WO2013099203A1 - Dispositif onduleur de moteur - Google Patents

Dispositif onduleur de moteur Download PDF

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Publication number
WO2013099203A1
WO2013099203A1 PCT/JP2012/008233 JP2012008233W WO2013099203A1 WO 2013099203 A1 WO2013099203 A1 WO 2013099203A1 JP 2012008233 W JP2012008233 W JP 2012008233W WO 2013099203 A1 WO2013099203 A1 WO 2013099203A1
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WO
WIPO (PCT)
Prior art keywords
motor
voltage
phase
inverter
advance angle
Prior art date
Application number
PCT/JP2012/008233
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English (en)
Japanese (ja)
Inventor
貴史 福榮
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パナソニック株式会社
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Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Priority to JP2013551232A priority Critical patent/JP6098945B2/ja
Priority to CN201280064745.3A priority patent/CN104025450B/zh
Publication of WO2013099203A1 publication Critical patent/WO2013099203A1/fr

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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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/065—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a reluctance motor
    • 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
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • 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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac 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

Definitions

  • the present invention relates to a motor inverter device that drives a motor with a variable voltage / variable frequency AC output obtained by switching a full-wave rectified output using a single-phase AC power source as an input.
  • FIG. 13 shows a schematic configuration of a conventional motor inverter device.
  • the conventional motor inverter device shown in FIG. 13 has a rectifier circuit 102 that full-wave rectifies the output of the single-phase AC power supply 101, and a variable voltage / variable frequency AC output obtained by switching the rectified output of the rectifier circuit 102.
  • an inverter 104 for driving the motor 103.
  • the conventional motor inverter device includes a signal generator 105 for generating a PWM signal for turning on / off the switching element of the inverter 104 based on a voltage command value, and the pulse width increase control of the PWM signal.
  • a control means for performing control for advancing the phase of the inverter output voltage by advancing the output timing of the PWM signal when an inverter output voltage corresponding to the voltage command value cannot be obtained. .
  • the output voltage phase of the inverter 104 is advanced and the inverter output is output during the period in which the torque supply from the single-phase AC power supply 101 to the motor 103 is interrupted by the regenerative current.
  • the motor 103 is forcibly supplied with current. For this reason, a current forcibly flows from the inverter output to the motor 103 every half cycle of the single-phase AC power supply 101, the effective current value of the motor 103 increases, and the motor loss increases.
  • a motor inverter device for a compressor such as an air conditioner in which a stable DC voltage with a sufficiently large smoothing capacitor inserted on the input side of the inverter 104 and a small pulsation is applied to the inverter 104
  • the operation period of In order to improve efficiency in a long low-speed rotation speed range, it is common to use a motor 103 having a higher induced voltage.
  • the inverter output In a motor inverter device using such a motor 103, in a motor inverter device in which a single-phase AC power supply 101 is an input and the full-wave rectified output is not sufficiently smoothed, the inverter output is output every half cycle of the single-phase AC power supply 101. The amount of current that is forced to flow from the motor to the motor 103 increases. For this reason, in such a motor inverter apparatus, motor loss increases remarkably.
  • the output timing of the PWM signal is advanced, the phase of the inverter output voltage is advanced, and the field weakening control for forcibly flowing the current to the motor 103 is not performed, the single-phase AC power supply 101
  • the regenerative current flows from the motor 103 every half cycle, and the circuit loss due to the regenerative current increases in the inverter 104 and the capacitor.
  • the field-weakening control is performed by advancing the phase of the inverter output voltage so as not to generate a regenerative current, a large current is forced to flow to the motor 103, which has a problem that efficiency is deteriorated. .
  • An object of the present invention is to provide a high-efficiency motor inverter device that suppresses loss of each part including motor loss while maintaining the motor output torque required for a motor that is a load.
  • the motor inverter device of the present invention provides: A rectifier circuit with a single-phase AC power supply as input, An inverter that converts the output DC power of the rectifier circuit into AC power; A control unit for PWM driving control of the inverter; A resonance frequency is set to 40 times or more of the frequency of the single-phase AC power source, and a reactor arranged on a connection line from the single-phase AC power source to the inverter and a capacitor connected in parallel to the input side of the inverter A configured smoothing section; A motor that is driven and controlled by the inverter and is a permanent magnet motor including reluctance torque in output torque; An advance angle adjusting device for adjusting the phase of the PWM control signal output from the control unit, The advance angle adjusting device is configured such that when the torque from the single-phase AC power source to the motor is interrupted, the regenerative current regenerated from the motor becomes a value within a predetermined range by the advance angle adjustment.
  • the figure which shows schematic structure of the motor inverter apparatus of Embodiment 3 which concerns on this invention in a partial block (A) Waveform diagram showing an example of the voltage waveform Vac of the single-phase AC power supply, (b) Diagram showing the applied voltage Vdc to the inverter.
  • FIG. 1 A waveform diagram showing an example of the inverter applied voltage Vdc, (b) an example of the differential voltage (Vdc ⁇ ABS (Vac)) between the inverter applied voltage Vdc and the absolute value ABS (Vac) of the voltage of the single-phase AC power supply.
