CN112615382A - Vibrating screen energy processing equipment and method and vibrating screen - Google Patents
Vibrating screen energy processing equipment and method and vibrating screen Download PDFInfo
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- CN112615382A CN112615382A CN202011500576.6A CN202011500576A CN112615382A CN 112615382 A CN112615382 A CN 112615382A CN 202011500576 A CN202011500576 A CN 202011500576A CN 112615382 A CN112615382 A CN 112615382A
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- 238000012545 processing Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims description 24
- 238000003672 processing method Methods 0.000 claims abstract description 5
- 238000004146 energy storage Methods 0.000 claims description 59
- 239000003990 capacitor Substances 0.000 claims description 40
- 238000001514 detection method Methods 0.000 claims description 21
- 238000010336 energy treatment Methods 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 description 8
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- 239000000463 material Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000012216 screening Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003116 impacting effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
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- 238000002360 preparation method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/1423—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle with multiple batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/24—Controlling the direction, e.g. clockwise or counterclockwise
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention relates to the technical field of vibrating screens, and provides vibrating screen energy processing equipment, a vibrating screen energy processing method and a vibrating screen, wherein the vibrating screen comprises a bus power supply and a vibrating screen motor, the bus power supply and the vibrating screen motor are electrically connected through a three-phase circuit to form a main loop, and the vibrating screen energy processing equipment is connected to the three-phase circuit; the vibrating screen energy processing equipment is suitable for absorbing electric energy generated by the vibrating screen motor during braking from the main loop when the vibrating screen motor is in a braking state and releasing the electric energy to the main loop when the vibrating screen motor is in a normal working state. When the vibrating screen motor is switched between positive rotation and negative rotation, electric energy generated by the vibrating screen motor due to positive and negative rotation braking is absorbed by the vibrating screen energy processing equipment, and when the vibrating screen motor works normally, the vibrating screen energy processing equipment releases the electric energy to the main loop, so that the impact of the electric energy on the vibrating screen system and a power grid is prevented, and the normal operation of the vibrating screen system and the power grid is realized.
Description
Technical Field
The invention relates to the technical field of vibrating screens, in particular to a vibrating screen energy processing device and method and a vibrating screen.
Background
Vibrating screens are commonly used to vibrationally classify aggregates delivered from hot aggregate elevators according to their particle size for precise metering and grading prior to agitation; wherein, the sieves with different mesh sizes in the vibrating screen are overlapped, the sieve mesh is larger on the upper part, and the sieve mesh is smaller the lower.
In the actual production process, the motor of the vibrating screen can be switched between positive rotation and negative rotation according to specific requirements. In the switching process, the kinetic energy of the vibrating screen is converted into electric energy, and the electric energy is released everywhere and can generate large impact on electrical equipment and a power grid, so that the normal operation of a vibrating screen system and the power grid is influenced.
Disclosure of Invention
The invention solves the problem of how to design a vibrating screen energy processing device which can process the electric energy generated by a vibrating screen motor due to braking so as to ensure that a vibrating screen system and a power grid are stable.
In order to solve the problems, the invention provides energy processing equipment for a vibrating screen, which is applied to the vibrating screen, wherein the vibrating screen comprises a bus power supply and a vibrating screen motor, the bus power supply is electrically connected with the vibrating screen motor through a three-phase circuit to form a main loop, the energy processing equipment is connected to the three-phase circuit, and the energy processing equipment is suitable for absorbing electric energy generated by the vibrating screen motor in braking from the main loop when the vibrating screen motor is in a braking state and releasing the electric energy to the main loop when the vibrating screen motor is in a normal working state.
Therefore, the bus power supply is electrically connected with the vibrating screen motor through the three-phase circuit and forms a main loop, so that the bus power supply provides a power supply for the work of the vibrating screen motor; by connecting the energy processing equipment to the three-phase circuit, when the vibrating screen motor performs forward and reverse rotation switching braking, electric energy generated by the vibrating screen motor due to the forward and reverse rotation braking is absorbed by the vibrating screen energy processing equipment, so that the electric energy is prevented from impacting an original vibrating screen system and a power grid, the vibrating screen system and the power grid are ensured to be stable, and the normal operation of the vibrating screen system and the power grid is realized; when the vibrating screen motor is in a normal operation mode, the vibrating screen energy processing equipment releases the absorbed electric energy to the main loop, so that the absorbed electric energy is recycled, the electric energy is released in time, and energy storage preparation is made for next absorption of the electric energy.
Optionally, the energy processing equipment of the vibrating screen comprises an electric energy storage assembly and a control assembly, the control assembly is electrically connected with the electric energy storage assembly, the control assembly is suitable for controlling the electric energy storage assembly to absorb electric energy generated by braking of the vibrating screen motor from the main loop when the vibrating screen motor is in a braking state, and controlling the electric energy storage assembly to release the electric energy from the main loop when the vibrating screen motor is in a normal working state.
Optionally, the electric energy storage assembly includes a rectifying device, a chopping device and an electric energy storage device, which are electrically connected in sequence, and the rectifying device is connected to the three-phase circuit.
Optionally, the three-phase circuit includes an a-phase cable, a B-phase cable and a C-phase cable, the rectifying device includes a first bipolar transistor, a second bipolar transistor, a third bipolar transistor, a fourth bipolar transistor, a fifth bipolar transistor and a sixth bipolar transistor, an emitter of the first bipolar transistor and a collector of the second bipolar transistor are electrically connected to the a-phase cable, an emitter of the third bipolar transistor and a collector of the fourth bipolar transistor are electrically connected to the B-phase cable, an emitter of the fifth bipolar transistor and a collector of the sixth bipolar transistor are electrically connected to the C-phase cable, and a collector of the first bipolar transistor, a collector of the third bipolar transistor and a collector of the fifth bipolar transistor are commonly connected to the positive input terminal of the chopping device, the emitter of the second bipolar transistor, the emitter of the fourth bipolar transistor and the emitter of the sixth bipolar transistor are connected to the negative input end of the chopper device.
