WO2009139505A1 - 交流電圧制御装置 - Google Patents
交流電圧制御装置 Download PDFInfo
- Publication number
- WO2009139505A1 WO2009139505A1 PCT/JP2009/059392 JP2009059392W WO2009139505A1 WO 2009139505 A1 WO2009139505 A1 WO 2009139505A1 JP 2009059392 W JP2009059392 W JP 2009059392W WO 2009139505 A1 WO2009139505 A1 WO 2009139505A1
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- WIPO (PCT)
- Prior art keywords
- semiconductor switch
- voltage
- reverse conducting
- conducting semiconductor
- capacitor
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4233—Arrangements for improving power factor of AC input using a bridge converter comprising active switches
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/425—Arrangements for improving power factor of AC input using a single converter stage both for correction of AC input power factor and generation of a high frequency AC output voltage
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- 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
- the present invention relates to an AC voltage control device connected between an AC power supply and an inductive load, and the adjustment of the load voltage is controlled by a magnetic energy regeneration switch.
- the present invention relates to an AC voltage control apparatus.
- the power energy system is an important social infrastructure that cannot be stopped instantaneously, but the stability and control of the load voltage is important.
- short-term overcurrent such as rush current when the incandescent lamp is lit, induction motor startup rush, and saturation inrush current during initial transformer inrush, etc.
- the supply side supplies a high voltage because it may cause a failure in healthy operation.
- the power supply system as a countermeasure against the voltage drop of the distribution line at the maximum load, there is a tendency to supply the voltage excessively by several%, but the frequency of the maximum load is usually not so high, so the voltage is rated. Often, the larger portion is consumed unnecessarily.
- the power is converted from AC to DC, and then the voltage is controlled to be constant by the DC voltage regulator.
- the technology to do the same thing on the AC side uses iron resonance.
- the disadvantage of the AC voltage regulator by Siris Yu is that the current waveform is distorted, and that the voltage control results in the current having a delayed power factor (a state in which the current is behind the voltage).
- a delay rate load such as an inductive load, a high voltage is generated when the voltage is interrupted, and the voltage noise is also a problem.
- M E R S magnetic energy regenerative switch
- MERS uses a switching circuit / semiconductor element that does not have reverse blocking capability, that is, reverse conduction type.
- a reverse conduction switching circuit Z semiconductor element for example, a self-extinguishing element and a diode are connected, the positive side of the self-extinguishing element is connected to the negative side of the diode, and the negative side of the self-extinguishing element is connected to a diode.
- Type switching circuit Z semiconductor element simply "reverse conduction type semiconductor switch"
- MERS is the negative side of the self-extinguishing element constituting the first reverse conducting semiconductor switch (hereinafter simply referred to as “the negative side of the reverse conducting semiconductor switch”) and the second reverse conducting semiconductor switch.
- the second reverse conducting semiconductor switch leg having the second AC terminal as the point connecting the negative side of the third reverse conducting semiconductor switch and the positive side of the fourth reverse conducting semiconductor switch is connected to the first reverse conducting semiconductor switch.
- the first reverse-conducting semiconductor switch and the fourth reverse-conducting semiconductor switch are the first pair
- the second reverse-conducting semiconductor switch and the third reverse-conducting semiconductor switch are the second pair
- the self-extinguishing element that constitutes two reverse conducting semiconductor switches is blocked (hereinafter simply
- the reverse conducting semiconductor switch is in an off state”.
- the MERS When the capacitor is shut off, the capacitor absorbs the “snubber energy” stored in the entire full bridge circuit and the controlled circuit, It functions as a bidirectional current switch circuit that can be regenerated in the circuit to be controlled.
- the direction of the current flowing in the circuit to be controlled can be switched between forward and reverse depending on the purpose and range of the control.
- the capacitance of the capacitor is a capacitance that resonates with the inductance of the inductive load, and the capacitance is selected according to the control purpose-range.
- the capacitance of the capacitor so that the resonance frequency determined by the capacitance of the capacitor and the inductance of the inductive load is equal to or higher than the switching frequency of the reverse-conducting semiconductor switch,
- the self-extinguishing element constituting the reverse conducting semiconductor switch is substantially zero voltage and zero current, and when turned off, the self-extinguishing semiconductor switch constituting the reverse conducting semiconductor switch.
- the element can be soft-switching, which is at almost zero voltage.
- the ON / OFF state of the reverse conducting semiconductor switch is controlled so that the pair 2 is turned on.
- the ON / OFF time ratio (duty ratio) of the reverse conducting semiconductor switch is 0.5, That is, the on time and the off time are equal.
- the reverse conduction type semiconductor switch OFF state is expressed on the time axis as a control signal
- the phase of the control signal is synchronized with the voltage phase of the AC power supply, and the phase of the control signal is advanced from the voltage phase of the AC power supply ( The control is such that the phase of the control signal changes temporally).
- the AC power supplied to the inductive load can be controlled by changing the phase difference between the voltage phase of the control signal and the AC power supply in accordance with the purpose / range of control.
- the supply voltage to the inductive load can be increased by advancing the current phase, and the supply voltage to the inductive load can be reduced by advancing the current phase significantly. is there.
- AC voltage control device using phase advance current Proposed, published, and already publicly known (see Patent Document 3).
- Patent Document 1 Japanese Patent No. 3 6 3 4 9 8 2
- Patent Document 2 Japanese Patent No. 3 7 3 5 6 7 3
- Patent Document 3 Japanese Patent Laid-Open No. 2 0 0 7-0 5 8 6 7 6 Summary of the Invention
- the AC voltage controller using the phase advance current uses two power factor loads: a leading power factor load by the MERS circuit and another delayed power factor load that is not connected to the MERS circuit. Power factor can be improved by using.
- the present invention has been made in view of the above-described problems, and reduces the voltage burden on the reverse conduction type semiconductor switch and the capacitor of the MERS circuit and reduces the phase advance amount of the current supplied to the inductive load.
- An object of the present invention is to provide an AC voltage control device capable of controlling a voltage supplied to an inductive load. Means for solving the problem
- the present invention relates to an AC voltage control device in which adjustment of a load voltage is controlled by a magnetic energy regenerative switch, and the object of the present invention is to insert in series between an AC power source and an inductive load.
