JP2006352987A - Inverter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inverter, suitable for supplying a desired AC voltage to an AC motor for driving a pump in an air-conditioning system of a building, or the like. <P>SOLUTION: The system controller 20 in an air-conditioning system comprises a host controller 21 for controlling the operating state of the entire air-conditioning system, an inverter 22 for supplying a desired AC voltage, based on the detection value of the quantity of load water and the detection value of supply water pressure inputted from respective detectors (not shown) and an operation command issued from the controller 21, and an inverter 23 for supplying a desired AC voltage, based on the detection values of the outlet temperature and inlet temperature from respective detectors (not shown) and an operation command issued from the host controller 21. Thus, malfunctions due to noise can be prevented in the inverters 22 and 23 and the amount of operation of the host controller 21 can be reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an inverter device that supplies a desired AC voltage to an AC motor that drives a fluid transfer device such as a pump or a fan provided in the fluid transfer system.

  Hereinafter, a primary pump type air conditioning system such as a building will be described as a specific example of the fluid conveyance system.

  FIG. 6 shows a typical configuration example of this type of air conditioning system, where 1 is an air conditioner that processes an air conditioning load, 2 is a pump that supplies cold / hot water to the air conditioner 1, and 3 is a refrigeration that generates the cold / hot water. , 4 is a pump for supplying cooling water to the refrigerator 3, 5 is a cooling tower for generating the cooling water, 10, 20, 30 are air conditioners 1, pumps 2, refrigerator 3, pump 4, cooling tower 5 It is a system controller that controls a desired state. Further, 6 is a flow meter for measuring the load flow rate, 7 is a pressure gauge for measuring the water supply pressure, 8 is an outlet side temperature detector for measuring the outlet side temperature of the cooling water of the refrigerator 3, and 9 is for cooling the refrigerator 3. An inlet side temperature detector that measures the temperature of the inlet side of water, 12 is an inverter device that supplies a desired AC voltage to an AC motor that drives the pump 2, and 14 is a desired AC voltage that is supplied to the AC motor that drives the pump 4. This is an inverter device.

FIG. 7 shows a circuit configuration diagram of a portion related to the system controller 10 in the air conditioning system shown in FIG. 6 controlling the pump 2 and the pump 4 to a desired state, and 11 is an operation state of the entire air conditioning system. It is a host controller that performs control. The inverter device 12 converts the detected value of the cold / hot water outlet side water amount, that is, the load water amount, and the detected value of the cold / hot water inlet side pressure, ie, the water supply pressure, of the air conditioner 1 input from the flow meter 6 and the pressure gauge 7 to the host controller 11. Based on a frequency command issued from the controller 11 and an operation command from the controller 11, a desired AC voltage is supplied to an AC motor (hereinafter also simply referred to as a motor) 13 that drives the pump 2, and an inverter device Reference numeral 14 denotes a frequency command issued from the host controller 11 based on the detected value of the outlet temperature of the cooling water to the refrigerator 3 input to the refrigerator 3 from the outlet side temperature detector 8, that is, the detected value of the outlet temperature, A desired AC voltage is supplied to the motor 15 that drives the pump 4 based on the operation command.
JP 2002-98358 A.

  In the conventional system controller 10 shown in FIG. 7, noise components emitted from the components of the air conditioning system shown in FIG. 6 are easily superimposed on the signal lines from the host controller 11 to the inverter device 12 and the inverter device 14. As the noise component, noise accompanying switching of power semiconductor elements constituting the inverter device 12 and the inverter device 14 occupies a large weight.

  However, in order to prevent malfunctions of the inverter device 12 and the inverter device 14 due to the noise component superimposed on the frequency command transmitted via the signal line, a filter for removing the noise component is provided on the inverter device side. Each filter is provided, but this filter may impair the response characteristics between the input and output of each of the inverter device 12 and the inverter device 14, and a filter having a large attenuation characteristic that can sufficiently remove the noise component. It was difficult to provide each of the inverter devices.

  An object of the present invention is to provide an inverter device that solves the above problems.

