Low-voltage non-contact power supply AGV switch control circuit

Abstract

The utility model discloses a low-voltage non-contact power supply AGV on-off control circuit, belongs to the technical field of electrical control, and solves the problem that a large amount of unnecessary manpower and time can be consumed by manually operating on-off of an AGV in the prior art. The device mainly comprises a power converter, a charging circuit is arranged between the power converter and a standby battery, the standby battery is communicated with the power converter, and the standby battery is electrically connected to a driving circuit; and the driving circuit is connected in parallel with a wireless control circuit and a switch control circuit. According to the utility model, through cooperation of the wireless AP and the intermediate relay, one-key startup and shutdown of the low-voltage non-contact power supply AGV is realized, the flexibility and the practicability are good, and the production efficiency and the user experience are improved; through the design of a control circuit, seamless switching between low-voltage non-contact power supply and standby battery GB power supply is realized, and the environmental applicability of the AGV is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical control, in particular to a low-voltage contactless power supply AGV switch control circuit. Background Art

[0002] AGV is the abbreviation of Automated Guided Vehicle, which refers to a transport vehicle equipped with an automatic guidance device such as electromagnetic or optical, which can travel along a specified guidance path and has safety protection and various transfer functions.

[0003] Contactless power supply technology is an effective method to achieve energy transmission from stationary equipment to stationary or mobile equipment by using modern power electronics energy conversion technology and magnetic field coupling technology, and with the help of modern control theory. Contactless power supply can replace the charging waiting problem caused by pure battery power supply, improve the operation efficiency of AGV and customer production efficiency, and is widely used in manufacturing industry; contactless power supply is divided into high voltage (DC500V / DC560V) and low voltage (DC24V~DC72V) contactless power supply according to the power supply voltage; when the AGV needs to leave the contactless power supply area due to failure and other factors, it is necessary to use the backup battery GB to power the driver. The existing AGV one-key power on and off circuit is for battery-powered AGV, and requires two sets of AGV controllers and two sets of wireless communication modules. The existing contactless power supply + backup battery GB AGV power on and off method is to manually operate the knob on the AGV to manually turn on and off. When the number of AGVs is relatively large, each AGV must be manually bent over to operate the shutdown, which consumes a lot of unnecessary manpower and time, and the user experience is poor. At present, there is a lack of a low-voltage contactless power supply AGV switch control circuit. Utility Model Content

[0004] The purpose of the utility model is to provide a low-voltage contactless power supply AGV switch control circuit to solve the problem that manual operation of the AGV switch in the prior art consumes a lot of unnecessary manpower and time.

[0005] The utility model is realized by the following technical solutions:

[0006] A low-voltage contactless power supply AGV switch control circuit includes a power converter TPM, the power converter TPM is electrically connected to an AGV circuit through a drive circuit, the AGV circuit includes a drive unit and an AGV controller, a charging circuit is provided between the power converter TPM and a backup battery GB, and the backup battery GB and the power converter TPM maintain communication, and the backup battery GB is electrically connected to the drive circuit; the drive circuit is connected in parallel with a wireless control circuit and a switch control circuit; the switch control circuit includes a power switch SL, and the switch control circuit controls the switches of the backup battery GB and the power converter TPM through the power switch SL; the wireless control circuit includes a wireless AP, the wireless AP is communicatively connected to the AGV controller, and the wireless AP is externally connected to an AGV scheduling system.

[0007] Furthermore, the wireless AP is electrically connected to a switch power supply I; and the AGV controller is electrically connected to a switch power supply II.

[0008] Furthermore, the power switch SL adopts a three-speed knob switch.

[0009] Furthermore, the power converter TPM is provided with a switch circuit I, which includes a normally closed contact SL2 of the power switch SL, and the backup battery GB is provided with a switch circuit II, which includes a normally open contact SL3 of the power switch SL.

[0010] Furthermore, the switch control circuit includes a power switch SL, an intermediate relay KA1, a contactor KM1 and a contactor KM2; the AGV controller is electrically connected to the intermediate relay KA2 and the intermediate relay KA3; the intermediate relay KA1, the contactor KM1 and the contactor KM2 are all connected in parallel to the drive circuit, one end of the normally open contact SL1 of the power switch SL is connected in series with the intermediate relay KA1, and the other end is connected in series with the normally closed contact KA21 of the intermediate relay KA2; both ends of the normally open contact SL1 are connected in parallel with the normally closed contact KA21 of the wireless AP control. The normally open contact IR1 and the normally open contact KA11 of the intermediate relay KA1; the contactor KM1 and the normally open contact KA12 of the intermediate relay KA1 are connected in series; the contactor KM2 and the normally open contact KA31 of the intermediate relay KA3 are connected in series; the normally open contact KA13 of the intermediate relay KA1 and the normally open contact SL3 of the power switch SL are connected in parallel; the normally open contact KM21 of the contactor KM2 is arranged in the charging circuit; the normally open contact KM11 of the contactor KM1 is arranged between the power converter TPM and the AGV circuit.

