CN202362684U - Low-voltage electric heating control device - Google Patents
Low-voltage electric heating control device Download PDFInfo
- Publication number
- CN202362684U CN202362684U CN2011204450042U CN201120445004U CN202362684U CN 202362684 U CN202362684 U CN 202362684U CN 2011204450042 U CN2011204450042 U CN 2011204450042U CN 201120445004 U CN201120445004 U CN 201120445004U CN 202362684 U CN202362684 U CN 202362684U
- Authority
- CN
- China
- Prior art keywords
- state relay
- temperature controller
- phase zero
- solid
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Resistance Heating (AREA)
Abstract
The utility model discloses a low-voltage electric heating control device, which comprises an electric heater, an alternating-current contactor, a three-phase zero-crossing trigger solid-state relay and a stepping temperature controller, wherein the electric heater, the three-phase zero-crossing trigger solid-state relay and the alternating-current contactor are sequentially connected in series, and the three-phase zero-crossing trigger solid-state relay is connected with the stepping temperature controller. By using the stepping temperature controller, the smooth regulation of the power of the heater is realized and the temperature is accurately regulated. Besides, since equipment used by the device are mature products in the market, the cost is lower, the device can be widely popularized and used, the equipment do not cause harmonic pollution and a better temperature regulating effect can be reached.
Description
Technical field
The utility model relates to the low-voltage electrical heating control apparatus in places such as being applicable to each industrial and mineral, oil, chemical industry.
Background technology
Present electric heating control apparatus mainly contains following two kinds:
A, old-fashioned temperature controller are directly controlled A.C. contactor and are driven well heater;
B, new-type temperature controller come the controlling and driving well heater through solid-state relay;
C, require control accuracy highland occasion, adopt temperature controller, the output analog quantity drives phase shift and triggers controller, and then the control three-phase controllable silicon, drives well heater;
More than three kinds of control modes all have certain shortcoming:
The control mode of a, b class all is when not reaching design temperature, contactor or solid-state relay work, and well heater gets the electrical heating operation, and contactor or solid-state relay quit work when reaching design temperature, and the heating of well heater dead electricity stops.These two kinds cheap and easy to maintenance, but the average voltage that outputs on the well heater can not smooth adjustment, or export to well heater 100% voltage; With regard to 0 voltage; Also just cannot quantitatively regulate heating power, therefore to temperature control out of true, control accuracy is about ± 5 ℃;
The working method of c class is when not reaching design temperature, and temperature controller output analog quantity drives phase shift and triggers controller; The control bidirectional triode thyristor; Through the size of conduction angle of control AC power, regulate the average voltage of working on the well heater, also just accurately controlled heating power.This control mode has realized the accurate control to heating-up temperature, and control accuracy is about ± 1 ℃.But this kind control device; Cost an arm and a leg, safeguard complicacy; And, can produce a large amount of harmonic pollutions to electric power system owing to adopt the power supply phase shift to trigger controller, cause misoperation easily with protection electrical equipment in the electrical network; With serious pollutionly damage other electrical equipment in the electrical network, by power supply department is limited use.
The utility model content
To above defective, the utility model provides a kind of low-voltage electrical heating control apparatus, solve the existing low-voltage electrical heating control apparatus cost that can accurately regulate temperature higher with the problem that produces harmonic pollution.
For realizing above-mentioned purpose, the utility model is realized through following technical scheme:
Low-voltage three phase asynchronous motor control system frequency converting and energy saving device; Comprise electric heater, A.C. contactor, three-phase zero cross fired solid-state relay and position formula temperature controller; Said electric heater, three-phase zero cross fired solid-state relay and A.C. contactor are connected in series successively, and said three-phase zero cross fired solid-state relay is connected with position formula temperature controller.
The utility model is given special-purpose position formula temperature controller through the collection in worksite signal; Drive zero cross fired high power solid state relay; Export single sine voltage; Thereby control the output average voltage through the number of controlling single sine wave, realized the power of well heater is carried out smooth adjustment, thereby temperature is accurately regulated.The PID computing is adopted in the internal control of this formula temperature controller; Carry-out bit formula impulse level signal; The average voltage that outputs on the well heater can 0～100% smooth adjustment; Also just can carry out smooth adjustment, thereby temperature control precision is higher, can reach ± about 1.5～2 ℃ to the power of well heater of control.And the utility model do not have image drift to trigger the such complicated nonshared control unit of controller mutually, all adopts matured product on the market, cooperates specific control program temperature controller, can reach this control function, and cost is lower, is suitable for applying.Institute's employing equipment can not produce harmonic pollution simultaneously, can reach adjustment effect preferably.
Description of drawings
According to embodiment and accompanying drawing the utility model is done further explain below.
Fig. 1 is the electric heating control apparatus electric diagram through solid-state relay control;
Fig. 2 is the electric heating control apparatus electric diagram that triggers control through the controllable silicon phase shift;
Fig. 3 is the described low-voltage electrical heating control apparatus of a utility model electric diagram.
Among the figure:
1, electric heater; 2, three-phase zero cross fired solid-state relay; 3, A.C. contactor; 4, position formula temperature controller; 5, the three-phase phase shift triggers controller; 6, temperature controller; 7, bidirectional triode thyristor; 8, solid-state relay.
Embodiment
As shown in Figure 3; Provided the electric diagram of a specific embodiment of the said low-voltage electrical heating control apparatus of the utility model; A kind of low-voltage electrical heating control apparatus; Comprise electric heater 1, A.C. contactor 3, three-phase zero cross fired solid-state relay 2 and position formula temperature controller 4, said electric heater 1, three-phase zero cross fired solid-state relay 2 and A.C. contactor 3 are connected in series successively, and said three-phase zero cross fired solid-state relay 2 is connected with a formula temperature controller 4.