- An AC voltage control device for controlling a load voltage applied to an inductive load wherein the AC voltage control device includes a self-extinguishing element and a diode, a positive electrode side of the self-extinguishing element, and a negative electrode side of the diode.
- a circuit in which the negative electrode side of the self-extinguishing element is connected to the positive electrode side of the diode, or an equivalent semiconductor element, is referred to as a reverse conducting semiconductor switch (hereinafter simply referred to as “reverse conducting semiconductor switch”).
- the negative side of the self-extinguishing element constituting the first reverse conducting semiconductor switch (hereinafter simply referred to as the negative side of the reverse conducting semiconductor switch) and the second reverse conducting semiconductor
- the positive electrode side of the self-turn-off elements constituting the Itchi (hereinafter, simply "reverse This is referred to as the positive electrode side of a conductive semiconductor switch. )
- Connect the first reverse conducting semiconductor switch leg with the point connected to the first AC terminal, the negative side of the third reverse conducting semiconductor switch and the positive side of the fourth reverse conducting semiconductor switch Connect the positive side of the first reverse conducting semiconductor switch to the positive side of the third reverse conducting semiconductor switch by connecting the second reverse conducting type semiconductor switch leg with this point as the second AC terminal.
- a full bridge circuit configured as a negative terminal by connecting the negative side of the second reverse conducting semiconductor switch and the negative side of the fourth reverse conducting semiconductor switch, and the positive terminal and the negative terminal of the full bridge circuit
- Full bridge type magnetic energy regenerative switch (hereinafter referred to simply as “MERS”) circuit consisting of a capacitor connected between terminals and the first AC terminal of the full bridge type MERS circuit
- a step-down transformer in which one end is connected to the AC power source, a primary side is connected to the AC power source, and one end on the secondary side is connected to the other end of the AC reactor, and control means.
- the second AC terminal is connected to the inductive load, and the control means uses the first reverse conducting semiconductor switch and the fourth reverse conducting semiconductor switch as the first pair, and the second reverse conducting.
- the second semiconductor switch and the third reverse conducting semiconductor switch are the second pair, and the self-extinguishing elements constituting the two reverse conducting semiconductor switches of the first pair are in the conducting state (hereinafter simply “reverse” When the conductive semiconductor switch is in the ON state, the self-extinguishing element that constitutes the two reverse conductive semiconductor switches in the second pair is blocked (hereinafter simply referred to as “reverse conductive semiconductor switch”). "Off state”) When the first pair is off, the on / off state of the reverse conducting semiconductor switch is controlled so that the second pair is on.
- control means outputs a signal for controlling the ON / OFF state of the reverse conducting semiconductor switch as a gate control signal, and turns on the reverse conducting semiconductor switch.
- the gate control signal phase should be controlled in synchronization with the AC power supply voltage phase.
- the AC voltage control device is characterized in that a voltage that compensates the reactance voltage of the inductive load is generated in the capacitor and the voltage applied to the inductive load is controlled.
- an AC voltage control device characterized in that the capacitor is a polar capacitor.
- the above object of the present invention is such that the resonance frequency (fres) determined by the value of the capacitance (C) of the capacitor and the inductance (L) of the inductive load is equal to or higher than the frequency (fac) of the AC power supply.
- This is also achieved by an AC voltage control device characterized in that the value of the capacitance (C) of the capacitor is set.
- the above object of the present invention is to set the difference between the phase change of the gate control signal and the voltage phase of the AC power supply as the phase angle of the gate control signal, and the phase change of the gate control signal is greater than the voltage phase of the AC power supply.
- a case that is ahead in time is expressed as a positive angle as “advance”, and a case where the phase change of the gate control signal is later than the voltage phase of the AC power supply is expressed as a “delay” and a negative angle.
- the phase angle range of the gate control signal is set from 0 degrees to plus 90 degrees, or from 0 degrees to minus 180 degrees. Achieved.
- the above object of the present invention is an AC voltage control device that is inserted in series between an AC power source and an inductive load and controls a load voltage applied to the inductive load.
- the AC voltage control device includes: A reverse conducting semiconductor switch leg connecting the negative electrode side of the first reverse conducting semiconductor switch and the negative electrode side of the second reverse conducting semiconductor switch, and the first crossing, which is the positive side of the first reverse conducting semiconductor switch.
- the on / off state of the body switch is controlled, and the control means provides a signal for controlling the on / off state of the reverse conducting semiconductor switch as a gate control signal, and the on / off state of the reverse conducting semiconductor switch. And the on-signal duration of the gate control signal When the duration of the Z-off signal matches, the reactance voltage of the inductive load is controlled by controlling the phase of the gate control signal in synchronization with the voltage phase of the AC power supply. This is achieved by an AC voltage control device that generates a voltage to compensate for the capacitor and controls the voltage applied to the inductive load.
- an AC voltage controller characterized in that the connection polarities of the first reverse conducting semiconductor switch and the second reverse conducting semiconductor switch are reversed.
- the above object of the present invention is such that the resonance frequency (fres) determined by the value of the capacitance (C) of the capacitor and the inductance (L) of the inductive load is equal to or higher than the frequency (fac) of the AC power supply.
- an AC voltage control device characterized in that the value of the capacitance (C) of the capacitor is set.
- the above object of the present invention is an AC voltage control device that is inserted in series between an AC power source and an inductive load and controls a load voltage applied to the inductive load.
- the AC voltage control device includes: A reverse conducting semiconductor switch leg having a first AC terminal at a point where the negative electrode side of the first reverse conducting semiconductor switch is connected to the positive electrode side of the second reverse conducting semiconductor switch, the first diode and the first diode
- the first capacitor clamp circuit with a capacitor connected in parallel and the second capacitor clamp circuit with a second diode and a second capacitor connected in parallel are connected to the positive electrode of the first diode.
- Capacitor circuit with the second AC terminal at the point where the negative electrode side of the second diode is connected to the positive electrode side of the first reverse conduction type semiconductor switch and the negative electrode side of the first diode The point where is connected is the positive terminal, and the second reverse First half current of vertical half-bridge MERS circuit and vertical half-bridge MERS circuit, where the negative electrode terminal is the point connecting the negative side of the normal semiconductor switch and the positive side of the second diode
- An AC reactor with one end connected to the terminal, a step-down transformer with the primary side connected to the AC power source and one end on the secondary side connected to the other end of the AC reactor, and control means.
