1 voltage stabilizing is after capacitor C 6 filtering, on capacitor C 6, obtain a galvanic current and press, use for the relay controlling output circuit.
Described relay controlling output circuit is by relay J, triode Q2, and controllable silicon Q3, optocoupler IC, diode D15, resistance R 12, R13, R14 connection in series-parallel form.Wherein resistance R 12, R13 are the base biasing resistors of triode Q2, and triode Q2 is the control triode of relay J, and its collector electrode is connected with relay J, and emitter then is connected in the capacitance decompression rectification filtering voltage stabilizing circuit.Controllable silicon Q3 is connected between the mid point and negative pole of resistance R 11 and resistance R 12, is subjected to the control of optocoupler IC.Resistance R 14 is the current limliting supplying resistance of optocoupler IC.Diode D15 is a damper diode, is serially connected with between the collector electrode of the emitter of triode Q1 and triode Q2.
Described three-phase dc voltage ratio than output control circuit by diode D4, D5, D6, D7, D8, D9, resistance R 15, R16, capacitor C 7, voltage stabilizing didoe D16, optocoupler IC connection in series-parallel forms.The voltage comparator circuit that three-phase dc voltage behind rectifying and wave-filtering is formed by diode D4, D5, D6, D7, D8, D9, on capacitor C 7, form a comparative voltage through resistance R 16 again, this comparative voltage ends and conducting in order to control voltage stabilizing didoe D16 and optocoupler IC's, and resistance R 15 is the discharge resistance of capacitor C 7.
Described three-phase alternating current current rectifier filter sampling circuit is by resistance R 1, R2, R3, R4, R5, R6, R7, R8, R9, capacitor C 1, C2, C3, and diode D1, D2, D3 connection in series-parallel form.Resistance R 1, R2, R3 are wye connection, are connected to A, B, C three-phase alternating-current supply respectively, and neutral point links to each other with current rectifying and wave filtering circuit.Diode D1, D2, D3 are rectifier diode, and resistance R 4, R5, R6 and capacitor C 1, C2, C3 constitute filter circuit.Resistance R 7, R8, R9 are the discharge resistance of capacitor C 1, C2, C3.
Open-phase protector for three-phase motor of the present invention has five terminals; A, B, C are the three-phase alternating-current supply input, and K1, K2 are the switching value control output end, and K1, K2 are normally open; be serially connected with in the alternating current machine secondary starting and stopping control loop, in order to realize protection control.
Fig. 2 is the connected mode of open-phase protector for three-phase motor of the present invention and power supply and motor.DK is a master switch among the figure, and RD1 is total insurance, and RD2 is the secondary insurance, and ZC is a main contactor, and RJ is a thermal protector, and M is a three phase electric machine, and TA is a stop button, and QA is a start button, and BHQ is this open-phase protector for three-phase motor.
Operation principle of the present invention is as follows: during operate as normal, three-phase alternating voltage is after the three-phase alternating current current rectifier filter sampling circuit, form and corresponding three direct voltages of three-phase alternating voltage on capacitor C 1, C2, C3, these three direct voltages form a comparative voltage through the three-phase dc voltage ratio than output control circuit again on capacitor C 7.Because the three-phase alternating voltage symmetrical balance during operate as normal, so the voltage that forms on capacitor C 7 is 0 or very little, deficiency is so that voltage stabilizing didoe D16 reverse-conducting, so to the not influence of relay controlling output circuit.The supply power voltage of capacitance decompression rectification filtering voltage stabilizing circuit output relay controlling output circuit, the triode Q2 of relay controlling output circuit works in the saturation conduction state, and relay J gets electric adhesive, K1, K2 closure, motor runs well.
When three phase mains in that motor is in service when phase shortage occurring suddenly, three-phase alternating current phase voltage disequilibrium, this unbalanced three-phase alternating voltage after the three-phase alternating current current rectifier filter sampling circuit in capacitor C 1, C2, three direct voltages of the last formation of C3 are also uneven relatively, after the three-phase dc voltage ratio is than output control circuit, on capacitor C 7, form a higher comparative voltage again, this voltage is enough to make voltage-stabiliser tube D16 reverse-conducting, thereby make the diode current flow in the optocoupler IC, promote also conducting of output, trigger controllable silicon Q3 conducting, the base voltage of triode Q2 is by short circuit, so triode Q2 ends, the relay J voltage contact of losing the job disconnects.Because K1, K2 be serially connected with in the motor starting and stopping control circuit, the power supply of control circuit is cut off, and the contactor main contacts in time disconnects, and cuts off motor power, makes motor protected, and has avoided three characteristics of the middle term AC power phase shortage and causes motor to be damaged.
