JP6244243B2 - Electric system and electric garbage collector equipped with the same - Google Patents

Description

  The present invention relates to an electric system including an electric storage device and an electric drive device, and an electric garbage collection vehicle including the electric system, and more particularly to an apparatus that can supply electric power from an external power source.

  Conventionally, this type of electric system has a power storage device and an electric drive device, has a voltage upper limit control function, and can control the upper limit of the voltage supplied to the power storage device, and a lower limit. A device having a voltage detection function and having a power supply device or a power source or a driver that supplies electric power from the power storage device to the electric drive device so that the power storage device does not become lower than the lower limit voltage is known (for example, , See Patent Document 1).

International Publication 2012/107948 Pamphlet

  An owner of a facility such as a building or factory usually sets a contract ampere with an electric power company and uses electricity within the contract ampere. And when the external power supply of the facility is used for an electric system, the conventional electric system uses electricity without setting an upper limit of the operating current in particular, and thus is consumed when the load of the electric drive device increases. There is a problem that the current is increased and exceeds the contracted amperage, and the breaker on the external power source side is dropped to interrupt the operation.

  The present invention has been made in view of such a point, and an object of the present invention is to enable an electric drive device to be appropriately driven so that a breaker on an external power supply side does not fall.

  In order to achieve the above object, in the present invention, the electric drive device is driven so that the inverter detects the current consumption on the facility side and does not exceed the upper limit value.

Specifically, in the first invention, on the premise of an electric system provided with a power storage device and an electric drive device,
An outlet for introducing power from an external power source;
An inverter for supplying a current introduced into the outlet and a current from the power storage device to the electric drive device;
The inverter is configured to perform upper limit setting control for restricting the load from the electric drive device from increasing and the current from the external power source exceeding an upper limit value ,
When using the power storage device, when the external power source is used, upper limit setting control is performed to suppress the current supplied to the electric drive device by the inverter so that the current from the external power source is less than or equal to the upper limit value. The normal setting control without performing the upper limit setting control is performed .

According to the above configuration, in the upper limit setting control, the inverter reduces the output of the electric drive device so that the current consumption of the electric drive device does not exceed the upper limit value. Can be continuously driven. Note that the “outlet” here is for plugging in an electrical plug from an external power source for electrical connection. When the external power source is not used, the electric drive device is driven using the electric power of the power storage device, so there is no need to consider the upper limit value due to the contracted amperage, and therefore normal setting control without performing upper limit setting control is performed.

In the second invention, in the electric system similar to the first invention ,
An outlet for introducing power from an external power source;
An inverter for supplying a current introduced into the outlet and a current from the power storage device to the electric drive device;
The inverter is configured to perform upper limit setting control for restricting the load from the electric drive device from increasing and the current from the external power source exceeding an upper limit value,
The outlet is covered with a lid member,
When the lid member is opened, upper limit setting control is performed to suppress the current supplied to the electric drive device so that the current from the external power source becomes equal to or lower than the upper limit value, and the lid member is closed. Sometimes, it is configured to perform normal setting control without performing the upper limit setting control.

  According to the above configuration, when the external power source is not used, the electric drive device is driven using the electric power of the power storage device, so it is not necessary to consider the upper limit value due to the contract amperage, but it is necessary to consider the upper limit value. When the lid member is opened to take in electric power from the external power source, the operation is automatically switched to the upper limit setting control, so that it is possible to reliably prevent work interruption due to unexpected breaker down.

In the third invention, in the second invention,
An upper limit release switch for switching from the upper limit setting control to the normal setting control with the lid member opened, and an alarm device for displaying that the upper limit release switch is in operation.

  According to the above configuration, in the case of equipment with a large contracted amperage, the upper limit value of the current in the external power supply becomes large, so there is no need to perform upper limit setting control, and switching to normal setting control by operating the upper limit release switch be able to. In that case, the work can be performed efficiently with high output, and the alarm device can recognize that the upper limit is being released.

