WO2019239628A1 - Convertisseur et dispositif de commande de moteur - Google Patents

Convertisseur et dispositif de commande de moteur Download PDF

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Publication number
WO2019239628A1
WO2019239628A1 PCT/JP2019/003034 JP2019003034W WO2019239628A1 WO 2019239628 A1 WO2019239628 A1 WO 2019239628A1 JP 2019003034 W JP2019003034 W JP 2019003034W WO 2019239628 A1 WO2019239628 A1 WO 2019239628A1
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WIPO (PCT)
Prior art keywords
voltage
motor
phase
converter
detection unit
Prior art date
Application number
PCT/JP2019/003034
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English (en)
Japanese (ja)
Inventor
良知 林
聡 小塚
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to CN201980037731.4A priority Critical patent/CN112219348A/zh
Priority to JP2019528930A priority patent/JP6608096B1/ja
Priority to TW108119130A priority patent/TWI705647B/zh
Publication of WO2019239628A1 publication Critical patent/WO2019239628A1/fr

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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
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • converters using a power regeneration system that returns regenerative power to an AC power source as an input power source are often used for energy saving.
  • the converter using the power regeneration system operates as a DC / AC converter that converts DC power supplied from the motor drive device to AC power during motor regeneration, thereby converting the regenerative power generated by the motor into AC. Return to power.
  • the operation of the converter that returns the regenerative power to the AC power supply is referred to as a regenerative operation.
  • the regenerative operation if the timing at which the switching elements constituting the converter are turned on deviates from the voltage phase of the AC power supply, the voltage difference increases, and an excessive current may flow to stop the motor drive device.
  • Patent Document 1 discloses a technique for detecting the voltage phase of the AC power supply by the zero crossing of the phase voltage.
  • a phase detection unit that detects the voltage phase of the AC power supply is connected to the AC terminal of the power regeneration converter, and the voltage phase of the AC power supply is detected by the phase detection unit.
  • the phase detector is mounted on a printed circuit board provided in the power regeneration converter. According to the technique disclosed in Patent Literature 1, since the voltage phase of the AC power supply is detected by the zero cross of the phase voltage, a phase detection signal that alternately changes between a high level and a low level between the zero cross points is generated. .
  • a harness is connected to the bus bar, for example, in order to detect the phase of the AC voltage in the phase detection unit provided on the printed circuit board.
  • the phase detector detects the AC voltage phase via the harness, there is a problem that the structure becomes complicated.
  • a converter according to the present invention is disposed between an AC power source that is an input power source and a motor driving device that performs variable speed control of the motor, and supplies DC power to the motor driving device.
  • a converter having a power regeneration function for supplying regenerative power when the motor decelerates to an AC power supply an AC terminal connected to the AC power supply, a first terminal connected to a high potential side DC wiring, and a low potential
  • a power module having a plurality of switching elements and a drive circuit for driving each of the plurality of switching elements.
  • the converter according to the present invention has an effect that the voltage phase of the AC power supply can be detected with a simple configuration.
  • FIG. 24 is a waveform diagram showing the behavior when the motor driving device shown in FIG. 24 operates the motor.
  • the figure which shows the structural example of the overload detection part shown in FIG. The figure which shows the structure of the converter and motor control apparatus which concern on Embodiment 6. Waveform diagram for explaining steady-state overload protection in the sixth embodiment The figure which shows the structural example of the overload detection part shown in FIG.
  • FIG. 10 shows a configuration example of a bus voltage determination circuit in the tenth embodiment.
  • FIG. 1 is a diagram illustrating a configuration of a converter and a motor control device according to the first embodiment.
  • converter 1-1 according to the first embodiment is provided between an AC power supply 3 that is a three-phase AC power supply that generates a three-phase AC voltage and a motor drive device 4.
  • the converter 1-1 converts the AC voltage from the AC power source 3 that generates a three-phase AC voltage during powering of the motor into a DC voltage and outputs the DC voltage to the motor driving device 4.
  • the motor driving device 4 receives the DC voltage supplied from the converter 1-1 and controls the motor 5 at a variable speed.
  • the motor control apparatus according to the first embodiment is an apparatus including a converter 1-1 and a motor driving device 4 that receives DC power from the converter 1-1 and controls the motor 5 at a variable speed.
  • the converter 1-1 includes a smoothing capacitor 21 that stores DC power, a power module 22, a bus voltage detector 23, a voltage phase detector 24, a bus current detector 25, and a base drive that is a drive signal generator.
  • the signal generation unit 26 includes a base drive circuit 27 that is a drive circuit, a regeneration control unit 28 that is a signal control unit, and a control power supply unit 29.
  • the power module 22 includes three AC terminals 11, 12, 13, a DC terminal 14 that is a first terminal to which a high potential side DC wiring is connected, and a second terminal to which a low potential side DC wiring is connected. A certain DC terminal 15 is provided.
  • the AC terminal 11 is connected to one end of the AC wiring 51.
  • the other end of the AC wiring 51 is connected to one end of the reactor 2-1.
  • the other end of the reactor 2-1 is connected to one end of an AC wiring 91.
  • the other end of the AC wiring 91 is connected to the terminal 3 ⁇ / b> R of the AC power supply 3.
  • the terminal 3R is a terminal to which an R-phase AC voltage that is a first phase is output. The R-phase AC voltage is applied to the AC terminal 11 via the reactor 2-1.
  • AC terminal 12 is connected to one end of AC wiring 52.
  • the other end of the AC wiring 52 is connected to one end of the reactor 2-2.
  • the other end of the reactor 2-2 is connected to one end of the AC wiring 92.
  • the other end of the AC wiring 92 is connected to the terminal 3 ⁇ / b> S of the AC power supply 3.
  • the terminal 3S is a terminal to which an S-phase AC voltage that is the second phase is output.
  • the S-phase AC voltage is applied to the AC terminal 12 via the reactor 2-2.
  • AC terminal 13 is connected to one end of AC wiring 53.
  • the other end of the AC wiring 53 is connected to one end of the reactor 2-3.
  • the other end of the reactor 2-3 is connected to one end of the AC wiring 93.
  • the other end of the AC wiring 93 is connected to the terminal 3T of the AC power source 3.
  • the terminal 3T is a terminal to which a T-phase AC voltage that is a third phase is output.
  • the T-phase AC voltage is applied to the AC terminal 13 via the reactor 2-3.
  • the reactors 2-1, 2-2, and 2-3 may be referred to as a reactor 2 when they are not distinguished.
  • the DC terminal 14 is connected to one end of a positive electrode bus 70P which is a DC wiring on the high potential side.
  • the other end of positive bus 70P is connected to output terminal 6-1 of converter 1-1.
  • the output terminal 6-1 is a high potential side DC terminal.
  • One end of the positive electrode bus 71P is connected to the output terminal 6-1.
  • the positive bus 71P is a high potential side DC wiring provided between the converter 1-1 and the motor driving device 4.
  • the other end of the positive electrode bus 71 ⁇ / b> P is connected to the DC terminal 17 of the motor driving device 4.
  • the DC terminal 17 is a high potential side DC terminal.
  • the DC terminal 14 of the power module 22 is electrically connected to the DC terminal 17 of the motor driving device 4 via the positive electrode bus 70P, the output terminal 6-1 and the positive electrode bus 71P.
  • the DC terminal 15 is connected to one end of a negative electrode bus 70N which is a DC wiring on the low potential side.
  • the other end of the negative electrode bus 70N is connected to the output terminal 6-2 of the converter 1-1.
  • the output terminal 6-2 is a DC terminal on the low potential side.
  • One end of the negative electrode bus 71N is connected to the output terminal 6-2.
  • the negative electrode bus 71N is a low potential side DC wiring provided between the converter 1-1 and the motor driving device 4.
  • the other end of the negative electrode bus 71N is connected to the DC terminal 18 of the motor driving device 4.
  • the DC terminal 18 is a DC terminal on the low potential side.
  • the DC terminal 15 of the power module 22 is electrically connected to the DC terminal 18 of the motor driving device 4 through the negative electrode bus 70N, the output terminal 6-2, and the negative electrode bus 71N.
  • the terminal 21a on the high potential side of the smoothing capacitor 21 is connected to the positive electrode bus 70P.
  • Reference numeral 80P represents a connection point between the high potential side terminal 21a of the smoothing capacitor 21 and the positive electrode bus 70P.
  • the low potential side terminal 21b of the smoothing capacitor 21 is connected to the negative electrode bus 70N.
  • reference numeral 80N represents a connection point between the low potential side terminal 21b of the smoothing capacitor 21 and the negative electrode bus 70N.
  • the power module 22 includes six rectifying elements D 1, D 2, D 3, D 4, D 5, D 6 and 6 switching elements S 1, S 2 for regeneration. , S3, S4, S5, and S6.
  • the six rectifying elements D1, D2, D3, D4, D5, and D6 may be referred to as rectifying elements D1 to D6, and the switching elements S1, S2, S3, S4, S5, and S6 may be referred to as switching elements S1 to S6. is there.
  • the rectifying element D1 is connected in antiparallel to the switching element S1. Specifically, the cathode that is the cathode of the rectifying element D1 is connected to the collector of the switching element S1, and the anode that is the anode of the rectifying element D1 is connected to the emitter of the switching element S1.
  • the rectifying element D1 and the switching element S1 constitute one power element.
  • the rectifier element D2 and the switching element S2 constitute a power element
  • the rectifier element D3 and the switching element S3 constitute a power element
  • the rectifier element D4 and the switching element S4 constitute a power element
  • the rectifier element D5 and the switching element The power element is configured by the element S5, and the power element is configured by the rectifying element D6 and the switching element S6.
  • each of the rectifier elements D1 to D6 for example, a diode, a Schottky barrier diode, a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), or the like is used.
  • Each of the six rectifying elements D1, D2, D3, D4, D5, and D6 may be any element having a rectifying action, and is not limited to these elements.
  • Switching element S1 and switching element S2 are connected in series by wiring 8-1.
  • the switching element S1, the switching element S2, the rectifying element D1, the rectifying element D2, and the wiring 8-1 constitute a first arm.
  • One end of the wiring 8-1 is connected to the emitter of the switching element S1.
  • the other end of the wiring 8-1 is connected to the collector of the switching element S2.
  • One end of the wiring 9-1 is connected to the wiring 8-1.
  • Reference numeral 501 represents a connection point between the wiring 8-1 and the wiring 9-1.
  • the other end of the wiring 9-1 is connected to the AC terminal 11. Thereby, the emitter of the switching element S1 and the collector of the switching element S2 are electrically connected to the AC terminal 11.
  • the rectifying element D1 and the switching element S1 constitute a power element for an R-phase positive electrode
  • the rectifying element D2 and switching element S2 constitute a power element for an R-phase negative electrode.
  • the collector of the switching element S1 is connected to the DC terminal 14 via the wiring 9-4.
  • the emitter of the switching element S2 is connected to the DC terminal 15 via the wiring 9-5.
  • Switching element S3 and switching element S4 are connected in series by wiring 8-2.
  • Switching element S3, switching element S4, rectifying element D3, rectifying element D4, and wiring 8-2 constitute a second arm.
  • One end of the wiring 8-2 is connected to the emitter of the switching element S3.
  • the other end of the wiring 8-2 is connected to the collector of the switching element S4.
  • One end of the wiring 9-2 is connected to the wiring 8-2.
  • Reference numeral 502 represents a connection point between the wiring 8-2 and the wiring 9-2.
  • the other end of the wiring 9-2 is connected to the AC terminal 12.
  • the rectifying element D3 and the switching element S3 constitute a power element for the S-phase positive electrode, and the rectifying element D4 and switching element S4 constitute an S-phase negative power element.
  • the collector of the switching element S3 is connected to the DC terminal 14 via the wiring 9-4.
  • the emitter of the switching element S4 is connected to the DC terminal 15 through the wiring 9-5.
  • Switching element S5 and switching element S6 are connected in series by wiring 8-3.
  • Switching element S5, switching element S6, rectifying element D5, rectifying element D6 and wiring 8-3 constitute a third arm.
  • One end of the wiring 8-3 is connected to the emitter of the switching element S5.
  • the other end of the wiring 8-3 is connected to the collector of the switching element S6.
  • One end of the wiring 9-3 is connected to the wiring 8-3.
  • Reference numeral 503 represents a connection point between the wiring 8-3 and the wiring 9-2.
  • the other end of the wiring 9-3 is connected to the AC terminal 13. Thereby, the emitter of switching element S5 and the collector of switching element S6 are electrically connected to AC terminal 13.
  • the rectifying element D5 and the switching element S5 constitute a power element for a T-phase positive electrode, and the rectifying element D6 and switching element S6 constitute a T-phase negative power element.
  • the collector of the switching element S5 is connected to the DC terminal 14 via the wiring 9-4.
