WO2022149209A1 - 電力変換装置、モータ駆動装置及び冷凍サイクル適用機器 - Google Patents
電力変換装置、モータ駆動装置及び冷凍サイクル適用機器 Download PDFInfo
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- WO2022149209A1 WO2022149209A1 PCT/JP2021/000195 JP2021000195W WO2022149209A1 WO 2022149209 A1 WO2022149209 A1 WO 2022149209A1 JP 2021000195 W JP2021000195 W JP 2021000195W WO 2022149209 A1 WO2022149209 A1 WO 2022149209A1
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- rotation speed
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 24
- 230000001133 acceleration Effects 0.000 claims abstract description 23
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 238000005057 refrigeration Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 16
- 230000006870 function Effects 0.000 description 14
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000003507 refrigerant Substances 0.000 description 6
- 230000010349 pulsation Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/02—Compressor arrangements of motor-compressor units
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
- H02M7/5395—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
Definitions
- the present disclosure relates to a power conversion device, a motor drive device, and a refrigeration cycle applicable device for converting AC power into desired power.
- the power converter has a converter that converts the AC voltage output from the AC power supply into a DC voltage, a smoothing section that smoothes the output voltage of the converter, and a smoothing section that converts the DC voltage output through the smoothing section into an AC voltage. It is equipped with an inverter that applies to the load.
- Patent Document 1 describes a power conversion device for driving a compressor.
- the vibration component when the DC voltage applied to the inverter is vibrating or when the load torque is suppressed, the vibration component is superimposed on the current flowing through the inverter.
- this vibration component and the rotation speed of the motor match or become close to each other, they affect each other and cause a roaring sound in the motor.
- Patent Document 1 when the frequency that is an integral multiple of the operating frequency of the motor is in the range of a value close to twice the power supply frequency, the operating frequency of the motor is changed at the same rate as the increase and decrease. By doing so, the generation of growl noise is suppressed.
- the present disclosure has been made in view of the above, and an object thereof is to obtain a power conversion device capable of smoothly accelerating and decelerating a motor while suppressing the generation of roaring noise.
- the power conversion device includes a converter, a capacitor, an inverter and a control unit.
- the converter rectifies the AC voltage applied from the AC power supply.
- the capacitor is connected to the output end of the converter.
- the inverter is connected to both ends of the capacitor.
- the control unit controls the operation of the inverter.
- the voltage output from the converter includes pulsating components caused by voltage fluctuations of the AC voltage.
- the figure which shows the structure of the power conversion apparatus which concerns on Embodiment 1. A block diagram showing a configuration example of the control calculation unit according to the first embodiment.
- a block diagram showing a configuration example of the control calculation unit according to the second embodiment The figure which shows an example of the generation pattern of the rotation speed command and the voltage limiting coefficient in Embodiment 2. The figure which shows the generation pattern of the rotation speed command and another example of a voltage limiting coefficient in Embodiment 2. The figure which shows the structural example of the refrigerating cycle application apparatus which concerns on Embodiment 3.
- FIG. 1 is a diagram showing a configuration of a power conversion device 1 according to the first embodiment.
- the power conversion device 1 is connected to the AC power supply 100 and the compressor 120.
- the compressor 120 is an example of a load.
- the compressor 120 has a motor 110.
- the power conversion device 1 converts a first AC voltage, which is a power supply voltage applied from the AC power supply 100, into a second AC voltage having a desired amplitude and phase, and applies the first AC voltage to the motor 110.
- the power conversion device 1 includes a voltage / current detector 16, a converter 10, a capacitor 12, a voltage detector 18, an inverter 14, current detectors 20u, 20v, 20w, and a control unit 30.
- the motor drive device 2 is composed of the power conversion device 1 and the motor 110 included in the compressor 120.
- the voltage / current detection unit 16 detects the first AC voltage applied to the converter 10 from the AC power supply 100, and also detects the AC current flowing in and out of the converter 10. Each detection value by the voltage / current detection unit 16 is input to the control unit 30.
- the converter 10 rectifies the first AC voltage applied from the AC power supply 100.