  • Waveform diagram A diagram showing a schematic configuration of a conventional motor inverter device. A part or all of the drawing is drawn by a schematic expression for the purpose of illustration, and the actual relative size and position of the elements shown therein are not necessarily faithful. Please consider that this is not always the case.
  • the motor inverter device includes: A rectifier circuit with a single-phase AC power supply as input, An inverter that converts the output DC power of the rectifier circuit into AC power; A control unit for PWM driving control of the inverter; A resonance frequency is set to 40 times or more of the frequency of the single-phase AC power source, and a reactor arranged on a connection line from the single-phase AC power source to the inverter and a capacitor connected in parallel to the input side of the inverter A configured smoothing section; A motor that is driven and controlled by the inverter and is a permanent magnet motor including reluctance torque in output torque; An advance angle adjusting device for adjusting the phase of the PWM control signal output from the control unit, The advance angle adjusting device is configured such that when the torque from the single-phase AC power source to the motor is interrupted, the regenerative current regenerated from the motor becomes a value within a predetermined range by the advance angle adjustment.
  • the motor inverter device configured as described above can suppress the period during which the supply torque from the single-phase AC power supply to the motor is cut off. That is, an increase in motor current due to intermittent torque supply can be suppressed and motor loss can be suppressed.
  • by suppressing the regenerative current by utilizing the reluctance torque it is possible to suppress the charging / discharging of the capacitor due to the regenerative current that does not contribute to the motor drive. It is possible to suppress a decrease in system efficiency.
  • the advance angle adjusting device includes: A current detector for detecting the inverter bus current; A rotation speed estimation calculation unit that estimates and calculates a motor rotation speed based on a detection value of the current detection unit; A torque command calculation unit that calculates a torque command value required to drive the motor at the indicated rotation number based on an instruction rotation number for the motor and an estimated rotation number estimated by the rotation number estimation calculation unit; A voltage phase detector for detecting the voltage phase of the single-phase AC power source or the inverter applied voltage; An advance angle adjustment unit that performs advance angle adjustment based on information from the current detection unit, the torque command calculation unit, and the voltage phase detection unit, The advance angle adjustment unit has a period during which a charging current flows from the motor to the capacitor based on a detection value of the current detection unit (regeneration period; torque cutoff period) at an arbitrary motor speed.
  • the torque command value calculated by the torque command calculation unit is set to be substantially the minimum while being set to be less than
  • an inverter based on the regenerative current generated by the influence of the permanent magnet while securing the torque necessary for driving the motor in addition to the magnet torque and the reluctance torque
  • the advance angle adjusting device includes A current detector for detecting the inverter bus current; A rotation speed estimation calculation unit that estimates and calculates a motor rotation speed based on a detection value of the current detection unit; A torque command calculation unit that calculates a torque command value required to drive the motor at the indicated rotation number based on an instruction rotation number for the motor and an estimated rotation number estimated by the rotation number estimation calculation unit; A voltage phase detector for detecting the voltage phase of the single-phase AC power source or the inverter applied voltage; An advance angle adjustment unit that performs advance angle adjustment based on information from the current detection unit, the torque command calculation unit, and the voltage phase detection unit, The advance adjustment unit is configured such that an average current value of a charging current flowing from the motor to the capacitor at an arbitrary motor rotation number is a product of a capacitance of the capacitor and an effective voltage value of the single-phase AC power source.
  • the torque command value calculated by the torque command calculation unit is adjusted to be substantially the minimum while
  • an inverter based on the regenerative current generated by the influence of the permanent magnet while securing the torque necessary for driving the motor in addition to the magnet torque by the reluctance torque
  • the advance angle adjusting device includes A current detector for detecting the inverter bus current; A rotation speed estimation calculation unit that estimates and calculates a motor rotation speed based on a detection value of the current detection unit; A torque command calculation unit that calculates a torque command value required to drive the motor at the indicated rotation number based on an instruction rotation number for the motor and an estimated rotation number estimated by the rotation number estimation calculation unit; A voltage phase detector for detecting the voltage phase of the single-phase AC power source 1 or the inverter applied voltage; A DC voltage detector for detecting a DC voltage applied to the inverter; An advance angle adjustment unit that adjusts an advance angle based on information from the torque command calculation unit and the voltage phase detection unit, The advance angle adjustment unit is set so that an average voltage value detected by the DC voltage detection unit is less than an effective voltage value of the single-phase AC power supply at an arbitrary motor rotation speed, and the torque command calculation unit The torque command value calculated by is adjusted so as to be substantially minimum.
