CN102709116A - Alternating-current contactor in low-voltage alternating-current control circuit and control method of alternating-current contactor - Google Patents
Alternating-current contactor in low-voltage alternating-current control circuit and control method of alternating-current contactor Download PDFInfo
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- CN102709116A CN102709116A CN2012102173487A CN201210217348A CN102709116A CN 102709116 A CN102709116 A CN 102709116A CN 2012102173487 A CN2012102173487 A CN 2012102173487A CN 201210217348 A CN201210217348 A CN 201210217348A CN 102709116 A CN102709116 A CN 102709116A
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Abstract
The invention particularly relates to an alternating-current contactor in a low-voltage alternating-current control circuit and a control method of the alternating-current contactor. The alternating-current contactor comprises a circuit control switch, a starting run switch, a current output control unit, a direct-current power supply conversion unit, an energy storage unit, a central control unit and electric equipment, wherein a low-voltage alternating-current voltage end L is electrically connected with a K1 of the circuit control unit through an auxiliary switch circuit of the electric equipment; the auxiliary switch circuit is connected in parallel with the starting run switch; a one voltage detection end of the central control unit is electrically connected with the direct-current power supply conversion unit; another voltage detection end of the central control unit is electrically connected with an alternating-current output voltage end A; the voltage end A and a voltage end B are arranged at the two ends of the auxiliary switch circuit; and the central control unit is electrically connected with the circuit control switch, the starting run switch and the energy storage unit respectively. The working state of the electric equipment can be adjusted automatically, and the normal operation of the production process flow is ensured.
Description
Technical field
The present invention relates to A.C. contactor and control method in the A.C. contactor intelligence control method when abnormity of power supply, particularly low-voltage alternating-current control loop.
Background technology
Use control elements such as A.C. contactors in the Industry Control loop in a large number, when abnormity of power supply, can cause A.C. contactor to thread off, influence the normal operation of control loop.Be in control loop, to insert anti-shake electricity accessory power supply module to prevent that power-supply fluctuation from restart A.C. contactor to the influence of A.C. contactor or when the power up at present; These control modes have only been considered the work of A.C. contactor self; Do not consider the influence of A.C. contactor, do not consider how to ensure to greatest extent the normal operation of production process yet from the production technology aspect to whole electric power system.The A.C. contactor intelligence control method; But but when system's tolerance range and time when abnormity of power supply; Rely on the energy of inner electric capacity or battery storage to continue to offer direct current energy, make A.C. contactor maintenance work, guarantee that power consumption equipment normally moves to A.C. contactor; When but supply voltage surpasses system's tolerance range and time, stop to make A.C. contactor out of service, when preventing power up electric power system is impacted to the A.C. contactor power supply; Out of service because of power-supply fluctuation like A.C. contactor, power up is when allowing operating voltage in the time range that allows, and the A.C. contactor that resets automatically again operation is resumed work power consumption equipment fast.And anti-shake electricity accessory power supply module or Restarter are only considered local condition of work, but because power-supply fluctuation degree difference big (from 0%-80%Ue) is many as inserting anti-shake electricity accessory power supply module; The large number quipments low-voltage continues operation when voltage is low; Excessive during power up to system shock, possibly cause power supply because of the protection action has a power failure, result in greater loss; As surpassing power system capacity, also can influence the safety of electric power system; If it is few to insert anti-shake electricity accessory power supply module, it is few when voltage is high, to continue operational outfit, causes very big waste again, can not guarantee the normal operation of technological process to greatest extent; And Restarter can not keep A.C. contactor work when abnormity of power supply, and equipment is out of service, and technological process is interrupted, restarts to lose meaning.
Summary of the invention
The present invention provide a kind of can be according to the change in voltage situation when abnormity of power supply; Automatically adjust the power consumption equipment operating state; Keep to greatest extent A.C. contactor not out of service with the normal operation that guarantees the technological process of production and to the impact of system in allowed band, can make A.C. contactor and control method in the low-voltage alternating-current control loop that A.C. contactor out of service reworks automatically again when voltage recovers.