- the second AC terminal is connected to an inductive load, and the control means turns off the second reverse conducting semiconductor switch when the first reverse conducting semiconductor switch is on, When the first reverse conducting semiconductor switch is off, the second reverse conducting semiconductor switch is turned on, and the first reverse conducting semiconductor switch and the second reverse conducting semiconductor switch are simultaneously turned on.
- the ON / OFF state of the reverse conducting semiconductor switch is controlled so that the reverse conducting semiconductor switch does not enter the gate state, and the control means outputs a signal for controlling the ON / OFF state of the reverse conducting semiconductor switch as a gate control signal.
- the phase of the gate control signal is By controlling in synchronization with the voltage phase, the voltage that compensates the inductive load reactance voltage is generated in the first capacitor and the second capacitor, and the voltage applied to the inductive load is controlled. This is achieved by the characteristic AC voltage control device.
- the above object of the present invention is an AC voltage control device that is inserted in series between an AC power source and an inductive load and controls a load voltage applied to the inductive load.
- the AC voltage control device includes: A first capacitor short circuit in which the positive side of the reverse conducting semiconductor is a first AC terminal, the first reverse conducting semiconductor switch and the first capacitor are connected in parallel, and the second reverse conducting semiconductor
- the second capacitor short circuit in which the positive side of the switch is the second AC terminal and the second reverse conducting semiconductor switch and the second capacitor are connected in parallel, is connected to the negative side of the first reverse conducting semiconductor switch.
- a two-capacitor horizontal half-bridge MERS circuit connected to the negative electrode side of the second reverse conducting semiconductor switch, an AC reactor having one end connected to the first AC terminal of the two-capacitor horizontal half-bridge MERS circuit, Exchange Primary AC power source is connected to, and, together comprising a secondary step down transformer having one end connected to the other end of the AC Riaku torr, and a control unit, a
- the second AC terminal is connected to an inductive load, and the control means turns off the second reverse conducting semiconductor switch when the first reverse conducting semiconductor switch is on, When the first reverse conducting semiconductor switch is off, the second reverse conducting semiconductor switch is turned on, and the first reverse conducting semiconductor switch and the second reverse conducting semiconductor switch are simultaneously turned on. Control the ON / OFF state of the reverse conducting semiconductor switch so that the
- control means provides a signal for controlling the ON / OFF state of the reverse conducting semiconductor switch as a gate control signal, and turns on the reverse conducting semiconductor switch.
- gate control signal phase is controlled in synchronism with the voltage phase of the AC power supply.
- the object of the present invention is that the self-extinguishing element constituting the reverse conducting semiconductor switch is a field effect transistor or a semiconductor element having an equivalent structure, and the control means constitutes the reverse conducting semiconductor switch.
- This can also be achieved by an AC voltage control device that controls the reverse conducting semiconductor switch to be in an on state when the diode to be conducted becomes a conducting state in the forward direction.
- each of the first capacitor and the second capacitor is a polarized capacitor.
- an AC voltage control device characterized in that the connection polarities of the first reverse conducting semiconductor switch and the second reverse conducting semiconductor switch are reversed.
- the above object of the present invention is to reverse the connection polarities of the first reverse conducting semiconductor switch and the second reverse conducting semiconductor switch, respectively, and to further change the connection polarities of the first capacitor and the second condenser, respectively.
- This can also be achieved by an AC voltage controller characterized by the reverse.
- the object of the present invention is to provide a first resonance frequency (fres 1) determined by the capacitance (C 1) of the first capacitor and the inductance (L) of the inductive load, and the second capacitor.
- the second resonant frequency (fres 2) determined by the value of the capacitance (C 2) and the inductance (L) of the inductive load is
- the AC voltage control device is characterized in that the capacitances (C l, C 2) of the first and second capacitors are set so as to be equal to or higher than the frequency (fac) of the AC power source, respectively. Achieved.
- an AC voltage control device characterized in that the step-down transformer is removed and an AC power source is directly connected to the other end of the AC reactor.
- an AC voltage control device further comprising a power factor compensation capacitor connected in parallel between terminals of the AC power supply.
- the above object of the present invention is to set the difference between the phase change of the gate control signal and the voltage phase of the AC power supply as the phase angle of the gate control signal, and the phase change of the gate control signal is greater than the voltage phase of the AC power supply.
- a case that is ahead in time is expressed as a positive angle as “advance”, and a case where the phase change of the gate control signal is later than the voltage phase of the AC power supply is expressed as a “delay” and a negative angle.
- an AC voltage control device characterized in that the range of the phase angle of the gate control signal is set from 0 degree to 90 degrees or from 0 degrees to minus 90 degrees. Is done.
- the voltage supplied to the load can be controlled without significantly advancing the phase of the current supplied to the load.
- the voltage burden between the reverse conducting semiconductor switch and the capacitor of the MERS circuit can be reduced, leading to a reduction in the size of the AC voltage control device according to the present invention.
- harmonics contained in the current waveform can be reduced.
- FIG. 1 is a circuit block diagram showing the configuration of the first embodiment according to the present invention.
- FIG. 2 is a circuit block diagram showing the configuration of the second embodiment according to the present invention.
- FIG. 3 is a circuit block diagram showing a configuration in which the positive electrodes of two reverse conducting semiconductor switches are shared in the second embodiment according to the present invention.
- FIG. 4 is a circuit block diagram showing the configuration of the third embodiment according to the present invention.
- FIG. 5 is a circuit block diagram showing the configuration of the fourth embodiment according to the present invention.
- FIG. 6 is a circuit block diagram showing a configuration in which the positive electrodes of two reverse conducting semiconductor switches are shared in the fourth embodiment according to the present invention.
- FIG. 7 is an excerpt of a circuit block diagram showing a configuration in which the step-down transformer is removed and the AC power source and the AC reactor are directly connected in the configuration of the AC voltage control apparatus according to the present invention.
- FIG. 8 is an excerpt of a circuit block diagram showing a configuration in which a power factor compensation capacitor is connected in the configuration of the AC voltage control apparatus according to the present invention.
