CN2182505Y - Whole-transistor type high frequency electric source apparatus for induction heating use - Google Patents
Whole-transistor type high frequency electric source apparatus for induction heating use Download PDFInfo
- Publication number
- CN2182505Y CN2182505Y CN 94225167 CN94225167U CN2182505Y CN 2182505 Y CN2182505 Y CN 2182505Y CN 94225167 CN94225167 CN 94225167 CN 94225167 U CN94225167 U CN 94225167U CN 2182505 Y CN2182505 Y CN 2182505Y
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- high frequency
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- General Induction Heating (AREA)
Abstract
The utility model relates to a whole-transistor type high frequency electric source apparatus for induction heating use for high frequency heating. The utility model makes use of a field controlling power electronic device to solve the disadvantages that the existing high frequency heating apparatuses have low oscillation mode and overall efficiency and big volume. A single-phase bridge inverter which is composed of a plurality of the parallel connections of each arm is connected with a load loop after matching with a high frequency transformer. The utility model has the technical proposal which is composed of a sampling unit, a frequency control unit, an extra free running conversion magnifying unit and a driving and protecting display unit for maintaining the normal of load resonance. Power supply devices made by the utility model has high working frequency and large power. The utility model is suitable for other heating occasions besides metallothermic processing and smelting.
Description
The utility model relates to a kind of high-frequency heating power device, especially supplies with Metal Melting, surface hardening, metal solder and semi-conducting material refining, purifies and waits the equipment that uses.
Traditional induction heating power device, mostly be electron tubes type or controllable silicon formula, the single-stage self-excited oscillator that this equipment is made of the former, the high voltage direct current electric energy is being converted in the high-frequency ac electric energy process, the filament of oscillating tube, grid and plate need consume big energy, make its oscillation efficiency only can maintain about in the of 70%, overall efficiency maintains about 50%, particularly also to provide transformer and the high voltage direct current rectifier that the power frequency low tension is risen to into high-tension electricity for it, cause equipment volume to increase the cost height.
In order to overcome above-mentioned shortcoming, people once proposed a kind of frequency converter that utilizes controllable silicon to form, though this frequency converter can make overall efficiency improve, operating frequency is difficult to do height, made practical function desirable not to the utmost.
The purpose of this utility model is that a kind of high frequency, efficient, high-power, energy-conservation, safe and reliable all-transistor formula induction heating high intensity light source will be provided.
In order to solve above-mentioned task, the solution that the utility model adopts is: utilize and hand over--directly--mapping mode of friendship uses a control power electronic device to form a kind of high intensity light source, has in this device:
A single-phase bridge type inverter that constitutes by the field a plurality of parallel connections of the control every arm of power electronic device, this inverter links to each other with the series resonant circuit of being made up of heater coil and resonant capacitor;
A frequency plot controller of taking from feedback sample voltage divider frequency signal, its signal after with suitable phase shift is presented to separate excitation self-excitation transducer, amplifies through amplifier, gives driver again, change according to the load circuit natural frequency, control single-phase bridge type inverter and do orderly switch work;
Both accepted from frequency plot controller for one, and the signal after comparing through frequency detector and setpoint frequency scope, accept inverter failure again, the protection and the display of the overcurrent and the information of cutting off the water supply, it presents aforesaid protection command signal to starter controller, exceed setting range or inverter failure occurs when detecting operating frequency, overcurrent or when abnormal conditions such as cutting off the water supply, sending blocking instruction by starter controller presents to amplifier, this starter controller is connected to the heating instruction in addition and converts this order to initiating signal and presents to separate excitation self-excitation transducer, makes its system works;
This supply unit also is provided with a high frequency transformer that is connected between single-phase bridge type inverter and the load resonant circuit, and a local oscillator produces signal and directly delivers to separate excitation self-excitation transducer, makes its system's starting work;
High frequency transformer in this supply unit (7) adopts ferrite core to make, its primary and secondary coil has tap, change its primary and secondary turn ratio whereby and adjust the load impedance coupling, and but the high frequency transformer of mat respective numbers is coupled in same load resonant loop with a plurality of bridge-type inverters and makes power output stack synthetic, to obtain the output of super high power high frequency.
Technical scheme provided by the utility model compared with prior art has following progress:
1, owing to adopt a control power electronic device to form such scheme, conversion efficiency improves, and ac input power reduces, and consumption of cooling-water descends.
2, because oscillating part adopts the high power solid state device, save huge high-voltage rectifying transformer, make it that this body is long-pending little, in light weight, cost is low.
3, make power supply owing to directly quote the power frequency low-voltage, reduce the fault that causes because of insulation, make its security of operation, reliable.
4, owing to be provided with the adjustable high frequency transformer of output no-load voltage ratio in this programme, the adaptation loading range is widened, adjusted easy.
5, this machine also has the cooling time of saving after giving hot time and operation and finishing, long service life.
6, this machine is convenient to realize seriation, blocking and unitization, has install to replace easily and repair and maintenance characteristics easily.
Fig. 1 has provided all-transistor formula induction heating described in the utility model high intensity light source electrical principle block diagram.
Below in conjunction with accompanying drawing the utility model is further described:
All-transistor formula induction heating is with high intensity light source as seen from Figure 1: a work loop is arranged, and this loop is by feedback sample voltage divider (10), frequency plot controller (11), separate excitation self-excitation transducer (3), amplifier (4), driver (5A～5D), single-phase bridge type inverter (6A～6D), high frequency transformer (7), capacitor (9) and heater coil (8) formation; Individual control loop is arranged, and this loop is made up of local oscillator (1) frequency detector (12) starter controller (2) and protection and display (13).
