A roll-over machine energy feedback system and method of use

Abstract

The present application provides a car dumper energy feedback system and a use method thereof, and relates to the technical field of car dumper, wherein the system comprises a frequency converter module, an energy feedback device and a multifunctional electric energy meter module; the frequency converter module is electrically connected with the multifunctional electric energy meter module and the energy feedback device, and is used for frequency conversion and speed regulation; the multifunctional electric energy meter module is electrically connected with the frequency converter module and the energy feedback device, and is used for recording energy changes of the car dumper; and the energy feedback device is electrically connected with the multifunctional electric energy meter module and the frequency converter module, and is used for recovering braking energy. The present application provides a car dumper energy feedback system and a use method thereof, which are used for recording energy changes of the car dumper during operation, optimizing operation process and solving the problem of inaccurate energy planning during the operation of the car dumper.

Description

Technical Field

[0001] This invention relates to the field of tippler technology, and in particular to a tippler energy feedback system and its usage method. Background Technology

[0002] In the tippler control system, the four main drives—the readjustment machine, the tippler itself, the transfer platform, and the air conditioning unit—all employ variable frequency speed control systems. Although variable frequency speed control is significantly more energy-efficient than other speed control methods, given that the main drive motors of the tippler continuously start, brake, adjust speed, and reverse within a short stroke, and are high-inertia loads, the motors inevitably generate electricity when rapid braking is required. Due to the unidirectional current flow characteristic of the rectifier semiconductor components in commonly used frequency converters, the energy generated by the motor in the generator state can only be dissipated as heat in the braking resistor through the DC energy-dissipating braking unit. Therefore, the excess energy generated in the tippler's electrical control system cannot be fed back to the power grid and must be consumed through energy-dissipating braking.

[0003] To address the aforementioned drawbacks, existing technologies often employ energy feedback devices to reuse excess energy. For example, Chinese patent CN216252181U, "A Regenerative Braking Energy Feedback Device and Power Supply System," discloses such a device. During rail vehicle braking, the first DC voltage of the rail vehicle's DC bus is converted into a second DC voltage required by the DC grid through M first energy feeder converters, and then converted into a second AC voltage required by the AC grid through N second energy feeder converters and N grid transformers, thus feeding the regenerative braking energy back to AC and DC grids of different voltage levels. However, during tipper control operations, it is inconvenient to charge the tipper during operation. Therefore, energy usage needs to be carefully planned, requiring real-time monitoring and planning of energy changes. Otherwise, insufficient energy may necessitate additional energy replenishment, which is time-consuming and labor-intensive. The aforementioned existing technologies cannot achieve this. Summary of the Invention

[0004] In view of this, the present invention proposes an energy feedback system and method for tipper, which is used to record energy changes during tipper operation, optimize the operation process, and solve the problem of inaccurate energy planning during current tipper operation.

[0005] The technical solution of the present invention is implemented as follows: On the one hand, the present invention provides an energy feedback system for a tipper, characterized in that the system includes a frequency converter module, an energy feedback device, and a multi-functional energy meter module;

[0006] The frequency converter module is electrically connected to the multi-functional energy meter module and the energy feedback device for frequency conversion speed regulation;

[0007] The multi-functional energy meter module is electrically connected to the frequency converter module and the energy feedback device, and is used to record the energy changes of the tippler.

[0008] The energy feedback device is electrically connected to the multi-functional energy meter module and the frequency converter module to recover braking energy.

[0009] Preferably, the multi-function meter module includes a multi-function meter G, a circuit breaker S1, a contactor S2, a circuit breaker S3, a fuse N, an input filter U1, and an input reactor U2;

[0010] Circuit breaker S1 controls the on / off of three circuits: R, S, and T. Multifunctional instrument G is electrically connected to circuit breaker S3. One end of fuse N is electrically connected to contactor S2, and the other end of fuse N is electrically connected to one end of input filter U1. The other end of input filter U1 is electrically connected to one end of input reactor U2, and the other end of input reactor U2 is electrically connected to frequency converter module.

[0011] Preferably, the frequency converter module includes a rectifier U3, a current-limiting resistor R1, a DC bus J1, an inverter U4, an output reactor U5, and a thermal relay U6;

[0012] One end of rectifier U3 is electrically connected to the other end of input reactor U2. The other end of rectifier U3 is electrically connected to one end of resistor R1 and one end of DC bus J1. The other end of resistor R1 is electrically connected to one end of DC bus J1. The other end of DC bus J1 is electrically connected to one end of inverter U4 and energy feedback device. The other end of inverter U4 is electrically connected to one end of output reactor U5. The other end of output reactor U5 is electrically connected to one end of thermal relay U6.