[0011] Furthermore, the power converter TPM is electrically connected to a power taking board THM.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model realizes one-button power on and off of a low-voltage contactless power supply AGV through a wireless AP in conjunction with an intermediate relay. The utility model has good flexibility and practicality, and can enable staff to quickly power on and off the AGV, thereby improving production efficiency and user experience. Through control circuit design, seamless switching between low-voltage contactless power supply and backup battery GB power supply is achieved, thereby improving the environmental applicability of the AGV. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a circuit schematic diagram of the utility model. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the creation of the present invention.

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Embodiment 1: A low-voltage contactless power supply AGV switch control circuit, such as Figure 1 As shown, it includes a power converter TPM, and the power converter TPM is electrically connected to the AGV circuit through a driving circuit. The AGV circuit includes a driving unit and an AGV controller. A charging circuit is provided between the power converter TPM and the backup battery GB, and the backup battery GB and the power converter TPM maintain communication, and the backup battery GB is electrically connected to the driving circuit; the driving circuit is connected in parallel with a wireless control circuit and a switch control circuit; the switch control circuit includes a power switch SL, and the switch control circuit controls the switches of the backup battery GB and the power converter TPM through the power switch SL; the wireless control circuit includes a wireless AP, and the wireless AP is communicatively connected to the AGV controller, and the wireless AP is externally connected to the AGV scheduling system; the wireless AP is electrically connected to a switching power supply I.

[0018] Embodiment 2, a low-voltage contactless power supply AGV switch control circuit, the AGV controller is electrically connected to a switch power supply II; the power switch SL adopts a three-speed knob switch; the power converter TPM is provided with a switch circuit I, the switch circuit I includes the normally closed contact SL2 of the power switch SL, the backup battery GB is provided with a switch circuit II, the switch circuit II includes the normally open contact SL3 of the power switch SL.

[0019] The switch control circuit includes a power switch SL, an intermediate relay KA1, a contactor KM1 and a contactor KM2; the AGV controller is electrically connected to an intermediate relay KA2 and an intermediate relay KA3; the intermediate relay KA1, the contactor KM1 and the contactor KM2 are all connected in parallel to the drive circuit, one end of the normally open contact SL1 of the power switch SL is connected in series with the intermediate relay KA1, and the other end is connected in series with the normally closed contact KA21 of the intermediate relay KA2; both ends of the normally open contact SL1 are connected in parallel with the normally open contact KA21 controlled by the wireless AP. The contact IR1 is connected to the normally open contact KA11 of the intermediate relay KA1; the contactor KM1 is connected in series to the normally open contact KA12 of the intermediate relay KA1; the contactor KM2 is connected in series to the normally open contact KA31 of the intermediate relay KA3; the normally open contact KA13 of the intermediate relay KA1 is connected in parallel to the normally open contact SL3 of the power switch SL; the normally open contact KM21 of the contactor KM2 is arranged in the charging circuit; the normally open contact KM11 of the contactor KM1 is arranged between the power converter TPM and the AGV circuit. The rest is the same as in Example 1.

[0020] The power board THM converts the changing magnetic field in the power supply cable laid on the ground into high-frequency current, and the power converter TPM rectifies and outputs the high-frequency electric energy received from the coil in the power board to the load. The power converter TPM can adjust the rated output voltage according to the load voltage and directly supply power to the low-voltage load. The utility model uses the power converter TPM to supply the DC48V AGV drive circuit and charge the backup battery GB. When the contactless power supply is normal, the power converter TPM directly outputs to the main circuit of the AGV to supply the motor driver and the switching power supply II; the power converter TPM communicates with the backup battery GB in real time. When the backup battery GB is low on power, the power converter TPM can charge the battery; when the contactless power supply is disconnected, it seamlessly switches to the backup battery GB for power supply, and the 48VDC output by the backup battery GB supplies power to the AGV drive circuit.

