CN211481148U - Control circuit based on APFC - Google Patents
Control circuit based on APFC Download PDFInfo
- Publication number
- CN211481148U CN211481148U CN202020319872.5U CN202020319872U CN211481148U CN 211481148 U CN211481148 U CN 211481148U CN 202020319872 U CN202020319872 U CN 202020319872U CN 211481148 U CN211481148 U CN 211481148U
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- circuit
- apfc
- igbt
- power factor
- control circuit
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 230000033228 biological regulation Effects 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a control circuit based on APFC relates to motor control technical field, include: the device comprises a filter rectification circuit, an APFC power factor correction circuit, a switching power supply, an overvoltage discharge circuit, an intelligent power module, an MCU peripheral circuit, a differential current sampling circuit, a speed regulation circuit and a rotating speed feedback circuit; the application designs a control circuit based on APFC, wherein the overvoltage discharge circuit can absorb the electric energy generated by the motor to prevent the overvoltage of the main capacitor. The power factor of the control circuit can be greatly improved, the harmonic distortion degree is reduced, and the energy-saving effect is achieved.
Description
Technical Field
The utility model belongs to the technical field of the motor control technique and specifically relates to a control circuit based on APFC.
Background
The english expression of PFC is called "Power Factor Correction" and means "Power Factor Correction", and the Power Factor refers to the relationship between the effective Power and the total Power consumption (apparent Power), that is, the ratio of the effective Power divided by the total Power consumption (apparent Power).
There are two types of PFC currently, one is a passive PFC (also called passive PFC) and an active PFC (also called active PFC). The Active Power Factor Correction (APFC) technology has the advantages of improving the network-side Power Factor of the Power electronic device, reducing the line loss, saving the energy, reducing the harmonic pollution of the Power network, improving the Power supply quality of the Power network and the like, and is widely applied to many industries. Basically, the power factor can measure the effective utilization degree of the power, and when the power factor value is larger, the power utilization rate is higher. The power factor is a parameter for measuring the power efficiency of the electric equipment, and the low power factor represents the low power efficiency. A technique for increasing the power factor of a powered device is known as power factor correction.
However, the passive PFC circuit in the market has the disadvantage of low efficiency due to the increase of the PF value by sacrificing efficiency and stability.
Aiming at the phenomenon, the control circuit based on the APFC is designed, the power factor of the control circuit can be greatly improved, the harmonic distortion degree is reduced, and the energy-saving effect is achieved.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a control circuit based on APFC can improve control circuit's power factor greatly, has reduced the harmonic distortion degree, reaches energy-conserving effect.
In order to achieve the above object, the utility model provides a following technical scheme: a control circuit based on APFC comprises a filter rectification circuit, an APFC power factor correction circuit, a switching power supply, an overvoltage discharge circuit, an intelligent power module, an MCU peripheral circuit, a differential current sampling circuit, a speed regulation circuit and a rotating speed feedback circuit, wherein the overvoltage discharge circuit is connected with the output end of the APFC power factor correction circuit; the APFC power factor correction circuit and the switch power supply are connected with a mains supply through the filter rectification circuit, the output end of the APFC power factor correction circuit is connected to the intelligent power module through the overvoltage discharge circuit, the switch power supply provides direct current for the MCU peripheral circuit, the intelligent power module is electrically connected with the MCU peripheral circuit through the differential current sampling circuit, the output end of the intelligent power module is connected with the motor, the speed regulation circuit is connected to the input end of the MCU peripheral circuit, and the rotating speed feedback circuit is connected to the output end of the MCU peripheral circuit.
Furthermore, the overvoltage discharging circuit is composed of a driving circuit, an IGBT and a discharging resistor, an IGBT driver is arranged in the driving circuit, a pin 1 of the IGBT driver is electrically connected with the switching power supply, a pin 3 of the IGBT driver is connected to the output end of the MCU peripheral circuit, a pin 5 of the IGBT driver is connected to one end of a grid resistor, the other end of the grid resistor is connected to the IGBT, and one end of the IGBT is connected with the discharging resistors R32 and R33 which are connected in parallel and an external resistor.
Further, the IGBT is connected with an indicator light LED3 in parallel.
Further, the IGBT driver employs a chip model IR 2101S.