  • an inverter based on the regenerative current generated by the influence of the permanent magnet while securing the torque necessary for driving the motor in addition to the magnet torque by the reluctance torque
  • the advance angle adjusting device includes A current detector for detecting the inverter bus current; A rotation speed estimation calculation unit that estimates and calculates a motor rotation speed based on a detection value of the current detection unit; A torque command calculation unit that calculates a torque command value required to drive the motor at the indicated rotation number based on an instruction rotation number for the motor and an estimated rotation number estimated by the rotation number estimation calculation unit; A voltage phase detector for detecting the voltage phase of the single-phase AC power source or the inverter applied voltage; A DC voltage detector for detecting a DC voltage applied to the inverter; An AC voltage detector for detecting the voltage of the single-phase AC power supply; An advance angle adjustment unit that performs advance angle adjustment based on information from the torque command calculation unit, the voltage phase detection unit, the DC voltage detection unit, and the AC voltage detection unit, The advance adjustment device is configured to calculate a DC voltage value applied to an inverter detected by the DC voltage detection unit and a voltage value of the single
  • an inverter based on the regenerative current generated by the influence of the permanent magnet while securing the torque necessary for driving the motor in addition to the magnet torque and the reluctance torque
  • the advance angle adjusting device includes A current detector for detecting the inverter bus current; A rotation speed estimation calculation unit that estimates and calculates a motor rotation speed based on a detection value of the current detection unit; A torque command calculation unit that calculates a torque command value required to drive the motor at the indicated rotation number based on an instruction rotation number for the motor and an estimated rotation number estimated by the rotation number estimation calculation unit; A voltage phase detector for detecting the voltage phase of the single-phase AC power source or the inverter applied voltage; A DC voltage detector for detecting a DC voltage applied to the inverter; An AC voltage detector for detecting the voltage of the single-phase AC power supply; An advance angle adjustment unit that performs advance angle adjustment based on information from the torque command calculation unit, the voltage phase detection unit, the DC voltage detection unit, and the AC voltage detection unit, The advance angle adjustment unit is configured to obtain a voltage value of the single-phase AC power source detected by the AC voltage detection unit as a DC voltage value
  • an inverter based on the regenerative current generated by the influence of the permanent magnet while securing the torque necessary for driving the motor in addition to the magnet torque by the reluctance torque
  • the advance angle adjusting device is the advance angle adjusting device is the single-phase AC power source or the inverter applied voltage.
  • the adjustment advance angle amount is changed based on the voltage phase.
  • the regenerative current is effectively suppressed, the circuit loss in the inverter and the capacitor is suppressed, the torque interruption period is short, and the efficiency reduction is suppressed.
  • the motor can be driven.
  • the motor according to the first to seventh aspects is for driving a compressor provided in an air conditioner.
  • the motor inverter device for driving a compressor provided in the air conditioner is used to achieve a small size, light weight, low cost, It is resource-saving and can reduce power consumption throughout the year.
  • a motor inverter device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
  • the present invention is not limited by the specific configuration of the embodiment described below, and is a motor configured based on the technical idea equivalent to the technical idea described in the following embodiment. It includes an inverter device.
  • FIG. 1 is a block diagram showing a schematic configuration of a motor inverter device according to a first embodiment of the present invention.
  • the motor inverter device according to the first embodiment includes a rectifier circuit 2 including a diode bridge that receives a single-phase AC power supply 1 and converts the output DC power of the rectifier circuit 2 into AC power.
  • An inverter 4 composed of a plurality of semiconductor switching elements, a control unit 6 such as a microcomputer for controlling the inverter 4 by PWM drive, and a smoothing unit 7 whose resonance frequency is set to 40 times or more of the frequency of the single-phase AC power supply 1
  • an advance adjustment device 80 that adjusts the phase of the PWM control signal from the control unit 6.
  • the smoothing unit 7 includes a reactor 7a disposed on the line of the inverter 4 and the single-phase AC power supply 1, and a capacitor 7b connected in parallel to the input side of the inverter 4. ing.
  • the motor 3 as a load is driven and controlled by the driving power from the inverter 4.
  • the rectifier circuit 2 is a full-wave rectifier circuit.
  • the motor inverter device is configured by using a smoothing unit 7 having a resonance frequency set to 40 times or more of the frequency of the single-phase AC power supply 1 using the single-phase AC power supply 1 as an input power supply.
  • the pulsating voltage obtained by full-wave rectification of the input of the single-phase AC power supply 1 is switched by performing the minimum smoothing by the smoothing unit 7 having a small capacity.
  • AC power having a desired frequency for driving the motor is formed.
  • the motor inverter device of the first embodiment is configured such that electric power is intermittently supplied to the motor 3.
  • the regenerative current is suppressed so as to be within a predetermined range, and the motor 3 driven under specified conditions within the range.
  • the advance angle adjustment is performed so that a torque command value (Trq *), which will be described later, required in step S1 becomes substantially minimum.
  • the operation and action of the motor inverter device of the first embodiment configured as described above will be described.
  • a power supply having a frequency of 50 Hz is used for the single-phase AC power supply 1
  • the capacitance L1 of the reactor 7a and the capacitance C1 of the capacitor 7b constituting the smoothing unit 7 are resonant to improve the power harmonic current characteristics.
  • the frequency fc 1 / (2 ⁇ ⁇ ⁇ (L1 ⁇ C1)) is set to be 40 times or more of the single-phase AC power supply frequency, that is, 2000 Hz or more.
  • the reactor 7a and the capacitor 7b constituting the smoothing unit 7 are set to the above values, when the permanent magnet motor is driven by the inverter 4, the inverter applied voltage waveform Vdc, the input current waveform Iac, and the inverter bus current waveform Iinv Is as shown below.
  • FIG. 2 is a diagram showing a schematic configuration of the motor inverter device.
  • an inverter applied voltage waveform Vdc an input current waveform Iac
  • an inverter bus current waveform Iinv are shown.
