CN106771681A - The three-phase alternating current detection device for phase sequence and its detection method of a kind of induction heating equipment of medium frequency - Google Patents
The three-phase alternating current detection device for phase sequence and its detection method of a kind of induction heating equipment of medium frequency Download PDFInfo
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- CN106771681A CN106771681A CN201710193409.3A CN201710193409A CN106771681A CN 106771681 A CN106771681 A CN 106771681A CN 201710193409 A CN201710193409 A CN 201710193409A CN 106771681 A CN106771681 A CN 106771681A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
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Abstract
The invention discloses the three-phase alternating current detection device for phase sequence and its detection method of a kind of induction heating equipment of medium frequency, its detection means includes PLC high speed counting modules, the PLC high speed counting modules are connected with the CPU module of the PLC of Phase sequence detection, 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.Its detection method is comprised the following steps：Initialization, three-phase whether phase shortage, put phase shortage mark, detection U phase square-wave signals rising edge, put flag bit flag1, set rest-set flip-flop M0.0, M0.1, trigger pulse timer T1, T2, detection V, W phase square-wave signal rising edge, put flag bit flag2, flag3, reset rest-set flip-flop M0.0, M0.1, pulse timer T1, T2 stop timing, read pulse timer T1, T2, T1, T2 calculated with cycle T ratio respectively, whether judged result correct, put output identification position.The present invention effectively ensures heating coil Intermediate frequency power supply system safety.
Description
Technical field
The invention belongs to Phase sequence detection field, and in particular to a kind of three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency
And its detection method.
Background technology
Induction heating equipment of medium frequency is intermediate frequency three-phase alternating current, three-phase alternating current phase mutual deviation 120 for heating coil dispatching0,
And with relative ordinal relation, while the frequency of three-phase electricity is identical, potential amplitude is identical.Any one phase is such as determined for A phases, that
B phase phases answer delayed A phases 1200, C phase delayed phase A phases 2400, or advanced A phases 1200。
At present, induction heating equipment of medium frequency do not possess output Phase sequence detection and defencive function, and export phase sequence mistake can 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
Using single-chip microcomputer and the order of electric circuit inspection three-phase potential more than some Phase sequence detection technologies, induction heating equipment of medium frequency needs configuration single
Piece machine and measuring circuit can be realized exporting Phase sequence detection, can so greatly increase cost and complexity.
The content of the invention
The present invention is proposed, the purpose is to provide a kind of induction heating equipment of medium frequency three to solve the problems, such as prior art
Cross streams detection device for phase sequence and its detection method.
The technical scheme is that：A kind of three-phase alternating current detection device for phase sequence of induction heating equipment of medium frequency, including PLC is at a high speed
Counting module, the PLC high speed counting modules are connected with the CPU module of the PLC of Phase sequence detection, 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 sine and believes
Number, the signaling conversion circuit is by direct current 24V power voltage supplies.
The signaling conversion circuit include No. II change-over circuit that No. I change-over circuit being connected with U phases be 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 that are sequentially connected in series between U phases, V phases
R1, diode D2 two 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 the diode D3, No. II photoelectrical coupler, the electricity that are sequentially connected in series between V phases, W phases
Resistance R2, diode D4 two ends and No. II photoelectrical coupler input reverse parallel connection, No. II photoelectrical coupler export V phase square waves
Pulse.
No. III change-over circuit includes the diode D5, No. III photoelectrical coupler, the electricity that are sequentially connected in series between W phases, U phases
Resistance R3, diode D6 two ends and No. III photoelectrical coupler input reverse parallel connection, No. III photoelectrical coupler export W phase square waves
Pulse.
The detection method of the three-phase alternating current detection device for phase sequence of above-mentioned any one induction heating equipment of medium frequency, including following step
Suddenly：
（ⅰ）Initialization
Start initialization, rest-set flip-flop M0.0, M0.1 pulse timer T1, T2 are set to 0.
（ⅱ）Three-phase whether phase shortage
Program by first detecting whether to be three-phase square wave signal after initialization, with this judge three-phase electricity whether phase shortage, if lack
Mutually enter 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 put flag bit and return to step（ⅱ）And return to continuation detection three
Phase square-wave signal.
