Direct-current power supply system

Abstract

The embodiment of the invention discloses a direct-current power supply system. The system comprises a control module, a plurality of groups of direct-current power supplies isolated from one another and a plurality of voltage regulating potentiometers, each group of direct-current power supply comprises a first program-controlled power conversion module and a second program-controlled power conversion module which are connected in parallel, the control module comprises an interface unit, and the control module and the multiple groups of direct-current power supplies are powered by an external power supply; the interface unit is used for receiving a plurality of groups of output direct-current voltage range parameters and a plurality of startup and shutdown instructions sent by an upper computer; the plurality of voltage regulating potentiometers are used for regulating the plurality of groups of direct-current voltage values output by the plurality of groups of direct-current power supplies and generating a plurality of voltage regulating potentiometer signals; the control module is used for generating a plurality of startup and shutdown signals according to the plurality of startup and shutdown instructions, and generating a plurality of control signals according to the plurality of groups of output direct-current voltage range parameters and the plurality of read voltage regulating potentiometer signals; and the multiple groups of direct-current power supplies are used for starting up according to the multiple startup and shutdown signals and outputting multiple groups of direct-current voltages according to the power supply signal of the external power supply and the multiple control signals.

Description

Technical Field

[0001] This invention relates to the field of DC power supplies. More specifically, it relates to a DC power supply system. Background Technology

[0002] Currently, existing multi-channel isolated output DC power supplies have weak human-machine interaction. Monitoring and display systems are usually located externally to the DC power supply, requiring numerous cables to connect them, making the DC power supply system complex and space-consuming. Once parameters such as output voltage range, overvoltage protection points, and overcurrent protection points are set internally in the DC power supply, they are difficult to change. The display section typically uses a display screen to show the power supply parameters, but display screens are expensive and less reliable and adaptable to different environments than digital tubes and indicator lights.

[0003] Existing DC power supplies cannot achieve good human-machine interaction in limited spaces, and the power output parameters cannot be flexibly configured. They are also not suitable for DC power supply applications with high requirements in terms of cost control, reliability, and environmental adaptability. Summary of the Invention

[0004] The purpose of this invention is to provide a DC power supply system to solve at least one of the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The first aspect of the present invention provides a DC power supply system, which includes a control module, multiple isolated DC power supplies, and multiple voltage regulating potentiometers corresponding one-to-one with the multiple DC power supplies; wherein each DC power supply includes a first programmable power conversion module and a second programmable power conversion module connected in parallel, the control module includes an interface unit, and the control module and the multiple DC power supplies are powered by an external power source.

[0007] The interface unit is used to receive multiple sets of output DC voltage range parameters and multiple power on / off commands sent by the host computer, which correspond one-to-one with the multiple sets of DC power supplies.

[0008] The plurality of voltage-adjusting potentiometers are used to adjust the plurality of DC voltage values ​​output by the plurality of DC power supplies and generate a plurality of voltage-adjusting potentiometer signals.

[0009] The control module is used to generate multiple power-on / off signals according to the multiple power-on / off commands, and is also used to generate multiple control signals corresponding one-to-one with the multiple sets of DC power supplies according to the multiple sets of output DC voltage range parameters and the multiple voltage regulating potentiometer signals read.

[0010] The multiple DC power supplies are used to power on the device according to the multiple power-on / off signals, and to output multiple DC voltages according to the power supply signal from the external power supply and the multiple control signals.

[0011] Optionally, the control module includes an analog-to-digital sampling filter circuit, a controller, and a secondary power supply circuit;

[0012] The analog-to-digital sampling and filtering circuit is used to collect the signals from the multiple voltage regulators and convert them into corresponding digital signals to be sent to the controller.

[0013] The secondary power supply circuit is used to receive the power signal and supply power to the analog-to-digital sampling filter circuit and the controller.

[0014] Optionally, each DC power supply includes a first programmable power conversion module and a second programmable power conversion module connected in parallel;

[0015] Each DC power supply is used to determine whether the voltage value of the first voltage is greater than or equal to the voltage value of the second voltage when the first programmable power conversion module outputs the first voltage and the second programmable power conversion module outputs the second voltage. If yes, the first voltage is output; otherwise, the second voltage is output.

[0016] Optionally, the first programmable power conversion module is further configured to acquire the first voltage, the first current, and the first temperature of the first programmable power conversion module output by the first programmable power conversion module.

[0017] The second programmable power conversion module is also used to collect the second voltage, the second current, and the second temperature of the second programmable power conversion module output by the second programmable power conversion module.

[0018] The control module is also used to read the first voltage, the first current, the first temperature, the second voltage, the second current, and the second temperature.

