TWI728758B - Kinetic energy output system and its control method - Google Patents

Abstract

The invention discloses a kinetic energy output system and a control method thereof. The system includes a housing, a controller, a combination of a radial motor and an axial generator, and a rotational speed sensor for detecting the rotational speed of a flywheel rotor; the controller is arranged on the housing ; The combination of the radial motor and the axial generator is electrically connected to the controller. The combination of the radial motor and the axial generator includes a main shaft, a permanent magnet rotor, a stator fixing frame, a radial motor stator winding, a flywheel rotor, and a flywheel The heavy piece, the stator winding package disc and the rotor yoke poles; this system combines the radial motor and the axial generator to form an integrated structure, and has the flywheel function and the adjustable flywheel counterweight function, which can produce kinetic energy and electricity by itself. Using the controller to achieve inaccurate maintenance of the rated speed and inertia by means of intermittent pulse power transmission can save a lot of energy consumption and meet the energy saving requirements. The self-generated excess power of the system can be stored and used.

Description

Kinetic energy output system and its control method

The invention relates to the field of energy-saving system technology, in particular to a kinetic energy output system and a control method thereof.

Electric machinery (English: Electric machinery, commonly known as "motor") refers to an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. The motor is represented by the letter M (D in the old standard) in the circuit, and its main function is to generate driving torque as a power source for electrical appliances or various machinery.

As a common kinetic energy output system, electric motors generally suffer from energy consumption and do not meet the requirements of energy saving. Therefore, it is necessary to improve the current kinetic energy output system.

In view of this, the main purpose of the present invention is to provide a kinetic energy output system and its control method, which can effectively solve the energy consumption problem of the existing power output system in view of the defects of the prior art.

In order to achieve the above objectives, the present invention adopts the following technical solutions:

A kinetic energy output system includes a housing, a controller, a combination of a radial motor and an axial generator, and a rotation speed for detecting the rotation speed of the flywheel rotor The sensor; the controller is arranged on the housing; the radial motor and the axial generator combined body is electrically connected to the controller, the radial motor and the axial generator combined body includes a main shaft, a permanent magnet rotor , Stator fixed frame, a radial motor stator winding, two flywheel rotors, two flywheel counterweights, stator winding packaging discs and two rotor yoke poles; the main shaft is rotatably arranged in the housing, and the output of the main shaft The permanent magnet rotor is sleeved outside the main shaft; the stator fixing frame is sleeved outside the main shaft; the stator fixing frame is located on the periphery of the permanent magnet rotor and is fixedly installed with the casing; the permanent magnet The rotor is rotatably arranged relative to the stator fixing frame; the radial motor stator winding is arranged on the stator fixing frame; the two flywheel rotors are sleeved on the main shaft and fixed to the main shaft, and the two flywheel rotors are respectively located on the stator fixing frame. The two sides of the frame are fixedly connected to both sides of the permanent magnet rotor; the two flywheel counterweights are respectively detachably mounted on the outer surfaces of the two flywheel rotors; the stator winding package disk and the magnetic poles of the two rotor yokes are both It is sleeved on the main shaft and located between the two flywheel rotors, the stator winding package disk is located between the two rotor yoke magnetic poles, and the two rotor yoke magnetic poles are respectively fixed to the inner sides of the two flywheel rotors; The sensor is arranged in the housing, and the rotational speed sensor is connected to the controller.

Preferably, an electromagnetic clutch is installed at the output end of the main shaft, and the electromagnetic clutch is located outside the housing and connected to the controller.

Preferably, the flywheel counterweight is ring-shaped.

Preferably, the controller is also connected with a super capacitor bank for receiving the kinetic energy feedback power of a radial motor and a lithium battery for receiving power from an axial generator. group.

Preferably, there are two groups of the super capacitor group, and two groups of the lithium battery group.

Preferably, the controller is connected to a personal computer through an interface/RS485.

A control method of a kinetic energy output system adopts the aforementioned kinetic energy output system. First, the speed sensor detects the speed of the two flywheel rotors, starts the radial motor to reach the rated speed, and stops power supply. When the speed sensor When the measured speed drops to a preset value, the controller sends power to the motor radially to drive the flywheel rotors in an intermittent pulse mode until the flywheel rotors reach the rated speed.

