WO2022137406A1 - 換気送風機 - Google Patents
換気送風機 Download PDFInfo
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- WO2022137406A1 WO2022137406A1 PCT/JP2020/048282 JP2020048282W WO2022137406A1 WO 2022137406 A1 WO2022137406 A1 WO 2022137406A1 JP 2020048282 W JP2020048282 W JP 2020048282W WO 2022137406 A1 WO2022137406 A1 WO 2022137406A1
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- WIPO (PCT)
- Prior art keywords
- current value
- torque current
- air volume
- angular velocity
- operating point
- Prior art date
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- 238000009423 ventilation Methods 0.000 title claims abstract description 107
- 238000004364 calculation method Methods 0.000 description 21
- 230000001360 synchronised effect Effects 0.000 description 19
- 238000001514 detection method Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 15
- 238000009499 grossing Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 239000011162 core material Substances 0.000 description 4
- 230000005284 excitation Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 241000700605 Viruses Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/08—Arrangements for controlling the speed or torque of a single motor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
- H02P27/12—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation pulsing by guiding the flux vector, current vector or voltage vector on a circle or a closed curve, e.g. for direct torque control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/0003—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
- H02P21/0025—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control implementing a off line learning phase to determine and store useful data for on-line control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/22—Current control, e.g. using a current control loop
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/306—Mass flow
- F05D2270/3061—Mass flow of the working fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/335—Output power or torque
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Definitions
- This disclosure relates to a ventilation blower using a permanent magnet type synchronous motor.
- the difference in the duct route is, for example, the difference in the number of bends and the difference in the angle of bends.
- Ventilation blowers that control the ventilation air volume are disclosed in, for example, Patent Document 1 and Patent Document 2.
- the ventilation air volume is adjusted by controlling a permanent magnet type synchronous motor included in the ventilation blower.
- Patent Document 1 discloses a mathematical formula in which the motor current value Im that controls the motor torque of the motor and the angular velocity ⁇ are linearly approximated.
- Patent Document 2 discloses a proportional equation between the torque current value Iq in vector control defined as the current proportional to the motor torque of the motor and the angular velocity ⁇ , and if it can be controlled according to this equation, the ventilation air volume of the ventilation blower. It is said that can be made almost constant.
- the formula is calculated from the ideal characteristics of the motor and blades, and in the actual product, error factors that hinder the ideal characteristics are included.
- error factors For example, the cogging torque generated between the stator core of the motor and the rotor is an error factor. Further, an increase in the motor current due to iron loss, which is a loss generated inside the iron core material, is an error factor. In addition, an error factor is that an operating torque higher than expected is required due to wind leakage from a gap generated due to the structure of the blower.
- the ventilation air volume according to the actual situation can be obtained, but the memorized angular velocity ⁇ and the torque current value can be obtained.
- Iq increases, the capacity of the storage device increases, which leads to an increase in cost.
- the present disclosure has been made in view of the above, and an object of the present disclosure is to obtain a ventilation blower capable of accurate and fine control of air volume while suppressing costs.
- the ventilation blower includes an inverter main circuit that converts DC power into three-phase AC power by switching a plurality of switching elements, and a stator. It also includes a motor body having a rotor and being driven by the inverter main circuit, a motor control circuit for controlling the inverter main circuit, and a storage device.
- the storage device In the storage device, the angular velocity and torque current value of the rotor at the first operating point at which the first air volume is obtained on the first load characteristic, and the second air volume different from the first air volume on the first load characteristic. The angular velocity and torque current value at the second operating point at which the air volume is obtained are stored.
- the motor control circuit obtains a third air volume on the first load characteristic from the angular speed and torque current value at the first operating point and the angular speed and torque current value at the second operating point.
- the angular speed and torque current value at the point are calculated, and the motor body is driven by the inverter main circuit with the angular speed and torque current value at the third operating point.
- the ventilation blower according to the present disclosure has the effect of being able to control the air volume accurately and finely while keeping costs down.
- the block diagram which shows the structure of the permanent magnet type synchronous motor which concerns on Embodiment 1.
- Characteristic diagram of the ventilation blower shown in FIG. The figure which shows the relationship between the angular velocity and the torque current value when the ventilation air volume is controlled to be constant in the ventilation blower shown in FIG.
- FIG. 1 The figure which shows the angular velocity and the torque current value obtained from the measured value shown in FIG.
- FIG. 1 is a block diagram showing a configuration of a permanent magnet type synchronous motor according to the first embodiment.
