Intelligent generator set capable of being automatically adjusted to adapt to multi-voltage output

Abstract

The utility model belongs to the technical field of generator sets, and particularly discloses an intelligent generator set capable of automatically adjusting and adapting to multi-voltage output, which comprises an engine, a generator, a voltage regulator, a set control screen, an electronic control unit, an integrated motor winding multi-position automatic conversion device and an output circuit breaker, the engine drives the generator to generate electricity, the voltage regulator is connected with the excitation current control end of the generator, a voltage selection switch and a frequency selection switch are arranged on the unit control screen, and the output end of the voltage selection switch is connected with the control end of an electric motor of the integrated motor winding multi-position automatic conversion device. The output end of the frequency selection switch is connected with the electronic control unit, the output end of the electronic control unit is connected with the engine rotating speed control end, and the output circuit breaker is arranged on an output circuit of the generator. By adopting the technical scheme, the generator winding connection structure can be automatically arranged and combined through the unit control screen and the integrated motor winding multi-position automatic conversion device, and various voltage outputs are realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of generator sets, and relates to an intelligent generator set capable of automatically adjusting and adapting to multiple voltage outputs. Background Art

[0002] Three-phase AC generator set refers to a device that uses a power source to mechanically drive a three-phase AC generator to supply power. In most cases, the three-phase AC generator set is used as a backup emergency power supply. When the city power is interrupted, the internal combustion engine is started to drive the synchronous AC generator to supply power to ensure that the AC power supply is not interrupted for a long time. In a few cases, such as where the city power cannot be connected, it is used as the main power supply.

[0003] Conventional three-phase AC generator sets are widely used, but they also have certain limitations. In some special industries, such as foreign leasing companies renting generator sets to factories, the factories use various imported equipment, and these equipment may come from different countries, and their working voltages and frequencies are different; for example, international hotels must have emergency power supplies, and the hotel may accommodate guests from multiple countries, and they bring their own electrical appliances. These hotels also need to provide sockets with different voltage levels and frequencies for guests to use; there are also some international conferences, sports games and other occasions. If each voltage level is equipped with a generator set, it will inevitably greatly increase the equipment cost.

[0004] To solve the above-mentioned problem of multi-voltage output, the following methods are generally used:

[0005] 1. Lead the winding lead-out wires from the motor terminal board to the distribution cabinet, and rearrange and combine them. For example, if a 6-winding motor is used, different voltages can be obtained by combining Y-type parallel, Y-type series, △-type parallel, and all parallel methods.

[0006] 2. Divide the winding into several sections in proportion and tap out the leads, and use the proportional voltage. For example, if one winding is 440V, tap out its center position to get 220V.

[0007] The unit controller does not have multiple sets of independently set protection parameters, and does not perform relevant protection under different voltage conditions. It is necessary to manually judge whether the voltage is normal for processing.

[0008] The traditional motor terminal block only has the function of wiring the motor winding lead-out terminal. If the tap needs to be recombined, the cable is led out from the motor terminal block to the external distribution box with a cable. Otherwise, the operation will be very inconvenient in the small space inside the motor transfer box, and the tap cannot have a sufficient conversion length. Even after being led out to the distribution box, manual conversion will cause a huge waste of manpower, material resources, and energy. The winding leads out the tap in proportion to take part of the voltage, the winding current remains unchanged, and the voltage is reduced, which will cause a corresponding loss of power. There is no relevant protection under different voltages. If the personnel are not on site when a problem occurs, it cannot be automatically protected. Utility Model Content

[0009] The utility model aims to provide an intelligent generator set which can automatically adjust and adapt to multiple voltage outputs to achieve multiple voltage outputs.

