Program control device of direct-current power supply

Abstract

The utility model discloses a program control device of a direct-current power supply. The program control device comprises an upper computer, a 485 converter and a program control power supply, the upper computer is in communication conversion connection with the programmable power supply through the 485 converter, and a power supply control instruction sent by the upper computer can be converted by the 485 converter and then sent to the programmable power supply; and the programmable power supply is connected with the alternating-current mains supply, so that the programmable power supply can correspondingly convert the alternating-current mains supply to output 0-200V direct-current voltage according to the power supply control instruction converted and output by the 485 converter. Through the technical scheme of the utility model, direct current output in a voltage range of 0-200V is realized, the anti-interference capability and the control precision of large-voltage direct current signals are greatly improved, tedious manual operation is not needed, and misoperation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit control, and particularly relates to a program control device for a DC power supply. Background Art

[0002] At present, the program-controlled power supply uses a DC voltage signal of DC0-5V to control the DC output of DC0-200V, or manually adjusts the output parameters to perform DC output, so as to realize the program control on the DC power supply side.

[0003] In the current technical solution, the DC0-5V DC signal has poor anti-interference ability and low control accuracy, and the manual operation is cumbersome and prone to misoperation. Summary of the Utility Model

[0004] In view of the above problems, the utility model provides a program control device for a DC power supply. The voltage value given by the host computer is converted by a 485 converter and then sent to the program-controlled power supply. The program-controlled power supply converts the AC mains into the required output voltage within the range of 0-200V under the control of the power control instruction, so as to realize the DC output within the voltage range of 0-200V, greatly improving the anti-interference ability and control accuracy of the large-voltage DC signal, and there is no need for cumbersome manual operation, thus avoiding misoperation.

[0005] To achieve the above object, the utility model provides a program control device for a DC power supply, including: a host computer, a 485 converter and a program-controlled power supply;

[0006] The host computer is communicatively connected to the program-controlled power supply through the 485 converter, and the power control instruction sent by the host computer can be converted by the 485 converter and then sent to the program-controlled power supply;

[0007] The program-controlled power supply is connected to the AC mains, so that the program-controlled power supply can convert the AC mains into a DC voltage of 0-200V corresponding to the power control instruction converted and output by the 485 converter.

[0008] In the above technical solution, preferably, the program-controlled power supply includes an input filter, a switching power supply, an output filter, a control circuit and a DSP controller,

[0009] The input filter is connected to the AC mains, the switching power supply is connected to the input filter, the output filter is connected to the switching power supply, the control circuit is connected to the output filter, the input end of the DSP controller is connected to the host computer, and the output end is connected to the control circuit. The control circuit outputs a DC voltage signal with a corresponding voltage value according to the power control instruction received by the DSP controller.

[0010] In the above technical solution, preferably, the 485 converter adopts the RS485 communication method and the MODBUS RTU communication protocol.

[0011] In the above technical solution, preferably, the programmable power supply sends the output voltage output status, current output status, and alarm status to the host computer through the 485 converter via the MODBUS protocol.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The voltage value given by the host computer is converted by the 485 converter and then sent to the programmable power supply. Under the control of the power control instruction, the programmable power supply converts the AC mains into the required output voltage within the range of 0 - 200V, realizing the DC output within the range of 0 - 200V, greatly improving the anti-interference ability and control accuracy of the large-voltage DC signal, and there is no need for cumbersome manual operation, avoiding misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of a programmable control device for a DC power supply disclosed in an embodiment of the present utility model;

[0014] Figure 2 It is a schematic flow diagram of a programmable control device for a DC power supply disclosed in an embodiment of the present utility model.

[0015] In the figure, the corresponding relationship between each component and the reference numeral is as follows:

[0016] 1. Host computer, 2. 485 converter, 3. Programmable power supply, 31. Input filter, 32. Switching power supply, 33. Output filter, 34. Control circuit, 35. DSP controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] The present utility model will be further described in detail below with reference to the accompanying drawings:

[0019] As Figure 1 shown, a programmable control device for a DC power supply according to the present utility model includes: a host computer 1, a 485 converter 2, and a programmable power supply 3;

[0020] The host computer 1 is communicatively connected to the programmable power supply 3 through the 485 converter 2. The power control instructions sent by the host computer 1 can be converted by the 485 converter 2 and then sent to the programmable power supply 3.