- the permanent magnet type synchronous motor 100 includes a rectifying smoothing circuit 2 connected to an AC power supply 1, a PWM-driven inverter main circuit 3, a permanent magnet type motor body 20, and a motor torque control unit 53 as a motor control circuit.
- the motor body 20 includes a stator 21 and a permanent magnet type rotor (not shown).
- the rectifying smoothing circuit 2 is composed of a rectifying circuit 2d and a smoothing capacitor 2c, and supplies DC power converted from AC power supplied from the AC power supply 1 to the inverter main circuit 3.
- the inverter main circuit 3 is composed of transistors 31 to 33 which are switching elements of the upper arm and transistors 34 to 36 which are switching elements of the lower arm.
- the DC power supplied from the rectifying and smoothing circuit 2 is converted into three-phase AC power having a variable voltage and a variable frequency by switching the transistors 31 to 36 in the inverter main circuit 3.
- the motor body 20 is driven by supplying the three-phase AC power output from the inverter main circuit 3 to the motor body 20. That is, a three-phase alternating current is supplied to the stator 21 to control the rotation of the rotor.
- bipolar transistors are used as the transistors 31 to 36, but the element is not limited as long as it is a switching element, so a MOSFET (Metal-Oxide-Semiconductor Dutor Field-Effective Transistor) may be used. ..
- MOSFET Metal-Oxide-Semiconductor Dutor Field-Effective Transistor
- the motor torque control unit 53 includes a voltage detection unit 6 that detects the DC bus voltage Vdc input to the inverter main circuit 3, and an excitation current value Id and a torque current value Iq that detect the motor current value Iu and the motor current value Iv.
- the current detection unit 5 that converts to, the voltage calculation unit 8 that calculates and outputs the d-axis voltage command value Vd * and the q-axis voltage command value Vq *, and the magnetic pole position that obtains the estimated value ⁇ ⁇ of the magnetic pole position of the rotor.
- the detection unit 9, the speed calculation unit 10 that calculates the angular velocity ⁇ r from the estimated value ⁇ ⁇ obtained by the magnetic pole position detection unit 9, and the three-phase voltage command values Vu *, Vv *, Vw * are calculated and output.
- a drive circuit 13 for driving the voltage current and a torque current command generation unit 16 are provided.
- the current detection unit 5 detects the motor current values Iu and Iv flowing in the winding corresponding to the two phases of the stator 21. Specifically, the voltage value generated by the current flowing through the shunt resistors 341 and 351 which are the current detection resistors connected to the emitters of the transistors 34 and 35 of the lower arm of the inverter main circuit 3 is detected and used. The motor current value Iu and the motor current value Iv are detected by converting them into current values. The current detection unit 5 converts the detected motor current value Iu and motor current value Iv into the excitation current value Id and the torque current value Iq.
- the voltage calculation unit 8 calculates the d-axis voltage command value Vd * and the q-axis voltage command value Vq * so that the torque current value Iq output by the current detection unit 5 approaches the torque current command value Iq *. Specifically, the voltage calculation unit 8 is d from the DC bus voltage Vdc, the exciting current value Id, the torque current value Iq, the angular velocity ⁇ r, and the difference value between the torque current command value Iq * and the torque current value Iq. The shaft voltage command value Vd * and the q-axis voltage command value Vq * are calculated and output as applied voltage information.
- the magnetic pole position detection unit 9 can use the excitation current value Id and the torque current value Iq obtained by the current detection unit 5 as motor current information required for sensorless control without using the rotor magnetic pole position detection sensor. That is, the magnetic pole position detecting unit 9 includes the exciting current value Id and the torque current value Iq, the d-axis voltage command value Vd * and the q-axis voltage command value Vq * which are the applied voltage information obtained by the voltage calculation unit 8, and the motor.
- the estimated value ⁇ ⁇ of the magnetic pole position of the rotor can be obtained by using a constant.
- the estimated values ⁇ to obtained by the magnetic pole position detecting unit 9 are output to the current detecting unit 5, and are used as the magnetic pole position ⁇ for obtaining the exciting current value Id and the torque current value Iq.
- the three-phase voltage calculation unit 11 includes the d-axis voltage command value Vd * and the q-axis voltage command value Vq *, which are the applied voltage information obtained by the voltage calculation unit 8, and the estimated value ⁇ ⁇ obtained by the magnetic pole position detection unit 9.
- the command values Vu *, Vv *, and Vw * of the three-phase voltage are calculated and output from.
- the three-phase voltage calculation unit 11 and the PWM modulation circuit 12 constitute an inverter control unit that controls the inverter main circuit 3, and by controlling the inverter main circuit 3, command values Vu *, Vv *, Vw * are given to the motor body 20. A three-phase voltage based on is applied.