Further, the APFC power factor correction circuit adopts a chip with the model of UCC 28019.
The embodiment of the utility model provides a control circuit based on APFC, through exchanging 220V's commercial power, gives APFC power factor correction circuit and switching power supply part power supply. After being electrified, the motor can be started through the serial port or the speed regulating circuit. The control panel consists of a filter rectification circuit, an APFC power factor correction circuit, a switching power supply, an overvoltage discharge circuit, an intelligent power module, an MCU peripheral circuit, a differential current sampling circuit, a speed regulation circuit and a rotating speed feedback circuit. The overvoltage discharging circuit in this application can absorb the electric energy that the motor produced, prevents that the main capacitor from overvoltage. The control panel has wide voltage application range, high power factor and low total harmonic distortion, greatly reduces the harmonic fed back to the power grid, and plays the roles of saving energy, reducing consumption and reducing power grid pollution.
Drawings
Fig. 1 is a control flow chart of a control circuit provided in an embodiment of the present invention;
fig. 2 is a circuit diagram of an over-voltage discharge circuit provided by an embodiment of the present invention;
fig. 3 is a control schematic diagram of a control circuit according to an embodiment of the present invention;
fig. 4 is a circuit diagram of an APFC power factor correction circuit provided by an embodiment of the present invention;
fig. 5 is a circuit diagram of the MCU peripheral provided by the embodiment of the present invention;
fig. 6 is a sampling circuit diagram provided in an embodiment of the present invention;
fig. 7 is a circuit diagram of an intelligent power module according to an embodiment of the present invention;
fig. 8 is a circuit diagram of the speed regulation provided by the embodiment of the present invention.
Detailed Description
In the following, the technical solutions of the embodiments of the present invention are described clearly and completely with reference to the drawings in the present application, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
For ease of understanding and explanation, the following detailed description describes an APFC-based control circuit according to an embodiment of the present invention.
As shown in fig. 1-8, an APFC-based control circuit includes a filter rectifier circuit, an APFC power factor correction circuit, a switching power supply, an overvoltage discharge circuit, an intelligent power module, a MCU peripheral circuit, a differential current sampling circuit, a speed regulation circuit, and a rotation speed feedback circuit, where the overvoltage discharge circuit is connected to an output terminal of the APFC power factor correction circuit, and the differential current sampling circuit employs a closed-loop current differential sampling circuit, so as to more effectively achieve the purpose of common-mode interference resistance, and the intelligent power module has a small integrated circuit size, space saving, and good heat dissipation; vsp may be used to set a motor target speed;
the APFC power factor correction circuit and the switch power supply are connected with a mains supply through the filter rectification circuit, the output end of the APFC power factor correction circuit is connected to the intelligent power module through the overvoltage discharge circuit, the switch power supply provides direct current for the MCU peripheral circuit, the intelligent power module is electrically connected with the MCU peripheral circuit through the differential current sampling circuit, the output end of the intelligent power module is connected with the motor, the speed regulation circuit is connected to the input end of the MCU peripheral circuit, and the rotating speed feedback circuit is connected to the output end of the MCU peripheral circuit.
The overvoltage discharging circuit is composed of a driving circuit, an IGBT and a discharging resistor, wherein an IGBT driver is arranged in the driving circuit, a pin 1 of the IGBT driver is electrically connected with the switching power supply, a pin 3 of the IGBT driver is connected to the output end of the MCU peripheral circuit, a pin 5 of the IGBT driver is connected to one end of a grid resistor, the other end of the grid resistor is connected to the IGBT, and one end of the IGBT is connected with the discharging resistors R32 and R33 which are connected in parallel and an external resistor.
The APFC control circuit is an APFC control board with the full-amplitude voltage of AC 190V-260V 600W based on the SPC1068, the circuit integration level of the SPC1068 control system is high, and a solution with high cost performance can be realized. The APFC power factor correction circuit and the switching power supply part are powered by supplying 220V alternating current commercial power. After being electrified, the motor can be started through the serial port or the speed regulating circuit. After voltage sampling is carried out on the main capacitor, signals are fed back to the MCU, the MCU judges whether the voltage is overvoltage or not, if the voltage is overvoltage, PWM signals are sent to the discharge circuit, and the discharge circuit is opened to discharge.
