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 reverse dragging control module, an inverter, an energy storage inverter, 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, and the reverse dragging control module is electrically connected with the variable frequency motor, the inverter and the energy storage battery. The inverter is electrically connected with the power part and the energy storage inverter and is in communication connection with the energy storage inverter; the energy storage inverter is electrically connected with the energy storage battery, the output end of the energy storage inverter is electrically connected with the output end of the inverter, the generator can be started without starting the motor, the starting current is small, and the problem of low 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. The battery powers the starter motor, which in turn drives the generator to produce electricity. Batteries have a large starting current. 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). Generators operate at varying efficiency under different loads and need to run continuously, 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 start a generator without starting a motor, has a small starting current, and can solve the problem of 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 reverse drag control module, an inverter, an energy storage inverter, 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, the rotor of the variable frequency motor and the power component are drively connected, the reverse drag control module is electrically connected to the variable frequency motor, the inverter, and the energy storage battery respectively; the inverter is electrically connected to the power component and the energy storage inverter, and is communicatively connected to the energy storage inverter; the energy storage inverter and the energy storage battery are electrically connected, and the output terminal of the energy storage inverter is electrically connected to the output terminal of the inverter.

[0007] By adopting the above technical solution, the inverter can collect the speed signal and shutdown information of the power components and control their speed. The power components can drive the variable frequency motor to generate electricity, and the variable frequency motor can drive the power components in reverse to start them. It can start the generator without a starter motor or a separate starting battery, and the starting current is low. The variable frequency motor can provide AC power to the inverter, and both the inverter and the energy storage inverter meet the rated output voltage requirements. After receiving the control signal from the inverter, the reverse drive control module can drive the variable frequency motor to rotate. When the reverse drive control module detects that the starting speed has been reached, it automatically disconnects the variable frequency motor drive power. When the unit needs to be started, the inverter sends a start signal to the reverse drive control module, and the energy storage battery provides power to the reverse drive control module. The inverter can charge the energy storage inverter. Simultaneously, the energy storage inverter can also charge the energy storage battery, and the energy storage battery can also discharge to the energy storage inverter. Furthermore, when the energy storage inverter directly outputs DC power to the load, it meets the rated voltage requirements, preventing power waste and effectively solving the problem of low energy efficiency.

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

[0009] By adopting the above technical solution, the variable frequency motor can provide AC power to the inverter's rectifier and voltage regulator module. After rectification by the rectifier and voltage regulator module, DC power is output, which is then inverted by the DC-AC inverter module to provide AC power. Both the inverter and the energy storage inverter meet the rated output voltage requirements. Simultaneously, the energy storage inverter can also output DC power to the DC-AC inverter module for inversion and AC power supply.

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

[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 a variable frequency motor, reverse drag control module, inverter, energy storage inverter, power components, and energy storage battery, enables the generator to be started without a starter motor, with a low starting current, and solves the problem of low 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. Reverse drive control module; 3. Inverter; 31. Rectifier and voltage regulator module; 32. DC-AC inverter module; 4. Energy storage inverter; 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 The emergency power supply system includes: 1. Variable frequency motor, 2. Reverse drag control module, 3. Inverter, 4. Energy storage inverter, 5. Power components, and 6. Energy storage battery.

[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 reverse drag control module 2 is electrically connected to the variable frequency motor 1, the inverter 3, and the energy storage battery 6. The inverter 3 is also electrically connected to the power component 5 and the energy storage inverter 4, and has a communication connection with the energy storage inverter 4. The output terminal of the inverter 3 can supply power to the load. The energy storage inverter 4 is also electrically connected to the energy storage battery 6, and the output terminal of the energy storage inverter 4 is electrically connected to the output terminal of the inverter 3.

[0023] refer to Figure 1 Inverter 3 includes a rectifier and voltage regulator module 31 and a DC-AC inverter module 32. 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 rectifier and voltage regulator module 31 and the DC-AC inverter module 32 are connected in series. 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 to supply power. An energy storage inverter 4 is electrically 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 electrically connected to the output terminal of the DC-AC inverter module 32.

