CN109379795B - Inversion frequency tracking phase-locking control system of induction heating power supply - Google Patents
Inversion frequency tracking phase-locking control system of induction heating power supply Download PDFInfo
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- CN109379795B CN109379795B CN201811447565.9A CN201811447565A CN109379795B CN 109379795 B CN109379795 B CN 109379795B CN 201811447565 A CN201811447565 A CN 201811447565A CN 109379795 B CN109379795 B CN 109379795B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
- H05B2206/02—Induction heating
Abstract
The invention provides an inversion frequency tracking phase-locked control system of an induction heating power supply, which comprises: the system comprises a DSP-CPLD digital control board, and an inversion unit, a resonance load unit and an impedance signal analysis circuit which are respectively and electrically connected with the DSP-CPLD digital control board; the DSP-CPLD digital control board outputs a pulse signal according to a preset resonance frequency sweeping range, outputs the pulse signal to the inverter unit, and drives the inverter unit to output electric energy to the resonance load unit so as to enable the resonance load unit to realize shock oscillation; the impedance signal analysis circuit is used for carrying out resonance reactance detection on the resonance load unit to obtain a detection signal, feeding the detection signal back to the DSP-CPLD digital control board so that the DSP-CPLD digital control board carries out reactance analysis on the induction heating load according to the detection signal, and outputting load resonance frequency pulse for regulating and controlling the operation state of the inverter power device according to the reactance analysis result.
Description
Technical Field
The invention relates to the technical field of induction heating power supplies, in particular to an inversion frequency tracking phase-locked control system of an induction heating power supply.
Background
The design of an inversion frequency tracking phase locking technology in an inverter power supply is one of the key technologies in the field of power supplies. The traditional popular induction heating equipment has the defect that the inversion frequency phase locking is slow and the frequency band is narrow, when the resonance load parameter is changed, the power supply cannot be normally started to work, and the control panel needs to be subjected to parameter adjustment to normally start to work, specifically, the traditional popular induction heating equipment is divided into an operating frequency band (1-100 Hz), a middle frequency band (100-10000 Hz), a super audio frequency band (10000-80000 Hz) and a high frequency band (80000-500000 Hz), but under the condition that the control parameter is not adjusted, only a certain frequency +/-50% range in the frequency band can be controlled in the four frequency bands, if the control parameter is not adjusted, the starting failure or the working instability of the power supply can be caused, and therefore, no effective solution is provided at present.
Disclosure of Invention
The invention provides a novel inversion frequency tracking phase-locking control system of an induction heating power supply based on at least one of the technical problems, and solves the problems that the traditional induction heating equipment is slow in phase-locking starting speed and fails in power starting or unstable in work after load parameters are changed.
In view of the above, the present invention provides an inverter frequency tracking phase-locked control system for an induction heating power supply, comprising: the system comprises a DSP-CPLD digital control board, and an inversion unit, a resonance load unit and an impedance signal analysis circuit which are respectively and electrically connected with the DSP-CPLD digital control board; the DSP-CPLD digital control board outputs a pulse signal according to a preset resonance frequency sweeping range, outputs the pulse signal to the inverter unit, and drives the inverter unit to output electric energy to the resonance load unit so as to enable the resonance load unit to realize shock oscillation; the impedance signal analysis circuit is used for carrying out resonance reactance detection on the resonance load unit to obtain a detection signal, feeding the detection signal back to the DSP-CPLD digital control board so that the DSP-CPLD digital control board carries out reactance analysis on the induction heating load according to the detection signal, and outputting load resonance frequency pulse for regulating and controlling the operation state of the inverter power device according to the reactance analysis result.
In the technical scheme, the DSP-CPLD digital control board outputs a pulse signal to drive the inverter unit to output electric energy to the resonant load unit so as to enable the resonant load unit to realize the shock of the resonant load unit, the impedance signal analysis circuit is used for carrying out resonant reactance detection on the resonant load unit, the DSP-CPLD digital control board carries out reactance analysis on an induction heating load according to a detection signal of the impedance signal analysis circuit and generates load resonant frequency pulses, the DSP-CPLD digital control board can quickly and accurately find a load loop resonance point in the whole process to realize quick and accurate inverter voltage and current phase frequency tracking, and meanwhile, an output load resonant frequency pulse adjustable inverter power device always works in a quasi-resonance state, so that the problems that the traditional induction heating equipment is slow in phase locking starting speed and a power supply fails to start or works unstably after load parameters are changed are solved, and the switching loss of an inversion element is reduced, and the efficiency of a heating power supply is greatly improved.