[0010] In order to achieve the above-mentioned purpose, the basic scheme of the utility model is: an intelligent generator set that automatically adjusts to adapt to multiple voltage outputs, including an engine, a generator, a voltage regulator, a unit control panel, an electronic control unit, an integrated motor winding multi-position automatic conversion device and an output circuit breaker;

[0011] The engine is used to drive the generator to generate electricity;

[0012] The voltage regulator is connected to the generator excitation current control terminal, and the generator output voltage is regulated by controlling the generator excitation current;

[0013] The unit control panel is provided with a voltage selection switch and a frequency selection switch. The output end of the voltage selection switch is connected to the control end of the electric motor of the integrated motor winding multi-position automatic conversion device, and the electric motor is used to switch the connection mode of the generator winding lead tap, thereby realizing the adjustment of the output voltage; the output end of the frequency selection switch is connected to the input end of the electronic control unit, and the output end of the electronic control unit is connected to the engine speed control end, thereby controlling the generator frequency;

[0014] The integrated motor winding multi-position automatic switching device is installed in the generator junction box and is used to switch the connection mode of the generator winding lead tap;

[0015] The output circuit breaker is arranged on the output path of the generator and is used to switch the electric energy of the generator on and off.

[0016] The working principle and beneficial effects of this basic solution are as follows: the unit control panel is equipped with a voltage conversion switch and a frequency conversion switch, which can control the integrated motor winding multi-position automatic conversion device to switch different winding tap connection methods, such as Y-type series connection, △-type series connection, △-type parallel connection, and all parallel connection, to achieve different voltage outputs, control the electronic control unit (ECU) to adjust the speed, and feedback to the unit control panel to match multiple sets of independent and configurable generator and engine parameter protection at the corresponding position. The voltage regulator can adjust / fine-tune the generator output voltage in a small range, and the generator output voltage can be adjusted in a large range by switching the generator winding lead taps through the electric motor.

[0017] Furthermore, the unit control panel is also provided with a cloud service module, a GPRS antenna and a GPS module;

[0018] The cloud service module transmits data to the cloud server via the GPRS antenna and GPS module, and the user operation terminal can be connected to the cloud server.

[0019] The user operation terminal can view the information data of the cloud service module through the cloud server, which is convenient for remote viewing and operation. The installation of cloud service can remotely monitor the operating status, power generation, fuel consumption of the unit, and can also remotely control and lock the unit. This function is very suitable for the rental industry.

[0020] Furthermore, the unit control panel is connected to the integrated motor winding multi-position automatic conversion device through a control cable, and the voltage selection switch of the unit controller switches the gear, issues instructions to control the operation of the electric motor of the integrated motor winding multi-position automatic conversion device, switches different winding tap connection structures, and realizes different voltage outputs.

[0021] The connection structure through the control cable is simple and easy to use. The voltage selection switch is used to control the voltage of the integrated motor winding multi-position automatic conversion device, which is easy to operate. The integrated motor winding multi-position automatic conversion device includes a DC motor as an actuator. The voltage selection switch switches different positions to provide control power. The built-in limit switch of the conversion device is used to realize electric switching to different positions. After the limit switch is actuated, the motor power supply is disconnected.

[0022] Furthermore, the unit control panel is connected to the electronic control unit via a control cable, and the frequency selection switch of the unit controller switches the gear position, and issues a command to adjust the engine speed via CAN communication to achieve 50 / 60HZ switching.

[0023] The frequency selection switch is used to control the engine speed and thus the motor frequency, which is easy to operate. Furthermore, the integrated motor winding multi-position automatic conversion device includes a first actuator, a second actuator, a first terminal, a second terminal, an output terminal and a conversion static contact;

[0024] The actuator includes a moving contact, a push rod, a nut, a limit module, a screw, a reduction gear set, a micro DC motor and a control terminal;

[0025] The moving contact is connected to the push rod, the push rod is connected to the nut, the nut is connected to the limit module and is sleeved on the screw rod through a screw, the screw rod is connected to the reduction gear set, the reduction gear set is connected to the micro DC motor, and the micro DC motor is connected to the control terminal;

[0026] The limit module is set with three positions, corresponding to the I position, 0 position and II position of the conversion static contact respectively. The first terminal is connected to T2 / T3, T6 / T7, T10 / T11 of the motor stator winding lead wire; the second terminal is connected to T4, T8, T12 of the motor stator winding lead wire; the output terminal is connected to T1, T5, T9, N of the motor stator winding lead wire; the positions of T1, T5, T9 and N are fixed.

