CN204259197U - For the digitlization inverter controller of electromagnetic induction heating power supply - Google Patents
For the digitlization inverter controller of electromagnetic induction heating power supply Download PDFInfo
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- CN204259197U CN204259197U CN201420743087.7U CN201420743087U CN204259197U CN 204259197 U CN204259197 U CN 204259197U CN 201420743087 U CN201420743087 U CN 201420743087U CN 204259197 U CN204259197 U CN 204259197U
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Abstract
The utility model provides a kind of digitlization inverter controller for electromagnetic induction heating power supply, it comprises DSP module, described DSP module comprises CPU minimum system, and is connected to communication interface unit, analog to digital converter, digital to analog converter and the photoelectric coupling input and output unit on described CPU minimum system; The FPGA module be connected via parallel bus with described DSP module, described FPGA module comprises the zero cross detection circuit, phase-locked regulating circuit and the pulse generating circuit that are connected successively; And the external interface module be connected on the input/output terminal of described DSP module and FPGA module.Digitlization inverter controller for electromagnetic induction heating power supply described in the utility model, can solve the deficiency of pure hardware circuit regulative mode, improves the reliability of controller.
Description
Technical field
The utility model relates to electric and electronic technical field, particularly a kind of digitlization inverter controller for electromagnetic induction heating power supply.
Background technology
The natural resonance frequency that electromagnetic induction heating power supply controller exports driving pulse frequency and load circuit close to time, load circuit work is in quasi-resonance state, and now the power factor of system is close to 1, and the operating efficiency of power supply is the highest.Electromagnetic induction heating power supply is in metal works heating process, the physical property of metal works can change with the rising of temperature, as conductivity, magnetic permeability etc., equivalent parameters such as inductance, electric capacity, the resistance of load also can change thereupon, thus can change the natural resonance frequency of load circuit.In actual applications, power supply needs according to the change of load circuit equivalent parameters and the difference of heating process, the driving pulse frequency of real-time conditioning controller, and the operating frequency of power supply is stabilized near load circuit natural resonance frequency, to improve the operating efficiency of power supply.The traditional design mode of inverter controller adopts pure hardware circuit, in actual applications due to the difference of load equivalent parameter and production technology, the scope of load resonant frequency change is very wide, in order to improve the operating efficiency of power supply, need to adjust pulse frequency and load circuit natural frequency that resistance in hardware circuit or capacitance parameter export with matching controller, very inconvenient when this uses at the scene.And circuit board needs the potentiometer that regulates a lot, operate also more loaded down with trivial details, the simulation discrete device on circuit is as also more in adjustable potentiometer etc., and these device precision are poor, also can affect the reliability of circuit board.
Utility model content
In view of this, the utility model is intended to propose a kind of digitlization inverter controller for electromagnetic induction heating power supply, to solve the deficiency of pure hardware circuit regulative mode, improves the reliability of controller.
For achieving the above object, the technical solution of the utility model is achieved in that
For a digitlization inverter controller for electromagnetic induction heating power supply, it comprises:
DSP module, described DSP module comprises CPU minimum system, and the communication interface unit, analog to digital converter, digital to analog converter and the photoelectric coupling input and output unit that are connected on described CPU minimum system, described DSP module is connected with display and operation module via communication interface unit;
FPGA module, be connected via parallel bus with described DSP module, described FPGA module comprises the zero cross detection circuit, the phase-locked regulating circuit that are connected successively, the FPGA processor be connected with phase-locked regulating circuit, and is connected to the pulse generating circuit on FPGA processor;
External interface module, is connected on the input/output terminal of described DSP module and FPGA module.
Further, described CPU minimum system comprises floating type dsp processor, watchdog circuit and nonvolatile memory EEPROM.
Further, described communication interface unit comprises 2 road RS485 interfaces and 1 road optical fiber interface.
Further, described analog to digital converter is the 4 passage analog to digital conversion circuits of a road-10V ~+10V, and described digital to analog converter is the 2 port number analog conversion circuits of a road 0V ~+10V; Described analog to digital converter is connected with floating type dsp processor via SPI serial line interface with digital to analog converter.
Further, described floating type dsp processor connects display and operation device via RS485 interface.
Further, described display and operation device is integral type touch-screen.
Relative to prior art, the utility model has following advantage:
This is used for the digitlization inverter controller of inductive electromagnetic heating power supply, by the architectural schemes of DSP+FPGA, and arranged by the parameter of display and operation module to DSP module, thus the flexible that can realize controller, avoid the deficiency of existing pure hardware circuit regulative mode, the minimizing of hardware operation also improves the reliability of controller.Watchdog circuit can ensure the normal operation of controller, and nonvolatile memory is used for the stable storage of pre-set parameter.The communication that RS485 interface can realize between controller with various external module with optical fiber interface is connected.It is convenient and easy that display and operation module adopts integrated touch screen that controller parameter can be made to arrange, and improves the practicality of controller.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structured flowchart of the digitlization inverter controller for electromagnetic induction heating power supply described in the utility model embodiment.
Embodiment
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
The present embodiment relates to a kind of digitlization inverter controller for electromagnetic induction heating power supply, as shown in fig. 1, it comprises DSP module, with the FPGA module that DSP module is connected via parallel bus, and is connected to the external interface module on the input/output terminal of DSP module and FPGA module.DSP module comprises CPU minimum system, and the communication interface unit, analog to digital converter, digital to analog converter and the photoelectric coupling input and output unit that are connected on CPU minimum system, DSP module is also connected with not shown display and operation module via communication interface unit.FPGA module then comprises the zero cross detection circuit, the phase-locked regulating circuit that are connected successively, the FPGA processor be connected with phase-locked regulating circuit, and is connected to the pulse generating circuit on FPGA processor.