The first aspect of the present invention is an inverter device for supplying a desired AC voltage to an AC motor that drives a fluid transfer device provided in a fluid transfer system.
A first filter for removing a noise component included in a detection value for detecting a state of a predetermined part of the fluid transfer system; and a state quantity different from the predetermined part of the fluid transfer system from an output value of the first filter A conversion calculation unit for deriving the noise, a second filter for removing a noise component included in a detection value of a part corresponding to the state quantity of the fluid conveyance system, an output value of the conversion calculation unit, and an output value of the second filter An addition / subtraction operation unit for obtaining a deviation from the control unit, an adjustment unit that performs an adjustment operation so that the deviation becomes zero, and the alternating current having an amplitude corresponding to the frequency at a frequency based on a frequency command value that is the adjustment operation result And an inverter unit for generating a voltage.

2nd invention is the said inverter apparatus,
A first filter that removes a noise component contained in a flow rate detection value at a predetermined portion of the fluid conveyance system; a conversion calculation unit that derives a fluid pressure value at the predetermined portion from an output value of the first filter; and the fluid conveyance A second filter for removing a noise component contained in the detected value of the fluid pressure of the system; an addition / subtraction operation unit for obtaining a deviation between the output value of the conversion operation unit and the output value of the second filter; and the deviation becomes zero. And an inverter that generates the AC voltage having an amplitude corresponding to the frequency at a frequency based on the frequency command value that is the adjustment calculation result.

3rd invention is the said inverter apparatus,
A first filter that removes a noise component contained in a detected fluid temperature value at a predetermined part of the fluid delivery system, and a first filter that removes a noise component contained in a detected fluid temperature value at another part of the fluid delivery system. Two filters, a first addition / subtraction operation unit for adding / subtracting the output value of the second filter from the output value of the first filter, a second addition / subtraction operation unit for obtaining a deviation between a predetermined set value and the addition / subtraction value, and the deviation An adjustment unit that performs an adjustment calculation so as to be zero, and an inverter unit that generates the AC voltage having an amplitude corresponding to the frequency at a frequency based on a frequency command value that is the adjustment calculation result. And

4th invention is the said inverter apparatus,
A first filter that removes a noise component included in a detection value of an outlet side fluid temperature of a heat source device or an air conditioning / ventilation device included in the fluid conveyance system; and a detection value of an inlet side fluid temperature of the heat source device or the air conditioning / ventilation device A second filter for removing the noise component included in the first filter, a first addition / subtraction operation unit for adding / subtracting the output value of the second filter from the output value of the first filter, and a first for obtaining a deviation between a predetermined set value and the addition / subtraction value. A 2-addition / subtraction operation unit; an adjustment unit that performs an adjustment operation so that the deviation becomes zero; and generates an AC voltage having an amplitude corresponding to the frequency at a frequency based on a frequency command value that is the adjustment operation result. And an inverter unit.

5th invention is the said inverter apparatus,
A filter that removes a noise component included in a detection value of a state of a predetermined part of the fluid conveyance system; an addition / subtraction operation unit that calculates a deviation between a predetermined set value and an output value of the filter; and the deviation becomes zero And an inverter that generates the AC voltage having an amplitude corresponding to the frequency at a frequency based on the frequency command value that is the adjustment calculation result.

6th invention is the said inverter apparatus,
A filter that removes a noise component included in the detected value of the outlet side fluid temperature of the heat source device or the air conditioning / ventilation device provided in the fluid conveyance system, and an addition / subtraction operation unit for obtaining a deviation between a predetermined set value and the output value of the filter And an adjustment unit that performs an adjustment calculation so that the deviation becomes zero, and an inverter unit that generates the AC voltage having an amplitude corresponding to the frequency at a frequency based on a frequency command value that is the adjustment calculation result. It is characterized by having.

