CN206559260U - The soft initiator of compatible inscribed methods and method for externally - Google Patents

Abstract

The utility model discloses a kind of soft initiator of compatible inscribed methods and method for externally, including soft initiator body, single-chip microcomputer, IV detection circuits and drive circuit, soft initiator body includes three groups of soft initiator units, every phase output terminal of three-phase alternating-current supply is connected with the input of corresponding one group of soft initiator unit, the input of the output end of every group of soft initiator unit phase corresponding with motor is connected, and every phase output terminal of motor is connected with the input of corresponding one group of soft initiator unit；The output end of three groups of soft initiator units detects that the input of circuit is connected with IV, and the output end of IV detection circuits is electrically connected with the input of single-chip microcomputer, and single-chip microcomputer is method for externally or inscribed methods according to the voltage and current signal determining soft initiator received；The output end of single-chip microcomputer and the input of drive circuit are connected, and single-chip microcomputer gives every group of soft initiator unit triggers signal by the output end of drive circuit.

Description

The soft initiator of compatible inscribed methods and method for externally

Technical field

The utility model is related to soft initiator technical field, more particularly to a kind of compatible inscribed methods and the soft of method for externally are opened Dynamic device.

Background technology

Soft initiator product only has the three-wire connection of external triangle in the market, and three-wire connection also referred to as connects for standard Method, but soft initiator also has inscribed law technology to reduce by 3 times of electric current √, that is, improve 1.732 times of electric currents of method for externally Capacity, if soft initiator wiring allows compatibility, then user can save the buying cost of half or so.State in the market Inside and outside product is without the three lines product compatible with six lines.

In the prior art, Fig. 1 and Fig. 2 are referred to, the standard outlet of connection box for motor is six lines, it is therefore an objective to allow user to have The right to choose of Y- delta connections, Y wiring is not described in detail herein.The triangle inscribed methods of motor are as shown in figure 1, connection box for motor W2/U2/V2 must be connected to power end, U1/V1/W1 must be connected to SCR-output end, therefore the triangle inscribed methods of motor Outlet for six lines be respectively that three lines and U1/V1/W1 that W2/U2/V2 is connected with power end are connected to SCR-output end Three lines；The triangle method for externally of motor is as shown in Fig. 2 can be straight in connection box for motor binding post U1W2/U2V1/V2W1 Short circuit is connect, three motor wiring are formed, this is general outer delta-connection, and outlet only has three lines.

The difficulty encountered in the design triangle shape method for externally product compatible with inscribed methods is that Fig. 2 method for externally only has three motors Wiring, in addition three lines can the direct short-circuit on connection box for motor, and inscribed methods are six motor wiring in Fig. 1, ginseng Current sensor position must take out from the front and back position dismounting of IGCT and be additionally installed on user when examining Fig. 1 compatible connection Power end, for compatible inscribed methods, the position of inscribed methods current sensor must be and external above 2T1/4T2/6T3 The power end of user is necessarily mounted at during method；If not having to exchange the electric current detected during current sensor during triangle method for externally is Mistake, that is, current reductionTimes；User must dismantle the violation of product major loop device for soft initiator manufactory Device inside product guarantee principle, soft initiator manufactory absolute prohibition user's realizing self disassembling product, and user also dare not Do, Keep Clear-High Voltage because having, be also unwilling to do.So past method for externally but can not commercially be realized with inscribed law technology and answered With.

Utility model content

For weak point present in above-mentioned technology, the utility model provides a kind of compatible inscribed methods and method for externally Soft initiator, it is allowed to which method for externally and inscribed methods are compatible, power saving, and the buying cost of effectively save client.

To achieve the above object, the utility model provides a kind of soft initiator of compatible inscribed methods and method for externally, including Soft initiator body, single-chip microcomputer, IV detection circuits and drive circuit, the soft initiator body include three groups of soft initiator lists Member, every phase output terminal of three-phase alternating-current supply is connected with the input of corresponding one group of soft initiator unit, every group of soft initiator list Member output end phase corresponding with motor input connect, and motor every phase output terminal with corresponding one group of soft initiator unit Input connection；The output end of three groups of soft initiator units detects that the input of circuit is connected with IV, and the IV detects circuit Output end electrically connected with the input of single-chip microcomputer, voltage of the IV detection circuit to the output end of three groups of soft initiator units Single-chip microcomputer is sent to after being detected with current signal, and the single-chip microcomputer should according to the voltage and current signal determining received Soft initiator is method for externally or inscribed methods；The output end of the single-chip microcomputer and the input of drive circuit are connected, and the list Piece machine gives every group of soft initiator unit triggers signal by the output end of drive circuit.