  • FIG. 3 shows respective waveforms of the inverter applied voltage waveform Vdc (FIG. 3A), the input current waveform Iac (FIG. 3B), and the inverter bus current waveform Iinv (FIG. 3C).
  • FIG. 3A shows respective waveforms of the inverter applied voltage waveform Vdc
  • FIG. 3B the input current waveform Iac
  • Iinv FIG. 3C
  • the half cycle of the single-phase AC power supply 1 is T
  • Ton the period during which torque is supplied from the single-phase AC power supply 1 to the motor 3
  • Ton torque supply period
  • Toff torque interruption period
  • Tr charge period
  • Td discharge period
  • FIG. 4 shows a state in which a current flows in the “powering state” in the motor inverter device (FIG. 4A) and a state in which a current flows in the “regenerative state” (FIG. 4B).
  • a state in which torque is supplied from the single-phase AC power source 1 to the motor 3 in the “powering state” shown in FIG. 4A (torque supply period Ton in FIG. 3)
  • the state in which the motor 3 acts as a generator in the “regenerative state” shown in FIG. 4B and charges and discharges the capacitor 7b by the regenerative current generated from the motor 3 (charging period Tr in FIG. 3) It is repeated every half cycle of the single-phase AC power source 1.
  • the ratio between the “power running state” and the “regenerative state” depends on the magnitude relationship between the induced voltage of the motor 3 and the applied voltage of the inverter 4, the specifications of the single-phase AC power supply 1 and the motor 3, the motor speed by inverter control, And the advance angle setting state.
  • the charging operation to the capacitor 7b by the regenerative current moves waste power energy that does not contribute to the motor drive from the motor 3 to the capacitor 7b through the inverter 4. For this reason, when the regenerative current increases, the circuit loss (converter loss, inverter loss) in each of the capacitor (converter) 7b and the inverter 4 also increases.
  • the regenerative current greatly affects the converter loss, inverter loss, and motor loss, it is particularly important to suppress the regenerative current within a predetermined range in order to achieve loss suppression of the entire system. It is a problem.
  • the regenerative current regenerated from the motor 3 generated when the advance angle adjusting device 80 interrupts the torque from the single-phase AC power supply 1 to the motor 3 is an advance angle which will be described later. It is configured to be a value within a predetermined range by the adjustment process.
  • the influence on the loss due to the regenerative current when the motor is driven includes the torque supply period Ton where torque is supplied from the single-phase AC power supply 1 to the motor 3 and the torque cutoff period where torque from the single-phase AC power supply 1 to the motor 3 is cut off. Depends on the ratio to Toff.
  • the advance angle adjusting device 80 detects the torque interruption period Toff, which is the charging period Tr and the discharge period Td, and the torque supply period Ton during which torque is supplied from the single-phase AC power supply 1 to the motor 3 to detect torque.
  • the advance angle ⁇ is adjusted so that the supply period Ton becomes longer than the torque cutoff period Toff.
  • the motor loss is further suppressed after the loss due to the regenerative current is suppressed as described above.
  • a permanent magnet motor that includes a reluctance torque in its output torque, for example, an IPM is used as the motor 3.
  • FIG. 5 is a graph showing the magnet torque ⁇ m, the reluctance torque ⁇ r, and the total combined output torque ⁇ t when the current phase angle ⁇ is changed while the current is constant.
  • the total combined output torque ⁇ t is maximum when the current phase is in the range of 0 ° ⁇ ⁇ 45 °, and is maximum in the minus direction in the range of 135 ° ⁇ ⁇ 180 °.
  • FIG. 6 shows an example of the relationship between the torque command value Trq * indicating the torque required to drive the motor 3 at the indicated rotational speed.
  • the vertical axis represents the torque command value Trq *
  • the horizontal axis represents the advance angle ⁇ adjusted by the advance angle adjusting device 80.
  • the torque command value Trq * indicates a torque required to drive the motor 3 at the instructed number of rotations (instructed number of rotations) based on the estimated number of rotations of the motor 3 estimated by the advance angle adjusting device 80.
  • advance angle adjusting device 80 in the motor inverter device of the first embodiment calculation is performed in advance angle adjusting device 80 in a state in which motor 3 is driven so that the estimated rotational speed of motor 3 is substantially equal to the indicated rotational speed.
  • the advance angle ⁇ is adjusted so that the torque command value Trq * is substantially minimized.
  • the advance angle ⁇ is set to ⁇ set where the torque command value Trq * indicates a substantially minimum value.
  • the advance angle ⁇ is adjusted so that the torque supply period Ton is longer than the torque cutoff period Toff.
  • the advance angle adjusting device 80 adjusts the advance angle ⁇ to ⁇ set (> ⁇ a) so that the torque command value Trq * is substantially minimized.
  • the motor inverter device of the first embodiment by providing the control unit 6 and the advance angle adjusting device 80, the motor loss is maintained while maintaining the motor output torque required for the motor 3 that is a load. In this way, the motor inverter device is highly efficient with the loss of each part including the above being suppressed.
  • the motor inverter device according to the second embodiment more specifically shows the configuration of the advance angle adjusting device 80 in the motor inverter device according to the first embodiment.