7th invention is the said inverter apparatus,
A filter that removes a noise component contained in the detected value of CO ₂ or CO concentration on the outlet side or the inlet side of the air conditioning / ventilation equipment provided in the fluid conveyance system;
An addition / subtraction operation unit for obtaining a deviation between a predetermined set value and the output value of the filter;
An adjustment unit that performs an adjustment operation so that the deviation becomes zero;
An inverter device comprising: an inverter unit that generates the AC voltage having a frequency corresponding to the frequency at a frequency based on a frequency command value that is the adjustment calculation result.

  According to the inverter device of the present invention, the inverter device can be provided with a filter capable of removing noise components without impairing the response characteristics between the input and output of the inverter device, and the high-speed processing in the host controller of the inverter device. As a result, the system controller provided in the fluid conveyance system can be realized at low cost.

  FIG. 1 is a circuit configuration diagram showing a first embodiment of the present invention. In this figure, components having the same functions as those of the conventional circuit shown in FIG.

  That is, FIG. 1 shows a circuit configuration diagram of a portion related to the system controller 20 in the air conditioning system shown in FIG. 6 controlling the pump 2 and the pump 4 to a desired state, and 21 is an operation state of the entire air conditioning system. The upper controller 22 performs control of the above-described control, and 22 is an outlet-side water amount of cold / hot water of the air conditioner 1 input from the detectors of the flow meter 6 and pressure gauge 7 shown in FIG. This is an inverter device that supplies a desired AC voltage to the motor 13 that drives the pump 2 based on the detected value of the inlet side pressure, that is, the water supply pressure, and the operation command issued from the controller 21, and 23 is shown in FIG. The detected value of the outlet side temperature of the cooling water to the refrigerator 3 input from the outlet side temperature detector 8 and the inlet side temperature detector 9, ie, the outlet temperature. The detection value of the inlet side temperature or inlet temperature of the pre-said cooling water, an inverter device for supplying a desired AC voltage to the motor 15 which drives the pump 4 on the basis of operation command and emanating from the host controller 21.

  In the above embodiment, the primary pump type air conditioning system shown in FIG. 6 has been described as a specific example of the fluid transfer system. However, other types of air conditioning systems, cooling systems for heat source equipment such as plants, water supply facilities, etc. It can be applied to a variable water supply system such as a ventilation system or a ventilation system for ventilating a building.

  For example, FIG. 8 shows a cooling system for a production facility, which is a system that cools a production facility (for example, a heat load such as a generator) by passing cold water through a heat exchanger.

  In the figure, 81 is a heat exchanger that processes a heat load, 82 is a pump that supplies cold water to the heat exchanger 81, 83 is an inverter device that supplies a desired AC voltage to an AC motor that drives the pump 82, and 86 is a load. A flow meter 87 for measuring the flow rate is a pressure meter for measuring the water supply pressure.

  FIG. 9 shows a water supply facility, which is a system for controlling the discharge pressure of the pump to be a constant pressure in order to obtain the required pressure and flow rate at the end of the pipe.

  In the figure, 91 is a liquid tank serving as a water source, 92 is a pump that supplies water from the liquid tank 91 to each faucet, and 93 is an AC motor that drives the pump 92 so that the discharge pressure of the pump 92 is constant. An inverter device for supplying an alternating voltage, 96 is a flow meter for measuring the load flow rate, and 97 is a pressure gauge for measuring the water supply pressure.

  FIG. 10 shows a variable air volume air conditioning system that adjusts the air volume according to the room temperature, 101 is a room to be air-conditioned having an air supply port 101a and a return air port 101b, 102 is a cooling coil 102a, and air supply An air conditioner composed of a fan 102b and the like, 103 is an inverter device that supplies a desired AC voltage to an AC motor that drives the air supply fan 102b, and 104 is requested by the chamber 101 based on a measured value of the indoor temperature detector 108. A variable air volume device (VAV) that opens and closes a motor damper (not shown) so as to match the air volume, 105 is a return air fan, 106 is an inverter device that supplies a desired AC voltage to an AC motor that drives the return air fan 105, 107 is an air conditioner outlet temperature detector, 108 is an indoor temperature detector, 109a is an outside air motor damper for taking in outside air, 109 b is an exhaust motor damper, 109c is a return air motor damper.