Preferably, when the radial motor stops transmitting power and the two flywheel rotors rotate with inertia as kinetic energy, the electric power is generated and fed back to the controller, which is distributed to the super capacitor group as the power source of the two flywheel rotors To store energy, set the capacity of the super capacitor group to be more than 1000% of the rated speed current after the two flywheel rotors are started, and have two groups of super capacitor groups. When one group is discharged, the other group is charged. When the controller detects that the discharge is the insufficient power of the super capacitor bank, the super capacitor bank with sufficient power takes over the work of the super capacitor bank with insufficient power, and the super capacitor bank with insufficient power starts to charge, and the two super capacitor banks are charged. Alternate work and fast charging and discharging of super capacitors can meet the above requirements.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be known from the above technical solutions:

This system combines the radial motor and the axial generator to form an integrated structure, and has a flywheel function and an adjustable flywheel counterweight function. It can produce kinetic energy and electricity by itself, and cooperate with the controller to transmit power with intermittent pulses. The way to complete the inaccurate maintenance of rated speed and inertia can save a lot of energy consumption and meet the energy saving requirements. The self-generated excess power of this system can be stored and used. The inertia kinetic energy generated for a long time without interruption can be matched with the transmission system and the transmission system. Machines that are not sensitive to speed requirements but need to run for a long time are used as power sources (water pumps, air pumps, ventilation fans, air-conditioning compressors, small axial or radial power generation systems, punch presses that match the frequency of pulse transmission), and the system can It can be used as an uninterruptible power system and can be used in parallel.

In order to explain the structural features and effects of the present invention more clearly, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

10: Shell

20: Controller

201: Controllable dry contact

30: Combination of radial motor and axial generator

31: Spindle

32: Permanent magnet rotor

33: stator fixing frame

34: Radial motor stator winding

35: flywheel rotor

36: flywheel counterweight

37: Stator winding package disk

38: Rotor yoke pole

40: Speed sensor

51: Super capacitor bank

52: Lithium battery pack

53: Interface/RS485

54: personal computer

55: Electromagnetic clutch

7: Peripheral objects

8: Kinetic energy load

9: Electric load

The other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: FIG. 1 is an assembled perspective view of a preferred embodiment of the present invention; FIG. 2 is a schematic view of a preferred embodiment of the present invention Exploded view; and Figure 3 is a schematic diagram of the control principle of a preferred embodiment of the present invention.

Before the new model is described in detail, it should be noted in the following description In, similar elements are represented by the same numbers.

Please refer to FIGS. 1 to 3, which show the specific structure of a kinetic energy output system according to a preferred embodiment of the present invention, including a housing 10, a controller 20, a radial motor and an axial generator combined body 30 and a speed sensor 40. The radial motor and axial generator combination 30 is formed by combining the radial motor and the axial generator.

The controller 20 is arranged on the housing 10; the controller 20 is also connected with a super capacitor bank 51 for receiving the kinetic energy feedback power of the radial motor and a lithium battery bank 52 for receiving the power of the axial generator. . The super capacitor group 51 is two groups, and the lithium battery group 52 is also two groups. The super capacitor group 51 and the lithium battery group 52 are both charging and discharging modules. The lithium battery group 52 corresponds to all In the axial generator, the super capacitor bank 51 corresponds to the radial motor charging and discharging and accepts kinetic energy to recharge the working power. If one of the super capacitor bank 51 and the lithium battery bank 52 fails, The controller 20 can be switched and replaced. The super capacitor pack 51 and the lithium battery pack 52 are like array hard disks, and the control method is like a hot plug function. And, the controller 20 can be connected to a personal computer 54 through an interface/RS485 53, so that when multiple machines simultaneously perform kinetic energy or power output for the same load or different loads, they can be set or used in parallel or in groups. It can be used as master-slave control or synchronous control; the controller 20 has 8-16 groups of controllable dry contacts 201 to connect with peripheral objects 7 to realize active control; of course, the controller 20 can also be disconnected from the personal computer 54 The connection is opened to work offline, and is controlled by the internal program of the controller 20. The controller 20 can control the pulse generation cycle In terms of duration and intensity, the controller 20 can control the operating mode of the radial motor by adjusting the operating power input to the radial motor and the value of pulses.