[0013] Preferably, the energy feedback device includes an input reactor L1, an input filter L2, a surge arrester J2, a current-limiting resistor R2, transistors VT1, VT2, VT3, VT4, VT5, VT6, a three-phase capacitor C1, and a capacitor C2.

[0014] One end of the input reactor L1 is electrically connected to the surge arrester J2. The other end of the input reactor L1 is electrically connected to the three-phase capacitor C1 and one end of the input filter L2. The other end of the input filter L2 is electrically connected to transistors VT1 and VT6. Transistors VT1 and VT6 are connected in series, transistors VT2 and VT5 are connected in series, transistors VT3 and VT4 are connected in series and in parallel with capacitor C2. One end of resistor R2 is electrically connected to capacitor C2, and the other end of resistor R2 is electrically connected to the DC bus J1.

[0015] Preferably, the current detection circuit of the energy feedback device includes a Hall sensor U7, an operational amplifier U8, capacitors C3, C4, C5, and resistors R3, R4, R5, and R6;

[0016] Pin 6 of Hall sensor U7 is electrically connected to one end of capacitor C3. The other end of capacitor C3 is electrically connected to pin 5 of Hall sensor U7 and GND. Pin 8 of Hall sensor U7 is electrically connected to +5V. Pin 7 of Hall sensor U7 is electrically connected to one end of resistor R4. The other end of resistor R4 is electrically connected to one end of resistor R3, one end of capacitor C4, and the non-inverting input of operational amplifier U8. The other end of resistor R3 is electrically connected to the other end of capacitor C4 and the output of operational amplifier U8. The inverting input of operational amplifier U8 is electrically connected to one end of resistor R5, one end of capacitor C5, and one end of resistor R6. The other end of resistor R5 is electrically connected to +5V. The other end of capacitor C5 is electrically connected to the other end of resistor R6 and GND. The positive and negative power supplies of operational amplifier U8 are connected to +5V.

[0017] Preferably, the voltage detection circuit of the energy feedback device includes operational amplifiers U9, U10, U11, and U12, resistors R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, and R17, capacitors C7, C8, C9, C10, and C11, and an optocoupler U13;

[0018] The inverting input of operational amplifier U9 is electrically connected to one end of resistor R7 and one end of resistor R12. The other end of resistor R7 is grounded. The other end of resistor R12 is electrically connected to the output of operational amplifier U9 and one end of resistor R13. The non-inverting input of operational amplifier U9 is electrically connected to one end of resistor R9 and one end of resistor R11. The other end of resistor R9 is electrically connected to one end of resistor R8 and capacitor C7. The other end of resistor R11 is electrically connected to one end of resistor R10 and capacitor C6. The other end of capacitor C7 is grounded. The other end of capacitor C6 is electrically connected to GND. The positive power supply of operational amplifier U9 is connected to +5V, and the negative power supply is grounded. The inverting input of operational amplifier U10 is electrically connected to the other end of resistor R13. The non-inverting input of operational amplifier U10 is electrically connected to the negative power supply and GND. The positive power supply of operational amplifier U10 is connected to +5V. The output of operational amplifier U10 is electrically connected to one end of capacitor C8 and one end of resistor R14. The other end of capacitor C8 is electrically connected to one end of capacitor C9. The other end of capacitor C9 is connected to optocoupler U. Pin 3 of optocoupler U13 is electrically connected; the other end of resistor R13 is electrically connected to pin 1 of optocoupler U13; pin 2 of optocoupler U13 is electrically connected to +5V; pins 4 and 5 of optocoupler U13 are grounded; pin 6 of optocoupler U13 is electrically connected to one end of resistor R15, one end of capacitor C10, and the inverting input of operational amplifier U11; the non-inverting input of operational amplifier U11 is electrically connected to the negative power supply and GND; the positive power supply of operational amplifier U11 is electrically connected to +5V; the output of operational amplifier U11... The output terminal is electrically connected to the other end of resistor R15, the other end of capacitor C10, and one end of resistor R16. The other end of resistor R16 is electrically connected to one end of capacitor C11 and the non-inverting input terminal of operational amplifier U12. The other end of capacitor C11 is electrically connected to the negative power supply and GND of operational amplifier U12. The positive power supply of operational amplifier U12 is electrically connected to +5V. The inverting input terminal of operational amplifier U12 is electrically connected to one end of resistor R17. The other end of resistor R17 is electrically connected to the output terminal of operational amplifier U12.

