A DSP digital high-voltage direct-current power supply control module

Abstract

The application discloses a DSP digital high-voltage direct-current power supply control module, which comprises a PFC power factor correction module, a switching device and a rectification filtering module; the PFC power factor correction module is sequentially connected with a first voltage and current conversion module, a first ADC analog-digital conversion module, a first PI linear controller, a first pulse output module for outputting a first pulse control signal outward, and a first driving module for driving the PFC power factor correction module to output high-power and stable direct current according to the first pulse control signal; the switching device is sequentially connected with a second voltage and current conversion module, a second ADC analog-digital conversion module, a second PI linear controller, a second pulse output module for outputting a second pulse control signal outward, and a second driving module for driving the switching device to work so that the rectification filtering module outputs stable direct current according to the second pulse control signal, so that the digital high-voltage direct-current power supply is controlled to realize super-high conversion efficiency and output stable power supply.

Description

[Technical field]

[0001] The invention relates to a DSP digital high-voltage direct current power supply control module. [Background Technology]

[0002] Existing power supplies for neon linear lights have low power output conversion efficiency, resulting in a large amount of power waste. At the same time, the dynamic response of the power output is slow, the output voltage is unstable and has low accuracy, making it difficult for neon linear lights to illuminate according to control commands. [Summary of the invention]

[0003] The present invention overcomes the deficiencies of the prior art and provides a DSP digital high-voltage direct current power supply control module.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A DSP digital high-voltage DC power supply control module, characterized in that it includes a PFC power factor correction module for correcting the power factor of the power supply, a switching device for converting DC power into AC power, and a rectification and filtering module for rectifying and filtering the AC power; the PFC power factor correction module is sequentially connected to a first voltage-current conversion module for converting the AC voltage and current at the input end of the PFC power factor correction module and the DC voltage and current at the output end into AC / DC voltage and current analog signals, a first ADC analog-to-digital conversion module for converting the AC / DC voltage and current analog signals into AC / DC voltage and current digital signals, a first PI linear controller for linearly controlling and outputting a first pulse control signal according to preset parameters and the AC / DC voltage and current digital signals, a first pulse output module for outputting the first pulse control signal, and a first pulse output module for outputting the first pulse control signal according to the first pulse. The first driving module drives the PFC power factor correction module to work so that the AC current phase is consistent with the AC voltage phase and the PFC power factor correction module outputs stable DC power; the switching device is sequentially connected to a second voltage-current conversion module for converting the DC voltage and current at the input end of the switching device and the DC voltage and current at the output end of the rectifier and filter module into a DC voltage and current analog signal, a second ADC analog-to-digital conversion module for converting the DC voltage and current analog signal into a DC voltage and current digital signal, a second PI linear controller for outputting a second pulse control signal according to preset parameters and linear control of the DC voltage and current digital signal, a second pulse output module for outputting the second pulse control signal, and a second driving module for driving the switching device to work according to the second pulse control signal so that the rectifier and filter module outputs stable DC power.

[0006] The DSP digital high-voltage DC power supply control module as described above is characterized in that: the first PI linear controller is connected to a first preset parameter module for preset parameters; the second PI linear controller is connected to a second preset parameter module for preset parameters.

[0007] The DSP digital high-voltage DC power supply control module as described above is characterized in that an isolation communication module for communication is connected between the first PI linear controller and the second PI linear controller.

[0008] The DSP digital high-voltage DC power supply control module as described above is characterized in that: the first PI linear controller is connected to a first SCI serial communication interface module connected to the isolation communication module, and the second PI linear controller is connected to a second SCI serial communication interface module connected to the isolation communication module.

[0009] The DSP digital high-voltage DC power supply control module described above is characterized in that the second PI linear controller is connected to a host device for receiving digital high-voltage DC power supply operating data and sending control commands to the digital high-voltage DC power supply.

[0010] The DSP digital high-voltage DC power supply control module as described above is characterized in that a communication bus is connected between the second PI linear controller and the host device.

[0011] The DSP digital high-voltage DC power supply control module as described above is characterized in that the communication bus is a CAN bus or a 485 bus.

[0012] The DSP digital high-voltage DC power supply control module as described above is characterized in that the upper device is a host computer or a server.

[0013] The beneficial effects of the present invention are:

[0014] The present invention provides a first PI linear controller, which outputs a first pulse control signal to a first driving module according to preset parameters and AC and DC voltage and current digital signals through linear control. The first driving module drives a PFC power factor correction module according to the first pulse control signal to make the AC current phase consistent with the AC voltage phase and make the PFC power factor correction module output high-power and stable DC power, and controls the DSP digital high-voltage DC power supply to achieve ultra-high conversion efficiency, thereby achieving energy conservation and emission reduction. At the same time, a second PI linear controller is provided, which outputs a second pulse control signal to a second driving module according to preset parameters and DC voltage and current digital signals through linear control. The second driving module drives a switching device according to the second pulse control signal to make the rectifier and filter module output stable DC power, thereby achieving the output of a stable and high-precision power supply to the neon linear lamp. [Brief Description of the Drawings]

[0015] Figure 1 This is a schematic diagram of the principle of the present invention. [Specific implementation method]

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0017] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. In addition, the descriptions of "preferred", "sub-preferred", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "preferred" or "sub-preferred" may explicitly or implicitly include at least one such feature.