The radial motor and axial generator combined body 30 is electrically connected to the controller 20. The radial motor and axial generator combined body 30 includes a main shaft 31, a permanent magnet rotor 32, a stator fixing frame 33, and a The radial motor stator winding 34, two flywheel rotors 35, two flywheel counterweight plates 36, stator winding package disk 37, and two rotor yoke magnetic poles 38.

The main shaft 31 is rotatably arranged in the housing 10, and the output end of the main shaft 31 extends outwards from the housing 10; in this embodiment, the output end of the main shaft 31 is installed with an electromagnetic clutch 55, the electromagnetic clutch 55 It is located outside the housing 10 and connected to the controller 20 to be controlled by the controller 20.

The permanent magnet rotor 32 is sleeved outside the main shaft 31; the stator fixing frame 33 is sleeved outside the main shaft 31, the stator fixing frame 33 is located on the periphery of the permanent magnet rotor 32 and is fixedly installed with the housing 10, the permanent magnet The rotor 32 is rotatably arranged relative to the stator fixing frame 33; the radial motor stator winding 34 is arranged on the stator fixing frame 33.

The two flywheel rotors 35 are sleeved on the main shaft 31 and fixed to the main shaft 31. The two flywheel rotors 35 are respectively located on two sides of the stator fixing frame 33 and fixedly connected to both sides of the permanent magnet rotor 32; The flywheel weight plates 36 are detachably mounted on the outer surfaces of the two flywheel rotors 35; in this embodiment, the flywheel weight plates 36 are ring-shaped, and flywheel weight plates 36 of different specifications and weights can be selected according to the load. , From the kinetic energy formula Ek=(mv ² )/2, we can see that the heavier the weight m, the higher the speed v, the greater the kinetic energy Ek.

The stator winding packaging disk 37 and the two rotor yoke magnetic poles 38 are both sleeved on the main shaft 31 and located between the two flywheel rotors 35. The stator winding packaging disk 37 is located between the two rotor yoke magnetic poles 38. The two rotor yoke magnetic poles 38 are respectively fixed to the inner sides of the two flywheel rotors 35. The two rotor yoke magnetic poles 38, the two flywheel rotors 35 and the permanent magnet rotor 32 form an integrated structure, so that the radial motor and the The axial generator can share the rotor.

The rotational speed sensor 40 is disposed in the housing 10, the rotational speed sensor 40 is connected to the controller 20, and the rotational speed sensor 40 is used to detect the rotational speed of the flywheel rotors 35.

The present invention also discloses a control method of the kinetic energy output system. The aforementioned kinetic energy output system is adopted. First, the speed sensor 40 detects the speed of the flywheel rotors 35, starts the radial motor and stops after reaching the rated speed. When the rotation speed measured by the rotation speed sensor 40 drops to a preset value (about 80-90% of the rated rotation speed, which can be adjusted and set by the controller 20 as required), the controller 20 uses intermittent pulses (power transmission time and The generation cycle is calculated by the control chip or manually set) to drive the flywheel rotors 35 (pulse voltage or frequency higher than the rated power specification 10-25% can be adjusted) to drive the flywheel rotor 35, and use intermittent pulse power transmission to drive the flywheel rotor 35 Wait for the flywheel rotor 35 until the flywheel rotor 35 reaches the rated speed (the error can be controlled within ±1-2%). Because it is not accurate to maintain the rated speed and inertia, it is done by means of intermittent pulse power transmission, Therefore, it can save a lot of energy and meet the energy-saving requirements, and the inertia kinetic energy generated without interruption for a long time can be matched with the transmission system and the transmission system to give a kinetic energy load that is not sensitive to the speed requirements but needs to run for a long time (such as water pumps). , Air pumps, ventilation fans, air-conditioning compressors, small axial or radial power generation systems, punch presses that match the frequency of pulse transmission, etc.) as power sources.