Wherein, the soft initiator also includes display, and the output end of the single-chip microcomputer and the input of display are connected；Institute State after single-chip microcomputer judges the soft initiator as method for externally, the single-chip microcomputer control display shows electric current of the motor per phase input Value；After the single-chip microcomputer judges the soft initiator as inscribed methods, the single-chip microcomputer control display shows motor per phase input Current valueTimes.

Wherein, every group of soft initiator unit includes bypass relay, antiparallel forward conduction IGCT and reversely led It is in parallel with bypass relay after logical IGCT, the forward conduction IGCT and reverse-conducting thyristor reverse parallel connection；It is described The anode of forward conduction IGCT and the negative electrode of reverse-conducting thyristor connect the common port and three-phase alternating-current supply of formation The connection of corresponding phase output terminal, and the negative electrode of the forward conduction IGCT and the anode of reverse-conducting thyristor connect shape Into common port phase corresponding with motor input connection；The single-chip microcomputer is brilliant to forward conduction by the output end of drive circuit The control pole of brake tube and the control pole trigger signal of reverse-conducting thyristor, and the output end that the single-chip microcomputer passes through drive circuit Control bypass relay carries out adhesive or opening.

Wherein, the soft initiator also includes voltage detecting circuit, every phase output terminal of the three-phase alternating-current supply with electricity The input connection of pressure detection circuit, the output end of the voltage detecting circuit and the input of single-chip microcomputer are connected, and the electricity Pressure detection electric circuit inspection arrive every phase output terminal voltage of three-phase alternating-current supply after be sent to single-chip microcomputer handle.

The beneficial effects of the utility model are：Compared with prior art, the utility model provide compatible inscribed methods and The soft initiator of method for externally, single-chip microcomputer be control core there is provided command signal to drive circuit, and then drive three groups of soft initiators Unit；IV detection circuits are used for the voltage and current signal for detecting the output end of three groups of soft initiator units, and by testing result Single-chip microcomputer is sent to, single-chip microcomputer judges the soft initiator as method for externally or inscribed methods according to testing result；Every group of soft initiator Before the equal off-duty of unit, if IV detects electric circuit inspection to output end voltage and current signal of the motor per phase, single-chip microcomputer judgement The soft initiator is inscribed methods；If IV detection circuit inspections are less than the output end voltage and current signal of three groups of soft initiator units, Then single-chip microcomputer judges the soft initiator as method for externally so that inscribed methods and method for externally can compatibility use, user can be according to itself Selection method for externally or inscribed methods are needed, are not required to dismantle current sensor, it is not required that any device of increase adjusts any parameter； Also, using after the soft initiator, single-chip microcomputer is controllable to carry out power saving using inscribed methods, and effectively save client buys into This.

Brief description of the drawings

Fig. 1 is the motor triangle inscribed methods of prior art；

Fig. 2 is the motor triangle method for externally of prior art；

Fig. 3 is the line chart of the soft initiator of compatible inscribed methods and method for externally of the present utility model.

Main element symbol description is as follows：

1st, single-chip microcomputer 2, IV detection circuits

3rd, drive circuit 4, soft initiator unit

5th, three-phase alternating-current supply 6, motor

7th, display 8, voltage detecting circuit.

Embodiment

In order to more clearly state the utility model, the utility model is further described below in conjunction with the accompanying drawings.

Referring to Fig. 3, the soft initiator of compatible inscribed methods of the present utility model and method for externally, including soft initiator sheet Body, single-chip microcomputer 1, IV detection circuits 2 and drive circuit 3, soft initiator body include three groups of soft initiator units 4, three-phase alternating current Every phase output terminal of power supply 5 is connected with the input of corresponding one group of soft initiator unit 4, the output of every group of soft initiator unit 4 Hold and connected with the input of the corresponding phase of motor 6, and every phase output terminal of motor 6 is defeated with corresponding one group of soft initiator unit 4 Enter end connection；The output end of three groups of soft initiator units 4 detects that the input of circuit 2 is connected with IV, and IV detects the output of circuit 2 End is electrically connected with the input of single-chip microcomputer 1, the voltage and current of the output end of IV detection three groups of soft initiator units 4 of circuit 2 pair Signal is sent to single-chip microcomputer 1 after being detected, and single-chip microcomputer 1 is according to the voltage and current signal determining soft initiator received For method for externally or inscribed methods；The output end of single-chip microcomputer 1 is connected with the input of drive circuit 3, and single-chip microcomputer 1 is by driving electricity The output end on road 3 gives every group of trigger signal of soft initiator unit 4.IV detects that circuit 2 detects for Current Voltage of the prior art Circuit, if it can detect that the voltage and current signal of the output end of every group of soft initiator unit 4 obtains testing result, and will detection As a result the IV detection circuits 2 of single-chip microcomputer 1 are sent to；Drive circuit 3 for it is of the prior art can trigger in this case soft open The circuit of dynamic device unit 4, as long as single-chip microcomputer 1 can control it to trigger soft initiator unit 4.