- the torque current command generation unit 16 calculates the torque current command value Iq * and outputs it to the voltage calculation unit 8. Next, the configuration of the ventilation blower including the permanent magnet type synchronous motor 100 will be described, and then the method of calculating the torque current command value Iq * by the torque current command generation unit 16 will be described.
- FIG. 2 is a diagram showing a schematic configuration of a ventilation blower using a permanent magnet type synchronous motor according to the first embodiment.
- the ventilation blower 200 includes a permanent magnet type synchronous motor 100, an impeller 60, and a casing 61.
- the impeller 60 is connected to the output shaft 100a of the permanent magnet type synchronous motor 100.
- the impeller 60 is housed inside the casing 61. Electric power is supplied to the permanent magnet type synchronous motor 100 from the AC power supply 1.
- a duct (not shown) is connected to the ventilation blower 200.
- FIG. 3 is a characteristic diagram of the ventilation blower shown in FIG.
- FIG. 4 is a diagram showing the relationship between the angular velocity and the torque current value when the ventilation air volume is controlled to be constant in the ventilation blower shown in FIG.
- I wish I could.
- the angular velocity ⁇ and the torque current value Iq of the permanent magnet type synchronous motor 100 at that time have the characteristics as shown in FIG. In the following description, the angular velocity ⁇ and the torque current value Iq are collectively referred to as parameters.
- the characteristics of the constant ventilation air volume ( ⁇ , Iq) are linear, the cogging torque generated between the stator core and the rotor of the permanent magnet type synchronous motor 100 and the loss generated inside the core material It is not a perfect straight line due to error factors such as an increase in motor current due to iron loss and air leakage from a gap generated due to the structure of the ventilation blower 200. Therefore, in order to improve the control accuracy of the ventilation air volume, the angular velocity ⁇ and the torque current value Iq are actually measured on two or more different load characteristics, and converge on the line connecting the operation points on FIG. 4 obtained from the measured values. As a result, the angular velocity ⁇ and the torque current value Iq are controlled.
- FIG. 4 shows an example in which parameters are actually measured with three different load characteristics. If the angular velocity ⁇ and the torque current value Iq are controlled so as to converge on the line connecting the obtained operating points, the constant value shown in FIG. 3 is shown. Ventilation is performed with the ventilation air volume QL. The more operating points obtained by actual measurement, the better the accuracy of air volume control. If it is necessary to widen the control range for static pressure, the control range can be adjusted while improving the accuracy of air volume control by calculating the line to be converged using the measured values measured with four or more load characteristics. Can be expanded.
- the relationship between the ventilation air volume QL, QM, and QH is QL ⁇ QM ⁇ QH.
- the ventilation air volume QL is the ventilation air volume at the time of a weak notch set in the ventilation blower 200.
- the ventilation air volume QH is the ventilation air volume at the time of a strong notch set in the ventilation blower 200.
- FIG. 5 is a diagram showing the relationship between the parameters of the ventilation air volume QL, the parameters of the ventilation air volume QH, and the parameters of the ventilation air volume QM.
- the QM ( ⁇ Mn , Iq Mn ), which is a parameter in the ventilation air volume QM, is calculated using QL ( ⁇ Ln , Iq Ln ) and QH ( ⁇ Hn , Iq Hn ).
- FIG. 6 is a diagram illustrating the calculation of the torque current value using known operating points on the same load characteristics. Since the ventilation air volume Q ⁇ angular velocity ⁇ is obtained on the same load characteristic, it can be calculated by the following equation (1) on the same load characteristic.
- the angular velocity can be calculated using the following equations (2) and (3).
- ⁇ Mn ((QM-QL), ⁇ Hn + (QH-QM), ⁇ Ln ) / ((QH-QM) + (QM-QL)) ...
- ⁇ Mn ((QM-QL), ⁇ Hn + (QH-QM), ⁇ Ln ) / (QH-QL) ... (3)
- the value of the torque current value Iq at the angular velocity ⁇ is calculated next.
- the square of the angular velocity ⁇ is proportional to the torque. Since the torque current value Iq is proportional to the torque, the square of the angular velocity ⁇ is proportional to the torque current value Iq.
- Iq ⁇ n ⁇ ⁇ 2 + ⁇ n ... (4)
- ⁇ n and ⁇ n are constants with the same load characteristics.