- FIG. 9 is an excerpt of a circuit block diagram showing a configuration using a power switch for complete current interruption in the second and fourth embodiments of the present invention. It is.
- FIG. 10 is a circuit block diagram showing a configuration in which a power factor compensation capacitor is connected and a power switch is used for complete current interruption in the second and fourth embodiments according to the present invention. Excerpt.
- FIG. 11 is a diagram showing the relationship between the voltage phase of the AC power supply and the phase angle ⁇ of the gate control signal.
- FIG. 12 is a diagram showing the relationship between the phase angle ⁇ of the gate control signal and the load voltage.
- FIG. 13 is a diagram showing a computer simulation result of the configuration of the first embodiment according to the present invention.
- FIG. 14 is a diagram showing a computer simulation result of the configuration of the sixth embodiment according to the present invention.
- FIG. 15 is a diagram showing a computer simulation result of the configuration of the seventh embodiment according to the present invention.
- FIG. 16 is a diagram showing a computer simulation result when there is no configuration of the seventh embodiment according to the present invention. Explanation of symbols
- a self-extinguishing element refers to an electronic component capable of controlling the forward conduction blocking state of the element by applying a control signal to the gate of the element.
- the signal that controls the ON / OFF state of the reverse conducting semiconductor switch is the gate control signal, and the ON / OFF state of the reverse conducting semiconductor switch and the ON signal duration of the gate control signal Z OFF signal duration Shall match.
- the reverse conducting semiconductor switch remains on and reverse conducting
- the reverse conduction semiconductor switch continues to be turned off.
- Fig. 11 shows the definition of the phase angle of the gate control signal.
- the change in the phase of the gate control signal is the difference between the voltage phase of the AC power supply 3 and the phase angle ⁇ of the gate control signal, and the change in the phase of the gate control signal is The time that precedes the voltage phase is expressed as “advance” as a positive angle, and the case that the phase change of the gate control signal is later than the voltage phase of the AC power supply 3 is expressed as “lag”. Expressed with a negative angle.
- FIG. 12 shows the relationship between the phase angle ⁇ of the gate control signal and the load voltage V 1 ⁇ a d.
- the range of the phase angle of the gate control signal is “Region 1” for the range from 0 ° to 90 °, “Region 2” for the range from 90 ° to 180 °, — 1 8
- the range from 0 ° to —90 ° is called “Region 3”
- the range from —90 ° to 0 ° is called “Region 4”
- the 0 ° point is called “0 ° Point”. Is used.
- FIG. 1 is a circuit block diagram showing a configuration of an AC voltage control apparatus according to a first embodiment of the present invention.
- the AC voltage control apparatus according to the first embodiment of the present invention is inserted in series between the AC power supply 3 and the inductive load 5 and supplied to the inductive load 5 (load voltage). It is the alternating voltage control apparatus which controls.
- the AC voltage control device in Fig. 1 connects a self-extinguishing element and a diode, and connects the positive side of the self-extinguishing element and the negative side of the diode, and the negative side of the self-extinguishing element and the positive side of the diode.
- Connected side hereinafter simply connected to "reverse parallel") Circuit
- an equivalent semiconductor element is a reverse conduction type semiconductor switch.
- reverse conducting semiconductor switch and the negative side of the self-extinguishing element constituting the first reverse conducting semiconductor switch SW 1 (hereinafter simply referred to as “reverse conducting semiconductor switch negative electrode”). And the positive electrode side of the self-extinguishing element constituting the second reverse conducting semiconductor switch SW2 (hereinafter simply referred to as “the positive electrode side of the reverse conducting semiconductor switch”).
- the first reverse conducting semiconductor switch leg that is the first AC terminal AC 1 is connected to the negative side of the third reverse conducting semiconductor switch SW 3 and the positive side of the fourth reverse conducting semiconductor switch SW 4.
- a full bridge circuit configured as a negative terminal DCN by connecting the negative side of the type 2 semiconductor switch SW 2 and the negative side of the fourth reverse conducting semiconductor switch SW4, and between the positive terminal DCP and the negative terminal D CN of the full bridge circuit
- ME RS full-bridge magnetic energy regenerative switch
- An AC reactor L a c having one end connected to the first AC terminal A C 1 of the full-bridge type ME R S circuit 10;
- a step-down transformer 9 having a primary side connected to the AC power source 3 and one end of the secondary side connected to the other end of the AC reactor L ac;
- the second AC terminal AC 2 is connected to the inductive load 5,
- the control means 4 includes the first reverse conducting semiconductor switch SW1 and the fourth reverse conducting semiconductor switch SW4 as the first pair, and the second reverse conducting semiconductor switch SW2 and the third reverse conducting semiconductor switch SW4.
- Semiconductor switch SW 3 is the second pair, When the self-extinguishing element constituting the two reverse conducting semiconductor switches of the first pair is in the conducting state (hereinafter simply referred to as “the reverse conducting semiconductor switch is turned on”), the second pair When the first pair is in the off state, the self-extinguishing element constituting the two reverse conducting semiconductor switches is set to the blocking state (hereinafter simply referred to as “the reverse conducting semiconductor switch is turned off”). Controls the on / off state of the reverse conducting semiconductor switch so that the second pair is on,
- control means 4 provides a signal for controlling the on / off state of the reverse conducting semiconductor switch as a gate control signal, the on / off state of the reverse conducting semiconductor switch, and the continuation of the on signal of the gate control signal.
- the voltage that compensates the reactance voltage of the inductive load 5 is controlled by controlling the phase of the gate control signal in synchronization with the voltage phase of the AC power supply 3. It is characterized in that the voltage applied to the inductive load 5 is controlled.
- FIG. 13 is a circuit block diagram shown in FIG. 1, and shows the results of computer simulation when the following circuit constants are used.
- FIG. 13 shows the current I in supplied from the AC power source 3, the current flowing through the inductive load 5 (load current) I load, the voltage V ac of the AC power source 3, and the voltage supplied to the inductive load (load Voltage) V 1 oad, AC power supply 3 voltage V ac and second reverse conduction type semiconductor switch SW2 gate control signal G 2 expanded, Capacitor C voltage across V C, AC power supply 3 Shows the waveform of the power factor PF ac (power factor PF ac is displayed at 100 0 times) measured by the AC power source 3 ing.
