CN110360730A - Automatic compensation start-up circuit and its control method and air conditioner - Google Patents
Automatic compensation start-up circuit and its control method and air conditioner Download PDFInfo
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- CN110360730A CN110360730A CN201910723188.5A CN201910723188A CN110360730A CN 110360730 A CN110360730 A CN 110360730A CN 201910723188 A CN201910723188 A CN 201910723188A CN 110360730 A CN110360730 A CN 110360730A
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- phase
- alternating current
- phase alternating
- capacitance group
- current bus
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Motor And Converter Starters (AREA)
Abstract
The invention discloses automatic compensation start-up circuit and its control method and air conditioners, wherein compensation start-up circuit includes three-phase alternating current bus, single-phase compensating capacitance group, three-phase compensating capacitance group, power contactor KM1 and controller three-phase alternating current bus to be connected to electrical equipment automatically；The general power P of controller detection three-phase alternating current bus when starting, single-phase compensating capacitance group and/or three-phase compensating capacitance group are controlled in general power P deficiency entry condition to three-phase alternating current bus-bar collocation electric energy, and power contactor KM1 conducting is controlled when general power P meets entry condition and is started；The present invention can detect electrical network capacity and three-phase imbalance situation automatically, and then compensate automatically；Effective solution is in electricity consumption density biggish place, the problem of heavy-duty motor normally starts in the case where electrical network capacity is insufficient or three-phase imbalance, improves the reliability of equipment.
Description
Technical field
The present invention relates to electric motor starting control circuit more particularly to a kind of start-up circuit that can be compensated automatically and its controlling parties
Method and air conditioner.
Background technique
For large power air-conditioned unit, starting current and power be it is very big, be particularly used in some use
When the biggish place of electric density, often because the off-capacity or three-phase imbalance of power grid, cause unit to be difficult normally to start,
It needs to turn off some other loads in distribution network, just can guarantee the normal starting of air-conditioner set, one is caused to client in this way
Fixed influence.
Therefore, a kind of starting control circuit that can be compensated electrical network capacity automatically, start air-conditioner set smoothly how is designed
It is industry technical problem urgently to be resolved.
Summary of the invention
In order to solve in the prior art because of electrical network capacity deficiency, electric machinery electrical equipment is not easy the defect normally started, this
Invention proposes a kind of start-up circuit that can be compensated automatically and its control method and air conditioner.
The technical solution adopted by the present invention is that designing a kind of automatic compensation start-up circuit, including three-phase alternating current bus, use
With to the single-phase bus-bar collocation electric energy in three-phase alternating current bus single-phase compensating capacitance group, to in three-phase alternating current bus
Three-phase bus compensation electric energy three-phase compensating capacitance group, to by three-phase alternating current bus connection electrical equipment electrical power contacts
Device KM1 and controller；The general power P of the controller detection three-phase alternating current bus, is opened in general power P deficiency when starting
Single-phase compensating capacitance group and/or three-phase compensating capacitance group are controlled to three-phase alternating current bus-bar collocation electric energy, in total work when dynamic condition
Power contactor KM1 conducting is controlled when rate P meets entry condition to be started.
The controller by voltage sensor and current transformer acquire each phase of three-phase alternating current bus voltage value U and
Current value I, and the general power P of three-phase alternating current bus is calculated accordingly.
The single-phase compensating capacitance group includes three compensation branches, and a compensation branch is correspondingly connected with the three-phase alternating current
A phase line in bus；Every compensation branch includes at least concatenated single-phase switch, reactor and capacitor；The single-phase switch
It is controlled by the controller.
The single-phase switch uses thyristor J.
The three-phase compensating capacitance group connects the three-phase alternating current bus comprising sequentially connected threephase switch, electricity
Anti- device group and capacitance group；The threephase switch is controlled by the controller.
The threephase switch uses contactor KM.
The three-phase alternating current bus connection three-phase charging bus, the single-phase compensating capacitance group and three-phase compensating capacitance group
It is connected in parallel on three-phase charging bus；The three-phase charging bus passes through the second circuit breaker Q F2 connection three-phase alternating current bus.
The three-phase alternating current bus passes through the extraneous AC power source of the first circuit breaker Q F1 connection.
The electrical equipment is compressor.
