Ship power supply control circuit

Abstract

The utility model discloses a ship power supply control circuit, which comprises a main power supply circuit and a standby power supply circuit, wherein the output ends of the main power supply circuit and the standby power supply circuit are electrically connected with a terminal; a normally open contact is located at the output end of the main power supply circuit, one end of the main contactor is electrically connected with an input circuit of the main power supply circuit, and the other end of the main contactor is electrically connected with an output circuit of the main power supply circuit; a normally open contact is located at the output end of the standby power supply circuit, one end of the standby contactor is electrically connected with an input circuit of the standby power supply circuit, and the other end is electrically connected with an output circuit of the standby power supply circuit; the mutual inductance coil is located in the middle of the main power circuit and used for collecting the voltage of the main power circuit to control the normally open contact of the main contactor to be switched off and the normally open contact of the standby contactor to be switched on.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of ship power control, especially a ship power control circuit. BACKGROUND

[0002] The ship is usually configured with multiple power supply devices, such as diesel generators, storage batteries, etc., and the power supply is generally alternating current power supply, direct current power supply, etc. The important electrical equipment on the ship, such as radio equipment, etc. needs to be powered by multiple alternating current and direct current power supplies respectively. According to the requirements of the relevant regulations and specifications of the ship, the standby power supply needs to be used to power the equipment when the main power supply loses power, so as to ensure the continuous, safe and reliable operation of the equipment. The current switching of the main power supply and the standby power supply is mainly completed by using a change-over switch or a power supply conversion device to supply power to each route, that is, when one of the power supply routes loses power, the other power supply route automatically realizes the conversion of power supply through the automatic change-over switch or the power supply conversion device. However, the use of the change-over switch or the power supply conversion device cannot detect the voltage drop of the power supply, and when the voltage drops to a certain extent, the line is still used for power supply. The important electrical equipment cannot operate normally due to insufficient power supply voltage, thereby causing the problem of safety hazards. SUMMARY

[0003] The utility model provides a ship power control circuit capable of detecting the voltage of the power supply, so as to provide safety protection for the power supply line of the important electrical equipment of the ship.

[0004] The ship power control circuit comprises a main power supply line and a standby power supply line, both of which are electrically connected to a terminal.

[0005] The normally open contact of the main contactor is located at the output end of the main power supply line, one end of which is electrically connected to the input line of the main power supply line, and the other end of which is electrically connected to the output line of the main power supply line.

[0006] The normally open contact of the standby contactor is located at the output end of the standby power supply line, one end of which is electrically connected to the input line of the standby power supply line, and the other end of which is electrically connected to the output line of the standby power supply line.

[0007] The main coil mutual inductor is located in the middle of the main power supply line and is used to collect the voltage of the main power supply line to control the normally open contact of the main contactor to be disconnected and the normally open contact of the standby contactor to be closed.

[0008] The ship power control circuit can disconnect the normally open contact of the main contactor and close the normally open contact of the standby contactor when the voltage of the main power supply drops to a certain extent, so as to enable the standby power supply to supply power to the important electrical equipment of the ship and provide safety protection for the power supply line of the important electrical equipment of the ship.

[0009] As a preferred solution of the present invention, one end of the main coil mutual inductor is electrically connected to a wire of the main power line, and the other end is electrically connected to another wire of the main power line;

[0010] One end of the coil of the main contactor is electrically connected to a wire of the main power line through the normally closed contact of the backup contactor, and the other end is electrically connected to another wire of the main power line;

[0011] One end of the coil of the backup contactor is electrically connected to a wire of the backup power line through the normally closed contact of the main coil mutual inductor and the normally closed contact of the main contactor, and the other end is electrically connected to another wire of the backup power line.

[0012] As a preferred solution of the utility model, it also includes: a mutual inductance coil located in the middle of the backup power supply line, a backup coil mutual inductor for collecting the backup power supply line voltage to control the closure of the normally open contact of the backup contactor.