- a step-down transformer 9 is inserted between the AC power source 3 and the AC voltage control device of the first embodiment according to the present invention, and the voltage of the AC power source 3 is changed from 20 0 V rms to 16 0 V rms. V ac is reduced by 20%.
- the AC reactor L a c is selected to be 0.6 mH.
- the phase angle ⁇ of the gate control signal is set to “advance”, the load voltage V I o a d is boosted from a voltage that is 20% lower than the voltage V ac of the AC power supply 3.
- the control means 4 sets the phase angle ⁇ of the gate control signal to — 45 degrees (delayed), and then the phase angle of the gate control signal to 30 degrees (advance). As shown, the load voltage VI oad is boosted.
- Capacitance (C) of capacitor C is only absorbed and discharged (capacitor is discharged) by absorbing magnetic energy of inductive load 5 by resonance with inductance (L) of inductive load 5.
- Very small capacity PC leakage 59392 In other words, the capacity of the AC power source 3 of the inductive load 5 is sufficient for absorbing and releasing the half-cycle magnetic energy.
- the capacitor is completely different from the large-capacity smoothing capacitor for stably supplying the DC voltage used in the conventional voltage-type PWM inverter circuit.
- Capacitor C absorbs magnetic energy (1/2 (L (I load) "2)) as electrostatic energy (1/2 (C (Vc)-2)) every half cycle of AC power supply 3.
- the voltage V c across the capacitor C is characterized by going from peak to almost zero [V] in synchronization with every half cycle of the AC power supply 3.
- the resonance frequency (fres) determined by the capacitance (C) of the capacitor C and the inductance (L) of the inductive load 3 is set to be equal to or higher than the frequency (fac) of the AC power supply 3, so that
- the self-extinguishing element constituting the conductive semiconductor switch has substantially zero voltage and zero current, and when turned off, the self-extinguishing element constituting the reverse conducting semiconductor switch has substantially zero voltage.
- the capacitor C has a voltage range in a voltage range that compensates the reactance voltage of the inductive load 5, the shared voltage of the capacitor C can be lowered. From Fig.13, the voltage on the secondary side of the step-down transformer 9 is Although 1 60 V rms (maximum voltage is 2 2 6 V), it can be confirmed that the voltage V c across capacitor C is 1 50 V at maximum.
- the range of the phase angle of the gate control signal ranges from 0 degrees to 90 degrees (area 1 in Fig. 12) and from 0 degrees to 1 180 degrees (area 3 in Fig. 12). By using the range 4), the distortion generated in the voltage waveform and current waveform applied to the inductive load 5 can be reduced.
- FIG. 2 is a circuit block diagram showing the configuration of the AC voltage control apparatus according to the second embodiment of the present invention.
- FIG. 2 shows an AC voltage control device that is inserted in series between the AC power source 3 and the inductive load 5 and controls the voltage (load voltage) supplied to the inductive load 5.
- the AC voltage control device of FIG. 2 includes a reverse conducting semiconductor switch leg in which the negative side of the first reverse conducting semiconductor switch SW 1 and the negative side of the second reverse conducting semiconductor switch SW 2 are connected to each other. Connected between the first AC terminal AC 1 on the positive side of the reverse conducting semiconductor switch SW 1 and the second AC terminal AC 2 on the positive side of the second reverse conducting semiconductor switch SW 2 1 capacitor horizontal half bridge ME RS circuit 2 1 composed of capacitor C,
- Capacitor horizontal half bridge MERS circuit 2 1st AC terminal AC reactor L ac with one end connected to AC 1 and
- a step-down transformer 9 having a primary side connected to the AC power source 3 and one end of the secondary side connected to the other end of the AC reactor L a c;
- the second AC terminal A C 2 is connected to the inductive load 5,
- the control means 4 turns off the second reverse conducting semiconductor switch SW 2 and the first reverse conducting semiconductor switch SW 1 In the off state, the second reverse conducting semiconductor switch SW 2 is turned on, and the first reverse conducting semiconductor switch SW 1 and the second reverse conducting semiconductor switch SW 2 are simultaneously turned off.
- the on / off state of the reverse conducting semiconductor switch is controlled so that the
- control means 4 provides a signal for controlling the ON / OFF state of the reverse conducting semiconductor switch as the gate control signal, the ON / Z off state of the reverse conducting semiconductor switch, and the on / off state of the gate control signal.
- Signal duration When the duration of the Z-off signal matches, the phase of the gate control signal is controlled in synchronism with the voltage phase of the AC power supply 3, thereby compensating the reactance voltage of the inductive load 5. Is generated in the capacitor C and the voltage applied to the inductive load 5 is controlled.
- FIG. 3 is a circuit block diagram showing a configuration in which the positive electrode sides of two reverse conducting semiconductor switches are shared in the second embodiment of the present invention.
- connection polarity of each of the first reverse conducting semiconductor switch SW 1 and the second reverse conducting semiconductor switch SW 2 is determined. This is a mode in which the positive electrode sides are connected to each other. Same as the AC voltage control device of the second embodiment according to the present invention 09 059392 Function ⁇ Action ⁇ Effective.
- the same configuration can be used when using a reverse-conducting semiconductor switch such as a P-channel transistor M0 S F E T, or a circuit in which a transistor and a diode are connected in antiparallel.
- a reverse-conducting semiconductor switch such as a P-channel transistor M0 S F E T, or a circuit in which a transistor and a diode are connected in antiparallel.
- Capacitor C has a 1-capacitor horizontal half-bridge MERS circuit 2 1 because the positional relationship of the potential between the first AC terminal AC 1 and the second AC terminal AC 2 changes each time the voltage phase of AC power supply 3 changes. Use a nonpolar capacitor.
- the resonance frequency (fres) determined by the capacitance (C) of the capacitor C and the inductance (L) of the inductive load 5 is set to be equal to or higher than the frequency (fac) of the AC power supply 3, so that When the self-extinguishing element constituting the conduction type semiconductor switch is turned on Z-off, the self-extinguishing element constituting the reverse conduction type semiconductor switch is to perform a soft switching operation of substantially zero voltage. Can do.
- the switching loss is halved compared to the AC voltage control device of the first embodiment according to the present invention. Furthermore, the configuration of the AC voltage controller according to the second embodiment of the present invention can be simplified.