[0019] Optionally, the system also includes multiple overvoltage indicator lights corresponding one-to-one with the multiple sets of DC power supplies;

[0020] The interface unit is also used to receive multiple sets of output voltage protection parameters sent by the host computer that correspond one-to-one with the multiple sets of DC power supplies;

[0021] The control module is further configured to determine whether the voltage value of the first voltage of the first programmable power conversion module or the voltage value of the second voltage of the second programmable power conversion module in the DC power supply is greater than or equal to the output voltage protection parameter. If so, the first programmable power conversion module and the second programmable power conversion module are turned off, and the corresponding overvoltage indicator light is illuminated.

[0022] Optionally, the system also includes multiple overcurrent indicator lights corresponding one-to-one with the multiple sets of DC power supplies;

[0023] The interface unit is also used to receive multiple sets of output current protection parameters sent by the host computer that correspond one-to-one with the multiple sets of DC power supplies;

[0024] The control module is further configured to determine whether the sum of the current value of the first current of the first programmable power conversion module and the current value of the second current of the second programmable power conversion module in the DC power supply is greater than or equal to the output current protection parameter. If so, the first programmable power conversion module and the second programmable power conversion module are turned off, and the corresponding overcurrent indicator lights are illuminated.

[0025] Optionally, the system also includes a plurality of first over-temperature indicator lights corresponding one-to-one with a plurality of first programmable power conversion modules in the plurality of DC power supplies, and a plurality of second over-temperature indicator lights corresponding one-to-one with a plurality of second programmable power conversion modules in the plurality of DC power supplies.

[0026] The first programmable power conversion module includes a first contact-sensitive temperature sensor;

[0027] The first contact-sensitive temperature sensor is used to determine whether the temperature value of the first temperature of the first programmable power conversion module is greater than or equal to the temperature value of the operating temperature of the first contact-sensitive temperature sensor. If so, the first programmable power conversion module is turned off, and a temperature status signal corresponding to the first temperature is sent to the control module, so that the control module lights up the first over-temperature indicator light. If not, the first programmable power conversion module is turned on, and a temperature status signal corresponding to the first temperature is sent to the control module, so that the control module turns off the first over-temperature indicator light.

[0028] The second programmable power conversion module includes a second contact-sensitive temperature sensor;

[0029] The second contact-sensitive temperature sensor is used to determine whether the temperature value of the second temperature of the second programmable power conversion module is greater than or equal to the operating temperature value of the second contact-sensitive temperature sensor. If so, the second programmable power conversion module is turned off, and a temperature status signal corresponding to the second temperature is sent to the control module, so that the control module illuminates the second over-temperature indicator light. If not, the second programmable power conversion module is turned on, and a temperature status signal corresponding to the second temperature is sent to the control module, so that the control module turns off the second over-temperature indicator light.

[0030] Optionally, the system also includes a plurality of first normal indicator lights corresponding one-to-one with a plurality of first programmable power conversion modules in the plurality of DC power supplies, and a plurality of second normal indicator lights corresponding one-to-one with a plurality of second programmable power conversion modules in the plurality of DC power supplies.

[0031] The controller is also used to determine whether the voltage value of the first voltage output by the first programmable power conversion module is within the range of output DC voltage. If it is, the first normal indicator light is turned on; if not, the first normal indicator light is turned off.

[0032] The controller is also used to determine whether the voltage value of the second voltage output by the second programmable power conversion module is within the range of the output DC voltage. If it is, the second normal indicator light is turned on; if not, the second normal indicator light is turned off.

[0033] Optionally, the system further includes a plurality of first digital tubes corresponding one-to-one with the plurality of DC power supplies and a plurality of second digital tubes corresponding one-to-one with the plurality of DC power supplies;

[0034] The control module is also used to send the multiple DC voltages output by the multiple DC power supplies to the multiple first digital tubes, so that the multiple first digital tubes display the voltage values ​​of the multiple DC voltages;

[0035] The control module is further configured to send multiple currents corresponding to the multiple DC voltages output by the multiple DC power supplies to the multiple second digital tubes, so that the multiple second digital tubes display the current values ​​of the multiple currents.

[0036] Optionally, the secondary power supply circuit is also used to supply power to multiple overvoltage indicator lights, multiple overcurrent indicator lights, multiple first overtemperature indicator lights, multiple second overtemperature indicator lights, multiple first normal indicator lights, multiple second normal indicator lights, multiple first digital tubes, and multiple second digital tubes.

[0037] The beneficial effects of this invention are as follows:

[0038] The technical solution described in this invention is applicable to the field of multi-channel isolated output DC power supply systems that require good human-machine interaction of the power supply itself, flexible configuration of power supply output parameters, and high requirements for low cost, high reliability and strong environmental adaptability. Attached Figure Description

[0039] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0040] Figure 1 A schematic diagram of a DC power supply system provided in an embodiment of the present invention is shown.

[0041] Figure 2 A schematic diagram of a DC power supply system provided in another embodiment of the present invention is shown.