[0019] Preferably, the zero-crossing detection circuit of the energy feedback device includes operational amplifiers U14 and U15, resistors R18, R19 and R20, capacitors C12, C13, C14, C15 and C16, microcontroller U16, and diodes J3 and J4.

[0020] Operational amplifier U14's inverting input and output terminals are electrically connected to one end of resistor R18. Operational amplifier U14's positive power supply is connected to +15V and one end of capacitor C12, while its negative power supply is connected to -15V and one end of capacitor C13. The other end of capacitor C12 and capacitor C13 are grounded. The other end of resistor R18 is electrically connected to operational amplifier U15's inverting input terminal. Operational amplifier U15's non-inverting input terminal is grounded. Operational amplifier U15's positive power supply is connected to +15V and one end of capacitor C14, while its negative power supply is connected to -15V and one end of capacitor C14. The 5V terminal is electrically connected to one end of capacitor C15, the other end of capacitor C14 is grounded, the other end of capacitor C15 is grounded, the output terminal of operational amplifier U15 is electrically connected to the negative terminal of diode J3, the positive terminal of diode J4, and one end of microcontroller U16, the positive terminal of diode J3 is electrically connected to one end of capacitor C16 and GND, the other end of capacitor C16 is electrically connected to one end of resistor R19, the other end of resistor R19 is electrically connected to VCC, the negative terminal of diode J4 is electrically connected to VCC, and the other end of microcontroller U16 is electrically connected to resistor R20.

[0021] On the other hand, the present invention also provides a method for using a tippler energy feedback system, which includes the following steps based on the above-mentioned tippler energy feedback system:

[0022] S1, put the energy feedback device into operation. After the equipment runs normally for one cycle, record the reverse active power W1 of the electricity meter and adjust the working factor of the tippler operation process.

[0023] S2, after the single factor adjustment is completed, the equipment runs normally for one cycle and records the reverse active power W2 of the energy meter.

[0024] S3, repeat step S2, continuously adjust the work process and record the reverse active power Wn of the energy meter;

[0025] S4. Select the operation process with the largest reverse active power value as the final optimized operation process of the tipper.

[0026] Preferably, step S2 specifically includes:

[0027] The single factor includes adjusting the acceleration / deceleration time of the equipment operation, the speed reduction data, the size of the high-speed operation range, the size of the medium-speed operation range, and the size of the low-speed operation range.

[0028] Preferably, step S3 specifically includes:

[0029] When the reverse active power value W2 is greater than W1, it is beneficial to record this adjustment.

[0030] The tippler energy feedback system and its usage method of the present invention have the following advantages over the prior art:

[0031] Beneficial effects:

[0032] (1) By setting up an energy meter module to record the grid energy recovered by the energy feedback device, a single factor is adjusted to optimize the tippler's workflow, thereby obtaining the most energy-saving solution, which is convenient for actual work;

[0033] (2) The current detection circuit and voltage detection circuit are used to detect the energy change of the energy feedback device in real time, which is independent of the energy feedback device and is not affected by its internal interference.

[0034] (3) The phase and frequency of the power grid are obtained by using zero-crossing detection. In the figure, the AC low voltage after phase A voltage is divided by resistors enters from the inverting input terminal of the amplifier. Only when this AC low voltage signal crosses zero from positive will the output terminal output a synchronous zero-crossing detection pulse. The output zero-crossing signal also needs to be level reversed to improve the signal's anti-interference performance. In order to enable the microcontroller DSP to receive it, voltage conversion is also required through a voltage conversion chip. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a structural diagram of a tippler energy feedback system according to the present invention;

[0037] Figure 2 This is a wiring diagram of a multi-functional energy meter module, a frequency converter module, and an energy feedback device for a tipper energy feedback system according to the present invention.