In a fourth invention, in any one of the first to third inventions,
The electric drive device includes an electric motor that drives a hydraulic pump that supplies hydraulic pressure to a plurality of work devices,
In the upper limit setting control, the inverter suppresses the rotation speed of the electric motor, so that the current from the external power source is set to be equal to or lower than the upper limit value.

According to the above configuration, by appropriately reducing the rotational speed of the electric motor by the inverter, or reduce the noise of the working device, it can be prevented or fall breaker external power source.

In the fifth invention, in the fourth invention,
The upper limit value is set in accordance with a specified value of the external power source breaker.

According to the above configuration, by appropriately reducing the rotational speed of the electric motor by the inverter, it is possible to continue driving of the working device prevents the circuit breaker of the external power supply falls.

As described above, according to the present invention, when the inverter performs the upper limit setting control for restricting the load from the electric drive device to increase and the current from the external power source exceeds the upper limit value , By not performing the upper limit setting control , the electric drive device can be appropriately driven so that the breaker on the external power supply side does not fall.

It is a figure showing the outline of an electric system. It is a side view which shows the electric dust collection vehicle which concerns on embodiment of this invention. It is sectional drawing which shows a dust loading apparatus and its periphery. It is the schematic which shows the drive system of an electric dust collection vehicle. It is a figure which shows the outline | summary of an electric system. It is a flowchart which shows control of an electric dust collection vehicle.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

-Configuration of electric garbage collection vehicle-
FIG. 2 shows an electric dust collector 1 according to an embodiment of the present invention, and a dust container 3 is mounted on a chassis 2 of the electric dust collector 1. A driver's cab 2 a is provided in front of the chassis 2. The rear opening 4 of the dust container 3 is provided with a dust input box 6 that is pivotally supported by an input box support pin 5 above it. The dust throwing box 6 is configured to be rotatable about the throwing box support pin 5 by a rotating cylinder 9 (shown only in FIG. 4) provided between the dust storage box 3 and the dust throwing box 6. ing.

  As shown in FIG. 3, a throwing port 7 is opened at the rear of the dust throwing box 6, and a dust loading device 10 is provided therein. The dust loading device 10 is for compressing and loading the dust 55 put into the dust throwing box 6 through the loading port 7 into the dust containing box 3. The dust loading device 10 includes a hydraulic motor 14 provided at the bottom of the dust throwing box 6, and a rotating plate 15 is provided on a rotating shaft of the hydraulic motor 14 so as to be rotatable around its base end. . On the upper part of the rotating plate 15, a pushing plate 11 that can swing back and forth by a swing cylinder 13 is provided. The dust 55 thrown into the dust throwing box 6 is compressed and loaded into the dust container 3 by the cooperation of the rotating action of the rotating plate 15 configured as described above and the swinging action of the pushing plate 11. .

  As shown in FIG. 3, the dust container 3 may include a discharge device 18 that discharges the dust in the dust container 3. Specifically, a discharge plate 17 is disposed in the dust container 3 so as to be slidable in the front-rear direction. The discharge plate 17 is a plate-like body formed to have substantially the same width and height as the dust storage box 3 and slides back and forth in the dust storage box 3 by the expansion and contraction operation of the discharge cylinder 16. ing.

  As shown in FIGS. 1 and 2, a rectangular parallelepiped electrical component storage box 19 is provided on the vehicle body frame 2 b between the cab 2 a and the dust storage box 3. The electrical component storage box 19 stores an electric double layer capacitor 44 as a power storage device, an inverter 20, an electric motor 46 as an electric drive device, an AVR 42b (automatic voltage control device) to be described later, and the like. The electric system 25 includes a controller 23 mounted on the vehicle that controls the movement of the electric motor 46.

