CN201774497U - Electrical control system for boiler induced-draft fan - Google Patents
Electrical control system for boiler induced-draft fan Download PDFInfo
- Publication number
- CN201774497U CN201774497U CN2010202946049U CN201020294604U CN201774497U CN 201774497 U CN201774497 U CN 201774497U CN 2010202946049 U CN2010202946049 U CN 2010202946049U CN 201020294604 U CN201020294604 U CN 201020294604U CN 201774497 U CN201774497 U CN 201774497U
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- CN
- China
- Prior art keywords
- draft fan
- frequency converter
- induced
- control system
- electrical 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
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Abstract
The utility model discloses an electrical control system for a boiler induced-draft fan. The electrical control system comprises a three-phase connecting wire led out from L1, L2 and L3 terminals of a three-phase terminal, a first group of connecting wires are led out from the three-phase connecting wire and respectively connected with input terminals R, S and T of a frequency converter vvvf after being connected in series with a circuit breaker QF1, connecting wires are led out of output terminals U, V and W of the frequency converter vvvf and connected with a power supply input terminal of an induced-draft fan M after being connect in series with an AC contactor, the connecting wire led out of the output terminal W of the frequency converter vvvf is connected in series with a current transformer TA1, and a second group of connecting wires are led out of the three-phase connecting wire and connected with the power supply input terminal of the induced-draft fan M after being sequentially connected in series with a circuit breaker QF2, an AC contactor KM2 and a thermorelay FR1. In the utility model, the frequency converter is arranged in the electrical control loop of the induced-draft fan to vary the working voltage and variable frequency of the motor of the frequency converter, so as to further change magnetic cycle of the motor movement and achieve the purpose of smoothly control the rotational speed of the motor. Therefore, the electrical control system for the boiler induced-draft fan has quite good utility value.
Description
Technical field
The utility model relates to a kind of boiler induced-draft fan electric control system.
Background technology
Induced draft fan is the mechanical energy that relies on input, improves supply gas the side by side machinery of body of gas pressure, and it is a kind of driven fluid machinery.Induced draft fan is widely used in ventilation, dust discharge and the cooling of factory, mine, tunnel, cooling tower, vehicle, boats and ships and building; The ventilation of boiler and industrial furnace and air inducing; Cooling in the apparatus of air conditioning and the domestic electric appliance and ventilation; The oven dry of cereal and selecting and recommending; The inflation of wind-tunnel wind regime and aircushion vehicle and propelling etc.
The operation principle and the turbocompressor of induced draft fan are basic identical, and just because gas flow rate is lower, pressure changes little, generally do not need to consider the variation of gas specific volume, promptly gas are handled as incompressible fluid.
The utility model content
The purpose of this utility model provides a kind of boiler induced-draft fan electric control system, in the induced draft fan electric control loop frequency converter is set, and changes the operating voltage and the frequency conversion rate of id-motor.
The technical solution of the utility model is as follows:
A kind of boiler induced-draft fan electric control system, include three phase connections of drawing from three-phase terminal end L1, L2, L3, it is characterized in that: draw first set of connections from described three phase connections, insert input R, S, the T end of frequency converter vvvf behind the series connection circuit breaker Q F1 respectively, draw wiring from output U, V, the W end of frequency converter vvvf, insert the power input of induced draft fan M behind the serial connection A.C. contactor KM1, wherein the wiring of drawing from the output W end of frequency converter vvvf is serially connected with current transformer TA1;
Draw second set of connections from described three phase connections, insert the power input of induced draft fan M behind the circuit breaker Q of connecting successively F2, A.C. contactor KM2 and the thermal relay FR1.
The beneficial effects of the utility model:
The utility model is by being provided with frequency converter in the induced draft fan electric control loop, come the operating voltage and the frequency conversion rate of real time altering id-motor, thereby change the cycle of id-motor moving magnetic field, reach the purpose of level and smooth control id-motor rotating speed, have good practical value.
Description of drawings
Fig. 1 is an electrical schematic diagram of the present utility model.
Embodiment
Referring to Fig. 1, a kind of boiler induced-draft fan electric control system, include three phase connections of drawing from three-phase terminal end L1, L2, L3, draw first set of connections from three phase connections, insert input R, S, the T end of frequency converter vvvf behind the series connection circuit breaker Q F1 respectively, draw wiring from output U, V, the W end of frequency converter vvvf, insert the power input of induced draft fan M behind the serial connection A.C. contactor KM1, wherein the wiring of drawing from the output W end of frequency converter vvvf is serially connected with current transformer TA1;
Draw second set of connections from three phase connections, insert the power input of induced draft fan M behind the circuit breaker Q of connecting successively F2, A.C. contactor KM2 and the thermal relay FR1.
Claims (1)
1. boiler induced-draft fan electric control system, include three phase connections of drawing from three-phase terminal end L1, L2, L3, it is characterized in that: draw first set of connections from described three phase connections, insert input R, S, the T end of frequency converter vvvf behind the series connection circuit breaker Q F1 respectively, draw wiring from output U, V, the W end of frequency converter vvvf, insert the power input of induced draft fan M behind the serial connection A.C. contactor KM1, wherein the wiring of drawing from the output W end of frequency converter vvvf is serially connected with current transformer TA1;
Draw second set of connections from described three phase connections, insert the power input of induced draft fan M behind the circuit breaker Q of connecting successively F2, A.C. contactor KM2 and the thermal relay FR1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202946049U CN201774497U (en) | 2010-08-11 | 2010-08-11 | Electrical control system for boiler induced-draft fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202946049U CN201774497U (en) | 2010-08-11 | 2010-08-11 | Electrical control system for boiler induced-draft fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201774497U true CN201774497U (en) | 2011-03-23 |
Family
ID=43754335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202946049U Expired - Fee Related CN201774497U (en) | 2010-08-11 | 2010-08-11 | Electrical control system for boiler induced-draft fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201774497U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355194A (en) * | 2011-09-20 | 2012-02-15 | 天津市天锻压力机有限公司 | Power-saving setting circuit for frequency converters of hydraulic presses |
| CN102954012A (en) * | 2011-08-23 | 2013-03-06 | 苏州常乐泡塑有限公司 | Frequency conversion control circuit of forced and induced draft fan |
-
2010
- 2010-08-11 CN CN2010202946049U patent/CN201774497U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954012A (en) * | 2011-08-23 | 2013-03-06 | 苏州常乐泡塑有限公司 | Frequency conversion control circuit of forced and induced draft fan |
| CN102355194A (en) * | 2011-09-20 | 2012-02-15 | 天津市天锻压力机有限公司 | Power-saving setting circuit for frequency converters of hydraulic presses |
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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: 20110323 Termination date: 20140811 |
|
| EXPY | Termination of patent right or utility model |