The technical scheme that the present invention adopted is: A.C. contactor in the low-voltage alternating-current control loop; It is characterized in that: comprise the circuit controls switch, start run switch, electric current output control unit, DC power supply converting unit, energy-storage units, central control unit, power consumption equipment; Low-voltage ac voltage end L provides switching circuit for oneself and is connected to run switch through the two ends that a way switch K1 who provides switching circuit and circuit controls switch for oneself of power consumption equipment is carried in power consumption equipment; Central control unit one tunnel voltage detecting end is electrically connected with the DC power supply converting unit, is used to detect the voltage of input B; Another road is electrically connected with AC-input voltage end A, is used to detect the voltage of AC-input voltage end A, and voltage end A and voltage end B are providing the switching circuit two ends for oneself; Central control unit is electrically connected with the circuit controls switch, is used for the switching of control loop control switch K1 and K2; Central control unit is electrically connected with starting run switch, is used to start run switch control contact E1, E2 closure or disconnection; Central control unit is electrically connected with energy-storage units, is used to control the output of energy-storage units voltage.
Described DC power supply converting unit will convert low-voltage DC to from the low-voltage AC of L end; Charge to energy-storage units through DC power supply converting unit output; Energy-storage units is electrically connected with the end of K1 in the circuit controls switch through the electric current output control unit, supplies power to power consumption equipment through energy-storage units.
The control method of A.C. contactor in the low-voltage alternating-current control loop; It is characterized in that: the way switch K1 that low-voltage ac voltage end L, N provide switching circuit, circuit controls switch for oneself through power consumption equipment is carried in the A1 and the A2 two ends of power consumption equipment, supplies power to power consumption equipment:
When A, power supply operate as normal, the normally closed switch TSB that provides for oneself in the switching circuit is closed, K switch 1 conducting of central control unit control loop control switch; Not conducting of K2; Start and once provide the QSB switch in the switching circuit for oneself, low-voltage AC moment conducting is carried on the power consumption equipment, and the A.C. contactor KM two contact KM that provide for oneself in the switching circuit are connected; Power consumption equipment operate as normal, central control unit get into providing the detection of switching circuit voltage for oneself;
B, low-voltage ac voltage are greater than the first voltage set point V1, and power supply is a normal working voltage, and central control unit does not respond;
C, when low-voltage ac voltage greater than the second voltage set point V2, less than the first voltage set point V1, power supply is fluctuation operating voltage, central control unit response, K switch 2 conductings of central control unit control loop control switch, not conducting of K1;
D, when low-voltage ac voltage less than the second voltage set point V2; Power supply is an irregular working voltage, central control unit response, K switch 1 conducting of central control unit control loop control switch; Not conducting of K2, the energy-storage units output voltage is turn-offed in central control unit control simultaneously;
E, after low-voltage AC is less than the second voltage set point V2, A.C. contactor KM two contacts of providing for oneself in the switching circuit because of voltage is low are broken off, low-voltage ac voltage stops to supply power to power consumption equipment;
F, central control unit detect the B point voltage, when in setting-up time T, recovering just often, during just greater than the first voltage set point V1; Central control unit control switch K1 conducting; Not conducting of K2, the contact E1, the E2 that start run switch connect, and get into new normal operating conditions again.
The described first voltage set point V1 is 80% of a standard operation voltage.
The described second voltage set point V2 confirms that according to power system capacity setting range is the 0%-80% of standard operation voltage.
Described standard operation voltage is 220V/380V.
Described setting-up time T scope is 0-10 second.
Advantage of the present invention is: A.C. contactor intelligence control method in the low-voltage alternating-current control loop; Comprise the circuit controls switch, start run switch, electric current output control unit, DC power supply converting unit, energy-storage units, central control unit, power consumption equipment (like A.C. contactor KM etc.); Low-voltage ac voltage end A is carried in the two ends of power consumption equipment through a way switch K1 of circuit controls switch; Power consumption equipment is electrically connected with the output of electric current output control unit through another way switch K2 of circuit controls switch simultaneously; The input of electric current output control unit is electrically connected with DC power supply converting unit output, and DC power supply converting unit output is electrically connected with the energy-storage units charging end simultaneously.The voltage range that can bear when power-supply fluctuation but in electric power system and in the time is then broken off original current supply circuit, is supplied power to it by energy-storage units, keeps A.C. contactor and runs well; Can bear voltage range and time if power-supply fluctuation exceeds system, break off the energy storage current supply circuit by control switch again, change, make A.C. contactor out of service because of brownout by original current supply circuit power supply; If A.C. contactor because of power-supply fluctuation out of service after, power supply recovers again normally in the time of setting, central control unit 7 is according to the delay time of setting, the contact E1 of control startup run switch, E2 closure through the time-delay back, the work of startup A.C. contactor.When the former control end A of power consumption equipment (A.C. contactor KM) breaks off, break off the energy storage current supply circuit by control switch, change by former ac power supply circuit power supply, to reach the purpose that stops.Break off original current supply circuit during the A.C. contactor operate as normal; Provide DC power supply to reach purpose of energy saving by DC power supply converting unit and electric current output control unit to A.C. contactor; The voltage range that can bear when power-supply fluctuation but in electric power system and in the time continues power supply by energy-storage units; Can bear voltage range and time if power-supply fluctuation exceeds system, break off direct current power supply loop, change, make A.C. contactor out of service because of brownout by former ac power supply circuit power supply by control switch; If A.C. contactor because of power-supply fluctuation out of service after, voltage recovers again normally in the time of setting, central control unit 7 is according to the delay time of setting, the contact E1 of control startup run switch, E2 closure through the time-delay back, the work of startup A.C. contactor.When the former control end A of power consumption equipment broke off, control switch broke off the energy storage current supply circuit, changeed by former ac power supply circuit power supply, to reach the purpose that stops.