[0027] When the control terminal receives external control power, the micro DC motor starts to operate and drives the reduction gear set. After deceleration, the torque increases, driving the screw to rotate, thereby driving the nut, screw, and moving contact to move horizontally. After the moving contact is operated, the contact position of the static contact is switched. When the nut moves to a certain position, it touches the limit module and stops. The limit module is set to three positions, corresponding to the I position, 0 position, and II position of the static contact.

[0028] Furthermore, when the first actuator is in position 0 and the second actuator is in position II, the voltage conversion switch is at -60°, T2 is connected to T3, T6 is connected to T7, T10 is connected to T11, T4 is connected to T8 and T12 and is led to the device output terminal N, and is led out from T1, T5, T9, and N as U, V, W, and N respectively, forming a three-phase four-wire series Y-type connection structure.

[0029] The three-phase four-wire series Y-type connection structure can also be used as AC690V three-phase four-wire power generation output after the voltage is adjusted in a small range by the automatic voltage regulator (AVR).

[0030] Furthermore, when the first actuator is in position 0 and the second actuator is in position 1, the voltage conversion switch is at -30°, T2 is connected to T3, T6 is connected to T7, T10 is connected to T11, T1 is connected to T12, T4 is connected to T5, and T8 is connected to T9, and U, V, and W are respectively drawn from T1, T5, and T9 to form a three-phase series △ connection structure.

[0031] The three-phase series △-type connection structure can also be used as AC400V three-phase power output after the voltage is adjusted in a small range by AVR.

[0032] Furthermore, when the first actuator 1 is in position I and the second actuator is in position 0, the voltage conversion switch is at 30°, T1 is connected to T4, T10, and T11, T2 is connected to T3, T5, and T8, and T6 is connected to T7, T9, and T12, and U, V, and W are respectively drawn from T1, T5, and T9 to form a three-phase parallel △-type connection structure.

[0033] If the single winding is 220V, the output voltage = 220V, and the three-phase parallel △ connection structure can be used as AC220V three-phase power generation output.

[0034] Furthermore, when the first actuator is in position II and the second actuator is in position I, the voltage conversion switch is at 60°, T1 is connected to T4, T5, T8, T9, and T12, T2 is connected to T3, T6, T7, T10, and T11 and is led to the output terminal N of the device, and T1 and N are led out as U (L) and neutral lines, which can form a full parallel connection structure.

[0035] If the single winding is 220V, the output voltage = 220V, and the full parallel connection structure can be used as AC220V single-phase power generation output.

[0036] Furthermore, it also includes a battery, which is connected to the unit control panel and the integrated motor winding multi-position automatic conversion device respectively.

[0037] The unit is started by a battery and switched by an integrated motor winding multi-position automatic switching device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of the intelligent generator set of the utility model which automatically adjusts and adapts to multiple voltage outputs;

[0039] Figure 2 It is a structural schematic diagram of a control panel of an intelligent generator set that automatically adjusts and adapts to multiple voltage outputs according to the utility model;

[0040] Figure 3 It is a structural schematic diagram of an integrated motor winding multi-position automatic conversion device of an intelligent generator set that automatically adjusts and adapts to multiple voltage outputs;

[0041] Figure 4 It is a schematic diagram of a three-phase four-wire series Y-type connection structure of an integrated motor winding multi-position automatic conversion device of an intelligent generator set that automatically adjusts and adapts to multiple voltage outputs of the utility model;

[0042] Figure 5 It is a schematic diagram of a three-phase series △-type connection structure of an integrated motor winding multi-position automatic conversion device of an intelligent generator set that automatically adjusts and adapts to multiple voltage outputs of the utility model;

[0043] Figure 6 It is a schematic diagram of a three-phase parallel △-type connection structure of an integrated motor winding multi-position automatic conversion device of an intelligent generator set that automatically adjusts and adapts to multiple voltage outputs of the utility model;

[0044] Figure 7 The utility model is a schematic diagram of the full parallel connection structure of the integrated motor winding multi-position automatic conversion device of the intelligent generator set which automatically adjusts and adapts to multiple voltage outputs.