The present invention also designs the control method of above-mentioned automatic compensation start-up circuit comprising: to single-phase compensating capacitance group and
Three-phase compensating capacitance group charges simultaneously, and capacitor electricity is made to reach saturation；Acquire the voltage of each phase of three-phase alternating current bus
Value U and current value I, and the general power P of three-phase alternating current bus is calculated accordingly；It is controlled in general power P deficiency entry condition single
Phase compensating capacitance group and/or three-phase compensating capacitance group meet entry condition in general power P to three-phase alternating current bus-bar collocation electric energy
When control electrical equipment starting.
The control method specifically includes the following steps:
Step 1. charges simultaneously to single-phase compensating capacitance group and three-phase compensating capacitance group, and capacitor electricity is made to reach saturation shape
State;
Step 2. acquires the voltage value U and current value I of each phase of three-phase alternating current bus, calculates three-phase alternating current according to formula P=UI
The general power P of bus；
Step 3. judges whether the general power P of three-phase alternating current bus is greater than N times of electrical equipment rated power, is to go to step 7,
Otherwise sequence executes；
Three-phase compensating capacitance group is connected three-phase alternating current bus by step 4., carries out discharging compensation to three-phase alternating current bus；It is disconnected
Open single-phase compensating capacitance group；
Step 5. acquires the voltage value U and current value I of each phase of three-phase alternating current bus, calculates three-phase alternating current according to formula P=UI
The general power P of bus；
Step 6. judges whether the general power P of three-phase alternating current bus is greater than M times of electrical equipment rated power, is sequentially to hold
Row, otherwise goes to step 4；
Step 7. disconnects single-phase compensating capacitance group and three-phase compensating capacitance group and three-phase alternating current bus, by the three-phase alternating current goddess of lightning
Line connects electrical equipment, is allowed to start.
The step 7 specifically includes the following steps:
Step 7a. judges that the degree of balance of each phase power of three-phase alternating current bus is to go to step whether within the scope of the A% of permission
7c, otherwise sequence executes；
Step 7b. is corresponding to connect the minimum phase of power in three-phase alternating current bus for single-phase compensating capacitance group, to the minimum phase of power
Discharging compensation is carried out, 7a is then gone to step；
Step 7c. disconnects single-phase compensating capacitance group and three-phase compensating capacitance group and three-phase alternating current bus, by three-phase alternating current
Bus connects electrical equipment, is allowed to start.
The value range of the N is 115% to 85%；The value range of the M is 110% to 90%.
The value range of the A is ± 15.
The present invention also designs a kind of air conditioner comprising compressor, the compressor are started using above-mentioned automatic compensation
Circuit.
The present invention also designs a kind of air conditioner comprising compressor, the compressor are started using above-mentioned automatic compensation
The control method of circuit.
The beneficial effect of the technical scheme provided by the present invention is that:
The present invention can detect electrical network capacity and three-phase imbalance situation automatically, and then compensate automatically；Effective solution
In electricity consumption density biggish place, in the case where electrical network capacity is insufficient or three-phase imbalance, heavy-duty motor normally starts
The problem of, effectively raise the reliability of equipment.
Detailed description of the invention
Below with reference to embodiment and attached drawing, the present invention is described in detail, in which:
Fig. 1 is present pre-ferred embodiments circuit diagram；
Fig. 2 is control flow chart of the present invention；
Fig. 3 is present pre-ferred embodiments control flow chart.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is described in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, not
For limiting the present invention.
The invention discloses a kind of automatic compensation start-up circuit, referring to present pre-ferred embodiments circuit diagram shown in fig. 1,
Start-up circuit includes three-phase alternating current bus, to the single-phase compensation to the single-phase bus-bar collocation electric energy in three-phase alternating current bus
Capacitance group, to in three-phase alternating current bus three-phase bus compensation electric energy three-phase compensating capacitance group, to by three intersection
The power contactor KM1 and controller of galvanic electricity bus connection electrical equipment；The controller detects three-phase alternating current when starting
The general power P of bus, controlled in general power P deficiency entry condition single-phase compensating capacitance group and/or three-phase compensating capacitance group to
Three-phase alternating current bus-bar collocation electric energy controls power contactor KM1 conducting when general power P meets entry condition and is started.
The controller acquires each phase of three-phase alternating current bus by voltage sensor and current transformer (TA, TB, TC)
Voltage value U and current value I, and accordingly calculate three-phase alternating current bus general power P.
The single-phase compensating capacitance group includes three compensation branches, and a compensation branch is correspondingly connected with the three-phase alternating current
A phase line in bus；Every compensation branch includes at least concatenated single-phase switch (J), reactor L and capacitor C；The list
Mutually switch is controlled by the controller.Three single-phase switch can also can be acted together with single movement with 2 or 3.It is single-phase to open
Closing can realize that single-phase compensation is repaid when connecting.