[0042] Figure 3 A flowchart of the control module of the DC power supply system provided in an embodiment of the present invention is shown.

[0043] Figure 4 This diagram illustrates the analog-to-digital sampling filter circuit of a DC power supply system provided in an embodiment of the present invention.

[0044] Figure 5 This diagram illustrates a driving display circuit for a digital tube in a DC power supply system provided in an embodiment of the present invention. Detailed Implementation

[0045] To more clearly illustrate the present invention, the following description, in conjunction with embodiments and accompanying drawings, further explains the invention. Similar components in the drawings are indicated by the same reference numerals. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of the present invention.

[0046] Existing DC power supplies cannot achieve good human-machine interaction in limited spaces, and the power output parameters cannot be flexibly configured. They are also not suitable for DC power supply applications with high requirements in terms of cost control, reliability, and environmental adaptability.

[0047] In view of this, one embodiment of the present invention provides a DC power supply system, the system including a control module, multiple isolated DC power supplies, and multiple voltage-adjusting potentiometers corresponding one-to-one with the multiple DC power supplies; wherein, each DC power supply includes a first programmable power conversion module and a second programmable power conversion module connected in parallel, the control module includes an interface unit, and the control module and the multiple DC power supplies are powered by an external power supply; the interface unit is used to receive multiple sets of output DC voltage range parameters corresponding one-to-one with the multiple DC power supplies and multiple power-on / off commands sent by a host computer; the multiple voltage-adjusting potentiometers are used to adjust the multiple sets of DC voltage values ​​output by the multiple DC power supplies and generate multiple voltage-adjusting potentiometer signals; the control module is used to generate multiple power-on / off signals according to the multiple power-on / off commands, and is also used to generate multiple control signals corresponding one-to-one with the multiple DC power supplies according to the multiple sets of output DC voltage range parameters and the read multiple voltage-adjusting potentiometer signals; the multiple DC power supplies are used to power on according to the multiple power-on / off signals, and output multiple sets of DC voltages according to the power supply signal from the external power supply and the multiple control signals.

[0048] In a specific example, such as Figure 1 As shown, the system includes an intelligent DC power supply system 10, a host computer 20, and an external DC power supply 30. The intelligent DC power supply system 10 includes a core control module 101, a CAN bus interface 102, a voltage regulating potentiometer 103, an indicator light 104, a digital tube control and display module 105, a programmable power conversion module 1061, a programmable power conversion module 1062, ..., a programmable power conversion module 1062n-1, and a programmable power conversion module 1062n. The core control module 101 includes a DSP minimum system 1011, an AD sampling and filtering circuit 1012, a CAN communication isolation drive circuit 1013, an RS485 isolation drive circuit 1014, an RS422 isolation drive circuit 1015, and a secondary power supply circuit 1016.

[0049] In a specific example, such as Figure 2 The microcontroller-based intelligent DC power supply monitoring, control and display system shown consists of a DSP-based core control module, several general-purpose programmable power conversion modules with communication interfaces, a digital tube display and control module, indicator lights, voltage regulating potentiometers and external communication interfaces.

[0050] In a specific example, such as Figure 3 As shown, the core control module uses a DSP processor to complete CAN communication with the host computer, RS485 communication with the programmable power conversion module, RS422 communication with the digital tube display and control module, control the display status of the indicator lights, acquire AD signals from the voltage regulator potentiometer, and record and store power output data.

[0051] In a specific example, after receiving the power-on / off command from the host computer via the CAN communication interface, the core control module then controls the power-on / off of the corresponding programmable power conversion module via RS485 serial bus communication with the programmable power conversion module.

[0052] In a specific example, the core control module receives the output voltage range parameters of each group of power supplies sent by the host computer through the CAN communication interface, and then combines the voltage adjustment potentiometer signal acquired by the AD converter to set the output voltage value of the programmable power conversion module through RS485 serial bus communication with the programmable power conversion module.

[0053] In a specific example, the core control module uses a 28335 DSP processor. The 28335 DSP processor has a 16-channel 12-bit analog-to-digital converter, two Controller Area Network (CAN) modules, three SCI (UART) modules, one SPI module, and 88 individually programmable multiplexed general-purpose input / output (GPIO) pins with input filtering function. It is equipped with a crystal oscillator and capacitors to form the minimum DSP system.

[0054] In a specific example, the DC power supply system uses a dual-redundant CAN bus for external communication. The two CAN bus controllers integrated by the 28335 DSP processor in the core control module form a standard CAN bus signal through an isolated power supply, optocoupler, and CAN bus transceiver, and are isolated from the power supply of the CAN bus controller.