In the foregoing technical solution, preferably, the DSP-CPLD digital control board outputs a pulse signal according to a preset resonance frequency sweep range, and specifically includes: and the microprocessor in the DSP-CPLD digital control board automatically triggers a PWM pulse signal of which the frequency of the high frequency band changes gradually to the frequency of the low frequency band through a PWM peripheral.
In any one of the above technical solutions, preferably, the resonant load unit includes a series resonant load and a parallel resonant load, and the impedance signal analyzing circuit performs a resonant reactance detection on a resonant current of the series resonant load or performs a reactance detection on a resonant voltage of the parallel resonant load.
In any one of the above technical solutions, preferably, when the pulse signal sent by the DSP-CPLD digital control board is automatically swept to the load resonant frequency range, the impedance signal analyzing circuit feeds back the detection signal to the DSP-CPLD digital control board.
In any one of the above technical solutions, preferably, the inverter unit includes a series resonant inverter bridge and a parallel resonant inverter bridge.
Through the technical scheme, the problems that the traditional induction heating equipment is low in phase locking starting speed and fails in power starting or works unstably after load parameters are changed are solved.
Drawings
Fig. 1 is a block diagram showing a structural schematic diagram of an inverter frequency tracking phase-locked control system of an induction heating power supply according to an embodiment of the present invention;
fig. 2 is a block diagram showing a structural schematic diagram of an inverter frequency tracking phase-locked control system of an induction heating power supply according to another embodiment of the present invention;
FIG. 3 shows a circuit diagram of an impedance signal analyzing circuit according to an embodiment of the invention;
fig. 4 shows a circuit configuration diagram of an inverter unit according to an embodiment of the present invention;
fig. 5 shows a circuit configuration diagram of a resonant load unit according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
The technical solution of the invention is further explained below with reference to fig. 1 to 5:
as shown in fig. 1, the inverter frequency tracking phase-locked control system of the induction heating power supply includes: the digital control circuit comprises a DSP-CPLD digital control board 101, and an inverter unit 102, a resonant load unit 103 and an impedance signal analysis circuit 104 which are respectively and electrically connected with the DSP-CPLD digital control board 101. The impedance signal analyzing circuit 104 is shown in detail in fig. 3, the inverting unit 102 is shown in detail in fig. 4, and the resonant load unit 103 is shown in detail in fig. 5.
Wherein, the DSP-CPLD digital control board 101 outputs a pulse signal according to a preset resonance frequency sweep range and outputs the pulse signal to the inverter unit 102 (in fig. 4, the inverter unit 102 includes a series resonance inverter bridge and a parallel resonance inverter bridge), specifically, the preset resonance frequency sweep range is a preset resonance frequency range from a high frequency band to a low frequency band, a microprocessor is disposed in the DSP-CPLD digital control board 101, the microprocessor automatically triggers a PWM pulse signal of which the high frequency band frequency gradually changes to the low frequency band frequency based on a PWM peripheral, the generated pulse signal drives the inverter unit 102 to output electric energy to the resonant load unit 103, so that the resonant load unit realizes its excitation oscillation, the impedance signal analyzing circuit 104 is configured to perform resonance reactance detection on the resonant load unit 102 to obtain a detection signal, specifically, as shown in fig. 5, the resonant load unit 102 includes a series resonant load, and a parallel resonant load, and a detection signal, The impedance signal analysis circuit 104 performs resonance reactance detection on resonance current of the series resonance load or resonance voltage of the parallel resonance load, and feeds back a detection signal to the DSP-CPLD digital control board 101 when a pulse signal sent by the DSP-CPLD digital control board 101 automatically sweeps to a load resonance frequency range, and the DSP-CPLD digital control board 101 performs reactance analysis on the induction heating load according to the detection signal and outputs a load resonance frequency pulse for regulating and controlling an operation state of the inverter power device according to a reactance analysis result.
