CN206756942U - A kind of three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency - Google Patents
A kind of three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency Download PDFInfo
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- CN206756942U CN206756942U CN201720311180.4U CN201720311180U CN206756942U CN 206756942 U CN206756942 U CN 206756942U CN 201720311180 U CN201720311180 U CN 201720311180U CN 206756942 U CN206756942 U CN 206756942U
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- photoelectrical coupler
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Abstract
The utility model discloses a kind of three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency to include PLC high speed counting modules, the PLC high speed counting modules are connected with the PLC of Phase sequence detection CPU module, the PLC high speed counting modules signal end is connected with signaling conversion circuit output end, and the signaling conversion circuit is connected with test point and gathers three-phase sinusoidal signal.The utility model realizes the detection of three-phase phase-sequence by signaling conversion circuit and detection method, the detection circuit unnecessary without increasing other complexity using the configured PLC module of induction heating equipment of medium frequency.Make up firing equipment phase sequence function, it is ensured that heating coil Intermediate frequency power supply system safety.
Description
Technical field
The utility model belongs to Phase sequence detection field, and in particular to a kind of three-phase alternating current Phase sequence detection of induction heating equipment of medium frequency
Device.
Background technology
Induction heating equipment of medium frequency is that heating coil dispatching is intermediate frequency three-phase alternating current, three-phase alternating current phase mutual deviation 1200,
And there is relative ordinal relation, while the frequency of three-phase electricity is identical, potential amplitude is identical.It is A phases such as to determine any one phase, that
B phases phase should lag A phases 1200, C phase delayed phase A phases 2400, or advanced A phases 1200。
At present, induction heating equipment of medium frequency does not possess output Phase sequence detection and defencive function, and export phase sequence mistake can be to heating
The normal operation of coil causes badly damaged therefore extremely important for the phase ordered pair firing equipment of three-phase output alternating current.It is existing
More using the order of single-chip microcomputer and electric circuit inspection three-phase potential, induction heating equipment of medium frequency needs to configure list some Phase sequence detection technologies
Piece machine and measuring circuit can realize output Phase sequence detection, can so greatly increase cost and complexity.
The content of the invention
The utility model proposes that the purpose is to provide a kind of induction heating equipment of medium frequency to solve the problems, such as that prior art is present
Three-phase alternating current detection device for phase sequence.
The technical solution of the utility model is：A kind of three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency, including PLC
High speed counting module, the PLC high speed counting modules are connected with the PLC of Phase sequence detection CPU module, the PLC high-speed countings
Module by signal end is connected with signaling conversion circuit output end, and the signaling conversion circuit is connected with test point and gathers three phase sine
Signal, the signaling conversion circuit is by direct current 24V power voltage supplies.
No. I change-over circuit that the signaling conversion circuit includes being connected with U phases, No. II change-over circuit being connected with V phases,
No. III change-over circuit being connected with W phases.
No. I change-over circuit includes diode D1, I photoelectrical coupler, the resistance being sequentially connected in series between U phases, V phases
R1, diode D2 both ends and No. I photoelectrical coupler input reverse parallel connection, No. I photoelectrical coupler export U phase square wave arteries and veins
Punching.
No. II change-over circuit includes diode D3, No. II photoelectrical coupler, the electricity being sequentially connected in series between V phases, W phases
R2, diode D4 both ends and No. II photoelectrical coupler input reverse parallel connection are hindered, No. II photoelectrical coupler exports V phase square waves
Pulse.
No. III change-over circuit includes diode D5, No. III photoelectrical coupler, the electricity being sequentially connected in series between W phases, U phases
R3, diode D6 both ends and No. III photoelectrical coupler input reverse parallel connection are hindered, No. III photoelectrical coupler exports W phase square waves
Pulse.
The detection method of the three-phase alternating current detection device for phase sequence of any one above-mentioned induction heating equipment of medium frequency, including following step
Suddenly：
（ⅰ）Initialization
Start to initialize, rest-set flip-flop M0.0, M0.1 pulse timer T1, T2 are set to 0.
