Anti-interference power supply system and method suitable for underwater vehicle

Abstract

The embodiment of the invention provides an anti-interference power supply system and method suitable for an underwater vehicle, and the system comprises a high-voltage power battery pack, a high-voltage motor, a mechanical transmission device, a low-voltage generator, a power supply switching device, and a power conversion device. The other end of the power output shaft of the high-voltage motor is connected with the low-voltage generator through the mechanical transmission device; the low-voltage generator is driven by the mechanical transmission device to generate a low-voltage power supply, and the low-voltage power supply is processed by the power supply switching device to supply power to the power conversion device; and the power conversion device performs secondary isolation conversion on the low-voltage power supply, converts the low-voltage power supply into a multi-path instrument power supply, and transmits the converted multi-path instrument power supply to the electronic system. Energy physical isolation is realized through energy conversion, strong electromagnetic interference of a power system is prevented from being transmitted to an electronic system through a cable, and the electronic system has better anti-interference capability.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater vehicle energy conversion and power supply, and in particular to an anti-interference power supply system and method suitable for underwater vehicles. Background Art

[0002] During the operation of underwater vehicles, the electronic systems such as electronic instruments and equipment carried by them need to be powered by the platform to ensure their normal operation. The traditional power supply method is to use independent instrument batteries for power supply when the space volume is sufficient. However, the multi-task and functional module combination characteristics of most underwater vehicles lead to uncertainty in the capacity of their instrument batteries, which in turn affects the overall layout and design. Another way is to use the energy storage characteristics of the large-capacity power battery pack of underwater vehicles to isolate and transform the power output of the power battery pack. Since the energy demand of the underwater vehicle electronic system is 1 to 2 orders of magnitude lower than the energy demand of the power system, the use of a common power battery pack energy method for the design of the underwater vehicle power supply architecture has become the mainstream method. In order to reduce the heat loss of the line during the high-power output of the underwater vehicle power battery pack, the power battery pack voltage is increased to reduce the working current, thereby further reducing the heat loss of the line and reducing the pulsating current during the commutation of the power system (that is, when working with high current) The generated alternating electromagnetic field interferes with the spatial radiation of the electronic system. However, the electronic system and power system of the underwater vehicle share the power battery pack energy supply mode, which will cause the reverse electromotive force and current fluctuation (strong electromagnetic interference) generated during the high-power output of the power system's motor to be directly transmitted to the electronic system, causing electromagnetic conduction interference to the electronic system of the underwater vehicle. At the same time, due to the high-voltage characteristics of the power battery pack after series and parallel connection, the electronic system needs to perform multi-stage isolation transformation during the high-voltage to low-voltage conversion process, which results in defects such as reduced efficiency, reduced safety, reduced anti-interference ability, and reduced reliability. Summary of the invention

[0003] In view of the fact that in the prior art, when the underwater vehicle power system and the electronic system share the power battery pack energy, the reverse electromotive force and current fluctuation (strong electromagnetic interference) generated during the high-power output of the motor of the power system will directly cause electromagnetic conduction interference to the electronic system. At the same time, the underwater vehicle adopts the method of increasing the power battery pack voltage to reduce the line loss of the working current, which leads to the high-voltage characteristics of the power battery pack after being connected in series and parallel, causing the electronic system to need to perform multi-stage isolation transformation during the high-voltage to low-voltage conversion process. In the process of developing the power supply circuit to realize this function, there are risks of difficulty in selecting components and high-voltage breakdown of components, which leads to defects such as reduced conversion efficiency, reduced electrical safety, reduced circuit anti-interference ability, and reduced system reliability. The embodiment of the present invention provides an anti-interference power supply system and method suitable for underwater vehicles, which adopts the method of driving a generator with the power system motor to perform power supply processing, realizes physical isolation of energy through the conversion of "electrical energy-mechanical energy-electrical energy", prevents the strong electromagnetic interference of the power system from being transmitted to the electronic system through cables, and enables the electronic system to have better anti-interference ability.

[0004] The embodiment of the present invention provides an anti-interference power supply system suitable for underwater vehicles, including: a high-voltage power battery pack, a high-voltage motor, a mechanical transmission device, a low-voltage generator, a power supply switching device, and a power supply conversion device. Specifically,

[0005] The high-voltage power battery pack drives the high-voltage electric motor to rotate. One end of the power output shaft of the high-voltage electric motor is connected to the propeller through a reducer, and the other end is connected to the low-voltage generator through the mechanical transmission device; the low-voltage generator generates a low-voltage power supply driven by the mechanical transmission device, and after being processed by the power supply switching device, supplies power to the power conversion device; the power conversion device performs secondary isolation conversion on the low-voltage power supply, converts it into a multi-channel instrument power supply, and transmits the converted multi-channel instrument power supply to the electronic system.