- ⁇ n (Iq Hn -Iq Ln ) / ( ⁇ Hn 2 - ⁇ Ln 2 ) ... (7)
- ⁇ n ( ⁇ Hn 2 ⁇ Iq Ln - ⁇ Ln 2 ⁇ Iq Hn ) / (( ⁇ Hn 2 ⁇ Ln 2 ))... (8)
- FIG. 7 is a diagram showing an example of actually measured values in the first embodiment.
- FIG. 8 is a diagram showing an angular velocity and a torque current value obtained from the actually measured values shown in FIG. 7. For example, from the measured values of the minimum ventilation air volume QH and the ventilation air volume QL shown in FIG. 7, the angular velocity and the torque current value which are the arbitrary ventilation air volume QM shown in FIG. 8 can be obtained.
- the torque current command generation unit 16 performs the above calculation to obtain the torque current command value Iq * for operating the ventilation blower 200 with the target ventilation air volume.
- the torque current command generation unit 16 stores in advance parameters at at least two or more or four or more operating points.
- the torque current command generation unit 16 is instructed to command Q * of the target ventilation air volume. For example, assuming that the command value is QM, the torque current command generation unit 16 obtains the parameter at the operation point where the ventilation air volume is QM from the stored parameters. Further, the ⁇ -Iq characteristic, which is the air volume characteristic, is approximated by connecting the obtained operating points. Then, control is performed so that the actual operating angular velocity and the torque current value are on the approximated ⁇ -Iq characteristics.
- the actual operating angular velocity is the angular velocity at the time when the ventilation blower 200 is operated.
- the permanent magnet type synchronous motor 100 is controlled by using the ⁇ -Iq characteristic obtained by the torque current command generation unit 16, and the target air volume can be obtained.
- first operating points 111 and second There are two operating points (first operating points 111 and second) where the parameters are stored in advance in the torque / current command generation unit 16 on one load characteristic but the ventilation air volume differs between QL and QM.
- the following control is performed when there are two operating points (fourth operating point 114 and fifth operating point 115) that are on different load characteristics but have different ventilation air volumes between QL and QM. Is possible.
- the torque current command generation unit 16 determines the ventilation air volume on the load characteristic from the parameters at the first operating point 111 and the parameters at the second operating point 112 at the third operating point 113. The parameters are calculated. Further, the torque current command generation unit 16 determines the ventilation air volume on the load characteristics from the parameters at the fourth operating point 114 and the parameters at the fifth operating point 115 at the sixth operating point 116. The parameters are calculated. Then, the torque current command generation unit 16 approximates the ⁇ -Iq characteristic in which the ventilation air volume is constant in QM from the parameter at the third operating point 113 and the parameter at the sixth operating point 116. By converging the parameter to the approximated ⁇ -Iq characteristic on any load characteristic, the ventilation air volume can be controlled to be QM. The torque current command value Iq * is obtained by the convergence of the parameters. Therefore, if the parameters at the four operating points are stored, it is possible to accurately realize the operation with an arbitrary load characteristic and an arbitrary ventilation air volume.
- the parameters stored in advance are the parameters actually measured at each operation point for each ventilation blower 200.
- FIG. 9 is a diagram showing an example in which an operating point at which the target ventilation air volume is constant is approximated at multiple points using load characteristics.
- the parameters at the operating point where the ventilation air volume QL and the ventilation air volume QH on the load characteristics n1, n2, ..., M-1, m are stored in advance. From the parameters at these many operating points, the parameters of the operating points that are the target air volumes on the load characteristics n1, n2, ..., M-1, m are calculated. From the calculated parameters, the ⁇ -Iq characteristic that the ventilation air volume is constant at the target air volume is approximated. The accuracy of the approximation is improved by increasing the parameters used for the approximation. By increasing the parameters to be stored in advance, the storage capacity of the storage device and the number of operations can be increased, but the accuracy of the ventilation air volume can be improved.
- the ventilation blower 200 by storing two or more parameters (angular velocity ⁇ , torque current value Iq) at the operating points required by the control software or the like. Accurate air volume control that eliminates the discrepancy between theoretical characteristics and actual conditions is possible. Further, by deriving an operation point having another ventilation air volume from the memorized operation point by calculation, it is possible to easily realize constant control with an arbitrary ventilation air volume instead of stepwise selection of the air volume.
- the physical size of the control circuit installed outside the permanent magnet type synchronous motor 100 can be saved. Can be done. As a result, the proportion of the control circuit in the ventilation blower 200 can be reduced, and the volume of the product can be reduced.
- FIG. 10 is a block diagram showing the configuration of the microcomputer according to the first embodiment.
