Remote switching circuit for shore power supply and battery power supply based on MOS (Metal Oxide Semiconductor) tube

Abstract

The utility model discloses an MOS tube-based shore power supply and battery power supply remote switching circuit, which belongs to the technical field of circuit switching and comprises an MOS tube U2, a battery switch P2, a first resistor R2, a second resistor R9, a single-pole double-throw switch K1, a ground terminal GND, a DC power supply module P1, a load anode 48V + and a load cathode 48V-. The 48V + is sequentially connected with the R2, the P2, the second port of the K1, the first port of the K1, the R9, the source electrode s of the U2, the drain electrode d of the U2 and the 48V-; a branch connected with a grid electrode g of the U2 is arranged between a port 1 of the K1 and the R9; and a branch is arranged between the R9 and the source s of the U2 and is connected with the GND. The circuit is small in size and convenient to integrate; the internal resistance is small, and the heating condition of the MOS tube is much smaller than that of a relay; the switching speed of the relay is dozens of milliseconds, and the switching speed of the MOS tube is nanosecond.

Description

Technical Field

[0001] The utility model discloses a shore-powered and battery-powered remote switching circuit based on a MOS tube, belonging to the technical field of circuit switching. Background Art

[0002] Underwater robots face unique challenges when performing tasks, especially in terms of power management. These challenges include long-term mission execution, the need for high reliability, and equipment protection in underwater environments. Therefore, the power switching system of underwater robots needs to be specially designed to ensure mission continuity and equipment safety. For the portability and continuous operation capability of underwater robot equipment, more and more shore supply + battery power supply methods are adopted. However, there is no good solution for the problem of shore supply and battery power switching. The existing technical solutions are generally relay switching circuits and manual switching on the device side. Manual switching on the device side requires the equipment to be salvaged and processed, which causes great operational difficulties. The relay switching circuit is a switching solution designed with relays as the core. It has the following three main disadvantages: first, switching delay. The reaction time of the relay is relatively slow, especially compared with solid-state switches (such as MOSFET). This delay may not be suitable for applications with strict requirements on switching speed; second, electromagnetic interference (EMI). The switching action of the relay may generate electromagnetic interference and affect surrounding electronic equipment, which may be unacceptable in some high-precision or low-interference applications; third, size and weight. Relays are usually larger and heavier than solid-state solutions. This may be a disadvantage in applications with limited space and weight. Utility Model Content

[0003] The utility model aims to provide a shore-powered and battery-powered remote switching circuit based on a MOS tube, so as to solve the difficulty of circuit switching of an underwater robot in the prior art.

[0004] A MOS-based shore power supply and battery-powered remote switching circuit includes a MOS tube U2, a battery switch P2, a first resistor R2, a second resistor R9, a single-pole double-throw switch K1, a ground terminal GND, a DC power module P1, a load positive electrode 48V+ and a load negative electrode 48V-;

[0005] 48V+ is connected to R2, P2, port 2 of K1, port 1 of K1, R9, source s of U2, drain d of U2 and 48V- in sequence;

[0006] A branch connected to the gate g of U2 is provided between port 1 of K1 and R9;

[0007] A branch is provided between R9 and the source s of U2 to connect to GND.

[0008] The resistance of R2 is 390K.

[0009] K1 includes three ports, port 1 is the normally closed port, port 2 is the com port, and port 3 is the normally open port.

[0010] There is an auxiliary relay Relay under K1, which controls port 2 of K1.

[0011] The resistance of R9 is 100K.

[0012] P1 includes 4 ports.

[0013] P1 includes two 5V ports, which are used to power the Relay.

[0014] P1 includes two 750V ports. After the 750V port is connected to the 750V to 48V converter, it is connected to 48V+ and 48V- respectively.

[0015] The battery power supply circuit is: P2 is closed, K1 is normally closed, U2 is open, the positive pole of the battery is 48V+, and the negative pole is GND.

[0016] The shore supply circuit is: P2 is closed, K1 is normally open, U2 is closed, the positive pole of the shore supply is 48V+, and the negative pole is 48V-.

[0017] Compared with the prior art, the utility model has the following beneficial effects: compared with the switching circuit with relay as the core, the utility model circuit has three advantages: first, small size. Compared with the huge size of the relay, the size of the MOS tube is very small and easy to integrate; second, the internal resistance of the MOS tube is small, especially in the high-power scenario, the heating of the MOS tube is much smaller than that of the relay; third, the response speed. The switching speed of the relay is at the level of tens of milliseconds, and the switching speed of the MOS tube is at the level of nanoseconds. Compared with the manual switching at the equipment end, the advantages of the utility model are very obvious. Through circuit design, the underwater power switching is controlled at the shore end, which greatly reduces the difficulty of operation and provides great convenience for the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a circuit diagram of the utility model.

