Electrostatic dust collector control circuit, PCB and controller thereof

Abstract

The utility model discloses an electrostatic dust collector control circuit, a PCB and a controller of the electrostatic dust collector control circuit, and the electrostatic dust collector control circuit comprises a rectification filtering unit, a switch unit, a first resonance unit, a second resonance unit, a first transformation unit, a second transformation unit, a first electric field unit and a second electric field unit, the output end of the rectification filtering unit is connected with the switch unit, the output end of the switch unit is connected with the first resonance unit and the second resonance unit, the output end of the first resonance unit is connected with the input end of the first voltage transformation unit, and the output end of the first voltage transformation unit is connected with the first electric field unit. The output end of the second resonance unit is connected with the input end of the second transformation unit, and the output end of the second transformation unit is connected with the second electric field unit; the independent two-path output is realized through the first voltage transformation unit and the second voltage transformation unit, and when the flashover problem or the short circuit problem of the second electric field unit occurs, the normal use of the first electric field unit is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic dust removal equipment, in particular to an electrostatic dust collector control circuit, a PCB board and a controller thereof. Background Art

[0002] Two dust removal electric fields are usually set up in the electrostatic precipitator to absorb dust in the air. The existing electrostatic precipitator usually adopts a single power supply method. If the second electric field has flash discharge or short circuit problems, the power supply of this line must be turned off. However, after the power supply of this electric field is turned off, the first electric field will also stop working at the same time, which greatly affects the dust removal efficiency and working stability of the electrostatic precipitator.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide an electrostatic precipitator control circuit, which independently controls two electric fields to improve the flexibility and stability of the electrostatic precipitator during use.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An electrostatic precipitator control circuit comprises a rectifier and filter unit, a switch unit, a first resonant unit, a second resonant unit, a first transformer unit, a second transformer unit, a first electric field unit and a second electric field unit, wherein the input end of the rectifier and filter unit is connected to a single-phase power supply, the output end of the rectifier and filter unit is connected to the switch unit, the output end of the switch unit is respectively connected to the first resonant unit and the second resonant unit, the output end of the first resonant unit is connected to the input end of the first transformer unit, the output end of the first transformer unit is connected to the first electric field unit, the output end of the second resonant unit is connected to the input end of the second transformer unit, and the output end of the second transformer unit is connected to the second electric field unit.

[0007] In the electrostatic precipitator control circuit, the rectifier and filter unit includes a fuse part and a first rectifier bridge D1, the input end of the fuse part is connected to the single-phase power supply, the live wire output end of the fuse part is connected to pin 2 of the first rectifier bridge D1, the neutral wire output end of the fuse part is connected to pin 3 of the first rectifier bridge D1, and pin 1 and pin 4 of the first rectifier bridge D1 are respectively connected to the input end of the switch unit.

[0008] In the electrostatic precipitator control circuit, the rectifier and filter unit also includes a first resistor R1 and a second capacitor C2, one end of the first resistor R1 is connected to pin 1 of the first rectifier bridge D1, the other end of the first resistor R1 is connected to the input end of the switch unit, and the two ends of the second capacitor C2 are respectively connected to the input end of the switch unit.

[0009] In the electrostatic precipitator control circuit, the switch unit includes a first switch part and a second switch part; the first switch part includes a first field effect transistor VT1 and a first voltage balancing part; the second switch part includes a second field effect transistor VT2 and a second voltage balancing part; the drain of the first field effect transistor VT1 is connected to pin 1 of the first rectifier bridge D1, the source of the first field effect transistor VT1 is connected to the drain of the second field effect transistor VT2, the source of the second field effect transistor VT2 is connected to pin 4 of the first rectifier bridge D1, one end of the first voltage balancing part is connected to the drain of the first field effect transistor VT1, one end of the second voltage balancing part is connected to the source of the second field effect transistor VT2, the other end of the first voltage balancing part is connected to the other end of the second voltage balancing part, the input end of the first resonance unit is connected to the connection between the source of the first field effect transistor VT1 and the drain of the second field effect transistor VT2, and the input end of the second resonance unit is connected to the connection between the first voltage balancing part and the second voltage balancing part.