[0055] In a specific example, the core control module communicates with each programmable power conversion module via an RS485 serial bus. Each programmable power conversion module has an RS485 communication interface. The core control module is the master device, and each programmable power conversion module is a slave device, identified by its external hardware address code. A serial communication interface (SCI) (UART) module within the 28335 DSP processor of the core control module acts as the bus controller for RS485 communication. Through isolated power supplies, optocouplers, and an RS485 bus transceiver, TTL logic signals are converted into high-speed, high-drive-capability differential signals. Tri-state output can be achieved through the enable control terminal of the RS485 bus transceiver.

[0056] In a specific example, the host computer and the DC power supply system exchange commands and information via the CAN bus according to a software communication protocol.

[0057] In a specific example, the host computer sends power on / off commands for the programmable power converter module to the DC power supply system via the CAN bus. The core control module in the DC power supply system receives the commands via a software interrupt and then forwards them to the corresponding programmable power converter module via RS485 serial bus communication.

[0058] In a specific example, the host computer sends parameters such as the output voltage range, overvoltage protection point, and overcurrent protection point of each power supply group to the DC power supply system via the CAN bus. These parameters are stored in the storage unit of the core control module. If no settings are required, the initial parameters in the DC power supply system are used.

[0059] This embodiment employs an integrated monitoring, control, and display system within the DC power supply. This enables the DC power supply to have a BIT self-test function, allowing it to monitor its own status in real time and provide timely protection in case of faults. It can receive parameter setting commands from the host computer via an external communication bus, adjusting parameters such as the output voltage range, overvoltage protection point, and overcurrent protection point of each isolated output power supply group, thus improving the flexibility of the DC power supply system application. It also enables the DC power supply to achieve good human-machine interaction within a limited space. The combination of digital tube display, control module, and indicator lights to display the power supply output status in real time reduces manufacturing costs and improves the reliability and environmental adaptability of the DC power supply system.

[0060] In one possible implementation, the control module includes an analog-to-digital sampling filter circuit, a controller, and a secondary power supply circuit; the analog-to-digital sampling filter circuit is used to acquire the signals of the plurality of voltage regulating potentiometers and convert them into corresponding digital signals to be sent to the controller; the secondary power supply circuit is used to receive the power supply signal and supply power to the analog-to-digital sampling filter circuit and the controller.

[0061] In a specific example, the core control module of the DC power supply system receives the output voltage range parameters of each power supply group from the host computer, and then, combined with the voltage adjustment potentiometer signals acquired by the AD converter, sets the output voltage value of the programmable power converter module in each power supply group. The core control module sends the output voltage value to the programmable power converter module via an RS485 serial bus. Each power supply output corresponds to a voltage adjustment potentiometer, and the voltage adjustment functions of each power supply output are independent. The core control module acquires the voltage adjustment potentiometer signals through the AD converter, and the 12-bit analog-to-digital converter integrated in the 28335 DSP processor within the core control module implements the sampling and filtering circuit. A single-channel AD sampling and filtering circuit is shown below. Figure 4 As shown.

[0062] In one possible implementation, each DC power supply group includes a first programmable power conversion module and a second programmable power conversion module connected in parallel; each DC power supply group is used to determine whether the voltage value of the first voltage is greater than or equal to the voltage value of the second voltage when the first programmable power conversion module outputs a first voltage and the second programmable power conversion module outputs a second voltage. If yes, the first voltage is output; otherwise, the second voltage is output.

[0063] In a specific example, every two programmable power converter modules are combined into a DC power supply output group, with the two programmable power converter modules within each group serving as redundant hot backups. The outputs of the two programmable power converter modules within a DC power supply group can be connected in parallel for current sharing. When both programmable power converter modules are outputting simultaneously, the output voltage of the programmable power converter module with the higher output voltage becomes the output voltage of that DC power supply group. When one programmable power converter module in a DC power supply group has no output, it does not affect the output of the other programmable power converter module. The outputs of each DC power supply group are mutually isolated; if one DC power supply group experiences overvoltage or overcurrent and shuts down its output, the other DC power supply groups can continue to operate.

[0064] In one possible implementation, the first programmable power conversion module is further configured to acquire a first voltage, a first current, and a first temperature output by the first programmable power conversion module; the second programmable power conversion module is further configured to acquire a second voltage, a second current, and a second temperature output by the second programmable power conversion module; and the control module is further configured to read the first voltage, the first current, the first temperature, the second voltage, the second current, and the second temperature.

[0065] In a specific example, the programmable power conversion module has the function of real-time acquisition of its own output voltage value, output current value and temperature status. The core control module reads the actual output voltage value, output current value and temperature status of each programmable power conversion module at regular intervals through the RS485 serial bus.

[0066] In a specific example, the core control module periodically reads the actual output voltage, output current, and temperature status of each programmable power conversion module via the RS485 serial bus, stores the data in the storage unit, and can subsequently upload it according to CAN bus commands.