  • the emitter of the switching element S6 is connected to the DC terminal 15 via the wiring 9-5.
  • the DC terminal 14 is electrically connected to the collectors of the switching element S1, the switching element S3, and the switching element S5 that constitute the upper arm.
  • the DC terminal 15 is electrically connected to the emitters of the switching element S2, the switching element S4, and the switching element S6 constituting the lower arm.
  • the DC terminal 14 and the DC terminal 15 of the power module 22 are connected to a series circuit composed of a switching element S1 and a switching element S2, a series circuit composed of a switching element S3 and a switching element S4, a switching element S5 and a switching element.
  • the series circuit constituted by S6 is connected in parallel.
  • the converter 1-1 according to the first embodiment is connected to the three-phase AC power supply 3, but a single-phase AC power supply may be connected instead of the three-phase AC power supply 3. When a single-phase AC power supply is connected, the power module 22 has four power elements.
  • the bus voltage detector 23 detects the voltage applied to the terminals 21a and 21b of the smoothing capacitor 21, and outputs voltage information indicating the detected voltage as the bus voltage VPN.
  • the terminal 21a of the smoothing capacitor 21 is connected to the DC terminal 14 of the power module 22 via the positive electrode bus 70P, and the terminal 21b of the smoothing capacitor 21 is connected to the DC terminal 15 of the power module 22 via the negative electrode bus 70N. Therefore, the voltage applied to the terminals 21 a and 21 b of the smoothing capacitor 21 is equal to the voltage applied to the DC terminals 14 and 15 of the power module 22.
  • the bus current detection unit 25 is provided between the DC terminal 14 and the connection point 80P on the positive bus 70P, for example.
  • Bus current detector 25 detects a current flowing through positive electrode bus 70P, and outputs current information indicating the detected current as bus current IPN.
  • the bus current detection unit 25 may be a current sensor using an instrumental current transformer called CT (Current Transformer), or may be a current sensor using a shunt resistor.
  • CT Current Transformer
  • the bus current detector 25 may be a combination of these.
  • the bus current detection unit 25 may be provided between the DC terminal 15 and the connection point 80N on the negative electrode bus 70N to detect a current flowing through the negative electrode bus 70N.
  • the control power supply unit 29 generates power for driving the switching elements S1 to S6 of the power module 22 and power for driving the base drive circuit 27.
  • the emitter of the switching element S1 is connected to the R phase of the AC power supply 3 via the reactor 2-1
  • the emitter of the switching element S3 is connected to the S of the AC power supply 3 via the reactor 2-2
  • the emitter of the switching element S5 is connected to the T phase of the AC power supply 3 via the reactor 2-3. Therefore, in order to drive each of the switching elements S1, S3, and S5 arranged on the positive electrode side, the base drive circuit 27 sets the ground of the drive signal generation circuit that drives each of the switching elements S1, S3, and S5. It is necessary to divide.
  • the emitters of the switching elements S2, S4, S6 arranged on the negative electrode side are connected to the DC terminal 15 of the power module 22, they serve as reference potentials for the emitters of the switching elements S2, S4, S6.
  • the ground is the same. Therefore, in the base drive circuit 27, the ground of the drive signal generation circuit for driving the switching elements S2, S4, S6 arranged on the negative electrode side can be made the same. Therefore, in order to operate the base drive circuit 27, at least four insulated power supplies are required.
  • FIG. 2 is a diagram showing a configuration example of the control power supply unit shown in FIG.
  • the control power supply unit 29 includes a main power supply 31, a power supply control IC (Integrated Circuit) 32, a switching element 33, an insulating transformer 30, a plurality of rectifier elements D21, D22, D23, and D24. , Capacitors C21, C22, C23, C24, and a feedback unit 34.
  • IC Integrated Circuit
  • the insulating transformer 30 includes a primary winding N11 and a plurality of secondary windings N21, N22, N23, and N24. Each of the plurality of secondary windings N21, N22, N23, N24 is insulated between adjacent windings.
  • the power supply control IC 32 includes a power supply terminal VCC, a feedback terminal FB, a gate signal output terminal SW, and a ground terminal GND.
  • the positive terminal of the main power supply 31 is connected to the winding start side terminal of the primary winding N11 and the power supply terminal VCC of the power supply control IC 32.
  • the winding end side terminal of the primary winding N11 is connected to the drain terminal D of the switching element 33.
  • the source terminal S of the switching element 33 is connected to the negative terminal of the main power supply 31 and the GND terminal of the power supply control IC 32.
  • the gate G of the switching element 33 is connected to the SW terminal of the power supply control IC 32.
  • the anode of the rectifying element D21 is connected to the winding end side terminal of the secondary winding N21, and the cathode of the rectifying element D21 is connected to one end of the capacitor C21.
  • the other end of the capacitor C21 is connected to the winding start side terminal of the secondary winding N21 via the wiring 291.
  • One end of the wiring 291-1 is connected to a connection point between the cathode of the rectifying element D21 and one end of the capacitor C21.
  • One end of the wiring 291-2 is connected to a connection point between the other end of the capacitor C21 and the wiring 291.
  • a ground VRPGND serving as a reference potential of the voltage VRP generated in the wiring 291-1 is connected to the wiring 291-2.
  • the voltage VRP is equal to the voltage applied between one end and the other end of the capacitor C21.
  • the other ends of the wirings 291-1 and 291-2 are connected to the base drive circuit 27 shown in FIG.
  • the anode of the rectifying element D22 is connected to the winding end side terminal of the secondary winding N22, and the cathode of the rectifying element D22 is connected to one end of the capacitor C22.
  • the other end of the capacitor C22 is connected to the winding start side terminal of the secondary winding N22 via the wiring 292.
  • One end of the wiring 292-1 is connected to a connection point between the cathode of the rectifying element D22 and one end of the capacitor C22.
  • One end of the wiring 292-2 is connected to the connection point between the other end of the capacitor C22 and the wiring 292.
  • a ground VSPGND which is a reference potential of the voltage VSP generated in the wiring 292-1 is connected to the wiring 292-2.
  • the voltage VSP is equal to the voltage applied between one end and the other end of the capacitor C22.
  • the other ends of the wiring 292-1 and the wiring 292-2 are connected to the base drive circuit 27 shown in FIG.
  • the anode of the rectifying element D23 is connected to the winding end side terminal of the secondary winding N23, and the cathode of the rectifying element D23 is connected to one end of the capacitor C23.
  • the other end of the capacitor C23 is connected to the winding start side terminal of the secondary winding N23 via the wiring 293.
  • One end of the wiring 293-1 is connected to a connection point between the cathode of the rectifying element D23 and one end of the capacitor C23.
  • One end of the wiring 293-2 is connected to the connection point between the other end of the capacitor C23 and the wiring 293.
  • the wiring 293-2 is connected to a ground VTPGND that serves as a reference potential of the voltage VTP generated in the wiring 293-1.
  • the voltage VTP is equal to the voltage applied between one end and the other end of the capacitor C23.
  • the anode of the rectifying element D24 is connected to the winding end side terminal of the secondary winding N24, and the cathode of the rectifying element D24 is connected to one end of the capacitor C24.
  • the other end of the capacitor C24 is connected to the winding start side terminal of the secondary winding N24 via the wiring 294.
  • One end of the wiring 294-1 is connected to a connection point between the cathode of the rectifying element D24 and one end of the capacitor C24.
  • One end of the wiring 294-2 is connected to a connection point between the other end of the capacitor C24 and the wiring 294.
  • the wiring 294-2 is connected to the ground VNGGND that serves as a reference potential for the voltage VN generated in the wiring 294-1.
  • the voltage VN is equal to the voltage applied between one end and the other end of the capacitor C24.
  • the voltage VN is input to the feedback unit 34.
  • a photocoupler is used for the feedback unit 34.
  • the feedback unit 34 sets the voltage VN to a voltage value that can be handled by the power supply control IC 32 in a state where the FB terminal of the power supply control IC 32 and the secondary winding N24 are insulated.
  • the voltage value after conversion is input to the FB terminal of the power supply control IC 32.
  • the number of turns of each of the secondary windings N21, N22, and N23 is made equal to the number of turns of the secondary winding N24, so that the voltage generated in each of the capacitors C21, C22, and C23 is the capacitor C24. Is almost equal to the voltage generated in
  • the operation of the control power supply unit 29 will be described.
  • the power supply control IC 32 generates a control signal for controlling the on / off operation of the switching element 33 based on the voltage VN output from the feedback unit 34.
  • the power supply control IC 32 outputs the generated control signal from the SW terminal, and the output control signal is input to the gate G of the switching element 33.
  • the switching element 33 repeats the on / off operation, and the value of the voltage VN input to the feedback unit 34 is maintained at a specific value.
  • the voltage phase detector 24 shown in FIG. 1 detects the voltage phase of the AC power supply 3, and outputs phase information indicating the detected voltage phase to the base drive signal generator 26 as a phase detection signal.
  • the phase detection signal is a signal that takes a high level or low level potential. The voltage phase detection method by the voltage phase detector 24 and details of the phase detection signal will be described later.
  • the base drive signal generator 26 Based on the phase detection signal output from the voltage phase detector 24, the base drive signal generator 26 has six types of base drive signals SRP, SRN, SSP, SSN, STP, for driving the switching elements S1 to S6.
  • An STN is generated and output to the regeneration control unit 28.
  • Each of the six types of base drive signals SRP, SRN, SSP, SSN, STP, and STN is a signal that takes a High level or Low level potential.
  • the base drive signal SRP is a signal for driving the switching element S1 for the positive side of the R phase.
  • the base drive signal SRN is a signal for driving the switching element S2 for the negative side of the R phase.
  • the base drive signal SSP is a signal for driving the switching element S3 for the positive side of the S phase.
  • the base drive signal SSN is a signal for driving the switching element S4 for the negative side of the S phase.
  • the base drive signal STP is a signal for driving the switching element S5 for the positive side of the T phase.
  • the base drive signal STN is a signal for driving the switching element S6 for the negative side of the T phase.
  • the six types of base drive signals SRP, SRN, SSP, SSN, STP, and STN may be referred to as base drive signals SRP to STN.
  • the regeneration control unit 28 continues to transmit the base drive signal SRP output from the base drive signal generation unit 26 to the base drive circuit 27 of the STN, or the base drive signal. It is determined whether to stop transmission of the STN to the base drive circuit 27 from the base drive signal SRP output from the generation unit 26. If the regeneration control unit 28 determines that the transmission of the STN from the base drive signal SRP to the base drive circuit 27 is continued, the STN is continuously input to the base drive circuit 27 from the base drive signal SRP. When the regeneration control unit 28 determines that the transmission of the STN from the base drive signal SRP to the base drive circuit 27 is stopped, the input of the STN from the base drive signal SRP to the base drive circuit 27 is stopped.
  • FIG. 3 is a diagram illustrating a configuration example of the regeneration control unit illustrated in FIG. 1.
  • the regeneration control unit 28 includes a regeneration start determination unit 60, a regeneration stop determination unit 61, an OR circuit 62, and an NPN transistor 63.
  • the bus voltage VPN is input to the regeneration start determination unit 60 in the regeneration start determination unit 60.
  • the regeneration start determination unit 60 has a function of determining whether to start the regeneration operation by the power module 22 shown in FIG. 1 based on the bus voltage VPN.
  • the regeneration start determination unit 60 includes a subtracter 64 and a comparator 65.
  • the subtractor 64 receives the bus voltage VPN and the reference voltage Vref.
  • the reference voltage Vref is a voltage set in advance based on the voltage of the AC power supply 3.
  • the reference voltage Vref is generated by a method of generating the reference voltage Vref by detecting the voltage of the AC power supply 3, a method of generating the reference voltage Vref based on the bus voltage VPN output from the bus voltage detector 23, and the like. However, any method is publicly known, and a detailed description thereof is omitted here.
  • the subtractor 64 calculates a difference voltage ⁇ V that is a difference between the bus voltage VPN and the reference voltage Vref.
  • the difference voltage ⁇ V is input to the plus terminal of the comparator 65.
  • the threshold voltage Vo is input to the negative terminal of the comparator 65.
  • the comparator 65 compares the difference voltage ⁇ V and the threshold voltage Vo, and outputs a signal that takes a high level or low level potential. For example, when the difference voltage ⁇ V is larger than the threshold voltage Vo, a high level signal is output.
  • the high level signal is a signal indicating that the regenerative operation by the power module 22 is started when the bus voltage VPN becomes higher than a certain value.
  • the difference voltage ⁇ V is less than the threshold voltage Vo, a low level signal is output.
  • a signal output from the comparator 65 is input to the OR circuit 62 as an output signal of the regeneration start determination unit 60.
