Movable intelligent frequency conversion control equipment

Abstract

The invention discloses movable intelligent frequency conversion control equipment, belongs to the technical field of power electronic equipment, and aims to solve the problems that a traditional frequency converter is difficult to move in temporary scenes such as outdoor first-aid repair, mobile operation and emergency rescue, cannot quickly adapt to an unstable power supply, and is low in field deployment efficiency and poor in environmental adaptability. The equipment comprises a modular mobile carrier, a multi-source power supply adaptive system, a quick connection and protection unit and a lightweight heat dissipation structure. The modularized mobile carrier adopts a light alloy frame with universal wheels and a foldable handrail, so that the modularized mobile carrier can be conveniently moved by a single person; the multi-source power supply adaptive system supports three modes of a power grid, a generator and a built-in energy storage power supply, and can realize seamless automatic switching less than or equal to 0.5 second; the output end is provided with a waterproof quick-plug connector and multiple electrical protection modules, so that quick connection and safety protection can be realized; the overall weight is less than or equal to 30 kg, and efficient heat dissipation is achieved through the hollowed-out shell and the temperature control fan.

Description

Technical Field

[0001] This invention relates to the field of power electronic equipment technology, specifically a portable frequency converter with flexible mobility and suitable for temporary power supply scenarios. Background Technology

[0002] As an important motor drive and control device, frequency converters are widely used in various fields of industrial production. Their main function is to achieve smooth speed regulation and energy-saving operation of AC motors by changing the power supply frequency. Traditional industrial frequency converters are usually designed for cabinet or wall-mounted installation, intended for long-term operation in fixed factory buildings with stable power supply and controllable environment. The compact structure of these frequency converters serves electrical performance rather than mobility. They often use metal sheet metal casings and have densely packed internal components, resulting in a large overall size and an astonishing weight, generally exceeding 50 kilograms, and even several hundred kilograms. Their installation relies on DIN rails or bolt fixation, and the input and output use standard bolt terminals, making the wiring process cumbersome and requiring professional electricians.

[0003] However, with the diversification of modern production and lifestyles, the demand for frequency conversion control of motors is becoming increasingly prominent in many non-fixed, temporary, and even harsh outdoor scenarios. These scenarios mainly include:

[0004] 1. Outdoor Emergency Repair and Maintenance: In industries such as power, petroleum, telecommunications, and water utilities, when critical facilities such as pipelines, base stations, and pumping stations in the field experience sudden failures, it is necessary to quickly activate backup motors or temporary drive equipment to restore operation. On-site locations often lack fixed power supplies and lifting equipment, making the transport of traditional frequency converters extremely difficult. Furthermore, their standard wiring methods are time-consuming and labor-intensive in the field, severely impacting repair efficiency. In addition, the repair site may only be able to provide a small generator as a power source, whose output voltage and frequency fluctuate significantly. Traditional frequency converters are poorly adapted to this, easily leading to protective shutdowns or damage due to power quality issues.

[0005] 2. Mobile Operations and Temporary Construction: For example, in agricultural water-saving irrigation, water pumps need to move with the irrigation area; in temporary construction sites such as building construction, road maintenance, and stadium construction, various fans, water pumps, and mixing equipment need to frequently change positions; in film and television shooting, outdoor performances, and other activities, special equipment also requires temporary power supply and speed regulation. In these scenarios, the motor equipment itself is mobile, while the fixed-installation frequency converter cannot follow. If the method of frequently disassembling and assembling the fixed frequency converter is adopted, it will not only significantly increase the labor and time costs, but repeated wiring will also easily lead to loose terminals, cable wear, and bring safety hazards and equipment damage.

[0006] 3. Emergency Rescue and Field Operations: In rescue sites following disasters such as earthquakes and floods, or in field operations such as geological exploration and scientific research, it is often necessary to quickly establish temporary power systems to drive water pumps, lighting, communication, or medical equipment in environments completely without a public power grid. Currently, the common practice is to use generators to directly drive motors, but this lacks speed regulation and soft-start capabilities, resulting in significant equipment stress and high energy consumption. Introducing variable frequency control presents a series of challenges, including difficulties in equipment transport, poor compatibility with generators, and complex on-site deployment.