In the preferred embodiment, the single-phase switch uses thyristor J.Compensation branch also concatenates fuse FU.Capacitor C is also
Indicator light in parallel, to indicate whether the capacitor is working.
The three-phase compensating capacitance group connects the three-phase alternating current bus comprising sequentially connected threephase switch, electricity
Anti- device group and capacitance group；The threephase switch is controlled by the controller.It may be noted that threephase switch is connect in three phase lines
's；Reactor group includes three reactors, and every phase line is connected a reactor；Capacitance group includes three capacitors, three electricity
Appearance can form delta connection (as shown in Figure 1) or form Y connection.Threephase switch can realize that three-phase is total when connecting
Compensation.Capacitor C indicator light also in parallel, to indicate whether the capacitor is working.
In the preferred embodiment, the threephase switch uses contactor KM.Fuse FU is also concatenated in three phase lines.
For the safety for improving start-up circuit, the three-phase alternating current bus connection three-phase charging bus, the single-phase benefit
It repays capacitance group and three-phase compensating capacitance group is connected in parallel on three-phase charging bus；The three-phase charging bus passes through the second breaker
The QF2 connection three-phase alternating current bus.The three-phase alternating current bus passes through the extraneous alternating current of the first circuit breaker Q F1 connection
Source.When equipment access alternating current is powered, circuit breaker Q F1 and QF2 are closed, the first circuit breaker Q F1 and the second circuit breaker Q F2 are disconnected
Road device carries electronic opening/closing operation mechanism, and automatic open and close may be implemented.
In the preferred embodiment, the electrical equipment is compressor.It may be noted that the present invention can be widely using to opening
It is needed when dynamic in the powerful equipment of high current, such as the compressor in air conditioner.Fig. 1 is that a single-phase compensation and three-phase are total
Signal is mended, actual needs can carry out the configuration of multiloop loop system according to the capacity of client's power supply and the parameter of compressor.
The invention discloses the control methods of above-mentioned automatic compensation start-up circuit comprising: to single-phase compensating capacitance group and
Three-phase compensating capacitance group charges simultaneously, and capacitor electricity is made to reach saturation；Acquire the voltage of each phase of three-phase alternating current bus
Value U and current value I, and the general power P of three-phase alternating current bus is calculated accordingly；According to the total work of three-phase alternating current bus when starting
Rate P controls single-phase compensating capacitance group and/or three-phase compensating capacitance group with the comparison result of electrical equipment rated power and intersects to three
Galvanic electricity bus-bar collocation electric energy.Single-phase compensating capacitance group and/or three-phase compensating capacitance group are controlled in general power P deficiency entry condition
To three-phase alternating current bus-bar collocation electric energy, electrical equipment starting is controlled when general power P meets entry condition.
Referring to Fig. 2, control method specifically includes the following steps:
Step 1. charges to single-phase compensating capacitance group with three-phase compensating capacitance group simultaneously (connects the first breaker in Fig. 1
QF1, the second circuit breaker Q F2, thyristor J and contactor KM), so that capacitor electricity is reached saturation state;
Step 2. acquires the voltage value U and current value I of each phase of three-phase alternating current bus, calculates three-phase alternating current according to formula P=UI
The general power P of bus；
Step 3. judges whether the general power P of three-phase alternating current bus is greater than N times of electrical equipment rated power, is to go to step 7
(starting), otherwise sequence executes (compensation electric energy)；
Step 4. by three-phase compensating capacitance group connect three-phase alternating current bus, to three-phase alternating current bus carry out discharging compensation (into
Row three-phase compensates entirely)；Disconnect single-phase compensating capacitance group；
Step 5. acquires the voltage value U and current value I of each phase of three-phase alternating current bus, calculates three-phase alternating current according to formula P=UI
The general power P of bus；
Step 6. judges whether the general power P of three-phase alternating current bus is greater than M times of electrical equipment rated power, is that then sequence executes
(terminate three-phase compensate entirely), otherwise go to step 4(and continue three-phase compensate entirely)；
Step 7. disconnects single-phase compensating capacitance group and three-phase compensating capacitance group and three-phase alternating current bus, by the three-phase alternating current goddess of lightning
Line connects electrical equipment, is allowed to start.