[0021] The programmable power supply 3 is connected to the AC mains, so that the programmable power supply 3 can convert the AC mains into a DC voltage of 0 - 200V according to the power control instructions converted and output by the 485 converter 2.

[0022] In this embodiment, the voltage value given by the host computer 1 is converted by the 485 converter 2 and then sent to the programmable power supply 3. The programmable power supply 3 converts the AC mains into the required output voltage within the range of 0 - 200V under the control of the power control instructions, realizing the DC output within the voltage range of 0 - 200V, greatly improving the anti-interference ability and control accuracy of the high-voltage DC signal, and eliminating the need for cumbersome manual operations and avoiding misoperations.

[0023] Specifically, the USB interface of the host computer 1 is connected to the communication interface of the programmable power supply 3 through the 485 converter 2. The input interface of the programmable power supply 3 is connected to the AC mains with a voltage of 220V and a frequency of 50Hz. The programmable power supply 3 is used to convert the AC mains with a voltage of 220V and a frequency of 50Hz into a DC output with a specified voltage value within the voltage range of 0 - 200V.

[0024] As Figure 2 shown, in the above embodiment, preferably, the programmable power supply 3 includes an input filter 31, a switching power supply 32, an output filter 33, a control circuit 34, and a DSP controller 35.

[0025] The input filter 31 is connected to the AC mains, the switching power supply 32 is connected to the input filter 31, the output filter 33 is connected to the switching power supply 32, the control circuit 34 is connected to the output filter 33, the input end of the DSP controller 35 is connected to the host computer 1, and the output end is connected to the control circuit 34. The control circuit 34 outputs a DC voltage signal with a corresponding voltage value according to the power control instructions received by the DSP controller 35.

[0026] In this embodiment, the voltage input to the switching power supply 32 is filtered by the input filter 31, and the voltage output by the switching power supply 32 is filtered by the output filter 33. After the filtering process, the control circuit 34 can adjust the filtered voltage to obtain a voltage signal within the voltage range of 0 - 200V. The voltage value of the voltage signal obtained is determined by the power control instructions sent by the 485 converter 2 received by the DSP controller 35.

[0027] In the above embodiment, preferably, the 485 converter 2 adopts the RS485 communication method and the MODBUS RTU communication protocol.

[0028] In the above embodiment, preferably, the programmable power supply 3 sends the output voltage output state, current output state, and alarm state to the host computer 1 through the 485 converter 2 via the MODBUS protocol. The host computer 1 processes the input voltage value and the actual voltage output value, and can adjust the power control instruction, thereby reducing the deviation.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A program control device for a DC power supply, characterized in that: include: Host computer, 485 converter and programmable power supply; The host computer is connected to the program-controlled power supply through the 485 converter for communication conversion, and the power control instruction sent by the host computer can be converted by the 485 converter and then sent to the program-controlled power supply; The program-controlled power supply is connected to the AC mains, so that the program-controlled power supply can convert the AC mains into a DC voltage of 0-200V according to the power control instruction converted and output by the 485 converter.

2. The program control device of the DC power supply according to claim 1, characterized in that: The program-controlled power supply includes an input filter, a switching power supply, an output filter, a control circuit and a DSP controller. The input filter is connected to the AC mains, the switching power supply is connected to the input filter, the output filter is connected to the switching power supply, the control circuit is connected to the output filter, the input end of the DSP controller is connected to the host computer, and the output end is connected to the control circuit, and the control circuit outputs a DC voltage signal of a corresponding voltage value according to a power control instruction received by the DSP controller.

3. The program control device of the DC power supply according to claim 1, characterized in that: The 485 converter adopts RS485 communication mode and MODBUS RTU communication protocol.

4. The program control device of a DC power supply according to claim 1, characterized in that: The program-controlled power supply sends the output voltage output state, current output state and alarm state to the host computer through the MODBUS protocol and the 485 converter.

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