Emergency power supply system

Abstract

The utility model relates to the technical field of generators, in particular to an emergency power supply system. The emergency power supply system comprises a variable frequency motor, a starting control module, an inverter, a starting motor, a power piece and an energy storage battery, the output end of the variable frequency motor is electrically connected with the input end of the inverter; a rotor of the variable frequency motor is in transmission connection with the power part; the starting control module is in communication connection with the inverter and the starting motor and is electrically connected with the energy storage battery. The inverter is in communication connection with the energy storage battery and is electrically connected with the power piece; the starting motor is electrically connected with the energy storage battery and is in transmission connection with the power piece, and the problems that the battery function is single, the load cannot be carried by instant overload of the generator, and the energy use efficiency is low can be solved.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, and specifically to an emergency power supply system. Background Technology

[0002] Generators are mechanical devices that convert mechanical energy into electrical energy. They work by converting energy generated by a power source into mechanical energy, which is then transmitted to a generator, and finally converted into electrical energy. The power source can be a water turbine (driven by water flow), a steam turbine (driven by airflow), a diesel engine (driven by fuel combustion), or other power machinery.

[0003] In home emergency power scenarios, generators use power-driven industrial frequency generators to directly supply power to household loads. Generators require batteries and starter motors, with the battery only involved in starting the generator, making its function relatively simple. Furthermore, traditional generators have a fixed speed, calculated as F = P * N / 60, where F represents the generator's frequency in Hertz (Hz), P represents the number of pole pairs, and N represents the generator's speed in revolutions per minute (rpm). When users select generators for electric loads, there is a possibility of momentary overload where the generator cannot handle the load. Additionally, the efficiency of generators varies under different loads, and generators need to run continuously while waiting, resulting in relatively low energy efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an emergency power supply system that can solve the problems of single battery function, generator inability to support load during instantaneous overload, and low energy efficiency.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model provides an emergency power supply system, including: a variable frequency motor, a start control module, an inverter, a starter motor, a power component, and an energy storage battery; the output terminal of the variable frequency motor and the input terminal of the inverter are electrically connected, and the rotor of the variable frequency motor and the power component are drive-connected; the start control module is communicatively connected to the inverter and the starter motor, and electrically connected to the energy storage battery; the inverter is communicatively connected to the energy storage battery and electrically connected to the power component; the starter motor and the energy storage battery are electrically connected, and are drive-connected to the power component.

[0007] By adopting the above technical solution, the inverter can collect the speed signal of the power components and control their shutdown and speed regulation. The power components can drive the variable frequency motor to generate electricity, and the variable frequency motor can provide power to the inverter. Therefore, the speed of the variable frequency motor can be adjusted, thereby improving energy efficiency. When the emergency power system needs to be started, the energy storage battery supplies power to the starter motor, which in turn provides power to the power components. The inverter can output power and also supply power to the energy storage battery. The energy storage battery can provide power to the power components to start the variable frequency motor; it can also store energy, eliminating the need for external charging; and it can also output power, solving the problem of limited functionality and avoiding the situation where the generator cannot handle the load due to instantaneous overload. At the same time, the inverter can send start / stop signals to the start control module, which can control the starter motor to rotate. The starter motor drives the power components to rotate, and the energy storage battery can also supply power to the start control module.

[0008] Optionally, the inverter includes a rectifier and voltage regulator module, a DC-AC inverter module, and a DC-DC converter module; the input terminal of the rectifier and voltage regulator module is electrically connected to the output terminal of the variable frequency motor, the DC-AC inverter module and the DC-DC converter module are connected in parallel to the rectifier and voltage regulator module, and the DC-AC inverter module is communicatively connected to the energy storage battery.

[0009] By adopting the above technical solution, after the emergency power system is started, the rectifier and voltage regulator module, together with the DC-AC inverter module, can provide AC power, and the inverter output meets the rated output voltage requirements. The DC-DC conversion module can output the DC power provided by the rectifier and voltage regulator module to charge the energy storage battery. When the energy storage battery discharges, it outputs DC power, which can be output as AC power and / or DC power through the DC-AC inverter module and / or the DC-DC conversion module.

[0010] Optionally, the inverter is connected to a mode selection module, which is used to select between the energy-saving mode, hybrid mode, generator mode, and energy storage mode of the emergency power system.

