JP5786310B2 - Power control device - Google Patents

Description

  The present invention relates to a power control apparatus that performs power control of a drive motor used in a production facility or the like.

Conventionally, as a technology related to energy saving, the power generated when the drive motor is decelerated (or idling) as shown in FIG. 5 (a) is directly supplied to the primary power supply of the device via the servo amplifier (or inverter) and the regenerative converter. Regenerative technology is used. Further, a technique is used in which the power consumption value of the drive motor as shown in FIG. 5B is obtained from a servo amplifier (or an inverter) and the power consumption state is monitored.
In such a technique, when the regenerative power is generated, the power is only returned or the power consumption state is monitored, and thus power control cannot be performed according to the power consumption state.

As a technique for performing power control by monitoring a power consumption state, a technique disclosed in Patent Document 1 is known.
The power line communication device disclosed in Patent Document 1 is connected to an electrical device, measures the power supply amount of the electrical device, communicates with each other between the power line communication devices, and calculates the sum of the power supply amounts. Then, based on the calculation result, it is determined whether or not the power can be suppressed, and the power control is performed (or the power control is released stepwise according to the total amount of power supply).

The power line communication device is configured to perform power control when the total amount of power supply exceeds a preset power value. Therefore, when the power line communication device is used for production facilities, the rotation state (for example, the stopped state) of the drive motor cannot be monitored autonomously in the entire production facility.
In other words, since it is not possible to determine how and at which timing the electric power is consumed, power consumption is wasted such as supplying power during a time period when the rotation of the drive motor is stopped. That is, optimal power control could not be performed.

JP 2008-263398 A

  The present invention has been made in view of the above situation, and provides a power control apparatus capable of always performing optimal power control on a drive motor.

According to a first aspect of the present invention, it is used in a production facility including a drive motor that rotates in a predetermined rotation cycle and an actuator that performs a series of operations together with the drive motor in a predetermined operation cycle, and controls electric power of the drive motor A power control apparatus, wherein the actuator is capable of acquiring an operation cycle of the actuator, a rotation cycle of the drive motor and a power consumption value, and is connected to the monitor, and is generated when the drive motor is idling. A power storage means capable of storing electric power; and a switching means connected to the monitoring means, for switching the flow direction of the electric power of the drive motor and the power storage means, and for switching on and off the power supply. , The operation cycle of the actuator, the rotation cycle of the drive motor, and the power consumption value of the drive motor, Then, the rotational state of the drive motor is analyzed, and when the actuator operates and the drive motor does not rotate, it is determined that the drive motor is stopped, and the switching means is controlled. Then, by turning off the power supply of the drive motor, the power supply to the drive motor is stopped, the actuator is operated, and the power consumption value of the drive motor is smaller than when the drive motor is driven. In this case, it is determined that the drive motor is idling, and the switching unit is controlled to switch the flow direction of the power so that the regenerative power flows from the drive motor to the power storage unit, and The regenerative power is stored in the power storage means by turning on the power supply of the drive motor and the power storage means.

  According to a second aspect of the present invention, the monitoring unit is connected to a predetermined power generation device, can control power generation timing of the power generation device, is in a state where power consumption is concentrated, and an operation cycle of the production facility If it is determined that there is little influence on equipment control based on the above, power generation by the power generation device is performed.

  Since the present invention grasps how power is consumed by the drive motor and performs power control of the drive motor, there is an effect that optimum power control can always be performed on the drive motor.

Explanatory drawing which shows the whole structure of an electric power control apparatus. Explanatory drawing which shows the state which analyzes automatically the rotation state of a drive motor. Explanatory drawing which shows the state which analyzes automatically the electric power concentration state at the time of production equipment starting. Explanatory drawing which shows the plant total control system using an electric power control apparatus. Explanatory drawing which shows the technique regarding the conventional energy saving. (A) Explanatory drawing which shows the technique which regenerates the electric power of a drive motor. (B) Explanatory drawing which shows the technique which monitors a power consumption condition.

  Below, power control device 10 which is one embodiment of a power control device concerning the present invention is explained with reference to drawings.

  As shown in FIG. 1, the power control apparatus 10 is used in the production facility 20 and performs power control and the like of the drive motor 23.

  First, the production facility 20 will be described. The production facility 20 includes a facility controller 21, a servo amplifier 22, a drive motor 23, an actuator 24, and the like.