  • the difference voltage ⁇ V and the threshold voltage Vo are such that the difference voltage ⁇ V ⁇ the threshold voltage Vo. Therefore, for example, a hysteresis function is provided in the comparator 65, a one-shot trigger circuit is provided in the output of the comparator 65, or a regeneration start determination is made so that the regeneration operation continues until a certain period elapses after the regeneration operation starts. It is desirable to constitute part 60.
  • the regenerative stop determination unit 61 receives the bus current IPN.
  • the regeneration stop determination unit 61 has a function of determining whether to stop the regeneration operation in the power module 22 based on the bus current IPN.
  • the regeneration stop determination unit 61 includes a comparator 66.
  • the threshold current Iref is input to the plus terminal of the comparator 66.
  • the bus current IPN is input to the negative terminal of the comparator 66.
  • the comparator 66 compares the bus current IPN and the threshold current Iref, and outputs a signal that takes a High level or Low level potential. For example, when the bus current IPN is larger than the threshold current Iref, a low level signal is output. When the bus current IPN becomes less than the threshold current Iref, a high level signal is output.
  • a signal output from the comparator 66 is input to the OR circuit 62 as an output signal of the regeneration stop determination unit 61.
  • the output of the OR circuit 62 is connected to the base of the NPN transistor 63.
  • a regenerative on signal Ron that is an output signal of the OR circuit 62 is input to the base of the NPN transistor 63.
  • a base drive signal generator 26 shown in FIG. 1 is connected to the collector of the NPN transistor 63.
  • STN is input to the collector of the NPN transistor 63 from the base drive signal SRP that is the output of the base drive signal generator 26.
  • the emitter of the NPN transistor 63 is connected to the base drive circuit 27.
  • the output signals of the regeneration start determination unit 60 and the regeneration stop determination unit 61 are input to the OR circuit 62.
  • the OR circuit 62 When any output signal is at a high level, the OR circuit 62 outputs a high level signal.
  • the OR circuit 62 outputs a high level signal, the NPN transistor 63 is turned on, and the base drive signals SRP to STN are input to the base drive circuit 27 shown in FIG.
  • the base drive signal SRP is converted into a signal that can be handled by each power element of the power module 22, and the converted base drive signals SRP ′, SRN ′, SSP ′, SSN are converted signals. ', STP', STN 'are generated.
  • the generated base drive signals SRP ', SRN', SSP ', SSN', STP ', STN' are input to the bases of the switching elements S1 to S6. Thereby, the on / off operation of the switching elements S1 to S6, that is, the regenerative operation of the power module 22 is performed.
  • the base drive signals SRP ', SRN', SSP ', SSN', STP ', STN' may be referred to as base drive signals SRP 'to STN'. Details of the base drive circuit 27 will be described later.
  • the OR circuit 62 When the output signals of the regeneration start determination unit 60 and the regeneration stop determination unit 61 are at the Low level, the OR circuit 62 outputs a Low level signal.
  • the OR circuit 62 When the OR circuit 62 outputs a low level signal, the NPN transistor 63 is turned off, and the STN input from the base drive signal SRP to the base drive circuit 27 shown in FIG. 1 is cut off. As a result, all of the switching elements S1 to S6 are turned off, and the regenerative operation is stopped.
  • the base drive circuit 27 will be described. As described above, the base drive circuit 27 uses the base drive signals SRP ′, SRN ′, and SSP ′ that the power module 22 can handle the base drive signals SRP, SRN, SSP, SSN, STP, and SSN output from the regeneration control unit 28. , SSN ′, STP ′, STN ′, and has a function of inputting to the bases of the switching elements S1 to S6 of the power module 22.
  • FIG. 4 is a diagram showing a configuration example of the base drive circuit 27 shown in FIG. As shown in FIG. 4, the base drive circuit 27 includes a base control circuit 35 and a voltage application unit 36.
  • the base control circuit 35 electrically insulates the signal input to the base control circuit 35 and outputs an output signal having the same potential as that of the input signal, that is, when the input signal is at a high level, When the input signal is at a low level, a function of outputting an output signal at a low level to the voltage application unit 36 is provided.
  • a base drive signal SRP that takes a high-level potential
  • the base control circuit 35 is electrically insulated from the base drive signal SRP, and is at a high-level potential. Is output to the voltage application unit 36.
  • a photocoupler or an insulated pulse transformer is used for the base control circuit 35.
  • the components constituting the base control circuit 35 are not limited thereto, and the input signal and the output signal are electrically insulated. Therefore, any device that transmits an output signal having the same potential as the input signal may be used.
  • the base control circuit 35 electrically insulates the base drive signal SRP and converts it into a signal having the same potential as the base drive signal SRP, and electrically insulates the base drive signal SRN,
  • the control circuit 35B for converting to a signal having the same potential is electrically insulated from the base drive signal SSP, and the control circuit 35C for converting to a signal having the same potential as the base drive signal SSP is electrically insulated from the base drive signal SSN.
  • the output signal of the base control circuit 35 is input to the voltage application unit 36.
  • the plurality of outputs of the voltage application unit 36 are connected to the bases of the switching elements S1 to S6 of the power module 22.
  • the voltage application unit 36 generates a base drive signal SRP ′ based on the output signal of the control circuit 35A, and generates a base drive signal SRN ′ based on the output signal of the control circuit 35B.
  • a second voltage application unit 36B that generates and outputs a base drive signal SSP ′ based on the output signal of the control circuit 35C.
  • the voltage application unit 36 generates a base drive signal SSN ′ based on the output signal of the control circuit 35D, and generates a base drive signal STP ′ based on the output signal of the control circuit 35E. And a fifth voltage application unit 36F that generates and outputs a base drive signal STN ′ based on the output signal of the control circuit 35F.
  • FIG. 5 is a diagram illustrating a configuration example of the first voltage application unit illustrated in FIG.
  • the first voltage application unit 36 ⁇ / b> A includes an NPN transistor 37, a PNP transistor 38, and a base resistor 39.
  • the base of the NPN transistor 37 and the base of the PNP transistor 38 are connected to each other, and the output of the control circuit 35A is connected to each base.
  • the emitter of the NPN transistor 37 and the emitter of the PNP transistor 38 are connected to each other, and one end of the base resistor 39 is connected to each of them.
  • the other end of the base resistor 39 is connected to the base of the switching element S1.
  • the collector of the NPN transistor 37 is connected to the wiring 291-1 shown in FIG.
  • the voltage VRP generated by the control power supply unit 29 shown in FIG. 2 is applied to the collector of the NPN transistor 37.
  • the collector of the PNP transistor 38 and the emitter of the switching element S1 are connected to each other and further connected to the wiring 291-2 shown in FIG. Thereby, the collector of the PNP transistor 38 and the emitter of the switching element S1 are electrically connected to the ground VRPGND shown in FIG.
  • FIG. 6 is a diagram illustrating a configuration example of the second voltage application unit illustrated in FIG.
  • the second voltage application unit 36B includes an NPN transistor 37, a PNP transistor 38, and a base resistor 39, like the first voltage application unit 36A.
  • the output of the control circuit 35B is connected to the base of the NPN transistor 37 and the base of the PNP transistor 38.
  • the other end of the base resistor 39 is connected to the base of the switching element S2.
  • the collector of the NPN transistor 37 is connected to the wiring 294-1 shown in FIG. Thereby, the voltage VN generated by the control power supply unit 29 shown in FIG.
  • the collector of the PNP transistor 38 and the emitter of the switching element S2 are connected to the wiring 294-2 shown in FIG.
  • the collector of the PNP transistor 38 and the emitter of the switching element S2 are electrically connected to the ground VNGND shown in FIG.
  • FIG. 7 is a diagram illustrating a configuration example of the third voltage applying unit illustrated in FIG.
  • the third voltage applying unit 36C includes an NPN transistor 37, a PNP transistor 38, and a base resistor 39, like the first voltage applying unit 36A.
  • the output of the control circuit 35C is connected to the base of the NPN transistor 37 and the base of the PNP transistor 38.
  • the other end of the base resistor 39 is connected to the base of the switching element S3.
  • the collector of the NPN transistor 37 is connected to the wiring 292-1 shown in FIG. Thereby, the voltage VSP generated by the control power supply unit 29 shown in FIG.
  • the collector of the PNP transistor 38 and the emitter of the switching element S3 are connected to the wiring 292-2 shown in FIG. Thereby, the collector of the PNP transistor 38 and the emitter of the switching element S3 are electrically connected to the ground VSPGND shown in FIG.
  • FIG. 8 is a diagram illustrating a configuration example of the fourth voltage application unit illustrated in FIG. 4.
  • the fourth voltage application unit 36D includes an NPN transistor 37, a PNP transistor 38, and a base resistor 39, like the first voltage application unit 36A.
  • the output of the control circuit 35D is connected to the base of the NPN transistor 37 and the base of the PNP transistor 38.
  • the other end of the base resistor 39 is connected to the base of the switching element S4.
  • the collector of the NPN transistor 37 is connected to the wiring 294-1 shown in FIG. Thereby, the voltage VN generated by the control power supply unit 29 shown in FIG.
  • the collector of the PNP transistor 38 and the emitter of the switching element S4 are connected to the wiring 294-2 shown in FIG.
  • the collector of the PNP transistor 38 and the emitter of the switching element S4 are electrically connected to the ground VNGND shown in FIG.
  • FIG. 9 is a diagram illustrating a configuration example of the fifth voltage application unit illustrated in FIG.
  • the fifth voltage application unit 36E includes an NPN transistor 37, a PNP transistor 38, and a base resistor 39, like the first voltage application unit 36A.
  • the output of the control circuit 35E is connected to the base of the NPN transistor 37 and the base of the PNP transistor 38.
  • the other end of the base resistor 39 is connected to the base of the switching element S5.
  • the collector of the NPN transistor 37 is connected to the wiring 293-1 shown in FIG. Thereby, the voltage VTP generated by the control power supply unit 29 shown in FIG.
  • the collector of the PNP transistor 38 and the emitter of the switching element S5 are connected to the wiring 293-2 shown in FIG. Thereby, the collector of the PNP transistor 38 and the emitter of the switching element S5 are electrically connected to the ground VTPGND shown in FIG.
  • FIG. 10 is a diagram illustrating a configuration example of the sixth voltage application unit illustrated in FIG.
  • the sixth voltage application unit 36F includes an NPN transistor 37, a PNP transistor 38, and a base resistor 39, like the first voltage application unit 36A.
  • the output of the control circuit 35F is connected to the base of the NPN transistor 37 and the base of the PNP transistor 38.
  • the other end of the base resistor 39 is connected to the base of the switching element S6.
  • the collector of the NPN transistor 37 is connected to the wiring 294-1 shown in FIG. Thereby, the voltage VN generated by the control power supply unit 29 shown in FIG.
  • the collector of the PNP transistor 38 and the emitter of the switching element S6 are connected to the wiring 294-2 shown in FIG.
  • the collector of the PNP transistor 38 and the emitter of the switching element S6 are electrically connected to the ground VNGND shown in FIG.
  • the operation of the base drive circuit 27 will be described using the first voltage application unit 36A shown in FIG.
  • the control circuit 35A When the base drive signal SRP of the switching element S1 is output from the regeneration control unit 28, the control circuit 35A generates and outputs a signal insulated from the base drive signal SRP.
  • the PNP transistor 38 When a high level signal is input to the first voltage application unit 36A, the PNP transistor 38 is turned off and the NPN transistor 37 is turned on.
  • the wiring 291-1 and the base of the switching element S1 become conductive via the base resistor 39, and charges are charged between the base and emitter electrodes of the switching element S1.
  • a voltage applied between the base and emitter electrodes of the switching element S1 is referred to as a voltage VBE.
  • VBE a voltage applied between the base and emitter electrodes of the switching element S1
  • the NPN transistor 37 When a low level signal is input to the first voltage application unit 36A, the NPN transistor 37 is turned off and the PNP transistor 38 is turned on. As a result, the ground VRPGND and the base of the switching element S1 become conductive through the base resistor 39, and the charge charged between the base and emitter electrodes of the switching element S1 is discharged. When the electric charge is discharged and the voltage VBE applied between the base and emitter electrodes of the switching element S1 becomes less than a predetermined threshold voltage, the switching element S1 is turned off. When the voltage VBE decreases to the ground VRPGND, the discharge of the charge charged between the base and emitter electrodes of the switching element S1 is completed.
  • the base drive circuit 27 uses the power supplies generated by the control power supply unit 29 to generate the base drive signals SRP, SPN, SSP, SSN, STP, and STN output from the regeneration control unit 28. Are converted into base drive signals SRP ′, SRN ′, SSP ′, SSN ′, STP ′, and STN ′ that can be handled by the switching elements S1 to S6.
  • FIG. 11 is a diagram for explaining the operation of the voltage phase detector shown in FIG.
  • the emitters of the switching elements S1, S3, and S5 arranged on the positive electrode side of the power module 22 are connected to the R phase, S phase, and T phase of the AC power supply 3 via the reactor 2.