（ⅳ）Detection U phase square-wave signal rising edges
Detection U phase square-wave signal rising edges, are such as not detected by U phase square-wave signal rising edges, then return and continue to detect U phases square wave letter
Number rising edge performs step until detect 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 for detecting 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）Detection 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
Data block DB1.DBW0, DB1.DBW2 is respectively divided by cycle T, cycle T is the inverse of current frequency, and by result of calculation
It is stored in data block DB1.DBD8, DB1.DBD12 respectively.
（ⅹⅳ）Whether judged result is correct
By step（ⅹⅲ）Middle data block DB1.DBD8, DB1.DBD12 is compared computing, as a result correct to perform step（ⅹ
ⅴ）, as a result incorrect execution step（ⅱ）.
（ⅹⅴ）Put output identification position
Comparison operation structure meets, then put 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 present invention is realized using the configured PLC module of induction heating equipment of medium frequency by signaling conversion circuit and detection method
The detection of three-phase phase-sequence, without increasing other complicated unnecessary detection circuits.Make up firing equipment phase sequence function, it is ensured that plus
Heat coil Intermediate frequency power supply system safety.
Brief description of the drawings
Fig. 1 is the detection principle diagram of detection means in the present invention；
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 present invention；
Wherein：
The PLC high speed counting modules of 1 signaling conversion circuit 2
4 No. I change-over circuits of CPU module of 3 PLC
5 No. II change-over circuits, 6 No. III change-over circuits.
Specific embodiment
Hereinafter, referring to the drawings and embodiment the present invention is described in detail：
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, institute
PLC high speed counting modules 2 are stated to be connected with the CPU module 3 of the PLC of Phase sequence detection, the signal end of PLC high speed counting modules 2 with
The output end of signaling conversion circuit 1 is connected, and the signaling conversion circuit 1 is connected with test point and gathers three-phase sinusoidal signal, described
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 includes what No. I change-over circuit 4 being connected with U phases was connected with V phases
No. III change-over circuit 6 that No. II change-over circuit 5 is connected with W phases.
No. I change-over circuit 4 includes diode D1, I photoelectrical coupler, the electricity that are sequentially connected in series between U phases, V phases
Resistance R1, diode D2 two 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 5 include being sequentially connected in series diode D3 between V phases, W phases, No. II photoelectrical coupler,
Resistance R2, diode D4 two 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 two 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 above-mentioned any one induction heating equipment of medium frequency, bag
Include following steps：
（ⅰ）Initialization S1
Start initialization, rest-set flip-flop M0.0, M0.1 pulse timer T1, T2 are set to 0.
（ⅱ）Three-phase whether phase shortage S2
Program by first detecting whether to be three-phase square wave signal after initialization, with this judge three-phase electricity whether phase shortage, if lack
Mutually enter 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 put flag bit and return to step（ⅱ）And return to continuation detection three
Phase square-wave signal.
（ⅳ）Detection U phase square-wave signal rising edges S4
Detection U phase square-wave signal rising edges, are such as not detected by U phase square-wave signal rising edges, then return and continue to detect U phases square wave letter
Number rising edge performs step until detect 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 for detecting 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）Detection 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
Data block DB1.DBW0, DB1.DBW2 is respectively divided by cycle T, cycle T is the inverse of current frequency, and by result of calculation
It is stored in data block DB1.DBD8, DB1.DBD12 respectively.
（ⅹⅳ）The whether correct S14 of judged result
By step（ⅹⅲ）Middle data block DB1.DBD8, DB1.DBD12 is compared computing, as a result correct to perform step（ⅹ
ⅴ）, as a result incorrect execution step（ⅱ）.
（ⅹⅴ）Put output identification position S15
Comparison operation structure meets, then put 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 present invention is realized using the configured PLC module of induction heating equipment of medium frequency by signaling conversion circuit and detection method
The detection of three-phase phase-sequence, without increasing other complicated unnecessary detection circuits.Make up firing equipment phase sequence function, it is ensured that plus
Heat coil Intermediate frequency power supply system safety.
Claims (7)
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 CPU module of the PLC of Phase sequence detection（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 and gathers three with test point
Phase sinusoidal signal, the signaling conversion circuit（1）By direct current 24V power voltage supplies.