  As shown in FIG. 4, the electric dust collection vehicle 1 includes a DC power generation device 42 that is driven by the vehicle engine 8. The DC power generator 42 is installed separately from a small power generator (dynamo) normally mounted on a vehicle, and includes a generator 42a that is always driven by the fan belt 8a while the vehicle engine 8 is driven. The DC power generator 42 includes an AVR 42b (automatic voltage control device) on its electrical path. The AVR 42b starts operation in response to the activation signal supplied from the controller 23, and converts the AC power of the generator 42a into DC. Further, the output voltage of the generator 42a is adjusted to be a constant target value regardless of the change in the rotational speed of the vehicle engine 8. The electric power obtained by the DC power generator 42 is configured to be able to supply electric power to the electric double layer capacitor 44 or the inverter 20 via the AVR 42b. The electric power from the DC power generation device 42 or the electric double layer capacitor 44 is adjusted by the inverter 20 and supplied to the electric motor 46.

  As shown in FIG. 4, the electric garbage collection vehicle 1 includes a hydraulic pump 31 driven by an electric motor 46, a rotating cylinder 9, a swing cylinder 13, and a discharge cylinder driven by hydraulic pressure generated by the hydraulic pump 31. 16 and a working device 30 having a hydraulic motor 14. In this embodiment, the hydraulic pump 31 is a constant displacement pump, and the discharge amount can be changed by changing the rotation speed of the electric motor 46. The controller 23 controls the movement of the hydraulic motor 14, the rotation cylinder 9, the swing cylinder 13, and the discharge cylinder 16. Specifically, rotation control of the hydraulic motor 14 and expansion / contraction of the rotation cylinder 9, the swing cylinder 13, and the discharge cylinder 16 are performed by switching the operation of an electromagnetic valve 32 provided in the work device 30 and electrically connected to the controller 23. Is supposed to do.

  As shown in FIG. 5, the inverter 20 includes a rectifier circuit 21, an output circuit 22, and an output circuit controller 24. More specifically, as shown in FIG. 1, the inverter 20 has a unit shape and is disposed in the electrical component storage box 19. The inverter 20 has a DC input port 20a and an AC input port 20b. The inverter 20 also serves to control the output speed of the electric motor 46 by causing the output circuit controller 24 to control the output circuit 22.

  Further, the electric system 25 is provided with a relay 52, and by switching the relay 52, the DC input port 20a and the AC input port 20b are selected.

  The DC input port 20a receives power from a DC power source, is transmitted to the output circuit 22 without passing through the rectifier circuit 21, and is adjusted from DC power to AC power having a frequency suitable for driving the electric motor 46. Is output. DC power from the electric double layer capacitor 44 is input to the DC input port 20a, but power from the DC power generation device 42 is directly input to the DC input port 20a without going through the electric double layer capacitor 44. Also good.

  As shown in FIG. 1, the electric system 25 includes an outlet 50 for introducing AC power from an external power source 51 that is a commercial three-phase AC power source. The outlet 50 can be connected to the inverter 20 from the AC input port 20b. The outlet 50 is covered with an openable / closable lid member 50a. When the lid member 50a is opened and closed, the outlet 50 is detected by an open / close detection switch 50b formed of, for example, a mechanical limit switch. The AC external power supply 51 is normally provided with a breaker 51b so that the rated current is 100V to 200V and the maximum current is limited by contract ampere. The power input from the AC input port 20b with the plug 51a inserted into the outlet 50 is once rectified in the rectifier circuit 21 in the inverter 20, and then the output circuit 22 drives the electric motor 46. It is adjusted to AC power with an appropriate frequency and output.

  In the normal setting control, the inverter 20 increases the number of rotations of the electric motor 46 when the amount of oil necessary for the work device increases. For this reason, the inverter 20 is configured to perform upper limit setting control for restricting the load of the electric motor 46 from increasing and the current from the external power source 51 exceeding the upper limit value. Specifically, when the lid member 50a is opened, upper limit setting control is performed to control the current that the inverter 20 supplies to the electric motor 46 so that the current from the external power source 51 is less than or equal to the upper limit value. When the is closed, the normal setting control without performing the upper limit setting control is performed. The upper limit value is set in accordance with, for example, a specified value of the breaker 51b of the external power source 51.

