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 unit starting module, an inverter, an energy storage inverter, a starting motor, a power piece and an energy storage battery, a rotor of the variable frequency motor is in transmission connection with the power part; the output end of the variable frequency motor is electrically connected with the input end of the inverter; the unit starting module is electrically connected with the inverter, the starting motor and the energy storage battery. The inverter is electrically connected with the energy storage inverter and the power part and is in communication connection with the energy storage inverter; the energy storage inverter is electrically connected with the energy storage battery and the output end of the inverter; the starting motor is electrically connected with the energy storage battery and is in transmission connection with the power piece, and the problems that a battery is single in function and low in energy use efficiency can be solved.

Description

Technical Field

[0001] This utility model relates to the technical field of generators, and more 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 rotational 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 rotational speed in revolutions per minute (rpm). Generator efficiency varies under different loads, and since generators need to run continuously while waiting, their energy utilization efficiency is relatively low. 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 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 unit starting module, an inverter, an energy storage inverter, a starter motor, a power component, and an energy storage battery; the rotor of the variable frequency motor is driven by the power component, and the output end of the variable frequency motor is electrically connected to the input end of the inverter; the unit starting module is electrically connected to the inverter, the starter motor, and the energy storage battery respectively; the inverter is electrically connected to the energy storage inverter and the power component, and is communicatively connected to the energy storage inverter; the energy storage inverter is electrically connected to the energy storage battery and the output end of the inverter; the starter motor is electrically connected to the energy storage battery and is driven by the power component.

[0007] By adopting the above technical solution, the energy storage battery supplies power to the starter motor. Under the control of the generator starter module, the starter motor can provide power to the power components for starting, so that the power components can drive the variable frequency motor to generate electricity. When the emergency power system is started, the inverter can provide AC power, and the inverter output meets the rated output voltage requirements. At the same time, the AC power output from the rectifier and voltage regulator module can be stored after being inverted by the energy storage inverter, and then used to power household appliances through the energy storage inverter. The energy storage inverter output meets the rated output voltage requirements, and the inverter and energy storage inverter can output power in parallel. When the energy storage inverter has excess power, it can charge the energy storage battery, which can then store the energy, thus eliminating the need for external charging lines. When the energy storage battery discharges, it outputs DC power, which can be discharged externally through the energy storage inverter, or discharged externally through the energy storage inverter and then through the inverter. The DC power output from the energy storage battery can also be used to supply power to the generator starter module. Therefore, the generator has higher energy efficiency and can effectively solve the problem of the battery's single function.

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

[0009] By adopting the above technical solution, the rectifier and voltage regulator module, together with the DC-AC inverter module, can provide an inverter DC power supply, and the inverter output meets the rated output voltage requirements.

[0010] Optionally, the inverter is connected to a mode selection module, which is used to select between the energy-saving mode, hybrid mode, and generator 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, this utility model has at least the following beneficial technical effects:

[0015] This emergency power system, through the coordinated operation of variable frequency motors, unit starting modules, inverters, energy storage inverters, starter motors, power components, and energy storage batteries, enables the multi-functional use of batteries and 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. Unit starting module; 3. Inverter; 31. Rectifier and voltage regulator module; 32. DC-AC inverter module; 4. Energy storage inverter; 5. Starter motor; 6. Power component; 7. Energy storage battery; 8. 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 unit starting module 2, an inverter 3, an energy storage inverter 4, a starter motor 5, a power component 6, and an energy storage battery 7.

[0022] The rotor of the variable frequency motor 1 is driven by the power component 6, and the output terminal of the variable frequency motor 1 is electrically connected to the input terminal of the inverter 3. The unit starting module 2 is electrically connected to the inverter 3, the starter motor 5, and the energy storage battery 7. The inverter 3 is also electrically connected to the energy storage inverter 4 and the power component 6, and has a communication connection with the energy storage inverter 4. The output terminal of the inverter 3 can be connected to the load to provide power. The energy storage inverter 4 is also electrically connected to the energy storage battery 7 and the output terminal of the inverter 3. The starter motor 5 is also electrically connected to the energy storage battery 7 and is driven by the power component 6.

[0023] Inverter 3 includes a rectifier and voltage regulator module 31 and a DC-AC inverter module 32, which are connected in series. The input terminal of the rectifier and voltage regulator module 31 serves as the input terminal of inverter 3 and is electrically connected to the output terminal of the variable frequency motor 1. The output terminal of the DC-AC inverter module 32 serves as the output terminal of inverter 3 and can be connected to the load for power supply. The input terminal of energy storage inverter 4 is connected between the rectifier and voltage regulator module 31 and the DC-AC inverter module 32, and the output terminal of energy storage inverter 4 is connected to the output terminal of DC-AC inverter module 32.

[0024] In the aforementioned emergency power system, inverter 3 can acquire the speed signal of power component 6 and perform shutdown and speed control on power component 6. Power component 6 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). Since the aforementioned speed control can achieve the purpose of adjusting the speed of variable frequency motor 1, energy efficiency can be improved.