（ⅱ）Three-phase whether phase shortage
Program first detects whether after initialization as three-phase square wave signal, with this judge three-phase electricity whether phase shortage, such as
Fruit phase shortage enters step（ⅲ）If phase shortage does not enter step（ⅳ）.
（ⅲ）Put phase shortage mark
Such as step（ⅱ）Middle three-phase square wave signal lacks a phase, then puts flag bit and return to step（ⅱ）And return and continue to examine
Survey three-phase square wave signal.
（ⅳ）Detect U phase square-wave signal rising edges
U phase square-wave signal rising edges are detected, are such as not detected by U phase square-wave signal rising edges, then returns and continues to detect U phase sides
Ripple signal rising edge performs step up to detecting U phase square-wave signal rising edges（ⅴ）, step（ⅷ）.
（ⅴ）Put flag bit flag1
To step（ⅳ）The U phase square-wave signal rising edges detected put flag bit flag1.
（ⅵ）Set rest-set flip-flop M0.0, M0.1
Flag bit flag1 triggers rest-set flip-flop M0.0, M0.1 simultaneously.
（ⅶ）Trigger pulse timer T1, T2
Trigger M0.0, M0.1 trigger timer T1, T2 respectively, and start simultaneously at timing.
（ⅷ）Detect V, W phase square-wave signal rising edge
Step（ⅳ）In detect U phase square-wave signal rising edges after, while detect V, W phase square-wave signal rising edge.
（ⅸ）Put flag bit flag2, flag3
V, W phase square-wave signal rising edge are detected, then puts flag bit flag2, flag3.
（ⅹ）Reset rest-set flip-flop M0.0, M0.1
Flag bit flag2, flag3 respectively reset rest-set flip-flop M0.0, M0.1.
（ⅹⅰ）Pulse timer T1, T2 stop timing
Step（ⅹ）Rest-set flip-flop M0.0, after M0.1 resets, timer T1, T2 stop timing simultaneously.
（ⅹⅱ）Read pulse timer T1, T2
Timer T1, T2 timing duration is read respectively, and duration is stored in data block DB1.DBD0, DB1.DBD4.
（ⅹⅲ）T1, T2 are calculated with cycle T ratio respectively
By data block DB1.DBW0, DB1.DBW2 difference divided by cycle T, cycle T is the inverse of current frequency, and will be calculated
As a result it is stored in respectively in data block DB1.DBD8, DB1.DBD12.
（ⅹⅳ）Whether judged result is correct
By step（ⅹⅲ）Middle data block DB1.DBD8, DB1.DBD12 is compared computing, as a result correctly performs step
（ⅹⅴ）, as a result incorrect execution step（ⅱ）.
（ⅹⅴ）Put output identification position
Comparison operation structure meets, then puts output identification position.
Step（ⅹⅳ）The correct scope of data is 0.25 ~ 0.4 in middle data block DB1.DBD8, and data block
The correct scope of data is 0.58 ~ 0.75 in DB1.DBD12.
The utility model passes through signaling conversion circuit and detection method using the configured PLC module of induction heating equipment of medium frequency
The detection of three-phase phase-sequence is realized, the detection circuit unnecessary without increasing other complexity.Firing equipment phase sequence function is made up, really
Protect heating coil Intermediate frequency power supply system safety.
Brief description of the drawings
Fig. 1 is the detection principle diagram of detection means in the utility model；
Fig. 2 is the circuit diagram of signaling conversion circuit in Fig. 1；
Fig. 3 is the method flow diagram of detection method in the utility model；
Wherein：
The PLC high speed counting modules of 1 signaling conversion circuit 2
3 PLC 4 No. I change-over circuits of CPU module
5 No. II change-over circuits, 6 No. III change-over circuits.
Embodiment
Hereinafter, the utility model is described in detail with embodiment referring to the drawings：
As shown in figure 1, a kind of three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency, including PLC high speed counting modules
2, the PLC high speed counting modules 2 are connected with the PLC of Phase sequence detection CPU module 3, the signal of PLC high speed counting modules 2
End is connected with the output end of signaling conversion circuit 1, and the signaling conversion circuit 1 is connected with test point and gathers three-phase sinusoidal signal,
The signaling conversion circuit 1 is by direct current 24V power voltage supplies.