  The facility controller 21 has a communication function capable of communicating with the servo amplifier 22 and the actuator 24, and is configured to be able to communicate with the servo amplifier 22 and the actuator 24 through the power line. The equipment controller 21 transmits predetermined signals to the servo amplifier 22 and the actuator 24, and controls the operation timing of the drive motor 23 and the actuator 24 (see reference signs A11 and A12 shown in FIG. 1).

The servo amplifier 22 is connected to the factory power supply and the drive motor 23 via a power line, and is supplied with power from the factory power supply (see symbol S shown in FIG. 1) via a first switch 14 described later. The servo amplifier 22 operates the drive motor 23 when receiving a predetermined signal from the equipment controller 21. That is, the rotation of the drive motor 23 is started or stopped.
Note that the drive motor 23 may be operated by an inverter instead of the servo amplifier 22.

  The drive motor 23 rotates at a predetermined rotation cycle and drives, for example, an elevating device for raising and lowering the workpiece. In this case, the drive motor 23 is driven when the workpiece is lifted, and the drive motor 23 is idled when the workpiece is lowered. When the drive motor 23 idles, regenerative power is generated in the drive motor 23.

  The servo amplifier 22 has an existing regenerative function that returns the regenerative power of the drive motor 23 along the flow direction.

  The actuator 24 is, for example, a fluid cylinder or a pump motor. When the actuator 24 receives a predetermined signal from the equipment controller 21, the actuator 24 performs an operation according to the signal. As such an operation, for example, when the actuator 24 is a fluid cylinder, a fluid is introduced into the cylinder and connected to a workpiece.

In the production facility 20 configured as described above, the drive motor 23 and the actuator 24 are operated at a predetermined timing to perform a predetermined process. Specifically, it is a series of operations such as driving the drive motor 23 to lift the workpiece after the actuator 24 is operated and connected to the workpiece.
Such a series of operations is performed by the equipment controller 21 transmitting a predetermined signal to the drive motor 23, the actuator 24, and the like. That is, the equipment controller 21 controls the operation of the production equipment 20.

  Next, the power control apparatus 10 will be described. The power control apparatus 10 includes a smart meter 11, a charge / discharge converter 12, a power storage device 13, a first switch 14, and a second switch 15.

The smart meter 11 serving as a monitoring unit has a communication function capable of communicating with the equipment controller 21 and the servo amplifier 22 and the like, and has an arithmetic function for performing automatic analysis of a rotation state of a drive motor 23 described later.
The smart meter 11 is communicably connected to the equipment controller 21 via a power line, and acquires the rotation cycle C12 of the drive motor 23 and the operation cycle C11 of the actuator 24 from the equipment controller 21 (reference S11 shown in FIG. 1).
Further, the smart meter 11 is configured to be communicable with the servo amplifier 22 via a power line, and acquires the power consumption value V12 of the drive motor 23 from the servo amplifier 22 (see reference numeral S12 shown in FIG. 1).

The charge / discharge converter 12 communicates with the smart meter 11 and the equipment controller 21 via a device (for example, the excessive power generation protection device 34 shown in FIG. 4) for protecting the power line and the power storage device 13 that is the power storage means. Configured to be possible.
The charge / discharge converter 12 transmits the power storage state of the power storage device 13 to the smart meter 11 (see symbol S13 shown in FIG. 1).
The charge / discharge converter 12 is connected to the power storage device 13 via a power line, and stores or discharges the power storage device 13 when receiving a predetermined signal from the facility controller 21.

  The power storage device 13 is, for example, an existing secondary battery that can repeatedly use electric power.

Charging / discharging of the electrical storage device 13 is performed by transmitting a predetermined signal in the order of the smart meter 11 → the equipment controller 21 → the charge / discharge converter 12 → the electrical storage device 13. That is, the power storage device 13 is connected to the smart meter 11 via the equipment controller 21 and the charge / discharge converter 12.
The facility controller 21 controls the first switch 14 and the second switch 15 when charging / discharging the power storage device 13.

  The first switch 14 is disposed between the servo amplifier 22 and the factory power supply (see S in FIG. 1), and is configured to receive a signal from the equipment controller 21. When the first switch 14 receives a signal from the equipment controller 21, the first switch 14 switches the power flow direction of the drive motor 23 and turns on / off the power supply (see symbol A <b> 13 shown in FIG. 1).