[0038] Figure 3 This is a wiring diagram of the current detection circuit of the energy feedback device in the tipper energy feedback system of the present invention;

[0039] Figure 4 This is a wiring diagram of the voltage detection circuit of the energy feedback device in the tipper energy feedback system of the present invention;

[0040] Figure 5 This is a wiring diagram of the zero-crossing detection circuit of the energy feedback device in the tipper energy feedback system of the present invention;

[0041] Figure 6 This is a flowchart illustrating the usage method of a tippler energy feedback system according to the present invention. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0043] Example 1

[0044] Provide a tippler energy feedback system, such as Figure 1 As shown, the system includes a frequency converter module, an energy feedback device, and a multi-functional energy meter module;

[0045] The frequency converter module is electrically connected to the multi-functional energy meter module and the energy feedback device for frequency conversion speed regulation;

[0046] The multi-functional energy meter module is electrically connected to the frequency converter module and the energy feedback device, and is used to record the energy changes of the tippler.

[0047] The energy feedback device is electrically connected to the multi-functional energy meter module and the frequency converter module to recover braking energy.

[0048] By setting up an electricity meter module to record the grid energy recovered by the energy feedback device, and adjusting a single factor to optimize the tippler's workflow, the most energy-efficient solution can be derived, facilitating practical work.

[0049] like Figure 2 The diagram shown is a wiring diagram of a multi-functional energy meter module, a frequency converter module, and an energy feedback device for a tipper energy feedback system according to the present invention.

[0050] The multi-functional meter module includes a multi-functional meter G, a circuit breaker S1, a contactor S2, a circuit breaker S3, a fuse N, an input filter U1, and an input reactor U2;

[0051] Circuit breaker S1 controls the on / off of three circuits: R, S, and T. Multifunctional instrument G is electrically connected to circuit breaker S3. One end of fuse N is electrically connected to contactor S2, and the other end of fuse N is electrically connected to one end of input filter U1. The other end of input filter U1 is electrically connected to one end of input reactor U2, and the other end of input reactor U2 is electrically connected to frequency converter module.

[0052] The multi-functional energy meter module records the reverse active power W1 of the energy meter, which is the energy recovered by the energy feedback device and fed back to the power grid.

[0053] The frequency converter module includes a rectifier U3, a current-limiting resistor R1, a DC bus J1, an inverter U4, an output reactor U5, and a thermal relay U6;

[0054] One end of rectifier U3 is electrically connected to the other end of input reactor U2. The other end of rectifier U3 is electrically connected to one end of resistor R1 and one end of DC bus J1. The other end of resistor R1 is electrically connected to one end of DC bus J1. The other end of DC bus J1 is electrically connected to one end of inverter U4 and energy feedback device. The other end of inverter U4 is electrically connected to one end of output reactor U5. The other end of output reactor U5 is electrically connected to one end of thermal relay U6.

[0055] The frequency converter module uses inverter U4, DC bus J1, output reactor U5 and thermal relay U6 to adjust the current for frequency conversion speed regulation.

[0056] The energy feedback device includes an input reactor L1, an input filter L2, a surge arrester J2, a current-limiting resistor R2, transistors VT1, VT2, VT3, VT4, VT5, VT6, a three-phase capacitor C1, and a capacitor C2.

[0057] One end of the input reactor L1 is electrically connected to the surge arrester J2. The other end of the input reactor L1 is electrically connected to the three-phase capacitor C1 and one end of the input filter L2. The other end of the input filter L2 is electrically connected to transistors VT1 and VT6. Transistors VT1 and VT6 are connected in series, transistors VT2 and VT5 are connected in series, transistors VT3 and VT4 are connected in series and in parallel with capacitor C2. One end of resistor R2 is electrically connected to capacitor C2, and the other end of resistor R2 is electrically connected to the DC bus J1.

[0058] The energy feedback device controls the feedback current, which is then filtered by an output filter and a reactor to suppress harmonic current. The filter capacitor ensures the stability of the current, guaranteeing a good sinusoidal nature of the feedback current. This effectively solves the harmonic pollution of the power grid caused by the feedback current in traditional energy feedback systems, and improves the safety and stability of the system.