Principle of the present utility model is：Fig. 1-3 are referred to, every phase output terminal of three-phase alternating-current supply 5 gives corresponding one group Before the input AC of soft initiator unit 4 electricity, every group of equal off-duty of soft initiator unit 4, if IV detection circuits 2 detect three groups The output end voltage and current signal of soft initiator unit 4, then illustrate that the alternating current of three-phase alternating-current supply 5 passes through three groups of soft starts Unit is exported to motor 6 so that IV detection circuits 2 are able to detect that the output end voltage and electric current of three groups of soft initiator units 4 Signal, then illustrate that connection box for motor binding post U1W2/U2V1/V2W1, without short circuit, forms six motor wiring, i.e. monolithic Machine 1 can determine that the mode of connection is inscribed methods；If IV detection circuits 2 can't detect the output end of three groups of soft initiator units 4 Voltage and current signal, the alternating current of three-phase alternating-current supply 5 is directly output to motor 6 so that IV detection circuits 2 can not be detected The output end voltage and current signal of three groups of soft initiator units 4, then illustrate connection box for motor binding post U1W2/U2V1/ V2W1 direct short-circuits, form three wiring of motor 6, i.e. single-chip microcomputer 1 and can determine that the mode of connection is method for externally.

Compared with prior art, the utility model is provided compatible inscribed methods and the soft initiator of method for externally, single-chip microcomputer 1 For control core there is provided command signal to drive circuit 3, and then drive three groups of soft initiator units 4；IV detection circuits 2 are used for The voltage and current signal of the output end of three groups of soft initiator units 4 is detected, and testing result is sent to single-chip microcomputer 1, monolithic Machine 1 judges the soft initiator as method for externally or inscribed methods according to testing result；Before every group of equal off-duty of soft initiator unit 4, If IV detection circuit 2 detect motor 6 per phase output end voltage and current signal, single-chip microcomputer 1 judge the soft initiator as Inscribed methods；If IV detection circuits 2 examine the output end voltage and current signal less than three groups of soft initiator units 4, single-chip microcomputer 1 is sentenced The fixed soft initiator is method for externally so that inscribed methods and method for externally can compatibility use, user can select outer according to their needs Connection or inscribed methods, are not required to dismantle current sensor, it is not required that any device of increase adjusts any parameter；Also, use After the soft initiator, single-chip microcomputer 1 is controllable to carry out power saving, and the buying cost of effectively save client using inscribed methods.

In the present embodiment, the soft initiator also includes display 7, the output end of single-chip microcomputer 1 and the input of display 7 Connection；After single-chip microcomputer 1 judges the soft initiator as method for externally, the control display 7 of single-chip microcomputer 1 shows motor 6 per phase input Current value；After single-chip microcomputer 1 judges the soft initiator as inscribed methods, the control display 7 of single-chip microcomputer 1 shows motor 6 per phase input Current valueTimes.About 1.732 times again, by single-chip microcomputer 1 output current can be caused to reduce by 1.732 times, effectively Power saving effect is reached, is conducive to user to substantially reduce purchase cost.

In the present embodiment, every group of soft initiator unit 4 includes bypass relay KM, antiparallel forward conduction IGCT After VT1 and reverse-conducting thyristor VT2, forward conduction IGCT VT1 and reverse-conducting thyristor VT2 reverse parallel connections with bypass Relay KM is in parallel；Forward conduction IGCT VT1 anode and reverse-conducting thyristor VT2 negative electrode connect the public affairs of formation End is connected with the corresponding phase output terminal of three-phase alternating-current supply 5 altogether, and forward conduction IGCT VT1 negative electrode and reverse-conducting are brilliant Brake tube VT2 anode connects the common port of formation and connected with the input of the corresponding phase of motor 6；Single-chip microcomputer 1 passes through drive circuit 3 Output end to forward conduction IGCT VT1 control pole and reverse-conducting thyristor VT2 control pole trigger signal, and monolithic Machine 1 carries out adhesive or opening by the output end control bypass relay KM of drive circuit 3.By bypass relay KM and it is anti-simultaneously The forward conduction IGCT VT1 and reverse-conducting thyristor VT2 of connection cooperation so that each group soft initiator unit 4 reaches soft open Dynamic effect, realizes reduced-voltage starting.