[0007] Currently, there are significant shortcomings in the market and technology to address the aforementioned mobility and temporary needs:

[0008] Firstly, regarding portability, although some manufacturers have attempted to launch so-called "lightweight" inverters, most of them are merely smaller versions of traditional models, still quite heavy (usually over 20kg), and have not fundamentally designed a carrier structure that facilitates manual movement. Simple handle designs are still very difficult to carry over long distances on uneven surfaces, failing to achieve true "mobility."

[0009] Secondly, regarding power supply adaptability, the power input range of most general-purpose frequency converters is designed based on a stable power grid, with limited tolerance for voltage fluctuations, frequency deviations, and waveform distortion. When connected to power sources with poor output characteristics, such as diesel generators or gasoline generators, frequent alarms, unstable operation, and even damage to internal components are highly likely to occur. Although some high-end models support wide voltage input, they are expensive and usually lack the ability to quickly, seamlessly, and automatically switch between various power sources with vastly different characteristics (such as the power grid, generators, and batteries).

[0010] Secondly, regarding on-site deployment efficiency, the installation and wiring of traditional frequency converters is a specialized and time-consuming process. In temporary scenarios, the lack of specialized tools and an ideal working environment makes it difficult to guarantee connection reliability, and exposed wiring terminals pose risks of electric shock and short circuits. A fast, reliable, and safe electrical connection interface is a key bottleneck in temporary applications.

[0011] Finally, regarding environmental adaptability, temporary application scenarios are complex and may face challenges such as rain, dust, high or low temperatures. Traditional frequency converters are mainly designed for indoor cabinet environments, and are prone to overheating and protection failure due to insufficient heat dissipation under outdoor high temperatures; their protection level is usually low and cannot cope with rain and dust.

[0012] In summary, existing frequency converter products fail to fully consider portability, multi-source power supply compatibility, rapid deployment capabilities, and robustness in complex environments, creating a significant technological gap. Therefore, developing a portable frequency converter that integrates a mobile platform, intelligent power management, fast interfaces, and enhanced heat dissipation protection is of significant practical value and real-world importance in meeting the growing demand for temporary frequency conversion control in outdoor repairs, mobile operations, and emergency rescue. Summary of the Invention

[0013] To address the problems of traditional frequency converters being difficult to move in temporary scenarios such as outdoor repairs, mobile operations, and emergency rescues, being unable to quickly adapt to unstable power supplies, having low on-site deployment efficiency, and having poor environmental adaptability, this invention provides a mobile intelligent frequency converter control device.

[0014] The portable intelligent frequency converter control device of the present invention includes:

[0015] The modular mobile carrier includes a high-strength lightweight alloy frame, braked omnidirectional silent wheels installed at the bottom of the frame, and a foldable and retractable handrail integrated at the top of the frame; the frame has a layered structure, from top to bottom including an upper layer with an operation panel and status display screen, a middle layer with a frequency conversion control core module, and a lower layer with a power supply interface and energy storage unit mounting position, and the layers are connected by quick snap-fit.

[0016] The multi-source power supply adaptive system is configured to support three modes: grid power supply, generator power supply and built-in energy storage power supply. It also includes an intelligent detection module for automatically controlling the switching between the three power supply modes with a switching time of no more than 0.5 seconds.

[0017] The quick connection and protection unit includes a waterproof quick-connect connector at the output end and a built-in overcurrent, overvoltage, overload and leakage protection module. The protection module is configured to cut off the output and trigger an audible and visual alarm within 0.1 seconds when an abnormality is detected, and simultaneously display the fault code on the status display screen.

[0018] The inverter features a lightweight heat dissipation structure, with an overall weight not exceeding 30kg. The casing adopts a hollow heat dissipation structure and is equipped with a temperature-controlled fan. The temperature-controlled fan is configured to automatically start when the internal temperature reaches or exceeds 40℃.

[0019] Preferably, the high-strength lightweight alloy frame is a 6061 aluminum alloy welded frame with anti-corrosion treatment on the surface; the omnidirectional silent wheels are made of polyurethane with built-in bearings on the wheel axles; the foldable telescopic handrail is folded by spring buckles and has at least three lockable height positions when unfolded.

[0020] Preferably, the multi-source power supply adaptive system further includes:

[0021] A wide-range rectifier circuit connected to the power grid interface;

[0022] A voltage compensation module connected to the generator input terminal;

[0023] A DC / AC inverter connected to the energy storage unit mounting location;

[0024] And a relay switching circuit controlled by a microcontroller, used to execute the switching logic of the three power supply modes.