[0059] like Figure 3 As shown, the current detection circuit of the energy feedback device includes a Hall sensor U7, an operational amplifier U8, capacitors C3, C4, C5, and resistors R3, R4, R5, and R6;

[0060] Pin 6 of Hall sensor U7 is electrically connected to one end of capacitor C3. The other end of capacitor C3 is electrically connected to pin 5 of Hall sensor U7 and GND. Pin 8 of Hall sensor U7 is electrically connected to +5V. Pin 7 of Hall sensor U7 is electrically connected to one end of resistor R4. The other end of resistor R4 is electrically connected to one end of resistor R3, one end of capacitor C4, and the non-inverting input of operational amplifier U8. The other end of resistor R3 is electrically connected to the other end of capacitor C4 and the output of operational amplifier U8. The inverting input of operational amplifier U8 is electrically connected to one end of resistor R5, one end of capacitor C5, and one end of resistor R6. The other end of resistor R5 is electrically connected to +5V. The other end of capacitor C5 is electrically connected to the other end of resistor R6 and GND. The positive and negative power supplies of operational amplifier U8 are connected to +5V.

[0061] The feedback parameter of the inner current loop is the feedback current value. Considering accuracy and measurement range, a Hall sensor is selected in the hardware design. When the feedback current flows through the copper current path, it generates a magnetic field, which is then sensed by the on-chip Hall IC and converted into a proportional voltage, thereby realizing the I-V conversion output. Since the upper limit of the A / D input voltage amplitude of the DSP is 3.3V, it needs to be level shifted and amplified by the operational amplifier to obtain a signal that the main control chip DSP can receive. During detection, one phase current is synthesized from the other two phases of the three-phase current.

[0062] like Figure 4 As shown, the voltage detection circuit of the energy feedback device includes operational amplifiers U9, U10, U11, and U12, resistors R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, and R17, capacitors C7, C8, C9, C10, and C11, and an optocoupler U13.

[0063] The inverting input of operational amplifier U9 is electrically connected to one end of resistor R7 and one end of resistor R12. The other end of resistor R7 is grounded. The other end of resistor R12 is electrically connected to the output of operational amplifier U9 and one end of resistor R13. The non-inverting input of operational amplifier U9 is electrically connected to one end of resistor R9 and one end of resistor R11. The other end of resistor R9 is electrically connected to one end of resistor R8 and capacitor C7. The other end of resistor R11 is electrically connected to one end of resistor R10 and capacitor C6. The other end of capacitor C7 is grounded. The other end of capacitor C6 is electrically connected to GND. The positive power supply of operational amplifier U9 is connected to +5V, and the negative power supply is grounded. The inverting input of operational amplifier U10 is electrically connected to the other end of resistor R13. The non-inverting input of operational amplifier U10 is electrically connected to the negative power supply and GND. The positive power supply of operational amplifier U10 is connected to +5V. The output of operational amplifier U10 is electrically connected to one end of capacitor C8 and one end of resistor R14. The other end of capacitor C8 is electrically connected to one end of capacitor C9. The other end of capacitor C9 is connected to optocoupler U. Pin 3 of optocoupler U13 is electrically connected; the other end of resistor R13 is electrically connected to pin 1 of optocoupler U13; pin 2 of optocoupler U13 is electrically connected to +5V; pins 4 and 5 of optocoupler U13 are grounded; pin 6 of optocoupler U13 is electrically connected to one end of resistor R15, one end of capacitor C10, and the inverting input of operational amplifier U11; the non-inverting input of operational amplifier U11 is electrically connected to the negative power supply and GND; the positive power supply of operational amplifier U11 is electrically connected to +5V; the output of operational amplifier U11... The output terminal is electrically connected to the other end of resistor R15, the other end of capacitor C10, and one end of resistor R16. The other end of resistor R16 is electrically connected to one end of capacitor C11 and the non-inverting input terminal of operational amplifier U12. The other end of capacitor C11 is electrically connected to the negative power supply and GND of operational amplifier U12. The positive power supply of operational amplifier U12 is electrically connected to +5V. The inverting input terminal of operational amplifier U12 is electrically connected to one end of resistor R17. The other end of resistor R17 is electrically connected to the output terminal of operational amplifier U12.

[0064] To determine the operating status of the energy feedback unit and implement timely overvoltage protection, real-time measurement of the DC bus voltage is required. The sampled DC bus voltage is divided by a high-precision resistor, then passed through a differential amplifier circuit to obtain the actual voltage value. This voltage is then boosted by an adder composed of operational amplifiers to achieve amplitude shift, and finally output as the actual sampled signal via a voltage follower. The output is first isolated by an optocoupler before being sent to a microcontroller for processing.

[0065] like Figure 5As shown, the zero-crossing detection circuit of the energy feedback device includes operational amplifiers U14 and U15, resistors R18, R19, and R20, capacitors C12, C13, C14, C15, and C16, a microcontroller U16, and diodes J3 and J4.

