Portable fuel generator capable of intelligently starting and stopping engine

Abstract

The invention relates to the field of generators, and particularly discloses a portable fuel generator capable of intelligently starting and stopping an engine. A controller of a traditional portable motor is improved, the functions of the controller are increased, a traditional three-phase alternating-current generator is changed into a motor through field-oriented control under the action of the controller, and therefore the fuel generator is electrically started; the portable fuel generator loaded with the improved controller has the functions of outputting power to the motor and converting electric power input by the motor into 220V alternating-current mains supply at the same time.

Description

Technical Field

[0001] The invention belongs to the technical field of generators, and in particular relates to a portable fuel generator with an intelligent start-stop engine. Background Art

[0002] Portable fuel generators are widely used in emergency power scenarios such as construction sites, outdoor activities, camping and home backup power supply, and are an indispensable part of people's lives. With the continuous improvement of the country's economic level and people's living standards, the market demand for fuel generators has increased year by year, and the market size has continued to expand.

[0003] Before the popularization of hydrogen fuel cells and the realization of controlled nuclear fusion, fuel generators are irreplaceable in the field of emergency power supply. Although fuel generators have certain disadvantages, such as loud noise and limited power, their advantages of high reliability, long battery life and long life are completely incomparable to new lithium-ion portable power supplies. Therefore, emergency power users will firmly choose fuel portable power supplies.

[0004] However, traditional portable fuel generators are generally started manually, which is inconvenient to use. Traditional portable fuel generators also have electric start models, but traditional electric start requires a starter motor, which increases the size of the fuel generator and the maintenance cost of the fuel generator. Summary of the invention

[0005] The object of the present invention is to provide a portable fuel generator with intelligent engine start-stop function to solve the problems mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A portable fuel generator with intelligent start-stop engine, comprising:

[0008] A motor, wherein the motor comprises a motor rotor, a motor stator and an angle sensor, and the motor stator comprises a single-phase alternating current coil and a three-phase alternating current coil;

[0009] An engine, the engine comprising a spark plug, a damper and a throttle;

[0010] A control panel, comprising a screen, a buzzer, buttons and LEDs;

[0011] A controller, wherein a plurality of control circuits are integrated inside the controller;

[0012] Accessories, including batteries, liquid level sensors, gasoline tanks, engine oil tanks, throttle stepper motors and throttle stepper motors.

[0013] Preferably, the controller includes a transformer circuit, a rectifier circuit, a FOC drive circuit, a stepper motor drive circuit, an analog signal sampling circuit, an inverter circuit, a main control circuit and a panel control circuit.

[0014] Preferably, the angle sensor reflects the motor rotor angle, and the controller reads the motor rotor rotation angle data through the angle sensor.

[0015] Preferably, when used as a generator, the motor outputs one 380V three-phase AC power and one 20V single-phase AC power. When used as a motor, the motor is driven by the FOC drive circuit of the controller in conjunction with the angle sensor.

[0016] Preferably, the start and stop of the spark plug of the engine is controlled by a control panel, and the damper and throttle are controlled by a damper stepping motor and a throttle stepping motor respectively.

[0017] Preferably, the controller is electrically connected to the control panel via a panel control circuit, receives signals from the control panel, and outputs status information to the control panel.

[0018] Preferably, the controller converts 380V three-phase AC power into DC power through a rectifier circuit, the controller converts 20V single-phase AC power into DC power and two floating voltages through a transformer circuit, and the controller converts the DC power converted from 380V three-phase AC power into 220V AC power again through an inverter circuit.

[0019] Preferably, the controller reads the battery voltage through an analog signal sampling circuit and charges the battery through a transformer circuit, the controller reads the liquid level sensor signal through an analog signal sampling circuit and displays the oil and gasoline levels on a control panel through a panel control circuit, the controller obtains the output AC power through an analog signal sampling circuit, and controls the throttle stepper motor and the throttle stepper motor according to the output AC power, thereby adjusting the opening size of the throttle and the throttle.