- the converter 10 is configured by using a plurality of bridge-connected rectifying elements 10a.
- the arrangement and connection of the rectifying element 10a in the converter 10 are known, and the description thereof is omitted here.
- the converter 10 may have a boosting function for boosting the rectified voltage as well as a rectifying function.
- a converter having a boosting function may be configured to include one or more switching elements or a plurality of switching elements in which a transistor element and a diode are connected in antiparallel in addition to the rectifying element 10a or in place of the rectifying element 10a. can.
- the arrangement and connection of switching elements in a converter having a boosting function are known, and the description thereof is omitted here.
- the rectified voltage rectified by the converter 10 is applied to the capacitor 12.
- the capacitor 12 is connected to the output end of the converter 10.
- the capacitor 12 holds the rectified voltage output by the converter 10. Examples of the capacitor 12 include an electric field capacitor and a film capacitor.
- the voltage detector 18 detects the capacitor voltage Vc, which is the voltage of the capacitor 12. The detected value of the voltage detector 18 is input to the control unit 30.
- the inverter 14 is connected to both ends of the capacitor 12.
- the inverter 14 converts the voltage output from the capacitor 12 into a second AC voltage having a desired amplitude and phase, and applies it to the motor 110 of the compressor 120.
- the inverter 14 is configured by using a plurality of switching elements 14a in which a transistor element and a diode are connected in antiparallel. The arrangement and connection of the switching element 14a in the inverter 14 are known, and the description thereof is omitted here.
- Current detectors 20u, 20v, 20w are provided in the electrical wiring connecting the inverter 14 and the motor 110.
- the current detectors 20u, 20v, and 20w each detect the current for each one of the three-phase currents iu, iv, and iw output from the inverter 14.
- the detected values of the current detectors 20u, 20v, and 20w are input to the control unit 30.
- FIG. 1 illustrates a configuration including three current detectors 20u, 20v, 20w, but the configuration is not limited to this configuration.
- the compressor 120 is a load having a motor 110 for driving the compressor.
- the motor 110 rotates according to the amplitude and phase of the second AC voltage applied from the inverter 14, and performs a compression operation.
- the control unit 30 has a control calculation unit 32 and a drive unit 34, and controls the operation of the inverter 14 using the detection values detected by each detector.
- the control calculation unit 32 generates a voltage command for controlling the pulse width modulation (PWM) of the inverter 14.
- PWM pulse width modulation
- the control calculation unit 32 generates a voltage command that matches the rotation speed of the motor 110 with the rotation speed command, and outputs the voltage command to the drive unit 34.
- the drive unit 34 uses the voltage command generated by the control calculation unit 32 to generate a drive signal for driving a plurality of switching elements 14a of the inverter 14.
- the rotation speed of the motor 110 is controlled by PWM control of the switching element 14a of the inverter 14.
- control unit 30 does not have to use all the detected values acquired from each detector, and may perform control using some of the detected values.
- FIG. 2 is a block diagram showing a configuration example of the control calculation unit 32 according to the first embodiment.
- the control calculation unit 32 includes a rotation speed command generation unit 321, a speed control unit 322, a torque control unit 323, and a speed estimation unit 324.
- the rotation speed command generation unit 321 generates a rotation speed command given to the motor 110.
- the rotation speed command generated by the rotation speed command generation unit 321 is input to the speed control unit 322.
- the speed control unit 322 generates a basic torque command that matches the estimated rotation speed with the rotation speed command, and outputs it to the torque control unit 323.
- Speed control by a general proportional integral (PID) controller or a general proportional integral (PI) controller can be applied to the calculation of the basic torque command.
- PID general proportional integral
- PI general proportional integral
- a controller other than the PID controller or PI controller may be used as long as the desired control performance can be obtained.
- the torque control unit 323 generates a voltage command that matches the output torque of the motor 110 with the basic torque command, and outputs the voltage command to the drive unit 34. It is known that in order to control the output torque of the motor 110 to a desired value, it is preferable to control the dq-axis current, which is the current in the dq-axis coordinate system. However, needless to say, control may be performed by a current in a coordinate system other than the dq-axis coordinate system. A general PI controller can be used to control the dq-axis current. However, a controller other than the PI controller may be used as long as the desired control performance can be obtained.
