CN118572982A - DSP digital high-voltage direct-current power supply control module - Google Patents

Abstract

The invention discloses a digital high-voltage direct-current power supply control module of a Digital Signal Processor (DSP), which comprises a Power Factor Correction (PFC) module, a switching device and a rectifying and filtering module; the PFC power factor correction module is sequentially connected with a first voltage-current conversion module, a first ADC analog-to-digital conversion module, a first PI linear controller, a first pulse output module for outputting a first pulse control signal outwards, 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 the second voltage-current conversion module, the second ADC module, the second PI linear controller, the second pulse output module for outputting a second pulse control signal outwards and the second driving module for driving the switching device to work according to the second pulse control signal so as to enable the rectification filter module to output stable direct current, thereby controlling the digital high-voltage direct current power supply to realize ultrahigh conversion efficiency and outputting a stable power supply.

Description

A DSP digital high voltage DC power supply control module

[Technical field]

The invention relates to a DSP digital high-voltage direct current power supply control module.

[Background Technology]

The existing power supply for neon linear lamps has 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 the accuracy is low, making it difficult for the neon linear lamp to emit light according to the control command.

[Summary of the invention]

The invention overcomes the shortcomings of the prior art and provides a DSP digital high-voltage direct current power supply control module.

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

A DSP digital high-voltage direct current power supply control module, characterized in that: it includes a PFC power factor correction module for correcting a power factor of a power supply, a switch device for converting direct current into alternating current, and a rectifying and filtering module for rectifying and filtering the alternating current; the PFC power factor correction module is sequentially connected to a first voltage and current conversion module for converting the alternating current voltage and current at the input end of the PFC power factor correction module and the direct current voltage and current at the output end into an alternating current and direct current voltage and current analog signal, a first ADC analog-to-digital conversion module for converting the alternating current and direct current voltage and current analog signal into an alternating current and direct current voltage and current digital signal, a first PI linear controller for outputting a first pulse control signal according to a preset parameter and the linear control of the alternating current and direct current voltage and current digital signal, 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 by using a pulse control signal so that the AC current phase is consistent with the AC voltage phase and the PFC power factor correction module outputs a stable DC power; the switch device is sequentially connected to a second voltage-current conversion module for converting the DC voltage and current at the input end of the switch device and the DC voltage and current at the output end of the rectification and filtering 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 a preset parameter and a 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 switch device to work according to the second pulse control signal so that the rectification and filtering module outputs a stable DC power.

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.

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.

A 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.

The DSP digital high-voltage DC power supply control module as 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 working data and sending control commands to the digital high-voltage DC power supply.

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.

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.

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.

The beneficial effects of the present invention are:

The present invention sets a first PI linear controller, and the first PI linear controller outputs a first pulse control signal to the first driving module according to preset parameters and AC and DC voltage and current digital signals. The first driving module drives the PFC power factor correction module 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 outputs 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 set, and the second PI linear controller outputs a second pulse control signal to the second driving module according to preset parameters and DC voltage and current digital signals. The second driving module drives the switching device to work according to the second pulse control signal so that the rectifier and filter module outputs stable DC power, thereby achieving the output of stable and high-precision power to the neon linear lamp.

[Drawings]

FIG1 is a schematic diagram of the present invention.

[Specific implementation method]

The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention 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 used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "preferred" or "sub-preferred" may explicitly or implicitly include at least one such feature.

As shown in FIG1 , a DSP digital high-voltage DC power supply control module includes an EMI filter module 21 for filtering electromagnetic interference of a power grid, a PFC power factor correction module 1 for improving the power factor of a power supply, a switch device 2 for converting the DC power outputted by the PFC power factor correction module 1 into AC power, a transformer 22 for reducing the voltage of the AC power outputted by the switch device 2, and a rectifier and filter module 3 for rectifying and filtering the AC power outputted by the transformer 22 and outputting DC power to a neon linear lamp. The DSP digital high-voltage DC power supply control module comprises a first voltage-current conversion module 4 which is sequentially connected to a PFC power factor correction module 1 and is used to convert 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, a first ADC analog-to-digital conversion module 5 which converts the AC and DC voltage and current analog signals into AC and DC voltage and current digital signals, a first PI linear controller 6 which outputs a first pulse control signal according to preset parameters and linear control of the AC and DC voltage and current digital signals, a first pulse output module 7 which outputs the first pulse control signal, and a first pulse control module 8 which 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 is driven ... The FC power factor correction module 1 outputs a first driving module 8 of stable direct current; the switch device 2 is sequentially connected with a second voltage and 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 and 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 a linear control of the DC voltage and current digital signal, a second pulse output module 12 for outputting a second pulse control signal, and a second driving module 13 for driving the switch device 2 to work according to the second pulse control signal so that the rectifier and filter module 3 outputs a stable direct current. Among them, the first PI linear controller 6 is connected with a first preset parameter module 14 for preset parameters; the second PI linear controller 11 is connected with a second preset parameter module 15 for preset parameters.

In actual operation, the first reference voltage Verf1 and the 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 of the PFC power factor correction module 1 and the DC voltage and current at the output end 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 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 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 direct current, controls the DSP digital high-voltage direct current 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 direct current voltage and current at the input end of the switch device 2 and the direct current voltage and current at the output end of the rectifier and filter module 3 into direct current voltage and current analog signals, and then the second ADC analog-to-digital conversion module 10 converts the direct current voltage and current analog signals into direct current 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 switch device 2 to work according to the second pulse control signal so that the rectifier and filter module 3 outputs stable direct current, thereby realizing the output of a stable and high-precision power supply to the neon linear lamp.

As shown in Figure 1, 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 working data of a digital high-voltage DC power supply 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, real-time temperature, etc. can be uploaded to the server or the host computer. The server or the host computer monitors and controls to realize input undervoltage, input and output overvoltage, overcurrent, short circuit, overtemperature and other safety protections; at the same time, the server or the 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., so as to realize digitalization in information feedback.

As shown in Figure 1, 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 for easy assembly and connection.

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 changes made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims (8)

1. A DSP digital high-voltage direct current power supply control module, characterized in that: it comprises a PFC power factor correction module (1) for correcting a 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 linearly controlling and outputting a first pulse control signal according to preset parameters 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 ADC module for driving the first ADC module (5) according to the first pulse control signal. The PFC power factor correction module (1) operates to make the AC current phase consistent with the AC voltage phase and to make the PFC power factor correction module (1) output a first driving module (8) of 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 and 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 driving module (13) for driving the switch device (2) to operate according to the second pulse control signal so that the rectifier and filter module (3) outputs stable DC power. 2. A 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. A 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. A 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. A 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 working data and sending control commands to the digital high-voltage DC power supply. 6. A 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 upper device (19). 7. A DSP digital high-voltage direct current power supply control module according to claim 6, characterized in that the communication bus (20) is a CAN bus or a 485 bus. 8. A DSP digital high-voltage direct current power supply control module according to claim 6, characterized in that the upper device (19) is a host computer or a server.