[0020] Preferably, the controller built-in software framework includes:

[0021] The rectifier output voltage stabilization drive module has a built-in closed-loop voltage stabilization algorithm. When the rectifier circuit output exceeds 380VDC, the rectifier circuit input is turned off, and the rectifier circuit input is turned on again when the voltage drops to within 380V.

[0022] Inverter drive module, with built-in inverter algorithm, calculates the SPWM signal that can convert 380V DC into 220V, 50Hz AC;

[0023] FOC drive module, with built-in FOC algorithm, is used to calculate the SVPWM signal that drives the motor to rotate in combination with the motor rotor angle read by the analog signal sampling circuit;

[0024] The stepper drive module has a built-in stepper algorithm, which is used to calculate the opening of the throttle and the throttle according to the calculated output power of 220V, 50Hz AC power, and drive the throttle stepper motor and the throttle stepper motor to rotate to the target angle;

[0025] Screen driver module, with built-in screen driver algorithm, used to display required images and information;

[0026] Signal processing module, with built-in signal sampling algorithm, processes analog signals through different sampling modes and filtering algorithms;

[0027] Human-computer interaction module, with built-in human-computer interaction algorithm, for logic processing of key operation and screen menu display;

[0028] The controller has a built-in timing processing system.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention improves the controller of a traditional portable motor and increases the function of the controller. Through the action of the controller, a traditional three-phase AC generator is converted into an electric motor through magnetic field oriented control, thereby electrically starting the fuel generator. The portable fuel generator equipped with the improved controller has the function of outputting power to the motor and converting the power input to the motor into 220V AC mains power. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a block diagram of the composition of the portable fuel generator of the present invention;

[0032] In the figure: 1. motor; 11. motor rotor; 12. motor stator; 13. angle sensor; 2. engine; 21. spark plug; 22. air door; 23. throttle; 3. control panel; 31. screen; 32. buzzer; 33. button; 34. LED; 4. controller; 41. voltage conversion circuit; 42. rectifier circuit; 43. FOC drive circuit; 44. stepper motor drive circuit; 45. analog signal sampling circuit; 46. inverter circuit; 47. main control circuit; 48. panel control circuit; 5. battery; 6. liquid level sensor; 7. gasoline tank; 8. engine oil tank; 9. air door stepper motor; 10. throttle stepper motor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example:

[0035] See also Figure 1 As shown, a portable fuel generator with intelligent start-stop engine includes:

[0036] A motor 1, wherein the motor 1 comprises a motor rotor 11, a motor stator 12 and an angle sensor 13, and the motor stator 12 comprises a single-phase AC coil and a three-phase AC coil;

[0037] The engine 2 is a fuel engine that converts the chemical energy of the fuel into kinetic energy. The engine 2 includes a spark plug 21, a damper 22, and a throttle 23. After the engine 2 is started, it can automatically suck in oil and air to run, and it will automatically stop running after the throttle 23 is closed;

[0038] A control panel 3, comprising a screen 31, a buzzer 32, a button 33 and an LED 34, for displaying the operation and status of the button 33 and outputting mains power;

[0039] A controller 4, wherein a plurality of control circuits are integrated inside the controller 4;

[0040] Accessories, the accessories include a battery 5, a liquid level sensor 6, a gasoline tank 7, an engine oil tank 8, a throttle stepper motor 9 and a throttle stepper motor 10, the battery 5 outputs electrical energy when starting, absorbs electrical energy after starting, and stops absorbing electrical energy after being fully charged, and the liquid level sensor 6 includes an engine oil level sensor and a fuel level sensor.

[0041] The controller 4 includes a voltage conversion circuit 41 , a rectifier circuit 42 , a FOC drive circuit 43 , a stepper motor drive circuit 44 , an analog signal sampling circuit 45 , an inverter circuit 46 , a main control circuit 47 and a panel control circuit 48 .

[0042] The angle sensor 13 reflects the angle of the motor rotor 11 , and the controller 4 reads the rotation angle data of the motor rotor 11 through the angle sensor 13 .

[0043] When used as a generator, the motor 1 outputs one 380V three-phase AC power and one 20V single-phase AC power. When used as a motor, the motor 1 is driven by the FOC drive circuit 43 of the controller 4 in cooperation with the angle sensor 13 .