[0013] As a preferred solution of the present invention, one end of the backup coil mutual inductor is electrically connected to a wire of the backup power line, and the other end is electrically connected to another wire of the backup power line;

[0014] A normally open contact of the standby coil mutual inductor is also connected in front of the normally closed contact of the main coil mutual inductor at one end of the standby contactor coil.

[0015] As a preferred solution of the present invention, a normally open contact of the main coil mutual inductor is connected in front of the normally closed contact of the backup contactor at one end of the main contactor coil.

[0016] As a preferred solution of the present invention, a main circuit breaker and a backup circuit breaker are respectively provided at the input ends of the main power supply line and the backup power supply line, one end of the main circuit breaker is electrically connected to the main power supply, and the other end is electrically connected to the input end of the main power supply line, one end of the backup circuit breaker is electrically connected to the backup power supply, and the other end is electrically connected to the input end of the backup power supply line.

[0017] As a preferred solution of the present invention, a main fuse line and a backup fuse line are respectively provided at the input ends of the main power line and the backup power line, and the main fuse line and the backup fuse line are respectively located below the main circuit breaker and the backup circuit breaker.

[0018] As a preferred solution of the present invention, when the terminal is a DC power device, an AC-DC converter for converting AC power into DC output is provided on the AC output ends of the main power line and the backup power line.

[0019] As a preferred scheme of the utility model, when the terminal is an alternating current electrical equipment, a direct alternating converter for converting direct current into alternating current output is arranged on the direct current output end of the main power supply circuit and the standby power supply circuit.

[0020] As a preferred scheme of the utility model, a diode is arranged on the direct current output end of the main power supply circuit and the standby power supply circuit. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The main power supply circuit and the standby power supply circuit of the utility model ship power supply control circuit are all schematic diagrams of using alternating current power supply and outputting alternating current equipment power supply.

[0022] Figure 2 The main power supply circuit and the standby power supply circuit of the utility model ship power supply control circuit are all schematic diagrams of using direct current power supply and outputting direct current equipment power supply.

[0023] Figure 3 The main power supply circuit uses an alternating current power supply, the standby power supply circuit uses an alternating current power supply and a direct current power supply, and the output is a schematic diagram of alternating current equipment power supply.

[0024] Figure 4 The main power supply circuit uses an alternating current power supply, the standby power supply circuit uses an alternating current power supply and a direct current power supply, and the output is a schematic diagram of direct current equipment power supply. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] A ship power supply control circuit comprises a main power supply circuit and a standby power supply circuit, both of which are electrically connected to a terminal; a normally open contact is located at the output end of the main power supply circuit, one end of which is electrically connected to the input circuit of the main power supply circuit, and the other end of which is electrically connected to the output circuit of the main power supply circuit; a main contact KM1 is arranged, one end of which is electrically connected to the input circuit of the main power supply circuit, and the other end of which is electrically connected to the output circuit of the main power supply circuit; a normally open contact is located at the output end of the standby power supply circuit, one end of which is electrically connected to the input circuit of the standby power supply circuit, and the other end of which is electrically connected to the output circuit of the standby power supply circuit; a standby contact KM2 is arranged, one end of which is electrically connected to the input circuit of the standby power supply circuit, and the other end of which is electrically connected to the output circuit of the standby power supply circuit; a mutual inductor is located in the middle of the main power supply circuit, which is used for collecting the main power supply circuit voltage to control the normally open contact KM1-1 of the main contact and the normally open contact KM2-1 of the standby contact to be disconnected and closed.

[0027] The input end of the main power supply circuit is provided with a main circuit breaker Q1 and a main fuse FU1. The input end of the standby power supply circuit is provided with a standby circuit breaker Q2 and a standby fuse FU2. The main circuit breaker Q1, the main fuse FU1, the standby circuit breaker Q2 and the standby fuse FU2 can provide safety protection for the circuit.

[0028] One end of the main coil transformer KA1 is electrically connected with one wire of the main power supply circuit, and the other end is electrically connected with the other wire of the main power supply circuit. One end of the coil of the main contactor is electrically connected with one wire of the main power supply circuit through the normally closed contact KM2-2 of the standby contactor, and the other end is electrically connected with the other wire of the main power supply circuit. One end of the coil of the standby contactor is electrically connected with one wire of the standby power supply circuit through the normally closed contact KA1-1 of the main coil transformer and the normally closed contact KM1-2 of the main contactor, and the other end is electrically connected with the other wire of the standby power supply circuit.