  Hereinafter, the air flow of the system will be described.

  The temperature and humidity are adjusted by the cooling coil 102a in the air conditioner 102, and the cooled air is conveyed to the variable air volume device 104 through the air supply fan 102b, and the air whose air volume is adjusted by the variable air volume device 104 is supplied. The air is supplied into the room through the air vent 101a. The air supplied to the chamber 101 processes the heat load in the room, and the air that has finished the heat load is sucked from the return air port 101b and conveyed through the return air fan 105, and the motor dampers 109b and 109c are opened and closed. Controlled and distributed to exhaust air and return air. The return air is mixed with the outside air and is led to the cooling coil 102a in the air conditioner 102 again. The above circulation is repeated to control the room temperature to a predetermined value.

  In such an air conditioning system, based on the detected values of the air conditioner outlet temperature detector 107 and the indoor temperature detector 108, the required air volume of the room 101 is determined by PID calculation so that the indoor temperature becomes a predetermined value. Here, the inverter device 103 reduces the rotation speed of the air supply fan 102b until a damper (not shown) of the variable airflow device 104 is fully opened.

FIG. 11 shows an indoor ventilation system that controls the fan in accordance with the CO ₂ concentration or the CO concentration, and controls the indoor CO ₂ concentration or the CO concentration to be equal to or lower than a predetermined value. It is a ventilation system.

In the figure, 111 is a room to be ventilated having an air supply port 111 a and a return air port 111 b, 112 is an air supply fan, 113 is an inverter that supplies a desired AC voltage to an AC motor that drives the air supply fan 112. Device, 114 is an exhaust fan, 115 is an inverter device that supplies a desired AC voltage to an AC motor that drives the exhaust fan 114, and 116 is a CO ₂ concentration detector that detects the concentration of CO ₂ in the air conveyance path. is there.

  FIG. 12 shows a chamber pressure control system that controls the fan in accordance with the room pressure, and controls the chamber pressures of the adjacent chambers to be the same so that there is no pressure difference between the adjacent chambers. System.

  In the figure, 121 is a chamber that is a pressure control target having an air supply port 121a and a return air port 121b, 122 is a chamber adjacent to the chamber 121 and having a door 122a communicating with the chamber 121, 123 is an air supply fan, 124 Is an inverter that supplies a desired AC voltage to an AC motor that drives the air supply fan 123, 125 has a wind speed detector and a motor damper (not shown), and the wind speed detected by the wind speed detector is a predetermined wind speed. A constant air volume device that adjusts the opening degree of the motor damper so that the motor damper becomes 126, 126 is a motor damper for controlling the room pressure, 127 is an exhaust fan, and 128 is an inverter that supplies a desired AC voltage to an AC motor that drives the exhaust fan 127 The apparatus, 129a is a pressure detector that detects the pressure in the chamber 121, and 129b is a pressure detector that detects the pressure in the chamber 122.

  FIG. 2 shows a circuit configuration of the first embodiment of the present invention, and is a detailed circuit configuration diagram of the inverter device 22 shown in FIG.

  That is, in FIG. 2, 22a is a filter for removing a noise component superimposed on the detected value of the load water amount, and 22b is the water amount for deriving a set value of the target pressure from the detected value of the load water amount from which the noise component has been removed. A conversion calculation unit for calculating a well-known quadratic function expression based on the above and obtaining the set value, 22c is a filter for removing a noise component superimposed on the detected value of the water supply pressure, and 22d is a filter for removing the set value and the noise component. An addition / subtraction calculation unit for obtaining a deviation from the detected value of the removed water supply pressure, 22e is an adjustment unit for outputting an adjustment calculation value such that the deviation becomes zero, and 22f uses the adjustment calculation value as a frequency command. It is an inverter unit that generates an AC voltage having a frequency based on a command and an amplitude corresponding to the frequency and supplies the AC voltage to the motor 13.