[0006] In some embodiments of the present invention, the low-voltage generator is connected to the high-voltage motor via the mechanical transmission device.

[0007] In some embodiments of the present invention, the anti-interference power supply system for underwater vehicles further includes:

[0008] The instrument battery is used to supply power to the electronic system before the high-voltage electric motor of the power system works. The instrument battery is used to connect the external power supply and the internal generator power supply.

[0009] In some embodiments of the present invention, the power supply switching device is used to generate electricity using a multi-stage winding generator or multiple low-voltage generators that adapt to different speed ranges in the process of stepless speed change of the high-voltage motor of the underwater vehicle power system, and switch different windings or low-voltage generators to achieve uninterrupted and reliable power supply.

[0010] In some embodiments of the present invention, the high-voltage motor, low-voltage generator, mechanical transmission device and power supply switching device can be integrated into a coaxial electric generator.

[0011] The embodiment of the present invention further provides an anti-interference power supply method applicable to an underwater vehicle. The anti-interference power supply method adopts the anti-interference power supply system applicable to an underwater vehicle as described in the above embodiment. The anti-interference power supply method includes:

[0012] Step 1: During the underwater vehicle preparation phase, the low-voltage power supply of the external test, launch and control system supplies power to its electronic system;

[0013] Step 2: During the underwater vehicle preparation phase, the power supply is switched to the internal instrument battery and the low-voltage power supply of the external measurement, launch and control system is cut off;

[0014] Step 3: During the navigation phase of the underwater vehicle, the high-voltage motor drive shaft of the power system starts to rotate and continuously output power, driving the low-voltage generator to generate electricity. After the voltage is stabilized by the power supply switching device, it is isolated and transformed by the power conversion device, and finally supplies power to the electronic system.

[0015] Compared with the prior art, the anti-interference power supply system and method for underwater vehicles provided by the embodiment of the present invention has the beneficial effect that: it realizes physical isolation of energy through "electrical energy-mechanical energy-electrical energy" conversion, prevents strong electromagnetic interference of the power system from being transmitted to the electronic system through the cable, and the power supply system has better anti-interference ability. The difficulty of the low-voltage power output by the low-voltage generator to perform voltage stabilization conversion again is reduced, and the requirements for the corresponding circuits and components are reduced, thereby improving the reliability and stability of the power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural block diagram of an anti-interference power supply system for underwater vehicles provided in an embodiment of the present invention

[0017] Figure 2 A structural block diagram of a power supply switching device in an anti-interference power supply system for underwater vehicles provided by an embodiment of the present invention

[0018] Figure 3 A flow chart of an anti-interference power supply method applicable to an underwater vehicle provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0021] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0022] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0023] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0024] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to determine the true intent based on the user's historical operations and to avoid unnecessary or redundant details that make the present application unclear. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but are merely used as the basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0025] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0026] The embodiment of the present invention provides an anti-interference power supply system suitable for underwater vehicles, including: a high-voltage power battery pack, a high-voltage motor, a mechanical transmission device, a low-voltage generator, a power supply switching device, and a power supply conversion device. Specifically,

[0027] The high-voltage power battery pack drives the high-voltage electric motor to rotate, one end of the power output shaft of the high-voltage electric motor is connected to the propeller through the reducer, and the other end is connected to the low-voltage generator through the mechanical transmission device; the low-voltage generator generates a low-voltage power supply driven by the mechanical transmission device, and after being processed by the power supply switching device, supplies power to the power conversion device; the power conversion device performs secondary isolation conversion on the low-voltage power supply and converts it into a multi-channel instrument power supply, thereby reducing line conduction and space radiation interference, and transmits the converted multi-channel instrument power supply to the electronic system to ensure that the electronic system of the underwater vehicle can work normally.

[0028] In order to facilitate the understanding of the above technical solution, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Specific embodiment one:

[0030] like Figure 1 As shown, the electrical system of the underwater vehicle mainly includes: a power supply system 1, an electronic system 2, a measurement, launch and control system 3, a transmission shaft 4 and a propeller propeller 5. The power supply system 1 supplies power to the electronic system 2 and converts electrical energy into mechanical energy, and drives the propeller propeller 5 through the transmission shaft 4 to provide propulsion power for the underwater vehicle.