[0018] like Figure 1As shown, a DSP digital high-voltage DC power supply control module includes an EMI filter module 21 for filtering electromagnetic interference from the power grid, a PFC power factor correction module 1 for improving the power factor of the power supply, a switching device 2 for converting the DC power output by the PFC power factor correction module 1 into AC power, a transformer 22 for stepping down the AC power output by the switching device 2, and a rectifier and filter module 3 for rectifying and filtering the AC power output by the transformer 22 and outputting DC power to the neon linear lamp. The DSP digital high-voltage DC power supply control module comprises a first voltage-current conversion module 4 connected in sequence with a PFC power factor correction module 1 for converting the AC voltage and current at the input end and the DC voltage and current at the output end of the PFC power factor correction module 1 into an AC / DC voltage and current analog signal, a first ADC analog-to-digital conversion module 5 for converting the AC / DC voltage and current analog signal into an AC / DC voltage and current digital signal, a first PI linear controller 6 for outputting a first pulse control signal according to preset parameters and linear control of the AC / DC voltage and current digital signal, a first pulse output module 7 for outputting the first pulse control signal, and a first pulse control module for driving the PFC power factor correction module 1 to work according to the first pulse control signal so that the AC current phase is consistent with the AC voltage phase and the P The FC power factor correction module 1 outputs a first drive module 8 for stable DC power. The switch device 2 is sequentially connected to a second voltage / current conversion module 9 for converting the DC voltage / current at the input of the switch device 2 and the DC voltage / current at the output of the rectifier / filter module 3 into a DC voltage / current analog signal; a second ADC analog-to-digital conversion module 10 for converting the DC voltage / current analog signal into a DC voltage / current digital signal; a second PI linear controller 11 for linearly controlling and outputting a second pulse control signal based on preset parameters and the DC voltage / current digital signal; a second pulse output module 12 for outputting the second pulse control signal; and a second drive module 13 for driving the switch device 2 according to the second pulse control signal to enable the rectifier / filter module 3 to output stable DC power. The first PI linear controller 6 is connected to a first preset parameter module 14 for presetting parameters; and the second PI linear controller 11 is connected to a second preset parameter module 15 for presetting parameters.

[0019] During actual operation, a first reference voltage Verf1 and a first reference voltage Verf2 are preset in the first preset parameter module 14 and the second preset parameter module 15 respectively; in the process of correcting the power factor of the power supply, the first voltage-current conversion module 4 converts the AC voltage and current at the input end and the DC voltage and current at the output end of the PFC power factor correction module 1 into AC and DC voltage and current analog signals, and then the first ADC analog-to-digital conversion module 5 converts the AC and DC voltage and current analog signals into AC and DC voltage and current digital signals and sends them to the first PI linear controller 6. The first PI linear controller 6 forms a control deviation based on the given reference voltage value and the actual detection voltage and current value, and forms a control quantity through a linear combination of the proportion and integral of the deviation, and then outputs a first pulse control signal to the first driving module 8 through the first pulse output module 7. The first driving module 8 drives the PFC power factor correction module 1 to work according to the first pulse control signal so that the AC current phase is consistent with the AC voltage phase and The PFC power factor correction module 1 outputs high-power and stable DC power, controls the DSP digital high-voltage DC power supply to achieve ultra-high conversion efficiency, and realizes energy conservation and emission reduction; at the same time, the second voltage-current conversion module 9 converts the DC voltage and current at the input end of the switching device 2 and the DC voltage and current at the output end of the rectifier and filter module 3 into DC voltage and current analog signals, and then the second ADC analog-to-digital conversion module 10 converts the DC voltage and current analog signals into DC voltage and current digital signals and sends them to the second PI linear controller 11. The second PI linear controller 11 forms a control deviation based on a given reference voltage value and an actual detected voltage and current value, and forms a control quantity through a linear combination of the proportion and integral of the deviation, and then outputs a second pulse control signal to the second drive module 13 through the second pulse output module 12. The second drive module 13 drives the switching device 2 to work according to the second pulse control signal so that the rectifier and filter module 3 outputs stable DC power, thereby realizing the output of a stable and high-precision power supply to the neon linear lamp.