[0067] In existing technologies, the monitoring and display system of DC power supply is often separate from the DC power supply itself. The monitoring and display system is located outside the DC power supply, and a lot of cables are needed to connect the DC power supply and the monitoring and display system, making the DC power supply system complex and requiring a large space.

[0068] This embodiment uses a combination of hardware and software to enable the DC power supply to have a BIT self-test function. The DC power supply can monitor its own status in real time, and quickly shut down the power output of the faulty circuit in the event of a fault. It can be used in an unattended state. At the same time, this invention integrates the monitoring, control and display modules into the DC power supply, saving a lot of space.

[0069] In existing technologies, DC power supplies with multiple isolated outputs are difficult to change once their internal parameters, such as output voltage range, overvoltage protection point, and overcurrent protection point, are set. Changing these parameters often requires hardware modifications.

[0070] In one possible implementation, the system further includes multiple overvoltage indicator lights corresponding one-to-one with the multiple sets of DC power supplies; the interface unit is also used to receive multiple sets of output voltage protection parameters corresponding one-to-one with the multiple sets of DC power supplies sent by the host computer; the control module is also used to determine whether the voltage value of the first voltage of the first programmable power conversion module or the voltage value of the second voltage of the second programmable power conversion module in the DC power supply is greater than or equal to the output voltage protection parameters, and if so, then the first programmable power conversion module and the second programmable power conversion module are turned off, and the corresponding overvoltage indicator lights are lit.

[0071] In a specific example, the core control module receives power output protection parameters from the host computer via the CAN communication interface. Once a programmable power converter module in a power supply group outputs overvoltage, the core control module sends a shutdown signal to both programmable power converter modules in that power supply group via the RS485 serial bus, and simultaneously illuminates the corresponding overvoltage indicator light for that power supply group.

[0072] In a specific example, once a programmable power conversion module in a power supply group experiences an overvoltage, the core control module sends a shutdown signal to the two programmable power conversion modules in that power supply group via the RS485 serial bus. At the same time, the corresponding overvoltage indicator light for that power supply group is illuminated after conditioning via the DSP's GPIO.

[0073] In one possible implementation, the system further includes multiple overcurrent indicator lights corresponding one-to-one with the multiple sets of DC power supplies; the interface unit is also used to receive multiple sets of output current protection parameters corresponding one-to-one with the multiple sets of DC power supplies sent by the host computer; the control module is also used to determine whether the sum of the current value of the first current of the first programmable power conversion module and the current value of the second current of the second programmable power conversion module in the DC power supply is greater than or equal to the output current protection parameters, and if so, then the first programmable power conversion module and the second programmable power conversion module are turned off, and the corresponding overcurrent indicator lights are lit.

[0074] In a specific example, the core control module receives overcurrent protection points for each power supply output from the host computer via the CAN communication interface. After adding the output current values ​​of the two programmable power conversion modules in each power supply group, it determines whether the output current of each power supply group is overcurrent. Once an output current of a power supply group is overcurrent, the core control module sends a shutdown signal to the two programmable power conversion modules of that power supply group via the RS485 serial bus, and simultaneously illuminates the corresponding output overcurrent indicator light for that power supply group.

[0075] In a specific example, the core control module adds the output current values ​​of the two programmable power conversion modules in each group and then determines whether the output current of each power supply group is overcurrent. Once an output current of a power supply group is overcurrent, the core control module sends a shutdown signal to the two programmable power conversion modules of that power supply group via the RS485 serial bus, and simultaneously illuminates the corresponding output overcurrent indicator light of that power supply group after conditioning via the DSP's GPIO.

[0076] In one possible implementation, the system further includes multiple first over-temperature indicator lights corresponding one-to-one with multiple first programmable power conversion modules in the multiple sets of DC power supplies, and multiple second over-temperature indicator lights corresponding one-to-one with multiple second programmable power conversion modules in the multiple sets of DC power supplies; the first programmable power conversion module includes a first contact-sensitive temperature sensor; the first contact-sensitive temperature sensor is used to determine whether the temperature value of the first temperature of the first programmable power conversion module is greater than or equal to the temperature value of the operating temperature of the first contact-sensitive temperature sensor; if so, the first programmable power conversion module is turned off, and a temperature status signal corresponding to the first temperature is sent to the control module, so that the control module illuminates the first over-temperature indicator light; if not, the first programmable power conversion module is turned on. The second programmable power conversion module includes a second contact-sensitive temperature sensor. The second contact-sensitive temperature sensor is used to determine whether the temperature value of the second temperature of the second programmable power conversion module is greater than or equal to the operating temperature value of the second contact-sensitive temperature sensor. If so, the second programmable power conversion module is turned off, and a temperature status signal corresponding to the second temperature is sent to the control module, causing the control module to illuminate the second over-temperature indicator light. If not, the second programmable power conversion module is turned on, and a temperature status signal corresponding to the second temperature is sent to the control module, causing the control module to extinguish the second over-temperature indicator light.

