CN203120197U - Full air cooling type digital induction heating power supply - Google Patents
Full air cooling type digital induction heating power supply Download PDFInfo
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- CN203120197U CN203120197U CN2013200877813U CN201320087781U CN203120197U CN 203120197 U CN203120197 U CN 203120197U CN 2013200877813 U CN2013200877813 U CN 2013200877813U CN 201320087781 U CN201320087781 U CN 201320087781U CN 203120197 U CN203120197 U CN 203120197U
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- circuit
- power supply
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- air cooling
- induction heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses a full air cooling type digital induction heating power supply, which comprises a main circuit and a control circuit used for controlling the main circuit. The full air cooling type digital induction heating power supply is characterized in that the control circuit comprises a second circuit breaker. The input end of the second circuit breaker is connected with a control power supply, while the output end of the second circuit breaker is connected with a cooling fan. The air cooling effect on a three-phase bridge type rectifier circuit, an IGBT inverter bridge, a transformer and a resonant capacitor bank is realized by means of the cooling fan, wherein the transformer and the resonant capacitor bank are arranged in a resonant output circuit. The cooling fan is connected with a switching power supply. The switching power supply is connected with a DSP master control unit. The DSP master control unit is respectively connected with a display and key unit, and an IGBT isolation drive unit. The IGBT isolation drive unit is connected with the IGBT inverter bridge. According to the technical scheme of the utility model, the interior of the power supply is subjected to the air cooling process instead of the water cooling process. Meanwhile, the digital control over the power supply is realized by means of a DSP controller and a CPLD controller. Therefore, the large-power rectification, inversion, isolation and resonance can be efficiently realized.
Description
Technical field
The utility model relates to a kind of resonant mode induction heating power, be the power electronic product in the electric equipment field, can with efficient, fast, the method for non-contact inductive heating realizes that metal heat treatmet, forge hot, welding, melting, hot charging be joined, heat in crystal growth and the various stove.
Background technology
It is analog that present employed induction heating power is generally water-cooled, and there is following defective usually in it: 1) water system failure rate height, to leak, obstruction, pipeline problem of aging be many, and reliability is lower.2) electrical efficiency is low, power factor (PF) is low, harmonic wave is big, water consumption is big.3) can not be little from motion tracking or following range.4) control is inaccurate, and fluctuation of service can not no-load running.5) inversion element IGBT damages easily, and equipment life is short.
Summary of the invention
The purpose of this utility model provides a kind of thorough elimination water system fault, and operation is induction heating power efficiently and accurately and reliably.
In order to achieve the above object, the technical solution of the utility model has provided the digital induction heating power of a kind of full air cooling, comprise that major loop reaches the control loop that is used for the control major loop, major loop comprises first circuit breaker, first circuit breaker connects three-phase bridge rectifier circuit via device for fusing, the output of three-phase bridge rectifier circuit connects charging buffer circuit or DC chopper circuit, charging buffer circuit or DC chopper circuit connect inversion filter capacitor group, inversion filter capacitor group connects the IGBT inverter bridge by the high frequency absorptive unit, the output of IGBT inverter bridge connects resonance output circuit, it is characterized in that: control loop comprises second circuit breaker, the input of second circuit breaker connects the control power supply, its output connects cooling blower, by cooling blower to three-phase bridge rectifier circuit, the IGBT inverter bridge, transformer in the resonance output circuit and resonant capacitor group are carried out air-cooled, cooling blower connects Switching Power Supply, Switching Power Supply connects the DSP main control unit, the DSP main control unit connects demonstration and push-button unit and IGBT isolation drive unit respectively, and IGBT isolation drive unit connects the IGBT inverter bridge.
Preferably, described device for fusing is first fusible link and second fusible link that is connected on the described first circuit breaker output.
Preferably, the output at described three-phase bridge rectifier circuit is parallel with filter capacitor.
Preferably, between described charging buffer circuit or described DC chopper circuit and described inversion filter capacitor group, be in series with filter inductance.
Preferably, described charging buffer circuit is made of buffering contactor and buffering resistance, and described DC chopper circuit is made of IGBT, fly-wheel diode and reactor.
Preferably, described high frequency absorptive unit is that first high frequency in parallel absorbs electric capacity and second high frequency absorbs electric capacity, and first high frequency absorbs electric capacity and second high frequency absorption electric capacity is connected in parallel on the output of described inversion filter capacitor group.