  The second switch 15 is disposed between the charge / discharge converter 12 and the servo amplifier 22 (more specifically, on the charge / discharge converter 12 side than the first switch 14), and is configured to receive a signal from the equipment controller 21. Is done. When receiving a signal from the equipment controller 21, the second switch 15 switches the power flow direction of the power storage device 13 and turns on / off the power supply (see symbol A14 shown in FIG. 1).

When the regenerative power of the drive motor 23 is stored in the power storage device 13, the facility controller 21 controls the switches 14 and 15 to switch the power flow direction so that power flows from the drive motor 23 to the power storage device 13. . Further, the power supply of the drive motor 23 and the power storage device 13 is turned on.
When the facility controller 21 discharges the power of the power storage device 13 to the drive motor 23, the facility controller 21 switches the switches 14 and 15 to switch the power flow direction so that the power flows from the power storage device 13 to the drive motor 23. Further, the power supply of the drive motor 23 and the power storage device 13 is turned on.
That is, electric power flows bidirectionally between the drive motor 23 and the power storage device 13. The switches 14 and 15 are connected to the smart meter 11 via the equipment controller 21.

  As described above, the switches 14 and 15 function as switching means for switching the power flow direction of the drive motor 23 and the power storage device 13 and turning on / off the power supply.

  As shown in FIGS. 1 and 2, the smart meter 11 includes the operation cycle C11 of the actuator 24 and the rotation cycle C12 of the drive motor 23 acquired from the equipment controller 21 and the power consumption value of the drive motor 23 acquired from the servo amplifier 22. Based on V12, the rotational state of the drive motor 23 is automatically analyzed.

  The rotation state of the drive motor 23 of the present embodiment indicates that the drive motor 23 is in a stopped state, in a driving state, or in an idle state.

In the following description, for convenience of explanation, it is assumed that the actuator 24 is a fluid cylinder connected to a workpiece, and the drive motor 23 drives a lifting device for lifting the workpiece.
In addition, the smart meter 11 connects the actuator 24 to the workpiece, the lifting device lifts the workpiece, the lifting device lowers the workpiece, and the drive motor 23 in a series of operations of releasing the connection state between the actuator 24 and the workpiece. It is assumed that the rotational state of is automatically analyzed.

  In this case, the operation cycle C11 of the actuator 24 introduces fluid into the fluid cylinder at a certain point (reference sign C11 on the left side of FIG. 2, extraction end → entry end), and extracts the fluid in the fluid cylinder after a predetermined time has passed ( The symbol C11 on the right side of FIG.

  Further, the rotation cycle C12 of the drive motor 23 is such that the rotation of the drive motor 23 starts after a predetermined time has elapsed from a certain point in time.

  The power consumption value V12 of the drive motor 23 is such that the power consumption value continuously increases or decreases from the start of rotation of the drive motor 23.

  The smart meter 11 determines that the drive motor 23 is in a stopped state during the time zone in which the actuator 24 operates and the drive motor 23 does not rotate. In other words, since it is a time zone in which the actuator 24 is connected to the workpiece, it is determined that it is a time zone in which the power supply of the drive motor 23 may be stopped.

When the smart meter 11 determines that the drive motor 23 is in a stopped state, the smart meter 11 transmits a signal to the equipment controller 21 to disconnect the power supply from the drive motor 23 (see reference numeral S14 shown in FIG. 1). .
At this time, the equipment controller 21 controls the first switch 14 to turn off the power supply of the drive motor 23. That is, power is not supplied to the drive motor 23.

  Then, the smart meter 11 controls the switches 14 and 15 at the timing when the operation of the actuator 24 is finished and the drive motor 23 starts rotating, and starts supplying power to the drive motor 23.

  Thereby, since the power supply of the drive motor 23 can be stopped when the drive motor 23 is stopped, wasteful power consumption can be suppressed.

  In the time zone when the drive motor 23 starts rotating and the power consumption value V12 of the drive motor 23 increases, it is determined that the drive motor 23 is in a driving state. That is, it is determined that it is a time zone in which the workpiece is being lifted.

  When the smart meter 11 determines that the drive motor 23 is in a driving state, the smart meter 11 does not transmit a signal to the equipment controller 21. That is, the power control state is maintained as it is.

  In the time zone in which the actuator 24 operates and the power consumption value V12 of the drive motor 23 is smaller than when the drive motor 23 is driven, the smart meter 11 determines that the drive motor 23 is idling. That is, it is determined that it is a time period during which the work is lowered and the connection state between the actuator 24 and the work is released.

  When the smart meter 11 determines that the drive motor 23 is idling, the smart meter 11 checks the power storage state of the power storage device 13 received from the charge / discharge converter 12.

The smart meter 11 signals to the equipment controller 21 to store the regenerative power of the drive motor 23 in the power storage device 13 when the power storage device 13 is in a state where the regenerative power of the drive motor 23 can be stored (when not fully charged). Send.
At this time, the equipment controller 21 controls the switches 14 and 15 to switch the flow direction of the power so that the power flows from the drive motor 23 to the power storage device 13. Further, the power supply of the drive motor 23 and the power storage device 13 is turned on. Then, a signal is transmitted to the charge / discharge converter 12 so that the power storage device 13 stores the regenerative power of the drive motor 23.
As a result, the regenerative power of the drive motor 23 generated during the idling of the drive motor 23 is stored in the power storage device 13.

  If the power storage device 13 is in a state in which the regenerative power of the drive motor 23 cannot be stored (when fully charged), the first switch 14 is controlled to transfer the drive motor 23 from the servo amplifier 22 to the factory power supply. Return the regenerative power.

Thus, the power control apparatus 10 can grasp how the power is consumed in the production facility 20 by automatically analyzing the rotation state of the drive motor 23 by the smart meter 11.
In addition, by actively controlling the direction of power flow according to the rotation state of the drive motor 23, wasteful power consumption can be suppressed and regenerative power of the drive motor 23 can be stored in the power storage device 13.
That is, since the power control of the drive motor 23 is performed by grasping how the power is consumed by the drive motor 23, the optimal power control can be always performed on the drive motor 23.

  In addition, when the rotation state of the drive motor 23 can be determined only by the rotation cycle C12 of the drive motor 23 and the power consumption value V12, the operation cycle C11 of the actuator 24 does not necessarily need to be considered.

The power stored in the power storage device 13 is preferably consumed in a time zone where power consumption is concentrated (hereinafter, referred to as “power concentration time”), such as at the start of a cycle or operation of a factory.
In the following, with reference to FIG. 1 and FIG. 3, a flow when the smart meter 11 automatically analyzes when power is concentrated and consumes the power stored in the power storage device 13 when the power is concentrated will be described.

  In the following, for convenience of explanation, it is assumed that the power concentration time at the start of a certain process (hereinafter referred to as “facility startup”) is automatically analyzed, but the automatic analysis is similarly performed during factory operation. Is possible.

The smart meter 11 includes a rotation cycle C21 of the drive motor 23 at the time of starting the equipment from the equipment controller 21 and a device that operates at the time of starting up the equipment (for example, a cooling device that cools the cutting tool, hereinafter referred to as “dedicated drive device”) The operation cycle C22 is acquired.
Further, the power consumption values V21 and V22 of the drive motor 23 and the dedicated drive device are acquired from the servo amplifier 22 or the like.

As the rotation cycle C21 of the drive motor 23 at the time of equipment activation, there is a rotation cycle C21 in which the drive motor 23 is driven after a certain time has elapsed since the equipment activation as shown in FIG.
Further, as the operation cycle C22 of the dedicated drive device at the time of starting the equipment, there is an operation cycle C22 in which the operation of the dedicated drive device is started (turned on) after a certain time has elapsed since the equipment start-up as shown in FIG. .

  Further, the power consumption values V21 and V22 of the drive motor 23 and the dedicated drive device are such that the power consumption value continuously increases and decreases, similarly to the power consumption value V12 shown in FIG.

  The smart meter 11 determines that the time period in which the power consumption values V21 and V22 of the drive motor 23 and the dedicated drive device increase at the same timing is based on the time when the equipment is activated, when the power is concentrated.

  The smart meter 11 determines that the power is concentrated, and when the power storage device 13 is in a state where it can sufficiently supply power to the drive motor 23 (for example, when fully charged), the power storage device 13. A signal for performing the discharge is transmitted to the equipment controller 21.