[0045] The reference numerals in the drawings of the specification include: 1 base, 2 water tank, 3 engine, 4 electronic control unit, 5 generator, 6 voltage regulator, 7 unit control panel, 8 integrated motor winding multi-position automatic conversion device, 9 output circuit breaker;

[0046] 711 display screen, 712 operation button, 713 voltage selection switch, 714 frequency selection switch, 715 wiring terminal, 716 chip circuit board, 717 cloud service module, 718 GPRS antenna, 719 GPS module, 720 cloud server, 721 user operation terminal;

[0047] 81 first actuator, 82 second actuator, 83 first terminal, 84 second terminal, 85 output terminal, 86 conversion static contact, 820 moving contact, 821 push rod, 822 nut, 823 limit module, 824 screw, 825 reduction gear set, 826 micro DC motor, 827 control terminal. DETAILED DESCRIPTION

[0048] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0049] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0051] The utility model discloses an intelligent generator set which can automatically adjust and adapt to multiple voltage outputs, such as Figure 1 As shown, it includes an engine 3 (such as Cummins QSK19-G4 50 / 60HZ 1500 / 1800 rpm dual-frequency engine, etc.), a generator 5 (such as Stanford X23E191623, etc.), a voltage regulator 6 (such as Stanford SX440, etc.), a unit control panel 7 (such as Huali Electromechanical HLK-400, etc.), an electronic control unit 4 (such as Cummins ECU-CM850, etc.), an integrated motor winding multi-position automatic conversion device 8 (such as Huali Electromechanical DJZH-01, etc.) and an output circuit breaker 9 (such as Schneider MVS10N3F202, etc.).

[0052] The water tank 2 is fixedly installed (such as welding, bonding, riveting, screw connection, etc.) at one end of the base 1, the generator 5 is fixedly installed at the other end of the base 1, the engine 3 is placed in the middle of the base 1, and the water tank 2 is connected to the engine 3. The engine 3 is used to drive the generator 5 to generate electricity, and the voltage regulator 6 is installed on the side plate of the generator 5. The voltage regulator 6 (AVR) is electrically connected to the excitation current control end of the generator 5, and the output voltage of the generator 5 is adjusted by controlling the excitation current of the generator 5.

[0053] The unit control panel 7 is arranged above the generator 5, and the unit control panel 7 is provided with a voltage selection switch 713 (such as Suzhou Siemens LW39-16A-3KB / 6, including -60°, -30°, 0°, 30°, 60°, a total of 5 angle positions) and a frequency selection switch 714 (such as Shanghai Ergong LW39-16A-4OA / 6, a total of -45°, 0°, 45°, 3 angle positions), the output end of the voltage selection switch 713 is electrically connected to the control end of the electric motor of the integrated motor winding multi-position automatic conversion device 8, and the electric motor is used to switch the connection mode of the generator 5 winding lead tap, thereby realizing the adjustment of the output voltage. The output end of the frequency selection switch 714 is electrically connected to the input end of the electronic control unit 4 (ECU), and the output end of the electronic control unit 4 is connected to the speed control end of the engine 3, thereby controlling the frequency of the generator 5.

[0054] The integrated motor winding multi-position automatic conversion device 8 is installed (such as by riveting, screw connection, welding, bonding, etc.) in the junction box of the generator 5, and is used to switch the connection mode of the winding lead tap of the generator 5. The integrated motor winding multi-position automatic conversion device 8 can automatically arrange and combine the connection mode of the generator 5 winding to achieve Y-type series connection, delta-type series connection, delta-type parallel connection, and all parallel connection modes, thereby achieving multiple voltage outputs.

[0055] The output circuit breaker 9 is installed at the bottom of the switch cabinet of the generator 5. The output circuit breaker 9 is arranged on the output path of the generator 5 to switch the electric energy of the generator 5 on and off.