[0025] When the emergency power system needs to be activated, the energy storage battery 7 supplies power to the starter motor 5. Under the control of the unit start-up module 2, the starter motor 5 provides power to the power unit 6 for starting, so that the power unit 6 can drive the variable frequency motor 1 to generate electricity. After the emergency power system is activated, the rectifier and voltage regulator module 31 rectifies the AC power generated by the variable frequency motor 1 into DC power, which is then inverted by the DC-AC inverter module to provide inverted DC power. The output of the inverter 3 meets the rated output voltage requirements. At the same time, the DC power output by the rectifier and voltage regulator module 31 can be inverted and stored by the energy storage inverter 4, and then used to power household appliances. The output of the energy storage inverter 4 meets the rated output voltage requirements. It should be understood that the DC-AC inverter module 32 and the energy storage inverter 4 can supply power simultaneously, realizing parallel output.

[0026] When the energy storage inverter 4 has excess power, it can charge the energy storage battery 7, which can then store the energy, eliminating the need for external charging lines. When discharging, the energy storage battery 7 outputs DC power, which can be directly discharged through the energy storage inverter 4, or it can be discharged as AC power through the DC-AC inverter module 32 after passing through the energy storage inverter 4. The DC power output from the energy storage battery 7 can also be used to power the unit startup module 2. This connection method for the energy storage battery 7 effectively solves the problem of the battery having a single function.

[0027] Inverter 3 is connected to mode selection module 8, and can also connect to photovoltaic power generation modules and / or wind power generation modules. The emergency power system can operate in three modes for home emergency power needs, selectable via mode selection module 8: energy-saving mode, hybrid mode, and generator mode. Customers can choose the appropriate mode based on their specific application scenario.

[0028] Specifically, in the energy-saving mode, the energy storage inverter 4 primarily supplies power to the load. When the load is too high, an alarm is triggered, and the output is shut down. When the discharge level drops to the set alarm value, the energy storage inverter 4 issues an alarm and communicates with inverter 3. Inverter 3 then sends a start control signal. Upon detecting the start signal, the generator start module 2 starts the variable frequency motor 1. After the variable frequency motor 1 runs smoothly, it switches the load output, and the energy storage inverter 4 shuts down its output. The variable frequency motor 1 then carries the load output, and simultaneously, it charges the energy storage battery 7 through the energy storage inverter 4. When the energy storage battery 7 reaches the set protection point, inverter 3 communicates with the energy storage inverter 4 to switch the load output. The energy storage inverter 4 then carries the load output, and inverter 3 controls the variable frequency motor 1 to stop, continuing the cycle of this mode. This controls the generator set to its maximum efficiency point while preventing the generator set from running continuously. This improves energy utilization and reduces traditional fuel consumption.

[0029] In hybrid mode, the output power is superimposed. This invention illustrates this: For example, an X-kW generator is configured with Y-kW energy storage. The system can support a (X+Y)-kW load. This configuration can provide high-power equipment exceeding the generator's rated power, improving the unit's operating efficiency and economy. For instance, if a customer needs 20kW of electrical equipment, a normal configuration would require a 20kW generator. Using this patented technology, a 10kW generator and a 10kW energy storage inverter can be configured.

[0030] In generator mode, the functions of a traditional generator are retained, using conventional energy sources 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 for adjusting the power output speed to suit different loads, resulting in better energy utilization and reduced consumption of conventional fuels.

[0031] 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 in that, include: The generator set includes a variable frequency motor (1), a generator start-up module (2), an inverter (3), an energy storage inverter (4), a starter motor (5), a power component (6), and an energy storage battery (7). The rotor of the variable frequency motor (1) is connected to the power component (6) via a drive, and the output end of the variable frequency motor (1) is electrically connected to the input end of the inverter (3). The generator start-up module (2) is electrically connected to the inverter (3), the starter motor (5), and the energy storage battery (7) respectively. The inverter (3) is electrically connected to the energy storage inverter (4) and the power component (6), and is also connected to the energy storage inverter (4) via a communication connection. The energy storage inverter (4) is electrically connected to the energy storage battery (7) and the output end of the inverter (3). The starter motor (5) is electrically connected to the energy storage battery (7) and is connected to the power component (6) via a drive.

2. The emergency power supply system as described in claim 1, characterized in that, The inverter (3) includes a rectifier and voltage regulator module (31) and a DC-AC inverter module (32); the rectifier and voltage regulator module (31) and the DC-AC inverter module (32) are connected in series, the input terminal of the rectifier and voltage regulator module (31) is electrically connected to the output terminal of the variable frequency motor (1), the input terminal of the energy storage inverter (4) is connected between the rectifier and voltage regulator module (31) and the DC-AC inverter module (32), and the output terminal of the energy storage inverter (4) is connected to the output terminal of the DC-AC inverter module (32).

3. The emergency power supply system as described in claim 1 or 2, characterized in that, The inverter (3) is connected to a mode selection module (8), which is used to select the emergency power system's energy-saving mode, hybrid mode, and generator mode.

4. The emergency power supply system as described in claim 3, characterized in that, The inverter (3) is connected to a photovoltaic power generation module and / or a wind power generation module.

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