[0011] By adopting the above technical solution, the mode selection module can switch the working mode of the emergency power system, improving its applicability during use.

[0012] Optionally, the inverter is connected to a photovoltaic power generation module and / or a wind power generation module.

[0013] By adopting the above technical solutions, photovoltaic power generation modules and / or wind power generation modules can generate electricity and supply power through inverters.

[0014] In summary, the beneficial technical effects of this utility model are as follows:

[0015] This emergency power system, through the coordinated operation of a variable frequency motor, a starting control module, an inverter, a starter motor, power components, and an energy storage battery, enables the multi-functional use of batteries, solves the problem of generators being unable to handle loads during instantaneous overload, and also improves energy efficiency. Attached image description:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Explanation of reference numerals in the attached diagram: 1. Variable frequency motor; 2. Start-up control module; 3. Inverter; 31. Rectifier and voltage regulator module; 32. DC-AC inverter module; 33. DC-DC converter module; 4. Starter motor; 5. Power component; 6. Energy storage battery; 7. Mode selection module. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0019] The terminology used in the following embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the specification and appended claims of this utility model, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this utility model refers to and includes any or all possible combinations of one or more of the listed items. The term “exemplary” means “serving as an example, embodiment, or illustration,” and any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. The terms “first” and “second” are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include one or more of that feature, and in the description of embodiments of this utility model, unless otherwise stated, “a plurality” means two or more.

[0020] This embodiment provides an emergency power supply system.

[0021] refer to Figure 1 An emergency power supply system includes: a variable frequency motor 1, a start control module 2, an inverter 3, a starter motor 4, a power component 5, and an energy storage battery 6.

[0022] The output terminal of the variable frequency motor 1 is electrically connected to the input terminal of the inverter 3, and the rotor of the variable frequency motor 1 is driven by the power component 5. The starter control module 2 is communicatively connected to the inverter 3 and the starter motor 4, and electrically connected to the energy storage battery 6. The inverter 3 is also communicatively connected to the energy storage battery 6 and electrically connected to the power component 5. The output terminal of the inverter 3 can be connected to the load to provide power. The starter motor 4 is also electrically connected to the energy storage battery 6 and driven by the power component 5.

[0023] refer to Figure 1 The inverter 3 includes a rectifier and voltage regulator module 31, a DC-AC inverter module 32, and a DC-DC converter module 33. The input terminal of the rectifier and voltage regulator module 31 serves as the input terminal of the inverter 3 and is electrically connected to the output terminal of the variable frequency motor 1. The DC-AC inverter module 32 and the DC-DC converter module 33 are connected in parallel to the rectifier and voltage regulator module 31. The two output terminals of the DC-AC inverter module 32 and the DC-DC converter module 33 serve as the output terminals of the inverter 3, capable of connecting to the load and outputting AC and DC power respectively. The DC-DC converter module 33 is also electrically connected to the energy storage battery 6.

[0024] In the aforementioned emergency power system, inverter 3 can collect the speed signal of power component 5 and perform shutdown and speed control on power component 5. Power component 5 can drive variable frequency motor 1 to generate electricity, and variable frequency motor 1 can provide AC power to inverter 3 (rectifier and voltage regulator module 31). After rectification by rectifier and voltage regulator module 31, the AC power is converted into DC power. Since the speed of power component 5 can be controlled, the speed of variable frequency motor 1 can be adjusted, thereby improving energy efficiency.

[0025] When the emergency power system needs to be activated, the energy storage battery 6 supplies power to the starter motor 4, which in turn provides power to the power unit 5. Once the emergency power system is activated, the rectifier and voltage regulator module 31, in conjunction with the DC-AC inverter module 32, provides AC power, and the inverter 3 outputs voltages that meet the rated output requirements. The DC-DC converter module 33 outputs the DC power provided by the rectifier and voltage regulator module 31 to charge the energy storage battery 6. When the energy storage battery 6 discharges, it outputs DC power, which can be used to output AC and / or DC power through the DC-AC inverter module 32 and / or the DC-DC converter module 33. In this process, the energy storage battery 6 provides power to the power unit 5 to start the variable frequency motor 1; it also stores energy, eliminating the need for external charging; and it outputs power, thus solving the problem of limited functionality and preventing the generator from being unable to handle the load due to instantaneous overload.