Optionally, the chopper device includes a seventh bipolar transistor, an eighth bipolar transistor, and a fourth inductor, a collector of the seventh bipolar transistor is electrically connected to a collector of the fifth bipolar transistor, an emitter of the eighth bipolar transistor and the electric energy storage device are commonly connected to an emitter of the sixth bipolar transistor, an emitter of the seventh bipolar transistor and a collector of the eighth bipolar transistor are both electrically connected to one end of the fourth inductor, and the other end of the fourth inductor is electrically connected to an anode of the electric energy storage device.
Optionally, the three-phase circuit further comprises a filter device, and the filter device is arranged between the rectifying device and the three-phase circuit.
Optionally, the filter device includes a first inductor, a second inductor, and a third inductor, the first inductor, the second inductor, and a first end of the third inductor respectively with a phase cable, and a phase cable, the second inductor, and a second end of the third inductor are short-circuited, and a third end of the first inductor, the second inductor, and a third end of the third inductor respectively with an emitter of the first bipolar transistor, an emitter of the third bipolar transistor, and an emitter of the fifth bipolar transistor are electrically connected.
Optionally, the vibrating screen energy processing apparatus further comprises a dc load, and the dc load is connected between the rectifying device and the chopping device.
Optionally, the system further comprises a voltage detection device and a main control device, wherein the voltage detection device is electrically connected with the three-phase circuit, and the main control device is electrically connected with the voltage detection device and the electric energy storage assembly respectively.
In a second aspect, the present invention further provides a method for processing energy of a vibrating screen, which is applied to the vibrating screen energy processing apparatus, and the method for processing energy of a vibrating screen includes:
determining the running state of a vibrating screen motor;
when the running state of the vibrating screen motor is a braking state, absorbing electric energy generated by braking of the vibrating screen motor from a main loop;
and when the running state of the vibrating screen motor is a normal working state, releasing the electric energy to the main loop.
Therefore, the vibrating screen energy processing method is applied to the vibrating screen energy processing equipment for processing, and at least has the whole technical effects of the vibrating screen energy processing equipment.
Optionally, acquiring a bus voltage of the main loop;
the determining an operating state of a shaker motor includes:
when the bus voltage is higher than a preset charging set value, determining that the running state of the vibrating screen motor is a braking state;
and when the bus voltage is lower than a preset charging end set value and is greater than 0, determining that the running state of the vibrating screen motor is a normal working state.
Optionally, the method of shaker energy treatment further comprises:
acquiring the bus voltage of the main loop;
the determining an operating state of a shaker motor includes:
when a forward and reverse rotation switching instruction is received, determining that the running state of the vibrating screen motor is a braking state, and absorbing electric energy generated by braking of the vibrating screen motor from a main loop;
and when the bus voltage is lower than a preset charging end set value and is greater than 0, determining that the running state of the vibrating screen motor is a normal working state.
Optionally, the shaker energy treatment apparatus comprises a supercapacitor;
when the running state of shale shaker motor is the braking state, absorb the electric energy that the braking of shale shaker motor produced from the major loop, include:
when the vibrating screen motor is in a braking state and the electric storage capacity of the super capacitor is 0, controlling the super capacitor to absorb electric energy generated by braking of the vibrating screen motor from a main loop in a constant current mode;
when the vibrating screen motor is in a braking state and the voltage of the super capacitor is greater than a preset upper limit voltage value, the super capacitor is controlled to absorb electric energy generated by braking of the vibrating screen motor from the main loop in a constant voltage mode.
In a third aspect, the invention further provides a vibrating screen, which comprises a bus power supply, a three-phase circuit of a vibrating screen motor and the vibrating screen energy processing equipment, wherein the bus power supply is electrically connected with the vibrating screen motor through the three-phase circuit to form a main loop, and the energy processing equipment is connected to the three-phase circuit.
Therefore, the vibrating screen comprises the bus power supply, the vibrating screen motor, the three-phase circuit and the vibrating screen energy processing equipment, so that at least the whole technical effect of the vibrating screen energy processing equipment is achieved.
Optionally, the energy processing device further comprises a forward and reverse rotation assembly, two ends of the forward and reverse rotation assembly are respectively electrically connected with the bus power supply and the vibrating screen motor, and the vibrating screen energy processing device is connected between the bus power supply and the forward and reverse rotation assembly or between the forward and reverse rotation assembly and the vibrating screen motor.
Drawings
FIG. 1 is a circuit diagram of a reverse brake in a prior art shaker system;
FIG. 2 is a circuit diagram of a parallel resistance box in a prior art shaker system;
FIG. 3 is one of the circuit diagrams of a shaker in an embodiment of the present invention;
FIG. 4 is a second circuit diagram of a shaker in accordance with an embodiment of the present invention;
FIG. 5 is a functional block diagram of a method of energy treatment of a shaker in an embodiment of the present invention;
FIG. 6 is a logic block diagram of a method of vibrating screen energy handling in an embodiment of the present invention.
Description of reference numerals:
1-a rectifying device; 2-a chopper device; 3-an electrical energy storage device; 4-a filter device; 5-a voltage detection device; 6-a master control device; 7-current transformer.
Detailed Description
At present, the vibrating screening device of an asphalt plant functions as: the aggregates delivered by the hot aggregate elevator are classified according to particle size so as to be accurately metered and graded before being stirred.
The structure of the vibrating screening device is as follows: the sieves with different mesh sizes are overlapped, the mesh is larger on the upper part, and the mesh is smaller the lower part. The first screen is a coarse screen, the aggregate exceeding the specification is discarded, the aperture of other screens is gradually reduced from top to bottom, and the bottommost screen is a sand screen.
The vibration screening device is characterized in that: the material is firstly screened on the screen surface of the large screen hole, the screen surface of the large screen hole is firm and wear-resistant, and the material of fine fraction is conveyed to the screen surface of the small screen hole through the shunt of the plurality of layers of screens, so that the screen surface of the small screen hole is protected from being damaged. The structure is compact, and the occupied area is small.
The vibrating screen is vibrated by a motor, and the vibration mode of the vibrating screen can be divided into a forward rotation mode (forward rotation) and a reverse rotation mode (reverse rotation) according to the relative motion relation with material flow;
when the vibrating screen rotates forwards, the running speed of the hot aggregate is increased, so that the production capacity is increased, but the screening efficiency is reduced; when the shaker is reversed, the speed of travel of the hot aggregate is reduced, which reduces throughput, but increases screening efficiency.