[0024] In the aforementioned emergency power system, inverter 3 can acquire 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 rotate and generate electricity. Variable frequency motor 1 can drive power component 5 in reverse to start it. It can start the generator without a starter motor and does not require a separate starting battery, and the starting current is small. Variable frequency motor 1 can provide AC power to the rectifier and voltage regulator module 31 of inverter 3. After rectification by the rectifier and voltage regulator module 31, DC power is output, which is then inverted by the DC-AC inverter module 32 to provide AC power. Inverter 3 and energy storage inverter 4 meet the rated output voltage requirements.

[0025] After receiving the control signal from the inverter 3, the reverse drag control module 2 can drive the variable frequency motor 1 to rotate. When the reverse drag control module 2 detects that the starting speed has been reached, it automatically disconnects the drive power to the variable frequency motor 1. When the unit needs to be started, the inverter 3 sends a start signal to the reverse drag control module 2, and the energy storage battery 6 provides power to the reverse drag control module 2. Since the inverter 3 communicates with the energy storage inverter 4, the inverter 3 can charge the energy storage inverter 4. At the same time, the energy storage inverter 4 can also charge the energy storage battery 6, and the energy storage battery 6 can also discharge to the energy storage inverter 4. When the energy storage inverter 4 directly outputs DC power to the load, it meets the rated voltage requirements. The energy storage inverter 4 can also output DC power to the DC-AC inverter module 32 for inversion and to provide inverted DC power.

[0026] refer to Figure 1Inverter 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 three modes for home emergency power use, selectable via mode selection module 7: energy-saving mode, hybrid mode, and generator mode. Customers can choose the appropriate mode based on their specific application scenario.

[0027] Specifically, in the energy-saving mode, this scenario primarily uses the energy storage inverter 4 to supply power to the load. The energy storage inverter 4 communicates the load size and the charge level of the energy storage battery 6 to the inverter 3. When the load is too high, an alarm is triggered, the output is shut down, and an alarm is issued. When the discharge charge drops to the set alarm value, the energy storage inverter 4 issues an alarm and communicates with the inverter 3. The inverter 3 controls the reverse drag control module 2, which drives the variable frequency motor 1, causing the power unit 5 to start. At this time, the power unit 5 reverse-drives the variable frequency motor 1 to rotate, and the inverter 3 switches to using generator power to supply the load, with excess power charging the energy storage battery 6. When the energy storage battery 6 reaches the set protection point, the energy storage inverter 4 communicates with the generator set to switch the load output. The energy storage inverter 4 then carries the load output, while the inverter 3 controls the generator set to stop, continuing the cycle of this mode function, thus controlling the generator set to its maximum efficiency point. This better utilizes energy and reduces traditional fuel consumption.

[0028] 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. However, using this patented technology, a 10KW generator and a 10KW energy storage inverter can be configured.

[0029] In generator mode, the functions of a traditional generator are retained, generating electricity using conventional energy sources. Simultaneously, the unit employs rectifier-inverter technology, designed to avoid 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.

[0030] 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), anti-drag control module (2), inverter (3), energy storage inverter (4), power component (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 component (5) are drivingly connected, the anti-drag control module (2) is electrically connected with the variable frequency motor (1), the inverter (3) and the energy storage battery (6) respectively; the inverter (3) is electrically connected with the power component (5) and the energy storage inverter (4), and is in communication connection with the energy storage inverter (4); the energy storage inverter (4) is electrically connected with the energy storage battery (6), and the output end of the energy storage inverter (4) is electrically connected with the output end of the inverter (3).

2. The emergency power supply system of claim 1, wherein, The inverter (3) includes a rectification voltage stabilizing module (31) and a DC-AC inverter module (32) connected in series; the rectification voltage stabilizing module (31) is electrically connected with the output end of the variable frequency motor (1), the energy storage inverter (4) is electrically connected between the rectification voltage stabilizing module (31) and the DC-AC inverter module (32), and the output end of the energy storage inverter (4) is electrically connected with the output end of the DC-AC inverter module (32).

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

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

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