[0025] Preferably, the waterproof quick-connector has a bayonet structure, and the waterproof quick-connector is provided with a sealing ring and a contact protection cover inside. The waterproof quick-connector is configured to automatically complete mechanical locking and electrical connection when inserted into the generator line.

[0026] Preferably, the hollow heat dissipation structure of the outer shell is an inclined louvered vent, and the number of temperature-controlled fans is at least two, with their start and stop controlled by a temperature sensor.

[0027] Preferably, the system also includes a power supply switching control program that is communicatively connected to the intelligent detection module. The program is configured to monitor the voltage signals of each power supply terminal in real time, and immediately trigger a switch to the backup power supply when the main power supply is interrupted. During the switching process, the energy storage capacitor is used to maintain continuous power supply to the motor.

[0028] Preferably, it also includes a protection control program configured to collect output current, voltage and temperature data in real time. When any data exceeds a preset threshold, the program controls the protection module to disconnect the output and drives the audible and visual alarm and displays the corresponding fault code on the status display screen.

[0029] Preferably, it also includes a human-machine interaction program that runs on a touch screen integrated on the operation panel, used to display frequency, voltage, and current operating parameters, and to receive user input to manually switch power supply modes or set motor operating parameters.

[0030] The beneficial effects of this invention are:

[0031] 1. Ease of movement: It can be pushed by a single person and is suitable for unpaved roads such as mud and gravel. Compared with traditional frequency converters, the handling efficiency is improved by more than 60%.

[0032] 2. Strong scenario adaptability: Three power supply modes cover most temporary scenarios, especially suitable for emergency operations in areas without power grid.

[0033] 3. Highly efficient deployment: quick-connect connection + automatic power supply switching, preparation time from arrival at the site to normal operation is ≤5 minutes.

[0034] 4. Safe and reliable: Multiple protection mechanisms and wide temperature operation capability reduce the failure rate by 40% in complex environments. Attached Figure Description

[0035] Figure 1 This is a structural schematic diagram of the portable intelligent frequency conversion control device described in this invention;

[0036] Figure 2 This is a schematic diagram of the multi-source power supply adaptive system of the present invention;

[0037] Figure 3 This is a flowchart of the portable frequency converter of the present invention. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0041] Specific Implementation Method 1: The following is combined with... Figures 1 to 3 This embodiment describes a portable intelligent frequency converter control device, which includes:

[0042] The modular mobile carrier includes a high-strength lightweight alloy frame, braked omnidirectional silent wheels installed at the bottom of the frame, and a foldable and retractable handrail integrated at the top of the frame; the frame has a layered structure, from top to bottom including an upper layer with an operation panel and status display screen, a middle layer with a frequency conversion control core module, and a lower layer with a power supply interface and energy storage unit mounting position, and the layers are connected by quick snap-fit.

[0043] The multi-source power supply adaptive system is configured to support three modes: grid power supply, generator power supply and built-in energy storage power supply. It also includes an intelligent detection module for automatically controlling the switching between the three power supply modes with a switching time of no more than 0.5 seconds.

[0044] The quick connection and protection unit includes a waterproof quick-connect connector at the output end and a built-in overcurrent, overvoltage, overload and leakage protection module. The protection module is configured to cut off the output and trigger an audible and visual alarm within 0.1 seconds when an abnormality is detected, and simultaneously display the fault code on the status display screen.

[0045] The inverter features a lightweight heat dissipation structure, with an overall weight not exceeding 30kg. The casing adopts a hollow heat dissipation structure and is equipped with a temperature-controlled fan. The temperature-controlled fan is configured to automatically start when the internal temperature reaches or exceeds 40℃.

[0046] The high-strength lightweight alloy frame is a 6061 aluminum alloy welded frame with anti-corrosion treatment on the surface; the omnidirectional silent wheels are made of polyurethane with built-in bearings on the wheel axles; the foldable telescopic handrail is folded by spring buckles and has at least three lockable height positions when unfolded.

[0047] The multi-source power supply adaptive system also includes:

[0048] A wide-range rectifier circuit connected to the power grid interface;

[0049] A voltage compensation module connected to the generator input terminal;

[0050] A DC / AC inverter connected to the energy storage unit mounting location;

[0051] And a relay switching circuit controlled by a microcontroller, used to execute the switching logic of the three power supply modes.