  According to this inverter device 22, by adding a so-called water supply pressure control function to the conventional inverter device, the frequency command for performing a relatively high speed operation becomes the internal calculation value of the inverter device 22. It is possible to prevent the influence of the noise component emitted from each of the components of the air conditioning system shown in FIG. 6 and to remove the noise component for each detection value that operates at a relatively low speed. A simple filter 22a and a filter 22c can be installed. Further, in the host controller 21, functions such as the adjusting unit 22e that require high-speed processing can be deleted as compared with the conventional host controller 11, and as a result, the calculation amount of the controller can be reduced.

  In the production system cooling system shown in FIG. 8, the detected value of the load water amount from the flow meter 86 is input to the filter 22a of FIG. 2, and the noise component superimposed on the detected value of the load water amount is removed. The set value of the target pressure is calculated by the conversion calculation unit 22b. On the other hand, the detected value of the water supply pressure from the pressure gauge 87 is input to the filter 22c, and the noise component superimposed on the detected value of the water supply pressure is removed.

  Then, in the same manner as described above, the deviation between the set value and the detected value of the water supply pressure is obtained, the adjustment calculation is performed so that this deviation becomes zero, and the AC based on the frequency command and the amplitude corresponding to the frequency are exchanged. A voltage is generated and supplied to the motor 13.

  In the water supply facility shown in FIG. 9, the detected value of the load water amount from the flow meter 96 is input to the filter 22a of FIG. 2, and the noise component superimposed on the detected value of the load water amount is removed, and the conversion calculation unit 22b Thus, the set value of the target pressure is calculated. On the other hand, the detected value of the water supply pressure from the pressure gauge 97 is input to the filter 22c, and the noise component superimposed on the detected value of the water supply pressure is removed.

  Then, in the same manner as described above, the deviation between the set value and the detected value of the water supply pressure is obtained, the adjustment calculation is performed so that this deviation becomes zero, and the AC based on the frequency command and the amplitude corresponding to the frequency are exchanged. A voltage is generated and supplied to the motor 13.

  In the room pressure control system of FIG. 12, the detected value of the pressure detected by the pressure detector 129b is input to the filter 22a instead of the load water amount shown in FIG. Instead of the water supply pressure shown, a detected value of pressure detected by the pressure detector 129a is input, and the pressure in the chamber 121 and the chamber 122 is controlled to be the same. In the case of this room pressure control system, the conversion calculation unit 22b in FIG. 2 is not necessary.

  That is, the detected pressure value from the pressure sensor 129a of the chamber 121 is input to the filter 22c in FIG. 2, and the noise component superimposed on the detected pressure value is removed. On the other hand, the detected pressure value from the pressure sensor 129b of the chamber 122 is input to the filter 22a of FIG. 2, and the noise component superimposed on the detected pressure value is removed. Then, the addition / subtraction calculation unit 22d calculates the deviation between the output of the filter 22a and the output of the filter 22c, and the adjustment unit 22e performs adjustment calculation so that this deviation becomes zero, and the frequency based on the frequency command and the frequency An AC voltage having the amplitude is generated and supplied to the motor 13.

  FIG. 3 shows a circuit configuration of the second embodiment of the present invention, and is a detailed circuit configuration diagram of the inverter device 23 shown in FIG.

  That is, in FIG. 3, a filter 23a removes a noise component superimposed on the detected value of the outlet temperature by the outlet temperature detector 8, and a filter 23b removes a noise component superimposed on the detected value of the inlet temperature by the inlet temperature detector 8. , 23c is an addition / subtraction operation unit for obtaining a temperature difference at the inlet / outlet which is a difference between the detected value of the outlet temperature and the detected value of the inlet temperature from which the noise component has been removed, and 23d is a setting device for sending the set value of the temperature difference, 23e is an addition / subtraction calculation unit for obtaining a deviation between the set value and the temperature difference, 23f is an adjustment unit for outputting an adjustment calculation value such that the deviation becomes zero, and 23g has the adjustment calculation value as a frequency command. And an inverter unit that generates an AC voltage having an amplitude corresponding to the frequency and supplies the AC voltage to the motor 15.