However, in the actual production process, the vibrating screen can be switched between positive rotation and negative rotation according to specific requirements. During the switching process, the kinetic energy of the vibrating screen is converted into electric energy, and the electric energy is released everywhere, so that large impact can be formed on electrical equipment and a power grid. At this stage, the following two methods are generally adopted for processing the electric energy:
first, as shown in fig. 1, a braking circuit is connected in parallel between a bus power supply and a vibrating screen motor, so that electric energy generated during braking is fed back to a grid serving as the bus power supply to be consumed by other electric devices. However, the reverse connection braking circuit is used for processing, so that the bus voltage can be directly increased by electric energy generated in the reverse connection braking process, the specification of electric equipment needs to be increased, the cost is increased, and the electric energy is in an uncontrollable state and has certain risks.
Secondly, as shown in fig. 2, a braking resistor box is connected in parallel to a power supply end bus of a vibrating screen motor, and electric energy generated during braking is consumed by heating of a braking resistor; the brake resistor box is an electronic device, and is mainly applied to dynamic braking of a high-power frequency conversion device, and is not described herein for the prior art. However, in the way of braking the resistance box in parallel, the electric energy generated by the vibrating screen motor is consumed through the resistance, which not only causes energy waste, but also causes the temperature near the resistance box to be higher, thereby causing influence on other electric elements.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the terms "an embodiment," "one embodiment," and "one implementation," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or implementation is included in at least one embodiment or example implementation of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.
In order to solve the technical problem, referring to fig. 3, an embodiment of the present invention provides a vibrating screen energy processing device, which is applied to a vibrating screen, where the vibrating screen includes a bus power supply and a vibrating screen motor M, the bus power supply and the vibrating screen motor M are electrically connected through a three-phase circuit and form a main loop, and the vibrating screen energy processing device is connected to the three-phase circuit; the vibrating screen energy processing equipment is suitable for absorbing electric energy generated by the vibrating screen motor M during braking from the main loop when the vibrating screen motor M is in a braking state, and releasing the electric energy to the main loop when the vibrating screen motor M is in a normal working state.
It should be noted that the bus power supply is a power grid bus of a mains supply, the vibrating screen motor M is used for driving a screen in the vibrating screen to vibrate, the bus power supply is used for providing a working power supply for the vibrating screen motor M, the vibrating screen motor M is a three-phase alternating current motor, the rated voltage of the vibrating screen motor M is matched with the voltage of the bus power supply, and when the rated voltage of the vibrating screen motor is alternating current 380V, the voltage of the bus power supply is 380V; the vibration sieve motor M is electrically connected with the bus power supply through a three-phase circuit to form a main loop, so that the bus power supply provides a power supply for the work of the vibration sieve motor M; when the vibrating screen motor M is braked by switching forward and reverse rotation, three-phase alternating current energy generated by the vibrating screen motor due to the braking of the forward and reverse rotation is absorbed by the vibrating screen energy processing equipment, so that the three-phase alternating current energy is prevented from impacting an original vibrating screen system and a power grid, the vibrating screen system and the power grid are ensured to be stable, and the normal operation of the vibrating screen system and the power grid is realized; when the vibrating screen motor M is in a normal operation mode, the vibrating screen energy processing equipment releases the absorbed three-phase alternating current electric energy to the main loop, so that the absorbed electric energy is recycled, the electric energy is released in time, and energy storage preparation is made for next absorption of the electric energy.
In one embodiment of the invention, the shaker energy processing apparatus includes an electrical energy storage assembly and a control assembly, the control assembly being electrically connected to the electrical energy storage assembly, the control assembly being adapted to control the electrical energy storage assembly to absorb electrical energy generated by braking of the shaker motor M from the primary circuit when the shaker motor M is in a braking state, and to control the electrical energy storage assembly to release electrical energy to the primary circuit when the shaker motor M is in a normal operating state.
It should be noted that when the vibrating screen motor M is in forward and reverse rotation switching, three-phase alternating current electric energy is generated due to braking and fed back to the main loop, the control component controls the electric energy storage component to absorb the three-phase alternating current electric energy generated by braking of the vibrating screen motor M from the main loop, and when the vibrating screen motor M returns to be in a normal working state, the control component controls the electric energy storage component to release the absorbed three-phase alternating current electric energy to the main loop, so that the three-phase alternating current electric energy generated by braking of the vibrating screen motor M is absorbed and reused, energy saving is realized, and the voltage stability of a power grid serving as a bus power supply is also ensured.
In one embodiment of the invention, the electric energy storage assembly comprises a rectifying device 1, a chopper device 2 and an electric energy storage device 3 which are electrically connected in sequence, the rectifying device 1 being connected to the three-phase circuit.
It should be noted that, three-phase ac electric energy generated by the vibrating screen motor M during braking is rectified into dc electric energy by the rectifier device 1, and then the dc electric energy is stepped down into another dc electric energy or a dc electric energy with adjustable voltage by the chopper device 2 and is charged in the electric energy storage device 3, so that the electric energy generated by the vibrating screen motor M due to braking is stored in the electric energy storage device 3 through the electric energy storage component, thereby preventing the electric energy from impacting the original vibrating screen system and the power grid, ensuring the stability of the vibrating screen system and the power grid, and realizing the normal operation of the vibrating screen system and the power grid.
In an embodiment of the invention, as shown in fig. 4, the three-phase circuit includes an a-phase cable, a B-phase cable, and a C-phase cable (not shown), the rectifier device 1 includes a first bipolar transistor IGBT1, a second bipolar transistor IGBT2, a third bipolar transistor IGBT3, a fourth bipolar transistor IGBT4, a fifth bipolar transistor IGBT5, and a sixth bipolar transistor IGBT6, an emitter of the first bipolar transistor IGBT1 and a collector of the second bipolar transistor IGBT2 are electrically connected to the a-phase cable, an emitter of the third bipolar transistor IGBT3 and a collector of the fourth bipolar transistor IGBT4 are electrically connected to the B-phase cable, an emitter of the fifth bipolar transistor IGBT5 and a collector of the sixth bipolar transistor IGBT6 are electrically connected to the C-phase cable, a collector of the first bipolar transistor 1, a collector of the second bipolar transistor IGBT1, and a collector of the sixth bipolar transistor IGBT6 are electrically connected to the C-phase cable, and the rectifier device 1 includes a first bipolar transistor IGBT1, the collector of the third bipolar transistor IGBT3 and the collector of the fifth bipolar transistor IGBT5 are commonly connected to the positive input terminal of the chopping device 2, and the emitter of the second bipolar transistor IGBT2, the emitter of the fourth bipolar transistor IGBT4 and the emitter of the sixth bipolar transistor IGBT6 are commonly connected to the negative input terminal of the chopping device 2.