- the AC voltage control apparatus is configured such that the reverse conduction type semiconductor switch is turned on / off with the electric charge remaining in the capacitor C.
- capacitor C is short-circuited. Therefore, the range of the phase angle a; of the gate control signal is from 0 degrees to 90 degrees (area 1 in Fig. 12) and from 0 degrees to 90 degrees (area 4 in Fig. 12). It is possible to cope with a short circuit of the capacitor C.
- the range of the phase angle ⁇ is set to the above-described range, there is an effect that the energization loss of the AC voltage control device according to the second embodiment of the present invention is reduced.
- the capacitor C is connected in series between the AC power source 3 and the inductive load 5, so that the load current I 1 oad is completely reduced. It cannot be blocked. If it is necessary to completely cut off the load current I 1 oad, it can be handled by installing a power switch PSW between the AC power source 3 and the AC voltage control device of the second embodiment according to the present invention. .
- FIG. 9 (A) and FIG. 9 (B) show a mode in which the power switch P SW described above is installed. (The mode of Fig. 9 (B) will be described later.)
- FIG. 4 is a circuit block diagram showing the configuration of the AC voltage control apparatus according to the third embodiment of the present invention.
- FIG. 4 shows an AC voltage control device that is inserted in series between the AC power source 3 and the inductive load 5 and controls the voltage (load voltage) supplied to the inductive load 5.
- the AC voltage control device in FIG. 4 is connected to the first AC terminal AC 1 by connecting the negative side of the first reverse conducting semiconductor switch SW 1 to the positive side of the second reverse conducting semiconductor switch SW 2.
- a capacitor circuit in which the second capacitor clamp circuit connected in parallel is connected to the positive side of the first diode D 1 and the negative side of the second diode D 2 as the second AC terminal AC 2 is used.
- the vertical half-bridge ME RS circuit 30 configured as the negative terminal DCN is the point where the positive side of the diode D2 is connected.
- a step-down transformer 9 having a primary side connected to the AC power source 3 and one end of the secondary side connected to the other end of the AC reactor L ac;
- the second AC terminal A C 2 is connected to the inductive load 5,
- the control means 4 turns off the second reverse conducting semiconductor switch SW 2 and the first reverse conducting semiconductor switch SW 1 In the off state, the second reverse conducting semiconductor switch SW 2 is turned on, and the first reverse conducting semiconductor switch SW 1 and the second reverse conducting semiconductor switch SW 2 are turned on simultaneously.
- the on / off state of the reverse conducting semiconductor switch is controlled so that the
- control means 4 provides a signal for controlling the ON / OFF state of the reverse conducting semiconductor switch as a gate control signal, the on / off state of the reverse conducting semiconductor switch, and the continuation of the ON signal of the gate control signal.
- the duration of the time-off signal matches, the voltage that compensates the reactance voltage of the inductive load 5 is controlled by controlling the phase of the gate control signal in synchronization with the voltage phase of the AC power supply 3. 1 and second capacitor C 2 It is characterized by controlling the voltage applied to the inductive load 5.
- the basic operation and characteristics of the AC voltage control device according to the third embodiment of the present invention are the same as those of the AC voltage control device according to the first embodiment of the present invention.
- items specific to the AC voltage control apparatus according to the third embodiment of the present invention will be described.
- the capacitance (C 1) of the first capacitor C 1 and the capacitance (C 2) of the second capacitor C 2 are the same as the inductive load 5 due to resonance with the inductance (L) of the inductive load 5.
- a very small capacity is sufficient to absorb the magnetic energy (capacitor is charged) and discharge (capacitor is discharged).
- the first capacitor C 1 and the second capacitor C 2 are a large-capacity smoothing capacitor that stably supplies the DC voltage used in the conventional voltage-type P WM The purpose is completely different.
- first capacitor C 1 and the second capacitor C 2 alternately absorb magnetic energy (1 Z 2 (L (I 1 oad) "2)) in synchronization with each half cycle of the AC power supply 3. It is absorbed and released as electric energy (1 2 (C 1 (V c 1) ⁇ 2)), (1/2 (C 2 (V c 2) 2))
- the voltage V across the first capacitor C 1 Cl and the voltage V c 2 across the second capacitor C 2 are characterized by alternating from the peak to approximately zero [V] in synchronization with each half cycle of the AC power supply 3.
- the capacitance (C 1) of the first capacitor C 1 the first resonance frequency (fres 1) determined by the value of the inductance (L) of the inductive load 5, and the static of the second capacitor C 2
- the second resonance frequency (ires 2) determined by the capacitance (C 2) and the inductance (L) value of the inductive load 5 is close to the frequency (fac) of the AC power source 3, respectively.
- the generation of harmonics of voltage and current by the AC voltage control device of the third embodiment according to the present invention can be reduced.
- the second resonant frequency (fres 2) determined by the capacitance (C 2) and the inductance (L) value of the inductive load 5 should be equal to or higher than the frequency (fac) of the AC power supply 3, respectively.
- the AC voltage control device since the first capacitor C 1 and the second capacitor C 2 have a voltage range that compensates for the reactance voltage of the inductive load 5, the shared voltage of each capacitor can be lowered. it can. Since the first capacitor C 1 and the second capacitor C 2 are alternately charged and discharged in synchronization with each half cycle of the AC power supply 3, the AC voltage control device according to the first embodiment of the present invention is used. Compared with, current duty per capacitor is halved.
- the present invention Compared with the AC voltage control apparatus of the first embodiment, the switching loss is halved. Furthermore, the configuration of the AC voltage controller according to the third embodiment of the present invention can be simplified.
- the range of the phase angle ⁇ of the gate control signal is from 0 degrees to 90 degrees (range 1 in FIG. 12), as in the first embodiment according to the present invention, and from 0 degrees. It can be up to 1800 degrees (range of area 3 and area 4 in Fig. 12). However, if the phase angle ⁇ of the gate control signal is –90 degrees to 1180 degrees (range 4 in Fig. 12), the first capacitor C 1 and the second capacitor C 2 Charges remain in each of them, and the shared voltage of each capacitor increases.
- the range of the phase angle Q! Of the gate control signal is
- the shared voltage of each capacitor can be lowered. Further, distortion generated in the voltage waveform and the current waveform applied to the inductive load 5 can be reduced.