Preferably, described resonance output circuit comprises intermediate frequency transformer, and the elementary winding of intermediate frequency transformer connects capacitance, is connected with the resonant capacitor group at the secondary winding of intermediate frequency transformer.
Preferably, described cooling blower has four, and wherein two cooling blowers are used for described three-phase bridge rectifier circuit and described IGBT inverter bridge are carried out air-cooled, and two other is used for carrying out air-cooled to transformer and the resonant capacitor group of described resonance output circuit.
Internal power electronic device of the present utility model, transformer and resonant capacitor all adopt air cooling technique, power supply inside does not need water flowing, and adopt dsp controller and CPLD to carry out digital control, can finish power rectifier, inversion, isolation and resonance expeditiously.Compare with traditional water flowing cooling induction heating power, the utlity model has high efficiency, high reliability, long-life, characteristics such as easy to maintenance; Simultaneously, the utility model also have control accurately, can from motion tracking, stable, have characteristics such as digital interface and interface, multiple operation and control model, accommodation is wide.
Description of drawings
Fig. 1 is the circuit diagram of if architectures major loop;
Fig. 2 is the circuit diagram of high-frequency structure major loop;
Fig. 3 is the circuit diagram of control loop;
Fig. 4 is the warning circuit schematic diagram.
Embodiment
For the utility model is become apparent, now with preferred embodiment, and conjunction with figs. is described in detail below.
Major loop of the present utility model has two kinds of versions: if architectures and high-frequency structure.As shown in Figure 1, the if architectures major loop comprises the first circuit breaker K1, and three-phase 380VAC power supply enters the first circuit breaker K1 and is connected to three-phase bridge rectifier circuit BD1 by the first fusible link F1 and the second fusible link F2.Filter capacitor C1 in parallel on the output of three-phase bridge rectifier circuit BD1.Outlet side at three-phase bridge rectifier circuit BD1 adopts filter capacitor C1, can improve power factor (PF), the reduction output current harmonics of power supply.Constitute the charging buffer circuit by buffering contactor K2 and buffering resistance R B1 are public, the effect of charging buffer circuit is the rush of current of eliminating when powering on input circuit and three-phase bridge rectifier circuit BD1, and reduces impact and interference to electrical network.The charging buffer circuit connects inversion filter capacitor group GCA2 via filter inductance L1.Be connected the IGBT inverter bridge after the output of inversion filter capacitor group GCA2 first high frequency in parallel absorbs capacitor C 2 and second high frequency absorbs capacitor C 3, the IGBT inverter bridge connects resonance output circuit.Resonance output circuit comprises intermediate frequency transformer T1, and the elementary winding of intermediate frequency transformer T1 connects capacitance C4, and its secondary winding connects inductor T by the resonant capacitance group.
In conjunction with Fig. 2, on version, the difference of high-frequency structure major loop and if architectures major loop is to adopt DC chopper circuit to replace the charging buffer circuit.The DC chopper circuit major loop is made of IGBT, sustained diode 1 and reactor L1, and therefore, the inversion side direct voltage of high-frequency structure can be regulated.Other parts circuit and the principle of high-frequency structure are identical with the if architectures major loop.
The control loop of if architectures major loop and high-frequency structure major loop comprises the second circuit breaker CK1 as shown in Figure 3, and 220VAC control power supply is connected to the second circuit breaker CK1.The output of the second circuit breaker CK1 connects four cooling blowers respectively, namely the first cooling blower FUN1, the second cooling blower FUN2, the 3rd cooling blower FUN3 and the 4th cooling blower FUN4 wherein two cooling blowers be used for the cooling of major loop power electronic device (three-phase bridge rectifier circuit BD1 and IGBT inverter bridge), two other is used for the cooling of intermediate frequency transformer T1 and resonant capacitor group, this full air cooling structure makes power supply inside not need water flowing, therefore can thoroughly eliminate the water system fault.
Cooling blower connects internal switch power supply SPOW by the coil K2 of buffering contactor and the relay contact K3 of control buffering contactor.Internal switch power supply SPOW connects the DSP main control unit, and the DSP main control unit is core cell of the present utility model, and all measurements, operation, control, protection, input and output are all finished at the DSP main control unit.The DSP main control unit connects and shows and push-button unit, and operating personnel are by showing and push-button unit complete operation and interface display.The DSP main control unit also links to each other with IGBT isolation drive unit, and IGBT isolation drive unit connects the IGBT inverter bridge in the major loop.The IGBT inverter bridge is finished the unsteady flow conversion under the control of DSP main control unit, convert direct voltage to midfrequent AC voltage, and the frequency of midfrequent AC voltage is just in time consistent with resonant capacitance group and the resonance frequency of inductor in the resonance output circuit, and the current over-zero that phase place then satisfies IGBT switches.