  • components having substantially the same functions, configurations, and operations as those in the motor inverter device according to the first embodiment are denoted by the same reference numerals, and the descriptions thereof are the same as those in the first embodiment. Apply the description.
  • FIG. 7 is a partial block diagram showing a schematic configuration of the motor inverter device according to the second embodiment of the present invention.
  • the motor inverter device according to the second embodiment is similar to the motor inverter device according to the first embodiment described above, and includes a rectifier circuit 2 including a diode bridge that receives a single-phase AC power supply 1.
  • An inverter 4 composed of a plurality of semiconductor switch elements that convert the output DC power of the rectifier circuit 2 into AC power, a control unit 6 such as a microcomputer that controls the PWM drive of the inverter 4, and a resonance frequency of a single-phase AC power source 1 is provided with a smoothing unit 7 set to 40 times the frequency of 1 and an advance adjustment device 80 that performs advance adjustment.
  • the advance angle adjusting device 80 includes an advance angle adjusting device 8 that adjusts the phase of the PWM control signal from the control unit 6, a current detection unit 9 that detects the inverter bus current, A rotation speed estimation calculation unit 10 that estimates and calculates the motor rotation speed based on the detection value of the detection unit 9, and drives the motor 3 at the specified rotation speed based on the estimated rotation speed and the estimated rotation speed estimated by the rotation speed estimation calculation unit 10.
  • a torque command calculation unit 11 for calculating a torque command value necessary for the operation, and a voltage phase detection unit 12 for detecting the voltage phase of the single-phase AC power supply voltage 1 or the inverter applied voltage.
  • the motor inverter device of the second embodiment a method for adjusting the advance angle ⁇ in the advance angle adjusting device 80 for suppressing the regenerative current within a predetermined range will be described.
  • the effects on the loss due to the regenerative current when the motor is driven are the torque supply period Ton where torque is supplied from the single-phase AC power supply 1 to the motor 3 and the torque cutoff period Toff where the torque from the single-phase AC power supply 1 to the motor 3 is cut off. And depends on the ratio.
  • These periods (Ton, Toff) are periods in which the sign of the current value Iinv detected by the current detector 9 that detects the bus current of the inverter 4 is negative, that is, the charging period Tr in which the capacitor 7b is charged by the regenerative current. Can be estimated.
  • the advance angle adjustment unit 8 adjusts the advance angle ⁇ so that the charging period Tr in which the capacitor 7b is charged by the regenerative current is less than at least a quarter of the half cycle (T / 2) of the single-phase AC power supply 1. (T / 2> 4 (Tr)).
  • the motor loss suppression operation is further performed after the loss due to the regenerative current is suppressed as described above.
  • a permanent magnet motor for example, an IPM, that includes a reluctance torque in its output torque is used as the motor 3.
  • the torque characteristics in the permanent magnet motor including the reluctance torque have been described in the first embodiment.
  • the motor 3 which is a permanent magnet motor including reluctance torque has torque characteristics as shown in FIG. 5, when the motor 3 is driven at a predetermined load and rotation speed, it is adjusted by the advance angle adjustment unit 8.
  • the relationship between the advance angle ⁇ and the torque command value Trq * calculated by the torque command calculation unit 11 is as shown in FIG.
  • the advance angle adjustment unit 8 is a torque command value Trq calculated by the torque command calculation unit 11.
  • the advance angle ⁇ is adjusted to ⁇ set (> ⁇ a) so that * becomes substantially minimum.
  • the advance angle ⁇ is adjusted by the advance angle adjusting unit 8 regardless of the power phase ⁇ of the single-phase AC power source 1 detected by the voltage phase detecting unit 12. You may adjust so that you may change.
  • 8A shows an example of the waveform of the inverter applied voltage Vdc that is in phase with the power supply phase ⁇ of the single-phase AC power supply 1
  • FIG. 8B shows the adjusted advance value ( ⁇ ). It is a figure which shows the example of a state.
  • the advance angle ⁇ adjusted by the advance angle adjusting unit 8 is a constant advance value regardless of the power supply phase ⁇ of the single-phase AC power supply 1, as indicated by the adjustment advance value ⁇ 1 in FIG. You may adjust so that it may become.
  • the adjustment advance angle value ⁇ ( ⁇ ) may be changed by changing the adjustment width (advance angle ⁇ 2 ⁇ phase ⁇ a) of the adjustment advance angle ⁇ in accordance with the power supply phase ⁇ .
  • the adjustment advance value ⁇ 1 that is constant regardless of the power supply phase ⁇ of the single-phase AC power supply 1 detected by the voltage phase detection unit 12, and the power supply phase of the single-phase AC power supply 1 detected by the voltage phase detection unit 12 It may be a combined value of the adjustment advance value ⁇ 2 that increases or decreases according to ⁇ and the adjustment advance value ⁇ ( ⁇ ) that pulsates with the adjustment width phase value ⁇ a.
  • the above advance angle adjustment method ( ⁇ ( ⁇ )) is effective. Works.
  • the motor inverter device of the second embodiment by providing the control unit 6 and the advance angle adjusting device 80, the motor loss is maintained while maintaining the motor output torque required for the motor 3 as a load. In this way, the motor inverter device is highly efficient with the loss of each part including the above being suppressed.