It should be noted that, in the three-phase circuit, the a-phase cable is further electrically connected to a U1-phase connection terminal of a power connection terminal of the vibrating screen motor M, the B-phase cable is further electrically connected to a V1-phase connection terminal of the power connection terminal of the vibrating screen motor M, the C-phase cable is further electrically connected to a W1-phase connection terminal of the power connection terminal of the vibrating screen motor M, so that when the vibrating screen motor is braked by switching forward and reverse rotation, three-phase ac power converted by kinetic energy flows into the rectifier device 1 through the a-phase cable, the B-phase cable and the C-phase cable of the main circuit, the three-phase rectifier circuit in the rectifier device 1 composed of the first bipolar transistor IGBT1, the second bipolar transistor IGBT2, the third bipolar transistor IGBT3, the fourth bipolar transistor IGBT4, the fifth bipolar transistor IGBT5 and the sixth bipolar transistor IGBT6 absorbs the three-phase ac power generated by the vibrating screen motor M and rectifies it into dc, the positive electrode and the negative electrode of the direct current are respectively connected with the positive electrode input end of the chopper piece 2 and the negative electrode input end of the chopper piece 2, so that absorption and conversion of three-phase alternating current energy are realized, impact of the three-phase alternating current energy on a power grid is avoided, the voltage of the power grid serving as a bus power supply is stable, and stable operation of the vibrating screen motor and the power grid is realized.
In an embodiment of the present invention, as shown in fig. 4, the chopping device 2 includes a seventh bipolar transistor IGBT7, an eighth bipolar transistor IGBT8, and a fourth inductor L4, wherein a collector of the seventh bipolar transistor IGBT7 is electrically connected to a collector of the fifth bipolar transistor IGBT5, an emitter of the eighth bipolar transistor IGBT8 and the power storage device 3 are commonly connected to an emitter of the sixth bipolar transistor IGBT6, an emitter of the seventh bipolar transistor IGBT7 and a collector of the eighth bipolar transistor IGBT8 are both electrically connected to one end of the fourth inductor L4, and the other end of the fourth inductor L4 is electrically connected to an anode of the power storage device 3.
The collector of the seventh bipolar transistor IGBT7 and the emitter of the eighth bipolar transistor IGBT8 are respectively used as the positive input terminal of the chopper device 2 and the negative input terminal of the chopper device 2; the rectifier device 1 converts three-phase alternating current energy into direct current, and then the direct current is converted into voltage-adjustable direct current through the seventh bipolar transistor IGBT7 and the eighth bipolar transistor IGBT8, wherein the fourth inductor L4 can filter the voltage-adjustable direct current to form smoother direct current which is convenient to stably store into the electric energy storage device 3, and then the three-phase alternating current energy generated by the vibrating screen motor is stored in the electric energy storage device 3 after being processed, so that the electric energy waste is avoided.
In one embodiment of the invention, as shown in connection with fig. 4, the electrical energy storage assembly comprises a filter device 4, said filter device 4 being arranged between said rectifying device 1 and said three-phase circuit.
It should be noted that, set up filter device 4 between three-phase circuit and rectifier device 1 to the realization is filtered the three-phase alternating current electric energy that shale shaker motor M produced through filter device 4 earlier, is giving rectifier device 1 and is rectifying in the transmission, thereby realizes the harmonic filtering to nonspecific frequency in the three-phase alternating current electric energy, with interference such as elimination ripple, prevents that external interference among the three-phase alternating current electric energy from causing the interference to rectifier device 1, also prevents that rectifier device 1's signal from disturbing externally.
In an embodiment of the present invention, as shown in fig. 4, the filter device 4 includes a first inductor L1, a second inductor L2, and a third inductor L3, first ends of the first inductor L1, the second inductor L2, and the third inductor L3 are electrically connected to the a-phase cable, the B-phase cable, and the C-phase cable, respectively, second ends of the first inductor L1, the second inductor L2, and the third inductor L3 are shorted, and third ends of the first inductor L1, the second inductor L2, and the third inductor L3 are electrically connected to an emitter of the first bipolar transistor IGBT1, an emitter of the third bipolar transistor IGBT3, and an emitter of the fifth bipolar transistor IGBT5, respectively.
It should be noted that each of the first inductor L1, the second inductor L2, and the third inductor L3 has three terminals, which are a first terminal, a second terminal, and a third terminal, respectively, where the third terminal is a pin led out between the first terminal and the second terminal in the inductor; first ends of the first inductor L1, the second inductor L2 and the third inductor L3 are electrically connected with an A-phase cable, a B-phase cable and a C-phase cable in the three-phase circuit respectively; the third ends of the first inductor L1, the second inductor L2 and the third inductor L3 are respectively electrically connected with the emitter of the first bipolar transistor IGBT1, the emitter of the third bipolar transistor IGBT3 and the emitter of the fifth bipolar transistor IGBT5, so that abnormal extraneous signals of the three-phase alternating current distributed on the a-phase cable, the B-phase cable and the C-phase cable are filtered out through the first inductor L1, the second inductor L2 and the third inductor L3 in the filter device 4, and the clean and clutter-free three-phase alternating current can be transmitted to the rectifier device 1 to be rectified.
In one embodiment of the present invention, the vibrating screen energy treatment apparatus further comprises a dc load (not shown in the figures) interposed between the rectifying device 1 and the chopping device 2.