[0029] As shown in Figure 1 , the main power supply circuit and the standby power supply circuit are both AC power supply, and the output is also for AC equipment. AC power supply ① is electrically connected with the main power supply circuit, and AC power supply ② is electrically connected with the standby circuit breaker Q2. In normal working condition, the main circuit breaker Q1 and the standby circuit breaker Q2 are closed, and AC power supply ① and AC power supply ② are connected at the same time. When the voltage of AC power supply ① is sufficient, AC equipment is powered by AC power supply ①, and AC power supply ② is not put into use. When AC power supply ① loses power or fails, the coil of the main coil transformer KA1 loses power, and the normally closed contact KA1-1 of the main coil transformer is in a closed state. The coil of the main contactor KM1 loses power, and the normally closed contact KM1-2 of the main contactor is in a closed state. The coil of the standby contactor KM2 is powered, the normally open contact KM2-1 of the standby contactor is closed, and the normally closed contact KM2-2 of the standby contactor is disconnected. At this time, AC equipment is powered by AC power supply ② of the standby power supply circuit. When the main coil transformer KA1 detects that AC power supply ① returns to normal, the coil of the main coil transformer KA1 is powered again, the normally closed contact KA1-1 of the main coil transformer is disconnected, the coil of the standby contactor KM2 is powered off, and the normally closed contact KM2-2 of the standby contactor is closed. The coil of the main contactor KM1 is powered again, and the normally open contact KM1-1 of the main contactor KM1 is connected. At this time, AC equipment is powered by AC power supply ① of the main power supply circuit.

[0030] The ship power supply control circuit is further provided with a standby coil mutual inductor KA2 for collecting the standby power supply line voltage to control the normally open contact of the standby contactor. One end of the standby coil mutual inductor is electrically connected to one wire of the standby power supply line, and the other end is electrically connected to the other wire of the standby power supply line. The normally open contact KA2-1 of the standby coil mutual inductor is further connected in front of the normally closed contact of the main coil mutual inductor at one end of the main contactor coil.

[0031] The normally open contact KA1-2 of the main coil mutual inductor is further connected in front of the normally closed contact of the standby contactor at one end of the main contactor coil.

[0032] As shown in Figure 2 The main power supply line and the standby power supply line are both direct current power supplies, and the output is also direct current power supply for the direct current equipment. When the voltage of the direct current power supply ① is sufficient, the direct current equipment is powered by the direct current power supply ①, and the direct current power supply ② is not put into operation. When the voltage of the direct current power supply ① is too low, loses power or fails, and the voltage of the direct current power supply ② is normal, the coil of the main coil mutual inductor KA1 loses power, the normally closed contact KA1-1 of the main coil mutual inductor is in a closed state, the normally closed contact KA1-2 of the main coil mutual inductor is in an open state, the coil of the main contactor KM1 loses power, the normally closed contact KM1-2 of the main contactor is in a closed state, the normally open contact KA2-1 of the standby coil mutual inductor is in a closed state, and the coil of the standby contactor KM2 is powered, the normally open contact KM2-1 of the standby contactor is closed, and the normally closed contact KM2-2 of the standby contactor is opened. At this time, the direct current equipment is powered by the direct current power supply ② of the standby power supply line. When the main coil mutual inductor KA1 detects that the direct current power supply ① restores to normal, the coil of the main coil mutual inductor KA1 is powered again, the normally closed contact KA1-1 of the main coil mutual inductor is opened, the normally closed contact KA1-2 of the main coil mutual inductor is in a closed state, the coil of the standby contactor KM2 is powered, the normally closed contact KM2-2 of the standby contactor is closed, the coil of the main contactor KM1 is powered again, and the normally open contact KM1-1 of the main contactor KM1 is connected. At this time, the direct current equipment is powered by the direct current power supply ① of the main power supply line. Thus, the situation that the voltage of the lead-acid storage battery of the direct current power supply decreases can be detected, the standby power supply is enabled to power the important electrical equipment of the ship, and safety protection is provided for the power supply line of the important electrical equipment of the ship.