A.C. contactor intelligence control method of the present invention is because can be according to the electric power system voltage fluctuation; Automatically the operating state of adjustment power consumption equipment (continuing operation or out of service) when power-supply fluctuation, can make power consumption equipment run well to greatest extent; Make the technological process of production unaffected; Can the safety of electric power system not exerted an influence again, can also start the power consumption equipment work that has stopped fast during power up, guarantee the continuous running of the technological process of production to greatest extent.
Description of drawings
Below in conjunction with accompanying drawing and instance the present invention is further specified.
Fig. 1 is the circuit theory diagrams of the embodiment of the invention;
Fig. 2 is practical application figure of the present invention.
Among the figure, 1, power consumption equipment; 2, circuit controls switch; 3, start run switch; 4, electric current output control unit; 5, DC power supply converting unit; 6, energy-storage units; 7, central control unit.In the frame of broken lines is the control section of A.C. contactor KM, and QSB is a start button, and TSB is a stop button.
Embodiment
As shown in Figure 1; A.C. contactor intelligence control method in the low-voltage alternating-current control loop; Comprise circuit controls switch 2, start run switch 3, electric current output control unit 4, DC power supply converting unit 5, energy-storage units 6, central control unit 7, power consumption equipment 1; Low-voltage ac voltage end L provides switching circuit for oneself and is connected to run switch 3 through the two ends that a way switch K1 who provides switching circuit (A.C. contactor KM) and control switch 2 for oneself of power consumption equipment 1 is carried in power consumption equipment 1; Central control unit 7 one tunnel voltage detecting ends are electrically connected with DC power supply converting unit 5, are used to detect the voltage of input B; Another road is electrically connected with AC-input voltage end A, is used to detect the voltage of AC-input voltage end A, and voltage end A and voltage end B are providing the switching circuit two ends for oneself; Central control unit 7 is electrically connected with circuit controls switch 2, is used for the switching of control loop control switch 2 K1 and K2; Central control unit 7 is electrically connected with starting run switch 3, is used to start run switch 3 control contact E1, E2 closure or disconnection; Central control unit 7 is electrically connected with energy-storage units 6, is used to control the output of energy-storage units 6 voltages.
DC power supply converting unit 5 will convert low-voltage DC to from the low-voltage AC of L end; Charge to energy-storage units 6 through DC power supply converting unit 5 outputs; Energy-storage units 6 is electrically connected with the end of K2 in the circuit controls switch 2 through electric current output control unit 4, supplies power to power consumption equipment 1 through energy-storage units 6.
Energy-storage units 6 is the storage batterys that are serially connected with gate-controlled switch, and DC power supply converting unit 5 is AC/DC Switching Power Supplies, and centre control unit 7 is the processors that have the a/d transducer.
