CN205280830U

CN205280830U - Three phase current phase sequence and open -phase detecting circuit for electric actuator

Info

Publication number: CN205280830U
Application number: CN201521125934.4U
Authority: CN
Inventors: 彭仁坤; 邵杰; 赵晶晶; 肖伯乐; 李玉杰
Original assignee: POWER STATION AUXILIARY MACHINERY GENERAL PLANT CO Ltd CHANGZHOU; Shanghai Power Equipment Research Institute Co Ltd
Current assignee: Changzhou power station auxiliary Limited by Share Ltd; Shanghai Power Equipment Research Institute Co Ltd
Priority date: 2015-12-31
Filing date: 2015-12-31
Publication date: 2016-06-01
Anticipated expiration: 2025-12-31

Abstract

The utility model relates to a three -phase electricity technical field, specifically speaking is a three phase current phase sequence and open -phase detecting circuit for electric actuator, mainly by half -wave rectifier circuit, current -limiting circuit, chronogenesis competition circuit, the even buffer circuit of light, charging and discharging circuit, switch circuit constitute, the utility model discloses the winding displacement is rational in infrastructure, and sensitivity is high, and microcomputer control is adopted in the stable performance, then makes detection circuitry have good scalability, if a certain load system need increase some observing and controlling function, and the general hardware that only needs to increase the few, it can conveniently achieve the goal to change software even.

Description

A kind of electric operator three-phase power supply phase sequence and lack detection circuit

Technical field

This utility model relates to three-phase electricity technical field, specifically, is a kind of electric operator three-phase power supply phase sequence and lack detection circuit.

Background technology

Three phase electric equipment phase sequence when phase power failure causes phase shortage or uses is wrong, generally all can affect its normal operation, equipment fault can be caused time serious even to damage. The main contents that three phase mains is controlled include two parts, and the phase sequence of the three phase mains that will enter load is tested when being start by one, and two is, in loaded work piece process, each of three phase mains is carried out omnidistance phase shortage monitoring mutually. Harmful effect to equipment when considering phase power supply irregular working; electrical equipment generally has some precautionary measures; but these measures are generally straightforward, it is slow to respond when power failure, and detecting element is not accurate enough in addition; Adjustment precision is relatively low; it is convenient not to operate, and its protected effect is not ideal enough, and after fault occurs; owing to general device fault-free indicates, overhaul also not very convenient. Additionally, whether phase sequence cannot correctly be made instruction or be automatically performed the change of phase sequence by common protection circuit, for there being the load of fixing phase sequence, if phase sequence is wrong, cannot normal operation or cause the accident. In order to determine phase sequence, the load being power with three phase alternating current motor, generally first three phase mains is connect people's load, then observe motor turn to determine the positive and negative of phase sequence. Additionally also contemplate for determining phase sequence with multitrace oscilloscope, this method is also suitable for other load not allowing power phase wrong, but these methods are all cumbersome or less safe, what have also needs special equipment, instrument and equipment for some frequent changes places to use, if all need to determine phase sequence before using, it is clear that be an extremely onerous thing every time.

The circuit of testing the phase sequence of early stage is made up of electric capacity, resistance, although simple in construction, but capacitance is relatively big, indicates with display lamp, and power consumption is relatively big, and volume is also big, also needs the brightness of artificial cognition lamp, and can not realize automatic detection.

Summary of the invention

The purpose of this utility model is just to provide a kind of low cost, low-power consumption, can monitor phase shortage and detection phase sequence and can make the circuit of testing the phase sequence of corresponding instruction.

To achieve these goals, a kind of electric operator three-phase power supply phase sequence that this utility model relates to and lack detection circuit, including chip J1 and chip J2, testing circuit includes half-wave rectifying circuit, current-limiting circuit and optical coupling isolation circuit, half-wave rectifying circuit is connected 1 diode respectively by two pins of chip J1 and 3 resistor coupled in parallel form, current-limiting circuit is formed by 2 and 2 resistor coupled in parallel, optical coupling isolation circuit is by 1 photoelectric coupling circuit, 1 electrostatic capacitance, 3 resistance are formed by connecting, electrostatic capacitance is connected to the vb-pin of chip J2, resistance is connected to the 24vb pin of chip J1, half-wave rectifying circuit, sequential competition circuit is connected and composed by NPC audion between current-limiting circuit and optical coupling isolation circuit.

