KR101178340B1 - Power module in case of power outage - Google Patents

Abstract

[Problem] The electric actuator of the same structure can be used as a normal electric actuator and also as an electric actuator which has an emergency interruption function.
[Remedy] When the relay connector 10 is provided in the electric actuator 100, and the power supply module 300 is connected during power failure, the first drive output M1 generated by the motor driving circuit 4 is interrupted. Relay to the power module 300. The motor power switching circuit 19 is provided in the power supply module 300 at the time of power failure, and when the AC power source AC is not interrupted, the first drive output M1 sent from the electric actuator 100 (AC power supply AC). ) And the second drive output M2 generated by the motor drive circuit 18 (drive generated by the power supply EC at the time of power failure) when the AC power supply AC is out of power. Output) to be sent to the AC motor 5 of the electric actuator 100 via the relay connector 10.

Description

Power module in case of power failure {POWER MODULE IN CASE OF POWER OUTAGE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply module at the time of power failure, which is connected to an electric actuator that performs flow control by adjusting an opening degree of a control object such as a valve or a damper.

Background Art Conventionally, in air conditioning facilities, valves installed in the cold and hot water pipes, dampers, etc., which reduce or decrease the amount of airflow of air to be supplied to the air conditioning area through the duct, are controlled. Actuators are used.

In this type of normal electric actuator, since AC power is supplied as an operating power source, an AC motor is provided as a driving motor inside the electric actuator, and the actual opening degree of the control object is adjusted in accordance with a control command from the air conditioning controller. A control operation is performed in accordance with the set opening degree. In the electric actuator operated by such an AC power supply, when a power failure occurs in the supplied AC power supply, the controlled object to be controlled for the opening degree remains in the operation opening just before the power failure, so that appropriate opening degree control cannot be performed.

Therefore, when the AC power supplied to the electric actuator becomes a power failure, the AC power is forcibly operated at a predetermined opening degree (for example, totally closed), until the AC power returns to the energized state again. An electric actuator of the type which maintains the opening degree of is also proposed and already exists. Hereinafter, this type of electric actuator is called an emergency shut-off function part electric actuator.

At present, two types of electric actuators with emergency interrupting function have been specifically proposed. One type is called a spring return type and the other type is a secondary power source driving type.

[Spring Return Type Electric Actuator]

The spring return type electric actuator is equipped with a return spring pressurized to maintain the closed state with respect to the drive shaft of the electric actuator. When AC power is supplied, the spring return type electric actuator resists the pressing force of the return spring and drives the driving motor to open the control object. When the power failure occurs, the opening degree of the control object is forcibly set to a predetermined opening degree by the pressing force of the return spring (see Patent Document 1, for example).

[Secondary Power Drive Type Electric Actuator]

On the other hand, the secondary power drive type electric actuator uses a drive motor of the electric actuator as a direct current motor, and is equipped with a secondary power source (direct current power source) composed of a secondary battery or an electric double layer capacitor, and supplied with an AC power source. If it is, the AC power is converted into DC and the DC motor is driven to adjust the opening degree of the control object.In case of power failure, the secondary power is used as the operating power, and the DC motor is operated by the secondary power (DC power). By driving, the opening degree of a control object is forcibly made into a predetermined opening degree (for example, refer patent document 2).

By the way, when comparing these two types of emergency shutoff electric actuators, the spring return type electric actuator acts as a resistance against the normal driving of the return spring. Since a large torque motor must be used, it has the disadvantage of increasing the size, weight, and cost of the electric actuator.

On the other hand, the secondary power supply type electric actuator does not have the same disadvantages as the spring return type, and in recent years, there is also an improvement in the capacity of a secondary battery or an electric double layer capacitor, which is a secondary power source, and continues to be advantageous.

[Patent Document 1] Japanese Patent Application Laid-Open No. 2002-174269 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-89109

However, in the conventional electric actuators, the electric actuators having the emergency shutoff function and the electric actuators (normal electric actuators) having no emergency shutoff function had a large difference in structure, and therefore, it was necessary to manufacture two types of electric actuators. .

If a user who is using a normal electric actuator wants to provide an emergency shut-off function to the electric actuator later on, the existing electric actuator can be greatly modified or a separate electric actuator with an emergency shut-off function can be purchased separately. In order to replace the electric actuator, the cost and the time and effort of retrofitting and replacing were incurred.

For example, when converting a normal electric actuator into a secondary power drive type electric actuator, since an AC motor is used for the drive motor of a normal electric actuator, this AC motor is replaced with the DC motor, a control board Needs to be changed, the addition of a module with the emergency shutdown function, etc. In addition, the replaced parts need to be discarded. As described above, when the ordinary electric actuator is converted into a secondary power drive type electric actuator, the cost, time, and effort required for the conversion are excessive.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a power supply module in case of a power failure, which makes it possible to use an electric actuator of the same configuration as an electric actuator having an emergency interruption function as a normal electric actuator. It is.

In order to achieve the above object, the present invention relates to an alternating-current detection means for detecting an alternating current of an AC motor, a controlled object driven by the alternating-current motor, and a set-up opening degree detected by the actual degree of detection. Control means for generating a control output that matches the control circuit; first drive output generation means for receiving the control output generated by the control means and generating a first drive output as a drive output to the AC motor; and generating the first drive output. AC power relay means for relaying AC power to the electric actuator in a power failure module which is detachably connected via a cable to an electric actuator having an input of an AC power source that is an energy source of a first drive output generated by the means; Second driving means for detecting a power failure of an AC power supply to an electric actuator, and a drive output for reaching a predetermined opening degree to be controlled; Second drive output generation means for generating power, second power output means for generating an energy source of the second drive output generated by the second drive output generation means, and first drive output means for generating the first drive output means sent from the electric actuator. When the first drive output and the second drive output generated by the second drive output generating means are input, and the blackout detecting means does not detect the blackout of the AC power source, the first drive output is selected as the drive output to the AC motor. When the blackout detecting means detects a blackout of the AC power supply, a drive output selecting means for selecting the second drive output as the drive output to the AC motor is provided.

When the power supply module at the time of power failure of the present invention is not connected to the electric actuator, in the electric actuator, the first drive output generated in the electric actuator is sent to the AC motor, and the control is performed to match the actual degree of control to the set opening degree. All. As a result, the electric actuator functions as a normal electric actuator.

When the power supply module at the time of power failure of the present invention is connected to the electric actuator, the first drive output generated in the electric actuator is sent to the power module at the time of power failure. When the power supply module does not detect the blackout of the AC power supply to the electric actuator during power failure, the first drive output from the electric actuator is selected as the drive output to the AC motor, and the blackout of the AC power supply to the electric actuator is detected. In one case, the second drive output generated by the power supply module in case of power failure is selected as the drive output to the AC motor.

As a result, when no power failure occurs, the first drive output (drive output generated in the electric actuator) selected by the power supply module at the time of power failure is sent to the AC motor to control the actual degree of control to match the set opening degree. Is done. In the event of a power failure, a second drive output (drive output generated in the power module during power failure) selected by the power supply module during power failure is sent to the AC motor to change the actual degree of control to a predetermined opening degree (e.g., total closure). Control to reach is done. As a result, the electric actuator functions as an electric actuator having an emergency interruption function.

According to the power supply module at the time of power failure of the present invention, when the electric actuator is not connected to the electric actuator, the electric actuator functions as a normal electric actuator, and when it is connected to the electric actuator, the electric actuator as an electric actuator having an emergency shut-off function. It becomes possible to make it function, and it becomes possible to use the electric actuator of the same structure as an electric actuator which has an emergency interruption function as a normal electric actuator by connecting a power supply module at the time of a power failure.

1 is a block diagram showing the main part of the electric actuator before connecting the power supply module at the time of power failure according to the present invention.
2 is an external view of the electric actuator.
Fig. 3 is a diagram showing a state in which an embodiment (Embodiment 1) of the power supply module during power failure according to the present invention is connected to this electric actuator.
4 is a block diagram of an essential part in the case where the power supply module is connected to the electric actuator at the time of power failure.
5 is a view showing the internal structure of the power supply module during a power failure.
Fig. 6 is a diagram showing an example (Embodiment 2) in which the actual degree detection signal is sent from the electric actuator to the power supply module during power failure.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the electric actuator concerning this invention is described in detail based on drawing.

[Electric Actuator]

1 is a block diagram showing the main part of the electric actuator before connecting the power supply module at the time of power failure according to the present invention. In FIG. 1, 100 is an electric actuator, 200 is a valve (control object) by which the opening degree is controlled by this electric actuator 100. FIG.

The electric actuator 100 includes a terminal block 1, a power supply circuit 2, a control board 3, a motor drive circuit 4, an AC motor 5, and an AC motor 5 The gear train 6 which transmits the driving force of the gear, the output shaft 7 which adjusts the opening degree of the valve 200 as an output end of this gear train 6, and the rotation angle position of this output shaft 7 are the valves 200. The arrival of the potentiometer 8 and the output shaft 7 to the predetermined rotational angle position detected as the opening degree θpv of the valve 200 is reached to the predetermined opening degree (in this example, the valve is fully closed). The limit switch 9 to detect as a position reached) and the relay connectors 10 and 11 are provided.

In the electric actuator 100, the AC power source AC is input to the terminal block 1 as an operating power source from the outside, and this AC power source AC becomes the required internal power source in the power supply circuit 2, and then the controller board. Given in (3). Moreover, the setting opening degree (theta sp) is input to the terminal block 1 as a control command from an air conditioning controller (not shown), and this input setting opening degree (theta sp) is input to the control board 3 as the setting opening signal S1. Is sent. In addition, the control board 3 is given the actual degree θpv of the valve 200 from the potentiometer 8 as the actual degree detection signal S2, and the predetermined value of the valve 200 from the limit switch 9 is given. A signal indicating the arrival of the opening degree is given as a predetermined opening arrival signal S3.

The control board 3 receives the set opening signal S1 from the air conditioning controller and the opening degree detection signal S2 from the potentiometer 8 to set the opening degree θpv of the valve 200 to the set opening degree θsp. Generates a control output (S4) to match with and transmits the generated control output (S4) to the motor drive circuit (4). The motor drive circuit 4 receives the control output S4 from the control board 3 and generates a drive output M1 (first drive output) to the AC motor 5.

The relay connector 10 is provided between the motor drive circuit 4 and the AC motor 5 and relays the first drive output M1 from the motor drive circuit 4 to the AC motor 5. In this example, the relay connector 10 has a split structure between the male-side connector 10A and the female-side connector 10B, and a jumper wire (L) between the connector passages L1 and L2 in the female-side connector 10B. J), the first drive output M1 from the motor drive circuit 4 is sent to the AC motor 5 via the relay connector 10.

The relay connector 11 has a split structure between the male-side connector 11A and the female-side connector 11B. The relay connector 11 is only connected to the male-side connector 11A by the female side connector 11B. The predetermined opening arrival signal S3 is terminated at the connector passage L3.

The external view of this electric actuator 100 is shown in FIG. 2 to 12 are power lines that draw the AC power source AC into the electric actuator 100, and 13 are signal lines that draw the set opening degree θsp into the electric actuator 100.

In this electric actuator 100, the first drive output M1 generated by the motor drive circuit 4 is sent to the AC motor 5 through the relay connector 10 (connector passages L1 and L2). Control is performed to match the seal degree θpv of the valve 200 to the set opening degree θsp. As a result, the electric actuator 100 functions as a normal electric actuator.

[When used as an electric actuator with an emergency interruption function]

In the case where the electric actuator 100 is to be used as an electric actuator having an emergency shutoff function, as shown in FIG. 3, the power supply at the time of power failure through the cable 14 between the electric actuator 100 and the power line 12. The module 300 is connected.

That is, the power line 12 is removed from the electric actuator 100, and the power line 12 is connected to the input side of the power supply module 300 at the time of power failure, and the output side of the power supply module 300 at the time of power failure is transferred to the output side. The cable 14 is connected between the input side of the actuator 100.

4 shows a block diagram of the main part in the case where the power supply module 300 is connected to the electric actuator 100 at the time of power failure. The power supply module 300 at the time of power failure is one embodiment (Embodiment 1) of the module at the time of power failure according to the present invention, and includes a terminal block 15, a power failure detection circuit 16, a power failure unit 17 at the time of power failure, and a motor driving circuit. The furnace 18 and the motor power switching circuit 19 are provided.

When the power supply module 300 is connected to the electric actuator 100 at the time of power failure, the female connector 10B (Fig. 1) of the relay connector 10 is detached from the electric actuator 100, and the male connector 10A is removed. ) Is coupled to the female-side connector (10B ') derived from the motor power switching circuit 19 of the power supply module 300 at the time of power failure.

In addition, the female connector 11B (FIG. 1) of the relay connector 11 is removed, and the female connector 11 derived from the motor drive circuit 18 of the power supply module 300 at the time of power failure to the male connector 11A. Combine (11B ').

The power line 12 is connected to the terminal block 15 from the power supply module 300 at the time of power failure, and AC power relayed by the terminal block 15 is transferred through the interior of the power supply module 300 at the time of power failure. To the terminal block (1) of the actuator (100).

In this case, the cable 14 for connecting the power supply module 300 and the electric actuator 100 at the time of power failure includes the lead line of the female connector 10B 'from the motor power switching circuit 19 and the motor driving circuit 18. ) And the relay line of the AC power source AC relayed by the terminal block 15.

In this example, when the power supply module 300 is connected to the electric actuator 100 at the time of power failure, the female connector 10B or the female connector 11B is removed, but the female connector 10B or the female connector is removed. The same connection may be obtained using the side connector 11B.

In a power failure, the power failure detection circuit 16 monitors the AC power AC relayed by the terminal block 15 and determines whether a power failure occurs in the AC power supply to the electric actuator 100. The notice outputs a power failure detection signal S5.

In the case of power failure, the power supply unit 17 is an AC / DC power conversion unit 17-1 for converting the branch input into a DC power source, and the AC power source AC relayed by the terminal block 15 is converted into a DC power source. A charging circuit 17-2 that operates by receiving the DC power converted by the / DC power converter 17-1, and a capacitor (electric double layer capacitor or lithium ion capacitor) charged by the charging circuit 17-2. 17-3 and a DC power supply voltage adjusting unit for generating a DC power supply (voltage boost, step-down, or the like) generated by the electric charges stored in the capacitor 17-3 and outputting the power as a power supply (EC) during a power failure. It consists of (17-4).

The motor driving circuit 18 uses the power failure EC outputted from the power supply unit 17 as a power source as an energy source, and is sent through the relay connector 11 (connector passage L3) in the electric actuator 100. The drive output M2 (second drive output) to the AC motor 5 is generated on the basis of the predetermined opening arrival signal S3 coming. In this case, the motor drive circuit 18 is an output obtained by alternating the power supply (voltage regulated DC power supply) EC from the power supply unit 17 at the time of power failure, and the occurrence of the predetermined opening arrival signal S3 is confirmed. Until the second drive output M2 is generated.

The motor power switching circuit 19 has a first drive output M1 generated by the motor drive circuit 4 in the electric actuator 100 which is sent through the relay connector 10 (connector passage L1), and at the time of power failure. The second drive output M2 generated by the motor drive circuit 18 in the power supply module 300 is input, and the power failure detection circuit (S5) is based on the presence / absence detection signal S5 from the power failure detection circuit 16. When 16 is not detecting the blackout of AC power supply AC, the 1st drive output M1 is selected as a drive output to AC motor 5, and the blackout detection circuit 16 turns on the AC power supply AC. When a power failure is detected, the second drive output M2 is selected as the drive output to the AC motor 5. The drive output from this selected motor power source switching circuit 19 is sent to the AC motor 5 in the electric actuator 100 via the relay connector 10 (connector passage L2).

5 shows the internal structure of the power supply module 300 at the time of power failure. FIG. 5B is a view of the inside of the power supply module 300 when the power failure occurs, and FIG. 5A is a view of the terminal block 15 in FIG. 5C is a view of the capacitor 17-3 side in FIG. 5B viewed from the B direction. A large number of capacitors (electric double layer capacitors or lithium ion capacitors) 17-3 are provided inside the power supply module 300 at the time of power failure in order to secure a large capacity power supply EC at the time of power failure.

[When power failure does not occur]

The motor power switching circuit 19 of the power supply module 300 at the time of power failure has a power failure detection signal from the power failure detection circuit 16 when no power failure occurs in the AC power source AC to the electric actuator 100. ), The drive output M1 (first drive output M1 generated by the motor drive circuit 4) sent from the electric actuator 100 through the relay connector 10 (connector passage L1). Is selected as the drive output to the AC motor 5.

The first drive output M1 from the selected motor power switching circuit 19 is sent to the AC motor 5 in the electric actuator 100 via the relay connector 10 (connector passage L2). As a result, when a power failure does not occur in the AC power source AC to the electric actuator 100, the valve 200 is driven by the first drive output M1 generated using the AC power source AC as an energy source. Control is performed to match the actual opening degree θpv to the set opening degree θsp.

[In case of power failure]

When a power failure occurs, the motor power switching circuit 19 of the power supply module 300 responds to the presence / absence detection signal S5 from the power failure detection circuit 16 when a power failure occurs in the AC power source AC to the electric actuator 100. On the basis of this, the drive output M2 (second drive output M2 generated by the motor drive circuit 18) generated in the power supply module 300 at the time of power failure is selected as the drive output to the AC motor 5.

The second drive output M2 from the selected motor power switching circuit 19 is sent to the AC motor 5 in the electric actuator 100 via the relay connector 10 (connector passage L2). As a result, when a power failure occurs in the AC power source AC to the electric actuator 100, the actual degree of the valve 200 is changed by the second drive output M2 that uses the power source EC as an energy source during power failure. Control to reach [theta] pv) at a predetermined opening degree (in this example, the fully closed state) is performed. In this case, when the actual opening degree θpv of the valve 200 reaches a predetermined opening degree and the predetermined opening degree arrival signal S3 is input to the motor driving circuit 18, the motor driving circuit 18 drives the second drive. The output of the output M2 is stopped.

[When power failure is restored]

The power supply module 300 at the time of power failure continues monitoring of the AC power source AC in the power failure detection circuit 16 even when a power failure occurs in the AC power source AC. When the power failure of the AC power source AC is restored, the power failure detection circuit 16 notifies the motor power switching circuit 19 of the failure by the power failure detection signal S5.

The motor power switching circuit 19 is sent from the electric actuator 100 through the relay connector 10 (connector passage L1) when it is known that the power failure of the AC power source AC has been restored from the power failure detection circuit 16. Next, the drive output M1 (first drive output M1 generated by the motor drive circuit 4) is selected as the drive output to the AC motor 5.

The first drive output M1 from the selected motor power switching circuit 19 is sent to the AC motor 5 in the electric actuator 100 via the relay connector 10 (connector passage L2). As a result, when the power failure of the AC power source AC is restored, as shown before the power failure, the seal degree of the valve 200 is changed by the first drive output M1 generated using the AC power source AC as an energy source. Control of matching [theta] pv to the set opening degree [theta] sp is performed.