  • the motor inverter device according to the third embodiment more specifically shows the configuration of the advance angle adjusting device 80 in the motor inverter device according to the first embodiment.
  • components having substantially the same functions, configurations, and operations as those in the motor inverter devices according to the first and second embodiments are denoted by the same reference numerals, and the description thereof will be omitted.
  • the description of Embodiment 1 and Embodiment 2 is applied.
  • FIG. 9 is a block diagram showing a schematic configuration of the motor inverter device according to the third embodiment of the present invention.
  • the motor inverter device according to the third embodiment is similar to the motor inverter device according to the first embodiment described above, and includes a rectifier circuit 2 including a diode bridge that receives a single-phase AC power supply 1.
  • An inverter 4 composed of a plurality of semiconductor switch elements that convert the output DC power of the rectifier circuit 2 into AC power, a control unit 6 such as a microcomputer that controls the PWM drive of the inverter 4, and a resonance frequency of a single-phase AC power source 1 is provided with a smoothing unit 7 set to 40 times the frequency of 1 and an advance adjustment device 80 that performs advance adjustment.
  • the advance angle adjusting device 80 includes an advance angle adjusting device 8 that adjusts the phase of the PWM control signal from the control unit 6, a current detection unit 9 that detects the inverter bus current, A rotation speed estimation calculation unit 10 that estimates and calculates the motor rotation speed based on the detection value of the detection unit 9, and drives the motor 3 at the specified rotation speed based on the estimated rotation speed and the estimated rotation speed estimated by the rotation speed estimation calculation unit 10.
  • a torque command calculation unit 11 for calculating a torque command value necessary for the operation, a voltage phase detection unit 12 for detecting the voltage phase of the single-phase AC power supply voltage 1 or the inverter applied voltage, and a DC voltage applied to the inverter 4.
  • DC voltage detecting means 13 for detecting.
  • the motor 3 a permanent magnet motor that includes a reluctance torque in its output torque, for example, an IPM is used.
  • the influence on the loss due to the regenerative current at the time of driving the motor also depends on the current amount of the regenerative current, that is, the amount of charge charged in the capacitor 7b every half cycle T of the single-phase AC power supply 1. This amount of charge can be estimated from the capacitance C of the capacitor 7b and the average value Vdc (av) of the DC voltage value Vdc detected by the DC voltage detector 13 that detects the voltage applied to the inverter 4.
  • FIG. 10A is a waveform diagram showing an example of the voltage waveform Vac of the single-phase AC power supply 1
  • FIG. 10B shows the voltage Vdc applied to the inverter.
  • the applied DC voltage waveform Vdc is an absolute value waveform as shown in FIG. Therefore, the average voltage value Vdc (av) is (2 ⁇ 2 * Ve) / ⁇ , which is approximately 90% of the effective voltage value Ve.
  • the voltage waveform Vdc applied to the inverter 4 is different from the sinusoidal waveform as shown in FIG. Becomes a deformed waveform.
  • the inventor at least increases the average voltage value Vdc (av) detected by the DC voltage detector 13 by approximately 10% of (2 ⁇ 2 * Ve) / ⁇ . It has been found that it needs to be less than, that is, substantially less than the effective voltage value Ve. Therefore, the average voltage value Vdc (av) (1) of the inverter applied voltage Vdc considering the charging voltage to the capacitor by the regenerative current shown in FIG. 3A is less than the substantially effective voltage value Ve of the single-phase AC power supply 1 ( The advance angle ⁇ is adjusted by the advance angle adjustment unit 8 so that Vdc (av) (1) ⁇ Ve).
  • limiting the average voltage value Vav by charging the capacitor C of the capacitor C with the regenerative current to be less than about 10% of the effective voltage value Ve of the single-phase AC power supply 1 is a current detection for detecting the bus current of the inverter 4.
  • the product of the capacitor C and the effective voltage value Ve of the single-phase AC power supply 1 is 10 times the single-phase AC power supply half cycle T.
  • the average current value Iinv (av) in which the sign of the current value Iinv detected by the unit 9 is negative. (Iinv (av) ⁇ (C * Ve / 10T)). Therefore, the advance angle ⁇ is adjusted by the advance angle adjusting unit 8 so that Iinv (av) ⁇ (C * Ve / 10T).
  • the loss due to the regenerative current is suppressed as described above, and the motor loss suppressing operation described in the second embodiment is further performed.
  • the motor inverter device of the third embodiment by providing the control unit 6 and the advance angle adjusting device 80, the motor loss is maintained while maintaining the motor output torque required for the motor 3 as a load. In this way, the motor inverter device is highly efficient with the loss of each part including the above being suppressed.
  • the motor inverter device of the fourth embodiment more specifically shows the configuration of the advance angle adjusting device 80 in the motor inverter device of the first embodiment.
  • components having substantially the same functions, configurations, and operations as those in the motor inverter device according to the first to third embodiments are denoted by the same reference numerals, and the description thereof will be omitted.
  • the description of Embodiment 1 to Embodiment 3 is applied.
  • FIG. 11 is a partial block diagram showing the schematic configuration of the motor inverter device according to the fourth embodiment of the present invention.
  • the motor inverter device according to the fourth embodiment is similar to the motor inverter device according to the first embodiment described above, and includes a rectifier circuit 2 including a diode bridge that receives a single-phase AC power supply 1 as an input.