  According to this inverter device 23, by adding a so-called inlet / outlet temperature difference constant control function to the conventional inverter device, a frequency command for performing a relatively high-speed operation becomes an internal operation value of the inverter device 23. It is possible to prevent the command from being affected by the noise component emitted from each of the components of the air conditioning system shown in FIG. 6, and to remove the noise component for each detection value that operates at a relatively low speed. It is possible to install sufficient filters 23a and 23b. Further, the host controller 21 can delete functions such as the adjustment unit 23f that requires high-speed processing as compared with the conventional host controller 11, and as a result, the calculation amount of the controller can be reduced.

  Further, in the variable air volume air conditioning system of FIG. 10, the detected value of the temperature from the indoor temperature detector 108 is input to the filter 23a of FIG. The detected temperature value from the condenser 107 is input to the filter 23b, the noise component superimposed on the detected temperature value is removed, and the detected value of the indoor temperature and the air conditioner outlet temperature from which the noise component has been removed by the addition / subtraction computing unit 23c. The temperature difference that is the difference from the detected value is obtained.

  Similarly to the above, the adjusting unit 23f performs an adjustment calculation so that the deviation between the set value and the temperature difference becomes zero, and generates a frequency based on the frequency command and an AC voltage having an amplitude corresponding to the frequency. Supplied to the motor 13.

  In the room pressure control system of FIG. 12, the detected value of the pressure detected by the pressure detector 129a is input to the filter 23a in place of the outlet temperature shown in FIG. Instead of the outlet temperature shown, the detected pressure value detected by the pressure detector 129b is input.

  That is, the detected pressure value from the pressure detector 129a is input to the filter 23a of FIG. 3 to remove the noise component superimposed on the detected temperature value, and the detected pressure value from the pressure detector 129b is input to the filter 23b to detect the temperature. The noise component superimposed on the detection value is removed, and the pressure difference between the two chambers, which is the difference between the pressure detection value in the chamber 121 and the pressure detection value in the chamber 122 from which the noise component has been removed by the addition / subtraction calculation unit 23c, is obtained.

  Similarly to the above, the adjusting unit 23f performs an adjustment calculation so that the deviation between the set value and the pressure difference becomes zero, and generates a frequency based on the frequency command and an AC voltage having an amplitude corresponding to the frequency. Supplied to the motor 13.

  FIG. 4 is a circuit configuration diagram showing a second embodiment of the present invention. In this figure, components having the same functions as those of the circuit configuration shown in FIG.

  That is, FIG. 4 shows a circuit configuration diagram of a portion related to the system controller 30 in the air conditioning system shown in FIG. 6 controlling the pump 2 and the pump 4 to a desired state, and the host controller 21 and the inverter device 22 described above. , In addition to the motor 13, the detected value of the outlet side temperature of the cooling water to the refrigerator 3 input from the outlet side temperature detector 8 shown in FIG. 6, that is, the detected value of the outlet temperature, and the operation command issued from the host controller 21 Is provided with an inverter device 31 that supplies a desired AC voltage to the motor 15 that drives the pump 4.

  FIG. 5 shows a circuit configuration of the third embodiment of the present invention, and is a detailed circuit configuration diagram of the inverter device 31 shown in FIG.

  That is, in FIG. 5, 31a is a filter that removes a noise component superimposed on the detected value of the outlet temperature, 31b is a setter that sends out the set value of the outlet temperature, and 31c is an outlet from which the set value and noise component have been removed. Addition / subtraction operation unit for obtaining a deviation from the detected temperature value, 31d is an adjustment unit for outputting an adjustment operation value such that the deviation becomes zero, and 31e has the adjustment operation value as a frequency command, and a frequency based on the frequency command. And an inverter unit that generates an AC voltage having an amplitude corresponding to the frequency and supplies the AC voltage to the motor 15.