  • the emitters of the switching elements S1, S3, and S5 are connected to the ground VRPGND, VSPGND, and VTPGND of the control power supply unit 29.
  • the voltage phase detector 24 detects the input R-phase voltage VR1 based on a signal generated at the ground VRPGND connected to the wiring 291-2.
  • Input R-phase voltage VR1 is equivalent to a voltage applied between AC terminal 11 and AC terminal 12 shown in FIG.
  • the voltage phase detector 24 detects the input S-phase voltage VS1 based on a signal generated at the ground VSPGND connected to the wiring 292-2.
  • Input S-phase voltage VS1 is equivalent to a voltage applied between AC terminal 12 and AC terminal 13 shown in FIG.
  • the voltage phase detector 24 detects the input T-phase voltage VT1 based on a signal generated at the ground VTPGND connected to the wiring 293-2.
  • Input T-phase voltage VT1 is equivalent to a voltage applied between AC terminal 13 and AC terminal 11 shown in FIG. Since the emitters of the switching elements S1, S3, S5 are connected to the ground VRPGND, VSPGND, VTPGND of the control power supply unit 29, the voltage phase detection unit 24 has a signal flowing through the emitters of the switching elements S1, S3, S5, or The voltage phase of the AC voltage when the switching elements S1 to S6 are turned on / off so that AC power is regenerated from the power module 22 to the AC power source 3 based on a signal flowing to the ground serving as the reference potential of the control power supply unit 29. A phase detection signal indicating the detected voltage phase is generated and output.
  • FIG. 12 is a time chart for explaining the operation of the converter shown in FIG. FIG. 12 shows, in order from the top, the waveforms of line voltages VR-S, VS-T, VT-R, VS-R, VT-S, and VR-T output from the AC power supply 3, and the line voltages.
  • Waveforms of six types of phase detection signals generated based on the waveforms, waveforms of base drive signals SRP to STN, and waveforms of regenerative currents (Irr, Isr, Itr) flowing in the R phase, T phase, and S phase are shown.
  • the line voltage VR-S and the line voltage VS-R correspond to the aforementioned input R-phase voltage VR1 and change complementarily.
  • the line voltage VS-T and the line voltage VT-S correspond to the input S-phase voltage VS1 and change complementarily.
  • the line voltage VR-T and the line voltage VT-R correspond to the above-described input T-phase voltage VT1 and change complementarily.
  • the regenerative current is a current that flows from the motor driving device 4 shown in FIG. 1 toward the AC power supply 3 via the switching elements S1 to S6 during the regenerative operation.
  • the line voltage VR-S is obtained by detecting a voltage difference from the R phase with reference to the S phase, whereas the line voltage VS-R is a voltage difference from the S phase with respect to the R phase. Is detected. The voltage phase between the line voltage VR-S and the line voltage VS-R is shifted by 180 degrees.
  • the line voltage VS-T is obtained by detecting a voltage difference from the S phase with respect to the T phase, whereas the line voltage VT-S is a voltage with respect to the T phase with respect to the S phase. The difference is detected, and the voltage phase between the line voltage VS-T and the line voltage VT-S is shifted by 180 degrees.
  • the line voltage is a voltage difference with the T phase detected with the R phase as a reference
  • the line voltage VR-T is a voltage difference with the R phase detected with the T phase as a reference.
  • the voltage phase between the line voltage and the line voltage VR-T is shifted by 180 degrees.
  • the voltage phase detector 24 is configured to detect the line voltage VR-S, the line voltage VS-R, the line voltage VS-T, The voltage VT-S, the line voltage VR-T, and the line voltage VT-R are estimated, and based on the estimated results, a zero cross point of each line voltage is extracted, and the extracted zero cross point is handled as a phase detection signal.
  • This phase detection signal is output to the base drive signal generator 26.
  • Each phase detection signal output from the voltage phase detector 24 is illustrated in FIG. In FIG.
  • phase detection signal between the RS lines, the phase detection signal between the SR lines, the phase detection signal between the ST lines, the phase detection signal between the TS lines, and the phase between the TR lines A detection signal and an RT line phase detection signal are shown.
  • an RS line phase detection signal takes a high level value in a section (phase section) where the difference between the line voltage VR-S and the line voltage VS-R is positive (phase section), and a negative section (phase section). ) Takes a low level value.
  • the voltage phase detector 24 generates a phase detection signal whose level changes in this way in association with each line voltage.
  • the base drive signal generator 26 generates an STN from the base drive signal SRP by the following method based on each phase detection signal shown in FIG.
  • the base drive signal generation unit 26 sets the base drive signals SRP and SSN to a high level and controls the switching elements S1 and S4 to be on.
  • the base drive signal generator 26 sets the base drive signals SSP and STN to High level, and controls the switching elements S3 and S6 to be on.
  • the base drive signal generation unit 26 sets the base drive signals STP and SRN to a high level, and controls the switching elements S5 and S2 to be on.
  • the base drive signal generation unit 26 sets the base drive signals SSP and SRN to a high level and controls the switching elements S3 and S2 to be on.
  • the base drive signal generation unit 26 sets the base drive signals STP and SSN to a high level and controls the switching elements S5 and S4 to be on.
  • the base drive signal generator 26 sets the base drive signals SRP and STN to the high level, and controls the switching elements S1 and S6 to be on.
  • FIG. 1 shows the R-phase current Ir, the S-phase current Is, and the T-phase current It indicated by arrows in the direction from the AC power supply 3 to the converter 1-1. Treated as a positive current, the waveforms of the three regenerative currents shown in FIG. 12 are represented accordingly.
  • the inductor LR is an inductor of the reactor 2-1 shown in FIG.
  • the inductor LS is the inductor of the reactor 2-2 shown in FIG.
  • the inductor LT is an inductor of the reactor 2-3 shown in FIG.
  • the inductor LR1 is an inductance caused by a wiring provided between the AC terminal 11 and the emitter of the switching element S1.
  • the inductor LS1 is an inductance caused by a wiring provided between the AC terminal 12 and the emitter of the switching element S3.
  • the inductor LT1 is an inductance caused by a wiring provided between the AC terminal 13 and the emitter of the switching element S5.
  • the input R-phase voltage VR1 is a voltage applied to the emitter of the switching element S1.
  • the R-phase voltage VR ⁇ b> 2 is a voltage applied between the inductor LR and the AC terminal 11.
  • the input S-phase voltage VS1 is a voltage applied to the emitter of the switching element S3.
  • the S-phase voltage VS2 is a voltage applied between the inductor LS and the AC terminal 12.
  • Input T-phase voltage VT1 is a voltage applied to the emitter of switching element S5.
  • the T-phase voltage VT2 is a voltage applied between the inductor LT and the AC terminal 13.
  • the input R-phase voltage VR1 is detected based on the signal generated in the ground VRPGND connected to the wiring 291-2, and the wiring 292- 2, the input S-phase voltage VS1 is detected based on the signal generated at the ground VSPGND connected to the second terminal, and the input T-phase voltage VT1 is further detected based on the signal generated at the ground VTPGND connected to the wiring 293-2. Detected. Therefore, when the power module 22 is viewed from the AC power supply 3, the inductor LR exists in the wiring connecting the terminal 3R of the AC power supply 3 and the AC terminal 11, and the wiring connecting the AC terminal 11 and the switching element S1 is present.
  • the inductor LR1 includes an inductor LR1 and an inductance caused by the wiring 291-2.
  • the inductor LS exists in the wiring connecting the terminal 3S of the AC power supply 3 and the AC terminal 12, and the wiring connecting the AC terminal 12 and the switching element S3 is caused by the inductor LS1 and the wiring 292-2.
  • the inductor LT exists in the wiring connecting the terminal 3T and the AC terminal 13 of the AC power supply 3, and the wiring connecting the AC terminal 13 and the switching element S5 is caused by the inductor LT1 and the wiring 293-2.
  • the inductance component from the AC power supply 3 to the switching elements S1, S3, S5 is increased.
  • FIG. 15 is a diagram illustrating waveforms such as a line voltage, a base drive signal, and a phase detection signal that are generated during the regenerative operation of the converter according to the first embodiment.
  • FIG. 15 shows, in order from the top, the waveforms of the base drive signals SRP to STN, the waveforms of the line voltages VR-S, VS-T, and VT-R during the regenerative operation, and the R phase generated during the regenerative operation.
  • the waveform of the phase detection signal RSD is shown.
  • FIG. 15 when the STN is switched between the high level and the low level from the base drive signal SRP, when the on / off operation of the switching elements S1 to S6 shown in FIG.
  • the input R-phase voltage VR1 or the like is input to the voltage phase detection unit 24.
  • the wiring 291 is provided between the AC terminal 11 of the power module 22 and the switching element S1. Inductance due to -2 exists. Although this inductance can reduce the influence of voltage fluctuation caused by the regenerative operation of the external device connected to the AC power supply 3, the switching elements S1 to S6 are connected to the wiring 291-2 connected to the switching elements S1 to S6. Spike-like voltage fluctuations resulting from the on / off operation of the first and second signals are superimposed. The voltage fluctuation shown in FIG. 15 and FIG.
  • the voltage phase detection unit 24 transmits signals such as a wiring 291-2 connected to the switching element S1, a wiring 292-2 connected to the switching element S3, a wiring 293-2 connected to the switching element S5, That is, since the input R-phase voltage VR1, the input S-phase voltage VS1, and the input T-phase voltage VT1 are detected, it is also affected by voltage fluctuations caused by ringing that occurs during the on / off operation of the switching elements S1, S3, and S5. Therefore, compared with the case where the phase detection signal is generated by detecting the values of the phase voltages VR2, VS2, VT2 applied between the reactor 2 and the AC terminals 11, 12, 13 of the power module 22, the voltage There are many factors of fluctuation.
  • FIG. 18 is a diagram illustrating a waveform of an R-phase phase detection signal generated by the voltage phase detection unit according to the second embodiment and a waveform of an R-phase phase voltage generated based on the phase detection signal.
  • FIG. 18 shows the phase detection threshold voltage, the waveform of the neutral phase reference phase voltage VR3 generated during the regeneration operation of the converter 1-2, and the voltage phase detection unit 24A during the regeneration operation of the converter 1-2.
  • the waveform of the generated phase detection signal RD3 is shown.
  • the value of the phase detection threshold voltage is set to such a value that the potential of the phase detection signal RD3 becomes High level when the phase of the neutral point reference phase voltage VR3 is between 60 ° and 120 °.
  • the threshold voltage for phase detection is set in the voltage phase detector 24A.
  • phase of the neutral point reference phase voltage VR3 When the phase of the neutral point reference phase voltage VR3 reaches 60 °, the potential of the phase detection signal RD3 changes from Low level to High level. When the phase of the neutral point reference phase voltage VR3 reaches 90 °, the potential of the phase detection signal RD3 changes in the order of High level, Low level, and High level in a short period of time. When the phase of the neutral point reference phase voltage VR3 reaches 120 °, the potential of the phase detection signal RD3 changes from the High level to the Low level. In the interval from the phase of the neutral point reference phase voltage VR3 to 120 ° to the phase 60 ° after one cycle, the potential of the phase detection signal RD3 is maintained at the low level. The phase 60 ° after one cycle is equivalent to the phase 420 °.
  • the potential of the phase detection signal RD3 changes from the Low level to the High level.
  • the center of the section from the phase 120 ° to 420 ° of the neutral point reference phase voltage VR3 corresponds to the phase 270 ° of the neutral point reference phase voltage VR3, and the phase of the neutral point reference phase voltage VR3 is 270 °. In this case, the potential of the neutral point reference phase voltage VR3 is minimum.
  • the phase of the neutral point reference phase voltage VR3 is changed from 60 ° by setting the value of the phase detection threshold voltage near the value at which the potential of the neutral point reference phase voltage VR3 becomes maximum. Up to 120 °, the potential of the phase detection signal RD3 changes once. That is, the number of times affected by the on / off operation of the switching element can be set only when the phase of the neutral reference phase voltage VR3 is 90 °.
  • the potential of the phase detection signal RD3 changes from the High level to the Low level in the interval where the phase of the neutral point reference phase voltage VR3 is 120 ° to 420 °.
  • the minimum value of the neutral point reference phase voltage VR3 can be calculated by calculating the time from the time point to the time point when the level changes from the Low level to the High level. This time is assumed to be longer than the specific period used for the noise determination. By utilizing the minimum value of the neutral point reference phase voltage VR3, the voltage phase of the AC power supply 3 can be detected.
  • the phase detection signal is generated based on the signals generated at grounds VRPGND, VSPGND, and VTPGND provided in control power supply unit 29. Even in this case, the voltage phase of the AC power supply 3 can be detected without being affected by the on / off operation of the switching element.
  • the voltage phase is detected using the minimum value of the phase voltage.