  • An inverter 4 composed of a plurality of semiconductor switch elements that convert the output DC power of the rectifier circuit 2 into AC power, a control unit 6 such as a microcomputer that controls the PWM drive of the inverter 4, and a resonance frequency of a single-phase AC power source 1 is provided with a smoothing unit 7 set to 40 times the frequency of 1 and an advance adjustment device 80 that performs advance adjustment.
  • the advance angle adjusting device 80 includes an advance angle adjusting device 8 that adjusts the phase of the PWM control signal from the control unit 6, a current detection unit 9 that detects the inverter bus current, A rotation speed estimation calculation unit 10 that estimates and calculates the motor rotation speed based on the detection value of the detection unit 9, and drives the motor 3 at the specified rotation speed based on the estimated rotation speed and the estimated rotation speed estimated by the rotation speed estimation calculation unit 10.
  • a torque command calculation unit 11 for calculating a torque command value necessary for the operation, a voltage phase detection unit 12 for detecting the voltage phase of the single-phase AC power supply voltage 1 or the inverter applied voltage, and a DC voltage applied to the inverter 4.
  • DC voltage detecting means 13 for detecting and AC voltage detecting means 14 for detecting a single-phase AC power supply voltage are provided.
  • a permanent magnet motor that includes a reluctance torque in its output torque, for example, an IPM is used as the motor 3.
  • the motor inverter device of the fourth embodiment a method for adjusting the advance angle ⁇ in the advance angle adjusting device 80 for suppressing the regenerative current within a predetermined range will be described.
  • the effects on the loss due to the regenerative current when the motor is driven are the torque supply period Ton where torque is supplied from the single-phase AC power supply 1 to the motor 3 and the torque cutoff period Toff where the torque from the single-phase AC power supply 1 to the motor 3 is cut off. And depends on the ratio.
  • the torque from the single-phase AC power supply 1 to the motor 3 is interrupted at least during the torque supply period Ton during which torque is supplied from the single-phase AC power supply 1 to the motor 3.
  • the advance angle ⁇ is set by the advance angle adjustment unit 8 so that the torque cutoff period Toff is longer (Ton> Toff), that is, the period in which Vdc> ABS (Vac) is less than half of the half cycle T of the single-phase AC power supply 1. adjust.
  • the influence on the loss due to the regenerative current when the motor is driven is charged to the capacitor 7b for each regenerative current amount, that is, every half cycle T of the single-phase AC power supply 1. It also depends on the amount of charge. This amount of charge can be estimated from the capacitance C of the capacitor 7b and the average value Vdc (av) of the DC voltage value Vdc detected by the DC voltage detector 13 that detects the voltage applied to the inverter 4.
  • the amount of charge charged in the capacitor 7b by the regenerative current can be estimated by another means.
  • the amount of charge charged in the capacitor 7b is determined by the capacitance C of the capacitor 7b, the DC voltage value Vdc detected by the DC voltage detector 13 that detects the voltage applied to the inverter 4, and the voltage of the single-phase AC power source 1. It can be estimated from the differential voltage value with the absolute value ABS (Vac) of the AC voltage detected by the AC voltage detection unit 14 to be detected.
  • FIG. 12A is a waveform diagram showing an example of the inverter applied voltage Vdc in consideration of the charging voltage to the capacitor 7b due to the regenerative current.
  • FIG. 12B shows the waveform of the inverter applied voltage Vdc and the single-phase AC power source 1. It is a wave form diagram which shows the example of the difference voltage (Vdc-ABS (Vac)) with the absolute value ABS (Vac) of a voltage.
  • the advance angle ⁇ is adjusted by the advance angle adjustment unit 8 so that the voltage value Ve is less than approximately 10% (10 * Vav (1) ⁇ Ve).
  • the average value Vav (1) is an exemplary calculation.
  • the motor loss suppression operation described in the above-described second embodiment is further performed after the loss due to the regenerative current is suppressed as described above.
  • the motor inverter device of the fourth embodiment by providing the control unit 6 and the advance angle adjusting device 80, the motor loss is maintained while maintaining the motor output torque required for the motor 3 as a load. In this way, the motor inverter device is highly efficient with the loss of each part including the above being suppressed.
  • the method of adjusting the advance angle in inverter control has been described for reducing the loss of the entire motor inverter device by suppressing the regenerative current.
  • the induced voltage, magnet torque, and reluctance torque in the motor have been described. It is also important to adjust the motor specifications to be used, such as the ratio, in advance.
  • the various advance angle adjustment methods in the advance angle adjustment device 80 described in each embodiment can be used in appropriate combination, and by providing a plurality of advance angle adjustment methods, the advance in the motor inverter device of the present invention can be achieved.
  • the angle adjustment can be made more reliable.
  • a permanent magnet motor including a reluctance torque in the output torque is used as the motor.
  • the advance angle adjustment device performs various advance angle adjustments shown below to maintain the motor output torque required in the motor inverter device, while maintaining the motor loss. It is possible to perform highly efficient drive control on the motor that is a load, which can suppress the loss of each part including the above.