In the present embodiment, the CPU minimum system of DSP module comprises watchdog circuit, nonvolatile memory EEPROM, and floating type dsp processor.In the present embodiment, floating type dsp processor can adopt TMS320F28335 chip, and FPGA module then can adopt XC3S400 chip.Communication interface unit in DSP module also comprises 2 road RS485 interfaces and 1 road optical fiber interface, and the 4 passage analog to digital conversion circuits of analog to digital converter Ze Wei mono-tunnel-10V ~+10V, digital to analog converter is the 2 port number analog conversion circuits of a road 0V ~+10V, analog to digital converter is connected with floating type dsp processor via SPI serial line interface with digital to analog converter, and digital to analog converter can be employing TY5618 chip in the present embodiment, analog to digital converter then can adopt AD7606 chip.Display and operation module is also for be connected on dsp processor via RS485 interface, and this display and operation module can be employing integrated touch screen.Certain display and operation module is except can be integrated touch screen, and it also can be the HMI parts that other can carry out data display and optimum configurations.
Dsp processor is connected with commutation controller by optical-fibre communications, to receive the phase shift instruction that commutation controller sends, then via parallel bus, this instruction can be passed to FPGA processor, perform for FPGA processor, dsp processor also can send the fault message of inverter circuit to commutation controller simultaneously.Transmit display data and pre-set parameter via RS485 communication between dsp processor and integrated touch screen, pre-set parameter is stored in the nonvolatile memory in DSP module, to guarantee the stability of parameter adjustment.Analog to digital conversion circuit sends dsp processor to after the collection signals such as the temperature at scene, Hall can being transformed, and the signal that dsp processor is also produced by D/A converting circuit sends analog signal processing circuit to and performs.
The fault-signal that outside can send by photoelectric coupling input and output unit carries out light-coupled isolation and level conversion, controls FPGA module take real-time hardware protection to make dsp processor.FPGA module can gather the voltage and current signal of load circuit, and can export inversion pulse according to the control signal of dsp processor.Wherein the zero cross detection circuit of FPGA module comprises the parallel zero-crossing comparator in 2 tunnels, to carry out zero passage detection to load circuit voltage sampling signal, the sampled signal that zero cross detection circuit exports is sent to phase-locked regulating circuit again and carries out PI adjustment, sampled signal sends into FPGA processor to produce the output pulse with dead band afterwards, and finally exports via after pulse generating circuit isolation and amplification.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (6)
1., for a digitlization inverter controller for electromagnetic induction heating power supply, it is characterized in that comprising:
DSP module, described DSP module comprises CPU minimum system, and the communication interface unit, analog to digital converter, digital to analog converter and the photoelectric coupling input and output unit that are connected on described CPU minimum system, described DSP module is connected with display and operation module via communication interface unit;
FPGA module, be connected via parallel bus with described DSP module, described FPGA module comprises the zero cross detection circuit, the phase-locked regulating circuit that are connected successively, the FPGA processor be connected with phase-locked regulating circuit, and is connected to the pulse generating circuit on FPGA processor;
External interface module, is connected on the input/output terminal of described DSP module and FPGA module.
2. the digitlization inverter controller for electromagnetic induction heating power supply according to claim 1, is characterized in that: described CPU minimum system comprises floating type dsp processor, watchdog circuit and nonvolatile memory EEPROM.
3. the digitlization inverter controller for electromagnetic induction heating power supply according to claim 2, is characterized in that: described communication interface unit comprises 2 road RS485 interfaces and 1 road optical fiber interface.
4. the digitlization inverter controller for electromagnetic induction heating power supply according to claim 2, it is characterized in that: described analog to digital converter is the 4 passage analog to digital conversion circuits of a road-10V ~+10V, described digital to analog converter is the 2 port number analog conversion circuits of a road 0V ~+10V; Described analog to digital converter is connected with floating type dsp processor via SPI serial line interface with digital to analog converter.
5. the digitlization inverter controller for electromagnetic induction heating power supply according to claim 2, is characterized in that: described floating type dsp processor connects display and operation device via RS485 interface.
6. the digitlization inverter controller for electromagnetic induction heating power supply according to claim 5, is characterized in that: described display and operation device is integral type touch-screen.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420743087.7U CN204259197U (en) | 2014-12-02 | 2014-12-02 | For the digitlization inverter controller of electromagnetic induction heating power supply |
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| CN201420743087.7U CN204259197U (en) | 2014-12-02 | 2014-12-02 | For the digitlization inverter controller of electromagnetic induction heating power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109041311A (en) * | 2018-08-13 | 2018-12-18 | 中国科学院长春光学精密机械与物理研究所 | A kind of adaptive digital locking phase controller |
| CN110445408A (en) * | 2019-08-22 | 2019-11-12 | 湖南智汇科技有限公司 | The control system of 10~300kHz broadband is adjustable Inverting digital power supply |
| CN112074029A (en) * | 2020-09-02 | 2020-12-11 | 沈阳工程学院 | Induction heating power supply circuit |
-
2014
- 2014-12-02 CN CN201420743087.7U patent/CN204259197U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109041311A (en) * | 2018-08-13 | 2018-12-18 | 中国科学院长春光学精密机械与物理研究所 | A kind of adaptive digital locking phase controller |
| CN109041311B (en) * | 2018-08-13 | 2021-04-06 | 中国科学院长春光学精密机械与物理研究所 | Self-adaptive digital phase-locked controller |
| CN110445408A (en) * | 2019-08-22 | 2019-11-12 | 湖南智汇科技有限公司 | The control system of 10~300kHz broadband is adjustable Inverting digital power supply |
| CN112074029A (en) * | 2020-09-02 | 2020-12-11 | 沈阳工程学院 | Induction heating power supply circuit |
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