- the speed estimation unit 324 generates an estimated rotation speed based on the voltage command and the detected current.
- the estimated rotation speed is an estimated value of the rotation speed of the motor 110.
- a case where a PI controller is used and a case where a PI controller and an integrator are connected in series are known. However, a configuration other than these cases may be used as long as the desired control performance can be obtained.
- FIG. 3 is a diagram showing a typical rotation speed command generation pattern.
- FIG. 4 is a diagram showing an example of a rotation speed command generation pattern in the first embodiment.
- the horizontal axis of FIGS. 3 and 4 represents time, and the vertical axis indicates a rotation speed command.
- 3 and 4 show time-varying waveforms of rotation speed commands when accelerating the motor 110 to the target rotation speed Rps tar . Further, on the right side of FIGS. 3 and 4, the enlarged waveform of the portion shown by the broken line circle in the left figure is shown. In the following description, it is assumed that the actual rotation speed of the motor 110 and the rotation speed command are substantially the same.
- Rps vib is a rotation speed command when the above-mentioned growl noise becomes loud.
- the growl does not occur pinpointly, but occurs within the range of the rotation speed command having a certain width. Therefore, in the control of the first embodiment, a range having a width of ⁇ ⁇ rps, that is, a range of 2 ⁇ rps is set before and after the Rps vib , and this range is defined as a “first speed range”.
- the period corresponding to the first speed range that is, the period in which the rotation speed of the motor 110 becomes the first speed range is defined as the "first period" and is represented by tvib .
- FIG. 5 is a diagram used to explain the causes of roaring sounds that can occur in the configuration of the first embodiment.
- the horizontal axis of FIG. 5 represents time, and the vertical axis represents the amplitude of each waveform.
- the power supply voltage is shown by a solid line
- the rectified voltage is shown by a broken line.
- the U-phase voltage command is shown by a solid line
- the V voltage command is shown by a broken line
- the W-phase voltage command is shown by a long-dashed line.
- the rectified voltage output from the converter 10 includes a pulsating component.
- the period of the voltage command of each phase coincides with the period of the power supply voltage. Therefore, the pulsating component of the rectified voltage becomes a valley at the position where the waveform of the U-phase voltage command becomes a peak and a valley, and this state is repeated. As shown in FIG. 5, there is a high possibility that a growl sound will be generated.
- the acceleration / deceleration rate of the rotation speed command is set in the first period ( t'vib ) in which the rotation speed of the motor 110 is in the first speed range (2 ⁇ rps). It is changed from the default value, that is, the acceleration / deceleration rate at the time of normal control.
- the rotation speed command is an example of a command value of a physical quantity related to a change in the rotation speed.
- the control unit 30 drives the motor 110 at the acceleration / deceleration rate during normal control until the first period t'vib is reached in both acceleration and deceleration. do.
- the motor 110 When the first period t'vib is reached, the motor 110 is driven at an acceleration / deceleration rate larger than the acceleration / deceleration rate at the time of normal control. Then, after passing through the first period t'vib , the motor 110 is driven at the acceleration / deceleration rate at the time of normal control.
- the rotation speed command generation unit 321 generates and outputs an acceleration / deceleration rate rate according to the following equation (1).
- the time t1 is the time when the rotation speed command is Rps vib ⁇ rps
- the time t2 is the time when the rotation speed command is Rps vib + ⁇ rps.
- the acceleration / deceleration rate is increased in the first speed range before and after the rotation speed that affects the pulsation of the DC voltage caused by the power supply frequency fs, but the present invention is limited to this example. Not done.
- a first speed range corresponding to the frequency may be set, and control may be performed to increase the acceleration / deceleration rate in the first speed range.
- FIG. 6 is a diagram showing another example of the generation pattern of the rotation speed command in the first embodiment.
- the output of the rotation speed command is stopped in the first period t'vib .
- the rotation speed command is not given to the motor 110.
- the first period t'vib increases the acceleration / deceleration rate from a macroscopic point of view. You can see it. Therefore, it is possible to obtain the same effect as in the case of the control of FIG.