- FIG. 5 is a circuit block diagram showing the configuration of the AC voltage control apparatus according to the fourth embodiment of the present invention.
- FIG. 5 shows an AC voltage control device that is inserted in series between the AC power source 3 and the inductive load 5 and controls the voltage (load voltage) supplied to the inductive load 5.
- the positive side of the first reverse conducting semiconductor SW 1 is the first AC terminal AC 1
- the first reverse conducting semiconductor switch SW 1 and the first capacitor C 1 are connected.
- the first capacitor short-circuit connected in parallel and the positive side of the second reverse conducting semiconductor switch SW 2 is the second AC terminal AC 2
- the second reverse conducting semiconductor switch SW 2 and the second capacitor C 2 Connect the second capacitor short circuit connected in parallel to the negative side of the first reverse conducting semiconductor switch SW 1 and the negative side of the second reverse conducting semiconductor switch SW 2 2 capacitor horizontal half bridge ME RS Circuit 1 1 and
- a step-down transformer 9 having a primary side connected to the AC power source 3 and one end of the secondary side connected to the other end of the AC reactor L ac;
- the second AC terminal A C 2 is connected to the inductive load 5,
- the control means 4 turns off the second reverse conducting semiconductor switch SW2, and the first reverse conducting semiconductor switch SW1 is In the off state, the second reverse conducting semiconductor switch SW 2 is turned on, and the first reverse conducting semiconductor switch SW 1 and the second reverse conducting semiconductor switch SW 2 are turned on simultaneously.
- the ON / OFF state of the reverse conducting semiconductor switch is controlled so that the
- control means 4 provides a signal for controlling the ON / OFF state of the reverse conducting semiconductor switch as the gate control signal, the ON / Z off state of the reverse conducting semiconductor switch, and the on / off state of the gate control signal.
- Signal duration When the duration of the Z-off signal matches, the phase of the gate control signal is controlled in synchronism with the voltage phase of the AC power supply 3, thereby compensating the reactance voltage of the inductive load 5. Is generated in the first capacitor C 1 and the second capacitor C 2, and the voltage applied to the inductive load 5 is controlled.
- FIG. 6 is a circuit block diagram showing a configuration in which the positive electrode sides of two reverse conducting semiconductor switches are shared in the fourth embodiment according to the present invention.
- connection polarity of each of the first reverse conducting semiconductor switch SW 1 and the second reverse conducting semiconductor switch SW 2 is determined. This is a mode in which the positive electrode sides are connected to each other. It has the same functions, operations and effects as the AC voltage control apparatus of the fourth embodiment according to the present invention.
- the AC voltage control device is a reverse conducting semiconductor switch in a state where electric charge remains in at least one of the first capacitor C1 and the second capacitor C2. Switching the on / off state of the capacitor shorts out the remaining charge. Therefore, the range of the phase angle ⁇ of the gate control signal is 0 degrees to 90 degrees (range 1 in Fig. 12) and 0 to –90 degrees (range 4 in Fig. 12). It is possible to respond by controlling between When the range of the phase angle is set as described above, there is an effect that the conduction loss of the AC voltage control device according to the fourth embodiment of the present invention is reduced.
- FIG. 9 (A) and FIG. 9 (B) show a mode in which the above-described power switch PSW is installed. (The mode of Fig.
- control means 4 is a synchronous rectification system that reduces conduction loss by controlling the reverse conducting semiconductor switch to be on when the diodes that make up the reverse conducting semiconductor switch are conducting in the forward direction. You can also.
- FIG. 7 (B) is a circuit block diagram showing a part of the configuration of the AC voltage control apparatus of the fifth embodiment according to the present invention.
- FIG. 7 (B) shows the voltage of the AC power source 3 of the step-down transformer 9 by increasing the AC inductance of the AC voltage control device according to the present invention and increasing the ac inductance.
- the feature is that the AC power supply 3 is directly connected to the other end of the AC reactor Lac.
- the shared voltage of the AC reactor L a c is characterized by a voltage width in the range of the voltage that compensates the reactance voltage of the inductive load 5.
- AC reactor L ac needs to have a large inductance capacity.
- the AC voltage control device according to the present invention has a large power capacity and the AC reactor L ac is designed according to the power factor of the inductive load 5, the waveform of the load current I load is made the fundamental wave. It can be a big advantage.
- FIG. 8 (A) and FIG. 8 (B) are circuit block diagrams showing a part of the configuration of the AC voltage control apparatus of the sixth embodiment according to the present invention.
- FIGS. 8 (A) and 8 (B) further include a power factor compensation capacitor C comm connected in parallel between the terminals of the AC power supply 3, and the current voltage control device according to the present invention.
- the characteristic is that the power factor is approximately 1 in the entire voltage control range.
- FIG. 14 (A) shows a computer simulation when the circuit constants shown in FIG. 13 are used in the AC voltage controller according to the first embodiment of the present invention. Results are shown.
- FIG. 14 (B) shows an AC voltage control apparatus according to the first embodiment of the present invention, using the circuit constants shown in FIG. 13 and the capacitance of the power factor compensation capacitor C com as 1 Shows the results of computer simulation with 20 micro F.
- Figures 14 (A) and 14 (B) show the apparent power VA ac measured with AC power supply 3, active power W ac measured with AC power supply 3, and power factor measured with AC power supply 3, respectively. This shows the waveform of PF ac (power factor PF ac is displayed in 100-fold magnification).
- the power factor compensation capacitor The power factor must be approximately 1 even if the phase angle ⁇ of the gate control signal of the AC voltage controller connected to C comm is changed from -4 5 degrees (delay) to 30 degrees (advance). Can be confirmed.
- FIG. 15 is a diagram showing a computer simulation result of the configuration of the seventh embodiment according to the present invention.
- FIG. 16 is a diagram showing a computer simulation result when the AC power source 3 and the inductive load 5 are directly connected. In both cases, it is assumed that the load voltage V 1 o ad drops when the impedance of the AC power source 3 is high and the load current I 1 o a d is large. More specifically, FIG. 15 is a circuit block diagram shown in FIG. 1, and shows the results of computer simulation when the following circuit constants are used.