[0033] In addition, when the voltage of the direct current power supply ② is too low, loses power or fails, the normally open contact KA2-1 of the standby coil mutual inductor is in an open state, and the direct current power supply ① can be switched back to power the terminal output or the next standby power supply line in turn to power the equipment.

[0034] In addition, diodes D are arranged on the direct current output ends of the main power supply circuit and the standby power supply circuit, and the diodes D are arranged on the positive lines of the main power supply circuit and the standby power supply circuit, thereby playing a better protection role for the circuit.

[0035] As shown in Figure 3 the main power supply circuit adopts an alternating current power supply ①, the standby power supply circuit adopts an alternating current power supply ② and a direct current power supply, and the output is used for supplying power to an alternating current equipment, so a direct alternating current converter D / A for converting direct current into alternating current output needs to be arranged on the line output end of the direct current power supply side, and at this time, a coil mutual inductor KA3, a circuit breaker Q3, a fuse FU3 and a contactor KM3 are also arranged on the line of the direct current power supply, one end of the coil of the main contactor KM1 is electrically connected with one wire of the main power supply circuit through the normally closed contact KM2-2 of the standby contactor and the normally closed contact KM3-2 of the contactor KM3, one end of the coil of the standby contactor KM2 is electrically connected with one wire of the standby power supply circuit through the normally closed contact KA1-1 of the main coil mutual inductor, the normally closed contact KM1-2 of the main contactor and the contactor KM3-3, and one end of the coil of the contactor KM3 is electrically connected with one wire of the direct current power supply line through the normally closed contact KA1-2 of the main coil mutual inductor, the normally closed contact KM1-3 of the main contactor, the normally closed contact KM2-3 of the standby contactor, the normally open contact KA3-1 of the coil mutual inductor and the normally closed contact KA2-1 of the standby coil mutual inductor. Through the collection and monitoring of the line voltage of the alternating current power supply ① by the main coil mutual inductor KA1, the collection and monitoring of the line voltage of the alternating current power supply ② by the standby coil mutual inductor KA2 and the collection and monitoring of the line voltage of the direct current power supply by the coil mutual inductor KA3, the alternating current equipment can be sequentially switched to be supplied with power by the alternating current power supply ② and the direct current power supply when the voltage of the alternating current power supply ① decreases to a certain extent.

[0036] As shown in Figure 4 the main power supply circuit adopts an alternating current power supply ①, the standby power supply circuit adopts an alternating current power supply ② and a direct current power supply, and the output is used for supplying power to an alternating current equipment, so a direct alternating current converter D / A for converting direct current into alternating current output needs to be arranged on the line output end of the direct current power supply side, and at this time, a coil mutual inductor KA3, a circuit breaker Q3, a fuse FU3 and a contactor KM3 are also arranged on the line of the direct current power supply, one end of the coil of the main contactor KM1 is electrically connected with one wire of the main power supply circuit through the normally closed contact KM2-2 of the standby contactor and the normally closed contact KM3-2 of the contactor KM3, one end of the coil of the standby contactor KM2 is electrically connected with one wire of the standby power supply circuit through the normally closed contact KA1-1 of the main coil mutual inductor, the normally closed contact KM1-2 of the main contactor and the contactor KM3-3, and one end of the coil of the contactor KM3 is electrically connected with one wire of the direct current power supply line through the normally closed contact KA1-2 of the main coil mutual inductor, the normally closed contact KM1-3 of the main contactor, the normally closed contact KM2-3 of the standby contactor, the normally open contact KA3-1 of the coil mutual inductor and the normally closed contact KA2-1 of the standby coil mutual inductor. Through the collection and monitoring of the line voltage of the alternating current power supply ① by the main coil mutual inductor KA1, the collection and monitoring of the line voltage of the alternating current power supply ② by the standby coil mutual inductor KA2 and the collection and monitoring of the line voltage of the direct current power supply by the coil mutual inductor KA3, the alternating current equipment can be sequentially switched to be supplied with power by the alternating current power supply ② and the direct current power supply when the voltage of the alternating current power supply ① decreases to a certain extent.