[0044] The start and stop of the spark plug 21 of the engine 2 is controlled by the control panel 3, and the damper 22 and the throttle 23 are controlled by the damper stepping motor 9 and the throttle stepping motor 10 respectively.

[0045] The controller 4 is electrically connected to the control panel 3 via the panel control circuit 48 , receives signals from the control panel 3 , and outputs status information to the control panel 3 .

[0046] The controller 4 converts 380V three-phase AC power into DC power through a rectifier circuit 42, and converts 20V single-phase AC power into DC power and two floating voltages through a transformer circuit 41. The controller 4 converts the DC power converted from 380V three-phase AC power into 220V AC power again through an inverter circuit 46.

[0047] The transformer circuit 41 can convert 20V single-phase AC power into 20V DC power, and convert 20V DC power into two 16V floating voltages, one 16V ground voltage, one 12V DC power, one 5V DC power, and one 3.3V DC power. The DC power input from the battery is boosted to 36V as the power supply for the FOC drive circuit 43. The 20V DC power is used to charge the battery, 3.3V is used to power the MCU, 5V DC is used to power the optocoupler input end, 12V is used to power the transformer input circuit, and 16V DC is used to power the optocoupler output end, which is used to switch the inverter circuit 46 MOS tube.

[0048] The inverter circuit 46 controls the MOS tube switch through the SPWM signal output by the main control circuit 47 to convert the 380V DC power into 220V, 50Hz AC power.

[0049] The FOC driving circuit 43 controls the MOS tube switch according to the output SVPWM signal through the main control circuit 47, and converts the 36V DC power into the torque for driving the three-phase AC motor.

[0050] The controller 4 reads the voltage of the battery 5 through the analog signal sampling circuit 45, and charges the battery 5 through the transformer circuit 41. The controller 4 reads the signal of the liquid level sensor 6 through the analog signal sampling circuit 45, and displays the liquid levels of the engine oil and gasoline on the control panel 3 through the panel control circuit 48. The controller 4 obtains the output AC power through the analog signal sampling circuit 45, and controls the throttle stepper motor 9 and the throttle stepper motor 10 according to the output AC power, thereby adjusting the opening size of the throttle 22 and the throttle 23.

[0051] The controller 4 built-in software framework includes:

[0052] The rectifier output voltage stabilization drive module has a built-in closed-loop voltage stabilization algorithm. When the output voltage of the rectifier circuit 42 exceeds 380VDC, the input of the rectifier circuit 42 is turned off, and the input of the rectifier circuit 42 is turned on again when the voltage drops to within the range of 380V;

[0053] Inverter drive module, with built-in inverter algorithm, calculates the SPWM signal that can convert 380V DC into 220V, 50Hz AC;

[0054] The FOC drive module has a built-in FOC algorithm for calculating the SVPWM signal for driving the motor 1 to rotate in combination with the motor rotor 11 angle read by the analog signal sampling circuit 45;

[0055] The stepper drive module has a built-in stepper algorithm for calculating the opening of the damper 22 and the throttle 23 according to the calculated output power of the 220V, 50Hz AC power, and driving the damper stepper motor 9 and the throttle stepper motor 10 to rotate to the target angle;

[0056] Screen driver module, with built-in screen driver algorithm, used to display required images and information;

[0057] Signal processing module, with built-in signal sampling algorithm, processes analog signals through different sampling modes and filtering algorithms;

[0058] A human-computer interaction module, with a built-in human-computer interaction algorithm, for logic processing of key 33 operation and screen 31 menu display;

[0059] The controller 4 has a built-in timing processing system.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A portable fuel generator with intelligent start-stop engine, characterized in that: include: A motor (1), the motor (1) comprising a motor rotor (11), a motor stator (12) and an angle sensor (13), wherein the motor stator (12) comprises a single-phase alternating current coil and a three-phase alternating current coil; An engine (2), the engine (2) comprising a spark plug (21), a damper (22) and a throttle (23); A control panel (3), the control panel (3) comprising a screen (31), a buzzer (32), a button (33) and an LED (34); A controller (4), wherein a plurality of control circuits are integrated and arranged inside the controller (4); Accessories, the accessories comprising a battery (5), a liquid level sensor (6), a gasoline tank (7), an engine oil tank (8), a throttle stepping motor (9) and a throttle stepping motor (10).

