Power generation device, control system and method for aerial work platform

Abstract

The invention provides a power generation device for an aerial work platform and a control system and method.The power generation device comprises an engine, a power generator, an automatic tensioning wheel and a belt, the power generator is fixed to the aerial work platform through a power generator mounting support, and the automatic tensioning wheel is fixed to the power generator through an automatic tensioning wheel mounting support; the belt is connected between an engine belt pulley of the engine and a generator belt pulley of the generator, and the tensioning degree of the belt is adjusted through the automatic tensioning wheel; the power generation device further comprises a rectifier bridge, an inverter and a transformation filter which are electrically connected with the power generator, the rectifier bridge is used for rectifying alternating current output by the power generator into direct current and transmitting the direct current to the inverter, and the inverter is used for inverting the direct current into the alternating current. And the transformation filter is used for carrying out transformation, filtering, frequency modulation and voltage regulation on the alternating current to form stable voltage and frequency output.

Description

Technical Field

[0001] The present application relates to the technical field of aerial work equipment, and in particular to a power generation device, a control system and a method for an aerial work platform. Background Art

[0002] As a high-altitude work platform, mobile lifting work platforms have been widely used in places such as construction. However, since the electricity coverage of construction sites is usually insufficient, users face difficulties in using electricity when working at high altitudes, which seriously affects work efficiency. As users' requirements for the convenience of electricity use continue to increase, the demand for mobile lifting work platform vehicle-mounted generators has become increasingly prominent.

[0003] At present, most mobile lifting work platform onboard generators are hydraulic generators, which have the advantages of small size, high power-to-weight ratio, and low noise. However, the hydraulic generator system has low transmission efficiency, slow response, unstable speed, and high temperature of hydraulic oil easily affects the stability of the generator voltage and power output. Summary of the invention

[0004] In order to solve the technical problems existing in the prior art, the first aspect of the present application provides a power generation device for an aerial work platform, including an engine, a generator, an automatic tensioner and a belt, wherein the generator is fixed to the aerial work platform through a generator mounting bracket, the automatic tensioner is fixed to the generator through an automatic tensioner mounting bracket, the belt is connected between the engine pulley of the engine and the generator pulley of the generator, and the tension is adjusted by the automatic tensioner; the power generation device also includes a rectifier bridge, an inverter and a transformer filter electrically connected to the generator, the rectifier bridge is used to rectify the alternating current output by the generator into direct current and transmit it to the inverter, the inverter is used to invert direct current into alternating current, and the transformer filter is used to transform, filter, frequency and voltage modulate the alternating current into a stable voltage and frequency output.

[0005] Furthermore, the power generation device also includes a power distribution socket, and the power distribution socket is electrically connected to the transformer filter.

[0006] Furthermore, the generator is a permanent magnet synchronous generator.

[0007] Furthermore, the belt is a poly-V belt.

[0008] A second aspect of the present application provides a power generation control system, including a power generation device for an aerial work platform as described above, and an input module, including a platform generator button switch, for receiving power generation control instructions; a control module, including a platform I / O board and a turntable controller, the platform I / O board is used to process the input signal of the platform generator button switch and transmit it to the turntable controller via CAN communication; after receiving the start-stop signal, the turntable controller adjusts the engine speed to the target speed, and outputs the generator control signal to the output module; the output module includes a generator start-stop control socket, which is used to cut off or restore the control circuit of the generator.

[0009] The third aspect of the present application provides a power generation control method applied to the above-mentioned power generation control system, including the following steps: obtaining the power generation control instruction of the platform generator button switch; the platform I / O board receives and processes the power generation control instruction, and then transmits it to the turntable controller through CAN communication; after the turntable controller receives the start signal, it adjusts the engine speed to the target speed; the turntable controller outputs the generator control signal to control the start of the generator; the engine drives the generator to rotate and generate electricity through belt drive; the rectifier bridge rectifies the AC power output by the generator into DC power, the inverter inverts the DC power into AC power, and the transformer filter transforms, filters, modulates the frequency and voltage of the AC power to form a stable voltage and frequency output.