As shown in Figure 4, warning circuit comprises alarm condition indicator light LA2, in parallel with 24VDC power supply indicator LA1 behind the contact K2.2 of alarm condition indicator light LA2 series coil K2, it is in parallel with 24VDC power supply indicator LA1 after the relay K 3 of control buffering contactor is connected with its contact K3.2,24VDC control power supply is connected in parallel on 24VDC power supply indicator LA1 two ends,, contact K2.2 and contact K3.2 are subjected to the control of DSP main control unit, when device took place to report to the police, LA2 was bright for the alarm condition indicator light.
Realize that key technology of the present utility model is to realize high efficiency low-loss conversion in inversion, isolation and resonance link, this also is that full air cooling technique is able to the basis that may implement simultaneously.
In the inversion link, the switching loss that reduces the IGBT inverter bridge is crucial, the utility model adopts the Zero Current Switch scheme, under accurate, the quick control of DSP main control unit, can guarantee under various operating modes, to realize Zero Current Switch, accurately follow the tracks of resonance frequency, not produce phase deviation, and by reducing Dead Time, improve actuating speed, selecting measure such as quick type IGBT for use, low-loss and steady I GBT inversion have been guaranteed.Isolating and the impedance matching link, the utility model has adopted high frequency ferrite or ultracrystallite iron-core transformer, and adopts high frequency cable to make winding to reduce eddy current loss, to adopt structural design and the processing transformer that reduces leakage inductance and improve heat-sinking capability.In the resonance link, resonant capacitor group of the present utility model adopts a plurality of air cooling polypropylene film capacitors, substitute traditional water-cooled capacitor for electric induction heating system, with the mode connection in series-parallel combination that reduces leakage inductance, reduces induction loss, improves heat-sinking capability, to obtain the resonance output of low-loss, high voltage and big electric current.
The utility model also has following characteristics:
Adopt zero current (ZCS) circuit to realize high-frequency low-consumption IGBT inversion, can follow the tracks of the variation of load fast accurately, in time adjust reverse frequency and phase place; Eliminate the defective that present ubiquitous IGBT inversion breaks away from the ZCS pattern easily, therefore solved the problem that IGBT damages easily.
More analog control mode is compared, and system all obviously improves on performances such as tracking velocity, tracking accuracy, integrated protection ability, efficient.
System adopts the quick IGBT drive circuit of innovation, compares with existing drive circuit, can obviously improve harmonic wave, reduces Dead Time, and further reduces switching loss, increases the stability that high frequency is followed the tracks of inversion; Have short-circuit protection and under-voltage protection function simultaneously.
In accident protection or take place that current supply circuit is cut soon or the flickering situation under, device can be monitored automatically, and resumes operation automatically, avoids shutting down the production loss that causes.
Device internal PID program is fit to the temperature closed loop operation, also can realize heating up and cooling rate control.Owing to adopt digital control, adapts to the various fast and at a slow speed occasions of variations in temperature, temperature-time constant scope from 1 second to tens thousand of seconds, and can on-line tuning.
Have permanent output current operation, the operation of permanent power output, temperature closed loop operation, four kinds of operational modes of partition running.
Device provides optional inductor discharge to detect and the low defencive function of discharge, can monitor inductor discharge in real time, and the protection value can arrange arbitrarily.
Realize that power output 0-100% is adjustable continuously.
Perfect protection limitation function device has short circuit, overload, overvoltage, overcurrent, overheat protector and limitation function, has transformer state and detects.
Install configurable RS232/RS485C interface and communications protocol, support the MODBUS agreement, by RS232/RS485, can realize Communication Control, and move with other equipment coordinations, finish the special process control of heating target.
Device adopts the high brightness lattice display unit, the available in Chinese display interface, and display operation is simple, and the interface is user friendly.
Parameters such as the operation control of device, limiting protecting all can onlinely arrange, and the parameter that the outage back arranges is not lost.
Device can be recorded in warning and the event of failure that takes place in the running, and the event of all preservations all can be inquired about at system's display unit.
The user interface of device comprises digital quantity input/output interface, the relay tip output interface of isolation, the analog quantity input interface of isolation.