That is, the facility controller 21 starts the discharging of the power storage device 13 by controlling the switches 14 and 15 so that power flows from the power storage device 13 to the servo amplifier 22.
Thereby, since the power control apparatus 10 can monitor the power consumption state at the time of equipment start-up by the smart meter 11 in real time, it can grasp the time zone when the power consumption is concentrated at the time of equipment start-up. Therefore, the power storage device 13 can be discharged when the power is concentrated, and the power consumption of the production facility 20 can be suppressed.

  Further, when it is determined that the power consumption is not concentrated, such as when the drive motor 23 and the dedicated drive device are stopped or when the drive motor 23 is idling, or when the power storage amount of the power storage device 13 is small, The power storage device 13 is not discharged.

In the power control device 10, in addition to the power control of the drive motor 23 and the power storage device 13, it is possible to actively generate power by controlling the operation of the power generation device that generates power in the production facility 20.
In the following description, as shown in FIG. 4, the production facility 20 is described as including a thermal energy recovery converter 31, a power generation control converter 32, a power generation motor 33, an excessive power generation protection device 34, and an output control inverter 35. .

The thermal energy recovery converter 31 as a power generation device is configured to be able to communicate with the smart meter 11 and the equipment controller 21 via the power line network 36. The thermal energy recovery converter 31 transmits the power generation amount to the smart meter 11. The thermal energy recovery converter 31 converts the exhaust heat 31a in the equipment control panel into electric power when receiving a predetermined signal from the equipment controller 21.
Further, the thermal energy recovery converter 31 is configured to be able to supply power to the power storage device 13 and the output control inverter 35 via the power line network 36.

The power line network 36 interconnects the smart meter 11 and the equipment controller 21, the thermal energy recovery converter 31, the power generation control converter 32, and the like with a plurality of power lines. The power line network 36 is provided with a plurality of switches and the like for turning on and off the power supply such as the thermal energy recovery converter 31 and the power generation control converter 32. Each switch is controlled by the equipment controller 21.
Therefore, when the thermal energy recovery converter 31 performs power conversion of the exhaust heat 31a, the facility controller 21 corresponds to the thermal energy recovery converter 31 so that power flows from the thermal energy recovery converter 31 to the power storage device 13 and the like. The switch is controlled.

The power generation control converter 32 as a power generation device is connected to the power generation motor 33 via a power line, and transmits the power generation amount of the power generation motor 33 to the smart meter 11. When the power generation control converter 32 receives a predetermined signal from the equipment controller 21, the power generation control converter 32 receives the rotational force of the power generation motor 33 that idles without load and generates power.
The power generation control converter 32 is configured to be able to supply the generated power to the power storage device 13 and the output control inverter 35 through the power line network 36.

  The power generation motor 33 as a power generation device is disposed, for example, in the vicinity of a motor used in the production facility 20, and is connected to the motor and idles without load.

When the power generation control converter 32 generates power with the power generation motor 33, the switch corresponding to the power generation control converter 32 is controlled by the equipment controller 21 as in the case of the thermal energy recovery converter 31. Turn on the power supply.
Such power generation by the thermal energy recovery converter 31 and the power generation control converter 32 is performed by the smart meter 11 transmitting a predetermined signal to the equipment controller 21. That is, the smart meter 11 can control the power generation timing of the thermal energy recovery converter 31 and the power generation control converter 32.

The excessive power generation protection device 34 monitors the power storage state of the power storage device 13 and protects the power storage device 13 from overcharging. The excessive power generation protection device 34 is configured to be able to communicate with the smart meter 11 via the power line network 36.
The excessive power generation protection device 34 transmits a signal reporting that the power storage device 13 is fully charged to the smart meter 11 when the power storage device 13 is fully charged. The smart meter 11 transmits a signal to the facility controller 21 to stop the storage of the power storage device 13, and the facility controller 21 stops the storage of the power storage device 13.

  The output control inverter 35 is connected to another production facility 20, an external power transmission line 3, or the like via a power line or the like, and the power remaining in the production facility 20 exceeds the storage capacity (for example, when the storage device 13 is fully charged The power generated at 20) is returned to the primary side of the production facility 20 and the transmission line 3.

  In such a production facility 20, the smart meter 11 automatically analyzes a time zone that is at the time of power concentration and has little influence on facility control.

  More specifically, the smart meter 11 acquires the operation cycle and the power consumption value of each device (such as the actuator 24) of the production facility 20. Then, the time of power concentration is determined based on the power consumption value, and the time zone having little influence on the facility control is determined based on the operation cycle of each device.