[0066] Operational amplifier U14's inverting input and output terminals are electrically connected to one end of resistor R18. Operational amplifier U14's positive power supply is connected to +15V and one end of capacitor C12, while its negative power supply is connected to -15V and one end of capacitor C13. The other end of capacitor C12 and capacitor C13 are grounded. The other end of resistor R18 is electrically connected to operational amplifier U15's inverting input terminal. Operational amplifier U15's non-inverting input terminal is grounded. Operational amplifier U15's positive power supply is connected to +15V and one end of capacitor C14, while its negative power supply is connected to -15V and one end of capacitor C14. The 5V terminal is electrically connected to one end of capacitor C15, the other end of capacitor C14 is grounded, the other end of capacitor C15 is grounded, the output terminal of operational amplifier U15 is electrically connected to the negative terminal of diode J3, the positive terminal of diode J4, and one end of microcontroller U16, the positive terminal of diode J3 is electrically connected to one end of capacitor C16 and GND, the other end of capacitor C16 is electrically connected to one end of resistor R19, the other end of resistor R19 is electrically connected to VCC, the negative terminal of diode J4 is electrically connected to VCC, and the other end of microcontroller U16 is electrically connected to resistor R20.

[0067] This feedback unit uses zero-crossing detection to obtain the phase and frequency of the power grid. The AC low voltage after phase A voltage is divided by resistors enters the inverting input of the amplifier. Only when this AC low voltage signal crosses zero from positive will the output terminal output a synchronous zero-crossing detection pulse. The output zero-crossing signal is also inverted to improve the signal's anti-interference performance. In order to be received by the microcontroller DSP, voltage conversion is also performed through a voltage conversion chip.

[0068] It also provides a method for using a tippler energy feedback system, such as... Figure 6 As shown, it includes the following steps:

[0069] S1, put the energy feedback device into operation. After the equipment runs normally for one cycle, record the reverse active power W1 of the electricity meter and adjust the working factor of the tippler operation process.

[0070] S2, after the single factor adjustment is completed, the equipment runs normally for one cycle and records the reverse active power W2 of the energy meter.

[0071] S3, repeat step S2, continuously adjust the work process and record the reverse active power Wn of the energy meter;

[0072] S4. Select the operation process with the largest reverse active power value as the final optimized operation process of the tipper.

[0073] Step S2 specifically includes:

[0074] The single factor includes adjusting the acceleration / deceleration time of the equipment operation, the speed reduction data, the size of the high-speed operation range, the size of the medium-speed operation range, and the size of the low-speed operation range.

[0075] Step S3 specifically includes:

[0076] When the reverse active power value W2 is greater than W1, it is beneficial to record this adjustment.

[0077] The multi-functional energy meter is installed on the incoming power supply side.

[0078] Step 1: After the energy feedback device is put into operation, the equipment runs normally for one cycle and records the reverse active power W1 of the electricity meter. This part of the energy is the energy recovered by the energy feedback device and fed back to the grid.

[0079] Step 2: Adjust the tippler's operating procedure, such as adjusting the acceleration and deceleration times of the equipment, and the size of the high, medium, and low speed operating areas;

[0080] Step 3: After the single factor adjustment is completed, the equipment runs normally for one cycle and the reverse active power W2 of the energy meter is recorded; when the reverse active power W2 value is greater than W1, it proves that the adjustment is beneficial.

[0081] Step 4: Repeat step 3, continuously adjusting the work process and recording the reverse active power Wn of the electricity meter;

