CN204902583U - Fixed cycle zero passage triggers electric heating system - Google Patents
Fixed cycle zero passage triggers electric heating system Download PDFInfo
- Publication number
- CN204902583U CN204902583U CN201520535695.3U CN201520535695U CN204902583U CN 204902583 U CN204902583 U CN 204902583U CN 201520535695 U CN201520535695 U CN 201520535695U CN 204902583 U CN204902583 U CN 204902583U
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- China
- Prior art keywords
- fixed cycle
- heater
- cycle zero
- zero cross
- auxiliary reclay
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Abstract
The utility model discloses a fixed cycle zero passage triggers electric heating system, including first circuit breaker and second circuit breaker, first circuit breaker and second circuit breaker are connected in the low voltage network of same three -way four -wire system, the ac contactor who has protect function is connected to first circuit breaker, ac contactor connects the fixed cycle zero passage and triggers the the power adjustment ware, the second circuit breaker is connected with interior atmosphere temperature regulation appearance of stove and the super temperature temperature regulation appearance of heater respectively, atmosphere temperature regulation appearance and the super temperature temperature regulation appearance of heater are connected with an auxiliary relay and the 2nd auxiliary relay respectively in the stove. The utility model discloses when thyristor during by the reverse breakdown, two auxiliary relay turn -off with control ac contactor, prevent the stove in the excess temperature burn out material and heater, be favorable to heater and heating object protection, the utility model discloses practiced thrift the electric energy, temperature control accuracy and heat -generating body are longe -lived simultaneously.
Description
Technical field
The utility model relates to industrial electro heating system field, specifically a kind of fixed cycle zero cross fired electric heating system.
Background technology
For in current industrial electro heating system, in order to accurately control the temperature of heating object, the following several method of main employing.
1. A.C. contactor or solid-state relay ON-OFF control, namely controlled by the break-make of A.C. contactor or solid-state relay, when heating object temperature is low, A.C. contactor or solid-state relay energising ON, when heating object temperature overtemperature, A.C. contactor or solid-state relay power-off OFF.The shortcoming of this kind of control method is; Heating object temperature is difficult to accomplish controllable precise, and heater is by the reciprocating impact of voltage, life-span corresponding shortening.
2. the direct temperature control of IGCT, serviceability temperature controller detects the temperature of heating object, and is that the signal of 4-20MA flows to IGCT by the results conversion after computing, is carried out the size adjustment of power output by the aperture adjusting IGCT.The method can accomplish to act freely, temperature control accurately and the heater life-span long, but the IGCT that general producer is selected all adopts the mode of phase-shifting trigger, and the advantage of phase-shifting trigger is that temperature controls very accurately, can accomplish ± 1 DEG C in.Its shortcoming is; Because phase-shifting trigger is exactly change the IGCT starting point of its conducting and the size of trigger delay angle α weekly, reach the object changing output voltage, power, so its major defect is the unfilled corner sine wave making to occur in circuit comprising higher hamonic wave, breach " burr " is there will be in the change of current moment, cause mains voltage waveform to distort and high-frequency electromagnetic wave excitation interference, when large trigger delay angle runs, power factor is lower, pollute electrical network, other electronic equipments of severe jamming and waste a large amount of electric energy.
3. based on above defect, part producing manufacturer adopts the IGCT of Super-zero control mode, this method uses general pure resistance heater all without any defect, but for the load of low-voltage and high-current, due to usually transformer can be installed between IGCT and heater, and the principle of zero cross fired is in setting-up time interval, the cycle changing turn on thyristors realizes the control of voltage or power, therefore its shortcoming there will be low-frequency disturbance when make-to-break ratio is too little exactly, illumination flicker is there will be when net capacity is large not, the phenomenons such as meter pointer shake, usually the electrothermal load that thermal inertia is larger is only applicable to, therefore general zero cross fired is not suitable for transformer load.
The patent No. is CN201420369886.2 in addition, patent name is a kind of aluminium holding furnace disclosing the single-phase IGCT heating of ON/OFF control of a kind of PID for " the aluminium holding furnace of the ON/OFF control single-phase IGCT heating of a kind of PID " discloses, and comprises heater, three phase mains, Zapping circuit, temperature Control PID table, exports combination setting apparatus, single-phase IGCT Circuit tuning and measuring circuit; Described three phase mains is electrically connected with the input of Zapping circuit; The power input of described single-phase IGCT Circuit tuning is connected electrically on the output of Zapping circuit; The output of described temperature Control PID table is electrically connected with single-phase IGCT Circuit tuning by the second relay; Described heater is electrically connected with single-phase IGCT Circuit tuning by measuring circuit.But change patented technology and do not adopt fixed cycle zero trigger mode, therefore power factor is lower, pollute electrical network, other electronic equipments of severe jamming and waste a large amount of electric energy.