It should be noted that, by connecting the dc load between the rectifier device 1 and the chopper device 2, when the electric energy stored in the electric energy storage device is sufficient and the electric energy is discharged, the dc load can be discharged and output to the dc load through the chopper device 2 to supply power, so that the electric energy in the electric energy storage device is fully utilized, and the waste of the dc energy when the electric energy storage device is discharged is avoided; because the direct current load is connected between the rectifying device 1 and the chopper device 2, the rectifying device 1 rectifies the three-phase alternating current into direct current which contains certain noise waves, so that the direct current power supply device is suitable for supplying power to different direct current loads.
In an embodiment of the present invention, as shown in fig. 4, the control assembly includes a voltage detection device 5 and a main control device 6, the voltage detection device 5 is electrically connected to the three-phase circuit, and the main control device 6 is electrically connected to the voltage detection device 5 and the electrical energy storage assembly, respectively.
It should be noted that, in the three-phase circuit, the a-phase cable, the B-phase cable and the C-phase cable are all connected to the voltage detection device 5, so that the voltage detection device 5 detects the bus voltage ac 380V-450V of the main circuit where the vibrating screen motor M is located in real time, and is also electrically connected to the main control device 6 through the voltage detection device 5, so that the voltage detection device 5 converts the detected bus voltage ac 380V-450V into a usable output signal and transmits the usable output signal to the main control device 6, and the main control device 6 monitors the bus voltage of the main circuit; the voltage detection device 5 can adopt a voltage sensor for collecting the bus voltage of the three-phase circuit, and the voltage detection device 5 which can collect the bus voltage of the three-phase circuit is suitable for the technical scheme and is not limited specifically. The main control device 6 is electrically connected with the electric energy storage assembly, the electric energy storage assembly comprises a rectifying device 1, a chopper device 2 and an electric energy storage device 3 which are sequentially and electrically connected, and the main control device 6 is electrically connected with the rectifying device 1 and the chopper device 2 to respectively control the rectifying device 1 and the chopper device 2.
In this embodiment, a charging value and a charging end value may be set in the main control device 6, and when the voltage detection device 5 compares the current bus voltage value of the main circuit in which the vibrating screen motor M is detected with the charging set value and the charging end set value, it is determined whether the vibrating screen energy processing device starts the charging mode or exits the charging mode to start the discharging mode.
In this embodiment, eight signal control terminals are further provided on the main control device 6, which are a PWM1 terminal, a PWM2 terminal, a PWM3 terminal, a PWM4 terminal, a PWM5 terminal, a PWM6 terminal, a PWM7 terminal and a PWM8 terminal, and are electrically connected to the bases of the first bipolar transistor IGBT1, the second bipolar transistor IGBT2, the third bipolar transistor IGBT3, the fourth bipolar transistor IGBT4, the fifth bipolar transistor IGBT5, the sixth bipolar transistor IGBT6, the seventh bipolar transistor IGBT7 and the eighth bipolar transistor IGBT8 in the electrical energy storage component, so that the main control device 6 outputs corresponding PWM signals through the eight signal control terminals to control the duty ratios of the eight bipolar transistors respectively, thereby realizing automatic control of on-state time and off-state time of the bipolar transistors in the rectifying device 1 and the chopper device 2; if the bus voltage is higher than the charging set value or a forward and reverse rotation switching instruction is received, the main control device 6 outputs high level through eight signal control ends to improve the duty ratio of the corresponding bipolar transistor, so that the on time of the corresponding bipolar transistor is controlled, the bipolar transistor is conducted for a long time, and an electric energy storage assembly in the vibrating screen energy processing equipment is connected to a three-phase circuit to absorb three-phase alternating current electric energy generated by a vibrating screen motor M during braking; when the voltage of the bus is detected to be lower than or equal to the charging end set value and larger than zero, the vibrating screen motor M is judged to complete forward and reverse rotation switching, a normal working mode is entered, at the moment, the main control device 6 controls the duty ratio of each bipolar transistor to control the electric energy storage assembly to release a circuit to a main loop, after discharging is finished, the main control device 6 outputs low level through eight signal control ends to reduce the duty ratio of the corresponding bipolar transistor, so that the off time of the corresponding bipolar transistor is controlled, the corresponding bipolar transistor is disconnected for a long time, the electric energy storage assembly exits from a three-phase circuit, and continuous cycle operation is performed according to the process.
In one embodiment of the invention, the electrical energy storage device 3 is a super capacitor C1.
It should be noted that, the super capacitor C1 is selected as the electric energy storage device 3, and compared with the storage battery in the prior art, the power density of the super capacitor is higher, which is about 100 KW/kg. Because the switching of the positive and negative rotation of the vibrating screen motor M needs to be completed in a short time, the power density of the electric energy storage device 3 needs to be large enough to completely absorb the electric energy fed back by braking, but the power density of a storage battery on the market is low, so that the requirement of completely absorbing the electric energy fed back by braking of the vibrating screen motor M cannot be met; compared with the common capacitor, the super capacitor has higher energy density which can reach 30 W.h/kg. And the position of the vibrating screen is installed on a main building metering floor, the space of the vibrating screen is narrow, so that the size of the electric energy storage device 3 is required to be as small as possible on the premise of meeting the requirement of absorbing power, but the size of a common capacitor for storing the same electric energy, such as a storage battery, is several times that of a super capacitor, and the super capacitor is more suitable for the working condition of absorbing or releasing the electric energy generated by the motor M of the vibrating screen during braking.
Another embodiment of the present invention provides a method for processing energy of a vibrating screen, which is shown in fig. 5 and applied to the energy processing equipment of a vibrating screen, and the method for processing energy of a vibrating screen includes:
s1, determining the running state of the vibrating screen motor M;
s2, when the running state of the vibrating screen motor M is a braking state, absorbing electric energy generated by braking of the vibrating screen motor M from a main loop;
and when the running state of the vibrating screen motor M is a normal working state, releasing the electric energy to the main loop.
Because a vibrating screen energy processing method is based on the vibrating screen energy processing equipment for processing, the vibrating screen energy processing method at least has the whole technical effect of the vibrating screen energy processing equipment.
In the above embodiment, three charge-discharge modes can be set on the upper computer interface, which are respectively a mode according to the voltage comparison result, a positive-negative rotation switching signal mode and a manual mode.