[0020] like Figure 1As shown, an isolation communication module 16 for communication is connected between the first PI linear controller 6 and the second PI linear controller 11; the first PI linear controller 6 is connected to a first SCI serial communication interface module 17 connected to the isolation communication module 16, and the second PI linear controller 11 is connected to a second SCI serial communication interface module 18 connected to the isolation communication module 16; the second PI linear controller 11 is connected to a host device 19 for receiving digital high-voltage DC power supply working data and sending control commands to the digital high-voltage DC power supply, and the host device 19 is a host computer or a server, and a communication bus 20 is connected between the second PI linear controller 11 and the host device 19; the communication bus 20 is a CAN bus or a 485 bus. The working mode of the digital high-voltage DC power supply is reported through the CAN bus or the 485 bus, and real-time working data such as input voltage, input current, output voltage, output current, and real-time temperature can be uploaded to the server or host computer. The server or host computer monitors and controls to achieve safety protection such as input undervoltage, input and output overvoltage, overcurrent, short circuit, and overtemperature. At the same time, the server or host computer can also send control commands to the first PI linear controller 6 and the second PI linear controller 11 of the digital high-voltage DC power supply to change the working mode of the digital high-voltage DC power supply and the output voltage and output current, etc., thereby realizing digitalization in information feedback.

[0021] like Figure 1 As shown, in this case, the first ADC analog-to-digital conversion module 5, the first PI linear controller 6, the first pulse output module 7, the first preset parameter module 14, and the first SCI serial communication interface module 17 are integrated into a DSP digital control chip; the second ADC analog-to-digital conversion module 10, the second PI linear controller 11, the second pulse output module 12, the second preset parameter module 15, and the second SCI serial communication interface module 18 are integrated into another DSP digital control chip, which is convenient for assembly and connection.

[0022] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A DSP digital high-voltage DC power supply control module, characterized by: The invention comprises a PFC power factor correction module (1) for correcting the power factor of a power supply, a switch device (2) for converting direct current into alternating current, and a rectifying and filtering module (3) for rectifying and filtering the alternating current; the PFC power factor correction module (1) is sequentially connected to a first voltage and current conversion module (4) for converting the alternating current voltage and current at the input end and the direct current voltage and current at the output end of the PFC power factor correction module (1) into alternating current and direct current voltage and current analog signals, a first ADC analog-to-digital conversion module (5) for converting the alternating current and direct current voltage and current analog signals into alternating current and direct current voltage and current digital signals, a first PI linear controller (6) for outputting a first pulse control signal according to a preset parameter and the alternating current and direct current voltage and current digital signals, a first pulse output module (7) for outputting the first pulse control signal, and a first pulse output module (8) for driving the PFC power factor correction module (1) according to the first pulse control signal. ) operates to make the AC current phase consistent with the AC voltage phase and enables the PFC power factor correction module (1) to output a stable DC power; the switch device (2) is sequentially connected to a second voltage-current conversion module (9) for converting the DC voltage and current at the input end of the switch device (2) and the DC voltage and current at the output end of the rectifier filter module (3) into a DC voltage and current analog signal, a second ADC analog-to-digital conversion module (10) for converting the DC voltage and current analog signal into a DC voltage and current digital signal, a second PI linear controller (11) for outputting a second pulse control signal according to a preset parameter and the DC voltage and current digital signal linear control, a second pulse output module (12) for outputting the second pulse control signal, and a second drive module (13) for driving the switch device (2) to operate according to the second pulse control signal so that the rectifier filter module (3) outputs a stable DC power.

2. The DSP digital high-voltage DC power supply control module according to claim 1, characterized in that: The first PI linear controller (6) is connected to a first preset parameter module (14) for preset parameters; the second PI linear controller (11) is connected to a second preset parameter module (15) for preset parameters.

3. The DSP digital high-voltage DC power supply control module according to claim 1, characterized in that: An isolation communication module (16) for communication is connected between the first PI linear controller (6) and the second PI linear controller (11).

4. The DSP digital high-voltage DC power supply control module according to claim 3, characterized in that: The first PI linear controller (6) is connected to a first SCI serial communication interface module (17) connected to the isolation communication module (16), and the second PI linear controller (11) is connected to a second SCI serial communication interface module (18) connected to the isolation communication module (16).

5. The DSP digital high-voltage DC power supply control module according to claim 3, characterized in that: The second PI linear controller (11) is connected to a host device (19) for receiving digital high-voltage DC power supply operating data and sending control commands to the digital high-voltage DC power supply.

6. The DSP digital high-voltage DC power supply control module according to claim 5, characterized in that: A communication bus (20) is connected between the second PI linear controller (11) and the host device (19).

7. The DSP digital high-voltage DC power supply control module according to claim 6, characterized in that: The communication bus (20) is a CAN bus or a 485 bus.

8. The DSP digital high-voltage DC power supply control module according to claim 6, characterized in that: The upper device (19) is a host computer or a server.

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