[0010] Furthermore, the power generation control method also includes the step of: after the turntable controller receives the start signal, the turntable controller controls each actuator of the aerial work platform to enter a locked state, thereby achieving interlocking of the generator and the entire vehicle.

[0011] A fourth aspect of the present application provides an aerial work platform, comprising the above-mentioned power generation control system.

[0012] Compared with the prior art, the beneficial effects of this application are: 1. The power generation device for aerial work platforms provided in this application connects the engine and the generator through a belt drive, uses the crankshaft rotation of the engine to drive the generator to generate electricity, and rectifies, inverts, and modulates the frequency and voltage of the alternating current through a rectifier bridge, an inverter, and a transformer filter, and finally outputs a stable voltage and frequency. The device directly drives the generator through a belt, which not only achieves efficient transmission, but also avoids the generation of heat loss. At the same time, the combined action of the rectifier bridge, inverter, and transformer filter keeps the output voltage and frequency stable at all times, and even if the engine speed fluctuates, it will not affect the stable output of electricity. In addition, the device also uses a permanent magnet synchronous generator, which not only improves the energy conversion efficiency, but also achieves a smaller volume, so that it can easily adapt to the space layout requirements of a full range of vehicle models.

[0013] 2. The power generation control system provided in this application realizes precise control of the start and stop of the generator through the control of the platform generator button switch, platform I / O board, turntable controller and start and stop control socket. The modules work together to ensure the efficiency, stability and accuracy of power generation control, effectively meeting the needs of the platform in different power usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the power generation device for an aerial work platform of the present application; Figure 2 This is a schematic diagram of the structure of the power generation device for an aerial work platform of the present application; Figure 3 A logic diagram of the power generation control method of the present application; In the figure: 1. permanent magnet synchronous generator; 2. generator mounting bracket; 3. automatic tensioner mounting bracket; 4. automatic tensioner; 5. generator pulley; 6. belt; 7. engine pulley; 8. transformer filter; 9. inverter; 10. rectifier bridge; 11. mounting bracket. DETAILED DESCRIPTION

[0015] In order to facilitate the understanding of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0016] The present application is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect defined in this way can be combined with any other aspect or aspects, unless it is clearly stated that it cannot be combined. In particular, any feature that is considered to be preferred or advantageous can be combined with one or more other features that are considered to be preferred or advantageous.

[0017] In the description of the present application, it should be understood that the terms "inside", "outside", "up", "down", "left" and "right" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present application.

[0018] like Figure 1-2As shown, the present application provides a power generation device for an aerial work platform, which can provide stable power output for aerial work, including a generator 1, a generator mounting bracket 2, an automatic tensioner mounting bracket 3, an automatic tensioner 4, a generator pulley 5, a belt 6 and an engine pulley 7.

[0019] The generator mounting bracket 2 is fixed to the aerial work platform by bolts or welding, and the generator 1 is fixed to the generator mounting bracket 2 by bolts. The automatic tensioner mounting bracket 3 is fixed to the front end cover of the generator 1 by bolts, and the automatic tensioner 4 is fixed to the automatic tensioner mounting bracket 3. The generator pulley 5 is installed on the central axis of the generator 1, and the generator pulley 5 is circumferentially fixedly connected to the central axis of the motor 1 to avoid relative rotation between the generator pulley 5 and the central axis of the motor 1, thereby ensuring that the generator pulley 5 is correctly positioned and operated on the axis. There are many options for the specific connection method between the generator pulley 5 and the central axis of the motor 1, for example, a flat key, a wedge key or a spline connection can be used.

[0020] The engine pulley 7 is located at the front end of the engine crankshaft, and the engine pulley 7 is circumferentially fixedly connected to the engine crankshaft. The belt 6 is installed between the engine pulley 7 and the generator pulley 5. The automatic tensioner 4 can adjust the tension of the belt 6 between the engine pulley 7 and the generator pulley 5 to prevent the belt 6 from slipping and ensure the stable operation of the equipment. When the engine is running, the engine crankshaft drives the engine pulley 7 to rotate, and then transmits power to the generator pulley 5 through the belt 6, driving the generator 1 to rotate and generate AC power.