  In addition, the electric system 25 displays an upper limit release switch 53 that switches from the upper limit setting control to the normal setting control with the lid member 50a opened, and an alarm device that indicates that the upper limit release switch 53 has been activated. The upper limit release lamp 54 is provided. The upper limit release switch 53 is formed of a push button switch, for example, and is manually operated. This alarm device may be an alarm buzzer or a display on a monitor (not shown).

-Electric system operation-
Next, the operation of the electric system 25 in the present embodiment will be described.

  First, in the electric garbage collection vehicle 1 of the present embodiment, the electric double layer capacitor 44 is charged with the current generated by the DC power generation device 42 while the vehicle is running through the AVR 42b.

  During the on-site garbage loading operation, the charged DC power from the electric double layer capacitor 44 is sent to the inverter 20 to drive the electric motor 46 and the hydraulic pump 31. By doing so, the work can be performed while the vehicle engine 8 is stopped. By doing so, noise is reduced and exhaust gas is not discharged during operation, as compared with a garbage truck using a PTO.

  However, when the electric double layer capacitor 44 is not sufficiently charged or when loading work is performed for a long time, the loading work is performed using the external power source 51.

  In that case, as shown in FIG. 6, first, in S01, the operator inserts the plug 51a into the outlet 50. At this time, when the lid member 50a is opened, the open / close detection switch 50b reacts to switch the relay 52, and the current supply from the electric double layer capacitor 44 stops.

  Next, in step S02, the inverter 20 detects that the lid member 50a is opened, and the current consumption upper limit setting is turned ON. That is, when the consumption current on the external power supply side becomes 45 A or more, for example, a setting is made to reduce the rotational speed of the electric motor 46.

  Next, in step S03, it is confirmed whether the upper limit of the external power source 51 is 75 A or more. The current value of 75 A is merely an example, and may be arbitrarily set according to the output of the electric motor 46 and the like. If the upper limit current value of the external power source 51 (specified value of the breaker 51b) is 75A or more, there is no possibility that the breaker 51b will drop due to the load of the electric motor 46, so the operator presses the upper limit release switch 53 in step S04. Switch to ON.

  Then, in step S05, the inverter 20 sets the upper limit set value to 75A and turns on the upper limit release lamp 54. Thereby, the worker can recognize that it is in the upper limit release state.

  In step S03, when the upper limit of external power supply 51 is smaller than 75A, the current consumption upper limit setting control set in step S02 is maintained.

  Next, in step S06, the operator operates the operation unit, the signal is transmitted to the controller 23, and the garbage loading device 10 starts loading garbage.

  Next, in step S07, the inverter 20 calculates the current consumption of the external power source 51 from the output power output from the output circuit 22. At this time, the current from the external power source 51 may be directly detected by a current sensor or the like.

  Next, in step S08, the inverter detects whether the consumption current is equal to or higher than the upper limit setting current of 45A. At this time, even if the specified value of the breaker 51b is 45A, the breaker 51b does not drop immediately. When the current consumption is 45A or more of the upper limit set current, if the operation is continued as it is, the breaker 51b will drop, so in step S09, the inverter 20 reduces the output power and appropriately reduces the rotation speed of the electric motor 46.

  When the current consumption is smaller than the upper limit setting current of 45 A, the loading operation is maintained as it is.

  Next, in step S10, the operator operates the operation unit to finish the loading operation.

  Next, in step S <b> 11, the operator removes the plug 51 a from the outlet 50. Then, the lid member 50a is closed. Then, the open / close detection switch 50b reacts.

  Next, in step S12, upon receiving the signal from the open / close detection switch 50b, the inverter 20 releases the upper limit setting, turns off the upper limit release lamp 54, and the process ends.

  As described above, in the present embodiment, in the upper limit setting control, the inverter 20 reduces the output of the electric motor 46 so that the current consumption of the electric motor 46 does not exceed the upper limit value, so that the breaker 51b of the external power source 51 does not fall. The electric motor 46 can be continuously driven.