- the control unit when the control unit accelerates / decelerates the motor, the control unit rotates in the first period in which the rotation speed of the motor becomes the first speed range. Change the speed command from the command value during normal control. This makes it possible to smoothly accelerate and decelerate the motor while suppressing the generation of roaring noise.
- the acceleration / deceleration rate which is the amount of change in the rotation speed command per unit time, is set to be larger than the reciprocal of the cycle of the AC power supply.
- the rotation speed command may be skipped without being given to the motor. Even in this way, the effect of increasing the acceleration / deceleration rate can be obtained.
- FIG. 7 is a block diagram showing an example of a hardware configuration that realizes the function of the control calculation unit 32 in the first embodiment.
- FIG. 8 is a block diagram showing another example of the hardware configuration that realizes the function of the control calculation unit 32 in the first embodiment.
- the processor 200 performing the calculation and the memory 202 in which the program read by the processor 200 is stored are stored.
- the interface 204 for inputting and outputting signals can be included.
- the processor 200 may be an arithmetic unit such as an arithmetic unit, a microprocessor, a microcomputer, a CPU (Central Processing Unit), or a DSP (Digital Signal Processor).
- the memory 202 includes a non-volatile or volatile semiconductor memory such as a RAM (Radom Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Project ROM), and an EEPROM (registered trademark) (Electrically EPROM). Examples thereof include magnetic discs, flexible discs, optical discs, compact discs, mini discs, and DVDs (Digital York Disc).
- the memory 202 stores a program that executes the function of the control calculation unit 32 in the first embodiment.
- the processor 200 sends and receives necessary information via the interface 204, the processor 200 executes a program stored in the memory 202, and the processor 200 refers to a table stored in the memory 202 to perform the above-mentioned processing. It can be carried out.
- the calculation result by the processor 200 can be stored in the memory 202.
- the processing circuit 203 shown in FIG. 8 can also be used.
- the processing circuit 203 corresponds to a single circuit, a composite circuit, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof.
- the information input to the processing circuit 203 and the information output from the processing circuit 203 can be obtained via the interface 204.
- control calculation unit 32 may be performed in the processing circuit 203, and processing not performed in the processing circuit 203 may be performed in the processor 200 and the memory 202.
- FIG. 9 is a block diagram showing a configuration example of the control calculation unit 32a according to the second embodiment.
- the voltage limiting unit 325 is added and the rotation speed command generation unit 321 is replaced with the rotation speed command generation unit 321a as compared with the configuration shown in FIG. ..
- Other configurations are the same as or equivalent to those in FIG. 2, and the same or equivalent components are indicated by the same reference numerals, and duplicate explanations are omitted.
- the rotation speed command generation unit 321 of the first embodiment is a configuration unit that generates the rotation speed command of the pattern shown in FIG. 4, whereas the rotation speed command generation unit 321a of the second embodiment is shown in FIG. It is a component that generates a rotation speed command of a pattern. That is, the function described in the first embodiment is not added to the rotation speed command generation unit 321a of the second embodiment.
- the torque control unit 323 generates a first voltage command that matches the output torque of the motor 110 with the basic torque command, and outputs the first voltage command to the voltage limiting unit 325.
- the voltage limiting unit 325 controls acceleration / deceleration of the motor 110
- the voltage limiting unit 325 limits the magnitude of the first voltage command in the first period in which the rotation speed of the motor 110 is in the first speed range. Is generated and output to the drive unit 34.
- the second voltage command is an example of the command value of the physical quantity related to the change in the rotation speed.
- the drive unit 34 drives the inverter 14 by using the second voltage command generated by the voltage limit unit 325. That is, the rotation speed of the motor 110 is controlled based on the second voltage command.
- FIG. 10 is a diagram showing an example of a rotation speed command generation pattern and a voltage limiting coefficient in the second embodiment.
- the horizontal axis of FIG. 10 represents time.
- the vertical axis of the upper figure of FIG. 10 shows the rotation speed command
- the vertical axis of the lower figure shows the voltage limiting coefficient.