For example, the smart meter 11 can be used when the power is concentrated unless complicated equipment control is performed such as a large number of devices operating in a short period of time when the power consumption is greater than a preset power value. In addition, it is determined that it is a time zone with little influence on equipment control.
Then, the smart meter 11 transmits a signal for generating power to the thermal energy recovery converter 31 and the power generation motor 33 to the equipment controller 21 in the determined time zone. The generated electric power is supplied to the drive motor 23 or the like (or stored in the power storage device 13).
The above-mentioned “less influence on facility control” means that a malfunction such as malfunction occurs in the facility control by transmitting a signal for generating power to the thermal energy recovery converter 31 and the generator motor 33 to the facility controller 21. It is not to do.

  According to this, it is possible to grasp the power consumption status of the entire production facility 20 by independently monitoring the movement of the entire production facility 20 by the smart meter 11. Therefore, since the power can be generated at an optimal timing according to the power consumption status of the production facility 20 and the control status of each device, energy saving of the entire production facility 20 can be positively controlled.

  Further, the power control apparatus 10 can collectively control power in the factory by connecting to the smart server 2 provided in the factory having the plurality of production facilities 20.

The smart server 2 is configured to be able to communicate with a smart meter 11 that performs power control of each production facility 20 via a network 4 such as the Internet and an intranet.
Such a smart server 2 is, for example, a commercially available personal computer, and is configured to be able to execute arithmetic processing using a predetermined dedicated program or the like.

  The smart meter 11 transmits power control information to the smart server 2. Such power control information includes, for example, the rotational state of the drive motor 23, the analysis result when the power is concentrated, the power generation status in the production facility 20, the amount of power stored in the power storage device 13, and the like.

  The smart server 2 analyzes such power control information, and controls power consumption in a factory where a plurality of production facilities 20 are installed based on the analysis result.

More specifically, the smart server 2 determines, for example, the production facility 20 that can supply the power of the power storage device 13 and the production facility 20 that can generate power when the power of the predetermined production facility 20 is concentrated.
When power is concentrated in the predetermined production facility 20, a signal is transmitted to each smart meter 11 and the flow direction of power is controlled so that power is supplied from the determined production facility 20 to the predetermined production facility 20. To do.
According to this, power consumption in the factory can be optimally controlled.

In addition, as in the case of the smart server 2, the plant total control system 1 configured to be able to communicate with the smart server 2 of each factory via the network 4 automatically analyzes the power control information of each factory. Power control across factories is also possible.
According to this, since power consumption can be optimally controlled in the whole factory, a greater energy saving effect can be produced.

10 Power Control Device 11 Smart Meter (Monitoring means)
13 Power storage equipment (power storage means)
14 First switch (switching means)
15 Second switch (switching means)
23 Drive motor C12 Rotation cycle V12 Power consumption

Claims (2)

A power control apparatus that is used in a production facility including a drive motor that rotates in a predetermined rotation cycle and an actuator that performs a series of operations with the drive motor in a predetermined operation cycle, and that controls the power of the drive motor. ,
Monitoring means capable of acquiring an operation cycle of the actuator, a rotation cycle of the drive motor and a power consumption value;
Power storage means connected to the monitoring means and capable of storing regenerative power generated when the drive motor idles;
A switching unit connected to the monitoring unit, switching a power flow direction of the drive motor and the power storage unit, and switching on and off the power supply;
Comprising
The monitoring means includes
Based on the operation cycle of the actuator, the rotation cycle of the drive motor and the power consumption value of the drive motor, the rotation state of the drive motor is analyzed,
When the actuator operates and the drive motor does not rotate, it is determined that the drive motor is stopped, and the power supply to the drive motor is turned off by controlling the switching means. Then, the power supply to the drive motor is stopped,
When the actuator operates and the power consumption value of the drive motor is smaller than when the drive motor is driven, it is determined that the drive motor is idling, and the switching means is controlled. And switching the flow direction of the power so that the regenerative power flows from the drive motor to the power storage means, and turning on the power supply to the drive motor and the power storage means, thereby supplying the regenerative power to the power storage means. To store electricity,
Power control device. The monitoring means includes
It is connected to a predetermined power generator and can control the power generation timing of the power generator,
When it is determined that the power consumption is concentrated and the equipment control is less affected based on the operation cycle of the production equipment, power is generated by the power generator.
The power control apparatus according to claim 1.

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