[0010] In the electrostatic precipitator control circuit, the first resonant unit includes a seventh capacitor C7 and a resonant inductor LS; the second resonant unit includes an eighth capacitor C8; one end of the seventh capacitor C7 is connected to the connection between the source of the first field effect transistor VT1 and the drain of the second field effect transistor VT2, one end of the resonant inductor LS is connected to the connection between the first voltage equalizing part and the second voltage equalizing part, the other end of the seventh capacitor C7 is respectively connected to one end of the eighth capacitor C8 and the input end of the first transformer unit, the other end of the eighth capacitor C8 is connected to the input end of the second transformer unit, and the other end of the resonant inductor LS is respectively connected to the input ends of the first transformer unit and the second transformer unit.

[0011] In the electrostatic precipitator control circuit, the first transformer unit includes a first transformer T1 and a first rectifier; the second transformer unit includes a second transformer T2 and a second rectifier; the primary coil of the first transformer T1 is respectively connected to one end of the seventh capacitor C7 and one end of the resonant inductor LS, the primary coil of the second transformer T2 is respectively connected to one end of the eighth capacitor C8 and one end of the resonant inductor LS, the secondary coil of the first transformer T1 is connected to the input end of the first rectifier, the output end of the first rectifier is connected to the first electric field unit, the secondary coil of the second transformer T2 is connected to the input end of the second rectifier, and the output end of the second rectifier is connected to the second electric field unit.

[0012] The present application also provides a PCB board printed with the electrostatic precipitator control circuit as described above.

[0013] The present application also provides a controller that uses the electrostatic precipitator control circuit as described above to perform operation control.

[0014] Beneficial effects:

[0015] The utility model provides an electrostatic precipitator control circuit, which performs rectification and filtering processing on the electric energy of a single-phase power supply through a rectification and filtering unit to obtain a DC voltage, and then uses a half-bridge switching circuit composed of a switching unit to control the on-off of the DC voltage, and cooperates with a first resonance unit and a second resonance unit to perform oscillation processing on the DC voltage, converting the DC voltage into an AC pulse signal, and then respectively uses a first transformer unit and a second transformer unit to boost the pulse signal, and separately converts the boosted pulse signal into a DC high-voltage signal to power the first electric field unit and the second electric field power supply; by setting the first transformer unit and the second transformer unit, independent control of the two-way output is achieved, so that the first electric field unit and the second electric field unit do not affect each other when working, and when a flashover problem or a short circuit problem occurs in the second electric field unit, it will not affect the normal use of the first electric field unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A circuit block diagram of an electrostatic precipitator control circuit provided by the utility model;

[0017] Figure 2 This is a circuit structure diagram of the electrostatic precipitator control circuit provided by the utility model.

[0018] Explanation of main component symbols: 1-rectifier and filter unit, 2-first resonance unit, 3-second resonance unit, 4-first transformer unit, 5-second transformer unit, 6-first electric field unit, 7-second electric field unit, 8-switch unit, 9-single-phase power supply. DETAILED DESCRIPTION

[0019] The utility model provides an electrostatic precipitator control circuit, a PCB board and a controller thereof. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] In the description of the present utility model, it should be understood that the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0021] See also Figure 1 and Figure 2 The utility model provides an electrostatic precipitator control circuit, including a rectifier and filter unit 1, a switch unit 8, a first resonant unit 2, a second resonant unit 3, a first transformer unit 4, a second transformer unit 5, a first electric field unit 6 and a second electric field unit 7, the input end of the rectifier and filter unit 1 is connected to a single-phase power supply 9, the output end of the rectifier and filter unit 1 is connected to the switch unit 8, the output end of the switch unit 8 is respectively connected to the first resonant unit 2 and the second resonant unit 3, the output end of the first resonant unit 2 is connected to the input end of the first transformer unit 4, the output end of the first transformer unit 4 is connected to the first electric field unit 6, the output end of the second resonant unit 3 is connected to the input end of the second transformer unit 5, and the output end of the second transformer unit 5 is connected to the second electric field unit 7.