[0082] Step 5: Select the operation process with the largest reverse active power value as the final optimized operation process of the tippler, so as to give back more power to the grid while doing the same useful work.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tippler energy feedback system, characterized in that, The system includes a frequency converter module, an energy feedback device, and a multi-functional energy meter module; The frequency converter module is electrically connected to the multi-functional energy meter module and the energy feedback device respectively, and is used for frequency conversion speed regulation; The multi-functional energy meter module is electrically connected to both the frequency converter module and the energy feedback device, and is used to record the energy changes of the tippler. The multi-functional energy meter module includes a multi-functional meter G, a circuit breaker S1, a contactor S2, a circuit breaker S3, a fuse N, an input filter U1, and an input reactor U2. Circuit breaker S1 controls the on / off state of three circuits R, S, and T. Multifunctional instrument G is electrically connected to circuit breaker S3. One end of fuse N is electrically connected to one end of contactor S2. The other end of fuse N is electrically connected to one end of input filter U1. The other end of input filter U1 is electrically connected to one end of input reactor U2. The other end of input reactor U2 is electrically connected to frequency converter module. The three circuits R, S, and T are the R phase, S phase, and T phase of a three-phase AC power supply. The other end of contactor S2 is electrically connected to one end of circuit breaker S1, one end of circuit breaker S3, and multifunctional instrument G. One end of circuit breaker S3 is electrically connected to one end of circuit breaker S1 and multifunctional instrument G. The other end of circuit breaker S3 is electrically connected to energy feedback device. The other end of circuit breaker S1 is electrically connected to the three circuits R, S, and T. The energy feedback device is electrically connected to the multi-functional energy meter module and the frequency converter module respectively, and is used to recover braking energy; The zero-crossing detection circuit of the energy feedback device includes operational amplifiers U14 and U15, resistors R18, R19, and R20, capacitors C12, C13, C14, C15, and C16, a microcontroller U16, and diodes J3 and J4. Operational amplifier U14's inverting input and output terminals are electrically connected to one end of resistor R18. Operational amplifier U14's positive power supply is connected to +15V and one end of capacitor C12, while its negative power supply is connected to -15V and one end of capacitor C13. The other end of capacitor C12 and capacitor C13 are grounded. The other end of resistor R18 is electrically connected to operational amplifier U15's inverting input terminal. Operational amplifier U15's non-inverting input terminal is grounded. Operational amplifier U15's positive power supply is connected to +15V and one end of capacitor C14, while its negative power supply is connected to -15V and one end of capacitor C14. The 5V terminal is electrically connected to one end of capacitor C15, the other end of capacitor C14 is grounded, the other end of capacitor C15 is grounded, the output terminal of operational amplifier U15 is electrically connected to the negative terminal of diode J3, the positive terminal of diode J4, and one end of microcontroller U16, the positive terminal of diode J3 is electrically connected to one end of capacitor C16 and GND, the other end of capacitor C16 is electrically connected to one end of resistor R19, the other end of resistor R19 is electrically connected to VCC, the negative terminal of diode J4 is electrically connected to VCC, and the other end of microcontroller U16 is electrically connected to resistor R20.

2. The tippler energy feedback system as described in claim 1, characterized in that, The frequency converter module includes a rectifier U3, a current-limiting resistor R1, a DC bus J1, an inverter U4, an output reactor U5, and a thermal relay U6; One end of rectifier U3 is electrically connected to the other end of input reactor U2. The other end of rectifier U3 is electrically connected to one end of resistor R1 and one end of DC bus J1. The other end of resistor R1 is electrically connected to one end of DC bus J1. The other end of DC bus J1 is electrically connected to one end of inverter U4 and energy feedback device. The other end of inverter U4 is electrically connected to one end of output reactor U5. The other end of output reactor U5 is electrically connected to one end of thermal relay U6. The other end of thermal relay U6 is electrically connected to the three-phase input terminal of the three-phase AC motor of tipper.

3. The tippler energy feedback system as described in claim 2, characterized in that, The energy feedback device includes an input reactor L1, an input filter L2, a surge arrester J2, a current-limiting resistor R2, transistors VT1, VT2, VT3, VT4, VT5, VT6, a three-phase capacitor C1, and a capacitor C2. One end of the input reactor L1 is electrically connected to the surge arrester J2. The other end of the input reactor L1 is electrically connected to the three-phase capacitor C1 and one end of the input filter L2. The other end of the input filter L2 is electrically connected to transistors VT1 and VT6. Transistors VT1 and VT6 are connected in series, transistors VT2 and VT5 are connected in series, transistors VT3 and VT4 are connected in series and in parallel with capacitor C2. One end of resistor R2 is electrically connected to capacitor C2, and the other end of resistor R2 is electrically connected to the DC bus J1.