By user interface, can realize functions such as distant place control, central authorities' control easily.
Claims (8)
1. digital induction heating power of full air cooling, comprise that major loop reaches the control loop that is used for the control major loop, major loop comprises first circuit breaker (K1), first circuit breaker (K1) connects three-phase bridge rectifier circuit (BD1) via device for fusing, the output of three-phase bridge rectifier circuit (BD1) connects charging buffer circuit or DC chopper circuit, charging buffer circuit or DC chopper circuit connect inversion filter capacitor group (GCA2), inversion filter capacitor group (GCA2) connects the IGBT inverter bridge by the high frequency absorptive unit, the output of IGBT inverter bridge connects resonance output circuit, it is characterized in that: control loop comprises second circuit breaker (CK1), the input of second circuit breaker (CK1) connects the control power supply, its output connects cooling blower, by cooling blower to three-phase bridge rectifier circuit (BD1), the IGBT inverter bridge, transformer in the resonance output circuit (T1) and resonant capacitor group are carried out air-cooled, cooling blower connects Switching Power Supply (SPOW), Switching Power Supply (SPOW) connects the DSP main control unit, the DSP main control unit connects demonstration and push-button unit and IGBT isolation drive unit respectively, and IGBT isolation drive unit connects the IGBT inverter bridge.
2. the digital induction heating power of a kind of full air cooling as claimed in claim 1 is characterized in that: described device for fusing is for being connected on first fusible link (F1) and second fusible link (F2) on described first circuit breaker (K1) output.
3. the digital induction heating power of a kind of full air cooling as claimed in claim 1, it is characterized in that: the output at described three-phase bridge rectifier circuit (BD1) is parallel with filter capacitor (C1).
4. the digital induction heating power of a kind of full air cooling as claimed in claim 1 is characterized in that: be in series with filter inductance (L1) between described charging buffer circuit or described DC chopper circuit and described inversion filter capacitor group (GCA2).
5. the digital induction heating power of a kind of full air cooling as claimed in claim 1, it is characterized in that: described charging buffer circuit is made of buffering contactor (K2) and buffering resistance (RB1), and described DC chopper circuit is made of IGBT, fly-wheel diode (D1) and reactor (L1).
6. the digital induction heating power of a kind of full air cooling as claimed in claim 1, it is characterized in that: described high frequency absorptive unit absorbs electric capacity (C2) for first high frequency in parallel and second high frequency absorbs electric capacity (C3), and first high frequency absorption electric capacity (C2) and second high frequency absorb electric capacity (C3) and be connected in parallel on the output of described inversion filter capacitor group (GCA2).
7. the digital induction heating power of a kind of full air cooling as claimed in claim 1, it is characterized in that: described resonance output circuit comprises intermediate frequency transformer (T1), the elementary winding of intermediate frequency transformer (T1) connects capacitance (C4), is connected with the resonant capacitor group at the secondary winding of intermediate frequency transformer (T1).
8. the digital induction heating power of a kind of full air cooling as claimed in claim 1, it is characterized in that: described cooling blower has four, wherein two cooling blowers are used for described three-phase bridge rectifier circuit (BD1) and described IGBT inverter bridge are carried out air-cooled, and two other is used for carrying out air-cooled to transformer (T1) and the resonant capacitor group of described resonance output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200877813U CN203120197U (en) | 2013-02-26 | 2013-02-26 | Full air cooling type digital induction heating power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200877813U CN203120197U (en) | 2013-02-26 | 2013-02-26 | Full air cooling type digital induction heating power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203120197U true CN203120197U (en) | 2013-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200877813U Expired - Fee Related CN203120197U (en) | 2013-02-26 | 2013-02-26 | Full air cooling type digital induction heating power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203120197U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105025607A (en) * | 2014-04-29 | 2015-11-04 | 张家港市塘桥镇鹿苑钢华高频电子厂 | Dry type induction heating device |
| CN112406566A (en) * | 2020-11-10 | 2021-02-26 | 中车大同电力机车有限公司 | Locomotive power source circuit system |
-
2013
- 2013-02-26 CN CN2013200877813U patent/CN203120197U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105025607A (en) * | 2014-04-29 | 2015-11-04 | 张家港市塘桥镇鹿苑钢华高频电子厂 | Dry type induction heating device |
| CN112406566A (en) * | 2020-11-10 | 2021-02-26 | 中车大同电力机车有限公司 | Locomotive power source circuit system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20190226 |