[0077] In a specific example, the programmable power converter module incorporates a contact-sensitive temperature relay. When the temperature of a programmable power converter module reaches the relay's activation temperature, the module automatically shuts off its output and sends the temperature status to the core control module via an RS485 serial bus. The core control module then illuminates the corresponding over-temperature indicator light for that module. Once the temperature returns to normal, the module automatically resumes output and sends the temperature status back to the core control module via the RS485 serial bus. The core control module then extinguishes the corresponding over-temperature indicator light.

[0078] In a specific example, the programmable power converter module incorporates a contact-sensitive temperature relay. When the temperature of the programmable power converter module reaches the relay's activation temperature, the module automatically shuts off its output and sends the temperature status to the core control module via an RS485 serial bus. The core control module, after conditioning via the DSP's GPIO, illuminates the corresponding over-temperature indicator light for the programmable power converter module. When the temperature drops, the programmable power converter module automatically resumes its output, sending the temperature status back to the core control module via the RS485 serial bus. The core control module, after conditioning via the DSP's GPIO, extinguishes the corresponding over-temperature indicator light for the programmable power converter module.

[0079] This embodiment allows the DC power supply system to receive parameter setting instructions from the host computer via an external communication bus, and adjust parameters such as the output voltage range, overvoltage protection point, and overcurrent protection point of each isolated output power supply group, thereby improving the flexibility of the DC power supply system application.

[0080] In one possible implementation, the system further includes a plurality of first normal indicator lights corresponding one-to-one with a plurality of first programmable power conversion modules in the plurality of DC power supplies, and a plurality of second normal indicator lights corresponding one-to-one with a plurality of second programmable power conversion modules in the plurality of DC power supplies; the controller is further configured to determine whether the voltage value of the first voltage output by the first programmable power conversion module is within the output DC voltage range, and if so, to illuminate the first normal indicator light, and if not, to extinguish the first normal indicator light; the controller is further configured to determine whether the voltage value of the second voltage output by the second programmable power conversion module is within the output DC voltage range, and if so, to illuminate the second normal indicator light, and if not, to extinguish the second normal indicator light.

[0081] In a specific example, if the core control module reads the output voltage of the programmable power converter module via the RS485 serial bus and finds it to be within the normal range, then the corresponding normal indicator light for that programmable power converter module will light up; otherwise, the corresponding normal indicator light for that programmable power converter module will turn off.

[0082] In a specific example, when the core control module reads the output voltage of the programmable power conversion module through the RS485 serial bus and finds it to be within the normal range, it will light up the corresponding normal indicator light of the programmable power conversion module after conditioning via the DSP's GPIO; otherwise, it will turn off the corresponding normal indicator light of the programmable power conversion module.

[0083] Existing technologies often use displays to monitor and display the status of multi-channel isolated output DC power supplies. However, displays are more expensive and less reliable and adaptable to different environments than digital tubes and indicator lights.

[0084] In one possible implementation, the system further includes a plurality of first digital tubes corresponding one-to-one with the plurality of DC power supplies and a plurality of second digital tubes corresponding one-to-one with the plurality of DC power supplies; the control module is further configured to send the plurality of DC voltages output by the plurality of DC power supplies to the plurality of first digital tubes, so that the plurality of first digital tubes display the voltage values ​​of the plurality of DC voltages; the control module is further configured to send the plurality of currents corresponding to the plurality of DC voltages output by the plurality of DC power supplies to the plurality of second digital tubes, so that the plurality of second digital tubes display the current values ​​of the plurality of currents.

[0085] In a specific example, the core control module sends the output voltage and current values ​​of each group of DC power supplies to the digital tube display and control module via an RS422 serial bus for display. The digital tube display and control module is a system that can drive the digital tube display using only a microcontroller and a Darlington transistor array, updating the content to be displayed on the digital tube through the serial port of the microcontroller.

[0086] In a specific example, the core control module communicates with the digital tube display and control module via an RS422 serial bus. A serial communication interface (SCI) (UART) module within the 28335 DSP processor of the core control module acts as the bus controller for RS422 communication, converting TTL logic signals into high-speed, high-drive-capability differential signals through isolated power supplies, optocouplers, and RS422 bus transceivers.

[0087] In a specific example, the core control module sends the output voltage and current values ​​of each group of DC power supplies to the digital tube display and control module for display via an RS422 serial bus.

[0088] In a specific example, the digital tube display and control module is a system that can drive the digital tube display using only a microcontroller and a Darlington transistor array. The content to be displayed on the digital tube is received via the RS422 serial port on the microcontroller. The digital tubes used are BSR4303C type 3-digit 8-segment common cathode digital tubes. The voltage and current values ​​of each power supply group are displayed using a separate BSR4303C type digital tube. The total number of BSR4303C type digital tubes is set according to the number of isolated output power supply groups.