Further improvement of the utility model, also includes charge-discharge circuit and on-off circuit, and charge-discharge circuit is connected to NPC transistor collector by chip through XXJC pin, exports from NPC triode emission level high voltage through amplifying.

Further improvement of the utility model, half-wave rectifying circuit and the resistance in current-limiting circuit are 51K ohm, and the resistance in optical coupling isolation circuit is 24K ohm.

Further improvement of the utility model, the diode in circuit adopts IN4007 diode, and NPC transistor collector adopts 2N5551 audion.

The beneficial effects of the utility model are: this utility model bus-bar construction is reasonable, highly sensitive, stable performance, employing microcomputer controls, testing circuit is then made to there is good extensibility, if a certain load system need to increase some observing and controlling function, general need to increase little hardware, and even changing software can achieve the goal easily.

Accompanying drawing explanation

Fig. 1 is this utility model Phase sequence detection modular structure schematic diagram,

Fig. 2 is this utility model testing circuit schematic diagram.

Fig. 3 is the continuous figure of Fig. 1.

Wherein, contact D, E, F, the G in Fig. 2 is connected to contact D, E, F, the G in Fig. 3.

Detailed description of the invention

In order to deepen understanding of the present utility model, below in conjunction with drawings and Examples, this utility model being described in further detail, this embodiment is only used for explaining this utility model, protection domain of the present utility model is not constituted and limits.

Such as Fig. 1, shown in Fig. 2 and Fig. 3, a kind of electric operator three-phase power supply phase sequence and lack detection circuit, including chip J1 and chip J2, testing circuit includes half-wave rectifying circuit, current-limiting circuit and optical coupling isolation circuit, half-wave rectifying circuit is connected 1 diode respectively by two pins of chip J1 and 3 resistor coupled in parallel form, current-limiting circuit is formed by 2 and 2 resistor coupled in parallel, optical coupling isolation circuit is by 1 photoelectric coupling circuit, 1 electrostatic capacitance, 3 resistance are formed by connecting, electrostatic capacitance is connected to the vb-pin of chip J2, resistance is connected to the 24vb pin of chip J1, half-wave rectifying circuit, sequential competition circuit is connected and composed by NPC audion between current-limiting circuit and optical coupling isolation circuit, also include charge-discharge circuit and on-off circuit, charge-discharge circuit is connected to NPC transistor collector by chip through XXJC pin, export from NPC triode emission level high voltage through amplifying.

In the present embodiment, half-wave rectifying circuit and the resistance in current-limiting circuit are 51K ohm, and the resistance in optical coupling isolation circuit is 24K ohm; Diode in circuit adopts IN4007 diode, and NPC transistor collector adopts 2N5551 audion.

Each circuit element connected mode of the present embodiment is as follows: power supply is provided by chip J2 and is connected to NPC audion Q15 colelctor electrode through XXJC pin, export through amplifying the emitting stage high voltage from Q15, one tunnel carries out low level output through NPC audion Q1, resistance R23 simultaneously, R29 and electrostatic capacitance C5 forms gain feedback circuit, remove higher hamonic wave in circuit, resistance R35 is blood pressure lowering protective resistance, low-frequency channel is carrying out a computing through U3 logical gate operations device, produce control signal and DC voltage, couple with the A pin of chip J1 through R2R4R6 series connection. in addition, another low-pressure section of circuit, through Zener diode D22, it is connected to NPN audion Q10 output, the base voltage of Q10 is provided by resistance R45, carry out low pressure output, simultaneously, audion 5551 and voltage stabilizing crystal diode Q21 and R44 built-up circuit gain circuitry are connected to chip J1.U4 through R41 boost resistor from the output of B end is provided protection voltage by resistance R36 arithmetical unit, through electrostatic capacitance C6, resistance R38, R24 and triode Q2 forms filter circuit, low frequency exports, series connection R1R3R5 and diode D16 coupling chip J1 end after the voltage secondary frequency conversion that U3 obtains.