  According to this inverter device 31, by adding a so-called outlet temperature constant control function to the conventional inverter device, a frequency command for performing a relatively high speed operation becomes an internal calculation value of the inverter device 31. Is prevented from being affected by the noise component emitted from each of the components of the air conditioning system shown in FIG. 6 and is sufficient to remove the noise component for a detection value that operates at a relatively low speed. A simple filter 31a can be installed. Further, the host controller 21 can delete functions such as the adjustment unit 31d that requires high-speed processing as compared with the conventional host controller 11, and as a result, the calculation amount of the controller can be reduced.

  In the production facility cooling system shown in FIG. 8, the detected value of the flow meter 86 or pressure gauge 87 is input to the filter 31a of FIG. 5, and the noise component superimposed on the detected value of the flow rate or pressure is removed. The adjusting unit 31d performs an adjustment operation so that the deviation between the set value and the detected value of the flow rate or pressure becomes zero, and generates a frequency based on the frequency command and an AC voltage having an amplitude corresponding to the frequency. 13 is supplied.

  In the variable air volume air conditioning system of FIG. 10, the detected temperature value from the indoor temperature detector 108 is input to the filter 31a of FIG. 5, and the noise component superimposed on the detected value of the indoor temperature is removed, and the adjusting unit 31d. Performs an adjustment calculation so that the deviation between the set value and the detected value of the room temperature becomes zero, generates a frequency based on the frequency command and an AC voltage having an amplitude corresponding to the frequency, and supplies it to the motor 13.

In the indoor ventilation system of FIG. 11, the detected value of the CO ₂ concentration is input to the filter 31a instead of the outlet temperature shown in FIG. 5, and the filter 31a is compared with the set value of the CO ₂ concentration set by the setting device 31b. A comparison is made.

That is, the detection value of CO ₂ concentration from the CO ₂ concentration detector 116 is a noise component is inputted superimposed on the detection value of the CO ₂ concentration in the filter 31a of FIG. 5 is removed, adjusted section 31d the set value and CO _The adjustment calculation is performed so that the deviation from the detected value of the _two concentrations becomes zero, and a frequency based on the frequency command and an AC voltage having an amplitude corresponding to the frequency are generated and supplied to the motor 13.

1 is a circuit configuration diagram showing a first embodiment of the present invention. 1 is a circuit configuration diagram showing a first embodiment of the present invention. Circuit configuration diagram showing a second embodiment of the present invention. Circuit configuration diagram showing a second embodiment of the present invention Circuit configuration diagram showing a third embodiment of the present invention. Air conditioning system configuration diagram Circuit configuration diagram showing a conventional example Production equipment cooling system configuration diagram Configuration diagram of water supply equipment Configuration diagram of variable air volume air conditioning system Configuration diagram of indoor ventilation system Configuration diagram of room pressure control system

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Air conditioner, 2 ... Pump, 3 ... Refrigerator, 4 ... Pump, 5 ... Cooling tower, 10, 20, 30 ... System controller, 11 ... Host controller, 12, 14 ... Inverter device, 13, 15 ... Motor, 21: High-order controller, 22, 23, 31 ... Inverter device.

Claims (7)