[0056] In a preferred embodiment of the present invention, Figure 2 As shown, the unit control panel 7 is inlaid with 5 sets of unit controllers dedicated to multi-voltage generators. The unit controller includes a display screen 711 (color 1024*600: RGB 7-inch LCD screen), an operation button 712 (4*4*0.8mm patch film touch switch), a voltage selection switch 713, a frequency selection switch 714, a terminal block 715 (Phoenix PCB terminal block MSTB 2.5 / 12-STF-5.08 1778085), a chip circuit board 716 (STMicroelectronics STM32F765), a cloud service module 717 (such as Huali Electromechanical V2E-4G, etc.), and a GPRS (General Packet The chip circuit board 716 is electrically connected to the display screen 711, the operation button 712, the voltage selection switch 713, the frequency selection switch 714, the terminal block 715, the cloud service module 717 (such as V2E-4G, etc.), and the GPRS (General Packet Radio Service).

[0057] The cloud service module 717 transmits data to the cloud server 720 via the GPRS antenna 718 and the GPS module 719, and the user operation terminal 721 can be connected to the cloud server 720. The unit controller dedicated to the 5 groups of multi-voltage generators integrates a four-position voltage selection switch 713 and a two-position frequency selection switch 714, and presets four voltages and two frequency protection parameters that can be set independently. When the selection switch is switched to a different position, the control screen automatically switches to the corresponding protection parameters. The unit controller also has a built-in cloud service module 717, which uploads data to the cloud server 720 via the GPRS antenna 718 and the GPS module 719 for the 721 user operation terminal 721 to view and operate.

[0058] The addition of cloud services can remotely monitor the unit's operating status, power generation, and fuel consumption, and can also remotely control and lock the unit. This function is very suitable for the rental industry.

[0059] The user operates the terminal 721 and can view the information data of the cloud service module 717 through the cloud server 720, which is convenient for remote viewing and operation. The unit control panel 7 has a built-in cloud service module 717, and the user or other authorized persons can remotely control and view the status of the generator set 5 and the location of the unit, which is particularly convenient for the rental industry of the generator set 5 with multiple voltage outputs.

[0060] Preferably, the unit control panel 7 is connected to the integrated motor winding multi-position automatic conversion device 8 through a control cable, and the voltage selection switch 713 of the unit controller switches the gear, issues instructions to control the operation of the electric motor of the integrated motor winding multi-position automatic conversion device 8, switches different winding tap connection structures, and realizes different voltage outputs. The specific method of controlling the operation of the electric motor can adopt the existing motor torque position encoding device method, which is a prior art and will not be elaborated here.

[0061] The integrated motor winding multi-position automatic conversion device 8 includes a DC motor as an actuator, and a voltage selection switch 713 switches different positions to provide control power. The built-in limit switch of the conversion device is used to realize electric switching to different positions. After the limit switch is actuated, the motor power supply is disconnected.

[0062] More preferably, the unit control panel 7 is connected to the electronic control unit 4 via a control cable, and the frequency selection switch 714 of the unit controller switches the gear, and issues a command to adjust the speed of the engine 3 via CAN communication to achieve 50 / 60HZ switching.

[0063] When the frequency selection switch 714 switches to different positions, different input point signals are given to the unit controller. The controller's "multiple sets of spare parameters" can be used to adjust the 50 / 60HZ parameters. After adjustment, the controller will send relevant CAN speed control instructions to the engine ECU according to the adjusted frequency data. The ECU receives the instructions to adjust the speed and adjust the frequency (based on the existing n=60f / p, where n is the speed, f is the frequency, and p is the number of pole pairs, and it is known that the motor is 4-pole, that is, 1500 rpm corresponds to 50HZ, and 1800 rpm corresponds to 60HZ).

[0064] The unit control panel 7 is provided with a voltage conversion switch and a frequency conversion switch, which can control the integrated motor winding multi-position automatic conversion device 8 to switch different winding tap connection methods to achieve different voltage outputs, control the electronic control unit 4 (ECU) to adjust the speed to achieve 50 / 60HZ frequency switching, and feed back to the unit control panel 7 position to match multiple sets of independently configurable generator 5 and engine 3 parameter protection at the corresponding positions.