  • the converter 1-2 according to the second embodiment has not only the minimum value of the phase voltage but also the maximum value.
  • voltage phase detection can be performed in a shorter time. For example, by adding a phase detection threshold voltage such that the phase detection signal RD3 is at a high level while the phase of the neutral point reference phase voltage VR3 is between 240 ° and 300 °, The maximum value of the phase voltage VR3 can be calculated.
  • the phase of the maximum value of the neutral point reference phase voltage VR3 corresponds to, for example, the phase 90 ° and the phase 270 ° of the neutral point reference phase voltage VR3 shown in FIG.
  • the voltage phase is detected by calculating the phase voltage, but the converter 1-2 of the second embodiment calculates the voltage phase by calculating the line voltage. It is also possible to perform detection. For example, when the phase of the line voltage is between 45 ° and 135 °, a phase detection threshold voltage may be set such that the potential of the phase detection signal is at a high level. In this case, when the phase of the line voltage is between 135 ° and 405 °, the potential of the phase detection signal is at a low level, and the center point of the phase of the line voltage from 135 ° to 405 ° is the phase 270 °. The line voltage corresponding to is the minimum value.
  • a line-to-line voltage that is a line-to-line voltage is obtained by using a signal transmitted to the pattern wiring on the printed board.
  • the voltage VR-S, the line voltage VS-T, the line voltage VT-R, and the input R phase voltage VR1, the input S phase voltage VS1, and the input T phase voltage VT1, which are phase voltages, can be calculated. For this reason, these voltages can be used for the detection of a power failure.
  • the detection of a power failure is to detect a state where power from the AC power source 3 is not supplied to the converter. The detection of a power failure will be further described in detail in a third embodiment to be described later.
  • FIG. 19 is a diagram illustrating a configuration of a converter and a motor control device according to the third embodiment.
  • Converter 1-3 according to Embodiment 3 has the same configuration as converter 1-1 shown in FIG. 1, and further includes an input voltage detection unit 43.
  • FIG. 20 is a diagram for explaining the operation of the input voltage detection unit 43 shown in FIG. FIG. 20 has the same configuration as FIG. 11, and an input voltage detection unit 43 is illustrated instead of the voltage phase detection unit 24.
  • the input voltage detection unit 43 includes a signal VR1 generated in the ground VRPGND connected to the wiring 291-2 and a signal generated in the ground VSPGND connected to the wiring 292-2 as described in the first embodiment.
  • VS1 and VT1 which is a signal generated in the ground VTPGND connected to the wiring 293-2 are input.
  • the input voltage detector 43 detects the line voltage or phase voltage of the AC power supply 3 based on these signals.
  • the configuration for detecting the phase voltage or the line voltage of the AC power supply 3 as in the first embodiment. can be prevented from becoming complicated. Further, according to the third embodiment, since a signal generated in the ground connected to the wiring 291-2 can be used, it is possible to design a pattern that can be easily arranged on a printed circuit board, and to save space. .
  • the power failure detection unit may be a display device or an audio device that simply notifies whether or not a power failure has occurred, or may be a control device or a controller having a control function.
  • control such as how to operate the motor 5 controlled by the motor driving device 4 using the DC power of the converter 1-3 when a power failure occurs in the AC power source 3 or It is possible to give instructions promptly.
  • FIG. 21 is a diagram illustrating a configuration of a converter and a motor control device according to the fourth embodiment.
  • Converter 1-4 according to the fourth embodiment is provided with an input current detection unit 25A that detects a three-phase input current flowing in AC wirings 51, 52, and 53, instead of bus current detection unit 25 shown in FIG. .
  • Converter 1-4 includes an RST-dq coordinate conversion unit 44, which is a current value conversion unit, and a regeneration control unit 28A.
  • the RST-dq coordinate conversion unit 44 performs coordinate conversion on the output signal of the input current detection unit 25A based on the phase detection signal that is the output signal of the voltage phase detection unit 24, so that d is a current corresponding to active power.
  • An axis current Id and a q-axis current Iq that is a current corresponding to reactive power are calculated.
  • the regeneration control unit 28A performs a regeneration start operation and a regeneration stop operation based on the d-axis current Id and the output signal of the bus voltage detection unit 23.
  • the voltage phase detection unit 24 shown in the first embodiment is used.
  • the voltage phase detection unit 24A may be replaced with the voltage phase detection unit 24A shown in the second embodiment.
  • the input voltage detection unit 43 described in the third embodiment may be added.
  • each voltage phase detection unit has been described as detecting the line voltage of the AC power supply 3 or the voltage phase of the phase voltage.
  • the present invention is not limited to this.
  • at least one of other information such as the power supply angular frequency ⁇ , the R phase voltage phase ⁇ r, the S phase voltage phase ⁇ s, and the T phase voltage phase ⁇ t of the AC power supply 3 is calculated.
  • the R phase voltage phase may be referred to as a first voltage phase
  • the S phase voltage phase may be referred to as a second voltage phase
  • the T phase voltage phase may be referred to as a third voltage phase.
  • the RST-dq coordinate conversion unit 44 has a function of converting an RST axis that is a fixed coordinate axis into a dq axis that is a rotation coordinate axis.
  • the voltage phase detector 24 calculates the power source angular frequency ⁇ and the R phase voltage phase ⁇ r of the AC power source 3, and converts the RST axis signal into a dq axis signal based on the power source angular frequency ⁇ and the R phase voltage phase ⁇ r.
  • FIG. 22 is a diagram for explaining the RST axis and the dq axis used in the control of the fourth embodiment.
  • the RST axis is a fixed coordinate axis indicating the R phase, S phase, and T phase of the AC power supply 3.
  • the dq axis is a rotational coordinate axis that rotates clockwise at the power source angular frequency ⁇ .
  • the phase of the d-axis with respect to the R-phase axis is ⁇
  • equation (2) is established between the two coordinate axes.
  • Equation (3) can be derived by calculating the voltages Vd and Vq of the dq axis which is the rotation coordinate axis using the above equations (1) and (2).
  • the equation (4) can be derived from any value of ⁇ in the equation (3). That is, the d-axis voltage is equivalent to the power supply voltage vector. Accordingly, the d-axis corresponds to the active power direction, and the q-axis corresponds to the reactive power direction.
  • the R-phase voltage VR can be expressed by the following equation (6).
  • the initial phase ⁇ can be set to ⁇ / 2.
  • the above equation (7) is an equation based on the R-phase voltage phase ⁇ r calculated by the voltage phase detector 24 and the power supply angular frequency ⁇ , and an RST-dq coordinate converter 44 that converts the RST axis to the dq axis. This is the formula used in Therefore, the input currents Ir, Is, It can be converted into the d-axis current Id and the q-axis current Iq using the following formula (8).
  • a converter when input currents Ir, Is, It are detected and control such as start and stop of a regenerative operation is performed, it is necessary to convert an RST axis that is a fixed coordinate axis into a dq axis that is a rotational coordinate axis.
  • information on the voltage phase of the AC power supply 3 is required.
  • the voltage phase of the AC power supply 3 is detected by using the signal generated in the ground connected to the wiring 291-2 that is the pattern wiring on the printed circuit board by using the method of the present embodiment. Therefore, the configuration for detecting the voltage phase of the AC power supply 3 can be simplified. Therefore, if the voltage phase detector 24 or the voltage phase detector 24A shown in the present embodiment is used, it can contribute to cost reduction of the converter.
  • the voltage phase of the AC power supply 3 can be detected even in the converter that detects the input current instead of the bus current. Thereby, it can contribute to the cost reduction of a converter.
  • FIG. FIG. 24 is a diagram illustrating a configuration of a converter and a motor control device according to the fifth embodiment.
  • Converter 1-5 according to the fifth embodiment has the same or equivalent configuration as converter 1-4 shown in FIG. 21, and an overload detection unit 45 is further added.
  • symbol is used for the same or equivalent component, and the overlapping description is abbreviate
  • This section is a section where the motor is accelerating and is a motor power running section.
  • Time t00 is the time when the motor starts to accelerate
  • time t01 is the time when the motor speed N reaches the target speed.
  • the motor speed N and the motor output Pout increase due to the motor torque Tout.
  • the motor output Pout increases, the d-axis current Id increases in the positive direction.
  • the motor output Pout becomes constant and the peak value of the d-axis current Id also becomes constant.
  • This section is a section in which the motor speed N is a constant speed. Unlike the period from time t00 to t01, since the motor output Pout is a low value, the d-axis current Id hardly flows.
  • This section is a section where the motor is decelerating and is a motor regeneration section.
  • Time t02 is the time when the motor starts to decelerate
  • time t03 is the time when the motor stops.
  • the motor starts to decelerate
  • the regenerative power of the motor flows into the smoothing capacitor 21 and the bus voltage VPN increases.
  • the bus voltage VPN exceeds a predetermined value based on the above-described regeneration control unit 28A
  • converter 1-5 starts a power regeneration operation. Due to the power regeneration operation of converter 1-5, d-axis current Id flows in the negative direction, and bus voltage VPN decreases.
  • the magnitude of the d-axis current Id is determined by the motor output Pout. That is, a proportional relationship is established between the motor output Pout and the d-axis current Id.
  • the d-axis current Id is obtained based on the input currents Ir, Is, It. Therefore, increasing the d-axis current Id is equivalent to increasing the absolute values of the input currents Ir, Is, It.
  • the converter 1-5 If an excessive current continues to flow through the power module 22 mounted on the converter 1-5, the converter 1-5 enters an overload state. At this time, since the same current as the input currents Ir, Is, It flows through the power module 22, the power is indirectly monitored by monitoring the d-axis current Id calculated based on the input currents Ir, Is, It. The current flowing through the module 22 can be detected. Since the input currents Ir, Is, and It are alternating currents, they flow in both positive and negative directions regardless of motor power running or motor regeneration. On the other hand, in the case of the d-axis current Id, a current flows in a positive direction during motor power running, and a current flows in a negative direction during motor regeneration.
  • FIG. 26 is a diagram illustrating a configuration example of the overload detection unit 45 illustrated in FIG.
  • the overload detection unit 45 includes a comparator 190, a comparator 191 and an OR circuit 192.
  • the d-axis current upper limit value Idmax is input to the minus input terminal of the comparator 190, and the d-axis current Id is input to the plus input terminal of the comparator 190.
  • the d-axis current lower limit value Idmin is input to the plus input terminal of the comparator 191, and the d-axis current Id is input to the minus input terminal of the comparator 191.
  • the output signals of the comparator 190 and the comparator 191 are input to the input terminal of the OR circuit 192, and the output signal of the OR circuit 192 is handled as the output signal of the overload detection unit 45.
  • the overload detection unit 45 outputs a high level signal
  • the converter 1-5 is determined to be in an overload state
  • the overload detection unit 45 outputs a low level signal
  • the converter 1-5 5 is determined not to be overloaded.
  • the d-axis current upper limit value Idmax and the d-axis current lower limit value Idmin are determined by the current capacity or electrical specifications of the power module 22 mounted on the converter 1-5.
  • the d-axis current upper limit value Idmax is a current limit value during powering operation
  • the d-axis current lower limit value Idmin is a current limit value during regenerative operation.
  • the comparator 190 when the d-axis current Id becomes equal to or higher than the d-axis current upper limit value Idmax, the comparator 190 outputs a high level signal, and the logical sum circuit 192 receives a high level signal. As a result, the OR circuit 192 outputs a high level signal, and the overload detection unit 45 outputs a high level signal.
  • the comparator 191 When the d-axis current Id becomes equal to or lower than the d-axis current lower limit value Idmin, the comparator 191 outputs a High level signal, and the OR circuit 192 receives a High level signal. As a result, the OR circuit 192 outputs a high level signal, and the overload detector 45 outputs a high level signal.
  • the signal output from the overload detection unit 45 is notified to the motor drive device 4 or the host control device 100 via a communication line (not shown).
  • converter 1-5 As described above, in converter 1-5 according to the fifth embodiment, the load state of converter 1-5 during motor power running and motor regeneration is monitored based on d-axis current Id, and based on the monitoring result. Thus, it is determined whether converter 1-5 is in an instantaneous overload state.
  • the cost of the power supply phase detector can be reduced, and a simple configuration of monitoring the converter overload state with the d-axis current Id can be realized. It can contribute to the conversion.
  • whether or not the instantaneous overload state is determined only by the d-axis current Id that is proportional to the motor output Pout, but whether or not the instantaneous overload state is also determined using the q-axis current Iq. It may be determined.
  • both the d-axis current Id and the q-axis current Iq both the effective current and the reactive current can be monitored.
  • the energization state of converter 1-5 can be more accurately determined, and therefore it is possible to more accurately determine whether or not it is an instantaneous overload state.
  • FIG. FIG. 27 is a diagram illustrating a configuration of a converter and a motor control device according to the sixth embodiment.