[0031] The power supply system 1 mainly includes: a high-voltage motor 11, a low-voltage generator 12, a mechanical transmission device 13, a power supply switching device 14, a high-voltage power battery pack 15, a power conversion device 16 and a small instrument battery 17. The high-voltage power battery pack 15 is connected to the high-voltage motor 11, one end of the high-voltage motor 11 is connected to the propeller propeller 5 through the transmission shaft 4, and the other end is connected to the mechanical transmission device 13, the output of the mechanical transmission device 13 is connected to the low-voltage generator 12, the output of the low-voltage generator 12 is connected to the power supply switching device 14, the output of the power supply switching device 14 is connected to the power conversion device 16, the output of the small instrument battery 17 is also connected to the power conversion device 16, and the output of the power conversion device 16 is connected to each electrical device of the electronic system 2.

[0032] The low-voltage generator 12 is a single generator using multiple windings, with different windings having different numbers of coil turns, so that the voltage output range of at least one power supply does not exceed 200V under different speed ranges.

[0033] The low-voltage generator 12 is a DC permanent magnet generator, and its output voltage has been rectified.

[0034] The mechanical transmission device 13 is a gear box or a transmission shaft, which matches the rotation speed and torque.

[0035] The power supply switching device 14 controls the opening or disconnection of the voltage paths corresponding to different windings by comparing the multi-path voltage values ​​output by the low-voltage generator 12 with the voltage values ​​within the rated output range, so that the output voltage range of the power supply switching device 14 remains stable at 0V to 200V; in view of the fact that the high-voltage motor 11 of the underwater vehicle power system has a wide speed variation range during the stepless speed change process, a multi-stage winding generator or a plurality of low-voltage generators 12 adapted to different speed ranges are used to generate electricity, and a power supply switching device is provided for the multi-stage windings or a plurality of low-voltage generators with a plurality of different speed ranges. The speed coverage areas of the windings or a plurality of low-voltage generators 12 with a plurality of different speed ranges overlap, and the power supply switching device 14 ensures that when the output speed of the high-voltage motor 11 changes within different ranges, the output power fluctuation is reduced by switching the output power supplies of different windings or low-voltage generators 12, so as to achieve the purpose of uninterrupted and reliable power supply.

[0036] The output voltage of the high-voltage power battery pack 15 is not less than 500V.

[0037] The power conversion device 16 isolates and converts the 0V-200V power supply voltage output by the power supply switching device 14 into a stable power supply required by the electronic system 2 such as 48V, 28V, 12V, 5V, 3.3V, etc.

[0038] The working time of the small instrument battery is no more than 10 minutes, and it realizes the uninterrupted power supply function during the period after the measurement, launch and control system 3 is powered off and before the power supply switching device 14 supplies power, ensuring that the electronic system of the underwater vehicle is powered on throughout the whole process. The small instrument battery can be a chemical energy source such as a lithium battery and a thermal battery.

[0039] like Figure 2 As shown, the power supply switching device 14 mainly includes a control comparison circuit 141, a path control switch 142 and a path control switch 143. The power conversion device 16 continuously supplies power to the control comparison circuit 141, so that it is always in a normal working state; the first power supply and the second power supply output by the low-voltage generator 12 enter the power supply switching device 14 respectively, and due to the turn setting of the low-voltage generator 12, the first power supply is always higher than the second power supply. When the high-voltage motor 11 is at a low speed, the first power supply and the second power supply are both lower than 200V, at which time the path control switch 142 is turned on and the path control switch 143 is turned off; when the high-voltage motor 11 is at a high speed, the first power supply is higher than 200V, but the second power supply is lower than 200V, at which time the path control switch 142 is turned off and the path control switch 143 is turned on, and the control comparison circuit interlocks the path control switch 142 and the path control switch 143 so that only one power path is turned on at the same time, and the power supply switching device 14 outputs a power supply lower than 200V to the power conversion device, so that it can supply power to the electronic system of the underwater vehicle after isolation and conversion.

[0040] like Figure 3 As shown, for the entire process from preparation, preparation to actual navigation of the underwater vehicle, the power supply system 1 of the underwater vehicle supplies power to the electronic system 2, including the following steps:

[0041] Step 1: During the underwater vehicle preparation phase, the low-voltage power supply of the external measurement, launch and control system supplies power to its electronic system.

[0042] Step 2: After the external test, launch and control system supplies power, the underwater vehicle performs product self-inspection and parameter binding.

[0043] Step 3: During the underwater vehicle preparation phase, it is continuously determined whether the conditions for power transfer are met. When it is determined that the conditions for power transfer are met, the power supply is switched to the internal small instrument battery and the low-voltage power supply of the external measurement, launch and control system is cut off.