In one embodiment of the invention, the method of shaker energy treatment further comprises:
acquiring the bus voltage of the main loop;
the determining the operation state of the vibrating screen motor M includes:
when the bus voltage is higher than a preset charging set value, determining that the running state of a vibrating screen motor M is a braking state;
and when the bus voltage is lower than a preset charging end set value and is greater than 0, determining that the running state of the vibrating screen motor M is a normal working state.
It should be noted that, in this embodiment, according to the voltage comparison result mode, the electric energy storage component in the vibrating screen energy processing device is connected to the three-phase circuit, and the bus voltage is detected in real time by the voltage detection device 5. When the vibrating screen motor M is in a normal working state, the electric energy storage assembly does not work, the judgment logic is the comparison of the bus voltage and a preset charging end set value, a voltage comparison result mode can be selected on an upper computer interface to start the vibrating screen energy processing equipment, and the main control device 6 collects the bus voltage and compares the bus voltage with the preset charging set value and the preset charging end set value to judge.
With reference to fig. 4, 5, and 6, acquiring the bus voltage of the main circuit means that the bus voltage of the three-phase circuit can be acquired by the voltage detection device 5, the bus voltage is also the working voltage of the vibrating screen motor M, and the acquired bus voltage is transmitted to the main control device 6 by the voltage detection device 5; comparing the bus voltage with a preset charging set value and a preset charging end set value by the main control device 6, and determining the running state of the vibrating screen motor according to the comparison result; the normal fluctuation range of the bus voltage of the three-phase circuit where the vibrating screen motor M is located is AC370V-AC390V (assumed), a charging set value, namely a starting threshold value, is manually set to be AC395V on the main control device 6 or an upper computer interface, and a charging end set value, namely a discharging threshold value, is set to be AC 380V.
When the bus voltage reaches AC395V, the bus voltage is higher than the charging set value at the moment, the running state of the vibrating screen motor M is determined to be a braking state, the vibrating screen energy processing equipment is put into operation, the control assembly in the vibrating screen energy processing equipment controls the electric energy storage assembly to start a charging mode, at the moment, three-phase alternating current generated by the vibrating screen motor M due to positive and negative rotation braking is rectified into direct current through the rectifying device 1, and then the direct current is converted into the direct current with adjustable voltage through the chopping device 2 and charges the super capacitor C1.
When the bus voltage is lower than AC380V, the bus voltage is lower than a set charging end value at the moment, the positive and negative rotation switching of the vibrating screen motor M is proved to be completed and enters a normal working state, so that the running state of the vibrating screen motor M is determined to be the normal working state, at the moment, the control assembly in the vibrating screen energy processing equipment controls the electric energy storage assembly to exit from the charging mode, and in order to ensure that the next super capacitor switching can have enough capacity, the discharging mode needs to be started as soon as possible. Therefore, the discharge logic is: as long as the vibrating screen energy processing equipment is not in the charging mode, starting the discharging mode until the super capacitor is emptied, and preferentially supplying power to a vibrating screen motor M by using the super capacitor C1; the mode is an automatic mode, and only a charging set value, namely a charging threshold value, or a charging end set value, namely a discharging threshold value, needs to be set manually.
In one embodiment of the invention, the method of shaker energy treatment further comprises:
acquiring the bus voltage of the main loop;
the determining the operation state of the vibrating screen motor M includes:
when a forward and reverse rotation switching instruction is received, determining that the running state of the vibrating screen motor M is a braking state, and absorbing electric energy generated by braking of the vibrating screen motor M from a main loop;
and when the bus voltage is lower than a preset charging end set value and is greater than 0, determining that the running state of the vibrating screen motor M is a normal working state.
It should be noted that, in this embodiment, a signal mode is switched according to positive and negative rotation, where a positive and negative rotation switching instruction of the vibrating screen motor M is issued from a controller of a metering cabinet in the vibrating screen, the controller of the metering cabinet and the master control device 6 in the vibrating screen energy processing device may communicate through a CAN, when the master control device 6 in the vibrating screen energy processing device receives the positive and negative rotation switching instruction of the vibrating screen, the vibrating screen motor M performs a positive and negative rotation switching action and generates three-phase ac electric energy, and at this time, it is determined that an operating state of the vibrating screen motor M is a braking state, an electric energy storage component in the vibrating screen energy processing device is put into use, and the three-phase ac electric energy generated by braking of the vibrating screen motor M is absorbed from a. When the bus voltage of the main circuit where the vibrating screen motor M is located is detected to be AC380V (settable), the bus voltage is lower than a preset charging end set value at the moment, it is proved that the forward and reverse rotation switching of the vibrating screen is completed, the vibrating screen motor enters a normal working mode, and at the moment, the super capacitor discharges electricity for the vibrating screen motor to use. The mode is an automatic mode, only a discharge threshold value needs to be set manually, and charging is judged according to a positive and negative rotation switching signal.
If the charging and discharging mode set on the upper computer is a manual mode, the vibrating screen energy processing equipment is not automatically put into use, but is put into use manually by an operator. The upper computer interface comprises two command buttons of charging and discharging, and the mode is a manual mode and is judged manually.
In the above embodiment, the charging of the super capacitor in the charging mode may be selected between a constant current mode, a constant voltage mode and a constant power mode according to actual working conditions.
In one embodiment of the invention, the shaker energy treatment apparatus comprises a supercapacitor;
when the running state of the vibrating screen motor M is a braking state, the electric energy generated by braking of the vibrating screen motor M is absorbed from a main loop, and the method comprises the following steps:
when the vibrating screen motor M is in a braking state and the electric storage capacity of the super capacitor is 0, controlling the super capacitor to absorb electric energy generated by braking of the vibrating screen motor M from a main loop in a constant current mode;
and when the vibrating screen motor M is in a braking state and the voltage of the super capacitor is greater than a preset upper limit voltage value, controlling the super capacitor to be in a constant voltage mode.
It should be noted that when the vibrating screen motor M is in a braking state and the constant current mode is selected for charging, the super capacitor is charged with a fixed current, for example, the voltage range of the super capacitor is 200V to 400V, and when the electric storage capacity of the super capacitor is 0, it is determined that the super capacitor C1 is in a power shortage condition, at this time, the constant current mode must be adopted, the super capacitor is charged with the fixed current, and a large current is easily formed, and the super capacitor is damaged.