  • the advance angle adjusting device in the present invention at an arbitrary motor rotational speed, (1) Advancing adjustment in which the charging period (Tr) in which the charging current flows from the motor to the capacitor based on the detection value of the current detection unit is less than about a quarter of the half cycle (T / 2) of the single-phase AC power supply Processing; T / 2> 4Tr: or (2)
  • the average regenerative current value (Iinv (av)) based on the detection value of the current detection unit is the product of the capacitor capacity (C) and the effective voltage value (Ve) of the single-phase AC power supply.
  • Advance angle adjustment processing to be less than a value divided by 10 times the half cycle (T / 2); Iinv (av) ⁇ (C * Ve / 10T): (3) Lead angle adjustment processing in which the average voltage value detected by the DC voltage detection unit is less than the effective voltage value of the single-phase AC power supply; (Vdc (av) ⁇ Ve): or (4) Detection by the DC voltage detection unit
  • the average voltage value calculated by the difference between the DC voltage value applied to the inverter and the absolute value calculated based on the voltage value of the single-phase AC power source detected by the AC voltage detector is a single-phase AC power source.
  • the advance angle adjustment is performed so that the torque command value (Trq *), which is the required torque, is substantially minimized on the condition that the at least one advance angle adjustment process is performed.
  • the motor inverter device of the present invention by using a reluctance torque motor capable of suppressing the regenerative current without reducing the motor output torque, the sum of converter loss, inverter loss, and motor loss is obtained. It is possible to suppress an increase in system loss. That is, the motor inverter device of the present invention can suppress a decrease in efficiency due to the regenerative current.
  • the reluctance torque motor to adjust the advance angle so as to realize the regenerative current suppression and the motor output torque maximization, it is possible to realize a system that most suppresses the reduction in the efficiency of the entire motor inverter device. .
  • the present invention it is possible to suppress the influence of the regenerative current while maintaining the required maximum torque, and in particular, it is possible to improve the efficiency in the low-speed rotation speed region where the influence of the regenerative current is small. It is a highly versatile device that can be applied to the compressor motor drive of air conditioners and refrigerators that are used in such a way that the motor drive at a low rotation speed occupies most of the operation period although the change width is large. is there.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

La présente invention a trait à un dispositif onduleur de moteur qui est équipé : d'un circuit de redressement à deux alternances (2) qui utilise une source de courant alternatif monophasé pour l'entrée ; d'un onduleur (4) permettant de convertir la puissance en courant continu en puissance en courant alternatif ; d'une unité de commande permettant d'entraîner l'onduleur au moyen d'une modulation d'impulsions en durée ; d'un filtre de lissage (7) qui est doté d'une fréquence de résonance qui est définie de manière à être quarante fois supérieure ou plus à la fréquence de la source de courant alternatif monophasé et qui est constitué d'une bobine de réactance et d'un condensateur ; et d'un moteur (3) qui est un moteur à aimant permanent qui inclut un couple de réluctance dans un couple de sortie. Une unité d'ajustement d'avance temporelle (80), qui ajuste la phase d'une sortie de signal de commande de modulation d'impulsions en durée provenant de l'unité de commande, est réglée de sorte qu'un courant de régénération provenant du moteur prend une valeur à l'intérieur d'une plage prédéterminée en conséquence de l'ajustement d'avance temporelle.
PCT/JP2012/008233 2011-12-27 2012-12-25 Dispositif onduleur de moteur WO2013099203A1 (fr)

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CN105974308A (zh) * 2015-03-13 2016-09-28 财团法人工业技术研究院 用于马达变频器的马达效率分析方法
WO2022186438A1 (fr) * 2021-03-03 2022-09-09 엘지전자 주식회사 Circuit onduleur et son procédé de commande
WO2023095542A1 (fr) * 2021-11-26 2023-06-01 ヌヴォトンテクノロジージャパン株式会社 Dispositif d'entraînement de moteur

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EP3460989A4 (fr) * 2016-05-17 2020-01-22 Microspace Corporation Dispositif de commande d'entraînement de moteur et dispositif électrique
CN112583324A (zh) * 2016-09-13 2021-03-30 日立环球生活方案株式会社 振动控制装置及洗衣机
CN110492822B (zh) * 2019-08-22 2022-09-16 青岛海尔空调电子有限公司 变频空调器及其弱磁控制限制电压设定方法和控制方法
CN112787553A (zh) * 2019-11-06 2021-05-11 美的威灵电机技术（上海）有限公司 破壁机及其控制系统

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KR20150145801A (ko) * 2014-06-19 2015-12-31 삼성전자주식회사 모터 구동장치 및 그 제어방법
CN105974308A (zh) * 2015-03-13 2016-09-28 财团法人工业技术研究院 用于马达变频器的马达效率分析方法
CN105974308B (zh) * 2015-03-13 2018-12-14 财团法人工业技术研究院 用于马达变频器的马达效率分析方法
WO2022186438A1 (fr) * 2021-03-03 2022-09-09 엘지전자 주식회사 Circuit onduleur et son procédé de commande
WO2023095542A1 (fr) * 2021-11-26 2023-06-01 ヌヴォトンテクノロジージャパン株式会社 Dispositif d'entraînement de moteur

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JPWO2013099203A1 (ja) 2015-04-30

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