[0021] The power converter TPM and the backup battery GB each have a working switch, which can only work when the switch is turned on. A power switch SL is used in the circuit, and a knob switch is used to manually control the switches of the three components; the knob switch has three gears, the left gear is a group of self-locking normally closed contacts SL1, the middle gear is the neutral gear, and the right gear is a group of self-resetting normally open contacts SL2; the backup battery GB switch is connected to the self-locking normally closed contacts SL2 of the knob switch, that is, when the knob switch is in the neutral gear, the backup battery GB is in the power-on state, and when the knob switch is in the left gear, the backup battery GB is in the power-off state; the power converter TPM is connected to a group of self-resetting normally open contacts SL3 of the knob switch, that is, when the knob switch is in the neutral gear, the power converter TPM is in the power-off state, and when the knob switch is in the right gear, the power converter TPM is in the power-on state; the normally open contact SL3 and the normally open contact SL1 act together. The normally open contact SL1 of the power switch SL is in the middle neutral position by default, that is, the backup battery GB is in the on state by default, and the power converter TPM is in the off state by default. When the user takes a long vacation, the normally open contact SL1 of the power switch SL is moved to the left self-locking position to completely shut down the power converter TPM and the backup battery GB.

[0022] The one-button startup process of the low-voltage contactless power supply AGV: the knob switch is in the middle neutral position, the backup battery GB is in the startup discharge state, the circuit breakers QF1-QF5 are closed by default, and the backup battery GB power supply enters the switch power supply Ⅰ through the circuit breaker QF3. The switch power supply Ⅰ converts the DC48V output of the backup battery GB into DC24V to power the wireless AP. The wireless AP communicates with the AGV dispatching system in real time through the wireless network; the customer clicks the one-button startup on the AGV dispatching system interface, and the wireless AP on the AGV receives the one-button startup signal of the AGV dispatching system and turns a set of normally open contacts IR1 on the wireless AP. At this time, the intermediate relay KA1 is energized, the normally open contact of the intermediate relay KA1 is energized, the normally open contact KA12 of the intermediate relay KA1 is closed, so that the contactor KM1 coil is energized, and the normally open contact KA11 of the intermediate relay KA1 is closed to form a self-locking startup circuit; the normally open contacts 7 and 11 of the switch KA1 of the power converter TPM are closed, and the power converter TPM starts to operate normally; after the power converter TPM operates normally, the power passes through the circuit breakers QF1 and QF3 and then through the switching power supply II to convert DC54V to DC24V to power the AGV controller and other sensors, and the AGV is powered on.

[0023] Low-voltage contactless power supply AGV one-key shutdown / sleep process: The rotary switch is in the middle neutral position, the wireless AP communicates with the AGV dispatch system in real time through the wireless network, and the wireless AP communicates with the AGV controller in real time through the network cable. The customer clicks one-key shutdown / sleep on the AGV dispatch system interface, and the wireless AP on the AGV receives the one-key shutdown / sleep signal from the AGV dispatch system and transmits this signal to the AGV controller. The AGV controller controls the intermediate relay KA2 coil to attract, and the normally closed contact KA21 of the intermediate relay KA2 is disconnected, causing the coil of the intermediate relay KA1 to lose power and disconnect, and the power-on relay The normally open contacts KA12, KA11, and KA13 of KA1 are disconnected, causing the power converter TPM switch to be disconnected and stop working, and the contactor KM1 coil of the backup battery GB that discharges is de-energized and disconnected, so that the backup battery GB only supplies power to the wireless AP. The rated power consumption of the wireless AP is about 12W. The capacity of the backup battery GB of the assembled AGV is mostly above 48V30AH. Theoretically, the backup battery GB can standby normally for about 5 days, which is sufficient for the normal production of the enterprise to achieve the purpose of sleep and shutdown; when the enterprise does not use the AGV for a long time on holiday, the power is cut off by manual shutdown.

[0024] Manual startup process of low-voltage contactless power supply AGV: Circuit breakers QF1~QF5 are in the energized state by default. The rotary switch is first turned to the middle position, and then the rotary switch is turned to the right for 2 seconds and released. At this time, the intermediate relay KA1 is energized, and the normally open contact KA12 of the intermediate relay KA1 is closed to make the main circuit contactor KM1 coil energized, and the normally open contact KA11 of the intermediate relay KA1 is closed to form a self-locking startup circuit; the normally open contact KA13 of the power converter TPM is closed, and the power converter TPM starts to operate normally; after the power converter TPM works normally, the power passes through the circuit breakers QF1 and QF3 and then through the switching power supply II to convert DC54V to DC24V to power the AGV controller and other sensors, and the AGV is powered on.