[0021] Preferably, the generator 1 is a permanent magnet synchronous generator, which has the advantages of high energy conversion efficiency and small size. At the same time, since the magnetic field generated by the permanent magnet is stable, the voltage and frequency output by the generator are also more stable.

[0022] Furthermore, the power generation device also includes a transformer filter 8, an inverter 9, a rectifier bridge 10 and a mounting bracket 11. The mounting bracket 11 is fixed to the aerial work platform by bolts, and the transformer filter 8, the inverter 9, and the rectifier bridge 10 are all fixed on the mounting bracket 11. At the same time, the rectifier bridge 10, the inverter 9, and the transformer filter 8 are electrically connected to the generator 1 in sequence. The rectifier bridge 10 is used to rectify the AC power output by the generator 1 into DC power and transmit it to the inverter 9. The inverter 9 is used to invert the DC power into AC power and transmit it to the transformer filter 8. The transformer filter 8 performs transformer filtering, frequency modulation, and voltage regulation on the AC power to output stable voltage and frequency. The power generation device also includes a distribution socket, which is electrically connected to the transformer filter 8.

[0023] Among them, the rectifier bridge 10 and the inverter 9 both have overcurrent, overvoltage, and undervoltage protection functions to ensure the safe operation of the entire power generation device. The transformer filter 8 has a wide range of voltage and frequency adjustment capabilities to adapt to power demand under different working conditions. For example, when the engine speed fluctuates greatly, the transformer filter 8 can quickly adjust the output voltage and frequency to maintain its stability.

[0024] In some embodiments, the rectifier bridge 10 may also be integrated into the generator 1 to further simplify the structure and improve the integration. Similarly, the transformer filter 8 and the inverter 9 may also be integrated into one component to reduce the number of connectors and reduce the cost.

[0025] The power generation device provided in the present application connects the engine and the generator 1 through a belt drive, utilizes the crankshaft rotation when the engine is working to drive the generator 1 to generate electricity, and rectifies, inverts, and performs frequency modulation and voltage modulation on the alternating current through a rectifier bridge 10, an inverter 9, and a transformer filter 8, and finally outputs a stable voltage and frequency. The device directly drives the generator 1 through a belt 6, which not only achieves efficient transmission, but also avoids the generation of heat loss. At the same time, the combined action of the rectifier bridge 10, the inverter 9, and the transformer filter 8 keeps the output voltage and frequency stable at all times, and even if the engine speed fluctuates, it will not affect the stable output of electricity. In addition, the device also uses a permanent magnet synchronous generator, which not only improves the energy conversion efficiency, but also achieves a smaller volume, so that it can easily adapt to the space layout requirements of a full range of vehicle models.

[0026] The present application also provides a power generation control system, including an input module, a control module and an output module. The input module includes a platform generator button switch, which is used to receive power generation control instructions; the control module includes a platform I / O board and a turntable controller, and the platform I / O board is used to process the input signal of the platform generator button switch and transmit it to the turntable controller through CAN communication; after receiving the start-stop signal, the turntable controller adjusts the engine speed to the target speed and outputs the generator control signal to the output module; the output module includes a generator start-stop control socket, which is used to cut off or restore the control circuit of the generator.

[0027] When the platform needs electricity, the operator turns the platform generator button switch, and the platform generator button switch transmits the start signal to the platform I / O board. After the platform I / O board processes the start signal, it transmits the signal to the turntable controller through CAN communication. After receiving the start signal, the turntable controller adjusts the engine speed to the target speed, where the target speed is the working speed of the generator, and outputs the generator control signal to the output module to control the generator to start.

[0028] Through the control of the platform generator button switch, platform I / O board, turntable controller and start-stop control socket, the precise control of the start and stop of generator 1 is realized. The coordinated work of various modules ensures the efficiency, stability and accuracy of power generation control, effectively meeting the needs of the platform in different power usage scenarios, avoiding unnecessary energy waste, and thus achieving energy saving and power saving effects.