The PLC high speed counting modules 2 are Siemens 550.
The CPU module 3 of the PLC is Siemens 1151.
As shown in Fig. 2 the signaling conversion circuit 1 include being connected with U phases No. I change-over circuit 4, be connected with V phases
No. II change-over circuit 5, No. III change-over circuit 6 being connected with W phases.
No. I change-over circuit 4 includes diode D1, I photoelectrical coupler, the electricity being sequentially connected in series between U phases, V phases
R1, diode D2 both ends and No. I photoelectrical coupler input reverse parallel connection are hindered, No. I photoelectrical coupler exports U phase square wave arteries and veins
Punching.
No. II change-over circuit 5 include being sequentially connected in series diode D3 between V phases, W phases, No. II photoelectrical coupler,
Resistance R2, diode D4 both ends and No. II photoelectrical coupler input reverse parallel connection, No. II photoelectrical coupler output V phase sides
Wave impulse.
No. III change-over circuit 6 include being sequentially connected in series diode D5 between W phases, U phases, No. III photoelectrical coupler,
Resistance R3, diode D6 both ends and No. III photoelectrical coupler input reverse parallel connection, No. III photoelectrical coupler output W phase sides
Wave impulse.
The diode D1, diode D2, diode D3, diode D4, diode D5, diode D6 are FR107 types
Diode.
VCC powers for photoelectrical coupler direct current 24V.
As shown in figure 3, the detection method of the three-phase alternating current detection device for phase sequence of any one above-mentioned induction heating equipment of medium frequency, bag
Include following steps：
（ⅰ）Initialize S1
Start to initialize, rest-set flip-flop M0.0, M0.1 pulse timer T1, T2 are set to 0.
（ⅱ）Three-phase whether phase shortage S2
Program first detects whether after initialization as three-phase square wave signal, with this judge three-phase electricity whether phase shortage, such as
Fruit phase shortage enters step（ⅲ）If phase shortage does not enter step（ⅳ）.
（ⅲ）Put phase shortage mark S3
Such as step（ⅱ）Middle three-phase square wave signal lacks a phase, then puts flag bit and return to step（ⅱ）And return and continue to examine
Survey three-phase square wave signal.
（ⅳ）Detect U phase square-wave signal rising edges S4
U phase square-wave signal rising edges are detected, are such as not detected by U phase square-wave signal rising edges, then returns and continues to detect U phase sides
Ripple signal rising edge performs step up to detecting U phase square-wave signal rising edges（ⅴ）, step（ⅷ）.
（ⅴ）Put flag bit flag1, S5
To step（ⅳ）The U phase square-wave signal rising edges detected put flag bit flag1.
（ⅵ）Set rest-set flip-flop M0.0, M0.1, S6
Flag bit flag1 triggers rest-set flip-flop M0.0, M0.1 simultaneously.
（ⅶ）Trigger pulse timer T1, T2, S7
Trigger M0.0, M0.1 trigger timer T1, T2 respectively, and start simultaneously at timing.
（ⅷ）Detect V, W phase square-wave signal rising edge, S8
Step（ⅳ）In detect U phase square-wave signal rising edges after, while detect V, W phase square-wave signal rising edge.
（ⅸ）Put flag bit flag2, flag3, S9
V, W phase square-wave signal rising edge are detected, then puts flag bit flag2, flag3.
（ⅹ）Reset rest-set flip-flop M0.0, M0.1, S10
Flag bit flag2, flag3 respectively reset rest-set flip-flop M0.0, M0.1.
（ⅹⅰ）Pulse timer T1, T2 stop timing S11
Step（ⅹ）Rest-set flip-flop M0.0, after M0.1 resets, timer T1, T2 stop timing simultaneously.