[0019] The reference numerals include: 1-MOS tube, 2-battery switch, 3-first resistor, 4-second resistor, 5-single-pole double-throw switch, 6-ground terminal, 7-DC power supply module, 8-positive pole of load, 9-negative pole of load, 10-auxiliary relay. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] MOS-based shore and battery-powered remote switching circuit, such as Figure 1 , including a MOS tube 1, a battery switch 2, a first resistor 3, a second resistor 4, a single-pole double-throw switch 5, a ground terminal 6, a DC power module 7, a load positive electrode 8 and a load negative electrode 9;

[0022] The load positive electrode 8 is connected in sequence to the first resistor 3, the battery switch 2, the 2nd port of the single-pole double-throw switch 5, the 1st port of the single-pole double-throw switch 5, the second resistor 4, the source electrode s of the MOS tube 1, the drain electrode d of the MOS tube 1 and the load negative electrode 9;

[0023] A branch connected to the gate g of the MOS tube 1 is provided between the port 1 of the single-pole double-throw switch 5 and the second resistor 4;

[0024] A branch circuit connected to the ground terminal 6 is provided between the second resistor 4 and the source s of the MOS tube 1 .

[0025] The resistance of the first resistor 3 is 390K.

[0026] The single-pole double-throw switch 5 includes three ports, port 1 is a normally closed port, port 2 is a COM port, and port 3 is a normally open port.

[0027] An auxiliary relay 10 is provided below the single-pole double-throw switch 5 , and the auxiliary relay 10 controls two ports of the single-pole double-throw switch 5 .

[0028] The resistance of the second resistor 4 is 100K.

[0029] The DC power supply module 7 includes four ports.

[0030] The DC power supply module 7 includes two 5V ports, and the 5V ports are used to supply power to the auxiliary relay 10 .

[0031] The DC power module 7 includes two 750V ports. After the 750V ports are connected to a 750V to 48V converter, they are connected to a load positive electrode 8 and a load negative electrode 9 respectively.

[0032] The battery power supply circuit is as follows: the battery switch 2 is closed, the single-pole double-throw switch 5 is normally closed, the MOS tube 1 is turned on, the positive electrode of the battery is the load positive electrode 8, and the negative electrode is the ground terminal 6.

[0033] The shore supply circuit is as follows: the battery switch 2 is closed, the single-pole double-throw switch 5 is normally open, the MOS tube 1 is turned off, the positive pole of the shore supply is the load positive pole 8, and the negative pole is the load negative pole 9.

[0034] like Figure 1 Before the underwater robot is launched, the battery switch 2 is manually adjusted to a closed state, and the DC power module 7 does not supply power to the auxiliary relay 10, and the DC power module 7 supplies power to the system. When shore power is needed, the DC power module 7 receives a charging instruction (it can only be charged on shore), and immediately supplies power to the auxiliary relay 10. At this time, the 2nd port of the single-pole double-throw switch 5 is adjusted to the normally open end, that is, the 3rd port, so that the entire circuit is disconnected from the load, forming shore power.

[0035] In the present invention, the first resistor 3 and the second resistor 4 divide the voltage to realize the opening of the MOS tube 1, and the opening of the MOS tube 1 is related to the battery switch 2 and the single-pole double-throw switch 5. When the shore supply is powered, the battery stops supplying power to the device, and the shore supply directly supplies power to the device. Moreover, the shore supply and the battery are not connected in parallel, and the shore supply will not backflow to the battery. Whether the shore supply is turned on or off only needs to be operated at the shore base end, so there is no need to perform manual operation at the device end.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A MOS-based shore-powered and battery-powered remote switching circuit, characterized in that: It includes a MOS tube U2, a battery switch P2, a first resistor R2, a second resistor R9, a single-pole double-throw switch K1, a ground terminal GND, a DC power module P1, a load positive electrode 48V+ and a load negative electrode 48V-; 48V+ is connected to R2, P2, port 2 of K1, port 1 of K1, R9, source s of U2, drain d of U2 and 48V- in sequence; A branch connected to the gate g of U2 is provided between port 1 of K1 and R9; A branch is provided between R9 and the source s of U2 to connect to GND.

2. The MOS tube-based shore power and battery power remote switching circuit according to claim 1, characterized in that: The resistance of R2 is 390K.

3. The MOS tube-based shore power and battery power remote switching circuit according to claim 1, characterized in that: K1 includes three ports, port 1 is the normally closed port, port 2 is the com port, and port 3 is the normally open port.

4. The MOS tube-based shore power and battery power remote switching circuit according to claim 1, characterized in that: There is an auxiliary relay Relay under K1, which controls port 2 of K1.

5. The MOS tube-based shore power and battery power remote switching circuit according to claim 1, characterized in that: The resistance of R9 is 100K.

6. The MOS-based shore-powered and battery-powered remote switching circuit according to claim 1, characterized in that: P1 includes 4 ports.

7. The MOS-based shore-powered and battery-powered remote switching circuit according to claim 4, characterized in that: P1 includes two 5V ports, which are used to power the Relay.

8. The MOS-based shore-powered and battery-powered remote switching circuit according to claim 1, characterized in that: P1 includes two 750V ports. After the 750V port is connected to the 750V to 48V converter, it is connected to 48V+ and 48V- respectively.

9. The MOS-based shore-powered and battery-powered remote switching circuit according to claim 1, characterized in that: The battery power supply circuit is: P2 is closed, K1 is normally closed, U2 is open, the positive pole of the battery is 48V+, and the negative pole is GND.

10. The MOS tube-based shore power and battery power remote switching circuit according to claim 1, characterized in that: The shore supply circuit is: P2 is closed, K1 is normally open, U2 is closed, the positive pole of the shore supply is 48V+, and the negative pole is 48V-.

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