Energy feedback circuit of transfer system in electric power material bin

Abstract

The utility model provides an energy feedback circuit of a transfer system in an electric power material bin, which is arranged in storage equipment and comprises a switch unit, an electric energy conversion unit and a trigger unit which are connected in parallel at two ends of a driving circuit of a motor in the storage equipment. And the trigger unit receives the brake signal and correspondingly outputs a trigger signal to the switch unit according to the brake signal so as to switch the on-off state of the switch unit. Therefore, when the brake signal is not received, the switch unit is kept in an off state, and the driving circuit of the motor is disconnected from the electric energy conversion unit; and when the brake signal is received, the switch unit is switched to an on state, the driving circuit of the motor is electrically connected with the electric energy conversion unit, and the driving circuit of the motor feeds induced current into the electric energy conversion unit. Therefore, the reverse induction current generated in the braking process of the motor is directly introduced into the electric energy conversion unit of the feedback circuit through the energy feedback circuit, the induction current is converted into feed to the energy storage unit to increase energy storage of equipment, and the running time of the system is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of intelligent warehousing systems, and particularly to an energy feedback circuit for an in-warehouse transfer system of electric power materials. Background Art

[0002] In a warehousing system, especially in an intelligent warehousing system such as a stereoscopic warehouse, a large number of mobile devices are required to rotate between various positions, so as to carry the goods at each position through the mobile devices to achieve the handling and management of the goods. However, each device in the in-warehouse transfer system needs to rely on its own battery system to provide power, and a large amount of time is required for charging after the electrical energy of each device is exhausted before it can continue to operate. Thus, the power storage capacity and energy consumption level of the mobile devices inside the warehousing system have gradually become the bottleneck of the operating capacity of the entire intelligent warehousing system.

[0003] To solve this dilemma, energy recovery solutions for mobile devices have gradually emerged in the prior art. However, in the existing solutions, the return of kinetic energy during the braking process usually relies on mechanical devices. The existing devices consume the original kinetic energy of the device through a friction drive wheel or drive shaft, convert this kinetic energy into a driving force for the power generation unit, and further convert the kinetic energy consumed during the braking process into electrical energy for storage. However, in this process, a large amount of the mechanical energy against which the braking acts will be consumed in the heat loss that cannot be converted into electrical energy reserves during the friction and conversion processes. Therefore, there is an urgent need for a technical solution that can efficiently convert the braking energy of certain devices into their electrical energy reserves. Summary of the Utility Model

[0004] In order to solve the deficiencies of the prior art, the purpose of this application is to provide an energy feedback circuit for an in-warehouse transfer system of electric power materials. By connecting an energy feedback circuit in parallel in the drive circuit of the motor in this application, the reverse induced current generated by the rotation of the coil during the braking process of the motor can be directly introduced into the electric energy conversion unit of the feedback circuit, and the induced current is converted into a feed of electrical energy to the energy storage unit to increase the energy storage of the device and extend the operating time of the system.

[0005] To achieve the above object, the present application provides an energy feedback circuit for a power material in-warehouse transfer system, which is arranged in a warehousing device and includes: a switch unit connected in parallel across the two ends of the driving circuit of the motor in the warehousing device, which is respectively connected between the high-voltage end and the ground end of the driving circuit of the motor; an electric energy conversion unit connected between the switch unit at the high-voltage end and the ground end; a trigger unit connected to the switch unit, which receives a braking signal and outputs a trigger signal to the switch unit to switch the on-off state of the switch unit; when no braking signal is received, the switch unit remains in the off state, and the current output path between the driving circuit of the motor and the electric energy conversion unit is disconnected; when a braking signal is received, the switch unit switches to the on state, the driving circuit of the motor is electrically connected to the electric energy conversion unit, and the driving circuit of the motor feeds an induced current into the electric energy conversion unit.

[0006] Optionally, for the energy feedback circuit of the power material in-warehouse transfer system as described in any one of the above, wherein the electric energy conversion unit includes: a voltage stabilizing bridge, a filtering circuit, and a voltage modulation circuit cascaded in sequence from the driving circuit of the motor to the power storage unit.

[0007] Optionally, for the energy feedback circuit of the power material in-warehouse transfer system as described in any one of the above, wherein the power storage unit is a second battery unit independent of the battery of the warehousing device, or the battery of the warehousing device is reused.

[0008] Optionally, for the energy feedback circuit of the power material in-warehouse transfer system as described in any one of the above, wherein the trigger unit is an independently arranged MCU chip, which is connected to a braking button or the braking signal output terminal of the main control unit of the warehousing device; or the trigger unit is integrated inside the main control unit of the warehousing device.