The control method of the preferred embodiment shown referring to Fig. 3, the step 7 specifically includes the following steps:
Step 7a. judges that the degree of balance of each phase power of three-phase alternating current bus is to go to step whether within the scope of the A% of permission
7c(three-phase equilibrium starts to start), otherwise sequence executes (making three-phase equilibrium)；
Step 7b. is corresponding to connect the minimum phase of power in three-phase alternating current bus for single-phase compensating capacitance group, to the minimum phase of power
Discharging compensation is carried out, 7a(is then gone to step and carries out three-phase equilibrium detection)；
Step 7c. disconnects single-phase compensating capacitance group and three-phase compensating capacitance group and three-phase alternating current bus, by three-phase alternating current
Bus connects electrical equipment, is allowed to start.
The value range of the N described in preferred embodiment is 115% to 85%；The value range of the M is 110% to 90%.Institute
The value range for stating A is ± 15.
The invention also discloses a kind of air conditioners comprising compressor, the compressor are opened using above-mentioned automatic compensation
Dynamic circuit.
The invention also discloses a kind of air conditioners comprising compressor, the compressor are opened using above-mentioned automatic compensation
The control method of dynamic circuit.
Above embodiments are by way of example only, non-to provide constraints.It is any without departing from the application spirit and scope, and to it
The equivalent modifications or change of progress, shall be included in the scope of claims of this application.
Claims (16)
1. a kind of automatic compensation start-up circuit, including three-phase alternating current bus, which is characterized in that further include to three-phase alternating current
The single-phase compensating capacitance group of single-phase bus-bar collocation electric energy in goddess of lightning's line, to in three-phase alternating current bus three-phase bus mend
Repay the three-phase compensating capacitance group of electric energy, the power contactor KM1 three-phase alternating current bus to be connected to electrical equipment and control
Device processed；
The general power P of the controller detection three-phase alternating current bus, controls single in general power P deficiency entry condition when starting
Phase compensating capacitance group and/or three-phase compensating capacitance group meet entry condition in general power P to three-phase alternating current bus-bar collocation electric energy
When control power contactor KM1 conducting started.
2. compensation start-up circuit as described in claim 1 automatic, which is characterized in that the controller by voltage sensor and
Current transformer acquires the voltage value U and current value I of each phase of three-phase alternating current bus, and calculates three-phase alternating current bus accordingly
General power P.
3. automatic compensation start-up circuit as described in claim 1, which is characterized in that the single-phase compensating capacitance group includes three
Branch is compensated, a compensation branch is correspondingly connected with a phase line in the three-phase alternating current bus；Every compensation branch is at least
Including concatenated single-phase switch, reactor and capacitor；The single-phase switch is controlled by the controller.
4. automatic compensation start-up circuit as claimed in claim 3, which is characterized in that the single-phase switch uses thyristor J.
5. automatic compensation start-up circuit as described in claim 1, which is characterized in that described in the three-phase compensating capacitance group connection
Three-phase alternating current bus comprising sequentially connected threephase switch, reactor group and capacitance group；The threephase switch is by the control
Device control processed.
6. automatic compensation start-up circuit as claimed in claim 5, which is characterized in that the threephase switch uses contactor KM.
7. automatic compensation start-up circuit as described in claim 1, which is characterized in that the three-phase alternating current bus connects three-phase
Charge bus, and the single-phase compensating capacitance group and three-phase compensating capacitance group are connected in parallel on three-phase charging bus；The three-phase charging
Bus passes through the second circuit breaker Q F2 connection three-phase alternating current bus.
8. automatic compensation start-up circuit as described in claim 1, which is characterized in that the three-phase alternating current bus passes through first
The extraneous AC power source of circuit breaker Q F1 connection.
9. automatic compensation start-up circuit as described in claim 1, which is characterized in that the electrical equipment is compressor.
10. compensating the control method of start-up circuit automatically as described in any one of claim 1 to 9, which is characterized in that single-phase benefit
It repays capacitance group and three-phase compensating capacitance group while charging, capacitor electricity is made to reach saturation；
The voltage value U and current value I of each phase of three-phase alternating current bus are acquired, and calculates the general power of three-phase alternating current bus accordingly
P；
Single-phase compensating capacitance group and/or three-phase compensating capacitance group are controlled to three-phase alternating current in general power P deficiency entry condition
Bus-bar collocation electric energy controls electrical equipment starting when general power P meets entry condition.
