CN-224204814-U - Emergency power supply system

CN224204814UCN 224204814 UCN224204814 UCN 224204814UCN-224204814-U

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 traction control module, an inverter, a power piece and an energy storage battery, wherein a rotor of the variable frequency motor is in transmission connection with the power piece, an output end of the variable frequency motor is electrically connected with an input end of the inverter, the reverse traction control module is respectively and communicatively connected with the variable frequency motor and the inverter, the inverter is respectively and electrically connected with the power piece and the energy storage battery, a generator can be started without starting the motor, starting current is low, and the problems that the generator is not loaded due to instantaneous overload and low in energy use efficiency can be solved.

Inventors

Xie anyuan
SHAO LIJUN
LUO HONG
Liu Zhangai
ZHANG JIE

Assignees

重庆安来动力机械有限公司

Dates

Publication Date: 20260505
Application Date: 20250310

Claims (4)

1. The emergency power supply system is characterized by comprising a variable frequency motor (1), a reverse dragging control module (2), an inverter (3), a power piece (4) and an energy storage battery (5), wherein a rotor of the variable frequency motor (1) is in transmission connection with the power piece (4), the output end of the variable frequency motor (1) is electrically connected with the input end of the inverter (3), the reverse dragging control module (2) is respectively and electrically connected with the variable frequency motor (1) and the inverter (3) and is in communication connection with the inverter (3), and the inverter (3) is respectively and electrically connected with the power piece (4) and the energy storage battery (5).
2. The emergency power supply system according to claim 1, wherein the inverter (3) comprises a rectifying and voltage stabilizing module (31), a DC-AC inversion module (32) and a DC-DC conversion module (33), wherein an input end of the rectifying and voltage stabilizing module (31) is electrically connected with an output end of the variable frequency motor (1), the rectifying and voltage stabilizing module (31) and the DC-AC inversion module (32) are connected in series, the DC-DC conversion module (33) is provided with three input and output ends, one input and output end is electrically connected with the energy storage battery (5), the other input and output end is electrically connected between the rectifying and voltage stabilizing module (31) and the DC-AC inversion module (32), the last input and output end is electrically connected with the DC-AC inversion module (32), and the inverse-dragging control module (2) is electrically connected between the rectifying and voltage stabilizing module (31) and the DC-DC conversion module (33).
3. Emergency power supply system according to claim 1 or 2, characterized in that the inverter (3) is connected with a mode selection module (6), the mode selection module (6) being used for realizing the selection of the energy saving mode, the hybrid mode and the oil engine mode of the emergency power supply system.
4. An emergency power supply system according to claim 3, characterized in that the inverter (3) is connected with a photovoltaic power generation module and/or a wind power generation module.

Description

Emergency power supply system Technical Field The utility model relates to the technical field of generators, in particular to an emergency power supply system. Background The generator (Generators) refers to a mechanical device that converts mechanical energy into electrical energy, and the energy generated by the power element is converted into mechanical energy, transmitted to the generator, and then converted into electrical energy by the generator. The power piece can be a water turbine taking water flow as a driving source, a steam turbine taking air flow as a driving source, a diesel engine taking fuel combustion as a driving source or other power machines. In the scene of household emergency electricity utilization, the generator adopts power to drive the power frequency generator to directly supply power to household loads. The generator needs to be provided with a battery and a starting motor, the battery supplies power to the starting motor, the starting motor drives the power piece to drag the generator to generate power, and the starting current of the battery is large. Meanwhile, the rotating speed of the traditional generator is fixed, and the rotating speed formula is F=P, wherein F represents the frequency of the generator, the unit is hertz (Hz), P represents the pole pair number of the generator, and N represents the rotating speed of the generator, and the unit is revolutions per minute (rpm). When a user selects a generator to use an electric load, the load cannot be generated by the instantaneous overload. And the efficiency of the generator running under different loads is different, and meanwhile, the generator needs to run all the time and wait, so the energy use efficiency of the generator is lower. Disclosure of utility model The utility model aims to solve the technical problems of no load and low energy use efficiency caused by instant overload of a generator, and provides an emergency power supply system which can start the generator without starting a motor and has small starting current. In order to solve the technical problems, the utility model provides the following technical scheme: The utility model provides an emergency power supply system which comprises a variable frequency motor, a reverse dragging control module, an inverter, a power piece and an energy storage battery, wherein a rotor of the variable frequency motor is in transmission connection with the power piece, the output end of the variable frequency motor is electrically connected with the input end of the inverter, the reverse dragging control module is respectively and electrically connected with the variable frequency motor and the inverter and is in communication connection with the inverter, and the inverter is respectively and electrically connected with the power piece and the energy storage battery. By adopting the technical scheme, the inverter can collect the rotating speed signal of the power piece and perform flameout control and speed regulation control on the power piece. The power piece can drag the variable frequency motor to rotate for power generation, and the variable frequency motor can reversely drag the power piece for starting. When the unit needs to be started, the inverter gives a starting signal to the anti-dragging control module, and the energy storage battery provides a driving power supply of the anti-dragging control module through the inverter. The anti-drag control module receives the control signal of the inverter and then drives the variable frequency motor to rotate, and when the anti-drag control module detects that the starting judgment rotating speed is reached, the anti-drag control module automatically cuts off the driving power supply of the magneto. The inverter can be provided with power supply for loads after the variable frequency motor generates power. The redundant electric quantity can be transmitted to an energy storage battery for storage. The energy storage battery can discharge, and the discharged direct current energy can enter the inverter to supply power to the load. And, the output of the inverter meets the output rated voltage requirement. In the process, the rectification inversion technology is adopted, so that the fixed relation between the working frequency of the traditional power generation output and the power rotating speed is avoided in design, different loads are used for adjusting different power rotating speeds, energy sources can be better utilized, and the traditional fuel consumption is reduced. The inverter comprises a rectification voltage stabilizing module, a DC-AC inversion module and a DC-DC conversion module, wherein the input end of the rectification voltage stabilizing module is electrically connected with the output end of the variable frequency motor, the rectification voltage stabilizing module is connected with the DC-AC inversion module in series, the DC-DC conversion module is provided with three input and output ends, o