[0029] like Figure 3 As shown, the present application also provides a power generation control method applied to the above-mentioned power generation control system, including the following steps: step S101, obtaining the power generation control instruction of the platform generator button switch; step S102, the platform I / O board receives and processes the power generation control instruction, and then transmits it to the turntable controller through CAN communication; step S103, after the turntable controller receives the start signal, it adjusts the engine speed to the target speed; step S104, the turntable controller outputs the generator control signal to control the start of the generator 1; step S105, the engine drives the generator 1 to rotate and generate electricity through a belt drive; step S106, the rectifier bridge 10 rectifies the AC power output by the generator 1 into DC power, the inverter 9 inverts the DC power into AC power, and the transformer filter 8 performs transformer filtering, frequency modulation and voltage regulation on the AC power to form a stable voltage and frequency output.

[0030] Furthermore, the method further includes step S107, after the turntable controller receives the start signal, the turntable controller controls each actuator of the aerial work platform to enter a locked state, so as to realize the interlocking of the generator and the whole vehicle action. It is ensured that during the start-up and operation of the generator 1, other actions of the platform are safely locked, thereby preventing mechanical conflicts, power fluctuations or safety hazards that may be caused by misoperation or multiple operations performed simultaneously. It is ensured that the generator 1 operates independently in the best state without being interfered by the actions of other systems, which greatly improves the working safety and operational stability of the entire system.

[0031] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, which fall within the scope of the present application to be protected. The scope of protection claimed in the present application is defined by the attached claims and their equivalents.

Claims

1. A power generation device for an aerial work platform, characterized in that: It includes an engine, a generator, an automatic tensioner and a belt. The generator is fixed on the aerial work platform through a generator mounting bracket. The automatic tensioner is fixed to the generator through an automatic tensioner mounting bracket. The belt is connected between the engine pulley of the engine and the generator pulley of the generator, and the tension is adjusted by the automatic tensioner. The power generation device also includes a rectifier bridge, an inverter and a transformer filter electrically connected to the generator. The rectifier bridge is used to rectify the alternating current output by the generator into direct current and transmit it to the inverter. The inverter is used to invert direct current into alternating current. The transformer filter is used to transform, filter, frequency and voltage modulate the alternating current into a stable voltage and frequency output.

2. The power generation device for an aerial work platform according to claim 1, characterized in that: The power generation device further comprises a power distribution socket, and the power distribution socket is electrically connected to the transformer filter.

3. The power generation device for an aerial work platform according to claim 1, characterized in that: The generator is a permanent magnet synchronous generator.

4. The power generation device for an aerial work platform according to claim 1, characterized in that: The belt is a multi-V belt.

5. A power generation control system, characterized in that: It comprises a power generation device for an aerial work platform as described in any one of claims 1 to 3, and an input module, including a platform generator button switch, for receiving power generation control instructions; a control module, including a platform I / O board and a turntable controller, the platform I / O board is used to process the input signal of the platform generator button switch and transmit it to the turntable controller through CAN communication, the turntable controller receives the start-stop signal and adjusts the engine speed according to the start-stop signal, and sends a generator control signal to the output module at the same time; the output module includes a generator start-stop control socket, which is used to cut off or restore the control circuit of the generator.

6. A power generation control method applied to the power generation control system according to claim 4, characterized in that: The following steps are involved: Obtain power generation control instructions from the platform generator button switch; The platform I / O board receives and processes the power generation control instructions, and then transmits them to the turntable controller through CAN communication; after receiving the start signal, the turntable controller adjusts the engine speed to the target speed; the turntable controller outputs the generator control signal to control the generator to start; the engine drives the generator to rotate and generate electricity through belt drive; the rectifier bridge rectifies the AC power output by the generator into DC power, the inverter inverts the DC power into AC power, and the transformer filter transforms, filters, modulates the frequency and voltage of the AC power to form a stable voltage and frequency output.

7. The power generation control method according to claim 5, characterized in that: The power generation control method also includes the following steps: after the turntable controller receives the start signal, the turntable controller controls each actuator of the aerial work platform to enter a locked state, thereby achieving interlocking of the generator and the entire vehicle.

8. An aerial work platform, characterized in that: It comprises the power generation control system as claimed in claim 4.

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