11. the control method of automatic compensation start-up circuit as claimed in claim 10, which is characterized in that the control method tool
Body the following steps are included:
Step 1. charges simultaneously to single-phase compensating capacitance group and three-phase compensating capacitance group, and capacitor electricity is made to reach saturation shape
State;
Step 2. acquires the voltage value U and current value I of each phase of three-phase alternating current bus, calculates three-phase alternating current according to formula P=UI
The general power P of bus；
Step 3. judges whether the general power P of three-phase alternating current bus is greater than N times of electrical equipment rated power, is to go to step 7,
Otherwise sequence executes；
Three-phase compensating capacitance group is connected three-phase alternating current bus by step 4., carries out discharging compensation to three-phase alternating current bus；It is disconnected
Open single-phase compensating capacitance group；
Step 5. acquires the voltage value U and current value I of each phase of three-phase alternating current bus, calculates three-phase alternating current according to formula P=UI
The general power P of bus；
Step 6. judges whether the general power P of three-phase alternating current bus is greater than M times of electrical equipment rated power, is sequentially to hold
Row, otherwise goes to step 4；
Step 7. disconnects single-phase compensating capacitance group and three-phase compensating capacitance group and three-phase alternating current bus, by the three-phase alternating current goddess of lightning
Line connects electrical equipment, is allowed to start.
12. the control method of automatic compensation start-up circuit as claimed in claim 11, which is characterized in that the step 7 is specific
The following steps are included:
Step 7a. judges that the degree of balance of each phase power of three-phase alternating current bus is to go to step whether within the scope of the A% of permission
7c, otherwise sequence executes；
Step 7b. is corresponding to connect the minimum phase of power in three-phase alternating current bus for single-phase compensating capacitance group, to the minimum phase of power
Discharging compensation is carried out, 7a is then gone to step；
Step 7c. disconnects single-phase compensating capacitance group and three-phase compensating capacitance group and three-phase alternating current bus, by three-phase alternating current
Bus connects electrical equipment, is allowed to start.
13. the control method of automatic compensation start-up circuit as claimed in claim 11, which is characterized in that the value model of the N
Enclose is 115% to 85%；The value range of the M is 110% to 90%.
14. the control method of automatic compensation start-up circuit as claimed in claim 12, which is characterized in that the value model of the A
Enclose is ± 15.
15. a kind of air conditioner, including compressor, which is characterized in that the compressor is using described in any one of claim 1 to 9
Automatic compensation start-up circuit.
16. a kind of air conditioner, including compressor, which is characterized in that the compressor is using any one of claim 10 to 14 institute
The control method for the automatic compensation start-up circuit stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910723188.5A CN110360730A (en) | 2019-08-06 | 2019-08-06 | Automatic compensation start-up circuit and its control method and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910723188.5A CN110360730A (en) | 2019-08-06 | 2019-08-06 | Automatic compensation start-up circuit and its control method and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110360730A true CN110360730A (en) | 2019-10-22 |
Family
ID=68223279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910723188.5A Pending CN110360730A (en) | 2019-08-06 | 2019-08-06 | Automatic compensation start-up circuit and its control method and air conditioner |
Country Status (1)
| Country | Link |
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| CN (1) | CN110360730A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854414A (en) * | 1981-09-26 | 1983-03-31 | Mitsubishi Electric Corp | Countermeasure system for voltage variation |
| CN2652008Y (en) * | 2003-10-18 | 2004-10-27 | 陈鹤 | Idle in situ compensator of motor |
| CN201797473U (en) * | 2010-07-09 | 2011-04-13 | 武汉理工大学 | Reactive compensation soft start device based on variable reactance |
| CN203039367U (en) * | 2012-12-30 | 2013-07-03 | 四川德胜集团钢铁有限公司 | Low pressure filtering reactive compensation circuit structure |
| CN105510515A (en) * | 2015-08-26 | 2016-04-20 | 常州大学 | Neutralization sulphur meter with function of automatic drying |
-
2019
- 2019-08-06 CN CN201910723188.5A patent/CN110360730A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5854414A (en) * | 1981-09-26 | 1983-03-31 | Mitsubishi Electric Corp | Countermeasure system for voltage variation |
| CN2652008Y (en) * | 2003-10-18 | 2004-10-27 | 陈鹤 | Idle in situ compensator of motor |
| CN201797473U (en) * | 2010-07-09 | 2011-04-13 | 武汉理工大学 | Reactive compensation soft start device based on variable reactance |
| CN203039367U (en) * | 2012-12-30 | 2013-07-03 | 四川德胜集团钢铁有限公司 | Low pressure filtering reactive compensation circuit structure |
| CN105510515A (en) * | 2015-08-26 | 2016-04-20 | 常州大学 | Neutralization sulphur meter with function of automatic drying |
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Application publication date: 20191022 |