[0022] The working principle of the present application is as follows: the electric energy of the single-phase power supply 9 is rectified and filtered by the rectifier and filter unit 1 to obtain a DC voltage, and then the DC voltage is controlled on and off by a half-bridge switch circuit composed of the switch unit 8, and the DC voltage is oscillated in cooperation with the first resonance unit 2 and the second resonance unit 3 to convert the DC voltage into an AC pulse signal, and then the pulse signal is boosted by the first transformer unit 4 and the second transformer unit 5 respectively, and the boosted pulse signal is converted into a DC high-voltage signal to supply power to the first electric field unit 6 and the second electric field power supply; independent control of the two outputs is achieved by setting the first transformer unit 4 and the second transformer unit 5, so that the first electric field unit 6 and the second electric field unit 7 do not affect each other during operation, and when a flashover problem or a short circuit problem occurs in the second electric field unit 7, the normal use of the first electric field unit 6 will not be affected.

[0023] like Figure 1 to Figure 2As shown, further, the rectification and filtering unit 1 includes a fuse part and a first rectifier bridge D1, the input end of the fuse part is connected to the single-phase power supply 9, the live wire output end of the fuse part is connected to pin 2 of the first rectifier bridge D1, the neutral wire output end of the fuse part is connected to pin 3 of the first rectifier bridge D1, and pin 1 and pin 4 of the first rectifier bridge D1 are respectively connected to the input end of the switch unit 8; when working, the electric energy of the single-phase power supply 9 is connected to the first rectifier bridge D1 for rectification after passing through the fuse part, and the rectified DC voltage is input to the switch unit 8, so as to achieve the effect of rectification and filtering.

[0024] like Figure 1 to Figure 2 As shown, further, the rectification and filtering unit 1 also includes a first resistor R1 and a second capacitor C2, one end of the first resistor R1 is connected to the pin 1 of the first rectifier bridge D1, the other end of the first resistor R1 is connected to the input end of the switch unit 8, and the two ends of the second capacitor C2 are respectively connected to the input end of the switch unit 8; the first resistor R1 is used to buffer the rectified voltage, and then the rectified voltage is used to charge the second capacitor C2, and after the second capacitor C2 is fully charged, the DC voltage is transmitted to the switch unit 8.

[0025] like Figure 1 to Figure 2As shown, further, the switch unit 8 includes a first switch part and a second switch part; the first switch part includes a first field effect transistor VT1 and a first voltage balancing part; the second switch part includes a second field effect transistor VT2 and a second voltage balancing part; the drain of the first field effect transistor VT1 is connected to the pin 1 of the first rectifier bridge D1, the source of the first field effect transistor VT1 is connected to the drain of the second field effect transistor VT2, the source of the second field effect transistor VT2 is connected to the pin 4 of the first rectifier bridge D1, one end of the first voltage balancing part is connected to the drain of the first field effect transistor VT1, one end of the second voltage balancing part is connected to the source of the second field effect transistor VT2, the other end of the first voltage balancing part is connected to the other end of the second voltage balancing part, the input end of the first resonance unit 2 is connected to the connection between the source of the first field effect transistor VT1 and the drain of the second field effect transistor VT2, The input end of the second resonance unit 3 is connected to the connection between the first voltage equalizing part and the second voltage equalizing part; when working, the gates of the first field effect transistor VT1 and the second field effect transistor VT2 are respectively connected to the external controller, and the PWM signal of the external controller is received through the gates. The external controller outputs two complementary PWM signals, and the dead time of the PWM signal is 500nS. The two waveforms respectively control the first field effect transistor VT1 and the second field effect transistor VT2 to be alternately turned on, and the rectified DC voltage is converted into a high-frequency pulse AC voltage, and then the first resonance unit 2 and the second resonance unit 3 are used to oscillate the high-frequency pulse AC voltage so that the high-frequency pulse AC voltage reaches a suitable resonant frequency, and then the resonant voltage signal is supplied to the first transformer unit 4 and the second transformer unit 5; in addition, the first voltage equalizing part and the second voltage equalizing part are used to keep the voltage at both ends consistent, thereby improving the stability of the voltage at output.

[0026] In this embodiment, the first voltage equalizing part includes a second resistor R2 and a fifth capacitor C5 connected in parallel; the second voltage equalizing part includes a third resistor R3 and a sixth capacitor C6 connected in parallel; wherein the fifth capacitor C5 and the sixth capacitor C6 are energy storage voltage-dividing capacitors; the second resistor R2 and the third resistor R3 are voltage equalizing resistors, and the second resistor R2 and the third resistor R3 are used to ensure that the voltages across the fifth capacitor C5 and the sixth capacitor C6 are consistent.