When the vibrating screen motor M is in a braking state, the preset upper limit voltage value is 400V, when the voltage of the super capacitor is greater than 400V, the voltage of the super capacitor at the moment is determined to reach the charging upper limit, and the control assembly controls the super capacitor in the electric energy storage assembly to absorb electric energy generated by braking of the vibrating screen motor M from a main loop at the voltage of 400V in a constant voltage mode, so that the super capacitor is ensured to be in a floating charging state; because when the voltage of the super capacitor reaches the preset upper limit voltage value of 400V, if the charging is continued in the constant current mode, the super capacitor can be damaged.
The constant power mode is an unnecessary mode, and the constant current mode and the constant voltage mode can be satisfied under normal working conditions, and because the input power is insufficient under some special working conditions, for example, if the constant power mode is charged to 400V, the input power is exceeded, and therefore the charging pressure is caused on the super capacitor. For example, when the input rated power is preset to be 30KW, if the actual input power is only 25KW, the super capacitor is controlled to absorb the electric energy generated by braking the motor of the vibrating screen from the main loop in the constant power mode.
Another embodiment of the invention provides a vibrating screen, which comprises a bus power supply, a vibrating screen motor M, a three-phase circuit and the vibrating screen energy processing equipment, wherein the bus power supply and the vibrating screen motor M are electrically connected through the three-phase circuit to form a main loop, and the vibrating screen energy processing equipment is connected to the three-phase circuit.
It should be noted that, the vibrating screen energy processing device is connected to the main circuit between the bus power supply and the vibrating screen motor M, and the bus voltage is detected by the main control device 6 through the voltage detection device 5.
In an embodiment of the invention, the vibrating screen further comprises a forward and reverse rotation assembly, two ends of the forward and reverse rotation assembly are respectively and electrically connected with the bus power supply and the vibrating screen motor M, and the vibrating screen energy processing equipment is connected between the bus power supply and the forward and reverse rotation assembly or between the forward and reverse rotation assembly and the vibrating screen motor M.
It should be noted that, with reference to fig. 3, the forward/reverse rotation assembly is disposed between the bus power supply and the vibrating screen motor M, so that the forward/reverse rotation assembly controls the vibrating screen motor M to perform forward/reverse rotation switching; the forward and reverse rotation assembly comprises a forward rotation contactor FKM1 and a reverse rotation contactor FKM2, wherein the wire inlet ends L11, L12 and L13 of the forward rotation contactor FKM1 are respectively and electrically connected with the phase A, the phase B and the phase C of a bus power supply in a main circuit, the wire inlet ends L21, L22 and L23 of the reverse rotation contactor FKM2 are respectively and electrically connected with the wire inlet ends L11, L12 and L13 of the forward rotation contactor FKM1, the wire outlet ends T11, T12 and T13 of the forward rotation contactor FKM1 are respectively and electrically connected with the U1 terminal, V1 terminal and W1 terminal of a vibrating screen motor in the main circuit, and the wire outlet ends T21, T22 and T23 of the reverse rotation contactor FKM2 are respectively and electrically connected with the wire outlet ends T13, T12 and T11 of the reverse rotation contactor FKM1, so that the forward rotation contactor FKM1 and the reverse rotation contactor FKM2 realize forward and reverse rotation operation of. When the vibrating screen energy processing equipment is connected between the bus power supply and the forward and reverse rotation assembly, the three-phase alternating current energy generated by braking during forward and reverse rotation switching of the vibrating screen motor M can be processed and absorbed by the electric energy storage assembly in the vibrating screen energy processing equipment after passing through the forward and reverse rotation assembly; when the vibrating screen energy processing equipment is connected between the forward and reverse rotation assembly and the vibrating screen motor M, the three-phase alternating current energy generated by braking during forward and reverse rotation switching of the vibrating screen motor M can be quickly processed and absorbed by the electric energy storage assembly.
The forward and reverse rotation assembly can also be in other structures, such as a frequency converter or a motor soft starter, and the forward and reverse rotation assembly which can control the vibrating screen motor M to switch forward and reverse rotation is suitable for the technical scheme, which is not illustrated herein.
In this embodiment, as shown in fig. 1, the vibrating screen apparatus further includes a bus bar switch FQF1, where the bus bar switch FQF1 is disposed between the bus bar power supply and the forward and reverse rotation assembly, and is used to control on/off of the main circuit.
It should be noted that the vibrating screen device further includes current transformers 7, the current transformers 7 are disposed on the three-phase circuit, the number of the current transformers 7 may be one, two or three, and as shown in fig. 4, when the number of the current transformers 7 is one, the vibrating screen device may be mounted on any one phase of an a-phase cable, a B-phase cable and a C-phase cable of the three-phase circuit, so as to implement real-time monitoring on the working current of a certain phase; when the number of the current transformers 7 is two, the current transformers can be arranged on any two phases of an A-phase cable, a B-phase cable and a C-phase cable of a main loop, so that the working current of a certain two phases can be monitored in real time; when the number of the current transformers 7 is three, the current transformers can be installed on three phases of an A-phase cable, a B-phase cable and a C-phase cable of a main loop, so that the three-phase working current of the main loop can be monitored in real time.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (14)
1. The utility model provides a shale shaker energy processing equipment, is applied to the shale shaker, the shale shaker includes bus power supply and shale shaker motor (M), bus power supply with shale shaker motor (M) are connected and are formed the major loop through three phase circuit electricity, a serial communication port, shale shaker energy processing equipment inserts the three phase circuit, shale shaker energy processing equipment is suitable for be in shale shaker motor (M) is followed when braking state the major loop absorbs the electric energy that shale shaker motor (M) braking produced is right when being in normal operating condition the major loop release electric energy.
2. The shaker energy processing apparatus as claimed in claim 1, characterized in that the shaker energy processing apparatus comprises an electrical energy storage assembly and a control assembly, the control assembly being electrically connected to the electrical energy storage assembly, the control assembly being adapted to control the electrical energy storage assembly to absorb electrical energy from the primary circuit generated by braking of the shaker motor (M) when the shaker motor (M) is in a braking state, and to control the electrical energy storage assembly to release electrical energy to the primary circuit when the shaker motor (M) is in a normal operating state.