  Further, when the external power source 51 is not used, the electric motor 46 is driven using the electric power of the electric double layer capacitor 44 or the DC power generation device 42. Therefore, there is no need to consider the upper limit value due to the contract amperage. When the lid member 50a is opened to take in power from the external power source 51 that needs to be taken into consideration, it is automatically switched to the upper limit setting control to prevent the breaker 51b from dropping unexpectedly and interrupting the work. Can do.

  Further, when using the external power supply 51 having a large contract amperage, the upper limit value becomes large, so that it is not necessary to perform the upper limit setting control, and the upper limit release switch 53 can be operated to switch to the normal setting control. In that case, the upper limit canceling lamp 54 can recognize that the upper limit is being canceled and can perform work efficiently.

  Therefore, according to the electric system according to the present embodiment, the electric motor 46 can be appropriately driven so that the breaker 51b on the external power source 51 side does not fall.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the above-described embodiment, the case where the electric system 25 is provided in the electric garbage collection vehicle 1 has been described. However, the present invention is applicable to other electric vehicles such as a mixer vehicle, an aerial work vehicle, and a granular material transport vehicle. Can be applied.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

DESCRIPTION OF SYMBOLS 1 Electric dust collection vehicle 2 Vehicle 2a Driver's cab 2b Body frame 3 Dust storage box 4 Back opening 5 Input box support pin 6 Dust input box 7 Input port 8 Vehicle engine 8a Fan belt 9 Rotating cylinder 10 Dust loading device 11 Push Plate 13 Oscillating cylinder 14 Hydraulic motor 15 Rotating plate 16 Discharge cylinder 17 Discharge plate 18 Discharge device 19 Electrical component storage box 20 Inverter 20a DC input port 20b AC input port 21 Rectifier circuit 22 Output circuit 23 Controller 24 Controller for output circuit 25 Electric System 30 Working device 31 Hydraulic pump 32 Solenoid valve 42 DC generator 42a Generator 42b AVR
44 Electric double layer capacitor
46 Electric motor (electric drive)
50 Outlet 50a Lid member 51 External power supply 51a Plug 51b Breaker 52 Relay 53 Upper limit release switch 54 Upper limit release lamp (alarm device)
55 Garbage

Claims (5)

In an electric system including a power storage device and an electric drive device,
An outlet for introducing power from an external power source;
An inverter for supplying a current introduced into the outlet and a current from the power storage device to the electric drive device;
The inverter is configured to perform upper limit setting control for restricting the load from the electric drive device from increasing and the current from the external power source exceeding an upper limit value ,
When using the power storage device, when the external power source is used, upper limit setting control is performed to suppress the current supplied to the electric drive device by the inverter so that the current from the external power source is less than or equal to the upper limit value. An electric system configured to perform normal setting control without performing the upper limit setting control . In an electric system including a power storage device and an electric drive device,
An outlet for introducing power from an external power source;
An inverter for supplying a current introduced into the outlet and a current from the power storage device to the electric drive device;
The inverter is configured to perform upper limit setting control for restricting the load from the electric drive device from increasing and the current from the external power source exceeding an upper limit value,
The outlet is covered with a lid member,
When the lid member is opened, upper limit setting control is performed to suppress the current supplied to the electric drive device so that the current from the external power source becomes equal to or lower than the upper limit value, and the lid member is closed. In some cases, the electric system is configured to perform normal setting control without performing the upper limit setting control. The electric system according to claim 2,
An upper limit release switch that switches from the upper limit setting control to the normal setting control with the lid member opened, and an alarm device that indicates that the upper limit release switch is in operation. Electric system. In the electric system according to any one of claims 1 to 3,
The electric drive device includes an electric motor that drives a hydraulic pump that supplies hydraulic pressure to a plurality of work devices,
In the upper limit setting control, the inverter suppresses the rotation speed of the electric motor so that the current from the external power source is set to be equal to or lower than an upper limit value. In the electric garbage collection vehicle provided with the electric system according to claim 4,
The electric dust collecting vehicle, wherein the upper limit value is set according to a specified value of a breaker of the external power source.

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