[0027] like Figure 1 to Figure 2As shown, further, the first resonant unit 2 includes a seventh capacitor C7 and a resonant inductor LS; the second resonant unit 3 includes an eighth capacitor C8; one end of the seventh capacitor C7 is connected to the connection between the source of the first field effect transistor VT1 and the drain of the second field effect transistor VT2, one end of the resonant inductor LS is connected to the connection between the first voltage balancing part and the second voltage balancing part, the other end of the seventh capacitor C7 is respectively connected to one end of the eighth capacitor C8 and the input end of the first transformer unit 4, the other end of the eighth capacitor C8 is connected to the input end of the second transformer unit 5, and the other end of the resonant inductor LS is respectively connected to the input end of the first transformer unit 4 and the second transformer unit 5; when working, the high-frequency pulse AC voltage transmitted from the first field effect transistor VT1 and the second field effect transistor VT2 is oscillated by the seventh capacitor C7, the resonant inductor LS and the eighth capacitor C8, so that the high-frequency pulse AC voltage reaches a suitable resonant frequency, thereby improving the stability of the AC voltage during output.

[0028] like Figure 1 to Figure 2 As shown, further, the first transformer unit 4 includes a first transformer T1 and a first rectifier; the second transformer unit 5 includes a second transformer T2 and a second rectifier; the primary coil of the first transformer T1 is respectively connected to one end of the seventh capacitor C7 and one end of the resonant inductor LS, the primary coil of the second transformer T2 is respectively connected to one end of the eighth capacitor C8 and one end of the resonant inductor LS, the secondary coil of the first transformer T1 is connected to the input end of the first rectifier, the output end of the first rectifier is connected to the first electric field unit 6, the secondary coil of the second transformer T2 is connected to the input end of the second rectifier, and the output end of the second rectifier is connected to the second electric field unit 7; when working, the high-frequency pulse AC voltage is boosted by the first transformer T1 and the second transformer T2 respectively to achieve the working voltage required by the first electric field unit 6 and the second electric field unit 7, and the voltage after the boost is rectified and filtered by the first rectifier and the second rectifier, so that the working voltage is smoother and more stable, and the stability of the first electric field unit 6 and the second electric field unit 7 when working is improved.

[0029] In this embodiment, the first rectifier unit is composed of a first diode VD1, a second diode VD2, a third diode VD3 and a fourth diode VD4, and the first diode VD1, the second diode VD2, the third diode VD3 and the fourth diode VD4 form a rectifier bridge structure; the second rectifier unit is composed of a fifth diode VD5, a sixth diode VD6, a seventh diode VD7 and an eighth diode VD8, and the fifth diode VD5, the sixth diode VD6, the seventh diode VD7 and the eighth diode VD8 form a rectifier bridge structure.

[0030] It should be noted that the first electric field unit 6 may be a honeycomb electric field component; and the second electric field unit 7 may be a parallel plate electric field component.

[0031] The present application also provides a PCB board printed with the electrostatic precipitator control circuit as described above.

[0032] The present application also provides a controller that uses the electrostatic precipitator control circuit as described above to perform operation control.

[0033] To sum up, the rectifier and filter unit 1 is used to rectify and filter the electric energy of the single-phase power supply 9 to obtain a DC voltage, and then the half-bridge switching circuit composed of the switch unit 8 is used to control the on and off of the DC voltage, and the first resonance unit 2 and the second resonance unit 3 are used to oscillate the DC voltage to convert the DC voltage into an AC pulse signal, and then the first transformer unit 4 and the second transformer unit 5 are used to boost the pulse signal, and the boosted pulse signal is converted into a DC high-voltage signal to supply power to the first electric field unit 6 and the second electric field power supply; by setting the first transformer unit 4 and the second transformer unit 5, independent control of the two outputs is achieved, so that the first electric field unit 6 and the second electric field unit 7 do not affect each other during operation, and when the second electric field unit 7 has a flashover problem or a short circuit problem, it will not affect the normal use of the first electric field unit 6.

[0034] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the claims attached to the utility model.