[0009] Optionally, for the energy feedback circuit of the power material in-warehouse transfer system as described in any one of the above, wherein the switch unit includes: a first switch tube connected between the high-voltage end of the driving circuit of the motor and the positive power feeding end of the electric energy conversion unit; a second switch tube connected between the ground end of the driving circuit of the motor and the negative power feeding end of the electric energy conversion unit; the control ends of the first switch tube and the second switch tube are respectively connected to the trigger unit; a unidirectional current limiting tube connected in parallel with the switch tube, having a single current conduction direction.

[0010] Optionally, for the energy feedback circuit of the power material in-warehouse transfer system as described in any one of the above, wherein the first switch tube and the second switch tube are respectively NMOSFET field effect tubes.

[0011] Optionally, for the energy feedback circuit of the in-warehouse transfer system for electric power materials as described in any one of the above, wherein the source of the first switching tube is connected to the positive power feeding terminal of the electric energy conversion unit, the drain of the first switching tube is connected to the high voltage terminal of the drive circuit of the motor, and the gate of the first switching tube is connected to the triggering unit.

[0012] Optionally, for the energy feedback circuit of the in-warehouse transfer system for electric power materials as described in any one of the above, wherein the source of the second switching tube is connected to the negative power feeding terminal of the electric energy conversion unit, the drain of the second switching tube is connected to the grounding terminal of the drive circuit of the motor, and the gate of the second switching tube is connected to the triggering unit.

[0013] Optionally, for the energy feedback circuit of the in-warehouse transfer system for electric power materials as described in any one of the above, wherein the unidirectional current limiting tube is a diode or a light emitting diode, its positive pole is connected to the electric energy conversion unit, and its negative pole is connected to the high voltage terminal or the grounding terminal of the drive circuit of the motor.

[0014] The present application has the following technical effects compared with the existing solutions:

[0015] The energy feedback circuit of the in-warehouse transfer system for electric power materials provided by the present application is arranged in a warehousing device and includes: a switching unit connected in parallel across both ends of the drive circuit of a motor in the warehousing device, an electric energy conversion unit connected between the high voltage terminal, the grounding terminal of the drive circuit of the motor and the switching unit, and a triggering unit connected to the switching unit. In the present application, the triggering unit receives a braking signal and accordingly outputs a triggering signal to the switching unit to switch the on / off state of the switching unit. Thus, when no braking signal is received, the switching unit remains in the off state, and the current output path between the drive circuit of the motor and the electric energy conversion unit is disconnected; when a braking signal is received, the switching unit switches to the on state, the drive circuit of the motor is electrically connected to the electric energy conversion unit, and the drive circuit of the motor feeds an induced current into the electric energy conversion unit. Thus, the present application can directly introduce the reverse induced current generated by the rotation of the coil during the braking of the motor into the electric energy conversion unit of the feedback circuit through the energy feedback circuit, and increase the energy storage of the device by converting the induced current into power feeding to the energy storage unit, thereby extending the operation time of the system.

[0016] Other features and advantages of the present application will be described in the subsequent specification, and part of them will become obvious from the specification or be understood by implementing the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application. In the drawings:

[0018] Figure 1A storage device applying the energy feedback circuit of the present application;

[0019] Figure 2 This is the schematic diagram of the energy feedback circuit of the present application.

[0020] In the figure, M represents the motor and its drive circuit; 1 represents the reducer; 2 represents the drive shaft; 3 represents the traveling wheel. Specific embodiments

[0021] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0022] The meaning of "and / or" described in the present application refers to the situation where each exists alone or both exist simultaneously.

[0023] The meaning of "inside and outside" described in the present application refers to, with respect to the storage device itself, the direction from its outer shell to the motor installation position inside the storage device is inside, and vice versa; it is not a specific limitation on the device mechanism of the present application.

[0024] The meaning of "left and right" described in the present application refers to, when the user is facing the forward direction of the storage device, the left side of the user is left, and the right side of the user is right; it is not a specific limitation on the device mechanism of the present application.

[0025] The meaning of "connection" described in the present application can be a direct connection between components or an indirect connection between components through other components.

[0026] The meaning of "up and down" described in the present application refers to, when the user is facing the forward direction of the storage device, the direction from the track system to the shelf lifting is up, and vice versa; it is not a specific limitation on the device mechanism of the present application.

[0027] The energy feedback circuit of the power material transfer system provided by the present application is arranged in movable storage devices such as four-way shuttles and AGV forklifts.