Specifically, when the flywheel counterweight 36 with a certain mass m (m=ρV, ρ is the material density of the flywheel counterweights 36, and V is the volume of the flywheel counterweights 36) starts to reach the rated speed, Use the stored inertia I (I=mr ² , m is the mass of the flywheel counterweight, r is the vertical distance between the mass point and the main shaft) to maintain the 36 speed of the flywheel counterweight, and the rotational kinetic energy generated = ½Iω ² , where I is the inertia , Ω is the rotational angular velocity. After the power supply is stopped, the rotational speed of the permanent magnet rotor of the radial motor is slowly reduced to the set range by the air and bearing resistance, and then the rotational speed and the generated inertia are maintained by intermittent pulse power supply. When the radial motor stops transmitting power to the flywheel rotors 35 and makes them rotate using inertia as kinetic energy, the electric power generated by the radial motor is fed back to the controller 20, and the controller 20 distributes the power to the flywheel rotors 35 as the power source. The super capacitor bank 51 is used to store energy, and the capacitance of the super capacitor bank 51 is set to be more than 1000% of the rated speed current after the flywheel rotor 35 is started. The rated speed can be set according to the size of the load. The speed setting cannot be greater than the maximum speed of the system, and there are two sets of super capacitor groups 51. When one group is discharged, the other group is charged. The controller 20 detects that the discharge is that the super capacitor group 51 is insufficient. The super capacitor bank 51 with electric power takes over the work of the super capacitor bank 51 with insufficient power, and the super capacitor bank 51 with insufficient power starts to charge. The two super capacitor banks 51 work alternately, with the characteristics of fast charging and discharging of super capacitors. Meet the above needs.

In order to reduce the excessive inertia kinetic energy consumed by the magnetoresistance generated during the recharging force, and to take full advantage of the direct and fast charging of the supercapacitor group 51, the kinetic energy recharging mode can be set separately (kinetic energy saving mode). When the rotation speed of the rotor 35 drops to 50% of the pulse generation set point (chip calculation or manual setting of the starting point of pulse discharge acceleration), the controller 20 cuts off the recharging power supply circuit, and stops charging the super capacitor bank 51 to reduce The influence of magnetoresistance on the inertia kinetic energy consumption during power generation and recharging, in this way until the super capacitor bank 51 is fully charged.

When the load needs to be greater than the rated torque T (T=9550*P/n, P is the power kW, n is the speed r/min), additional flywheel counterweights 36 can be installed on the flywheel rotors 35 to adjust The mass of the flywheel rotor 35 can adjust the torque output.

The rotor or stator of the axial generator has no iron core and no reluctance torque characteristics between the stator and the rotor. The large-diameter radial motor flywheel rotor structure generates large inertia and large moments, which can easily drive the installation in For the permanent magnet yoke rotor of the axial generator with a small diameter at the shaft center, the controller 20 will be connected to the kinetic energy load 8 (mechanical) or electric power after the radial motor starts to reach the rated speed and has high inertia. Load 9, due to the use of lever and high torque of rotational inertia to offset the magnetic field control of the axial generator With dynamic torque, a small axial generator with full load output can be easily driven. The controller 20 controls the lithium battery pack 52 to invert to generate AC power to output to the electrical load 9.

When only using the power output function, it can be set to shut down after sufficient energy storage. The shutdown period and time are determined by the load energy consumption speed and the energy storage system capacity. When energy storage is needed, it can be restarted.

The design focus of the present invention is: the system combines the radial motor and the axial generator to form an integrated structure, and has a flywheel function and an adjustable flywheel counterweight function. It can produce kinetic energy and electricity by itself, and use it together. The controller 20 completes the inaccurate maintenance of the rated speed and inertia by means of intermittent pulse power transmission, which can save a lot of energy consumption and meet the energy-saving requirements. The self-generated excess power of the system can be stored and used, and the inertia kinetic energy generated without interruption for a long time, It can be matched with a transmission system and a variable speed system to act as a power source (water pump, air pump, ventilation fan, air-conditioning compressor, small axial or radial power generation system) for those kinetic energy loads that are not very sensitive to speed requirements but need to run for a long time. , A punch with the frequency of pulse power transmission), and this system can be used as an uninterrupted power system, and can be used in parallel.

