CN201957276U - Control circuit of electromagnetic heating cylinder - Google Patents
Control circuit of electromagnetic heating cylinder Download PDFInfo
- Publication number
- CN201957276U CN201957276U CN2011200158089U CN201120015808U CN201957276U CN 201957276 U CN201957276 U CN 201957276U CN 2011200158089 U CN2011200158089 U CN 2011200158089U CN 201120015808 U CN201120015808 U CN 201120015808U CN 201957276 U CN201957276 U CN 201957276U
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- cartridge heater
- control circuit
- push
- unit
- type high
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- General Induction Heating (AREA)
Abstract
The utility model relates to the field of electronic circuits, in particular to a control circuit of an electromagnetic heating cylinder, which is structurally characterized in that an electric supply input end is connected in series with a filter capacitor, then connected to a rectifier bridge unit and an LC (Launch Control) filter unit, and then connected in series with a dual-push-pull type high-frequency oscillating unit, the dual-push-pull type high-frequency oscillating unit is realized in a manner that two PWM (Pulse Width Modulation) output ports of a control chip are respectively connected with a drive tube to control two power switch tubes in the dual-push-pull type high-frequency oscillating unit, the output end of an electromagnetic coil is used for collecting sampling signals to a sampling signal input end of the control chip through a current transformer, and a thermoelectric couple is arranged on the electromagnetic heating cylinder which is connected to the temperature collecting signal input end of the control chip through serially connecting a temperature controller. The utility model can ensure that a control function of the control circuit is stable for a long time and is more suitable for being used by the electromagnetic heating cylinder.
Description
Technical field
The utility model relates to electronic circuit field, relates in particular to the control circuit of electromagnetism heating.
Background technology
At plastic industry, need heater in the plastics automated production process equipments such as injection molding machine, grit maker, bench, inflation film manufacturing machine, plastic regenerator plastics are carried out the heat fused processing.There is the heating wire of employing direct-fired, the employing electromagnetism cartridge heater that perhaps has.
Adopting the direct-fired advantage of heating wire is that control mode is simply direct, only needs the switching that can finish heating and not heat by the control on/off, but its shortcoming slow and big energy-consuming that is firing rate.Therefore, gradually by another kind of mode of heating, promptly the electromagnetism cartridge heater replaces.It carries out indirect by the electromagnetic induction heating mode to cartridge heater, and mode of heating is more energy-conservation and quick, but the control circuit of this electromagnetism cartridge heater is complicated relatively more.
The control circuit of existing electromagnetism cartridge heater directly by the adhesive or the disconnection of control contactor, is controlled on/off.The weak point of this mode is: 1. the long-time stability of contactor are not good.2. the impact to power supply is big, can have influence on control main board.
The utility model content
Therefore,, the utility model proposes a kind of control circuit of improved electromagnetism cartridge heater at above-mentioned deficiency, can be so that the controlled function long-term stability of control circuit be fit to the electromagnetism cartridge heater more and uses.
The technical solution of the utility model is:
The control circuit of electromagnetism cartridge heater, specifically: insert a rectifier bridge unit and a LC filter unit behind filter capacitor of mains electricity input end series connection, the double-push-pull type high frequency oscillation unit of connecting again, double-push-pull type high frequency oscillation unit wherein is that 2 PWM output ports by a control chip respectively connect driving tube respectively and control 2 power switch pipes in the double-push-pull type high frequency oscillation unit, the power switch pipe two ends of 2 series connection also and connect 2 groups of capacitance group by 2 capacitances in series, the intermediate ends of 2 groups of capacitance group is a coil output, insert 2 incoming ends of solenoid of electromagnetism cartridge heater respectively and the double-push-pull type high frequency oscillation unit that constitutes, one of them coil output is also gathered the sampled signal input of sampled signal to above-mentioned control chip by a current transformer, also be provided with a thermocouple on the described electromagnetism cartridge heater, and be connected to the temperature acquisition signal input part of this control chip by the thermostat input of connecting.
Further preferred, for the better protection power safety, prevent accident, thermal fuse of series connection on the live wire of described mains electricity input end, and anti-surge piezo-resistance in parallel between live wire and the zero line.
Further preferred, the full-wave bridge rectifier unit that described rectifier bridge unit is made up of 4 diodes carries out bridge full-wave rectifier to electric main.
Further preferred, the simple filter unit that the electric capacity that described LC filter unit is connected with two ends by an inductance is formed comes the high order harmonic component composition of filter out power.
Further preferred, described power switch pipe is an insulated gate bipolar transistor.
The utility model adopts as above technical scheme, can control the coil of electromagnetism cartridge heater by the double-push-pull type high frequency oscillation unit, can realize the control of the coil higher-order of oscillation more stable and more reliably.The utility model adopts insulated gate bipolar transistor (IGBT) to substitute contactor, can obtain work steady in a long-term.And can not produce impact greatly by power supply, can not have influence on the work of control chip yet.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Now with embodiment the utility model is further specified in conjunction with the accompanying drawings.
Consult shown in Figure 1, the control circuit of electromagnetism cartridge heater, specifically: insert a rectifier bridge cells D 1 and a LC filter unit, the double-push-pull type high frequency oscillation unit of connecting again behind filter capacitor C7 of mains electricity input end series connection.Preferably, for the better protection power safety, prevent accident, the live wire POW-L of described mains electricity input end goes up thermal fuse FUSE1 of series connection, and anti-surge piezo-resistance RV1 in parallel between live wire POW-L and the zero line POW-N.The full-wave bridge rectifier unit that described rectifier bridge cells D 1 is made up of 4 diodes carries out bridge full-wave rectifier to electric main.Described LC filter unit is made up of filter capacitor C1, the C2 that a filter inductance L1 is connected with two ends.