In addition, as shown in fig. 2, in practical application, the inverter frequency tracking phase-locked control system of the induction heating power supply is further provided with an incoming line power supply, a power control unit, a power supply filtering unit and a monitoring system of interaction of the DSP-CPLD digital control board.
In the above embodiment, the DSP-CPLD digital control board outputs the pulse signal to drive the inverter unit to output the electric energy to the resonant load unit, so that the resonant load unit realizes its shock, and the impedance signal analyzing circuit performs the resonant reactance detection on the resonant load unit, the DSP-CPLD digital control board performs the reactance analysis on the inductive heating load according to the detection signal of the impedance signal analyzing circuit, and generates the load resonant frequency pulse, the DSP-CPLD digital control board can quickly and accurately find the load loop resonance point in the whole process, so as to realize the quick and accurate inverter voltage and current phase frequency tracking, and the output load resonant frequency pulse can regulate the inverter power device to always work in the quasi-resonance state, thereby solving the problems of slow phase locking starting speed of the conventional inductive heating device and power supply failure or unstable work after changing the load parameter, and the switching loss of an inversion element is reduced, and the efficiency of a heating power supply is greatly improved.
Through practical verification, the inversion frequency tracking phase-locked control system of the induction heating power supply in the embodiment can analyze and judge the correct resonance reactance of any load loop in a power frequency band (1-100 Hz), a middle frequency band (100-10000 Hz), a super audio band (10000-80000 Hz) and a high frequency band (80000-500000 Hz), so as to realize accurate phase locking, the controlled resonance frequency range is from 500000Hz to 10Hz in the power frequency band, and the rapid frequency tracking of inversion and the accurate control of the inversion phase can be met in the frequency range.
The technical scheme of the invention is described in detail in the above with reference to the attached drawings, and the technical scheme of the invention provides a novel inverter frequency tracking phase-locked control system of an induction heating power supply, which solves the problems that the traditional induction heating equipment is slow in phase-locked starting speed and fails in power supply starting or unstable in work after load parameters are changed.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention
Various modifications and alterations of this invention will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An inversion frequency tracking phase-locked control system of an induction heating power supply, comprising:
the system comprises a DSP-CPLD digital control board, and an inversion unit, a resonance load unit and an impedance signal analysis circuit which are respectively and electrically connected with the DSP-CPLD digital control board;
the DSP-CPLD digital control board outputs a pulse signal according to a preset resonance frequency sweeping range, outputs the pulse signal to the inverter unit, and drives the inverter unit to output electric energy to the resonance load unit so as to enable the resonance load unit to realize shock oscillation;
the impedance signal analysis circuit is used for carrying out resonance reactance detection on the resonance load unit to obtain a detection signal, feeding the detection signal back to the DSP-CPLD digital control board so that the DSP-CPLD digital control board carries out reactance analysis on the induction heating load according to the detection signal and outputs a load resonance frequency pulse for regulating and controlling the operation state of the inverter power device according to a reactance analysis result;
and the impedance signal analysis circuit feeds the detection signal back to the DSP-CPLD digital control board when the pulse signal sent by the DSP-CPLD digital control board automatically sweeps to a load resonance frequency range.
2. The system of claim 1, wherein the DSP-CPLD digital control board outputs a pulse signal according to a preset resonant sweep frequency range, and specifically comprises: and the microprocessor in the DSP-CPLD digital control board automatically triggers a PWM pulse signal of which the frequency of the high frequency band changes gradually to the frequency of the low frequency band through a PWM peripheral.
3. The system of claim 1, wherein the resonant load unit comprises a series resonant load and a parallel resonant load, and the impedance signal analyzing circuit performs a resonant reactance detection on a resonant current of the series resonant load or a resonant voltage of the parallel resonant load.
4. The inverter frequency tracking phase-locked control system of the induction heating power supply according to any one of claims 1 to 3, wherein the inverter unit includes a series resonant inverter bridge and a parallel resonant inverter bridge.