Make the setting frequency of separate excitation f of local oscillator (1) generation when input heating instruction (Q)
0Instruct through separate excitation self-excitation transducer (3) as initial operating frequency fwi by starting to work, defeated through amplifier (4), the instruction (H) that starts to work of sending simultaneously by starter controller (2), rectifier power source E is connected, add to single-phase bridge type inverter (6) as operating voltage, frequency signal (fw) by amplifier (4) output, make driver (5A, 5D, with 5B, 5C) alternately open, disconnected, the corresponding brachium pontis transistor of driver single-phase bridge type inverter (6) (6A, 6D and 6B, 6C) alternately turn on and off, high-frequency current is used for the load circuit resonance heating of being made up of heater coil (8) and resonant capacitor (9) just through high frequency transformer (7) output.The initialization frequency signal (f1) that is detected by sampling voltage divider (10) feeds back to frequency plot controller (11); through suitably being defeated by separate excitation self-excitation transducer (3) after the phase shift; and be automatically converted to self-excitation work; the operating frequency of Xing Chenging (fw) is operated on the load circuit resonance frequency single-phase bridge type inverter (6) thus; be provided with frequency detector (12) and protection and display (13) in addition, give the highest permission operating frequency (f that sets earlier when operating frequency exceeds frequency detector
H) or minimum permission operating frequency (f
L) time, make protection and display (13) send protection instruction (G).Protection and display (13) also can be because of receiving inverter failure (X), and overcurrent (Y) or cut off the water supply information such as (Z) and send protection instruction (G) indicates failure cause and position simultaneously.This protection instruction (G) is sent blocking instruction (T) by starter controller (2) to amplifier (4), and inversion system is quit work.
Claims (2)
1, a kind of reliable all-transistor formula of efficient energy-saving safe induction heating high intensity light source that adopts the ac-dc-ac transform mode is characterized in that this supply unit has:
One by field control power electronic device (a plurality of single-phase bridge type inverters (6) that constitute in parallel of every arm of 6A～6D), this inverter links to each other with the series resonant circuit of being made up of heater coil (8) and resonant capacitor (9);
Take from feedback sample voltage divider (10) frequency signal (f for one
1) frequency plot controller (11), its signal (fw) after with suitable phase shift is presented to separate excitation self-excitation transducer (3), amplify through amplifier (4), (5A～5D) changes according to the load circuit natural frequency and controls single-phase bridge type inverter (6) and do orderly switch work to give driver again;
Both accepted from frequency plot controller (11) and through frequency detector (12) and setpoint frequency (f for one
Hf
L) signal after comparing, accept the protection and the display (13) of inverter failure (X), overcurrent (Y) and (Z) information of cutting off the water supply again, it presents aforesaid protection command signal to starter controller (2), exceed setting range (2) and send blocking instruction (T) and present when detecting operating frequency to amplifier (4), this starter controller is connected to heating instruction (Q) in addition and converts this order to initiating signal (H) and presents to separate excitation self-excitation transducer (3), makes its system works;
This supply unit also is provided with a high frequency transformer (7) that is connected between single-phase bridge type inverter (6) and the load resonant circuit, and a local oscillator (1) produces signal (f
0) deliver to separate excitation self-excitation transducer (3), make its system's starting work.
2, all-transistor formula induction heating high intensity light source according to claim 1, it is characterized in that described high frequency transformer (7) adopts ferrite core to make, its primary and secondary coil has tap, change its primary and secondary turn ratio whereby and adjust the load impedance coupling, and but the high frequency transformer of mat respective numbers is coupled in same load resonant loop with a plurality of bridge-type inverters and makes power output stack synthetic, to obtain the output of super high power high frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94225167 CN2182505Y (en) | 1994-01-24 | 1994-01-24 | Whole-transistor type high frequency electric source apparatus for induction heating use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94225167 CN2182505Y (en) | 1994-01-24 | 1994-01-24 | Whole-transistor type high frequency electric source apparatus for induction heating use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2182505Y true CN2182505Y (en) | 1994-11-09 |
Family
ID=33838420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94225167 Expired - Fee Related CN2182505Y (en) | 1994-01-24 | 1994-01-24 | Whole-transistor type high frequency electric source apparatus for induction heating use |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2182505Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100379138C (en) * | 2003-12-19 | 2008-04-02 | 艾默生网络能源有限公司 | Control method and device for series resonant converter |
| CN101925209A (en) * | 2010-07-22 | 2010-12-22 | 深圳和而泰智能控制股份有限公司 | Hardware constant power control circuit and electromagnetic induction heating device |
| CN101478142B (en) * | 2008-12-16 | 2011-08-10 | 佛山市顺德区美的电热电器制造有限公司 | Power switch tube protecting circuit in semi-bridge induction heating circuit |
| CN109922589A (en) * | 2017-12-13 | 2019-06-21 | 通用电气公司 | For providing the system and method for electrical power to load |
-
1994
- 1994-01-24 CN CN 94225167 patent/CN2182505Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100379138C (en) * | 2003-12-19 | 2008-04-02 | 艾默生网络能源有限公司 | Control method and device for series resonant converter |
| CN101478142B (en) * | 2008-12-16 | 2011-08-10 | 佛山市顺德区美的电热电器制造有限公司 | Power switch tube protecting circuit in semi-bridge induction heating circuit |
| CN101925209A (en) * | 2010-07-22 | 2010-12-22 | 深圳和而泰智能控制股份有限公司 | Hardware constant power control circuit and electromagnetic induction heating device |
| CN101925209B (en) * | 2010-07-22 | 2012-11-21 | 深圳和而泰智能控制股份有限公司 | Hardware constant power control circuit and electromagnetic induction heating device |
| CN109922589A (en) * | 2017-12-13 | 2019-06-21 | 通用电气公司 | For providing the system and method for electrical power to load |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |