JP2011188575A - Module for supplying power during power failure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric actuator which can be used as an ordinary electric actuator and as an electric actuator having an emergency shutoff function without changing configuration. <P>SOLUTION: A relay connector 10 is provided in an electric actuator 100. When a power supply module 300 for power failure is connected, a first drive output M1 generated by a motor drive circuit 4 is relayed to the module 300. A motor power supply switching circuit 19 is provided in the module 300. When an alternating power supply AC does not fail, the first drive output M1 (drive output generated by the alternating power supply AC) transmitted from the electric actuator 100 is selected. When the alternating power supply AC fails, the second drive output M2 (drive output generated by a power supply EC during power failure ) generated by the motor drive circuit 18 is selected. The selected drive power is transmitted to an AC motor 5 of the electric actuator 100, via the relay connector 10. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power supply module during a power failure that is used by being connected to an electric actuator that performs flow rate control by adjusting the opening of a control target such as a valve or a damper.

  Conventionally, in air conditioning equipment, the control target is a valve provided in the cold / hot water pipe, a damper that adjusts the volume of conditioned air supplied to the air conditioning area through the duct, and the opening degree of the control target is adjusted. An electric actuator is used for this purpose.

  This type of normal electric actuator is provided with an AC motor as a drive motor inside the electric actuator because AC power is supplied as an operating power source, and in response to a control command from an air conditioning controller, the control target is actually opened. A control operation is performed so that the degree matches the set opening. In such an electric actuator that operates with an AC power supply, when a power failure occurs in the supplied AC power supply, the controlled object whose opening is controlled remains at the operation opening immediately before the power failure, and appropriate opening control is no longer possible. It becomes impossible to do.

  Therefore, when the AC power supplied to the electric actuator has a power failure, it is forced to operate at a predetermined opening (for example, fully closed) until the AC power returns to the energized state again. An electric actuator that maintains the above has been proposed and already exists. Hereinafter, this type of electric actuator is referred to as an electric actuator with an emergency cutoff function.

  At present, two types of electric actuators with an emergency shut-off function have been proposed. One type is called a spring return type, and the other type is called a secondary power supply type.

[Spring return type electric actuator]
The spring return type electric actuator is equipped with a return spring that is urged so as to maintain a fully closed state with respect to the drive shaft of the electric actuator, and resists the urging force of the return spring when AC power is supplied. Then, the opening degree of the control object is adjusted by driving the drive motor, and when a power failure occurs, the opening degree of the control object is forcibly set to a predetermined opening degree by the urging force of the return spring (for example, see Patent Document 1). ).

[Secondary power drive type electric actuator]
On the other hand, the secondary power source drive type electric actuator uses a DC motor as the drive motor for the electric actuator, and additionally includes a secondary power source (DC power source) composed of a secondary battery, an electric double layer capacitor, etc. When power is supplied, this AC power is converted to DC and the DC motor is driven to adjust the opening of the controlled object. In the event of a power failure, the secondary power is used as the operating power. A DC motor is driven by a power source (DC power supply) to forcibly set the opening degree to be controlled to a predetermined opening degree (see, for example, Patent Document 2).

  By the way, comparing these two types of electric actuators with an emergency shut-off function, the spring return type electric actuator overcomes the resistance because the urging force of the return spring acts as a resistance against normal motor drive. Therefore, a motor having a large torque must be used as a drive motor, which has the disadvantages of increasing the size, weight, and cost of the electric actuator.

  On the other hand, the secondary power source drive type electric actuator does not have the disadvantages of the spring return type, and in recent years, the capacity of secondary batteries and electric double layer capacitors as secondary power sources has been improved. , Is becoming advantageous.

JP 2002-174269 A JP 2008-89109 A

  However, in the conventional electric actuator, the structure of an electric actuator having an emergency shut-off function and an electric actuator not having an emergency shut-off function (ordinary electric actuator) are greatly different, so two types of electric actuators need to be manufactured. was there.

  In addition, if a user who used a normal electric actuator later wants to have an emergency shut-off function for the electric actuator, the existing electric actuator will be significantly modified or an electric actuator with an emergency shut-off function. Had to be purchased separately and replaced with an existing electric actuator, which required cost, modification and replacement.

  For example, when an ordinary electric actuator is remodeled to a secondary power source drive type electric actuator, an AC motor is used for the drive motor of the ordinary electric actuator. Change, and the addition of a module with an emergency shutdown function is required. In addition, the replaced parts must be discarded. As described above, when a normal electric actuator is remodeled to a secondary power source drive type electric actuator, the cost and labor required for the remodeling become excessive.

  The present invention has been made to solve such a problem, and the object of the present invention is to use an electric actuator having the same configuration as a normal electric actuator or an electric actuator having an emergency shut-off function. An object of the present invention is to provide a power supply module during a power failure.

  In order to achieve such an object, the present invention is detected by an AC motor, an actual opening degree detecting means for detecting an actual opening degree of a controlled object driven by the AC motor, and the actual opening degree detecting means. Control means for generating a control output for causing the actual opening to coincide with the set opening, and a first drive output for receiving a control output generated by the control means and generating a first drive output as a drive output to the AC motor At the time of a power failure that is detachably connected to an electric actuator having a generation unit and an AC power supply input unit that is an energy source of the first drive output generated by the first drive output generation unit via a cable AC power supply relay means for relaying AC power to the electric actuator, power failure detection means for detecting AC power failure to the electric actuator, and the control target reach a predetermined opening A second drive output generation means for generating a drive output as a second drive output, a power supply means at the time of power failure as an energy source of the second drive output generated by the second drive output generation means, and an electric actuator The first drive output generated by the first drive output means and the second drive output generated by the second drive output generation means are input, and the power failure detection means detects the AC power failure. If not, the first drive output is selected as the drive output to the AC motor. If the power failure detection means detects a power failure of the AC power supply, the second drive output is selected as the drive output to the AC motor. Drive output selection means is provided.

  When the power supply module at the time of power failure of the present invention is not connected to the electric actuator, the electric actuator transmits the first drive output generated in the electric actuator to the AC motor, and sets the actual opening of the control target. Control is performed so as to match each time. Thereby, the electric actuator functions as a normal electric actuator.

  When the power 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. In the power supply module at the time of power failure, when the power failure of the AC power supply to the electric actuator is not detected, the first drive output sent from the electric actuator is selected as the drive output to the AC motor, and the AC power supply to the electric actuator is selected. When the power failure is detected, the second drive output generated by the power supply module at the time of the power failure is selected as the drive output to the AC motor.

  As a result, when a power failure has not occurred, the first drive output (drive output generated in the electric actuator) selected by the power supply module at the time of the power failure is sent to the AC motor, and the actual opening of the control target is set and opened. Control is performed so as to match each time. When a power failure occurs, the second drive output selected by the power module during power failure (drive output generated in the power module during power failure) is sent to the AC motor, and the actual opening of the control target is set to a predetermined opening ( For example, control is performed so as to reach the fully closed state. Thereby, the electric actuator functions as an electric actuator having an emergency cutoff function.

According to the power supply module at the time of power failure of the present invention, when not connected to the electric actuator, the electric actuator is caused to function as a normal electric actuator, and when connected to the electric actuator, the electric actuator is subjected to an emergency cutoff function. The electric actuator with the same configuration can be used as a normal electric actuator or an electric actuator with an emergency shut-off function depending on whether or not the power supply module is connected during a power failure It becomes possible to do so.

It is a block diagram which shows the principal part of the electric actuator before connecting the power supply module at the time of a power failure which concerns on this invention. It is an external view of this electric actuator. It is a figure which shows the state which connected one Embodiment (Embodiment 1) of the power supply module at the time of a power failure which concerns on this electric actuator to this electric actuator. It is a block diagram of the principal part at the time of connecting a power supply module at the time of a power failure to this electric actuator. It is a figure which shows the structure inside the power supply module at the time of a power failure. It is a figure which shows the example (Embodiment 2) which sent the actual opening degree detection signal from the electric actuator to the power supply module at the time of a power failure.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a power module during a power failure according to the present invention will be described in detail with reference to the drawings.

[Electric actuator]
FIG. 1 is a block diagram showing a main part of an electric actuator before connecting a power supply module during a power failure according to the present invention. In the figure, 100 is an electric actuator, and 200 is a valve (control target) whose opening degree is controlled by this electric actuator 100.

  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 (AC motor) 5, and a gear train 6 that transmits the driving force of the AC motor 5. An output shaft 7 that adjusts the opening degree of the valve 200 as an output end of the gear train 6, a potentiometer 8 that detects the rotation angle position of the output shaft 7 as the actual opening θpv of the valve 200, and a predetermined rotation angle of the output shaft 7 A limit switch 9 and relay connectors 10 and 11 that detect the arrival of the position as arrival of a predetermined opening of the valve 200 (in this example, arrival of the valve 200 to the fully closed position) are provided.

  In the electric actuator 100, an AC power supply AC is input to the terminal block 1 as an operation power supply from the outside. The AC power supply AC is supplied to the control board 3 after being used as a required internal power supply in the power supply circuit 2. The terminal block 1 receives a set opening θsp as a control command from an air conditioning controller (not shown), and the input set opening θsp is sent to the control board 3 as a set opening signal S1. . Further, the actual opening θpv of the valve 200 from the potentiometer 8 is given to the control board 3 as the actual opening detection signal S2, and a signal indicating the arrival of the valve 200 from the limit switch 9 to the predetermined opening is opened. This is given as the degree arrival signal S3.

  The control board 3 receives the set opening signal S1 from the air conditioning controller and the actual opening detection signal S2 from the potentiometer 8, and generates a control output S4 that matches the actual opening θpv of the valve 200 with the set opening θsp. The generated control output S4 is sent 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 is divided into a male connector 10A and a female connector 10B. By connecting the connector passages L1 and L2 with a jumper wire J in the female connector 10B, motor driving is performed. The first drive output M 1 from the circuit 4 is sent to the AC motor 5 through the relay connector 10.

  The relay connector 11 has a split structure of a male connector 11A and a female connector 11B, and only by connecting the female connector 11B to the male connector 11A, a predetermined opening degree from the limit switch 9 is reached. The signal S3 is terminated in the connector passage L3.

  FIG. 2 shows an external view of the electric actuator 100. In the figure, 12 is a power line for drawing the AC power source AC into the electric actuator 100, and 13 is a signal line for drawing 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, L2), thereby setting and opening the actual opening θpv of the valve 200. Control is performed to match the degree θsp. Thereby, this electric actuator 100 functions as a normal electric actuator.

[When used as an electric actuator with emergency shutdown function]
When it is desired to use the electric actuator 100 as an electric actuator having an emergency shut-off function, a power supply module 300 during a power failure is connected between the electric actuator 100 and the power line 12 via a cable 14 as shown in FIG.

  That is, the power line 12 is disconnected from the electric actuator 100, the power line 12 is connected to the input side of the power supply module 300 during a power failure, and the cable 14 connects between the output side of the power supply module 300 during power failure and the input side of the electric actuator 100. Connecting.

  FIG. 4 shows a block diagram of the main part when the power supply module 300 is connected to the electric actuator 100 during a power failure. The power failure module 300 is an embodiment (Embodiment 1) of the power failure module according to the present invention, and includes a terminal block 15, a power failure detection circuit 16, a power failure power supply unit 17, and a motor drive circuit 18. And a motor power supply switching circuit 19.

  When connecting the power supply module 300 at the time of power failure to the electric actuator 100, in the electric actuator 100, the female connector 10B (FIG. 1) of the relay connector 10 is removed, and the motor power switching circuit of the power module 300 at the time of power failure is connected to the male connector 10A. The female connector 10B ′ led out from 19 is coupled.

  Further, the female connector 11B (FIG. 1) of the relay connector 11 is removed, and the female connector 11B 'derived from the motor drive circuit 18 of the power supply module 300 during a power failure is coupled to the male connector 11A.

  In the power supply module 300 during a power failure, the power line 12 is connected to the terminal block 15, and the AC power AC relayed by the terminal block 15 is sent to the terminal block 1 of the electric actuator 100 through the power supply module 300 during the power failure. To do.

  In this case, the cable 14 that connects the power supply module 300 and the electric actuator 100 at the time of a power failure is derived from the lead-out line for the female connector 10B ′ from the motor power switching circuit 19 and the lead-out from the motor drive circuit 18 to the female connector 11B ′. A line and a relay line of the AC power supply AC relayed by the terminal block 15 are configured.

  In this example, when the power supply module 300 is connected to the electric actuator 100 at the time of a power failure, the female connector 10B and the female connector 11B are removed, but using the female connector 10B and the female connector 11B, A similar connection may be obtained.

  In the power supply module 300 during a power failure, the power failure detection circuit 16 monitors the AC power supply AC relayed by the terminal block 15 and outputs a power failure detection presence / absence signal S5 that informs whether or not a power failure has occurred in the AC power supply AC to the electric actuator 100. Output.

  The power supply unit 17 at the time of a power failure includes an AC / DC power conversion unit 17-1 that converts the branch input into a DC power supply using the AC power supply AC relayed by the terminal block 15 as a branch input, and an AC / DC power supply conversion unit 17-1. Charged circuit 17-2 that operates by receiving the converted DC power supply, a capacitor (electric double layer capacitor or lithium ion capacitor) 17-3 charged by this charging circuit 17-2, and stored in capacitor 17-3 A DC power supply voltage adjusting unit 17-4 that generates a DC power supply that is voltage-adjusted (both boosted and stepped down as is) and outputs the same as a power supply EC during a power failure.

  The motor drive circuit 18 uses the power supply EC during power failure output from the power supply unit 17 during power failure as an energy source, and based on a predetermined opening arrival signal S3 sent through the relay connector 11 (connector path L3) in the electric actuator 100. , The drive output M2 (second drive output) to the AC motor 5 is generated. In this case, the motor drive circuit 18 uses the power supply during power failure (DC power source with adjusted voltage) EC from the power supply unit 17 during power failure as an output obtained by alternating current until the occurrence of the predetermined opening arrival signal S3 is confirmed. Drive output M2 is generated.

  The motor power supply switching circuit 19 includes a first drive output M1 generated by the motor drive circuit 4 in the electric actuator 100 sent through the relay connector 10 (connector path L1), and a motor drive circuit in the power supply module 300 during a power failure. When the power failure detection circuit 16 has not detected a power failure of the AC power source AC based on the power failure detection presence / absence signal S5 from the power failure detection circuit 16, the AC motor 5 is input. When the power failure detection circuit 16 detects a power failure of the AC power supply AC, the second drive output M2 is selected as the drive output to the AC motor 5. The drive output from the selected motor power supply switching circuit 19 is sent to the AC motor 5 in the electric actuator 100 through the relay connector 10 (connector path L2).

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

[When there is no power outage]
The motor power supply switching circuit 19 in the power supply module 300 at the time of a power failure is connected from the electric actuator 100 to the relay connector 10 based on the power failure detection presence / absence signal S5 from the power failure detection circuit 16 when the AC power supply AC to the electric actuator 100 has not failed. The drive output M1 (the first drive output M1 generated by the motor drive circuit 4) sent through (connector path L1) is selected as the drive output to the AC motor 5.

  The first drive output M1 from the selected motor power supply switching circuit 19 is sent to the AC motor 5 in the electric actuator 100 through the relay connector 10 (connector path L2). Thus, when the AC power supply AC to the electric actuator 100 is not interrupted, the actual opening θpv of the valve 200 is changed to the set opening θsp by the first drive output M1 generated using the AC power supply AC as an energy source. Control is performed to match.

[When a power failure occurs]
The motor power supply switching circuit 19 in the power supply module 300 during power failure is generated in the power module 300 during power failure based on the power failure detection presence / absence signal S5 from the power failure detection circuit 16 when a power failure occurs in the AC power supply AC to the electric actuator 100. The drive output M2 (second drive output M2 generated by the motor drive circuit 18) is selected as the drive output to the AC motor 5.

  The second drive output M2 from the selected motor power supply switching circuit 19 is sent to the AC motor 5 in the electric actuator 100 through the relay connector 10 (connector path L2). Thereby, when a power failure occurs in the AC power supply AC to the electric actuator 100, the actual opening θpv of the valve 200 is set to a predetermined opening (in this example, by the second drive output M2 using the power supply EC at the time of the power failure as an energy source). , Fully closed state) is controlled. In this case, when the actual opening θpv of the valve 200 reaches the predetermined opening and the predetermined opening arrival signal S3 is input to the motor drive circuit 18, the motor drive circuit 18 stops the output of the second drive output M2. To do.

[When power failure is restored]
In the power supply module 300 at the time of a power failure, even when a power failure occurs in the AC power supply AC, the power failure detection circuit 16 continues to monitor the AC power supply AC. When the power failure of the AC power supply AC is restored, the power failure detection circuit 16 notifies the motor power supply switching circuit 19 by a power failure detection presence / absence signal S5.

  When the power failure detection circuit 16 informs that the AC power supply AC has been restored, the motor power supply switching circuit 19 sends a drive output M1 (motor drive) sent from the electric actuator 100 through the relay connector 10 (connector path L1). The first drive output M1) generated by the circuit 4 is selected as the drive output to the AC motor 5.

  The first drive output M1 from the selected motor power supply switching circuit 19 is sent to the AC motor 5 in the electric actuator 100 through the relay connector 10 (connector path L2). As a result, when the power failure of the AC power supply AC is restored, the actual opening θpv of the valve 200 is changed to the set opening θsp by the first drive output M1 generated using the AC power supply AC as an energy source, as before the power failure. Control is performed to match.

  Thus, when the power supply module 300 at the time of power failure is connected to the electric actuator 100, the electric actuator 100 that has been functioning as a normal electric actuator until then starts to function as an electric actuator having an emergency cutoff function.

  In this electric actuator 100, the terminal block 1 corresponds to the input portion of the AC power source referred to in the present invention, the control board 3 corresponds to the control means, the motor drive circuit 4 corresponds to the first drive output generation means, and the AC The motor 5 corresponds to an AC motor, and the potentiometer 8 corresponds to an actual opening degree detection means. In the power supply module 300 during a power failure, the terminal block 15 corresponds to the AC power supply relay means in the present invention, the power failure detection circuit 16 corresponds to the power failure detection means, and the power supply unit 17 during the power failure corresponds to the power supply means during the power failure. The motor drive circuit 18 corresponds to second drive output generation means, and the motor power supply switching circuit 19 corresponds to 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 not connected to the electric actuator 100, the electric actuator 100 is functioned as a normal electric actuator and connected to the electric actuator 100. In this case, the electric actuator 100 can be made to function as an electric actuator having an emergency cutoff function.

  In this case, connection work of the power line 12 and the cable 13 is necessary, but the electric actuator 100 does not need to be modified, and the electric actuator 100 having the same configuration is connected to the normal electric motor depending on whether or not the power supply module 300 is connected during a power failure. It can be used as an actuator or an electric actuator having an emergency cutoff function.

  This eliminates the need for the manufacturer to manufacture two types of electric actuators. In addition, it is possible to easily change from a normal electric actuator to an electric actuator having an emergency cutoff function at the site.

  Further, in this example, since the electric actuator 100 is a secondary power source drive type, the drive motor has a higher capacity and a higher strength of the gear is not required because there is no urging force of the return spring compared to the spring return type. It becomes. Further, it is not necessary to change the layout of the existing wiring, and the power line 12 and the signal line 13 can be used as they are. Moreover, since the power supply module 300 at the time of a power failure can be installed at an arbitrary position, the electric actuator 100 can be changed to an electric actuator having an emergency cutoff function even in a narrow place.

[Embodiment 2]
In the first embodiment, when the power supply module 300 during a power failure is connected to the electric actuator 100, the predetermined opening arrival signal S3 is sent from the electric actuator 100 to the power supply module 300 during a power failure. Instead, the actual opening detection signal S2 may be sent. FIG. 6 shows an example where the actual opening detection signal S2 is sent from the electric actuator 100 to the power supply module 300 during a power failure as the second embodiment.

  In the second embodiment, the actual opening degree detection signal S2 is sent from the electric actuator 100 to the power supply module 300 during a 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 set to a predetermined opening (in this example, based on the actual opening θpv sent from the electric actuator 100 as the actual opening detection signal S2. It is determined whether or not the fully closed state has been reached, and the determination result is sent to the motor drive circuit 18 as a limit position determination signal S6 instead of the predetermined opening arrival signal S3. Therefore, the set opening degree at the time of power failure can be arbitrarily determined.

  In the above-described example, the relay connector 10 is divided into the male connector 10A and the female connector 10B, and the connector passages L1 and L2 are connected by the jumper wire J in the female connector 10B. When the motor drive circuit 4 and the AC motor 5 are directly connected via a connector and the power supply module 300 is connected during a power failure, the connector that connects the motor drive circuit 4 and the AC motor 5 is removed, and the connection between the connectors The wiring as shown in FIG. 4 may be realized by connecting a separately prepared wiring member. In this case, the means including the connector connecting the motor driving circuit 4 and the AC motor 5 and the wiring member connected between the connectors corresponds to the relay means in the present invention.