2. A portable fuel generator with intelligent start-stop engine according to claim 1, characterized in that: The controller (4) comprises a voltage conversion circuit (41), a rectifier circuit (42), a FOC drive circuit (43), a stepper motor drive circuit (44), an analog signal sampling circuit (45), an inverter circuit (46), a main control circuit (47) and a panel control circuit (48).

3. A portable fuel generator with intelligent start-stop engine according to claim 2, characterized in that: The angle sensor (13) reflects the angle of the motor rotor (11), and the controller (4) reads the rotation angle data of the motor rotor (11) through the angle sensor (13).

4. The portable fuel generator with intelligent start-stop engine according to claim 3 is characterized by: When used as a generator, the motor (1) outputs a 380V three-phase alternating current and a 20V single-phase alternating current. When used as a motor, the motor (1) is driven by the FOC drive circuit (43) of the controller (4) in cooperation with the angle sensor (13).

5. The portable fuel generator with intelligent start-stop engine according to claim 4, characterized in that: The start and stop of the spark plug (21) of the engine (2) is controlled by a control panel (3), and the air door (22) and the throttle (23) are controlled by an air door stepping motor (9) and a throttle stepping motor (10) respectively.

6. A portable fuel generator with intelligent start-stop engine according to claim 5, characterized in that: The controller (4) is electrically connected to the control panel (3) via a panel control circuit (48), receives signals from the control panel (3), and outputs status information to the control panel (3).

7. A portable fuel generator with intelligent start-stop engine according to claim 6, characterized in that: The controller (4) converts 380V three-phase alternating current into direct current through a rectifier circuit (42), the controller (4) converts 20V single-phase alternating current into direct current and two floating voltages through a transformer circuit (41), and the controller (4) converts the direct current converted from the 380V three-phase alternating current into 220V mains power again through an inverter circuit (46).

8. The portable fuel generator with intelligent start-stop engine according to claim 7, characterized in that: The controller (4) reads the voltage of the battery (5) through the analog signal sampling circuit (45), and charges the battery (5) through the voltage conversion circuit (41); the controller (4) reads the signal of the liquid level sensor (6) through the analog signal sampling circuit (45), and displays the liquid levels of the engine oil and gasoline on the control panel (3) through the panel control circuit (48); the controller (4) obtains the output AC power through the analog signal sampling circuit (45), and controls the air door stepping motor (9) and the throttle stepping motor (10) according to the output AC power, thereby adjusting the opening size of the air door (22) and the throttle (23).

9. The portable fuel generator with intelligent start-stop engine according to claim 8, characterized in that: The controller (4) has a built-in software framework including: The rectifier output voltage stabilization drive module has a built-in closed-loop voltage stabilization algorithm. When the output voltage of the rectifier circuit (42) exceeds 380VDC, the input of the rectifier circuit (42) is turned off, and the input of the rectifier circuit (42) is turned on again when the voltage drops to within the range of 380V; Inverter drive module, with built-in inverter algorithm, calculates the SPWM signal that can convert 380V DC into 220V, 50Hz AC; A FOC drive module, having a built-in FOC algorithm, for calculating a SVPWM signal for driving the motor (1) to rotate in combination with the motor rotor (11) angle read by the analog signal sampling circuit (45); The stepping drive module has a built-in stepping algorithm for calculating the opening of the air door (22) and the throttle (23) according to the calculated output power of the 220V, 50Hz alternating current, and driving the air door stepping motor (9) and the throttle stepping motor (10) to rotate to a target angle; Screen driver module, with built-in screen driver algorithm, used to display required images and information; Signal processing module, with built-in signal sampling algorithm, processes analog signals through different sampling modes and filtering algorithms; A human-computer interaction module, with a built-in human-computer interaction algorithm, for logic processing of key (33) operation and screen (31) menu display; The controller (4) has a built-in timing processing system.

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