Referring to fig. 1, in the control circuit based on the APFC according to embodiment 1 of the present invention, the IGBT driver uses a chip with a model number of IR2101S, the IR2101S chip is an IGBT driver, the operating voltage is 15V, and the IGBT driver can convert a received PWM control signal of the MCU into a driving signal of the power device, so that the control signal and the power driving signal do not interfere with each other. The IGBT is connected with an indicator light LED3 in parallel, a pin 1 of an IR2101S chip in the circuit is connected with 15V voltage divided by a switching power supply, when the circuit is over-voltage, a main control chip SPC1068 MCU can generate a PWM signal to a chip U6, a pin 3 of the chip U6 can generate a 15V power driving signal after receiving the PWM signal sent by the MCU, and after grid electrode oscillation is eliminated through a grid electrode resistor R38, the IGBT is driven to be conducted, so that a current loop is formed by a discharge resistor R32, a discharge resistor R33 or an external resistor and a main capacitor to complete a discharge function, and meanwhile, the discharge indicator light LED3 emits light to prompt that a discharge effect is in progress.
Referring to fig. 4, in the control circuit based on the APFC according to embodiment 2 of the present invention, the APFC power factor correction circuit is a chip of the UCC28019 model. The voltage has wide application range, improves the power factor of the input side, reduces the total harmonic distortion, greatly reduces the harmonic fed back to the power grid, and plays the roles of saving energy, reducing consumption and reducing power grid pollution.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the embodiments, and any changes that can be considered by those skilled in the art shall fall within the protection scope of the present invention.
Claims (5)
1. An APFC-based control circuit, comprising: the device comprises a filter rectification circuit, an APFC power factor correction circuit, a switching power supply, an overvoltage discharge circuit, an intelligent power module, an MCU peripheral circuit, a differential current sampling circuit, a speed regulation circuit and a rotating speed feedback circuit; the APFC power factor correction circuit and the switch power supply are connected with a mains supply through the filter rectification circuit, the output end of the APFC power factor correction circuit is connected to the intelligent power module through the overvoltage discharge circuit, the switch power supply provides direct current for the MCU peripheral circuit, the intelligent power module is electrically connected with the MCU peripheral circuit through the differential current sampling circuit, the output end of the intelligent power module is connected with the motor, the speed regulation circuit is connected to the input end of the MCU peripheral circuit, and the rotating speed feedback circuit is connected to the output end of the MCU peripheral circuit.
2. The APFC-based control circuit as claimed in claim 1, wherein the overvoltage discharging circuit is composed of a driving circuit, an IGBT and a discharging resistor, an IGBT driver is arranged in the driving circuit, pin No. 1 of the IGBT driver is electrically connected with the switching power supply, pin No. 3 of the IGBT driver is connected to the output end of the MCU peripheral circuit, pin No. 5 of the IGBT driver is connected to one end of a grid resistor, the other end of the grid resistor is connected to the IGBT, and one end of the IGBT is connected with the discharging resistors R32 and R33 which are connected in parallel and an external resistor.
3. The APFC-based control circuit as claimed in claim 2, wherein the IGBT is connected in parallel with an indicator LED 3.
4. The APFC-based control circuit as claimed in claim 2, wherein the IGBT driver is a chip model IR 2101S.
5. The APFC-based control circuit of claim 1, wherein the APFC power factor correction circuit is a UCC28019 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020319872.5U CN211481148U (en) | 2020-03-13 | 2020-03-13 | Control circuit based on APFC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020319872.5U CN211481148U (en) | 2020-03-13 | 2020-03-13 | Control circuit based on APFC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211481148U true CN211481148U (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020319872.5U Expired - Fee Related CN211481148U (en) | 2020-03-13 | 2020-03-13 | Control circuit based on APFC |
Country Status (1)
| Country | Link |
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| CN (1) | CN211481148U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113541468A (en) * | 2021-08-20 | 2021-10-22 | 广州市保伦电子有限公司 | PFC power expansion and double-tube current-sharing driving circuit |
-
2020
- 2020-03-13 CN CN202020319872.5U patent/CN211481148U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113541468A (en) * | 2021-08-20 | 2021-10-22 | 广州市保伦电子有限公司 | PFC power expansion and double-tube current-sharing driving circuit |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200911 |