  In the above-described example, the power supply unit 17 during a power failure is configured using a capacitor (an electric double layer capacitor or a lithium ion capacitor) in the power module 300 during a power failure, but a secondary battery such as a lithium battery is used. Or a primary battery may be used. As described above, various devices such as a primary power source, a secondary battery, and an electric double layer capacitor can be used as means for generating the power supply EC at the time of power failure, and can be appropriately selected and used.

  The power supply module for power failure according to the present invention can be used in various fields such as air conditioning equipment as a power module for power failure connected to an electric actuator that performs flow control by adjusting the opening of a control target such as a valve or a damper. Is possible.

  DESCRIPTION OF SYMBOLS 1 ... Terminal block, 2 ... Power supply circuit, 3 ... Control board, 4 ... Motor drive circuit, 5 ... AC motor (AC motor), 6 ... Gear train, 7 ... Output shaft, 8 ... Potentiometer, 9 ... Limit switch, 10 11 ... Relay connector, 10A, 11A ... Male connector, 10B, 10B ', 11B, 11B' ... Female connector, L1, L2, L3 ... Connector path, J ... Jumper wire, 12 ... Power line, 13 ... Signal wire , 14 ... Cable, 15 ... Terminal block, 16 ... Power failure detection circuit, 17 ... Power source during power failure, 17-1 ... AC / DC power source conversion unit, 17-2 ... Charging circuit, 17-3 ... Capacitor (electric double layer Capacitor, lithium ion capacitor), 17-4 ... DC power supply voltage adjustment unit, 18 ... motor drive circuit, 19 ... motor power supply switching circuit, 20 ... limit position determination circuit, 100 ... electric actuator 200 ... valves, 300 ... power failure when the power supply module.

Claims (5)

An AC motor, an actual opening detecting means for detecting an actual opening of a control object driven by the AC motor, and a control output for matching the actual opening detected by the actual opening detecting means with the set opening. Control means for generating, first drive output generating 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 the first drive output generating means A power supply module during a power failure that is detachably connected via a cable to an electric actuator provided with an input portion of an AC power source that is an energy source of a first drive output generated by
AC power supply relay means for relaying AC power to the electric actuator;
A power failure detection means for detecting a power failure of the AC power supply to the electric actuator;
Second drive output generation means for generating a drive output for causing the control target to reach a predetermined opening as a second drive output;
A power supply means at the time of power failure that is an energy source of the second drive output generated by the second drive output generation means;
The power failure detection means receives 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. When the power failure of the AC power source is not detected, the first drive output is selected as the drive output to the AC motor, and when the power failure detection means detects the power failure of the AC power source, the AC motor A power output module during a power failure comprising: drive output selection means for selecting the second drive output as a drive output to the power supply. In the power supply module at the time of power failure described in claim 1,
The power supply means at the time of power failure outputs a DC power supply as a power source at the time of power failure,
The power supply module during power failure, wherein the second drive output generation means generates the second drive output as an output obtained by converting the power during power failure output from the power supply means during power failure into an alternating current. In the power supply module at the time of power failure described in claim 1,
The power supply means at the time of power failure is
AC / DC power conversion means for converting the branch input into a DC power supply using the AC power supply relayed by the AC power supply relay means as a branch input;
Power storage means for storing a charge obtained from a DC power source converted by the AC / DC power source conversion means;
A power supply module for power failure, comprising: a DC power supply voltage adjusting means for generating a DC power supply whose voltage is adjusted from the electric charge stored in the power storage means and outputting it as a power supply during a power failure. In the power supply module at the time of power failure described in claim 1,
The second drive output generation means includes
The power supply module during a power failure, wherein the second drive output is generated based on notification of whether or not the control object notified from the electric actuator has reached the predetermined opening degree. In the power supply module at the time of power failure described in claim 1,
A predetermined opening arrival determining means for determining whether or not the controlled object has reached the predetermined opening based on the actual opening of the controlled object notified from the electric actuator;
The second drive output generation means includes
The power supply module during a power failure, wherein the second drive output is generated based on a determination result as to whether or not the controlled object has reached the predetermined opening degree by the predetermined opening degree arrival determining means.

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