The used relay of open-phase protector for three-phase motor of the present invention has only a mechanical contact, has overcome because of mechanical contact too much to cause the malfunctioning defective of protection system.In addition, operate time of protection of the present invention is fast, and its protection outage action is only relevant with the uneven potential difference of three-phase alternating current, and irrelevant with the equilibrium fluctuations of three-phase alternating current, thereby suitable operating voltage broad.When realizing open-phase protection, can also realize the three-phase alternating voltage unbalance protection.
Claims (4)
1, a kind of open-phase protector for three-phase motor is made up of than output control circuit four parts capacitance decompression rectification filtering voltage stabilizing circuit, relay controlling output circuit, three-phase alternating current current rectifier filter sampling circuit, three-phase dc voltage ratio, it is characterized in that:
Described capacitance decompression rectification filtering voltage stabilizing circuit is by resistance R 10, R11, capacitor C 4, C5, C6, diode D10, D11, D12, D13, triode Q1, voltage stabilizing didoe D14 connection in series-parallel forms, this capacitance decompression rectification filtering voltage stabilizing circuit is connected the side design with three phase mains have a reduction voltage circuit, arbitrary end that is connected to this reduction voltage circuit of three phase mains, the arbitrary phase of another of three phase mains then is connected with rectification filtering voltage stabilizing circuit, the emitter of triode Q1 is connected with relay J in the capacitance decompression rectification filtering voltage stabilizing circuit, collector electrode is connected with current rectifying and wave filtering circuit, and base stage then is connected with voltage stabilizing didoe D14;
Described relay controlling output circuit is by relay J, triode Q2, controllable silicon Q3, optocoupler IC, diode D15, resistance R 12, R13, R14 connection in series-parallel form, and its resistance R 12, R13 are the base biasing resistors of triode Q2, and triode Q2 is the control triode of relay J, its collector electrode is connected with relay J, emitter then is connected in the capacitance decompression rectification filtering voltage stabilizing circuit, and controllable silicon Q3 is connected between the mid point and negative pole of resistance R 11 and resistance R 12, is subjected to the control of optocoupler IC;
Described three-phase dc voltage ratio than output control circuit by diode D4, D5, D6, D7, D8, D9, resistance R 15, R16, capacitor C 7, voltage stabilizing didoe D16, optocoupler IC connection in series-parallel forms.
2, open-phase protector for three-phase motor according to claim 1 is characterized in that: described reduction voltage circuit is formed in parallel by resistance R 10, capacitor C 4.
3, open-phase protector for three-phase motor according to claim 1 is characterized in that: diode D15 is a damper diode in the described relay controlling output circuit, is serially connected with between the collector electrode of the emitter of triode Q1 and triode Q2.
4, open-phase protector for three-phase motor according to claim 1 is characterized in that: resistance R 14 is the current limliting supplying resistance of optocoupler IC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100740895A CN101593966B (en) | 2009-04-01 | 2009-04-01 | Open-phase protector for three-phase motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100740895A CN101593966B (en) | 2009-04-01 | 2009-04-01 | Open-phase protector for three-phase motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101593966A true CN101593966A (en) | 2009-12-02 |
| CN101593966B CN101593966B (en) | 2011-04-20 |
Family
ID=41408481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100740895A Expired - Fee Related CN101593966B (en) | 2009-04-01 | 2009-04-01 | Open-phase protector for three-phase motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101593966B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097787A (en) * | 2011-03-15 | 2011-06-15 | 卫斌鹏 | Motor phase sequence default phase protector adopting resistive-capacitive (RC) phase-shift circuit |
| CN102694541A (en) * | 2011-03-24 | 2012-09-26 | 海洋王照明科技股份有限公司 | Self-locking loop circuit |
| CN104682742A (en) * | 2015-02-06 | 2015-06-03 | 广东南冠电气有限公司 | Single-chip microcomputer power supply circuit applied to faulted neutral line and open phase protection circuit breaker |