[0037] The above embodiments are only used to illustrate the detailed scheme of the utility model, and the utility model is not limited to the above detailed scheme, that is, it does not mean that the utility model must rely on the above detailed scheme to be implemented. The skilled in the art should understand that any improvement on the utility model, equivalent replacement of the raw materials of the utility model product and addition of auxiliary ingredients, selection of specific modes and the like all fall within the protection scope and disclosure scope of the utility model.

Claims

1. A marine power supply control circuit, characterized by, including a main power supply circuit and a backup power supply circuit, both output ends of which are electrically connected to the terminal; A main contactor (KM1) having a normally open contact located at an output end of a main power line, one end of which is electrically connected to an input line of the main power line, and the other end of which is electrically connected to an output line of the main power line; A backup contactor (KM2) having a normally open contact located at the output end of the backup power supply circuit, one end of which is electrically connected to the input circuit of the backup power supply circuit, and the other end of which is electrically connected to the output circuit of the backup power supply circuit; The mutual inductor is located in the middle of the main power line and is used to collect the voltage of the main power line to control the main coil mutual inductor (KA1) to open the normally open contacts of the main contactor and close the normally open contacts of the standby contactor.

2. A marine power supply control circuit according to claim 1, characterised in that, One end of the main coil mutual inductor is electrically connected to a wire of the main power line, and the other end is electrically connected to another wire of the main power line; One end of the coil of the main contactor is electrically connected to a wire of the main power line through the normally closed contact of the backup contactor, and the other end is electrically connected to another wire of the main power line; One end of the coil of the backup contactor is electrically connected to a wire of the backup power line through the normally closed contact of the main coil mutual inductor and the normally closed contact of the main contactor, and the other end is electrically connected to another wire of the backup power line.

3. A marine power control circuit according to claim 2, characterised in that, Also includes: The mutual inductance coil is located in the middle of the backup power supply line and is used to collect the voltage of the backup power supply line to control the closure of the normally open contacts of the backup contactor.

4. A marine power supply control circuit according to claim 3, characterised in that, One end of the standby coil mutual inductor is electrically connected to one wire of the standby power line, and the other end is electrically connected to another wire of the standby power line; A normally open contact of the standby coil mutual inductor is also connected in front of the normally closed contact of the main coil mutual inductor at one end of the standby contactor coil.

5. A marine power supply control circuit according to claim 4, characterised in that, The normally open contact of the main coil mutual inductor is also connected in front of the normally closed contact of the standby contactor at one end of the main contactor coil.

6. The marine power control circuit of claim 1, wherein, A main circuit breaker (Q1) and a backup circuit breaker (Q2) are respectively provided at the input ends of the main power supply line and the backup power supply line. One end of the main circuit breaker is electrically connected to the main power supply, and the other end is electrically connected to the input end of the main power supply line. One end of the backup circuit breaker is electrically connected to the backup power supply, and the other end is electrically connected to the input end of the backup power supply line.

7. A marine power supply control circuit according to claim 6, characterised in that, A main fuse line (FU1) and a backup fuse line (FU2) are respectively provided at the input ends of the main power supply line and the backup power supply line. The main fuse line and the backup fuse line are respectively located below the main circuit breaker and the backup circuit breaker.

8. A marine power supply control circuit according to any one of claims 1-7, characterized in that, When the terminal is a DC power-consuming device, an AC / DC converter (A / D) is provided at the AC output end of the main power line and the backup power line to convert AC power into DC output.

9. A marine power supply control circuit according to any one of claims 1-7, characterized in that, When the terminal is an AC power device, a direct-to-alternating current (D / A) converter is provided at the DC output end of the main power line and the backup power line to convert DC power into AC output.

10. A marine power supply control circuit according to any one of claims 1-7, characterized in that, Diodes (D) are provided at the DC power output ends of the main power supply line and the backup power supply line.

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