[0028] For the four-way shuttle, its motor is controlled by the drive circuit to operate, output torque, drive the reducer 1, and then drive the drive shafts in the horizontal and vertical directions through the transmission structure connected to the output shaft of the reducer 1, and correspondingly drive the traveling wheels at different positions and different operating directions on the four-way shuttle body to drive the equipment to run along the corresponding tracks.

[0029] In the prior art, if it is necessary to recover the kinetic energy of a device during the braking process of the device, a braking wheel that can abut against the outside of the traveling wheel needs to be provided outside the traveling wheel. The traveling wheel is decelerated by the frictional force of the braking wheel, and the power generation unit is correspondingly driven by the reverse rotation of the braking wheel, and the braking kinetic energy is converted into electrical energy and stored in the electricity storage unit of the device.

[0030] However, during this process, a large amount of heat loss will occur during the transmission process of friction and braking kinetic energy. Therefore, the recovery efficiency is not high, and it is difficult to actually restore the energy storage level of the device.

[0031] Therefore, the present application provides the Figure 2 energy feedback circuit shown in the figure, which realizes the recovery of the kinetic energy of the motor during braking through the following circuit structure connected in parallel at both ends of the drive circuit of the motor in the warehousing equipment:

[0032] A switch unit, which is respectively connected between the high-voltage end and the ground end of the drive circuit of the motor, forming an electrically connected line that can be switched on and off according to the braking state;

[0033] An electric energy conversion unit, which is connected between the switch unit at the high-voltage end and the ground end, generally including: a voltage stabilizing bridge, a filtering circuit, and a voltage modulation circuit cascaded in sequence from the drive circuit of the motor to the electricity storage unit. By converting the reverse induced current generated by the rotation of the coil during the braking process of the motor into a DC signal, and performing corresponding filtering and voltage regulation on the DC signal to form a voltage modulation signal that can charge the electricity storage unit, thereby realizing the conversion and storage of the kinetic energy during the braking process of the motor;

[0034] A trigger unit, which can be selected as an independently set MCU chip or directly integrated inside the main control unit of the warehousing equipment. Regardless of which setting method, the trigger unit needs to be connected to the switch unit, so as to output a trigger signal to the switch unit according to the received braking signal to switch the on-off state of the switch unit.

[0035] When no braking signal is received, the switch unit is kept in the off state by the trigger signal of the trigger unit. In this state, the current output path between the drive circuit of the motor and the electric energy conversion unit is disconnected, and the motor only operates according to the signal of its drive circuit to realize the power output to the traveling wheel of the device;

[0036] When a braking signal is received, the switch unit is switched to the on state by the trigger signal of the trigger unit. The drive circuit of the motor is electrically connected to the electric energy conversion unit, and the drive circuit of the motor feeds an induced current into the electric energy conversion unit. The reverse induced current is stored by feeding power to the electricity storage unit through the voltage stabilizing bridge, filtering circuit, and voltage modulation circuit cascaded in sequence from the drive circuit of the motor to the electricity storage unit.

[0037] The electricity storage unit for recovery energy storage can be flexibly set as a second battery unit independent of the storage device battery, or the battery of the storage device itself can be directly reused to store the reverse induction current during the braking process. Regardless of the form, the electricity stored in reverse can be provided to the drive circuit of the motor through the corresponding power supply circuit during normal operation of the motor to supply energy to the device, delay the loss of its own power in the device, thereby reducing the charging times of the device and extending the effective operation duration between each charge.

[0038] Specifically, in this application, the trigger unit is connected to the braking button of the storage device or the braking signal output terminal of the main control unit in the storage device, so that it outputs a trigger signal to the switch unit according to the braking situation. In this application, the switch unit generally includes:

[0039] A first switch tube, which is connected between the high-voltage end of the drive circuit of the motor and the positive power feeding end of the power conversion unit;

[0040] A second switch tube, which is connected between the grounding end of the drive circuit of the motor and the negative power feeding end of the power conversion unit;

[0041] And unidirectional current limiting tubes respectively connected in parallel with the first and second switch tubes.

[0042] Among them, the control ends of the first switch tube and the second switch tube are respectively connected to the trigger unit; the unidirectional current limiting tube has a single current conduction direction, which can limit the flow direction of the reverse charging current and provide an electrical path for power output when supplying power to the motor drive circuit through the electricity storage unit.

[0043] The above-mentioned first switch tube and second switch tube can be respectively set as NMOSFET field effect tubes. Among them, the source of the first switch tube is connected to the positive power feeding end of the power conversion unit, the drain of the first switch tube is connected to the high-voltage end of the drive circuit of the motor, and the gate of the first switch tube is connected to the trigger unit. The source of the second switch tube is connected to the negative power feeding end of the power conversion unit, the drain of the second switch tube is connected to the grounding end of the drive circuit of the motor, and the gate of the second switch tube is connected to the trigger unit.