| CN107732862A (en) * | 2017-10-20 | 2018-02-23 | 杨蔚星 | A kind of automatically controlled protection switch of three-phase and four-line all direction multifunctional accident |
| CN108092405A (en) * | 2017-12-29 | 2018-05-29 | 上海新时达机器人有限公司 | Electric power controller and robot control system |
| CN110919145A (en) * | 2019-12-31 | 2020-03-27 | 中山市鹰飞电器有限公司 | Electric welding machine protection circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2577489Y (en) * | 2002-08-26 | 2003-10-01 | 陈辉 | Three-phase electric machine open-phase protector |
| CN2896636Y (en) * | 2006-05-23 | 2007-05-02 | 楚国孝 | Three-phase phase-lose protector |
| CN201181840Y (en) * | 2008-04-11 | 2009-01-14 | 卫斌鹏 | Phase-loss protector for three-phase electrical motor |
-
2009
- 2009-04-01 CN CN2009100740895A patent/CN101593966B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097787A (en) * | 2011-03-15 | 2011-06-15 | 卫斌鹏 | Motor phase sequence default phase protector adopting resistive-capacitive (RC) phase-shift circuit |
| CN102097787B (en) * | 2011-03-15 | 2013-07-24 | 卫斌鹏 | Motor phase sequence default phase protector adopting resistive-capacitive (RC) phase-shift circuit |
| CN102694541A (en) * | 2011-03-24 | 2012-09-26 | 海洋王照明科技股份有限公司 | Self-locking loop circuit |
| CN102694541B (en) * | 2011-03-24 | 2016-04-13 | 海洋王照明科技股份有限公司 | Loop latching circuit |
| CN104682742A (en) * | 2015-02-06 | 2015-06-03 | 广东南冠电气有限公司 | Single-chip microcomputer power supply circuit applied to faulted neutral line and open phase protection circuit breaker |
| CN107732862A (en) * | 2017-10-20 | 2018-02-23 | 杨蔚星 | A kind of automatically controlled protection switch of three-phase and four-line all direction multifunctional accident |
| CN107732862B (en) * | 2017-10-20 | 2024-04-19 | 杨蔚星 | Three-phase four-wire omnibearing multifunctional accident electric control protection switch |
| CN108092405A (en) * | 2017-12-29 | 2018-05-29 | 上海新时达机器人有限公司 | Electric power controller and robot control system |
| CN110919145A (en) * | 2019-12-31 | 2020-03-27 | 中山市鹰飞电器有限公司 | Electric welding machine protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101593966B (en) | 2011-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101593966B (en) | Open-phase protector for three-phase motor | |
| CN101882879B (en) | Circuit converting constant current source to constant voltage source and light using same | |
| CN102201666A (en) | Control circuit and motor device using control circuit | |
| CN103022978B (en) | For the over under-voltage protection circuit of multiple pulse rectification circuit | |
| CN102638024B (en) | Interruption line protector | |
| CN203377777U (en) | A soft start circuit of an auxiliary power supply | |
| CN103050938A (en) | Full-automatic over-voltage and under-voltage time-delaying protector | |
| CN202159956U (en) | Three-phase electricity detection controller | |
| CN102097787B (en) | Motor phase sequence default phase protector adopting resistive-capacitive (RC) phase-shift circuit | |
| CN103401215B (en) | A kind of over-and under-voltage protection circuit, protection socket and terminal | |
| CN206099298U (en) | Power supply monitoring circuit | |
| CN103944139B (en) | The decompression delayer of breaker is under-voltage coil | |
| CN102695347B (en) | Power supply circuit for electronic ballast control chip | |
| CN201994637U (en) | Motor comprehensive protector for double-star type network detection | |
| CN104216449A (en) | Controllable alternating-current stabilized-voltage power supply | |
| CN205544213U (en) | Disconnected zero of undervoltage protection ware, open -phase protection circuit are crossed from double entry to three -phase four -wire | |
| CN207283541U (en) | A kind of current loop communication circuit | |
| CN201181840Y (en) | Phase-loss protector for three-phase electrical motor | |
| CN203205828U (en) | LED driving power supply input overvoltage protection circuit | |
| CN203883446U (en) | Circuit breaker undervoltage coil no-voltage time delay device | |
| CN204696962U (en) | A kind of starting of three phases motor controller | |
| CN202652055U (en) | Electrolytic capacitor charging circuit | |
| CN205544218U (en) | Motor control and protection switch with cross heat -carrying memory protect function | |
| CN205960977U (en) | Multi -functional DC power supply controller | |
| CN204732348U (en) | A.C. contactor Width funtion Drive and Control Circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20110420 Termination date: 20120401 |