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| CN201811447565.9A CN109379795B (en) | 2018-11-29 | 2018-11-29 | Inversion frequency tracking phase-locking control system of induction heating power supply |
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| CN201811447565.9A CN109379795B (en) | 2018-11-29 | 2018-11-29 | Inversion frequency tracking phase-locking control system of induction heating power supply |
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| CN109379795B true CN109379795B (en) | 2021-08-10 |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2456436Y (en) * | 2000-12-13 | 2001-10-24 | 中国科学院金属研究所 | Phaselocked loop HF/MF induction heater |
| CN201967167U (en) * | 2011-01-30 | 2011-09-07 | 盐城市广庆电器有限公司 | Induction heating dual-cycle controller |
| CN102573157A (en) * | 2012-01-18 | 2012-07-11 | 洛阳升华感应加热有限公司 | Frequency self-adaptive circuit of parallel resonant induction heating power supply |
| CN102938948A (en) * | 2012-11-25 | 2013-02-20 | 淄博市临淄银河高技术开发有限公司 | Constant-voltage precisely-controlled induction heating equipment |
| CN103108423A (en) * | 2012-11-14 | 2013-05-15 | 明达实业(厦门)有限公司 | Single tube electromagnetic field generator |
| CN103313451A (en) * | 2013-05-30 | 2013-09-18 | 杨作峰 | Electromagnetic heating circuit utilizing single-chip microcomputer to automatically track resonant frequency |
| WO2014037898A1 (en) * | 2012-09-05 | 2014-03-13 | Andrea Zuccatti | Procedure for the induction heating of industrial and domestic cookers with optimisation of the power supplied |
| CN105472804A (en) * | 2015-12-11 | 2016-04-06 | 洛阳理工学院 | Parallel induction heating power supply inversion feedback circuit and method |
| CN105960042A (en) * | 2016-06-30 | 2016-09-21 | 浙江天煌科技实业有限公司 | Novel composite control system of induction heating power supply |
| CN107135564A (en) * | 2017-07-02 | 2017-09-05 | 中国计量大学 | A kind of pulsed induction heating power of the digital frequency-tracking of modified |
| CN108112106A (en) * | 2017-12-12 | 2018-06-01 | 华茂机械(肇庆)有限公司 | A kind of sensing heating high frequency power supply smart control system |
| CN108768183A (en) * | 2018-05-16 | 2018-11-06 | 中国计量大学 | Broadband induction heating power based on resonant frequency tracking |
-
2018
- 2018-11-29 CN CN201811447565.9A patent/CN109379795B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2456436Y (en) * | 2000-12-13 | 2001-10-24 | 中国科学院金属研究所 | Phaselocked loop HF/MF induction heater |
| CN201967167U (en) * | 2011-01-30 | 2011-09-07 | 盐城市广庆电器有限公司 | Induction heating dual-cycle controller |
| CN102573157A (en) * | 2012-01-18 | 2012-07-11 | 洛阳升华感应加热有限公司 | Frequency self-adaptive circuit of parallel resonant induction heating power supply |
| WO2014037898A1 (en) * | 2012-09-05 | 2014-03-13 | Andrea Zuccatti | Procedure for the induction heating of industrial and domestic cookers with optimisation of the power supplied |
| CN103108423A (en) * | 2012-11-14 | 2013-05-15 | 明达实业(厦门)有限公司 | Single tube electromagnetic field generator |
| CN102938948A (en) * | 2012-11-25 | 2013-02-20 | 淄博市临淄银河高技术开发有限公司 | Constant-voltage precisely-controlled induction heating equipment |
| CN103313451A (en) * | 2013-05-30 | 2013-09-18 | 杨作峰 | Electromagnetic heating circuit utilizing single-chip microcomputer to automatically track resonant frequency |
| CN105472804A (en) * | 2015-12-11 | 2016-04-06 | 洛阳理工学院 | Parallel induction heating power supply inversion feedback circuit and method |
| CN105960042A (en) * | 2016-06-30 | 2016-09-21 | 浙江天煌科技实业有限公司 | Novel composite control system of induction heating power supply |
| CN107135564A (en) * | 2017-07-02 | 2017-09-05 | 中国计量大学 | A kind of pulsed induction heating power of the digital frequency-tracking of modified |
| CN108112106A (en) * | 2017-12-12 | 2018-06-01 | 华茂机械(肇庆)有限公司 | A kind of sensing heating high frequency power supply smart control system |
| CN108768183A (en) * | 2018-05-16 | 2018-11-06 | 中国计量大学 | Broadband induction heating power based on resonant frequency tracking |
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