During real work, the way switch K1 that low-voltage ac voltage end L, N provide switching circuit, circuit controls switch 2 for oneself through power consumption equipment 1 is carried in the A1 and the A2 two ends of power consumption equipment 1, to power consumption equipment 1 power supply:
When A, power supply operate as normal, the normally closed switch TSB that provides for oneself in the switching circuit is closed, K switch 1 conducting of central control unit 7 control loop control switchs 2; Not conducting of K2; Start and once provide the QSB switch in the switching circuit for oneself, low-voltage AC moment conducting is carried on the power consumption equipment 1, and the A.C. contactor KM two contact KM that provide for oneself in the switching circuit are connected; Power consumption equipment 1 operate as normal, central control unit 7 gets into providing the detection of switching circuit voltage for oneself;
B, low-voltage ac voltage are greater than the first voltage set point V1, and power supply is a normal working voltage, and central control unit 7 does not respond;
C, when low-voltage ac voltage greater than the second voltage set point V2, less than the first voltage set point V1, power supply is the fluctuation operating voltage, central control unit 7 response, K switch 2 conductings of central control unit 7 control loop control switchs 2, not conducting of K1,
D, when low-voltage ac voltage less than the second voltage set point V2; Power supply is an irregular working voltage, central control unit 7 responses, K switch 1 conducting of central control unit 7 control loop control switchs 2; Not conducting of K2, energy-storage units 6 output voltages are turn-offed in central control unit 7 controls simultaneously;
E, after low-voltage AC is less than the second voltage set point V2, A.C. contactor KM two contacts of providing for oneself in the switching circuit because of voltage is low are broken off, low-voltage ac voltage stops to power consumption equipment 1 power supply;
F, central control unit 7 detect the B point voltage, when in setting-up time T, recovering just often, during just greater than the first voltage set point V1; Central control unit 7 control switch K1 conductings; Not conducting of K2, the contact E1, the E2 that start run switch 3 connect, and get into new normal operating conditions again.
The described first voltage set point V1 is 80% of a standard operation voltage.
The described second voltage set point V2 confirms that according to power system capacity setting range is the 0%-80% of standard operation voltage.
Standard operation voltage is the nominal value (220V/380V) of low-voltage ac voltage.
Setting-up time T scope is generally 0-10 second, sets according to field demand.
The present invention is designed to modular structure in implementing, and like the MC1 among Fig. 2, it has 7 tie points, low-voltage ac voltage end L, N, the power end A1 and the A2 of power consumption equipment, and the A of control switch 2 end, the contact E1 and the E2 of startup run switch.The power end A1 of power consumption equipment and A2 are electrically connected with the A1 and the A2 of power consumption equipment; L, N are electrically connected with L, the N of alternating voltage; The A end of control switch 2 is electrically connected with the A end of control loop, and the contact E1, the E2 end that start run switch 3 are electrically connected with the start button two ends of power consumption equipment.
Parts that present embodiment is not described in detail and structure belong to well-known components and the common structure or the conventional means of the industry, here not narration one by one.
Claims (7)
1. A.C. contactor in the low-voltage alternating-current control loop; It is characterized in that: comprise circuit controls switch (2), start run switch (3), electric current output control unit (4), DC power supply converting unit (5), energy-storage units (6), central control unit (7), power consumption equipment (1); Low-voltage ac voltage end L provides switching circuit for oneself and is connected to run switch (3) through the two ends that a way switch K1 who provides switching circuit and circuit controls switch (2) for oneself of power consumption equipment (1) is carried in power consumption equipment (1); Central control unit (7) one tunnel voltage detecting ends are electrically connected with DC power supply converting unit (5), are used to detect the voltage of input B; Another road is electrically connected with AC-input voltage end A, is used to detect the voltage of AC-input voltage end A, and voltage end A and voltage end B are providing the switching circuit two ends for oneself; Central control unit (7) is electrically connected with circuit controls switch (2), is used for the switching of control loop control switch (2) K1 and K2; Central control unit (7) is electrically connected with starting run switch (3), is used to start run switch (3) control contact E1, E2 closure or disconnection; Central control unit (7) is electrically connected with energy-storage units (6), is used to control the output of energy-storage units (6) voltage.
2. A.C. contactor in the low-voltage alternating-current control loop according to claim 1; It is characterized in that: described DC power supply converting unit (5) will convert low-voltage DC to from the low-voltage AC of L end; Charge to energy-storage units (6) through DC power supply converting unit (5) output; Energy-storage units (6) is electrically connected with the end of K2 in the circuit controls switch (2) through electric current output control unit (4), supplies power to power consumption equipment (1) through energy-storage units (6).