[0089] In a specific example, the digital tube display and control module uses an 8-bit microcontroller L89C51 as the processor, with peripheral components such as a crystal oscillator and capacitors forming a minimum microcontroller system. The L89C51 microcontroller runs a program that controls the Darlington transistor array LT2003A by setting the I / O pin output values, thereby driving the digital tube for scanning and display. The LT2003A consists of 7 NPN Darlington transistors; two BSR4303C type digital tubes require a total of 8 segment selections and 6 digit selections, therefore two LT2003A chips are needed. The microcontroller-based digital tube driving display circuit is as follows: Figure 5 As shown, Figure 5 In the diagram, a is the circuit diagram of the digital tube; b is the circuit diagram of the LT2003A; c is the circuit diagram of another LT2003A; and d is the circuit diagram of the microcontroller. The IF of the digital tube is 10mA / segment, and the current-limiting resistor is designed according to the driving current parameters of the digital tube. The maximum collector current of the LT2003A can reach 500mA per channel, and the maximum actual operating current is 80mA, which meets the requirements.

[0090] This embodiment reduces costs by using a combination of digital tube display and control modules with indicator lights, while improving the reliability and environmental adaptability of the power supply. Each power output is equipped with an overvoltage status indicator and an overcurrent status indicator, and each programmable power conversion module is equipped with a normal status indicator and an overtemperature indicator. The output voltage and output current values ​​of each power supply are displayed through corresponding digital tubes.

[0091] In one possible implementation, the secondary power supply circuit is also used to supply power to multiple overvoltage indicator lights, multiple overcurrent indicator lights, multiple first overtemperature indicator lights, multiple second overtemperature indicator lights, multiple first normal indicator lights, multiple second normal indicator lights, multiple first digital tubes, and multiple second digital tubes.

[0092] This embodiment provides an intelligent DC power supply system with multiple isolated outputs, each supplying power to a different load. The system integrates a microcontroller-based monitoring, control, and display system, offering excellent human-machine interaction. It receives parameter setting commands from a host computer via an external communication bus, adjusting parameters such as the output voltage range, overvoltage protection point, and overcurrent protection point of each isolated output power supply. This significantly enhances the flexibility of the DC power supply system, achieving intelligent and miniaturized operation. The combination of a digital tube display and control module with indicator lights to display the power output status in real time reduces manufacturing costs and improves the reliability and environmental adaptability of the DC power supply system. The digital tube display and control module, which uses a microcontroller to control a Darlington transistor array to drive the digital tube display, features simple circuit principles, fewer component types, simple programming concepts, ease of implementation, and convenient expansion or customization. It is particularly suitable for fields requiring serial communication control of the digital tube display content.

[0093] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0094] It should also be noted that in the description of this invention, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0095] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other different forms of transformation or modification can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious transformations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A DC power supply system, characterized in that, The system includes a control module, multiple isolated DC power supplies, and multiple voltage regulating potentiometers corresponding one-to-one with the multiple DC power supplies; wherein, each DC power supply includes a first programmable power conversion module and a second programmable power conversion module connected in parallel, the control module includes an interface unit, and the control module and the multiple DC power supplies are powered by an external power source; The interface unit is used to receive multiple sets of output DC voltage range parameters and multiple power on / off commands sent by the host computer, which correspond one-to-one with the multiple sets of DC power supplies. The plurality of voltage-adjusting potentiometers are used to adjust the plurality of DC voltage values ​​output by the plurality of DC power supplies and generate a plurality of voltage-adjusting potentiometer signals. The control module is used to generate multiple power-on / off signals according to the multiple power-on / off commands, and is also used to generate multiple control signals corresponding one-to-one with the multiple sets of DC power supplies according to the multiple sets of output DC voltage range parameters and the multiple voltage regulating potentiometer signals read. The multiple sets of DC power supplies are used to power on the device according to the multiple power-on / off signals, and to output multiple sets of DC voltages according to the power supply signal from the external power supply and the multiple control signals.

2. The DC power supply system according to claim 1, characterized in that, The control module includes an analog-to-digital sampling filter circuit, a controller, and a secondary power supply circuit; The analog-to-digital sampling and filtering circuit is used to collect the signals from the multiple voltage regulators and convert them into corresponding digital signals to be sent to the controller. The secondary power supply circuit is used to receive the power signal and supply power to the analog-to-digital sampling filter circuit and the controller.

3. The DC power supply system according to claim 2, characterized in that, Each DC power supply is used to determine whether the voltage value of the first voltage is greater than or equal to the voltage value of the second voltage when the first programmable power conversion module outputs the first voltage and the second programmable power conversion module outputs the second voltage. If yes, the first voltage is output; otherwise, the second voltage is output.