The technical principle of the present invention has been described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention, and cannot be construed as limiting the protection scope of the present invention in any way. Based on the explanation here, those skilled in the art can think of other specific implementation manners of the present invention without creative work, and these manners will fall within the protection scope of the present invention.

10: Shell

20: Controller

30: Combination of radial motor and axial generator

31: Spindle

32: Permanent magnet rotor

33: stator fixing frame

34: Radial motor stator winding

35: flywheel rotor

36: flywheel counterweight

37: Stator winding package disk

38: Rotor yoke pole

40: Speed sensor

55: Electromagnetic clutch

Claims (8)

A kinetic energy output system includes a housing, a controller, a combination of a radial motor and an axial generator, and a rotational speed sensor for detecting the rotational speed of a flywheel rotor; the controller is arranged on the housing and intermittently The combination of radial motor and axial generator is electrically connected to the controller in a pulse mode. The combination of radial motor and axial generator includes a main shaft, A permanent magnet rotor, a stator fixing frame, a radial motor stator winding, two flywheel rotors, two flywheel counterweights, stator winding packaging discs and two rotor yoke poles; the main shaft is rotatably arranged in the housing, The output end of the main shaft extends outward from the casing; the permanent magnet rotor is sleeved outside the main shaft; the stator fixing frame is sleeved outside the main shaft, and the stator fixing frame is located on the periphery of the permanent magnet rotor and is fixed to the casing Installation, the permanent magnet rotor is rotatably arranged relative to the stator fixing frame; the radial motor stator winding is arranged on the stator fixing frame; the two flywheel rotors are sleeved on the main shaft and fixed with the main shaft, the two flywheel rotors They are respectively located on both sides of the stator fixing frame and respectively fixedly connected to both sides of the permanent magnet rotor; the two flywheel counterweights are respectively detachably mounted on the outer sides of the two flywheel rotors; the stator winding package disk and the two The magnetic poles of the rotor yoke are sleeved on the main shaft and located between the two flywheel rotors, and the stator winding package disk is located Between the two rotor yoke magnetic poles, the two rotor yoke magnetic poles are respectively fixed to the inner side surfaces of the two flywheel rotors; the rotational speed sensor is arranged in the housing, and the rotational speed sensor is connected to the controller. The kinetic energy output system according to claim 1, wherein an electromagnetic clutch is installed at the output end of the main shaft, and the electromagnetic clutch is located outside the housing and connected to the controller. The kinetic energy output system according to claim 1, wherein the flywheel counterweight is ring-shaped. The kinetic energy output system according to claim 1, wherein the controller is further connected with a super capacitor group for receiving the kinetic energy feedback power of a radial motor and a lithium battery group for receiving the power of an axial generator. The kinetic energy output system according to claim 4, wherein the super capacitor group is two groups, and the lithium battery group is also two groups. The kinetic energy output system according to claim 1, wherein the controller is connected to a personal computer through an interface/RS485. A control method of a kinetic energy output system, wherein the kinetic energy output system as described in any one of claim items 1-6 is adopted, and the rotation speed of the two flywheel rotors is first detected by the rotation speed sensor, and the radial motor is started to reach the After the rated speed, the power supply is stopped. When the speed measured by the speed sensor drops to a preset value, the controller transmits power to the radial motor in intermittent pulse mode to drive the flywheel rotors, and uses intermittent pulse power transmission to drive the flywheel rotors. Flywheel rotors until the flywheel rotors reach the rated speed. The control method of the kinetic energy output system according to claim 7, wherein when the radial motor stops transmitting power and the two flywheel rotors rotate with inertia as kinetic energy, the electric power is generated and fed back to the controller, and the controller distributes Store energy for the super capacitor group as the power source of the two flywheel rotors, set the capacity of the super capacitor group to be more than 1000% of the rated speed current after the two flywheel rotors are started, and have two sets of super capacitor groups. The capacitor group is charged when one group is discharged and the other group is charged. When the controller detects that the discharge is the insufficient power of the super capacitor group, the super capacitor group with sufficient power will take over the work of the super capacitor group with insufficient power. The super capacitor bank starts to charge, and the two super capacitor banks work alternately.

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