4. The tippler energy feedback system as described in claim 3, characterized in that, The current detection circuit of the energy feedback device includes a Hall sensor U7, an operational amplifier U8, capacitors C3, C4, and C5, and resistors R3, R4, R5, and R6. Pin 6 of Hall sensor U7 is electrically connected to one end of capacitor C3. The other end of capacitor C3 is electrically connected to pin 5 of Hall sensor U7 and GND. Pin 8 of Hall sensor U7 is electrically connected to +5V. Pin 7 of Hall sensor U7 is electrically connected to one end of resistor R4. The other end of resistor R4 is electrically connected to one end of resistor R3, one end of capacitor C4, and the non-inverting input of operational amplifier U8. The other end of resistor R3 is electrically connected to the other end of capacitor C4 and the output of operational amplifier U8. The inverting input of operational amplifier U8 is electrically connected to one end of resistor R5, one end of capacitor C5, and one end of resistor R6. The other end of resistor R5 is electrically connected to +5V. The other end of capacitor C5 is electrically connected to the other end of resistor R6 and GND. The positive and negative power supplies of operational amplifier U8 are connected to +5V.

5. The tippler energy feedback system as described in claim 4, characterized in that, The voltage detection circuit of the energy feedback device includes operational amplifiers U9, U10, U11, and U12, resistors R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, and R17, capacitors C6, C7, C8, C9, C10, and C11, and an optocoupler U13. The inverting input of operational amplifier U9 is electrically connected to one end of resistor R7 and one end of resistor R12, with the other end of resistor R7 grounded. The other end of resistor R12 is electrically connected to the output of operational amplifier U9 and one end of resistor R13. The non-inverting input of operational amplifier U9 is electrically connected to one end of resistor R9 and one end of resistor R11, with the other end of resistor R9 connected to one end of resistor R8 and one end of capacitor C7. The other end of resistor R11 is electrically connected to one end of resistor R10 and one end of capacitor C6, with the other end of capacitor C7... One end of the capacitor is electrically connected to the other end of capacitor C6 and GND respectively. The positive power supply of operational amplifier U9 is connected to +5V, and the negative power supply is grounded. The inverting input of operational amplifier U10 is electrically connected to the other end of resistor R13. The non-inverting input of operational amplifier U10 is electrically connected to the negative power supply and GND respectively. The positive power supply of operational amplifier U10 is connected to +5V. The output of operational amplifier U10 is electrically connected to one end of capacitor C8 and one end of resistor R14 respectively. The other end of capacitor C8 is electrically connected to one end of capacitor C9. The other end of capacitor C9 is connected to the optocoupler. Pin 3 of optocoupler U13 is electrically connected; the other end of resistor R13 is electrically connected to pin 1 of optocoupler U13; pin 2 of optocoupler U13 is electrically connected to +5V; pins 4 and 5 of optocoupler U13 are grounded; pin 6 of optocoupler U13 is electrically connected to one end of resistor R15, one end of capacitor C10, and the inverting input of operational amplifier U11; the non-inverting input of operational amplifier U11 is electrically connected to the negative power supply and GND; the positive power supply of operational amplifier U11 is electrically connected to +5V; the output of operational amplifier U11... The output terminal is electrically connected to the other end of resistor R15, the other end of capacitor C10, and one end of resistor R16. The other end of resistor R16 is electrically connected to one end of capacitor C11 and the non-inverting input terminal of operational amplifier U12. The other end of capacitor C11 is electrically connected to the negative power supply and GND of operational amplifier U12. The positive power supply of operational amplifier U12 is electrically connected to +5V. The inverting input terminal of operational amplifier U12 is electrically connected to one end of resistor R17. The other end of resistor R17 is electrically connected to the output terminal of operational amplifier U12.

6. A method of using a tippler energy feedback system, implemented based on the tippler energy feedback system according to any one of claims 1-5, characterized in that, Includes the following steps: S1, put the energy feedback device into operation. After the equipment runs normally for one cycle, record the reverse active power W1 of the electricity meter and adjust the working factor of the tippler operation process. S2, after the single factor adjustment is completed, the equipment runs normally for one cycle and records the reverse active power W2 of the energy meter. S3, repeat step S2, continuously adjust the work process and record the reverse active power Wn of the energy meter; S4. Select the operation process with the largest reverse active power value as the final optimized operation process of the tipper.

7. The method of using the tippler energy feedback system as described in claim 6, characterized in that, Step S2 specifically includes: The single factor includes adjusting the acceleration / deceleration time of the equipment operation, the speed reduction data, the size of the high-speed operation range, the size of the medium-speed operation range, and the size of the low-speed operation range.

8. The method of using the tippler energy feedback system as described in claim 7, characterized in that, Step S3 specifically includes: When the reverse active power value W2 is greater than W1, it is beneficial to record this adjustment.

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