Based on the defect that above various technology exists, have a kind of higher hamonic wave pollution eliminating phase-shifting trigger form and bring to be developed, make power factor of electric network high and save electric energy, simultaneous temperature controls accurate and that the heater life-span is long control electric heating system.
Utility model content
The purpose of this utility model is the defect overcoming above-mentioned prior art, provide a kind of higher hamonic wave pollution eliminating phase-shifting trigger form and bring, make power factor of electric network high and save electric energy, simultaneous temperature controls accurately and the fixed cycle zero cross fired electric heating system of heater life-span length.
Concrete technical scheme of the present utility model is achieved in that a kind of fixed cycle zero cross fired electric heating system, comprises the first breaker and the second breaker, and described first breaker and the second breaker are connected in the low-voltage network of same three line four-wire systems; Described first breaker connects the A.C. contactor with defencive function, and described A.C. contactor connects fixed cycle zero cross fired power regulator; Described second breaker is connected to ambient temperature adjusting apparatus and heater overtemperature humidostat in stove, and in described stove, ambient temperature adjusting apparatus and heater overtemperature humidostat are connected to the first auxiliary reclay and the second auxiliary reclay; Described first auxiliary reclay and the second auxiliary reclay, for controlling the opening and closing of described A.C. contactor, prevent excess temperature in stove from burning out material and heater.
Further, also comprise the auxiliary reclay trigger point of two series connection, one end, auxiliary reclay trigger point of two series connection is connected with described AC relay, and the other end is connected with described fixed cycle zero cross fired power regulator.
Further, also 4-20MA signal and hand-controlled regulator connect described fixed cycle zero cross fired power regulator respectively.
Particularly, described fixed cycle zero cross fired power regulator has been linked in sequence heater ammeter, heater voltmeter and transformer.
Further, described first auxiliary reclay and the second auxiliary reclay are also connected respectively at described second breaker.
Compared with prior art, the utility model breaker be connected with for the protection of A.C. contactor, be connected with two auxiliary reclays simultaneously, when IGCT be reversed puncture always High-current output and and cause in-furnace temperature excess temperature time, described first auxiliary reclay, the second auxiliary reclay and control A.C. contactor turn off, prevent excess temperature in stove from burning out material and heater, be conducive to protecting heater and heating object;
Be provided with fixed cycle zero cross fired power regulator, described fixed cycle zero cross fired power regulator adopts fixed cycle zero trigger mode, eliminate the higher hamonic wave pollution that phase-shifting trigger form is brought, make power factor of electric network high and save electric energy, simultaneous temperature controls accurate and the heater life-span is long.
Accompanying drawing explanation
Fig. 1 is the overall theory structure block diagram of a kind of fixed cycle of the utility model zero cross fired electric heating system.
Detailed description of the invention
Below in conjunction with accompanying drawing, concrete case study on implementation of the present utility model is illustrated:
As shown in Figure 1, a kind of fixed cycle zero cross fired electric heating system, comprises the first breaker 1 and the second breaker 15, and described first breaker 1 and the second breaker 15 are connected in the low-voltage network 3 of same three line four-wire systems; Described first breaker 1 connects the A.C. contactor 2 with defencive function, and described A.C. contactor 2 connects fixed cycle zero cross fired power regulator 5; Described second breaker 15 is connected to ambient temperature adjusting apparatus 11 and heater overtemperature humidostat 13 in stove, and in described stove, ambient temperature adjusting apparatus 11 and heater overtemperature humidostat 13 are connected to the first auxiliary reclay 12 and the second auxiliary reclay 14; When IGCT be reversed puncture always High-current output and cause in-furnace temperature excess temperature time, described first auxiliary reclay 12 and the second auxiliary reclay 14, for controlling the opening and closing of described A.C. contactor 2, prevent excess temperature in stove from burning out material and heater.