[0026] Meanwhile, the inverter 3 can send start / stop signals to the start control module 2 for control. The start control module 2 can control the start motor 4 to rotate, and the start motor 4 drives the power component 5 to rotate. The energy storage battery 6 can also provide power to the start control module 2.

[0027] Inverter 3 is connected to mode selection module 7, and can also connect to photovoltaic power generation modules and / or wind power generation modules. The emergency power system can operate in four modes for home emergency power needs, selectable via mode selection module 7: energy-saving mode, hybrid mode, generator mode, and energy storage mode. Customers can choose the appropriate mode based on their specific application scenario.

[0028] Specifically, in energy-saving mode, the power supply is primarily provided by the energy storage battery 6 to the load, while simultaneously monitoring the battery's charge level and the load size. When the load power exceeds the set power or the energy storage battery 6's charge level reaches the set alarm value, the inverter 3 issues an alarm through its own alarm module. An alarm is triggered for excessive load, and the output is shut down.

[0029] When the energy storage battery 6 has a low charge, the inverter 3 sends a start control signal to the start control module 2, which then starts the variable frequency motor 1. At this time, the inverter 3 switches to using the variable frequency motor 1 to power the load, and uses the excess power to charge the energy storage battery 6. When the energy storage battery 6 reaches a set protection point, the inverter 3 sends a shutdown signal to the start control module 2 to shut down the power unit 5, or the inverter 3 directly shuts down the power unit 5, continuing the cycle of this energy-saving mode. This effectively improves the energy efficiency of the generator, thereby better utilizing energy and reducing the consumption of traditional fuels.

[0030] In hybrid mode, the inverter motor 1 is the primary motor by default. When a sudden drop in the speed of inverter motor 1 is detected, or when the rectifier and voltage regulator module 31 falls below a certain value, the inverter 3 controls the DC-DC control module to supplement the output of inverter motor 1 with the energy storage battery 6. In other words, the energy storage battery 6 and inverter motor 1 operate in parallel. This design can be used for some power tool loads. This application scenario avoids the problem of conventional generators failing to start power tools, achieving strong overload resistance.

[0031] In generator mode, the traditional generator function is retained, and conventional energy is used for power generation. Simultaneously, the unit employs rectifier-inverter technology, and its design avoids the fixed relationship between the traditional generator output frequency and power speed. This allows the variable frequency motor 1 to adjust its power speed according to different loads, enabling better energy utilization and reducing conventional fuel consumption.

[0032] In energy storage mode, the primary method is to discharge the energy storage battery 6. Simultaneously, external photovoltaic or wind power modules supply power to the DC-DC control module, and the inverter 3 can supply power to external systems. The external photovoltaic or wind power modules can also charge the energy storage battery 6.

[0033] The above description of the embodiments is only used to provide a detailed introduction to the technical solution of this utility model. However, the description of the above embodiments is only for the purpose of helping to understand this utility model and should not be construed as a limitation of this utility model. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. An emergency power supply system, characterized by comprising: It includes: Variable frequency motor (1), starting control module (2), inverter (3), starting motor (4), power piece (5), energy storage battery (6); the output end of the variable frequency motor (1) and the input end of the inverter (3) are electrically connected, the rotor of the variable frequency motor (1) and the power piece (5) are drivingly connected; the starting control module (2) is respectively and the inverter (3), starting motor (4) communication connection, with energy storage battery (6) electrically connected; the inverter (3) is connected with energy storage battery (6) communication connection, with power piece (5) electrically connected; the starting motor (4) and energy storage battery (6) are electrically connected, and are drivingly connected with power piece (5).

2. The emergency power supply system of claim 1, wherein, The inverter (3) includes rectification and voltage stabilization module (31), DC-AC inverter module (32), DC-DC conversion module (33); the input end of the rectification and voltage stabilization module (31) and the output end of the variable frequency motor (1) are electrically connected, the DC-AC inverter module (32) and the DC-DC conversion module (33) are connected in parallel on the rectification and voltage stabilization module (31), the DC-AC inverter module (32) is connected with energy storage battery (6) communication.

3. The emergency power supply system of claim 1 or 2, wherein The inverter (3) is connected with mode selection module (7), and the mode selection module (7) is used for realizing the selection of emergency power supply system energy saving mode, hybrid mode, oil engine mode and energy storage mode.

4. The emergency power supply system of claim 3, wherein, The inverter (3) is connected with photovoltaic power generation module and / or wind power generation module.

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