In the present embodiment, the soft initiator also includes voltage detecting circuit 8, and every phase output terminal of three-phase alternating-current supply 5 is equal It is connected with the input of voltage detecting circuit 8, the output end of voltage detecting circuit 8 is connected with the input of single-chip microcomputer 1, and voltage Detection circuit 8, which is detected, to be sent to single-chip microcomputer 1 after every phase output terminal voltage of three-phase alternating-current supply 5 and handles.Voltage detecting circuit 8 For circuit of the prior art, the electricity that single-chip microcomputer 1 is analyzed and processed is sent to after the voltage that three-phase alternating-current supply 5 can be collected Pressure detection circuit 8, and the signal detection that voltage detecting circuit 8 is protected as the voltage of three-phase alternating-current supply 5 as motor 6.

The soft initiator of compatible inscribed methods and method for externally of the present utility model, which has, following facts have proved its advantage：

1) client needs a 380V, and the soft initiator of 1800kW alternating current generators 6 has inquired domestic and international maximum soft initiator Supplier, which replys, can not produce the product of so Large Copacity, and also not produce the product of such Large Copacity, through inquiry visitor The motor 6 at family is six wiring, judges using the inscribed methods of soft initiator to start, is then only needed using the soft initiator of this case Produce 1,000kW, 380V soft initiator, it is desirable to which user is started using inscribed methods, client solves demand Problem, but also the input cost of reduction by 200,000；

2) client has an AC induction motor 6315kW to need soft initiator product, can only commercially buy at present 315kW soft initiator, still, if the soft initiator of purchase this case, client can select to buy 187kW, this case Soft initiator can then reduce the buying cost of half, and volume-diminished half, switch cabinet using method for externally in triangle Product demand also reduces；

3) client buys the traditional product of a 110kW capacity, can only but drive the capacity of 110kW motors 6；If using this The soft initiator of case, as long as the soft initiator that 110kW is inscribed in the external 60kW/ of purchase this case is that can be used, and client needs branch The purchase cost paid is paid according to 60kW, saves the buying cost close to half.

Disclosed above is only several specific embodiments of the present utility model, but the utility model is not limited to this, The changes that any person skilled in the art can think of should all fall into protection domain of the present utility model.

Claims (4)

1. the soft initiator of a kind of compatible inscribed methods and method for externally, it is characterised in that including soft initiator body, single-chip microcomputer, IV detects circuit and drive circuit, and the soft initiator body includes three groups of soft initiator units, every phase of three-phase alternating-current supply Output end is connected with the input of corresponding one group of soft initiator unit, the output end phase corresponding with motor of every group of soft initiator unit Input connection, and motor every phase output terminal with the connection of the input of corresponding one group of soft initiator unit；Three groups soft to open The output end of dynamic device unit detects that the input of circuit is connected with IV, the output end of the IV detections circuit and the input of single-chip microcomputer End electrical connection, the IV detections circuit is sent out after being detected to the voltage and current signal of the output end of three groups of soft initiator units Give single-chip microcomputer, and the single-chip microcomputer according to the voltage and current signal determining soft initiator received be method for externally or in Connection；The output end of the single-chip microcomputer and the input of drive circuit are connected, and the output that the single-chip microcomputer passes through drive circuit Hold to every group of soft initiator unit triggers signal.

2. the soft initiator of compatible inscribed methods according to claim 1 and method for externally, it is characterised in that the soft initiator Also include display, the output end of the single-chip microcomputer and the input of display are connected；The single-chip microcomputer judges the soft initiator After method for externally, the single-chip microcomputer control display shows current value of the motor per phase input；The single-chip microcomputer judges that this is soft Starter is after inscribed methods, the single-chip microcomputer control display shows current value of the motor per phase inputTimes.

3. the soft initiator of compatible inscribed methods according to claim 1 and method for externally, it is characterised in that every group of soft start Device unit includes bypass relay, antiparallel forward conduction IGCT and reverse-conducting thyristor, and the forward conduction is brilliant It is in parallel with bypass relay after brake tube and reverse-conducting thyristor reverse parallel connection；The anode of the forward conduction IGCT and The negative electrode of reverse-conducting thyristor connects the common port of formation and connected with the corresponding phase output terminal of three-phase alternating-current supply, and described The negative electrode of forward conduction IGCT and the anode of reverse-conducting thyristor connect the common port phase corresponding with motor of formation Input is connected；The single-chip microcomputer is brilliant to the control pole and reverse-conducting of forward conduction IGCT by the output end of drive circuit The control pole trigger signal of brake tube, and the single-chip microcomputer by the output end of drive circuit control bypass relay carry out adhesive or Open.

4. the soft initiator of compatible inscribed methods according to claim 1 and method for externally, it is characterised in that the soft initiator Also include voltage detecting circuit, every phase output terminal of the three-phase alternating-current supply is connected with the input of voltage detecting circuit, The output end of the voltage detecting circuit and the input of single-chip microcomputer are connected, and the voltage detecting circuit detects three-phase alternating current Single-chip microcomputer processing is sent to after every phase output terminal voltage of power supply.