CN202616141U

CN202616141U - Alternating current contactor of low-voltage alternating current control loop

Info

Publication number: CN202616141U
Application number: CN 201220307162
Authority: CN
Inventors: 张勇
Original assignee: XI'AN RUNHUI TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: XI'AN RUNHUI TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2012-06-28
Filing date: 2012-06-28
Publication date: 2012-12-19
Anticipated expiration: 2022-06-28

Abstract

The utility model relates to an alternating current contactor when a power source is abnormal, in particular to the alternating current contactor of a low-voltage alternating current control loop. The alternating current contactor comprises a loop control switch, a starting run switch, a current output control unit, a direct-current electrical source converting unit, an energy storage unit, a central control unit and an electric device. The low-voltage alternating current voltage end L is in electric connection with a loop control switch K1 through a self-provided switch circuit of the electric device, and the self-provided switch circuit is in parallel connection with the starting run switch. One voltage detecting end of the central control unit is in electric connection with the voltage end B of the direct-current electrical source converting unit, and the other voltage detecting end of the central control unit is in electric connection with the alternating current input voltage end A. The voltage end A and the voltage end B are arranged at two ends of the self-provided switch circuit, and the central control unit is in electric connection with the loop control switch, the starting run switch and the energy storage unit. The alternating current contactor can automatically adjust the work state of the electric device and ensure normal running of a production technology process.

Description

A.C. contactor in the low-voltage alternating-current control loop

Technical field

The utility model relates to A.C. contactor when abnormity of power supply, particularly A.C. contactor in the 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 utility model 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 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 utility model 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 is electrically connected through the K1 that provides switching circuit and circuit controls switch for oneself of power consumption equipment, provides switching circuit for oneself and is connected to the startup run switch; Central control unit one tunnel voltage detecting end is electrically connected with DC power supply converting unit voltage end B; Another road voltage detecting end is electrically connected with AC-input voltage end A; Voltage end A and voltage end B are providing the switching circuit two ends for oneself; Central control unit is electrically connected with circuit controls control switch, startup run switch respectively, energy-storage units is electrically connected.

Described energy-storage units is the storage battery that is serially connected with gate-controlled switch.

Described DC power supply converting unit is the AC/DC Switching Power Supply.

Described central control unit is the processor that has the a/d transducer.

The utility model has the advantages that: the A.C. contactor intelligence control method of the utility model is because can be according to the electric power system voltage fluctuation; Automatically adjust the operating state (continuing operation or out of service) of power consumption equipment; When power-supply fluctuation; Power consumption equipment is run well, 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 utility model is further specified.

Fig. 1 is the circuit theory diagrams of the utility model embodiment;

Fig. 2 is the practical application figure of the utility model.

Among Fig. 1,1, 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 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 voltage end B, 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 energy-storage units 6 voltages output 5.

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 utility model 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

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 is electrically connected through the K1 that provides switching circuit and circuit controls switch (2) for oneself of power consumption equipment (1), provides switching circuit for oneself and be connected to start run switch (3); Central control unit (7) one tunnel voltage detecting ends are electrically connected with DC power supply converting unit (5) voltage end B; Another road voltage detecting end is electrically connected with AC-input voltage end A; 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 control switch (2), startup run switch (3) respectively, energy-storage units (6) is electrically connected.

2. A.C. contactor in the low-voltage alternating-current control loop according to claim 1 is characterized in that: described energy-storage units (6) is the storage battery that is serially connected with gate-controlled switch.

3. A.C. contactor in the low-voltage alternating-current control loop according to claim 1 is characterized in that: described DC power supply converting unit (5) is the AC/DC Switching Power Supply.

4. A.C. contactor in the low-voltage alternating-current control loop according to claim 1 is characterized in that: described central control unit (7) is the processor that has the a/d transducer.