[0052] The waterproof quick-connector has a bayonet structure and is equipped with a sealing ring and contact protection cover inside. The waterproof quick-connector is configured to automatically complete mechanical locking and electrical connection when inserted into the generator line.

[0053] The hollow heat dissipation structure of the outer shell is a louvered ventilation opening with an angled arrangement. The number of temperature-controlled fans is at least two, and their start and stop are controlled by a temperature sensor.

[0054] It also includes a power supply switching control program that is communicatively connected to the intelligent detection module. The program is configured to monitor the voltage signal of each power supply terminal in real time, and immediately trigger the switching to the backup power supply when the main power supply is interrupted. During the switching process, the energy storage capacitor is used to maintain continuous power supply to the motor.

[0055] It also includes a protection control program, which is configured to collect output current, voltage and temperature data in real time. When any data exceeds a preset threshold, the protection module is controlled to disconnect the output, and the audible and visual alarm is activated and the corresponding fault code is displayed on the status display screen.

[0056] It also includes a human-machine interface program that runs on a touchscreen integrated on the control panel. This program displays operating parameters such as frequency, voltage, and current, and receives user input to manually switch power supply modes or set motor operating parameters.

[0057] Example:

[0058] like Figure 1 As shown, the portable inverter in this embodiment uses a robust frame welded from 6061 aluminum alloy profiles, with an anodized surface for corrosion protection. Four 18cm diameter polyurethane universal silent wheels with independent foot brakes are installed at the bottom corners of the frame. A foldable handle secured by spring clips is located at the top, allowing it to be locked at three heights: 85cm, 100cm, and 115cm. The interior of the frame is clearly divided into three layers: the upper panel integrates a 4.3-inch touchscreen and buttons; the middle layer is a closed metal shell housing the inverter control mainboard; and the lower layer is an open area with a power input socket, a dedicated generator input port, and a sliding rail for mounting an optional lithium battery pack.

[0059] like Figure 2 As shown, the power supply system is one of the core components. The mains input is processed by a wide-range rectifier circuit; the generator input first passes through an active voltage compensation module to stabilize the fluctuating voltage (150-450V) to a usable range; the built-in 24V / 50Ah lithium battery pack outputs AC power at the industrial frequency through a 3kW DC / AC inverter. A smart detection board based on an STM32F103 continuously monitors the voltage status of these three inputs. When the primary power source (such as the mains) fails, the controller drives a relay to switch to a backup power source (such as a generator or battery) within 0.3 seconds. At the moment of switching, a large-capacity capacitor bank connected in parallel to the DC bus briefly discharges to maintain the energy of the inverter control circuit and the motor magnetic field, achieving truly "seamless" switching and avoiding motor speed fluctuations or shutdowns.

[0060] The output end uses an industrial-grade bayonet quick-connect connector. The connector housing meets IP65 protection standards and has an internal silicone sealing ring. When not connected, a spring-driven protective cover protects the copper contacts. To connect, align the motor lead plug, insert it, and rotate it approximately 60 degrees to complete the mechanical locking and electrical connection; the entire process is quick and reliable.

[0061] To control weight and ensure heat dissipation, the main unit casing is made of 1.2mm thick stamped aluminum alloy sheet, with 30° angled louvers on the sides and rear. Internally, two 12V DC fans (8025 specification) are mounted above the heatsink. A DS18B20 temperature sensor is installed near the main power components. When the detected temperature exceeds a 40°C threshold, the fans automatically start to expel hot air. Actual measurements show that the heat dissipation efficiency is over 20% higher than a closed casing of the same volume.

[0062] In terms of software, the device runs three main programs, and its control logic is as follows: Figure 3 As shown:

[0063] 1. Power Supply Switching Control Program: Real-time monitoring of voltage signals from the power grid, generator, and built-in energy storage. When the primary power supply (such as the power grid) voltage is abnormal or interrupted, the program immediately triggers a control signal to drive the relay to switch to backup generator or battery power. At the moment of switching, the program, in conjunction with the energy storage capacitor in the hardware, maintains the DC bus voltage stability, ensuring continuous power supply to the motor and achieving a seamless switching process.

[0064] 2. Protection and Control Program: Continuously collects current, voltage, and temperature data of key components from the inverter output. When any parameter exceeds a preset safety threshold, the program quickly issues a command to control the relay in the protection module to cut off the output. Simultaneously, it drives the buzzer and LED alarm lights to provide audible and visual alarms and displays the corresponding fault code on the touchscreen, such as... Figure 3 As shown.