In this way, when the power supply module 300 at the time of power failure is connected to the electric actuator 100, the electric actuator 100 which has functioned as a normal electric actuator until then starts to function as an electric actuator having an emergency interruption function.

In this electric actuator 100, the terminal block 1 corresponds to the input portion of the AC power supply described in the present invention, the controller board 3 corresponds to the control means, and the motor drive circuit 4 generates the first drive output generating means. The AC motor 5 corresponds to the AC motor, and the potentiometer 8 corresponds to the actual detection means. In addition, the terminal block 15 in the power supply module 300 at the time of power failure corresponds to the AC power relay means described in the present invention, the power failure detection circuit 16 corresponds to the power failure detection means, and at the time of power failure, the power supply unit 17 is out of power. Corresponding to the time power supply means, the motor drive circuit 18 corresponds to the second drive output generating means, and the motor power switch circuit 19 corresponds to the drive output selection means.

As described above, according to the power supply module 300 at the time of power failure of the present embodiment, when the electric actuator 100 is not connected to the electric actuator 100, the electric actuator 100 functions as a normal electric actuator and the electric actuator 100 When connected to the electric actuator 100, the electric actuator 100 can function as an electric actuator having an emergency interruption function.

In this case, although the work of connecting the power line 12 or the cable 14 is necessary, the modification of the electric actuator 100 is unnecessary, and the electric actuator 100 having the same configuration depends on whether or not the power module 300 is connected at the time of power failure. ) Can be used either as a normal electric actuator or as an electric actuator having an emergency shut-off function.

This eliminates the need for manufacturing two types of electric actuators on the manufacturer side. In addition, it is possible to easily change from a normal electric actuator to an electric actuator having an emergency interruption function in the field.

In this example, since the electric actuator 100 is a secondary power source driving type, as compared with the spring return type, there is no need for higher driving motor capacity and higher gear strength than the spring return type. In addition, the change of the layout of the existing wiring is unnecessary, and the power line 12 and the signal line 13 can be used as it is. In addition, since the power supply module 300 can be installed at any position during power failure, the electric actuator 100 can be changed to an electric actuator having an emergency shutoff function even in a narrow place.

[Embodiment 2]

In Embodiment 1, when the power supply module 300 at the time of power failure is connected to the electric actuator 100, the predetermined opening degree arrival signal S3 is sent from the electric actuator 100 to the power supply module 300 at the time of power failure. Instead of the opening degree arrival signal S3, the actual degree detection signal S2 may be sent. 6 shows an example in which the actual degree detection signal S2 is sent from the electric actuator 100 to the power supply module 300 at the time of power failure.

In the second embodiment, the actual degree detection signal S2 is sent from the electric actuator 100 to the power supply module 300 at the time of power failure through the relay connector 11 (connector passage L3). Then, the limit position determination circuit 20 is provided in the power supply module 300 at the time of power failure, and the valve 200 is based on the seal degree θpv transmitted from the electric actuator 100 as the seal degree detection signal S2. Determines whether or not the predetermined opening degree (in this example, the fully closed state) has been reached, and substitutes the determination result to the motor opening circuit 18 as the limit position determination signal S6 to replace the predetermined opening degree arrival signal S3. I'm sending. Therefore, the setting opening degree at the time of power failure can be arbitrarily determined.

In the above-described example, the relay connector 10 is divided into a male connector 10A and a female connector 10B, and a jumper wire is formed between the connector passages L1 and L2 in the female connector 10B. (J), but the motor drive circuit 4 and the AC motor are directly connected between the motor drive circuit 4 and the AC motor 5 through a connector when the power supply module 300 is connected at the time of power failure. The connection as shown in Fig. 4 may be realized by removing the connector connected to (5) and connecting a separately prepared wiring member between the connectors. In this case, a means including a connector connecting between the motor drive circuit 4 and the AC motor 5 and a wiring member connected between the connector corresponds to the relay means described in the present invention.