- the upper figure is the same as the figure shown on the right side of FIG.
- the voltage limiting unit 325 calculates a voltage limiting coefficient ⁇ for limiting the magnitude of the first voltage command.
- the voltage limiting factor ⁇ is a real number greater than 0 and less than or equal to 1.
- the voltage limiting unit 325 multiplies the first voltage command by the voltage limiting coefficient ⁇ in the first period tvib where the rotation speed of the motor 110 is in the first speed range, and uses the multiplication result as the second voltage command. Output.
- the voltage applied to the motor is limited in the first period tvib .
- the peak value of the motor current is reduced as compared with the case where the voltage applied to the motor is not limited, so that the growl noise can be reduced.
- the temporarily set voltage limiting coefficient ⁇ may be updated in the actual environment. For example, in actual operation, the voltage limiting coefficient ⁇ is gradually lowered, and the voltage limiting coefficient ⁇ 'when a problem such as step-out occurs is stored. Then, it is conceivable to set the voltage limiting coefficient ⁇ used in actual operation within a range that does not fall below the stored voltage limiting coefficient ⁇ '.
- FIG. 10 is a diagram showing another example of the rotation speed command generation pattern and the voltage limiting coefficient in the second embodiment.
- the upper view of FIG. 11 is the same as the upper view of FIG. 10.
- the value of the voltage limiting coefficient ⁇ is usually gradually changed from “1”. By doing so, it is possible to seamlessly limit the voltage without giving a shock to the control of the rotation of the motor 110.
- FIGS. 10 and 11 are examples, and are not limited to these examples. Any control method may be used as long as the voltage applied to the motor 110 is limited according to the rotation speed, and the control target is not limited.
- the rotation speed command generation unit 321a for generating the rotation speed command of the pattern shown in FIG. 3 is used, but the rotation speed command generation unit 321 applied in the first embodiment is used for control. You may. If the rotation speed command generation unit 321a according to the second embodiment is configured by using the rotation speed command generation unit 321 according to the first embodiment, the effect of the first embodiment can be obtained in addition to the effect of the second embodiment. Can be done.
- the control unit when the control unit controls acceleration / deceleration of the motor, the control unit has a first period in which the rotation speed of the motor is in the first speed range.
- the voltage command of 2 is changed from the command value at the time of normal control.
- the second voltage command is made smaller than the voltage command at the time of normal control.
- the second voltage command may be continuously changed. By doing so, the voltage can be seamlessly limited without giving a shock to the control of the rotation of the motor.
- FIG. 12 is a diagram showing a configuration example of the refrigeration cycle application device 900 according to the third embodiment.
- the refrigeration cycle application device 900 according to the third embodiment includes the power conversion device 1 described in the first embodiment.
- the refrigeration cycle application device 900 according to the third embodiment can be applied to products including a refrigeration cycle such as an air conditioner, a refrigerator, a freezer, and a heat pump water heater.
- a refrigeration cycle such as an air conditioner, a refrigerator, a freezer, and a heat pump water heater.
- the components having the same functions as those of the first embodiment are designated by the same reference numerals as those of the first embodiment.
- the compressor 120 having a built-in motor 110, the four-way valve 902, the indoor heat exchanger 906, the expansion valve 908, and the outdoor heat exchanger 910 form a refrigerant pipe 912 according to the first embodiment. It is attached via.
- a compression mechanism 904 for compressing the refrigerant and a motor 110 for operating the compression mechanism 904 are provided inside the compressor 120.
- the refrigeration cycle applicable device 900 can perform heating operation or cooling operation by switching operation of the four-way valve 902.
- the compression mechanism 904 is driven by a motor 110 that is controlled at a variable speed.
- the refrigerant is pressurized by the compression mechanism 904 and sent out, and passes through the four-way valve 902, the indoor heat exchanger 906, the expansion valve 908, the outdoor heat exchanger 910 and the four-way valve 902. Return to the compression mechanism 904.
- the refrigerant is pressurized by the compression mechanism 904 and sent out, and passes through the four-way valve 902, the outdoor heat exchanger 910, the expansion valve 908, the indoor heat exchanger 906 and the four-way valve 902. Return to the compression mechanism 904.