[0044] Step 4: During the navigation phase of the underwater vehicle, after the underwater vehicle is disconnected from the external measurement, launch and control system, the high-voltage power battery pack supplies power to the high-voltage motor, the high-voltage engine starts, and the electrical energy of the high-voltage power battery pack is converted into mechanical energy output.

[0045] Step 5: The high-voltage motor drives the mechanical transmission device to drive the low-voltage generator to generate electricity. The output power is stabilized by the power supply switching device and then supplies power to the power conversion device. The judgment process is as follows: when the voltage of the first power supply path is ≤200V, the first power supply path is turned on and the second power supply path is turned off; when the voltage of the first power supply path is greater than 200V, the first power supply path is turned off and the second power supply path is turned on.

[0046] Step 6: The power conversion device supplies power to the underwater vehicle electronic system after taking anti-interference measures such as voltage stabilization, isolation, and filtering. Specific embodiment 2:

[0048] The low-voltage generator 12 in the power supply system 1 is a combination of multiple single generators. Different single generators achieve basically the same voltage output range under at least two speed ranges through different adaptation relationships of the speed range (that is, the output voltage range of the high-speed single generator is basically the same as that of the low-speed single generator). The rest is the same as the specific embodiment 1 and will not be described in detail here. Specific embodiment three:

[0050] In the power supply system 1, the high-voltage motor 11, the low-voltage generator 12, the mechanical transmission device 13 and the power supply switching device 14 are integrated into a coaxial electric generator to save volume and weight. The rest is the same as the specific embodiment 1 and will not be described in detail here.

[0051] It can be seen from the above technical solutions that the anti-interference power supply system and method suitable for underwater vehicles provided by the above embodiments of the present invention realizes physical isolation of energy through "electrical energy-mechanical energy-electrical energy" conversion, prevents strong electromagnetic interference of the power system from being transmitted to the electronic system through cables, and the power supply system has better anti-interference ability. The difficulty of the low-voltage power supply output by the low-voltage generator to perform voltage stabilization conversion again is reduced, and the requirements for the corresponding circuits and components are reduced, thereby improving the reliability and stability of the power supply system.

[0052] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. An anti-interference power supply system suitable for underwater vehicles, characterized in that: include: High-voltage power battery pack, high-voltage motor, mechanical transmission device, low-voltage generator, power supply switching device, power conversion device, specifically, The high-voltage power battery pack drives the high-voltage electric motor to rotate. One end of the power output shaft of the high-voltage electric motor is connected to the propeller through a reducer, and the other end is connected to the low-voltage generator through the mechanical transmission device; the low-voltage generator generates a low-voltage power supply driven by the mechanical transmission device, and after being processed by the power supply switching device, supplies power to the power conversion device; the power conversion device performs secondary isolation conversion on the low-voltage power supply, converts it into a multi-channel instrument power supply, and transmits the converted multi-channel instrument power supply to the electronic system.

2. The anti-interference power supply system for underwater vehicles according to claim 1, characterized in that: The low-voltage generator is connected to the high-voltage motor through the mechanical transmission device.

3. The anti-interference power supply system for underwater vehicles according to claim 1, characterized in that: Also includes: The instrument battery is used to supply power to the electronic system before the high-voltage electric motor of the power system works. The instrument battery is used to connect the external power supply and the internal generator power supply.

4. The anti-interference power supply system for underwater vehicles according to claim 1, characterized in that: The power supply switching device is used to address the situation where the high-voltage motor of the underwater vehicle power system has a wide speed variation range during the stepless speed change process. A multi-stage winding generator or multiple low-voltage generators that adapt to different speed ranges are used for power generation, and different windings or low-voltage generators are switched to achieve uninterrupted and reliable power supply with a controllable voltage range.

5. The anti-interference power supply system for underwater vehicles according to claim 1, characterized in that: The high-voltage motor, low-voltage generator, mechanical transmission device and power supply switching device can be integrated into a coaxial electric generator.

6. An anti-interference power supply method suitable for underwater vehicles, characterized in that: The anti-interference power supply method adopts the anti-interference power supply system suitable for underwater vehicles according to any one of claims 1 to 5, and the anti-interference power supply method includes: Step 1: During the underwater vehicle preparation phase, the low-voltage power supply of the external test, launch and control system supplies power to its electronic system; Step 2: During the underwater vehicle preparation phase, the power supply is switched to the internal instrument battery and the low-voltage power supply of the external measurement, launch and control system is cut off; Step 3: During the navigation phase of the underwater vehicle, the high-voltage motor drive shaft of the power system starts to rotate and continuously output power, driving the low-voltage generator to generate electricity. After the voltage is stabilized by the power supply switching device, it is isolated and transformed by the power conversion device, and finally supplies power to the electronic system.

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