In an inverter device that supplies a desired AC voltage to an AC motor that drives a fluid transfer device provided in a fluid transfer system,
A first filter for removing a noise component included in a detection value for detecting a state of a predetermined part of the fluid conveyance system;
A conversion operation unit for deriving a state quantity different from the predetermined part of the fluid conveyance system from an output value of the first filter;
A second filter for removing a noise component included in a detection value of a portion corresponding to the state quantity of the fluid conveyance system;
An addition / subtraction operation unit for obtaining a deviation between the output value of the conversion operation unit and the output value of the second filter;
An adjustment unit that performs an adjustment operation so that the deviation becomes zero;
An inverter device comprising: an inverter unit that generates the AC voltage having a frequency corresponding to the frequency at a frequency based on a frequency command value that is the adjustment calculation result. In an inverter device that supplies a desired AC voltage to an AC motor that drives a fluid transfer device provided in a fluid transfer system,
A first filter for removing a noise component included in a detected value of a flow rate at a predetermined portion of the fluid conveyance system;
A conversion calculation unit for deriving a fluid pressure value of the predetermined part from the output value of the first filter;
A second filter for removing a noise component included in a detected value of the fluid pressure of the fluid conveyance system;
An addition / subtraction operation unit for obtaining a deviation between the output value of the conversion operation unit and the output value of the second filter;
An adjustment unit that performs an adjustment operation so that the deviation becomes zero;
An inverter device comprising: an inverter unit that generates the AC voltage having a frequency corresponding to the frequency at a frequency based on a frequency command value that is the adjustment calculation result. In an inverter device that supplies a desired AC voltage to an AC motor that drives a fluid transfer device provided in a fluid transfer system,
A first filter that removes a noise component included in a detected fluid temperature value of a predetermined part of the fluid conveyance system;
A second filter that removes a noise component included in a detected value of the fluid temperature of another part of the fluid conveyance system;
A first addition / subtraction operation unit for adding / subtracting the output value of the second filter from the output value of the first filter;
A second addition / subtraction operation unit for obtaining a deviation between a predetermined set value and the addition / subtraction value;
An adjustment unit that performs an adjustment operation so that the deviation becomes zero;
An inverter device comprising: an inverter unit that generates the AC voltage having a frequency corresponding to the frequency at a frequency based on a frequency command value that is the adjustment calculation result. In an inverter device that supplies a desired AC voltage to an AC motor that drives a fluid transfer device provided in a fluid transfer system,
A first filter that removes a noise component included in the detected value of the outlet side fluid temperature of the heat source device or the air conditioning / ventilation device provided in the fluid conveyance system;
A second filter for removing a noise component contained in the detected value of the fluid temperature on the inlet side of the heat source device or the air conditioning / ventilation device;
A first addition / subtraction operation unit for adding / subtracting the output value of the second filter from the output value of the first filter;
A second addition / subtraction operation unit for obtaining a deviation between a predetermined set value and the addition / subtraction value;
An adjustment unit that performs an adjustment operation so that the deviation becomes zero;
An inverter device comprising: an inverter unit that generates the AC voltage having a frequency corresponding to the frequency at a frequency based on a frequency command value that is the adjustment calculation result. In an inverter device that supplies a desired AC voltage to an AC motor that drives a fluid transfer device provided in a fluid transfer system,
A filter that removes a noise component included in a detection value of a state of a predetermined part of the fluid conveyance system;
An addition / subtraction operation unit for obtaining a deviation between a predetermined set value and the output value of the filter;
An adjustment unit that performs an adjustment operation so that the deviation becomes zero;
An inverter device comprising: an inverter unit that generates the AC voltage having a frequency corresponding to the frequency at a frequency based on a frequency command value that is the adjustment calculation result. In an inverter device that supplies a desired AC voltage to an AC motor that drives a fluid transfer device provided in a fluid transfer system,
A filter that removes a noise component included in the detected value of the outlet side fluid temperature of the heat source device or the air conditioning / ventilation device provided in the fluid conveyance system;
An addition / subtraction operation unit for obtaining a deviation between a predetermined set value and the output value of the filter;
An adjustment unit that performs an adjustment operation so that the deviation becomes zero;
An inverter device comprising: an inverter unit that generates the AC voltage having a frequency corresponding to the frequency at a frequency based on a frequency command value that is the adjustment calculation result. In an inverter device that supplies a desired AC voltage to an AC motor that drives a fluid transfer device provided in a fluid transfer system,
A filter that removes a noise component contained in the detected value of CO ₂ or CO concentration on the outlet side or the inlet side of the air conditioning / ventilation equipment provided in the fluid conveyance system;
An addition / subtraction operation unit for obtaining a deviation between a predetermined set value and the output value of the filter;
An adjustment unit that performs an adjustment operation so that the deviation becomes zero;
An inverter device comprising: an inverter unit that generates the AC voltage having a frequency corresponding to the frequency at a frequency based on a frequency command value that is the adjustment calculation result.

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