[0065] The unit controller embedded in the unit control panel 7 has a voltage selection switch 713 and a frequency selection switch 714. After selection, the integrated motor winding multi-position automatic conversion device 8 equipped with an electric motor can be driven by one key to switch the winding lead-out tap of the generator 5. The integrated motor winding multi-position automatic conversion device 8 replaces the traditional motor terminal board and is placed in the transfer box above the motor winding, does not occupy the external space of the motor, saves space, and does not need to be manually disassembled and adjusted, saving a lot of manpower, material resources and energy.

[0066] In a preferred embodiment of the present invention, Figure 3 As shown, the integrated motor winding multi-position automatic conversion device 8 includes a first actuator 81, a second actuator 82, a first terminal 83, a second terminal 84, an output terminal 85 and a conversion static contact 86.

[0067] The actuator includes a moving contact 820, a push rod 821, a nut 822, a limit module 823, a screw rod 824, a reduction gear set 825, a micro DC motor 826 and a control terminal 827. The moving contact 820 is connected to the push rod 821, the push rod 821 is connected to the nut 822, the nut 822 is connected to the limit module 823 and is screwed onto the screw rod 824, the screw rod 824 is connected to the reduction gear set 825, the reduction gear set 825 is connected to the micro DC motor 826, and the micro DC motor 826 is connected to the control terminal 827.

[0068] When the control terminal 827 receives the external control power, the micro DC motor 826 is activated to drive the reduction gear set 825. After the reduction, the torque increases, driving the screw 824 to rotate, thereby driving the nut 822, the screw 824, and the moving contact 820 to move horizontally. After the moving contact 820 is activated, the contact position of the static contact 86 is switched. When the nut 822 moves to a certain position, it touches the limit module 823 and stops. The limit module 823 is set to three positions, corresponding to the I position, 0 position, and II position of the static contact 86. The first terminal 83 is connected to the T2 / T3, T6 / T7, T10 / T11 of the motor stator winding lead wire; the second terminal 84 is connected to the T4, T8, and T12 of the motor stator winding lead wire; the output terminal 85 is connected to the T1, T5, T9, and N of the motor stator winding lead wire; the positions of T1, T5, T9, and N are fixed.

[0069] In a preferred embodiment of the present invention, Figure 4As shown, when the first actuator 81 is in position 0 and the second actuator 82 is in position II, the voltage conversion switch is at -60°, T2 is electrically connected to T3, T6 is electrically connected to T7, T10 is electrically connected to T11, T4 is electrically connected to T8 and T12 and is led to the device output terminal N, and is respectively led out from T1, T5, T9, and N (N is connected to T4 / T8 / T12 in this connection structure) as U, V, W, and N (U, V, and W represent three phase lines, L represents the live line, and N represents the neutral line), forming a three-phase four-wire series Y-type connection structure.

[0070] If the single winding is 220V, the output voltage = √3*2*220V, which is calculated to be about 760V. After the AVR adjusts the voltage in a small range, it can also be used as AC690V three-phase four-wire power generation output.

[0071] In a preferred embodiment of the present invention, Figure 5 As shown, when the first actuator 81 is in position 0 and the second actuator 82 is in position I, the voltage conversion switch is at -30°, T2 is electrically connected to T3, T6 is electrically connected to T7, T10 is electrically connected to T11, T1 is electrically connected to T12, T4 is electrically connected to T5, and T8 is electrically connected to T9, and U, V, and W are respectively drawn from T1, T5, and T9 to form a three-phase series △-type connection structure.

[0072] If the single winding is 220V, the output voltage = 2*220V, which is calculated to be 440V. After the AVR adjusts the voltage in a small range, it can also be used as AC400V three-phase power generation output.

[0073] In a preferred embodiment of the present invention, Figure 6 As shown, when the first actuator 811 is in position I and the second actuator 82 is in position 0, the voltage conversion switch is at 30°, T1 is electrically connected to T4, T10, and T11, T2 is electrically connected to T3, T5, and T8, and T6 is electrically connected to T7, T9, and T12, and U, V, and W are respectively drawn from T1, T5, and T9 to form a three-phase parallel △-type connection structure.