[0025] Manual shutdown process of low-voltage contactless power supply AGV: turn the power switch SL1 to the left self-locking position. At this time, the normally closed contact SL2 of the backup battery GB is disconnected, the backup battery GB stops discharging, the start-up relay intermediate relay KA1 loses power and disconnects, and the normally open contacts KA11, KA12, and KA13 of the start-up relay KA1 are disconnected, causing the power converter TPM switch to disconnect and stop working. When the company does not use the AGV for a long time during holidays, the power is cut off by manual shutdown.

[0026] The process of charging the backup battery GB by the low-voltage contactless power supply AGV: After the AGV is powered on, the backup battery GB communicates with the AGV controller in real time, and the AGV controller collects the voltage, power and other data of the backup battery GB in real time. When the AGV controller detects that the power of the backup battery GB is lower than a certain threshold, the AGV controller controls the coil of the intermediate relay KA3 to be energized, and the normally open contact KA31 of the intermediate relay KA3 is energized to make the coil of the contactor KM2 of the backup battery GB energized, and the normally open contact KM21 of the contactor KM2 is energized; the power converter TPM communicates with the backup battery GB in real time, and charges the backup battery GB through the normally open contact KM21 of the contactor KM2DE1 according to the voltage, power and other data of the backup battery GB.

[0027] Seamless switching process between low-voltage contactless power supply and backup battery GB power supply: the output voltage of low-voltage contactless power supply is higher than the output voltage of backup battery GB. When the low-voltage contactless power supply works normally, the low-voltage contactless power supply will be used first to power the load; when the low-voltage contactless power supply is abnormal, the backup battery GB will seamlessly power the load.

[0028] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A low-voltage contactless power supply AGV switch control circuit, comprising a power converter TPM, wherein the power converter TPM is electrically connected to an AGV circuit via a drive circuit, wherein the AGV circuit comprises a drive unit and an AGV controller, wherein: A charging circuit is provided between the power converter TPM and the backup battery GB, and the backup battery GB and the power converter TPM maintain communication, and the backup battery GB is electrically connected to the drive circuit; the drive circuit is connected in parallel with a wireless control circuit and a switch control circuit; the switch control circuit includes a power switch SL, and the switch control circuit controls the switches of the backup battery GB and the power converter TPM through the power switch SL; the wireless control circuit includes a wireless AP, and the wireless AP is communicatively connected to the AGV controller, and the wireless AP is externally connected to the AGV scheduling system.

2. The low-voltage contactless power supply AGV switch control circuit according to claim 1 is characterized in that: The wireless AP is electrically connected to a switch power supply I; the AGV controller is electrically connected to a switch power supply II.

3. The low-voltage contactless power supply AGV switch control circuit according to claim 2 is characterized in that: The power switch SL is a three-level knob switch.

4. The low-voltage contactless power supply AGV switch control circuit according to claim 3 is characterized in that: The power converter TPM is provided with a switch circuit I, which includes a normally closed contact SL2 of the power switch SL. The backup battery GB is provided with a switch circuit II, which includes a normally open contact SL3 of the power switch SL.

5. The low-voltage contactless power supply AGV switch control circuit according to claim 4 is characterized in that: The switch control circuit includes a power switch SL, an intermediate relay KA1, a contactor KM1 and a contactor KM2; the AGV controller is electrically connected to an intermediate relay KA2 and an intermediate relay KA3; the intermediate relay KA1, the contactor KM1 and the contactor KM2 are all connected in parallel to the drive circuit, one end of the normally open contact SL1 of the power switch SL is connected in series with the intermediate relay KA1, and the other end is connected in series with the normally closed contact KA21 of the intermediate relay KA2; both ends of the normally open contact SL1 are connected in parallel with the normally open contact KA21 controlled by the wireless AP. Contact IR1 and the normally open contact KA11 of the intermediate relay KA1; contactor KM1 and the normally open contact KA12 of the intermediate relay KA1 are connected in series; contactor KM2 and the normally open contact KA31 of the intermediate relay KA3 are connected in series; the normally open contact KA13 of the intermediate relay KA1 is connected in parallel with the normally open contact SL3 of the power switch SL; the normally open contact KM21 of the contactor KM2 is arranged in the charging circuit; the normally open contact KM11 of the contactor KM1 is arranged between the power converter TPM and the AGV circuit.

6. The low-voltage contactless power supply AGV switch control circuit according to claim 1 is characterized in that: The power converter TPM is electrically connected to the power taking board THM.

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