In the above-described example, the power supply unit 17 during power failure in the power supply module 300 during power failure is configured by using a capacitor (electric double layer capacitor or lithium ion capacitor), but a lithium battery or the like may use the same secondary battery. It is also possible to use a primary battery. Thus, as a means of generating the power supply EC at the time of power failure, various devices, such as a primary power supply, a secondary battery, and an electric double layer capacitor, can be used, and can select suitably and can use.

The power supply module at the time of power failure of the present invention is a power supply module at the time of power failure connected to an electric actuator that controls the flow rate by adjusting the opening degree of a control object such as a valve or a damper, and can be used in various fields such as air conditioning equipment.

One … Terminal block; Power Supply Circuit,
3…. Control board; Motor drive circuit,
5 ... AC motor, 6.. Gear Row,
7 ... 8 output shaft; Potentiometer,
9 ... Limit switch, 10, 11... Relay connector,
10A, 11A... Male-side connector, 10B, 10B ', 11B, 11B'. Female side connector,
L1, L2, L3... Connector passage, J... Jumper Wire,
12 ... Power line; Signal Line,
14. Cable, 15... Terminal Block,
16. 17, power failure detection circuit; Power supply unit in case of power failure
17-1. AC / DC power converter, 17-2. Charging Circuit,
17-3. Capacitors (electric double layer capacitors or lithium ion capacitors),
17-4. DC power supply voltage adjusting section, 18. Motor drive circuit,
19. Motor power switching circuit, 20... Limit position determination circuit,
100 ... Electric actuator, 200... valve,
300... Power module in case of power failure.

Claims (5)

AC motor, a seal degree detecting means for detecting a seal degree of a control target driven by the AC motor, and a control output for matching the seal degree detected by the seal degree detecting means with a set opening degree. Control means for generating, first drive output generation means for receiving a control output generated by the control means and generating a first drive output as a drive output to the AC motor, and a first drive output generation means for generating the first drive output means. 1. A power supply module in case of power failure, which is detachably connected to the outside of the electric actuator via a cable to an electric actuator having an input of an AC power source serving as an energy source of a drive output.
AC power relay means for relaying AC power to the electric actuator;
An electrostatic detection means for detecting an electrostatic power of an AC power supply to the electric actuator;
Second drive output generation means for generating a drive output for reaching the control object to a predetermined opening degree as a second drive output;
Power supply means at the time of power failure, which is an energy source of the second drive output generated by the second drive output generating means;
The first drive output generated by the first drive output means sent from the electric actuator and the second drive output generated by the second drive output generation means are input, and the electrostatic detection means receives the blackout of the AC power source. If it is not detected, the first drive output is selected as the drive output to the AC motor, and if the electrostatic detection means detects a power failure of the AC power supply, the second drive is used as the drive output to the AC motor. And a drive output selection means for selecting an output. The method according to claim 1,
The power supply means at the time of power failure outputs a direct current power as a power supply at the time of power failure,
And said second drive output generation means generates said second drive output as an output obtained by alternating power during power failure outputted by said power supply means during power failure. The method according to claim 1,
The power supply means at the time of power failure,
AC / DC power conversion means for converting the AC power relayed by the AC power relay means into a branch input and converting the branch input into a DC power source;
Power storage means for accumulating electric charges obtained from the direct current power source converted by said AC / DC power supply conversion means;
And a DC power supply voltage adjusting means for generating a DC power adjusted by voltage stored in the power storage means and outputting the DC power as a power supply during power failure. The method according to claim 1,
The second drive output generating means,
And a second drive output based on a notification of whether the control target notified from the electric actuator has reached the predetermined opening degree. The method according to claim 1,
A predetermined opening degree determination means for determining whether the control object has reached the predetermined opening degree based on the actual opening degree of the control object notified from the electric actuator,
The second drive output generating means,
And the second driving output is generated based on a determination result of whether the control target in the predetermined opening degree determination means reaches the predetermined opening degree.

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