[0044] The above-mentioned unidirectional current limiting tube can be correspondingly set as a diode or a light-emitting diode, which provides a unidirectional conductive path by connecting the positive pole to the power conversion unit and the negative pole to the high-voltage end or the grounding end of the drive circuit of the motor, and limits the reverse induction current to be fed into the electricity storage unit through the conductive path of the field effect tube during the braking process of the motor; while when supplying the electricity in the electricity storage unit to the motor drive circuit, it can be directly supplied to the motor end with low loss through the conductive path of the diode.

[0045] The advantages of this application are:

[0046] The kinetic energy during braking is directly recovered by a circuit device. It can avoid the heat loss of braking energy during the existing friction braking recovery process, improve the system recovery efficiency, simplify the hardware structure for braking recovery on the device, reduce the device cost, and effectively extend the effective working duration of a single charge of the device.

[0047] Those of ordinary skill in the art can understand that the above are only preferred embodiments of the present application and are not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An energy feedback circuit of a transfer system inside a power material warehouse, characterized in that, The energy feedback circuit is provided in a warehousing device and includes components connected in parallel across the two ends of the drive circuit of the motor in the warehousing device: A switch unit, which is respectively connected between the high-voltage end and the ground end of the drive circuit of the motor; An electric energy conversion unit, which is connected between the switch unit at the high-voltage end and the ground end; A trigger unit, which is connected to the switch unit. The trigger unit receives a braking signal and outputs a trigger signal to the switch unit to switch the on-off state of the switch unit; When no braking signal is received, the switch unit remains in the off state, and the current output path between the drive circuit of the motor and the electric energy conversion unit is disconnected; When a braking signal is received, the switch unit switches to the on state, the drive circuit of the motor is electrically connected to the electric energy conversion unit, and the drive circuit of the motor feeds an induced current into the electric energy conversion unit.

2. The energy feedback circuit of the in-warehouse transfer system for electric power materials according to claim 1, characterized in that The electric energy conversion unit includes: a voltage stabilizing bridge, a filtering circuit, and a voltage modulation circuit, which are cascaded from the drive circuit of the motor to the power storage unit in sequence.

3. The energy feedback circuit of the in-warehouse transfer system for electric power materials according to claim 2, wherein The power storage unit is a second battery unit independent of the battery of the warehousing device, or the battery of the warehousing device is reused.

4. The energy feedback circuit of the in-warehouse transfer system for electric power materials according to claim 1, characterized in that The trigger unit is an independently provided MCU chip, which is connected to a braking button or the braking signal output terminal of the main control unit of the warehousing device; Alternatively, the trigger unit is integrated inside the main control unit of the warehousing device.

5. The energy feedback circuit of the in-warehouse transfer system for electric power materials according to claim 1, wherein The switch unit includes: A first switch tube, which is connected between the high-voltage end of the drive circuit of the motor and the positive power supply terminal of the electric energy conversion unit; A second switch tube, which is connected between the ground end of the drive circuit of the motor and the negative power supply terminal of the electric energy conversion unit; The control ends of the first switch tube and the second switch tube are respectively connected to the trigger unit; A unidirectional current limiting tube, which is connected in parallel with the switch tube and has a single current conduction direction.

6. The energy feedback circuit of the in-warehouse transfer system for electric power materials according to claim 5, wherein The first switch tube and the second switch tube are respectively NMOSFET field effect tubes.

7. The energy feedback circuit of the in-warehouse transfer system for electric power materials according to claim 6, characterized in that, The source electrode of the first switch tube is connected to the positive power supply terminal of the electric energy conversion unit, the drain electrode of the first switch tube is connected to the high-voltage end of the drive circuit of the motor, and the gate electrode of the first switch tube is connected to the trigger unit.

8. The energy feedback circuit of the in-warehouse transfer system for electric power materials according to claim 6, characterized in that, The source electrode of the second switch tube is connected to the negative power supply terminal of the electric energy conversion unit, the drain electrode of the second switch tube is connected to the ground end of the drive circuit of the motor, and the gate electrode of the second switch tube is connected to the trigger unit.

9. The energy feedback circuit of the in-warehouse transfer system for electric power materials according to claim 5, characterized in that The unidirectional current limiting tube is a diode or a light-emitting diode, its positive electrode is connected to the electric energy conversion unit, and its negative electrode is connected to the high-voltage end or the ground end of the drive circuit of the motor.

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