2. the three-phase alternating current detection device for phase sequence of a kind 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）.
3. the three-phase alternating current detection device for phase sequence of a kind 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, two poles that are sequentially connected in series between U phases, V phases
Pipe D2 two ends and No. I photoelectrical coupler input reverse parallel connection, No. I photoelectrical coupler export U phase square-wave pulses.
4. the three-phase alternating current detection device for phase sequence of a kind 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, the resistance R2 that are sequentially connected in series between V phases, W phases, two
Pole pipe D4 two ends and No. II photoelectrical coupler input reverse parallel connection, No. II photoelectrical coupler export V phase square-wave pulses.
5. the three-phase alternating current detection device for phase sequence of a kind 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, the resistance R3 that are sequentially connected in series between W phases, U phases, two
Pole pipe D6 two ends and No. III photoelectrical coupler input reverse parallel connection, No. III photoelectrical coupler export W phase square-wave pulses.
6. according to claim 1 ~ 5 the three-phase alternating current detection device for phase sequence of any one induction heating equipment of medium frequency detection side
Method, it is characterised in that：Comprise the following steps：
（ⅰ）Initialization
Start initialization, rest-set flip-flop M0.0, M0.1 pulse timer T1, T2 are set to 0；
（ⅱ）Three-phase whether phase shortage
Program by first detecting whether to be three-phase square wave signal after initialization, with this judge three-phase electricity whether phase shortage, if lack
Mutually enter 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 put flag bit and return to step（ⅱ）And return to continuation detection three
Phase square-wave signal；
（ⅳ）Detection U phase square-wave signal rising edges
Detection U phase square-wave signal rising edges, are such as not detected by U phase square-wave signal rising edges, then return and continue to detect U phases square wave letter
Number rising edge performs step until detect 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 for detecting 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）Detection 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
Data block DB1.DBW0, DB1.DBW2 is respectively divided by cycle T, cycle T is the inverse of current frequency, and by result of calculation
It is stored in data block DB1.DBD8, DB1.DBD12 respectively；
（ⅹⅳ）Whether judged result is correct
By step（ⅹⅲ）Middle data block DB1.DBD8, DB1.DBD12 is compared computing, as a result correct to perform step（ⅹ
ⅴ）, as a result incorrect execution step（ⅱ）；
（ⅹⅴ）Put output identification position
Comparison operation structure meets, then put output identification position.
7. the three-phase alternating current phase sequence detecting method of a kind of induction heating equipment of medium frequency according to claim 6, it is characterised in that：Step
Suddenly（ⅹⅳ）The correct scope of data is data in 0.25 ~ 0.4, and data block DB1.DBD12 in middle data block DB1.DBD8
Correct scope is 0.58 ~ 0.75.
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| CN201710193409.3A CN106771681A (en) | 2017-03-28 | 2017-03-28 | 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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| CN201710193409.3A CN106771681A (en) | 2017-03-28 | 2017-03-28 | 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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107796998A (en) * | 2017-11-29 | 2018-03-13 | 中环天仪股份有限公司 | A kind of three-phase power supply phase sequence detection circuit and detection method |
| CN111830330A (en) * | 2020-06-03 | 2020-10-27 | 南京英锐创电子科技有限公司 | Detection circuit for specific frequency signal |
| TWI767605B (en) * | 2021-03-11 | 2022-06-11 | 台達電子工業股份有限公司 | Phase-loss detection apparatus of three-phase ac power source and method of detecting phase loss |
| US11567112B2 (en) | 2021-03-11 | 2023-01-31 | Delta Electronics, Inc. | Phase-loss detection apparatus of three-phase AC power source and method of detecting phase loss |
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| CN107796998A (en) * | 2017-11-29 | 2018-03-13 | 中环天仪股份有限公司 | A kind of three-phase power supply phase sequence detection circuit and detection method |
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| TWI767605B (en) * | 2021-03-11 | 2022-06-11 | 台達電子工業股份有限公司 | Phase-loss detection apparatus of three-phase ac power source and method of detecting phase loss |
| US11567112B2 (en) | 2021-03-11 | 2023-01-31 | Delta Electronics, Inc. | Phase-loss detection apparatus of three-phase AC power source and method of detecting phase loss |
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