（ⅹⅱ）Read pulse timer T1, T2, S12
Timer T1, T2 timing duration is read respectively, and duration is stored in data block DB1.DBD0, DB1.DBD4.
（ⅹⅲ）T1, T2 are calculated into S13 with cycle T ratio respectively
By data block DB1.DBW0, DB1.DBW2 difference divided by cycle T, cycle T is the inverse of current frequency, and will be calculated
As a result it is stored in respectively in data block DB1.DBD8, DB1.DBD12.
（ⅹⅳ）The whether correct S14 of judged result
By step（ⅹⅲ）Middle data block DB1.DBD8, DB1.DBD12 is compared computing, as a result correctly performs step
（ⅹⅴ）, as a result incorrect execution step（ⅱ）.
（ⅹⅴ）Put output identification position S15
Comparison operation structure meets, then puts output identification position.
Step（ⅹⅳ）The correct scope of data is 0.25 ~ 0.4 in middle data block DB1.DBD8, and data block
The correct scope of data is 0.58 ~ 0.75 in DB1.DBD12.
The utility model passes through signaling conversion circuit and detection method using the configured PLC module of induction heating equipment of medium frequency
The detection of three-phase phase-sequence is realized, the detection circuit unnecessary without increasing other complexity.Firing equipment phase sequence function is made up, really
Protect heating coil Intermediate frequency power supply system safety.
Claims (5)
1. a kind of three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency, including PLC high speed counting modules（2）, its feature exists
In：The PLC high speed counting modules（2）With the PLC of Phase sequence detection CPU module（3）It is connected, the PLC high speed counting modules
（2）Signal end and signaling conversion circuit（1）Output end is connected, the signaling conversion circuit（1）It is connected with test point and gathers three
Phase sinusoidal signal, the signaling conversion circuit（1）By direct current 24V power voltage supplies.
A kind of 2. three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency according to claim 1, it is characterised in that：Institute
State signaling conversion circuit（1）Include No. I change-over circuit being connected with U phases（4）, No. II change-over circuit being connected with V phases（5）、
No. III change-over circuit being connected with W phases（6）.
A kind of 3. three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency according to claim 2, it is characterised in that：Institute
State No. I change-over circuit（4）Including diode D1, I photoelectrical coupler, the resistance R1 being sequentially connected in series between U phases, V phases, two poles
Pipe D2 both ends and No. I photoelectrical coupler input reverse parallel connection, No. I photoelectrical coupler export U phase square-wave pulses.
A kind of 4. three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency according to claim 2, it is characterised in that：Institute
State No. II change-over circuit（5）Including the diode D3, No. II photoelectrical coupler, resistance R2 being sequentially connected in series between V phases, W phases, two
Pole pipe D4 both ends and No. II photoelectrical coupler input reverse parallel connection, No. II photoelectrical coupler export V phase square-wave pulses.
A kind of 5. three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency according to claim 2, it is characterised in that：Institute
State No. III change-over circuit（6）Including the diode D5, No. III photoelectrical coupler, resistance R3 being sequentially connected in series between W phases, U phases, two
Pole pipe D6 both ends and No. III photoelectrical coupler input reverse parallel connection, No. III photoelectrical coupler export W phase square-wave pulses.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720311180.4U CN206756942U (en) | 2017-03-28 | 2017-03-28 | A kind of three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720311180.4U CN206756942U (en) | 2017-03-28 | 2017-03-28 | A kind of three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency |
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| CN206756942U true CN206756942U (en) | 2017-12-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771681A (en) * | 2017-03-28 | 2017-05-31 | 核工业理化工程研究院 | The three-phase alternating current detection device for phase sequence and its detection method of a kind of induction heating equipment of medium frequency |
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2017
- 2017-03-28 CN CN201720311180.4U patent/CN206756942U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771681A (en) * | 2017-03-28 | 2017-05-31 | 核工业理化工程研究院 | The three-phase alternating current detection device for phase sequence and its detection method of a kind of induction heating equipment of medium frequency |
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