- the microcomputer 40 includes a CPU (Central Processing Unit) 41 that executes calculations and controls, a RAM (Random Access Memory) 42 that the CPU 41 uses for a work area, a ROM (Read Only Memory) 43 that stores programs and data, and a ROM (Read Only Memory) 43. It includes an I / O (Input / Output) 44, which is hardware for exchanging signals with the outside, and a peripheral device 45 including an oscillator that generates a clock.
- I / O Input / Output
- a function excluding the function of detecting the motor current of the current detecting unit 5 and the function of the voltage detecting unit 6 from each function of the motor torque control unit 53 in the first embodiment can be realized by the microcomputer 40.
- the control executed by the microcomputer 40 is realized by the CPU 41 executing a program which is software stored in the ROM 43.
- the ROM 43 may be a non-volatile memory such as a rewritable flash memory.
- the ROM 43 also functions as a storage device in which the information at the operation point is stored in advance in the torque current command generation unit 16.
- the configuration shown in the above embodiments is an example, and can be combined with another known technique, can be combined with each other, and does not deviate from the gist. It is also possible to omit or change a part of the configuration.
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Abstract
Description
図1は、実施の形態1にかかる永久磁石式同期モータの構成を示すブロック図である。永久磁石式同期モータ100は、交流電源1に接続された整流平滑回路2と、PWM駆動されるインバータ主回路3と、永久磁石式のモータ本体20と、モータ制御回路としてのモータトルク制御部53と、を備える。モータ本体20は、固定子21と、図示していない永久磁石式の回転子とを備える。
ここで、αnとβnとは、同一の負荷特性での定数である。
Claims (2)
- 複数のスイッチング素子がスイッチングされることにより直流電力を三相の交流電力に変換するインバータ主回路と、
固定子および回転子を有して前記インバータ主回路により駆動されるモータ本体と、
前記インバータ主回路を制御するモータ制御回路と、
記憶装置と、を備え、
前記記憶装置には、第1の負荷特性上において第1の風量を得る第1の運転ポイントでの前記回転子の角速度とトルク電流値と、前記第1の負荷特性上において前記第1の風量と異なる第2の風量を得る第2の運転ポイントでの前記角速度と前記トルク電流値とが記憶されており、
前記モータ制御回路は、前記第1の運転ポイントでの前記角速度と前記トルク電流値および前記第2の運転ポイントでの前記角速度と前記トルク電流値とから、前記第1の負荷特性上において第3の風量を得る第3の運転ポイントでの前記角速度と前記トルク電流値を算出し、
前記第3の運転ポイントでの前記角速度と前記トルク電流値とで、前記インバータ主回路に前記モータ本体を駆動させることを特徴とする換気送風機。 - 前記記憶装置には、前記第1の負荷特性上と異なる第2の負荷特性上において前記第1の風量を得る第4の運転ポイントでの前記角速度と前記トルク電流値と、前記第2の負荷特性上において前記第2の風量を得る第5の運転ポイントでの前記角速度と前記トルク電流値とが記憶されており、
前記モータ制御回路は、前記第4の運転ポイントでの前記角速度と前記トルク電流値と、前記第5の運転ポイントでの前記角速度と前記トルク電流値とから、前記第2の負荷特性上において第3の風量を得る第6の運転ポイントでの前記角速度と前記トルク電流値を算出し、前記第3の運転ポイントでの前記角速度と前記トルク電流値と、前記第6の運転ポイントでの前記角速度と前記トルク電流値とから、前記角速度と前記トルク電流値との関係を示す風量特性を得ることを特徴とする請求項1に記載の換気送風機。
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JP2001193688A (ja) * | 2000-01-17 | 2001-07-17 | Mitsubishi Electric Corp | 送風装置及び流体圧送装置の駆動装置 |
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JP2015010530A (ja) * | 2013-06-28 | 2015-01-19 | パナソニックIpマネジメント株式会社 | 換気装置 |
JP5743909B2 (ja) | 2011-01-27 | 2015-07-01 | 三菱電機株式会社 | Pwmインバータ駆動永久磁石式同期モータおよび換気送風機の制御方法 |
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JP2001193688A (ja) * | 2000-01-17 | 2001-07-17 | Mitsubishi Electric Corp | 送風装置及び流体圧送装置の駆動装置 |
JP2002165477A (ja) * | 2000-11-21 | 2002-06-07 | Mitsubishi Electric Corp | インバータ装置および送風装置 |
JP5743909B2 (ja) | 2011-01-27 | 2015-07-01 | 三菱電機株式会社 | Pwmインバータ駆動永久磁石式同期モータおよび換気送風機の制御方法 |
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