  • Converter 1-6 according to the sixth embodiment has the same or equivalent configuration as converter 1-5 shown in FIG. 24, and overload detector 45 in FIG. 24 is replaced with overload detector 45A in FIG. ing.
  • symbol is used for the same or equivalent component, and the overlapping description is abbreviate
  • the overload detection unit 45A has a function of detecting a steady-state overload of the converter 1-6 based on the d-axis current Id. Information on whether or not converter 1-6 is in an overload state is notified to motor drive device 4 or host controller 100 (not shown in FIG. 27) (see FIG. 34).
  • the host control device 100 is a device that transmits a motor operation command to the motor drive device 4.
  • steady-state overload protection for power converters such as converters and inverters estimates the temperature of components mounted on the power converter, and when the estimated temperature exceeds the temperature to be protected, The power converter is protected by determining that it is in an overload state and stopping the operation of the power converter.
  • components mounted on the power converter include a power element group and a capacitor related to power supply to the motor.
  • FIG. 28 is a waveform diagram for explaining steady-state overload protection in the sixth embodiment.
  • the horizontal axis is the energization current I of the power converter
  • the vertical axis is the allowable energization time Ta
  • This overload protection characteristic is used when obtaining the time until the temperature rise due to the energization reaches the temperature to be protected when the power conversion device is energized continuously with a certain energization current I.
  • the value on the vertical axis at the intersection of the straight line drawn in parallel to the vertical axis from the point on the horizontal axis representing the value of a certain energization current I and the overload protection curve shown is set as the temperature to be protected. .
  • the calculated temperature rise estimated value Kc is input to the minus input terminal of the comparator 195.
  • the threshold temperature Kref is input to the plus input terminal of the comparator 195, and a signal indicating the magnitude relationship between the temperature rise estimated value Kc and the threshold temperature Kref becomes the output signal of the comparator 195, and the output of the comparator 195 The signal becomes an output signal of the overload detection unit 45A.
  • FIG. 30 is a first waveform diagram for explaining the operation of the temperature rise estimation unit 194 in the sixth embodiment
  • FIG. 31 is a second waveform for explaining the operation of the temperature rise estimation unit 194 in the sixth embodiment.
  • FIG. 30 shows the temperature rise Ka of the power module 22 when the d-axis current Id of the converter 1-6 continues to flow at a constant value.
  • FIG. 31 shows the temperature rise Kb of the smoothing capacitor 21 when the d-axis current Id of the converter 1-6 continues to flow at a constant value.
  • the horizontal axis represents time.
  • the temperature rise estimation unit 194 calculates the temperature rise estimated value Kc of the power module 22 and the smoothing capacitor 21 by using the d-axis current absolute value
  • Id the d-axis current absolute value
  • several-order delay filters are IIR filters and moving average filters.
  • the overload detection unit 45A estimates the temperature rise of the components mounted on the converter 1-6 based on the d-axis current Id, and the temperature rise estimated value Kc provided in advance is equal to or higher than the threshold temperature Kref. In this case, it is determined that the steady state overload state is established, and when the estimated temperature rise Kc is smaller than the threshold temperature Kref, it is determined that the steady state overload state is not established.
  • the overload detection unit 45A outputs a High level signal and notifies the motor drive device 4 or the host control device 100 via the communication path.
  • the overload detection unit 45A outputs a Low level signal. The high level signal and the low level signal are notified to the motor driving device 4 or the host control device 100 via the communication path.
  • converter 1-6 As described above, in converter 1-6 according to the sixth embodiment, the load state of converter 1-6 is monitored based on d-axis current Id, and based on the monitoring result, converter 1-6 performs overload during normal operation. It is determined whether or not it is in a state.
  • the cost of the power supply phase detector can be reduced, and a simple configuration in which the overload state of the converter is monitored with the d-axis current Id can be realized. It can contribute to the conversion.
  • Embodiment 6 it is determined whether or not the steady-state overload state is based only on the d-axis current Id that is proportional to the motor output Pout, but the steady-state overload state is also determined using the q-axis current Iq. It may be determined whether or not.
  • the steady-state overload state is also determined using the q-axis current Iq. It may be determined whether or not.
  • both the d-axis current Id and the q-axis current Iq both the effective current and the reactive current can be monitored.
  • the energization state of converter 1-6 can be determined more accurately, and therefore it can be determined more accurately whether or not the steady-state overload state is present.
  • FIG. 32 is a diagram illustrating a configuration of a converter and a motor control device according to the seventh embodiment.
  • Converter 1-7 according to the seventh embodiment shown in FIG. 32 is identical to converter 1-5 according to the fifth embodiment shown in FIG. 24 in the configuration of bus voltage detector 23, base drive signal generator 26, and regeneration controller. While the illustration of 28A is omitted, a motor control unit 4A is added inside the motor driving device 4.
  • Other configurations are the same as or equivalent to those in FIG. 24, and the same or equivalent components are denoted by the same reference numerals.
  • the motor control unit 4A has a function of supplying arbitrary AC power to the motor 5 and controlling the motor 5 at a variable speed.
  • the output of the overload detection unit 45 in the converter 1-7 is configured to be input to the motor control unit 4A via the communication path 46.
  • the overload detection unit 45 described in the fifth embodiment that is, the overload detection unit 45 having a function of determining the instantaneous overload state is used.
  • the overload detection unit 45 described in the sixth embodiment is used. It may be replaced with a load detection unit 45A, that is, an overload detection unit 45A having a function of determining a steady-state overload state, or it has both an instantaneous overload state determination function and a steady-state overload state determination function.
  • An overload detection unit may be used.
  • the input current detection unit 25A detects the currents Ir, Is, It input to the power module 22 and inputs the detected input currents Ir, Is, It to the RST-dq coordinate conversion unit 44.
  • the RST-dq coordinate conversion unit 44 calculates the d-axis current Id and the q-axis current Iq based on the R-phase phase ⁇ r and the power supply angular frequency ⁇ of the AC power supply 3 detected by the voltage phase detection unit 24, and d
  • the shaft current Id is input to the overload detection unit 45.
  • Overload detection unit 45 determines whether converter 1-7 is in an overload state based on d-axis current Id. When it is determined that converter 1-7 is in an overload state and overload detection unit 45 outputs a high level signal, motor control unit 4A controls AC power so as to reduce the output of motor 5.
  • the following method is illustrated as a method for reducing the output of the motor 5.
  • Control is performed so that the motor 5 is operated with a torque command that is more limited than the torque command previously determined by the motor operation command.
  • Control the motor 5 so that it operates with a rotation command that is more limited than the rotation command previously determined by the motor operation command.
  • Control the motor 5 to free run Specifically, the switching operation for on / off control of a switching element (not shown) provided in the motor driving device 4 is stopped, and the motor 5 is brought into a free state.
  • FIG. 33 is a flowchart showing operations of the converter and the motor control unit according to the seventh embodiment.
  • the notation of the reference numerals is omitted.
  • the RST-dq coordinate conversion unit 44 generates a d-axis current based on the input currents Ir, Is, It detected by the input current detection unit 25A, the R phase phase ⁇ r calculated by the voltage phase detection unit 24, and the power source angular frequency ⁇ . Id is calculated (step S101).
  • Overload detection unit 45 determines whether converter 1-7 is in an overload state based on d-axis current Id (step S102). The overload detection unit 45 notifies the determination result to the motor control unit 4A in the motor drive device 4 through the communication path 46 (step S103).
  • the processing in steps S101 to S103 described above is the processing of converter 1-7, and converter 1-7 repeatedly executes the processing in steps S101 to S103.
  • the motor control unit 4A receives the determination result of the overload detection unit 45 (step S104). Based on the received determination result, motor control unit 4A determines whether converter 1-7 is in an overload state (step S105). In the case of a signal indicating that the received determination result is an overload state (High level signal in the example of Embodiment 5) (Yes in Step S105), the motor driving device is configured so that the output of the motor 5 is limited. The motor output from 4 is limited (step S106), and the AC power with the output of the motor 5 limited is output to the motor 5 (step S107).
  • step S105 the process proceeds to step S107 without performing the process in step S106. Transition. That is, when the received determination result is not an overload state, the AC power in the normal control operation is output to the motor 5 without limiting the output of the motor 5 (step S107).
  • steps S104 to S107 described above are the processes of the motor control unit 4A, and the motor control unit 4A repeatedly executes the processes of steps S104 to S107.
  • the seventh embodiment even if the operation of the motor 5 exceeds the expected value and the converter 1-7 is in an overload state, the AC power is applied so that the motor driving device 4 reduces the output of the motor 5. Therefore, the overload state of the converter 1-7 can be eliminated, and adverse effects such as deterioration and damage of the converter 1-7 can be eliminated without stopping the system. Therefore, a converter having a small capacity can be selected, which can contribute to cost reduction of the industrial machine.
  • FIG. 34 is a diagram illustrating a configuration of a converter and a motor control device according to the eighth embodiment. 34, in the configuration of converter 1-7 according to the seventh embodiment shown in FIG. 32, a host controller 100, a motor drive device 400, and a motor 500 instead of the motor 5 are added.
  • the host controller 100 has a function of outputting a motor operation command to each of the motor drive devices 4 and 400 via the communication paths 47a and 47b, and outputs a motor operation command to each of the motor drive devices 4 and 400.
  • the output of the overload detection unit 45 in the converter 1-8 is input to the host controller 100 via the communication path 46.
  • the motor drive device 400 includes DC terminals 19 and 20 and a motor control unit 400A.
  • the DC terminals 19 and 20 are connected to the DC terminals 17 and 18 of the motor drive device 4 and are connected to the smoothing capacitor 21 in the converter 1-8. Connected.
  • the motor control unit 400A supplies variable AC power to the motor 500 to perform variable speed control.
  • the overload detection unit 45 suitable for instantaneous overload detection is shown. However, the overload detection unit 45 may be replaced with an overload detection unit 45A suitable for steady-state overload detection. You may comprise using the overload detection part provided with the function of both load detection and a steady-time overload detection.
  • the input current detection unit 25A detects the currents Ir, Is, It input to the power module 22 and inputs the detected input currents Ir, Is, It to the RST-dq coordinate conversion unit 44.
  • the RST-dq coordinate conversion unit 44 calculates the d-axis current Id and the q-axis current Iq based on the R-phase phase ⁇ r and the power supply angular frequency ⁇ of the AC power supply 3 detected by the voltage phase detection unit 24, and d
  • the shaft current Id is input to the overload detection unit 45.
  • Overload detection unit 45 determines whether converter 1-8 is in an overload state based on d-axis current Id.
  • a signal indicating that the converter is in an overload state (high level signal) is notified to host control device 100 via communication path 46.
  • the host controller 100 uses at least one of the communication paths 47a and 47b corresponding to at least one of the motor controller 4A of the motor driver 4 and the motor controller 400A of the motor driver 400, An instruction is given to generate a motor operation command that limits the output of the motor to be controlled.
  • At least one of the motor control unit 4A and the motor control unit 400A controls the AC power so as to decrease the output of the motor 5 or the motor 500 based on the received motor operation command.
  • a machine tool including a spindle motor and a servo motor is taken as an example, and it is assumed that the motor 5 is a spindle motor and the motor 500 is a servo motor.
  • the host control device 100 may be provided on the machine tool or may not be provided on the machine tool.
  • the host control device 100 outputs a motor operation command for reducing the output of the motor 5 that is a spindle motor to the motor control unit 4A.
  • the host controller 100 limits the output of the motor 500 that is a servo motor having a shorter acceleration time and deceleration time than the motor 5 that is a spindle motor. decide.
  • the host controller 100 maintains the output of the motor 5 that is a spindle motor, and outputs a motor operation command for limiting the output of the motor 500 that is a servo motor to the motor control unit 4A and the motor control unit 400A.
  • FIG. 35 is a flowchart showing operations of the converter and the motor drive device according to the eighth embodiment.
  • the notation of symbols is omitted.
  • the RST-dq coordinate conversion unit 44 generates a d-axis current based on the input currents Ir, Is, It detected by the input current detection unit 25A, the R phase phase ⁇ r calculated by the voltage phase detection unit 24, and the power source angular frequency ⁇ . Id is calculated (step S201).
  • Overload detection unit 45 determines whether converter 1-8 is in an overload state based on d-axis current Id (step S202).
  • the overload detection unit 45 notifies the host controller 100 of the determination result through the communication path 46 (step S203).
  • the processes in steps S201 to S203 described above are the processes of converter 1-8, and converter 1-8 repeatedly executes the processes in steps S201 to S203.
  • the host control device 100 receives the determination result of the overload detection unit 45 (step S204). Based on the received determination result, host controller 100 determines whether converter 1-8 is in an overload state (step S205). In the case of a signal indicating that the received determination result is an overload state (High level signal in the example of Embodiment 5) (Yes in Step S205), the output of at least one of the motor 5 and the motor 500 is limited. (Step S206), and outputs a motor operation command that restricts the output of the motor to the motor drive device that drives the motor to be controlled (step S207).