- the indoor heat exchanger 906 acts as a condenser to release heat, and the outdoor heat exchanger 910 acts as an evaporator to absorb heat.
- the outdoor heat exchanger 910 acts as a condenser to release heat, and the indoor heat exchanger 906 acts as an evaporator to absorb heat.
- the expansion valve 908 depressurizes the refrigerant and expands it.
- 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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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Multiple Motors (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
図1は、実施の形態1に係る電力変換装置1の構成を示す図である。電力変換装置1は、交流電源100及び圧縮機120に接続される。圧縮機120は、負荷の一例である。圧縮機120は、モータ110を有する。電力変換装置1は、交流電源100から印加される電源電圧である第1の交流電圧を所望の振幅及び位相を有する第2の交流電圧に変換してモータ110に印加する。
-(Rpsvib-Δrps)/(t2-t1)
=2Δrps/t'vib …(1)
図9は、実施の形態2に係る制御演算部32aの構成例を示すブロック図である。実施の形態2に係る制御演算部32aでは、図2に示す構成と比較すると、電圧制限部325が追加されると共に、回転速度指令生成部321が回転速度指令生成部321aに置き替えられている。その他の構成は、図2と同一又は同等であり、同一又は同等の構成部には同一の符号を付して示すと共に、重複する説明は割愛する。
図12は、実施の形態3に係る冷凍サイクル適用機器900の構成例を示す図である。実施の形態3に係る冷凍サイクル適用機器900は、実施の形態1で説明した電力変換装置1を備える。実施の形態3に係る冷凍サイクル適用機器900は、空気調和機、冷蔵庫、冷凍庫、ヒートポンプ給湯器といった冷凍サイクルを備える製品に適用することが可能である。なお、図12において、実施の形態1と同様の機能を有する構成要素には、実施の形態1と同一の符号を付している。
Claims (7)
- 交流電源から印加される交流電圧を整流するコンバータと、
前記コンバータの出力端に接続されるコンデンサと、
前記コンデンサの両端に接続されるインバータと、
前記インバータの動作を制御する制御部と、
を備え、
前記コンバータから出力される電圧には前記交流電圧の電圧変動に起因する脈動成分が含まれ、
前記制御部は、モータを加減速制御する際、前記モータの回転速度が第1の速度範囲となる第1の期間において、前記回転速度の変化に関係する物理量の指令値を当該物理量の通常制御時の指令値から変更する
電力変換装置。 - 前記指令値は、前記モータに付与する回転速度指令であり、
前記第1の期間において、前記回転速度指令の単位時間当たりの変化量である加減速レートは、前記交流電源の周期の逆数よりも大きくなっている
請求項1に記載の電力変換装置。 - 前記第1の期間において、前記回転速度指令は前記モータに付与されない
請求項2に記載の電力変換装置。 - 前記指令値は、前記インバータに付与する電圧指令であり、
前記第1の期間において、前記電圧指令は、前記通常制御時の電圧指令よりも小さくなっている
請求項1から3の何れか1項に記載の電力変換装置。 - 前記第1の期間の前後において、前記電圧指令は連続的に変化している
請求項4に記載の電力変換装置。 - 請求項1から5の何れか1項に記載の電力変換装置を備えるモータ駆動装置。
- 請求項1から5の何れか1項に記載の電力変換装置を備える冷凍サイクル適用機器。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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JP2022573835A JP7345690B2 (ja) | 2021-01-06 | 2021-01-06 | 電力変換装置、モータ駆動装置及び冷凍サイクル適用機器 |
EP21917437.2A EP4277108A4 (en) | 2021-01-06 | 2021-01-06 | POWER CONVERSION DEVICE, MOTOR DRIVE DEVICE AND REFRIGERANT CYCLE APPLICATION DEVICE |
AU2021417065A AU2021417065B2 (en) | 2021-01-06 | 2021-01-06 | Power conversion device, motor driving device, and refrigeration-cycle application device |
CN202180087843.8A CN116802983A (zh) | 2021-01-06 | 2021-01-06 | 电力转换装置、马达驱动装置以及制冷循环应用设备 |
PCT/JP2021/000195 WO2022149209A1 (ja) | 2021-01-06 | 2021-01-06 | 電力変換装置、モータ駆動装置及び冷凍サイクル適用機器 |
US18/253,996 US20240007019A1 (en) | 2021-01-06 | 2021-01-06 | Power converter, motor driver, and refrigeration cycle applied equipment |