[0065] 3. Human-Machine Interface Program: Running on a 4.3-inch touchscreen, providing a user-friendly interface. This program displays real-time parameters such as motor operating frequency, voltage, and current, and allows users to manually switch power supply modes, set target motor frequency, acceleration / deceleration times, and overload protection values. Some settings and status feedback processes are also integrated within the program. Figure 3 This is reflected in the text.

[0066] Through the above-mentioned collaborative design of hardware and software, especially Figure 3 The intelligent control process shown in this embodiment demonstrates that the mobile frequency converter exhibits excellent mobility, rapid deployment capability, stable multi-source power supply adaptability, and high reliability in multiple simulated outdoor emergency drills.

[0067] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A portable intelligent frequency converter control device, characterized in that, include: The modular mobile carrier includes a high-strength lightweight alloy frame, braked omnidirectional silent wheels installed at the bottom of the frame, and a foldable and retractable handrail integrated at the top of the frame; the frame has a layered structure, from top to bottom including an upper layer with an operation panel and status display screen, a middle layer with a frequency conversion control core module, and a lower layer with a power supply interface and energy storage unit mounting position, and the layers are connected by quick snap-fit. The multi-source power supply adaptive system is configured to support three modes: grid power supply, generator power supply and built-in energy storage power supply. It also includes an intelligent detection module for automatically controlling the switching between the three power supply modes with a switching time of no more than 0.5 seconds. The quick connection and protection unit includes a waterproof quick-connect connector at the output end and a built-in overcurrent, overvoltage, overload and leakage protection module. The protection module is configured to cut off the output and trigger an audible and visual alarm within 0.1 seconds when an abnormality is detected, and simultaneously display the fault code on the status display screen. The inverter features a lightweight heat dissipation structure, with an overall weight not exceeding 30kg. The casing adopts a hollow heat dissipation structure and is equipped with a temperature-controlled fan. The temperature-controlled fan is configured to automatically start when the internal temperature reaches or exceeds 40℃.

2. The portable intelligent frequency conversion control device according to claim 1, characterized in that, The high-strength lightweight alloy frame is a 6061 aluminum alloy welded frame with anti-corrosion treatment on the surface; the omnidirectional silent wheels are made of polyurethane with built-in bearings on the wheel axles; the foldable telescopic handrail is folded by spring buckles and has at least three lockable height positions when unfolded.

3. The portable intelligent frequency conversion control device according to claim 1, characterized in that, The multi-source power supply adaptive system also includes: A wide-range rectifier circuit connected to the power grid interface; A voltage compensation module connected to the generator input terminal; A DC / AC inverter connected to the energy storage unit mounting location; And a relay switching circuit controlled by a microcontroller, used to execute the switching logic of the three power supply modes.

4. The portable intelligent frequency conversion control device according to claim 1, characterized in that, The waterproof quick-connector has a bayonet structure and is equipped with a sealing ring and contact protection cover inside. The waterproof quick-connector is configured to automatically complete mechanical locking and electrical connection when inserted into the generator line.

5. The portable intelligent frequency conversion control device according to claim 1, characterized in that, The hollow heat dissipation structure of the outer shell is a louvered ventilation opening with an angled arrangement. The number of temperature-controlled fans is at least two, and their start and stop are controlled by a temperature sensor.

6. The portable intelligent frequency conversion control device according to claim 1, characterized in that, It also includes a power supply switching control program that is communicatively connected to the intelligent detection module. The program is configured to monitor the voltage signal of each power supply terminal in real time, and immediately trigger the switching to the backup power supply when the main power supply is interrupted. During the switching process, the energy storage capacitor is used to maintain continuous power supply to the motor.

7. The portable intelligent frequency conversion control device according to claim 1, characterized in that, It also includes a protection control program, which is configured to collect output current, voltage and temperature data in real time. When any data exceeds a preset threshold, the protection module is controlled to disconnect the output, and the audible and visual alarm is activated and the corresponding fault code is displayed on the status display screen.

8. The portable intelligent frequency conversion control device according to claim 1, characterized in that, It also includes a human-machine interface program that runs on a touchscreen integrated on the control panel. This program displays operating parameters such as frequency, voltage, and current, and receives user input to manually switch power supply modes or set motor operating parameters.

Images