  • step S205 the process proceeds to step S207 without performing the process in step S206. Transition. That is, when the received determination result is not an overload state, the output restriction on the motor 5 and the motor 500 is not performed, and a normal motor operation command is output (step S207).
  • the above steps S204 to S207 are the processes of the host control apparatus 100, and the host control apparatus 100 repeatedly executes the processes of steps S204 to S207.
  • the motor control unit 4A of the motor drive device 4 and the motor control unit 400A of the motor drive device 400 receive the motor operation command from the host control device 100 (step S208), and AC power is supplied to the motor according to the received motor operation command. 5 and the motor 500 so as to be output (step S209).
  • the processes of steps S208 and S209 described above are the processes of the motor control units 4A and 400A, and the motor control units 4A and 400A repeatedly execute the processes of steps S208 and S209.
  • the host control device 100 performs at least one of the motor 5 and the motor 500.
  • a motor operation command that restricts one output is output to the corresponding motor drive device, and the motor drive device controls the AC power so as to decrease the motor output to be controlled. It is possible to eliminate the adverse effects such as deterioration and damage of the converter 1-8 without stopping the system. Further, in an industrial machine using a plurality of motors such as machine tools, by outputting a motor operation command so as to prevent the cycle time from becoming long, the cycle time can be maintained while maintaining the cycle time. An overload condition can be eliminated. Therefore, a converter having a small capacity can be selected, which can contribute to cost reduction of the industrial machine.
  • FIG. 36 is a diagram illustrating a configuration of a converter and a motor control device according to the ninth embodiment.
  • the configuration is the same as or equivalent to the configuration of converter 1-8 according to the eighth embodiment shown in FIG. 34, but converter control unit 1A is added inside converter 1-9, and inside converter control unit 1A.
  • An overload detection unit 45B is provided.
  • the overload detection unit 45B is an overload detection unit having functions of both instantaneous overload detection and steady state overload detection.
  • the host control device 100, the motor driving device 400, the motor driving device 4, and the converter 1-9 are daisy chain connected via a communication path.
  • converter control unit 1A of converter 1-9 and motor control unit 4A of motor drive device 4 are connected via communication path 46, and motor control unit 4A of motor drive device 4 and motor control of motor drive device 400 are controlled.
  • the unit 400A is connected via a communication path 48a, and the motor control unit 400A of the motor driving device 400 and the host control apparatus 100 are connected via a communication path 48b.
  • a motor operation command output from the host control device 100 to the motor drive device 4 is input to the motor control unit 4A of the motor drive device 4 via the motor control unit 400A of the motor drive device 400. Will be.
  • a plurality of motors are generally operated at a high output.
  • a machine tool including a plurality of servo motors and spindle motors is taken as an example.
  • the spindle motor is the motor 5 and the servo motor is the motor 500.
  • the output of a spindle motor is generally larger than that of a servo motor. For this reason, the ratio of the electric power supplied from the converter to each motor driving device is increased by the spindle motor driving device. In the case of the simultaneous acceleration / deceleration operation as described above, the power supplied to the converter can be quickly reduced by reducing the output of the motor 5 that is a spindle motor without using the host controller 100.
  • the steady-state overload state is not a state in which the converter supplies excessive power, but the operating cycle of industrial machinery is severe, and the temperature rises in components such as power modules and smoothing capacitors mounted on the converter due to long-term operation. Is a case where the temperature exceeds the allowable temperature. In such a case, it is necessary to review the operation cycle.
  • the motor operation command for the motor 5 that is the spindle motor or the motor 500 that is the servo motor, or the motor operation command for both via the host controller 100 the operation cycle is reviewed. It is suitable to reduce the sum of the average output of the motor in operation.
  • FIG. FIG. 37 is a flowchart illustrating operations of the converter, the motor drive device, and the host control device according to the ninth embodiment.
  • the RST-dq coordinate conversion unit 44 generates a d-axis current based on the input currents Ir, Is, It detected by the input current detection unit 25A, the R phase phase ⁇ r calculated by the voltage phase detection unit 24, and the power source angular frequency ⁇ . Id is calculated (step S301). Based on the d-axis current Id, the overload detection unit 45B determines whether the converter 1-9 is in an instantaneous overload state, a steady state overload state, or no abnormality, that is, an overload of the converter 1-9. The load state is determined (step S302). The overload detection unit 45B notifies the determination result to the motor control unit 4A via the communication path 46 (step S303).
  • the processing in steps S301 to S303 described above is the processing of converter 1-9, and converter 1-9 repeatedly executes the processing in steps S301 to S303.
  • the motor control unit 4A receives the determination result of the overload detection unit 45B (step S304). Based on the received determination result, motor control unit 4A determines whether converter 1-9 is in an instantaneous overload state (step S305). When the received determination result is a signal indicating that the instantaneous overload state is present (step S305, Yes), the motor output from the motor driving device 4 is limited so that the output of the motor 5 is limited (step S306). The AC power whose motor output is limited is output to the motor 5 (step S307). In addition, when the received determination result is not an instantaneous overload state (step S305, No), it transfers to step S307, without performing the process of step S306.
  • step S307 when the received determination result is not in the instantaneous overload state, the AC power in the normal control operation is output to the motor 5 without limiting the output of the motor 5 (step S307). Further, the motor control unit 4A notifies the determination result of the overload detection unit 45B to the motor control unit 400A (step S308).
  • steps S304 to S308 described above are the processes of the motor control unit 4A, and the motor control unit 4A repeatedly executes the processes of steps S304 to S308.
  • the motor control unit 400A receives the determination result of the overload detection unit 45B from the motor control unit 4A via the communication path 48a (step S309), and notifies the determination result to the host controller 100 via the communication path 48b (step S309). S310).
  • the processes of steps S309 and S310 described above are the processes of the motor control unit 400A, and the motor control unit 400A repeatedly executes the processes of steps S309 and S310.
  • the host control device 100 receives the determination result of the overload detection unit 45B from the motor control unit 400A (step S311). Based on the received determination result, host controller 100 determines whether converter 1-9 is in an instantaneous overload state (step S312). When the received determination result is a signal indicating that the instantaneous overload state is present (step S312, Yes), it is determined to limit the output of the motor 500 (step S313), and the motor control unit 400A that controls the motor 500 is determined. On the other hand, a motor operation command that limits the motor output is output (step S316).
  • step S312 determines whether or not the converter 1-9 is in a steady state overload state. If the received determination result is a signal indicating that the steady-state overload state is present (step S314, Yes), the change of the operation cycle of each axis operated by the servo motor is determined (step S315), and the motor 500 is controlled. The motor operation command changed so as to suppress the average output of the motor 500 is output to the motor control unit 400A (step S316).
  • step S314, No When the received determination result is a signal indicating that the steady-state overload state is not present (step S314, No), the process proceeds to step S316 without performing the process of step S315.
  • the processes of steps S311 to S316 described above are the processes of the host controller 100, and the host controller 100 repeatedly executes the processes of steps S311 to S316.
  • the above control is summarized as follows. First, when it is determined as an instantaneous overload state, AC power is output to the motor 5 so that the motor control unit 4 ⁇ / b> A limits the motor output without going through the host controller 100. In parallel with this control, the motor control unit 400A and the host control device 100 are notified of the instantaneous overload state. Based on the determination result, the host controller 100 generates a motor operation command for the motor 500 so as to limit the output of the motor operation of the motor 500 and outputs the motor operation command to the motor drive device 400. In the motor drive device 4, the output of the motor 5 is once limited to avoid an instantaneous overload state, and thereafter, the host control device 100 reviews the motor operation command again.
  • the motor control unit 4A continues the operation command based on the motor operation command output from the host control device 100, and in parallel with this, the motor control unit 400A and the host control unit The control device 100 is notified that it is in a steady state overload state. Based on the determination result, host controller 100 generates a motor operation command so as to limit the average output in the motor operation of motor 500 and outputs the motor operation command to motor drive device 400.
  • the output limit for the motor 5 is limited when it is determined as an instantaneous overload state
  • the output limit for the motor 500 is limited when it is determined as a steady state overload state.
  • the output of both the motor 5 and the motor 500 may be limited.
  • output restriction may be performed on both the motor 5 and the motor 500.
  • the overload detection unit 45B can detect an instantaneous overload state and a steady-state overload state, respectively.
  • a dedicated communication line for overload detection is provided. It may be provided, or a method of notifying an overload state by serial communication or the like may be used.
  • the motor output can be quickly reduced.
  • the severe operation cycle is improved by reviewing the motor operation command output from host controller 100 to each motor drive device, and installed in converter 1-9.
  • the temperature rise of the power module 22 and the smoothing capacitor 21 can be reduced.
  • adverse effects such as deterioration and damage of the converter 1-9 can be solved without stopping the system.
  • an industrial machine using a plurality of motors such as machine tools, by outputting a motor operation command so as to prevent the cycle time from becoming long, the cycle time can be maintained while maintaining the cycle time. An overload condition can be eliminated. Therefore, a converter having a small capacity can be selected, which can contribute to cost reduction of the industrial machine.
  • FIG. FIG. 38 is a diagram illustrating a configuration of a converter and a motor control device according to the tenth embodiment.
  • the converter 1-10 according to the tenth embodiment has the same configuration as the converter 1-3 shown in FIG. 19 shown in the third embodiment, but the bus voltage detection unit 23, the voltage phase detection unit 24, the bus current detection While the illustration of the unit 25, the base drive signal generation unit 26, and the regeneration control unit 28 is omitted, a power failure detection unit 50 is added inside the converter 1-10.
  • a motor drive device 400, a motor 500, and a host control device 100 are added as in the eighth and ninth embodiments. Further, in the configuration of FIG.
  • a DC voltage detector 82 for detecting the voltage between the DC terminals 17-18 is arranged inside the motor driving device 4, and the DC terminal is provided inside the motor driving device 400.
  • a DC voltage detector 83 for detecting a voltage between terminals 19-20 is arranged.
  • the host control device 100, the motor drive device 400, the motor drive device 4, and the converter 1-10 are daisy chain connected via a communication path.
  • the power failure detection unit 50 of the converter 1-10 and the motor control unit 4A of the motor drive device 4 are connected via a communication path 85, and the motor control unit 4A of the motor drive device 4 and the motor control of the motor drive device 400 are controlled.
  • the unit 400A is connected by a communication path 86a, and the motor control unit 400A of the motor driving device 400 and the host control apparatus 100 are connected by a communication path 86b.
  • a motor operation command output from the host control device 100 to the motor drive device 4 is input to the motor control unit 4A of the motor drive device 4 via the motor control unit 400A of the motor drive device 400. Will be.
  • the power failure detection unit 50 detects a power failure of the AC power source 3 based on the output signal of the input voltage detection unit 43, and drives the motor via the communication paths 85, 86a, 86b. A function of notifying the power failure information to the device 4, the motor drive device 400, and the host control device 100 is provided.
  • the motor control unit 4A has a function of controlling the motor 5 at a variable speed by supplying arbitrary AC power to the motor 5, and a function of receiving a detection signal of the DC voltage detection unit 82.
  • the motor control unit 400A has a function of controlling the motor 500 at a variable speed by supplying arbitrary AC power to the motor 500, and a function of receiving a detection signal of the DC voltage detection unit 83. Note that the detection signal of the DC voltage detection unit 82 and the detection signal of the DC voltage detection unit 83 are the same as the voltage across the smoothing capacitor 21, that is, the detection value of the bus voltage detection unit 23.
  • the motor 5 or 500 is operating when a power failure occurs, it is necessary to stop the operating motor.
  • the motor is decelerated, the regenerative power of the motor is accumulated in the smoothing capacitor 21 of the converter 1-10, and the bus voltage VPN increases.
  • the power supply regeneration operation may be performed by operating the switching elements S1 to S6 of the power module 22, but the power regeneration operation cannot be performed for the above-described reason.
  • the bus voltage VPN further increases. Therefore, when the bus voltage VPN exceeds a certain value, it is determined that the voltage is an overvoltage, and the control of each motor must be stopped. In this case, it takes time until each motor stops, and for example, the feed shaft of the machine tool may collide with the shaft end.
  • the determination result of the power failure detection unit 50 of the converter 1-10 is transmitted to the motor control unit 4A, the motor control unit 400A, and the host control via the communication paths 85, 86a, 86b. Notify the device 100.
  • the motor control unit 4 ⁇ / b> A controls the AC power supplied to the motor 5 based on the detection value of the DC voltage detection unit 82. Further, the motor control unit 400A supplies AC power so as to decelerate and stop the motor 500.