[0074] If the single winding is 220V, the output voltage = 220V, which can be used as AC220V three-phase power generation output.

[0075] In a preferred embodiment of the present invention, Figure 7As shown, when the first actuator 81 is in position II and the second actuator 82 is in position I (there are four connection modes between the voltage switching switch: 02 01 10 21), the voltage conversion switch is at 60°, T1 is electrically connected to T4, T5, T8, T9, and T12, T2 is electrically connected to T3, T6, T7, T10, and T11 and leads to the output terminal N of the device, and T1 and N are led out as U (L) and neutral line, which can form a full parallel connection structure. When the actuators are in different positions, N has been connected accordingly. For example, when the first actuator is in position II and the second actuator is in position I, N has been connected to T2 / T3 / T6 / T7 / T10 / T11 and led out as the neutral point (neutral line).

[0076] If the single winding is 220V, the output voltage = 220V, which can be used as AC220V single-phase power generation output.

[0077] Because the motor windings are fully utilized, the above connection methods are all full power output without power loss. That is, the motor can output three-phase four-wire AC760V 50 / 60HZ, three-phase four-wire AC690V50 / 60HZ, three-phase AC440V50 / 60HZ, three-phase AC400V 50 / 60HZ, three-phase AC220V 50 / 60HZ, and single-phase AC220V 50 / 60HZ power without changing the power.

[0078] The integrated motor winding multi-position automatic switching device 8 uses the dynamic and static contacts of the mechanical interlocking structure to switch, avoiding the switching failure caused by erroneous operation or partial operation during the switching. And the preset built-in cables are used to connect the static contacts to avoid wiring errors caused by cumbersome and complicated taps during manual adjustment. The unit control panel 7 presets multiple protection parameters that can be edited independently. Switching the connection mode switches the corresponding protection parameters at the same time, so that it is more matched with the protection parameters of the engine 3 and the generator 5, avoiding the alarm erroneous operation or non-operation caused by inappropriate protection parameters.

[0079] When converting to different voltages, the fixed-position T1, T5, T9, and N terminals are used as U, V, W, and N to lead out to external equipment for use in the motor, avoiding the need to disassemble and adjust the wiring position of the motor output terminal 85 due to switching.

[0080] In a preferred embodiment of the present invention, a storage battery is further included, and the storage battery is electrically connected to the unit control panel 7 and the integrated motor winding multi-position automatic conversion device 8. The storage battery is used for starting the unit and for conversion by the integrated motor winding multi-position automatic conversion device 8.

[0081] The integrated motor winding multi-position automatic conversion device 8 has a built-in micro DC motor 826, which can be converted using the battery of the generator 5, without the need for an external power supply. The device is equipped with a reduction gear set 825, which can use the micro motor to generate a large torque to complete the switching. It also has a built-in three-position limit module 823 to avoid poor contact or inability to disengage due to inadequate contact action.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0083] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate 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 claims and their equivalents.

Claims

1. An intelligent generator set that automatically adjusts to multiple voltage outputs, characterized in that: It includes the engine, generator, voltage regulator, unit control panel, electronic control unit, integrated motor winding multi-position automatic switching device and output circuit breaker; The engine is used to drive the generator to generate electricity; The voltage regulator is connected to the generator excitation current control terminal, and the generator output voltage is regulated by controlling the generator excitation current; The unit control panel is provided with a voltage selection switch and a frequency selection switch. The output end of the voltage selection switch is connected to the control end of the electric motor of the integrated motor winding multi-position automatic conversion device, and the electric motor is used to switch the connection mode of the generator winding lead tap, thereby realizing the adjustment of the output voltage; the output end of the frequency selection switch is connected to the input end of the electronic control unit, and the output end of the electronic control unit is connected to the engine speed control end, thereby controlling the generator frequency; The integrated motor winding multi-position automatic switching device is installed in the generator junction box and is used to switch the connection mode of the generator winding lead tap; The output circuit breaker is set on the output circuit of the generator to switch the electrical energy of the generator on and off.

2. The intelligent generator set capable of automatically adjusting to multiple voltage outputs as claimed in claim 1, characterized in that: The unit control panel is also provided with a cloud service module, a GPRS antenna and a GPS module; The cloud service module transmits data to the cloud server via the GPRS antenna and GPS module, and the user operation terminal can be connected to the cloud server.

3. The intelligent generator set capable of automatically adjusting to multiple voltage outputs as claimed in claim 2, characterized in that: The unit control panel is connected to the integrated motor winding multi-position automatic conversion device through a control cable, the voltage selection switch switches the gear, issues instructions to control the operation of the electric motor of the integrated motor winding multi-position automatic conversion device, switches different winding tap connection structures, and realizes different voltage outputs.

4. The intelligent generator set capable of automatically adjusting to multiple voltage outputs as claimed in claim 2, characterized in that: The control panel of the unit is connected to the electronic control unit through a control cable, the frequency selection switch switches the gear, and sends out instructions to adjust the engine speed through CAN communication to achieve 50 / 60HZ switching.

5. The intelligent generator set capable of automatically adjusting to multiple voltage outputs as claimed in claim 1, characterized in that: The integrated motor winding multi-position automatic conversion device comprises a first actuator, a second actuator, a first wiring terminal, a second wiring terminal, an output terminal and a conversion static contact; The actuator includes a moving contact, a push rod, a nut, a limit module, a screw, a reduction gear set, a micro DC motor and a control terminal; The moving contact is connected to the push rod, the push rod is connected to the nut, the nut is connected to the limit module and is sleeved on the screw rod through a screw, the screw rod is connected to the reduction gear set, the reduction gear set is connected to the micro DC motor, and the micro DC motor is connected to the control terminal; The limit module is set with three positions, corresponding to the I position, 0 position and II position of the conversion static contact respectively. The first terminal is connected to T2 / T3, T6 / T7, T10 / T11 of the motor stator winding lead wire; the second terminal is connected to T4, T8, T12 of the motor stator winding lead wire; the output terminal is connected to T1, T5, T9, N of the motor stator winding lead wire; the positions of T1, T5, T9 and N are fixed.

6. The intelligent generator set capable of automatically adjusting to multiple voltage outputs as claimed in claim 5, characterized in that: When the first actuator is in position 0 and the second actuator is in position II, the voltage conversion switch is at -60°, T2 is connected to T3, T6 is connected to T7, T10 is connected to T11, T4 is connected to T8 and T12 and led to the output terminal N of the device, and are respectively led out from T1, T5, T9 and N as U, V, W and N, forming a three-phase four-wire series Y-type connection structure.

7. The intelligent generator set capable of automatically adjusting to multiple voltage outputs as claimed in claim 5, characterized in that: When the first actuator is in position 0 and the second actuator is in position I, the voltage conversion switch is at -30°, T2 is connected to T3, T6 is connected to T7, T10 is connected to T11, T1 is connected to T12, T4 is connected to T5, T8 is connected to T9, and U, V, and W are respectively drawn from T1, T5, and T9 to form a three-phase series △ connection structure.

8. The intelligent generator set capable of automatically adjusting to multiple voltage outputs as claimed in claim 5, characterized in that: When the first actuator is in position I and the second actuator is in position 0, the voltage conversion switch is at 30°, T1 is connected to T4, T10, and T11, T2 is connected to T3, T5, and T8, and T6 is connected to T7, T9, and T12. U, V, and W are respectively drawn from T1, T5, and T9 to form a three-phase parallel △-type connection structure.

9. The intelligent generator set capable of automatically adjusting to multiple voltage outputs as claimed in claim 5, characterized in that: When the first actuator is in position II and the second actuator is in position I, the voltage conversion switch is at 60°, T1 is connected to T4, T5, T8, T9, and T12, T2 is connected to T3, T6, T7, T10, and T11 and is led to the output terminal N of the device, and T1 and N are led out as U and neutral lines to form a full parallel connection structure.

10. The intelligent generator set capable of automatically adjusting to multiple voltage outputs as claimed in claim 1, characterized in that: It also includes a storage battery, which is respectively connected to the unit control panel and the integrated motor winding multi-position automatic conversion device.

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