The utility model also comprises the auxiliary reclay trigger point (6,7) of two series connection, and auxiliary reclay trigger point (6,7) one end of two series connection is connected with described AC relay 2, and the other end is connected with described fixed cycle zero cross fired power regulator 5.Also 4-20MA signal 3 and hand-controlled regulator 4 connect described fixed cycle zero cross fired power regulator 5 respectively.Described fixed cycle zero cross fired power regulator 5 has been linked in sequence heater ammeter 8, heater voltmeter 9 and transformer 10.Described first auxiliary reclay 12 and the second auxiliary reclay 14 are also connected respectively at described second breaker 15.
In described stove ambient temperature adjusting apparatus 11 for measure heating object temperature and by exporting suitable 4-20MA signal 3 after PID arithmetic to described fixed cycle zero cross fired power regulator 5, power output for heater adjusts, and makes in-furnace temperature reach the temperature of setting.
Described hand-controlled regulator 4 for limiting the output power range of described fixed cycle zero cross fired power regulator 5, for relatively moistening in initial stove and the class of insulation is low time drying work.
Described heater overtemperature humidostat 13 is for the temperature of HEATER FOR MEASURING; when heter temperature is higher than setting value; described second auxiliary reclay 14 controls described auxiliary reclay contact (6; 7) disconnect; described fixed cycle zero cross fired power regulator 5 is quit work, burns out for the protection of heater excess temperature.
Described fixed cycle zero cross fired power regulator 5 exports the voltage of 380V to described transformer 10, and suitable low-voltage and high-current is flowed to heater and is used for heating by described transformer 10 after transformation.
Particularly, described fixed cycle zero cross fired power regulator 5 adopts fixed cycle zero trigger mode, eliminates the higher hamonic wave pollution that phase-shifting trigger form is brought, makes power factor of electric network high and save electric energy, and simultaneous temperature controls accurate and the heater life-span is long.
Limit the scope that the utility model is implemented, the simple equivalence change namely generally done according to the utility model claim and utility model description with modify, all still belong in scope that the utility model patent contains.
Claims (5)
1. a fixed cycle zero cross fired electric heating system, is characterized in that, comprises the first breaker and the second breaker, and described first breaker and the second breaker are connected in the low-voltage network of same three line four-wire systems; Described first breaker connects the A.C. contactor with defencive function, and described A.C. contactor connects fixed cycle zero cross fired power regulator; Described second breaker is connected to ambient temperature adjusting apparatus and heater overtemperature humidostat in stove, and in described stove, ambient temperature adjusting apparatus and heater overtemperature humidostat are connected to the first auxiliary reclay and the second auxiliary reclay; Described first auxiliary reclay and the second auxiliary reclay, for controlling the opening and closing of described A.C. contactor, prevent excess temperature in stove from burning out material and heater.
2. a kind of fixed cycle zero cross fired electric heating system as claimed in claim 1, it is characterized in that, also comprise the auxiliary reclay trigger point of two series connection, one end, auxiliary reclay trigger point of two series connection is connected with described AC relay, and the other end is connected with described fixed cycle zero cross fired power regulator.
3. a kind of fixed cycle zero cross fired electric heating system as claimed in claim 2, is characterized in that, also 4-20MA signal and hand-controlled regulator connect described fixed cycle zero cross fired power regulator respectively.
4. a kind of fixed cycle zero cross fired electric heating system as claimed in claim 3, is characterized in that, described fixed cycle zero cross fired power regulator has been linked in sequence heater ammeter, heater voltmeter and transformer.
5. a kind of fixed cycle zero cross fired electric heating system as claimed in claim 1, it is characterized in that, described first auxiliary reclay and the second auxiliary reclay are also connected respectively at described second breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520535695.3U CN204902583U (en) | 2015-07-23 | 2015-07-23 | Fixed cycle zero passage triggers electric heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520535695.3U CN204902583U (en) | 2015-07-23 | 2015-07-23 | Fixed cycle zero passage triggers electric heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204902583U true CN204902583U (en) | 2015-12-23 |
Family
ID=54924751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520535695.3U Expired - Fee Related CN204902583U (en) | 2015-07-23 | 2015-07-23 | Fixed cycle zero passage triggers electric heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204902583U (en) |
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2015
- 2015-07-23 CN CN201520535695.3U patent/CN204902583U/en not_active Expired - Fee Related
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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: 20151223 Termination date: 20190723 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |