Dual-output relay switching circuit

Abstract

The invention discloses a dual-output relay switching circuit, and relates to the technical field of programmable power supply control. Comprising a first control circuit and a second control circuit, the first control circuit and the second control circuit are connected through a relay module, the relay module is electrically connected with a common output port, and the first control circuit and the second control circuit output DC signals of DC 30V / 10A. The maximum current of the first control circuit and the maximum voltage of the second control circuit are set to be 10A, and the maximum voltage of the first control circuit and the second control circuit is set to be 30V. According to the invention, the relay module is controlled through software, so that a user does not need to manually adjust a plurality of parameters or re-carry out physical wiring arrangement, thereby simplifying the process of multi-mode output configuration, reducing the risk of errors, and improving the working efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of programmable power supply control, in particular to a dual-output relay switching circuit. Background Art

[0002] In modern electronic and power systems, adjustable DC power supplies are widely used in experimental research, product development, production line testing and many other occasions. Traditional DC power supplies usually can only provide a fixed voltage or current output range. For application scenarios that require greater flexibility, such as when different voltage and current combinations are required, users often have to purchase multiple power supply devices with different specifications, which not only increases costs but also takes up more space. In addition, when the power supply parameters need to be changed during experiments or production, the process of replacing equipment is complicated and time-consuming.

[0003] The Chinese invention patent with publication number CN116979673A discloses a dual AC voltage switching relay circuit and a switching method, including a main power supply, a backup power supply, a voltage switching circuit, a voltage detection circuit, an expansion circuit and a magnetic latching relay; the voltage switching circuit includes a first relay and a second relay and both are conversion relays, the moving contact of the first relay is normally closed at the live wire end of the backup power supply and normally open at the live wire end of the main power supply, the moving contact of the second relay is normally closed at the neutral wire end of the backup power supply and normally open at the neutral wire end of the main power supply; the voltage detection circuit is connected to the output end of the voltage switching circuit, and the output end of the voltage detection circuit is connected to a circuit formed by connecting a magnetic latching relay and an expansion circuit in parallel; the normally closed contact of the magnetic latching relay is connected in series between the output end of the first relay and the voltage detection circuit; the expansion circuit includes a third relay, and the output ends of the first relay and the second relay are the live wire end and the neutral wire end of the switched power supply, respectively.

[0004] When the above-mentioned and similar relay circuits are used for multi-mode output, users must manually adjust multiple parameters and rearrange the physical wiring, which is not only time-consuming but also prone to misoperation and reduced work efficiency. At the same time, the complex physical connection and setting process also increases the difficulty of operation and the risk of errors. Summary of the invention

[0005] The object of the present invention is to provide a dual-output relay switching circuit to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dual-output relay switching circuit, comprising a first control circuit and a second control circuit, wherein the first control circuit and the second control circuit are connected via a relay module, and the relay module is electrically connected to a common output port, and the first control circuit and the second control circuit both output a DC 30V / 10A DC signal, and the maximum current of the first control circuit and the second control circuit is set to 10A, and the maximum voltage is set to 30V.

[0007] Furthermore, when the first control circuit and the second control circuit are connected in parallel via the relay module, the maximum reference pulse duty cycle of the voltage is 50%, and the maximum reference pulse duty cycle of the current is 100%; When the first control circuit and the second control circuit are connected in series via the relay module, the maximum reference pulse duty cycle of the voltage is 100%, and the maximum reference pulse duty cycle of the current is 50%.

[0008] Furthermore, when the first control circuit and the second control circuit are connected in parallel via a relay module, the maximum output voltage of the common output port is 30V, and the maximum output current is 20A; When the first control circuit and the second control circuit are connected in series via the relay module, the maximum output voltage of the common output port is 60V, and the maximum output current is 10A.

[0009] Furthermore, the first control circuit includes an MCU1 reference control chip, the MCU1 reference control chip is electrically connected to the relay module and the first output module, and the first output module is electrically connected to the first current sampler, the first voltage sampler, the relay module, the first output port and the common output port.

[0010] Furthermore, the first output module includes a first power management chip and a first power device controller, the first power management chip is electrically connected to the first power device controller, the first power device controller is electrically connected to a first current sampler, a first voltage sampler, a relay module and a resistor Rs1, and the first current sampler and the first voltage sampler are both electrically connected to the relay module, and the resistor Rs1 is electrically connected to the first output port and the common output port.

[0011] Furthermore, the second control circuit includes an MCU2 reference control chip, the MCU2 reference control chip is electrically connected to the second output module, and the second output module is electrically connected to the second current sampler, the second voltage sampler, the relay module, the second output port and the common output port.

[0012] Furthermore, the second output module includes a second power management chip and a second power device controller, the second power management chip is electrically connected to the second power device controller, the second power device controller is electrically connected to the second current sampler, the second voltage sampler, the relay module, the second output port, the common output port and the resistor Rs2, and the resistor Rs2 is electrically connected to the relay module.

[0013] Furthermore, the relay module includes RELAY1 relay, RELAY2 relay and RELAY3 relay, the RELAY1 relay is electrically connected to the MCU1 benchmark control chip, the first power device controller, the second power device controller, the first voltage sampler, the second voltage sampler, the first output port, the second output port and the common output port, the RELAY2 relay is electrically connected to the MCU1 benchmark control chip, the resistor Rs1, the resistor Rs2, the resistor Rs3, the first output port, the second output port and the third current sampler, and the RELAY3 relay is electrically connected to the MCU1 benchmark control chip, the first power device controller, the first current sampler, the resistor Rs1, the resistor Rs3, the third current sampler and the common output port.

[0014] Compared with the prior art, the present invention has the following beneficial effects: First, the present invention controls the relay module through software, so that the user does not need to manually adjust multiple parameters or re-arrange physical wiring, thereby simplifying the process of multi-mode output configuration, reducing the risk of errors, and improving work efficiency; Second: The present invention uses a relay module to adjust the output voltage and current in real time according to actual needs, and supports independent output, parallel and seemingly series working modes, so that the power supply equipment can adapt to more variable working conditions and provide a more flexible use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an independent output block diagram of the two-way control circuit of the present invention; Figure 2 It is a series-parallel output block diagram of the two-way control circuit of the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] When the existing relay circuit performs multi-mode output, the user must manually adjust multiple parameters and rearrange the physical connections, which is not only time-consuming, but also easy to cause misoperation and reduce work efficiency. At the same time, the complex physical connection and setting process also increases the difficulty of operation and the risk of error. The technical solution of the present application connects the first control circuit and the second control circuit that operate independently of each other through a relay module, so that they can work in series and parallel according to actual needs, so that the voltage and current can be adjusted in real time, and then they can adapt to changing working conditions and maintain a stable power supply.

[0018] refer to Figure 1 and Figure 2 , this embodiment provides a dual-output relay switching circuit, which includes a first control circuit and a second control circuit, wherein the first control circuit and the second control circuit are connected through a relay module, and the relay module is electrically connected to a common output port. In other words, the first control circuit and the second control circuit are connected in parallel or in series through the relay module. It is worth noting that the first control circuit and the second control circuit operate independently of each other, and both the first control circuit and the second control circuit output a DC 30V / 10A direct current signal, and at the same time, the current of the first control circuit and the second control circuit are set to 0-10A, and the voltage is set to 0-30V, that is, the current and voltage can be adjusted according to actual needs.

[0019] In this embodiment, the first control circuit includes an MCU1 reference control chip, the MCU1 reference control chip is electrically connected to the relay module and the first output module, the first output module is electrically connected to the first current sampler, the first voltage sampler, the relay module, the first output port and the common output port. Further, the first output module includes a first power management chip and a first power device controller, the first power management chip is electrically connected to the first power device controller, the first power device controller is electrically connected to the first current sampler, the first voltage sampler, the relay module and the resistor Rs1, and the first current sampler and the first voltage sampler are both electrically connected to the relay module, and the resistor Rs1 is electrically connected to the first output port and the common output port.

[0020] In this embodiment, the second control circuit includes an MCU2 reference control chip, the MCU2 reference control chip is electrically connected to the second output module, the second output module is electrically connected to the second current sampler, the second voltage sampler, the relay module, the second output port and the common output port. Further, the second output module includes a second power management chip and a second power device controller, the second power management chip is electrically connected to the second power device controller, the second power device controller is electrically connected to the second current sampler, the second voltage sampler, the relay module, the second output port, the common output port and the resistor Rs2, and the resistor Rs2 is electrically connected to the relay module.

[0021] In this embodiment, the relay module includes RELAY1 relay, RELAY2 relay and RELAY3 relay, RELAY1 relay is electrically connected to MCU1 benchmark control chip, first power device controller, second power device controller, first voltage sampler, second voltage sampler, first output port, second output port and common output port, RELAY2 relay is electrically connected to MCU1 benchmark control chip, resistor Rs1, resistor Rs2, resistor Rs3, first output port, second output port and third current sampler, RELAY3 relay is electrically connected to MCU1 benchmark control chip, first power device controller, first current sampler, resistor Rs1, resistor Rs3, third current sampler and common output port.

[0022] Specifically, the current sampler in this embodiment uses the INA219 current sampler, the voltage sampler uses the INA219 voltage sampler, the power management chip uses the LM2596 power management chip, the power device controller uses the IRF540N power device controller, the RELAY relay uses the G5LE-14-DC12 relay, and the MCU benchmark controller uses the STM32F103C8T6 MCU controller.

[0023] That is to say, in the specific operation process of the dual output relay switching circuit in this embodiment, the first control circuit, i.e., the first output port (such as CH1+ port and CH1- port) is controlled by the MCU1 reference control chip, and the second control circuit, i.e., the second output port (such as CH2+ port and CH2- port) is controlled by the MCU2 reference control chip.

[0024] In the specific operation process, when the first control circuit and the second control circuit are in independent output mode, the MCU1 reference control chip adjusts the voltage and current outputted from the first output port through reference control, and the MCU2 reference control chip adjusts the voltage and current outputted from the second output port through reference control. Specifically, in the first control circuit and the second control circuit, the power management chip provided therein is used for controlling the power device controller, and the power management chip adjusts the voltage and current outputted from the output port through the power device controller, and at the same time, the current sampler and the voltage sampler provided therein are used for monitoring the voltage and current outputted from the output port, and are fed back to the MCU reference control chip, so as to adjust the voltage and current outputted from the output port. It is worth noting that the RELAY1 relay is used to control the output of the first output port, the RELAY2 relay is used to control the output of the second output port, and the RELAY3 relay is used to control the switching between the output of the first control circuit and the output of the second control circuit.

[0025] Furthermore, when the RELAY1 relay and the RELAY2 relay are closed at the same time, the first control circuit and the second control circuit are in a parallel state. At this time, the maximum reference pulse duty cycle of the voltage is 50%, and the maximum reference pulse duty cycle of the current is 100%. At the same time, the maximum output voltage of the common output port is 30V, and the maximum output current is 20A.

[0026] Furthermore, when the RELAY3 relay is closed, the first control circuit and the second control circuit are in a series state. At this time, the maximum reference pulse duty cycle of the voltage is 100%, the maximum reference pulse duty cycle of the current is 50%, and the maximum output voltage of the common output port is 60V, and the maximum output current is 10A.

[0027] Specifically, by adjusting the reference voltage, the voltage reference can be increased to twice the original voltage, so that the output voltage can be increased to twice the original output voltage, that is, the maximum output voltage can be 60 V. Similarly, by adjusting the reference current, the current reference voltage can be reduced to 0.5 times the original value, that is, the maximum output current is 10A.

[0028] That is to say, when the first control circuit and the second control circuit are in independent output state, the first output port and the second output port both output a maximum output voltage of 30V and a maximum output current of 10A. When the first control circuit and the second control circuit are in parallel state, the maximum output voltage of the common output port is 30V and the maximum output current is 20A. When the first control circuit and the second control circuit are in series state, the maximum output voltage of the common output port is 60V and the maximum output current is 10A.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A dual output relay switching circuit, characterized in that: It includes a first control circuit and a second control circuit, which are connected via a relay module, and the relay module is electrically connected to a common output port. At the same time, the first control circuit and the second control circuit both output DC 30V / 10A direct current signals, and the maximum current of the first control circuit and the second control circuit is set to 10A, and the maximum voltage is set to 30V.

2. A dual output relay switching circuit according to claim 1, characterized in that: When the first control circuit and the second control circuit are connected in parallel via the relay module, the maximum reference pulse duty cycle of the voltage is 50%, and the maximum reference pulse duty cycle of the current is 100%; When the first control circuit and the second control circuit are connected in series via the relay module, the maximum reference pulse duty cycle of the voltage is 100%, and the maximum reference pulse duty cycle of the current is 50%.

3. A dual output relay switching circuit according to claim 1 or 2, characterized in that: When the first control circuit and the second control circuit are connected in parallel via the relay module, the maximum output voltage of the common output port is 30V, and the maximum output current is 20A; When the first control circuit and the second control circuit are connected in series via the relay module, the maximum output voltage of the common output port is 60V, and the maximum output current is 10A.

4. A dual output relay switching circuit according to claim 1, characterized in that: The first control circuit includes an MCU1 reference control chip, the MCU1 reference control chip is electrically connected to the relay module and the first output module, and the first output module is electrically connected to the first current sampler, the first voltage sampler, the relay module, the first output port and the common output port.

5. A dual output relay switching circuit according to claim 4, characterized in that: The first output module includes a first power management chip and a first power device controller, the first power management chip is electrically connected to the first power device controller, the first power device controller is electrically connected to a first current sampler, a first voltage sampler, a relay module and a resistor Rs1, and the first current sampler and the first voltage sampler are both electrically connected to the relay module, and the resistor Rs1 is electrically connected to the first output port and the common output port.

6. A dual output relay switching circuit according to claim 1, characterized in that: The second control circuit includes an MCU2 reference control chip, the MCU2 reference control chip is electrically connected to a second output module, and the second output module is electrically connected to a second current sampler, a second voltage sampler, a relay module, a second output port and a common output port.

7. A dual output relay switching circuit according to claim 6, characterized in that: The second output module includes a second power management chip and a second power device controller, the second power management chip is electrically connected to the second power device controller, the second power device controller is electrically connected to a second current sampler, a second voltage sampler, a relay module, a second output port, a common output port and a resistor Rs2, and the resistor Rs2 is electrically connected to the relay module.

8. A dual output relay switching circuit according to claim 3, characterized in that: The relay module includes RELAY1 relay, RELAY2 relay and RELAY3 relay. The RELAY1 relay is electrically connected to the MCU1 benchmark control chip, the first power device controller, the second power device controller, the first voltage sampler, the second voltage sampler, the first output port, the second output port and the common output port. The RELAY2 relay is electrically connected to the MCU1 benchmark control chip, the resistor Rs1, the resistor Rs2, the resistor Rs3, the first output port, the second output port and the third current sampler. The RELAY3 relay is electrically connected to the MCU1 benchmark control chip, the first power device controller, the first current sampler, the resistor Rs1, the resistor Rs3, the third current sampler and the common output port.

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