3. The vibrating screen energy handling apparatus of claim 2, wherein the electrical energy storage assembly comprises a rectifying device (1), a chopper device (2) and an electrical energy storage device (3) electrically connected in series, the rectifying device (1) being connected into the three-phase circuit.
4. The vibrating screen energy treatment apparatus of claim 3, wherein the three-phase circuit comprises an A-phase cable, a B-phase cable, and a C-phase cable, the rectifier device (1) comprises a first bipolar transistor (IGBT1), a second bipolar transistor (IGBT2), a third bipolar transistor (IGBT3), a fourth bipolar transistor (IGBT4), a fifth bipolar transistor (IGBT5), and a sixth bipolar transistor (IGBT6), an emitter of the first bipolar transistor (IGBT1) and a collector of the second bipolar transistor (IGBT2) are each electrically connected with the A-phase cable, an emitter of the third bipolar transistor (IGBT3) and a collector of the fourth bipolar transistor (IGBT4) are each electrically connected with the B-phase cable, an emitter of the fifth bipolar transistor (IGBT5) and a collector of the sixth bipolar transistor (IGBT6) are each electrically connected with the C-phase cable, the collector of the first bipolar transistor (IGBT1), the collector of the third bipolar transistor (IGBT3) and the collector of the fifth bipolar transistor (IGBT5) are commonly connected to the positive input terminal of the chopping device (2), and the emitter of the second bipolar transistor (IGBT2), the emitter of the fourth bipolar transistor (IGBT4) and the emitter of the sixth bipolar transistor (IGBT6) are commonly connected to the negative input terminal of the chopping device (2).
5. The vibrating screen energy processing apparatus of claim 4, wherein the chopping device (2) comprises a seventh bipolar transistor (IGBT7), an eighth bipolar transistor (IGBT8) and a fourth inductor (L4), wherein a collector of the seventh bipolar transistor (IGBT7) is electrically connected to a collector of the fifth bipolar transistor (IGBT5), wherein an emitter of the eighth bipolar transistor (IGBT8) and the electrical energy storage device (3) are commonly connected to an emitter of the sixth bipolar transistor (IGBT6), wherein an emitter of the seventh bipolar transistor (IGBT7) and a collector of the eighth bipolar transistor (IGBT8) are both electrically connected to one end of the fourth inductor (L4), and wherein the other end of the fourth inductor (L4) is electrically connected to a positive pole of the electrical energy storage device (3).
6. The vibrating screen energy handling apparatus of claim 4, wherein the electrical energy storage assembly further comprises a filter device (4), the filter device (4) being disposed between the rectifier device (1) and the three-phase circuit.
7. The vibrating screen energy treatment apparatus of claim 6, wherein the filter device (4) comprises a first inductance (L1), a second inductance (L2) and a third inductance (L3), first ends of the first inductance (L1), the second inductance (L2) and the third inductance (L3) are electrically connected with the A-phase cable, the B-phase cable and the C-phase cable, respectively, second ends of the first inductance (L1), the second inductance (L2) and the third inductance (L3) are shorted, and third ends of the first inductance (L1), the second inductance (L2) and the third inductance (L3) are electrically connected with an emitter of the first bipolar transistor (IGBT1), an emitter of the third bipolar transistor (IGBT3) and an emitter of the fifth bipolar transistor (IGBT5), respectively.
8. The vibrating screen energy treatment apparatus of any one of claims 3 to 7, further comprising a DC load interposed between the rectifying device (1) and the chopping device (2).
9. The shaker energy processing apparatus of claim 2, wherein the control assembly comprises a voltage detection device (5) and a master control device (6), the voltage detection device (5) being electrically connected to the three-phase circuit, the master control device (6) being electrically connected to the voltage detection device (5) and the electrical energy storage assembly, respectively.
10. A method of vibrating screen energy handling, for use with a vibrating screen energy handling apparatus as claimed in any one of claims 1 to 9, the method comprising:
determining an operating state of a shaker motor (M);
when the running state of the vibrating screen motor (M) is a braking state, absorbing electric energy generated by braking of the vibrating screen motor (M) from a main loop;
and when the running state of the vibrating screen motor (M) is a normal working state, releasing the electric energy to the main loop.
11. The shaker energy treatment method of claim 10, further comprising:
acquiring the bus voltage of the main loop;
the determining an operational state of a shaker motor (M) comprises:
when the bus voltage is higher than a preset charging set value, determining that the running state of a vibrating screen motor (M) is a braking state;
and when the bus voltage is lower than a preset charging end set value and is greater than 0, determining that the running state of the vibrating screen motor (M) is a normal working state.
12. The shaker energy treatment method of claim 10, further comprising:
acquiring the bus voltage of the main loop;
the determining an operational state of a shaker motor (M) comprises:
when a forward and reverse rotation switching instruction is received, determining that the running state of the vibrating screen motor (M) is a braking state, and absorbing electric energy generated by braking of the vibrating screen motor (M) from a main loop;
and when the bus voltage is lower than a preset charging end set value and is greater than 0, determining that the running state of the vibrating screen motor (M) is a normal working state.
13. The shaker energy processing method of claim 10, wherein the shaker energy processing apparatus comprises a supercapacitor;
when the running state of the vibrating screen motor (M) is a braking state, the electric energy generated by braking of the vibrating screen motor (M) is absorbed from a main loop, and the method comprises the following steps:
when the vibrating screen motor (M) is in a braking state and the electric storage capacity of the super capacitor is 0, controlling the super capacitor to absorb electric energy generated by braking of the vibrating screen motor (M) from a main loop in a constant current mode;
when the vibrating screen motor (M) is in a braking state and the voltage of the super capacitor is larger than a preset upper limit voltage value, the super capacitor is controlled to absorb electric energy generated by braking of the vibrating screen motor (M) from a main loop in a constant voltage mode.
14. A vibrating screen, characterized in that it comprises a bus power supply, a vibrating screen motor (M), a three-phase circuit and a vibrating screen energy handling device according to any one of claims 1 to 9, said bus power supply being electrically connected to said vibrating screen motor (M) through said three-phase circuit and forming a main circuit, said vibrating screen energy handling device being switched in said three-phase circuit.
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