In like manner, the high-level output voltage of Q15 and Q3, R31R25, electrostatic capacitance C7 forms gain feedback circuit, then through U5 arithmetical unit, carries out stimulating computing, export from AB end respectively, simultaneously U6 arithmetical unit and the output of post filtering circuit low frequency, R42 output of connecting after the secondary frequency conversion that U5 obtains.

By that analogy, C, B, the principle of C end output is ibid.

Phase sequence module operation principle: JA, JB, JC be three-phase electricity terminal respectively, main circuit will by half-wave rectifying circuit, current-limiting circuit, sequential competition circuit, and light is even isolates circuit, charge-discharge circuit, on-off circuit composition, assume the advanced B120 degree of A, C120 degree before B ultrasonic, then when A is more than C, and A more than zero time, audion Q4 positively biased, when B comes owing to Q4 is in the conduction state, then light idol U1 conducting, makes Q6 end simultaneously. In like manner, U5 turns on, and Q12 ends. Once turning on because U1, U5 experienced in each cycle, so the base voltage of Q1 and Q10 is because the even periodic discharge of light maintains less fluctuation voltage all the time, do not reach 0.7V switching voltage, then the conducting of Q9 positively biased, Q3 exports positive voltage instruction positive sequence.

In like manner, such as A, B reversal connection, then light idol U2, U6 conducting, Q4, Q11 ends, and Q15 exports positive voltage instruction inverted sequence.

When scarce arbitrary phase time, or lack the positive bias-voltage of Q4, Q6, Q11, Q12, or can not form the loop of light idol front end, then the even all cut-offs of light, Q1, Q2, Q10, Q13 are quickly charged to saturation conduction, then Q3, Q15 all end instruction phase shortage.

Phase sequence detection module is in the application of actuator:

Input: 380VAC. Output: the combination of 24VDC, 0VDC.

Effect: power detecting, the three phase mains of detection access, forward, reverse and power failure.

Such as following table:

Of the present utility model ultimate principle, principal character and advantage have more than been shown and described. Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description is that principle of the present utility model is described; under the premise without departing from this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements both fall within the scope of claimed this utility model. This utility model claims scope and is defined by appending claims and equivalent thereof.

Claims

1. an electric operator three-phase power supply phase sequence and lack detection circuit, including chip J1 and chip J2, it is characterized in that: described testing circuit includes half-wave rectifying circuit, current-limiting circuit and optical coupling isolation circuit, described half-wave rectifying circuit is connected 1 diode respectively by two pins of chip J1 and 3 resistor coupled in parallel form, described current-limiting circuit is formed by 2 and 2 resistor coupled in parallel, described optical coupling isolation circuit is by 1 photoelectric coupling circuit, 1 electrostatic capacitance, 3 resistance are formed by connecting, described electrostatic capacitance is connected to the vb-pin of chip J2, described resistance is connected to the 24vb pin of chip J1, described half-wave rectifying circuit, sequential competition circuit is connected and composed by NPC audion between current-limiting circuit and optical coupling isolation circuit.

2. electric operator three-phase power supply phase sequence according to claim 1 and lack detection circuit, it is characterized in that: also include charge-discharge circuit and on-off circuit, described charge-discharge circuit is connected to NPC transistor collector by chip through XXJC pin, exports from NPC triode emission level high voltage through amplifying.

3. electric operator three-phase power supply phase sequence according to claim 2 and lack detection circuit, it is characterized in that: the resistance in described half-wave rectifying circuit and current-limiting circuit is 51K ohm, the resistance in described optical coupling isolation circuit is 24K ohm.

4. electric operator three-phase power supply phase sequence according to claim 3 and lack detection circuit, it is characterised in that: the diode in described circuit adopts IN4007 diode, and NPC transistor collector adopts 2N5551 audion.