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JPS59132793A (ja) * | 1983-01-20 | 1984-07-30 | Meidensha Electric Mfg Co Ltd | インバ−タ装置の制御方式 |
JPH0568305A (ja) * | 1991-09-06 | 1993-03-19 | Toshiba Toransupooto Eng Kk | 交流電気車制御装置 |
JPH07222478A (ja) * | 1994-01-28 | 1995-08-18 | Mitsubishi Electric Corp | インバータ制御装置 |
JPH0835711A (ja) * | 1994-07-22 | 1996-02-06 | Hitachi Ltd | インバータ付き空気調和機およびその制御方法 |
JP2007104756A (ja) | 2005-09-30 | 2007-04-19 | Matsushita Electric Ind Co Ltd | インバータ制御装置 |
JP2017184427A (ja) * | 2016-03-30 | 2017-10-05 | ローム株式会社 | モータの駆動回路および起動方法、プリンタ装置 |
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JP4665809B2 (ja) * | 2006-03-24 | 2011-04-06 | トヨタ自動車株式会社 | 電動機駆動制御システム |
JP6591075B2 (ja) * | 2016-08-22 | 2019-10-16 | 三菱電機株式会社 | モータ駆動装置、ヒートポンプ装置および冷凍空調装置 |
JP6369517B2 (ja) * | 2016-09-30 | 2018-08-08 | ダイキン工業株式会社 | 電力変換器の制御装置 |
JP6343037B1 (ja) * | 2017-01-11 | 2018-06-13 | 日立ジョンソンコントロールズ空調株式会社 | モータ駆動装置および冷凍機器 |
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2021
- 2021-01-06 AU AU2021417065A patent/AU2021417065B2/en active Active
- 2021-01-06 WO PCT/JP2021/000195 patent/WO2022149209A1/ja active Application Filing
- 2021-01-06 US US18/253,996 patent/US20240007019A1/en active Pending
- 2021-01-06 JP JP2022573835A patent/JP7345690B2/ja active Active
- 2021-01-06 EP EP21917437.2A patent/EP4277108A4/en active Pending
- 2021-01-06 CN CN202180087843.8A patent/CN116802983A/zh active Pending
Patent Citations (6)
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JPS59132793A (ja) * | 1983-01-20 | 1984-07-30 | Meidensha Electric Mfg Co Ltd | インバ−タ装置の制御方式 |
JPH0568305A (ja) * | 1991-09-06 | 1993-03-19 | Toshiba Toransupooto Eng Kk | 交流電気車制御装置 |
JPH07222478A (ja) * | 1994-01-28 | 1995-08-18 | Mitsubishi Electric Corp | インバータ制御装置 |
JPH0835711A (ja) * | 1994-07-22 | 1996-02-06 | Hitachi Ltd | インバータ付き空気調和機およびその制御方法 |
JP2007104756A (ja) | 2005-09-30 | 2007-04-19 | Matsushita Electric Ind Co Ltd | インバータ制御装置 |
JP2017184427A (ja) * | 2016-03-30 | 2017-10-05 | ローム株式会社 | モータの駆動回路および起動方法、プリンタ装置 |
Non-Patent Citations (1)
Title |
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See also references of EP4277108A4 |
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JPWO2022149209A1 (ja) | 2022-07-14 |
EP4277108A1 (en) | 2023-11-15 |
CN116802983A (zh) | 2023-09-22 |
AU2021417065A1 (en) | 2023-07-06 |
EP4277108A4 (en) | 2024-02-07 |
JP7345690B2 (ja) | 2023-09-15 |
US20240007019A1 (en) | 2024-01-04 |
AU2021417065B2 (en) | 2024-01-25 |
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