4. The DC power supply system according to claim 3, characterized in that, The first programmable power conversion module is also used to collect the first voltage, the first current and the first temperature of the first programmable power conversion module output by the first programmable power conversion module. The second programmable power conversion module is also used to collect the second voltage, the second current, and the second temperature of the second programmable power conversion module output by the second programmable power conversion module. The control module is also used to read the first voltage, the first current, the first temperature, the second voltage, the second current, and the second temperature.

5. The DC power supply system according to claim 4, characterized in that, The system also includes multiple overvoltage indicator lights, each corresponding to one of the multiple DC power supplies; The interface unit is also used to receive multiple sets of output voltage protection parameters sent by the host computer that correspond one-to-one with the multiple sets of DC power supplies; The control module is further configured to determine whether the voltage value of the first voltage of the first programmable power conversion module or the voltage value of the second voltage of the second programmable power conversion module in the DC power supply is greater than or equal to the output voltage protection parameter. If so, the first programmable power conversion module and the second programmable power conversion module are turned off, and the corresponding overvoltage indicator light is illuminated.

6. The DC power supply system according to claim 5, characterized in that, The system also includes multiple overcurrent indicator lights that correspond one-to-one with the multiple sets of DC power supplies; The interface unit is also used to receive multiple sets of output current protection parameters sent by the host computer that correspond one-to-one with the multiple sets of DC power supplies; The control module is further configured to determine whether the sum of the current value of the first current of the first programmable power conversion module and the current value of the second current of the second programmable power conversion module in the DC power supply is greater than or equal to the output current protection parameter. If so, the first programmable power conversion module and the second programmable power conversion module are turned off, and the corresponding overcurrent indicator lights are illuminated.

7. The DC power supply system according to claim 6, characterized in that, The system also includes multiple first over-temperature indicator lights corresponding to multiple first programmable power conversion modules in the multiple sets of DC power supplies, and multiple second over-temperature indicator lights corresponding to multiple second programmable power conversion modules in the multiple sets of DC power supplies. The first programmable power conversion module includes a first contact-sensitive temperature sensor; The first contact-sensitive temperature sensor is used to determine whether the temperature value of the first temperature of the first programmable power conversion module is greater than or equal to the temperature value of the operating temperature of the first contact-sensitive temperature sensor. If so, the first programmable power conversion module is turned off, and a temperature status signal corresponding to the first temperature is sent to the control module, so that the control module lights up the first over-temperature indicator light. If not, the first programmable power conversion module is turned on, and a temperature status signal corresponding to the first temperature is sent to the control module, so that the control module turns off the first over-temperature indicator light. The second programmable power conversion module includes a second contact-sensitive temperature sensor; The second contact-sensitive temperature sensor is used to determine whether the temperature value of the second temperature of the second programmable power conversion module is greater than or equal to the operating temperature value of the second contact-sensitive temperature sensor. If so, the second programmable power conversion module is turned off, and a temperature status signal corresponding to the second temperature is sent to the control module, so that the control module illuminates the second over-temperature indicator light. If not, the second programmable power conversion module is turned on, and a temperature status signal corresponding to the second temperature is sent to the control module, so that the control module turns off the second over-temperature indicator light.

8. The DC power supply system according to claim 7, characterized in that, The system also includes multiple first normal indicator lights corresponding to multiple first programmable power conversion modules in the multiple sets of DC power supplies, and multiple second normal indicator lights corresponding to multiple second programmable power conversion modules in the multiple sets of DC power supplies. The controller is also used to determine whether the voltage value of the first voltage output by the first programmable power conversion module is within the range of output DC voltage. If it is, the first normal indicator light is turned on; if not, the first normal indicator light is turned off. The controller is also used to determine whether the voltage value of the second voltage output by the second programmable power conversion module is within the range of the output DC voltage. If it is, the second normal indicator light is turned on; if not, the second normal indicator light is turned off.

9. The DC power supply system according to claim 8, characterized in that, The system also includes multiple first digital tubes corresponding to the multiple sets of DC power supplies and multiple second digital tubes corresponding to the multiple sets of DC power supplies; The control module is also used to send the multiple DC voltages output by the multiple DC power supplies to the multiple first digital tubes, so that the multiple first digital tubes display the voltage values ​​of the multiple DC voltages; The control module is further configured to send multiple currents corresponding to the multiple DC voltages output by the multiple DC power supplies to the multiple second digital tubes, so that the multiple second digital tubes display the current values ​​of the multiple currents.

10. The DC power supply system according to claim 9, characterized in that, The secondary power supply circuit is also used to supply power to multiple overvoltage indicator lights, multiple overcurrent indicator lights, multiple first overtemperature indicator lights, multiple second overtemperature indicator lights, multiple first normal indicator lights, multiple second normal indicator lights, multiple first digital tubes, and multiple second digital tubes.

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