Claims

1. An electrostatic precipitator control circuit, characterized in that: It includes a rectifier and filter unit, a switch unit, a first resonant unit, a second resonant unit, a first transformer unit, a second transformer unit, a first electric field unit and a second electric field unit. The input end of the rectifier and filter unit is connected to a single-phase power supply, the output end of the rectifier and filter unit is connected to the switch unit, the output end of the switch unit is respectively connected to the first resonant unit and the second resonant unit, the output end of the first resonant unit is connected to the input end of the first transformer unit, the output end of the first transformer unit is connected to the first electric field unit, the output end of the second resonant unit is connected to the input end of the second transformer unit, and the output end of the second transformer unit is connected to the second electric field unit.

2. The electrostatic precipitator control circuit according to claim 1, characterized in that: The rectifier and filter unit includes a fuse part and a first rectifier bridge D1, the input end of the fuse part is connected to the single-phase power supply, the live wire output end of the fuse part is connected to pin 2 of the first rectifier bridge D1, the neutral wire output end of the fuse part is connected to pin 3 of the first rectifier bridge D1, and pin 1 and pin 4 of the first rectifier bridge D1 are respectively connected to the input end of the switch unit.

3. The electrostatic precipitator control circuit according to claim 2, characterized in that: The rectification and filtering unit also includes a first resistor R1 and a second capacitor C2, one end of the first resistor R1 is connected to pin 1 of the first rectifier bridge D1, the other end of the first resistor R1 is connected to the input end of the switch unit, and both ends of the second capacitor C2 are respectively connected to the input end of the switch unit.

4. The electrostatic precipitator control circuit according to claim 2, characterized in that: The switch unit includes a first switch part and a second switch part; the first switch part includes a first field effect transistor VT1 and a first voltage equalizing part; the second switch part includes a second field effect transistor VT2 and a second voltage equalizing part; the drain of the first field effect transistor VT1 is connected to the pin 1 of the first rectifier bridge D1, the source of the first field effect transistor VT1 is connected to the drain of the second field effect transistor VT2, the source of the second field effect transistor VT2 is connected to the pin 4 of the first rectifier bridge D1, one end of the first voltage equalizing part is connected to the drain of the first field effect transistor VT1, one end of the second voltage equalizing part is connected to the source of the second field effect transistor VT2, the other end of the first voltage equalizing part is connected to the other end of the second voltage equalizing part, the input end of the first resonance unit is connected to the connection between the source of the first field effect transistor VT1 and the drain of the second field effect transistor VT2, and the input end of the second resonance unit is connected to the connection between the first voltage equalizing part and the second voltage equalizing part.

5. The electrostatic precipitator control circuit according to claim 4, characterized in that: The first resonant unit includes a seventh capacitor C7 and a resonant inductor LS; the second resonant unit includes an eighth capacitor C8; one end of the seventh capacitor C7 is connected to the connection between the source of the first field effect transistor VT1 and the drain of the second field effect transistor VT2, one end of the resonant inductor LS is connected to the connection between the first voltage equalizing part and the second voltage equalizing part, the other end of the seventh capacitor C7 is respectively connected to one end of the eighth capacitor C8 and the input end of the first transformer unit, the other end of the eighth capacitor C8 is connected to the input end of the second transformer unit, and the other end of the resonant inductor LS is respectively connected to the input ends of the first transformer unit and the second transformer unit.

6. The electrostatic precipitator control circuit according to claim 5, characterized in that: The first transformer unit includes a first transformer T1 and a first rectifier; the second transformer unit includes a second transformer T2 and a second rectifier; the primary coil of the first transformer T1 is respectively connected to one end of the seventh capacitor C7 and one end of the resonant inductor LS, the primary coil of the second transformer T2 is respectively connected to one end of the eighth capacitor C8 and one end of the resonant inductor LS, the secondary coil of the first transformer T1 is connected to the input end of the first rectifier, the output end of the first rectifier is connected to the first electric field unit, the secondary coil of the second transformer T2 is connected to the input end of the second rectifier, and the output end of the second rectifier is connected to the second electric field unit.

7. A PCB board, characterized in that: The PCB board is printed with an electrostatic precipitator control circuit as described in any one of claims 1-6.

8. A controller, characterized in that: The controller uses the electrostatic precipitator control circuit as described in any one of claims 1-6 to control the operation.

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