Wherein, the double-push-pull type high frequency oscillation unit is that 2 PWM output ports by a control chip IC1 respectively connect driving tube G1, G2 respectively and control 2 power switch pipe IGBT1, IGBT2 in the double-push-pull type high frequency oscillation unit.Preferably, described power switch pipe is insulated gate bipolar transistor (IGBT).The power switch pipe IGBT1 of 2 series connection, the IGBT2 two ends also and meet 2 groups of capacitance group C3 and C4 by 2 capacitances in series, C5 and C6, the intermediate ends of 2 groups of capacitance group is a coil output, insert 2 incoming ends of solenoid L2 of electromagnetism cartridge heater HT1 respectively and the double-push-pull type high frequency oscillation unit that constitutes, one of them coil output is also gathered the sampled signal input of sampled signal to above-mentioned control chip IC1 by a current transformer CT1, also be provided with a thermocouple WK1 on the described electromagnetism cartridge heater HT1, and be connected to the temperature acquisition signal input part of this control chip IC1 by the thermostat U1 input of connecting.
2 PWM output ports of control chip IC1 respectively connect driving tube G1, G2 respectively, alternately export the PWM square wave, control 2 power switch pipe IGBT1, IGBT2 in the double-push-pull type high frequency oscillation unit and take turns conducting, thereby realize that solenoid L2 and capacitor C 6 or solenoid L2 and the capacitor C 4 from capacitor C 5, electromagnetism cartridge heater HT1 on of electric current on capacitor C 3, the electromagnetism cartridge heater HT1 alternately flows through, realize dither heat electromagnetism cartridge heater HT1 the irony tube.Simultaneously, the sampled signal input of control chip IC1 is by obtaining the collection sampled signal of current transformer CT1 input, the temperature acquisition signal input part of control chip IC1 is by obtaining the temperature signal of thermostat U1 input, come analytical calculation, change the output waveform of 2 PWM output ports again, thereby realize the power control of electromagnetism cartridge heater HT1 or the control that stops and starting.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection range of the present utility model.
Claims (5)
1. the control circuit of an electromagnetism cartridge heater, it is characterized in that: a rectifier bridge unit (D1) and a LC filter unit are inserted in a mains electricity input end filter capacitor of series connection (C7) back, the double-push-pull type high frequency oscillation unit of connecting again, double-push-pull type high frequency oscillation unit wherein is that 2 PWM output ports by a control chip (IC1) respectively connect driving tube (G1 respectively, G2) control 2 power switch pipe (IGBT1 in the double-push-pull type high frequency oscillation unit, IGBT2), power switch pipe (the IGBT1 of 2 series connection, IGBT2) two ends also and meet 2 groups of capacitance group by 2 capacitances in series (C3 and C4, C5 and C6), the intermediate ends of 2 groups of capacitance group is a coil output, insert 2 incoming ends of solenoid (L2) of electromagnetism cartridge heater (HT1) respectively and the double-push-pull type high frequency oscillation unit that constitutes, one of them coil output is also gathered the sampled signal input of sampled signal to above-mentioned control chip (IC1) by a current transformer (CT1), also be provided with a thermocouple (WK1) on the described electromagnetism cartridge heater (HT1), and be connected to the temperature acquisition signal input part of this control chip (IC1) by a thermostat of series connection (U1) input.
2. the control circuit of electromagnetism cartridge heater according to claim 1, it is characterized in that: the live wire of described mains electricity input end (POW-L) is gone up a series connection thermal fuse (FUSE1), and an anti-surge piezo-resistance (RV1) in parallel between live wire (POW-L) and the zero line (POW-N).
3. the control circuit of electromagnetism cartridge heater according to claim 1 is characterized in that: the full-wave bridge rectifier unit that described rectifier bridge unit (D1) is made up of 4 diodes.
4. the control circuit of electromagnetism cartridge heater according to claim 1 is characterized in that: the electric capacity that described LC filter unit is connected with two ends by an inductance (L1) (C1, C2) is formed.
5. the control circuit of electromagnetism cartridge heater according to claim 1 is characterized in that: described power switch pipe is insulated gate bipolar transistor (IGBT).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200158089U CN201957276U (en) | 2011-01-15 | 2011-01-15 | Control circuit of electromagnetic heating cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200158089U CN201957276U (en) | 2011-01-15 | 2011-01-15 | Control circuit of electromagnetic heating cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201957276U true CN201957276U (en) | 2011-08-31 |
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ID=44501377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200158089U Expired - Fee Related CN201957276U (en) | 2011-01-15 | 2011-01-15 | Control circuit of electromagnetic heating cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201957276U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436283A (en) * | 2011-09-20 | 2012-05-02 | 美的集团有限公司 | Heating power control circuit and control method |
| CN102635754A (en) * | 2012-03-02 | 2012-08-15 | 赖永明 | Direct type high-frequency direct-current oscillation iron-contained pipeline heating device |
| CN102984832A (en) * | 2012-12-06 | 2013-03-20 | 中国科学院国家天文台 | High-precision constant-temperature barrel |
-
2011
- 2011-01-15 CN CN2011200158089U patent/CN201957276U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436283A (en) * | 2011-09-20 | 2012-05-02 | 美的集团有限公司 | Heating power control circuit and control method |
| CN102635754A (en) * | 2012-03-02 | 2012-08-15 | 赖永明 | Direct type high-frequency direct-current oscillation iron-contained pipeline heating device |
| CN102984832A (en) * | 2012-12-06 | 2013-03-20 | 中国科学院国家天文台 | High-precision constant-temperature barrel |
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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 |
Granted publication date: 20110831 Termination date: 20150115 |
|
| EXPY | Termination of patent right or utility model |