3. the control method of A.C. contactor in the low-voltage alternating-current control loop; It is characterized in that: the way switch K1 that low-voltage ac voltage end L, N provide switching circuit, circuit controls switch (2) for oneself through power consumption equipment (1) is carried in the A1 and the A2 two ends of power consumption equipment (1), supplies power to power consumption equipment (1):
When A, power supply operate as normal, the normally closed switch TSB that provides for oneself in the switching circuit is closed, K switch 1 conducting of central control unit (7) control loop control switch (2); Not conducting of K2; Start and once provide the QSB switch in the switching circuit for oneself, low-voltage AC moment conducting is carried on the power consumption equipment (1), and the A.C. contactor KM two contact KM that provide for oneself in the switching circuit are connected; Power consumption equipment (1) operate as normal, central control unit (7) get into providing the detection of switching circuit voltage for oneself;
B, low-voltage ac voltage are greater than the first voltage set point V1, and power supply is a normal working voltage, and central control unit (7) does not respond;
C, when low-voltage ac voltage greater than the second voltage set point V2; Less than the first voltage set point V1, power supply is fluctuation operating voltage, central control unit (7) response; K switch 2 conductings of central control unit (7) control loop control switch (2), not conducting of K1;
D, when low-voltage ac voltage less than the second voltage set point V2; Power supply is an irregular working voltage; Central control unit (7) response; K switch 1 conducting of central control unit (7) control loop control switch (2), not conducting of K2, energy-storage units (6) output voltage is turn-offed in central control unit (7) control simultaneously;
E, after low-voltage AC is less than the second voltage set point V2, A.C. contactor KM two contacts of providing for oneself in the switching circuit because of voltage is low are broken off, low-voltage ac voltage stops to supply power to power consumption equipment (1);
F, central control unit (7) detect the B point voltage; When in setting-up time T, recovering just often; During just greater than the first voltage set point V1, central control unit (7) control switch K1 conducting, not conducting of K2; The contact E1, the E2 that start run switch (3) connect, and get into new normal operating conditions again.
4. the control method of A.C. contactor in the low-voltage alternating-current control loop according to claim 3 is characterized in that: the described first voltage set point V1 is 80% of a standard operation voltage.
5. the control method of A.C. contactor in the low-voltage alternating-current control loop according to claim 3 is characterized in that: the described second voltage set point V2 confirms that according to power system capacity setting range is the 0%-80% of standard operation voltage.
6. the control method of A.C. contactor in the low-voltage alternating-current control loop according to claim 4 is characterized in that: described standard operation voltage is 220V/380V.
7. the control method of A.C. contactor in the low-voltage alternating-current control loop according to claim 3 is characterized in that: described setting-up time T scope is 0-10 second.
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| CN201210217348.7A CN102709116B (en) | 2012-06-28 | 2012-06-28 | Alternating-current contactor in low-voltage alternating-current control circuit and control method of alternating-current contactor |
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| CN201210217348.7A CN102709116B (en) | 2012-06-28 | 2012-06-28 | Alternating-current contactor in low-voltage alternating-current control circuit and control method of alternating-current contactor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103280380A (en) * | 2013-06-18 | 2013-09-04 | 西安润辉科技发展有限公司 | Intelligent power control system of alternating current contactor |
| CN103560476A (en) * | 2013-11-22 | 2014-02-05 | 珠海万力达电气股份有限公司 | Anti-interference electricity module in bypass mode and control method of anti-interference electricity module |
| CN103618282A (en) * | 2013-11-26 | 2014-03-05 | 江苏国网自控科技股份有限公司 | Intelligent tripping control system and method of anti-interference module |
| CN103633860A (en) * | 2013-11-26 | 2014-03-12 | 江苏国网自控科技股份有限公司 | Adaptive control system and control method of anti-interference electricity device |
| CN103904984A (en) * | 2014-04-01 | 2014-07-02 | 西安润辉科技发展有限公司 | Interference electricity preventing electromotor intelligent managing device and method |
| CN111953236A (en) * | 2020-08-17 | 2020-11-17 | 中石化南京工程有限公司 | Circuit for preventing contactor release caused by starting of motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103618282B (en) * | 2013-11-26 | 2016-03-16 | 江苏国网自控科技股份有限公司 | The intelligent trip control system of voltage shock avoiding module and control method thereof |
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| CN103904984A (en) * | 2014-04-01 | 2014-07-02 | 西安润辉科技发展有限公司 | Interference electricity preventing electromotor intelligent managing device and method |
| CN103904984B (en) * | 2014-04-01 | 2016-07-06 | 西安润辉科技发展有限公司 | A kind of voltage shock avoiding motor intelligent manager and method |
| CN111953236A (en) * | 2020-08-17 | 2020-11-17 | 中石化南京工程有限公司 | Circuit for preventing contactor release caused by starting of motor |
| CN111953236B (en) * | 2020-08-17 | 2022-08-30 | 中石化南京工程有限公司 | Circuit for preventing contactor release caused by starting of motor |
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