As shown in Figure 1, through the electric heating control apparatus of solid-state relay 8 controls,, give electric heater 1 power supply heating thereby control switching on and off of solid-state relay 8, or stop power supply and do not heat through the control contact of temperature controller 6.
As shown in Figure 2; Trigger the electric heating control apparatus of control through the controllable silicon phase shift; Trigger controller 5 for the three-phase phase shift through temperature controller 6 output analog signalses; Export three groups of trigger pips then and give three bidirectional triode thyristors 7, through regulating the size of the sinusoidal wave conduction angle of AC power, the final average voltage of exporting to electric heater 1 of regulating.
As shown in Figure 3, the 4 adjustable impulse level crowds of output give three-phase zero cross fired solid-state relay 2 through position formula temperature controller, thereby control switching on and off of three-phase zero cross fired solid-state relay 2.For example when the device actual temperature that needs heating during far below design temperature, need high-power heating, 100 impulse level crowds of output in unit interval this moment make 100 single sine voltages of output (conventional computational load power adopts average voltage to calculate); Device warp heating after a while when the needs heating; Actual temperature is during near design temperature; Need the miniwatt heating; Be adjusted to 10 impulse level crowds of output in unit interval this moment, make and export 10 single sine voltages, (conventional computational load power adopts average voltage to calculate) this kind regulative mode is stepless adjustable.This shows that under two kinds of different operating states different pulse train controls obtain different sinusoidal wave quantity, also just obtain the average voltage of varying number level, thereby make electric heater 1 obtain different heating powers, the accurate control of final realization.
The utility model has been realized the power of well heater is carried out smooth adjustment through adopting position formula temperature controller, thereby temperature is accurately regulated.And the equipment that this device adopts is the matured product on the market, and cost is lower, is suitable for applying, and this equipment can not produce harmonic pollution simultaneously, can reach adjustment effect preferably.
Claims (1)
1. low-voltage electrical heating control apparatus; Comprise electric heater and A.C. contactor; It is characterized in that: also comprise three-phase zero cross fired solid-state relay and position formula temperature controller; Said electric heater, three-phase zero cross fired solid-state relay and A.C. contactor are connected in series successively, and said three-phase zero cross fired solid-state relay is connected with position formula temperature controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204450042U CN202362684U (en) | 2011-11-11 | 2011-11-11 | Low-voltage electric heating control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204450042U CN202362684U (en) | 2011-11-11 | 2011-11-11 | Low-voltage electric heating control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202362684U true CN202362684U (en) | 2012-08-01 |
Family
ID=46573856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204450042U Expired - Fee Related CN202362684U (en) | 2011-11-11 | 2011-11-11 | Low-voltage electric heating control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202362684U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981532A (en) * | 2012-11-26 | 2013-03-20 | 中国科学院电工研究所 | Electric heating control circuit for air resistance furnace |
| CN114115386A (en) * | 2021-11-24 | 2022-03-01 | 湖南凯美特气体股份有限公司 | Electric heater control method, system and device |
-
2011
- 2011-11-11 CN CN2011204450042U patent/CN202362684U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981532A (en) * | 2012-11-26 | 2013-03-20 | 中国科学院电工研究所 | Electric heating control circuit for air resistance furnace |
| CN102981532B (en) * | 2012-11-26 | 2014-11-26 | 中国科学院电工研究所 | Electric heating control circuit for air resistance furnace |
| CN114115386A (en) * | 2021-11-24 | 2022-03-01 | 湖南凯美特气体股份有限公司 | Electric heater control method, system and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105486101B (en) | A kind of controllable inversion high temperature furnace | |
| CN204858588U (en) | Grid -connected PV power generation system based on improved generation fuzzy control | |
| CN202362684U (en) | Low-voltage electric heating control device | |
| CN107017812A (en) | The device and control method of a kind of self-excitation asynchronous generator | |
| CN104698395A (en) | Twin-dragging function testing system and method for MMC low-voltage moving die sub-module | |
| CN105183058A (en) | Multifunctional alternating-current stabilized-voltage power control system | |
| CN201757565U (en) | Oven device | |
| CN103280997B (en) | The rectification circuit of power adjustable | |
| CN102361341B (en) | Contravariant pulsed program controlled charging equipment | |
| CN205537168U (en) | Controllable contravariant high temperature furnace | |
| CN204407972U (en) | A kind of novel online uninterrupted variable frequency power supply | |
| CN107707104A (en) | Three phase converter and its control method without filter capacitor | |
| CN202127522U (en) | Intermediate frequency power supply closed-loop control system for machining of high-speed railway fastener elastic strip | |
| CN203480347U (en) | Electric control device of magnetic stirrer | |
| CN202206177U (en) | Inverse pulsation program control type charging equipment | |
| CN203788158U (en) | Low frequency heating device of transformer | |
| CN204408200U (en) | Three phase voltage adjusting device | |
| CN206313696U (en) | A kind of general motor control device based on double-closed-loop control | |
| CN104124911B (en) | A kind of electric power supply control system and Stirling motor | |
| CN204406234U (en) | A kind of electrically heating and temperature control equipment | |
| CN204143219U (en) | A kind of electrically heating control apparatus | |
| CN202084910U (en) | High-voltage frequency conversion device capable of overheating protection | |
| CN207743697U (en) | Test device applied to active power compensator | |
| CN203590114U (en) | Single-phase alternating current voltage-regulating and speed-changing blower fan | |
| CN202998535U (en) | An intermediate-frequency induction heating power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20121111 |