  • the motor 5 is a spindle motor and the motor 500 is a servo motor
  • the operation of the motor 5 corresponding to the spindle motor is controlled to keep the bus voltage VPN at an appropriate value so that the motor 500 corresponding to the servo motor can be safely decelerated and stopped.
  • the DC voltage detector 82 is the same as the bus voltage VPN detected by the bus voltage detector 23. For this reason, the detection value of the DC voltage detection unit 82 is handled as the bus voltage VPN.
  • a bus voltage determination circuit that determines the bus voltage VPN is configured inside the motor control unit 4A. The motor control unit 4A determines the AC power supplied to the motor 5 based on the determination result of the bus voltage determination circuit.
  • FIG. 39 is a diagram illustrating a configuration example of the bus voltage determination circuit according to the tenth embodiment.
  • the bus voltage determination circuit includes comparators 196 and 197.
  • the bus voltage upper limit value VPNmax is input to the negative input terminal of the comparator 196
  • the detection value VPN of the DC voltage detection unit 82 is input to the positive input terminal of the comparator 196.
  • the detected value VPN of the DC voltage detector 82 is input to the minus input terminal of the comparator 197
  • the bus voltage lower limit value VPNmin is input to the plus input terminal of the comparator 197.
  • Comparator 196 determines whether or not bus voltage VPN is equal to or higher than a predetermined bus voltage upper limit value VPNmax.
  • the comparator 197 determines whether or not the bus voltage VPN is equal to or lower than a predetermined bus voltage lower limit value VPNmin.
  • the bus voltage VPN is larger than an appropriate value, and the bus voltage VPN needs to be lowered. .
  • the motor 5 corresponding to the spindle motor is accelerated, the motor 5 becomes a power running operation, and the bus voltage VPN can be lowered.
  • the comparator 196 outputs a low level signal and the comparator 197 outputs a high level signal, the bus voltage VPN is in a state of being lower than an appropriate value, and the bus voltage VPN needs to be raised. There is. In this case, if the motor 5 corresponding to the spindle motor is decelerated, the motor 5 performs a regenerative operation, and the bus voltage VPN can be increased.
  • FIG. 40 is a flowchart showing an operation of converter 1-10 in the tenth embodiment.
  • FIG. 41 is a flowchart showing the operation of the motor control unit 4A in the tenth embodiment.
  • FIG. 42 is a flowchart illustrating the operation of the motor control unit 400A according to the tenth embodiment. 40 to 42, the respective flowcharts are individually shown. However, it is also possible to show them in one figure as shown in FIG.
  • the input voltage detection unit 43 detects the input voltage of the AC power supply 3 as described above (step S401).
  • the power failure detection unit 50 determines whether or not a power failure has occurred in the AC power supply 3 based on the output signal of the input voltage detection unit 43 (step S402).
  • the power failure detection unit 50 notifies the determination result to the motor control unit 4A inside the motor drive device 4 via the communication path 85 (step S403).
  • the processes in steps S401 to S403 described above are the processes of converter 1-10, and converter 1-10 repeatedly executes the processes in steps S401 to S403.
  • the motor control unit 4A receives the determination result of the power failure detection unit 50 (step S501).
  • the motor control unit 4A notifies the received determination result to the motor control unit 400A (step S502), and determines whether or not a power failure has occurred in the AC power supply 3 based on the received determination result (step S503).
  • the motor control unit 4A determines whether the bus voltage VPN detected by the DC voltage detection unit 82 is equal to or higher than the bus voltage upper limit value VPNmax. It is determined whether or not (step S504).
  • the motor The control unit 4A controls the motor 5 to accelerate (step S508), and outputs AC power to the motor 5 (step S509).
  • the motor control unit 4A determines that the bus voltage VPN is the bus voltage. It is determined whether it is below the lower limit value VPNmin (step S505).
  • the bus voltage VPN is equal to or lower than the bus voltage lower limit value VPNmin (in the tenth embodiment, when the output signal of the comparator 196 is low level and the output signal of the comparator 197 is high level) (step S505, Yes)
  • the motor control unit 4A Controls the motor 5 to decelerate (step S507), and outputs AC power to the motor 5 (step S509).
  • the bus voltage VPN is larger than the bus voltage lower limit value VPNmin (in the tenth embodiment, the output signal of the comparator 197 is low level, but in step S505, the output signals of the comparator 196 and the comparator 197 are both In the case of low level) (step S505, No), the motor control unit 4A stops the power supply to the motor 5 and free-runs the motor 5 (step S506), and the motor 5 is generated based on step S506. AC power is output (step S509). In this control, since the motor 5 is free running, the power supply is stopped.
  • step S501 If it is determined in step S501 that the determination result is a signal indicating that a power failure has not occurred, the processing in steps S504 to S508 is skipped, and the processing in step S509 is performed. That is, the motor control unit 4A outputs alternating current power to operate the motor 5 in accordance with the motor operation command transmitted from the host control device 100.
  • the above steps S501 to S509 are the processes of the motor control unit 4A, and the motor control unit 4A repeatedly executes the processes of steps S501 to S509.
  • the motor control unit 4A stops the power supply to the motor 5 and free-runs the motor 5.
  • the motor 5 may be controlled to maintain a constant speed.
  • the motor control unit 400A receives a determination result regarding the presence or absence of a power failure from the motor control unit 4A via the communication path 86a (step S601).
  • the motor control unit 400A notifies the determination result regarding the presence or absence of a power failure to the host control device 100 via the communication path 86b (step S602).
  • the motor control unit 400A determines whether or not a power failure has occurred in the AC power supply 3 based on the determination result received in step S601 (step S603).
  • step S603 When the received determination result is a signal indicating that a power failure has occurred (step S603, Yes), the motor control unit 400A changes the motor operation command to decelerate the motor 500 (step S604), and AC power based on the changed motor operation command is output (step S605).
  • the motor control unit 400A skips the process in step S604 and performs the process in step S605. That is, the motor control unit 400A outputs AC power for operating the motor 500 in accordance with the motor operation command transmitted from the host control device 100 (step S605).
  • the above steps S601 to S605 are the processing of the motor control unit 400A, and the motor control unit 400A repeatedly executes the processing of steps S601 to S605.
  • the motor driving device 4 and the motor driving device 400 when a power failure occurs in the AC power source 3, the motor driving device 4 and the motor driving device 400, for example, drive the motor 500 that drives the feed shaft without passing through the host control device 100 that outputs a motor operation command. It can be stopped immediately.
  • the motor control unit 400A receives a power failure detection signal, the motor 500 is decelerated.
  • the bus voltage VPN increases.
  • the bus voltage VPN becomes an overvoltage or low voltage.
  • the motor 500 can be stopped. Since the input voltage detection unit 43 detects the signal shown in the third embodiment, it can be realized at low cost, and the power failure detection unit 50 can also be realized at low cost.
  • control functions in the converter and the motor driving device described in the first to tenth embodiments may be configured by hardware using a photocoupler, a logic IC, or the like.
  • a circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, a combination of these, or a software may be used.
  • the configuration shown in the above embodiment shows an example of the content of the present invention, and can be combined with another known technique, and can be combined without departing from the gist of the present invention. It is also possible to omit or change a part of.

Abstract

L'invention concerne un convertisseur (1-1) comprenant : un module d'alimentation (22) comprenant des bornes à courant alternatif (11, 12, 13) reliées à une alimentation en courant alternatif (3), une borne à courant continu (14) et une borne à courant continu (15), et une pluralité d'éléments de commutation ; un circuit d'attaque de base (27) ; et une unité d'alimentation électrique de commande (29). Le convertisseur (1-1) comprend une unité de détection de phase de tension (24) qui détecte une phase de tension d'une tension alternative sur la base d'un signal circulant vers les émetteurs d'une pluralité d'éléments de commutation reliés à la borne à courant continu (14) ou un signal circulant vers la terre et servant de potentiel de référence pour l'unité d'alimentation électrique de commande (29), et génère et délivre un signal de détection de phase indiquant la phase de la tension détectée. Le convertisseur (1-1) comprend une unité de génération de signal d'attaque de base (26) qui génère, sur la base du signal de détection de phase, un signal d'attaque pour commander des opérations d'activation/désactivation d'une pluralité d'éléments de commutation.
PCT/JP2019/003034 2018-06-11 2019-01-29 Convertisseur et dispositif de commande de moteur WO2019239628A1 (fr)

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CN201980037731.4A CN112219348A (zh) 2018-06-11 2019-01-29 转换器及电动机控制装置
JP2019528930A JP6608096B1 (ja) 2018-06-11 2019-01-29 コンバータ及びモータ制御装置
TW108119130A TWI705647B (zh) 2018-06-11 2019-06-03 變換器及馬達控制裝置

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PCT/JP2018/022280 WO2019239469A1 (fr) 2018-06-11 2018-06-11 Convertisseur
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022113732A1 (fr) * 2020-11-27 2022-06-02 オリエンタルモーター株式会社 Dispositif de commande de moteur

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230139257A1 (en) * 2020-04-20 2023-05-04 Hitachi Industrial Equipment Systems Co., Ltd. Power Conversion Device
US11721973B2 (en) 2020-08-12 2023-08-08 Global Mixed-Mode Technology Inc. Overvoltage protection circuit
TWI764235B (zh) * 2020-08-13 2022-05-11 致新科技股份有限公司 過壓保護電路
TWI787845B (zh) * 2021-05-27 2022-12-21 應能科技股份有限公司 變頻器
TWI776564B (zh) * 2021-06-25 2022-09-01 台達電子工業股份有限公司 單相與三相兼容的交流直流轉換電路及其放電控制方法
TWI784862B (zh) * 2022-01-10 2022-11-21 茂達電子股份有限公司 馬達電流保護電路

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008061322A (ja) * 2006-08-30 2008-03-13 Hitachi Appliances Inc 三相コンバータ・インバータ装置及びモジュール
JP2008301579A (ja) * 2007-05-29 2008-12-11 Hitachi Appliances Inc 冷凍サイクル圧縮機駆動用の電力変換装置及びそれを用いた冷凍装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4094412B2 (ja) * 2002-11-27 2008-06-04 三菱電機株式会社 電源回生コンバータ
JP5166389B2 (ja) * 2009-11-04 2013-03-21 山洋電気株式会社 モータ駆動用電源装置及び該電源装置を用いた回生方法
CN102783007B (zh) * 2010-03-31 2015-08-05 日立空调·家用电器株式会社 转换器装置、马达驱动用模块以及冷冻机
JP5664588B2 (ja) * 2012-04-20 2015-02-04 株式会社安川電機 電源回生装置および電力変換装置
JP5480351B2 (ja) * 2012-09-25 2014-04-23 山洋電気株式会社 モータ制御装置
WO2014192084A1 (fr) * 2013-05-28 2014-12-04 三菱電機株式会社 Convertisseur de puissance, dispositif de commande d'entraînement de moteur pourvu d'un convertisseur de puissance, compresseur et ventilateur pourvus d'un dispositif de commande d'entraînement de moteur et climatiseur pourvu d'un compresseur ou d'un ventilateur
JP6364205B2 (ja) * 2014-02-28 2018-07-25 日立ジョンソンコントロールズ空調株式会社 アクティブフィルタ、モータ駆動装置、圧縮機及びこれらを用いた冷凍装置
US20180145602A1 (en) * 2014-05-05 2018-05-24 Rockwell Automation Technologies, Inc. Motor drive with silicon carbide mosfet switches
CN104065324B (zh) * 2014-07-01 2016-09-21 北京航空航天大学 基于前置变换器级联三电平逆变器的三相交流电机功率驱动控制器
JP6193831B2 (ja) * 2014-09-19 2017-09-06 ファナック株式会社 機械の保護動作開始判定機能を有するモータ制御装置
WO2017033320A1 (fr) * 2015-08-26 2017-03-02 三菱電機株式会社 Convertisseur à récupération pour alimentation, et dispositif de commande de moteur
CN205622493U (zh) * 2016-01-22 2016-10-05 珠海格力节能环保制冷技术研究中心有限公司 用于控制压缩机的系统和压缩机
JP6277246B1 (ja) * 2016-10-03 2018-02-07 本田技研工業株式会社 変換装置、機器及び制御方法
CN109792214B (zh) * 2016-10-05 2021-03-19 江森自控科技公司 具有次级绕组的变速驱动装置
CN108123593B (zh) * 2018-01-29 2023-11-28 广东美的制冷设备有限公司 Pfc电路、电机控制系统及变频空调器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008061322A (ja) * 2006-08-30 2008-03-13 Hitachi Appliances Inc 三相コンバータ・インバータ装置及びモジュール
JP2008301579A (ja) * 2007-05-29 2008-12-11 Hitachi Appliances Inc 冷凍サイクル圧縮機駆動用の電力変換装置及びそれを用いた冷凍装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022113732A1 (fr) * 2020-11-27 2022-06-02 オリエンタルモーター株式会社 Dispositif de commande de moteur

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