- FIG. 15 shows the current flowing through the inductive load 5 (load current) I 1 oad, the voltage V c across the capacitor C, the voltage V in supplied to the full bridge type ME RS circuit 10 and the full bridge type MERS Effective voltage V inillerrms supplied to circuit 10 and voltage supplied to inductive load 5 (load voltage) V 1 oad and effective voltage supplied to inductive load 5 V 1 oad—rms, apparent power measured at AC power supply 3 VA ac, gate control signal G 1 of first reverse conducting semiconductor switch SW 1, second The waveform of the gate control signal G2 of the reverse conduction type semiconductor switch SW2 is shown.
- Fig. 16 shows the current flowing through the inductive load 5 (load current) I load, the voltage V ac of the AC voltage 3, the effective voltage V ac-rms of the AC power source 3, and the inductive load 5
- the waveform of the apparent power VA ac measured with the AC voltage 3 (load voltage) V 1 oad, the effective voltage V 1 oad—rms supplied to the inductive load 5 and the AC power supply 3 is shown.
- a step-down transformer 9 is inserted between the AC power source 3 and the AC voltage control device of the seventh embodiment according to the present invention, and the AC voltage is changed from 110 V rms to 88 V rms.
- the voltage V ac of power supply 3 is reduced by 20%.
- the AC reactor L a c is 6.2 mH.
- the inductive load 5 is similar to two inductive loads connected in parallel, and consists of a first inductive load and a second inductive load.
- the first inductive load is 20 mH, 20 ohms
- the second inductive load is 30 mH, 5 ohms.
- the first inductive load is always connected from time 0, but the second inductive load is connected only from time 0.1 seconds to time 0.2 seconds.
- the control means 4 always sets the phase angle of the gain control signal to 0 degree (the 0 degree point in Fig. 12). That is, the gate signal control signal G 1 of the reverse conducting semiconductor switch SW 1 and the gate of the reverse conducting semiconductor switch SW 2 are synchronized with the time when the voltage V ac of the AC power supply 3 becomes substantially zero voltage. It only changes the phase of the signal control signal G2.
- the basic operation and characteristics of the AC voltage control device of the seventh embodiment according to the present invention are the same as those of the AC voltage control device of the first embodiment according to the present invention. Items specific to the AC voltage control apparatus of the seventh embodiment will be described.
- the phase angle ⁇ of the gate control signal is always set to 0 degree (the 0 degree point in Fig. 12). That is, the gate signal control signal G 1 of the reverse conducting semiconductor switch SW 1 and the gate signal of the reverse conducting semiconductor switch SW 2 are synchronized with the time when the voltage V ac of the AC power supply 3 becomes substantially zero voltage. Only the phase of control signal G2 is switched. In other AC voltage control devices according to the embodiments of the present invention, the phase angle ⁇ of the gate control signal is positively controlled. In the AC voltage control apparatus of the seventh embodiment according to the present invention, the phase angle ⁇ of the gate control signal is always 0 degree (the 0 degree point in FIG. 12), so that the inductive load 5 The voltage (load voltage) VI oad supplied to can be kept constant. The method of always setting the phase angle ⁇ of the gate control signal to 0 degree (the 0 degree point in FIG. 12) also works effectively in other AC power supply control apparatuses according to the embodiments of the present invention.
- discharge lamps As the inductive load 5 connected to the AC voltage control device described above, one or a plurality of discharge lamps having an inductive load (hereinafter simply referred to as “discharge lamps”). By connecting 009 to 92 and changing the load voltage V 1 oad, it is possible to provide a discharge lamp dimming system characterized by dimming the brightness of the discharge lamp according to the purpose.
- the circuit constants shown in Fig. 13 are values assuming a low power factor fluorescent lamp with a power factor of 0.7 and a reactor ballast mercury lamp with an AC input of 20 V rms. It can be confirmed that the AC voltage control device according to the present invention works effectively.
- induction motors As the inductive load 5 connected to the AC voltage control device described above, one or a plurality of induction motors (hereinafter simply referred to as “induction motors”) are connected, and the control means 4 is a steady operation of the induction motor.
- the phase angle ⁇ of the gate control signal that does not generate voltage is set in the capacitor C (or the first capacitor C 1 and the second capacitor C 2), the load voltage V load is lowered from the rating of the induction motor.
- the iron loss in the induction motor is reduced, and the control means 4 is connected to the capacitor C (or the first capacitor C 1 and the second capacitor C 2) when starting the induction motor.
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Abstract
Description
Claims
Priority Applications (3)
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CN2009801175481A CN102047546A (zh) | 2008-05-15 | 2009-05-15 | 交流电压控制装置 |
JP2010512043A JP4701332B2 (ja) | 2008-05-15 | 2009-05-15 | 交流電圧制御装置 |
US12/992,752 US8384333B2 (en) | 2008-05-15 | 2009-05-15 | Alternating voltage control apparatus |
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JPPCT/JP2008/059397 | 2008-05-15 | ||
PCT/JP2008/059397 WO2009139077A1 (ja) | 2008-05-15 | 2008-05-15 | 交流電圧制御装置 |
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PCT/JP2008/059397 WO2009139077A1 (ja) | 2008-05-15 | 2008-05-15 | 交流電圧制御装置 |
PCT/JP2009/059392 WO2009139505A1 (ja) | 2008-05-15 | 2009-05-15 | 交流電圧制御装置 |
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JP2012085475A (ja) * | 2010-10-13 | 2012-04-26 | Merstech Inc | 誘導電動機制御装置及び誘導電動機制御方法 |
JP2013009462A (ja) * | 2011-06-22 | 2013-01-10 | Easymore Industrial Co Ltd | 位相制御型交流電圧安定化回路 |
TWI490093B (zh) * | 2010-02-10 | 2015-07-01 | Maeda Metal Ind | electrical tools |
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JP6260329B2 (ja) * | 2014-02-17 | 2018-01-17 | オムロン株式会社 | 電流測定装置、その制御方法、制御プログラム、並びに記録媒体、および電力測定装置 |
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DE102017117888A1 (de) * | 2017-08-07 | 2019-02-07 | Infineon Technologies Austria Ag | Elektronische Schaltung mit einer Halbbrückenschaltung und einem Spannungsklemmelement |
US10890932B2 (en) | 2018-08-20 | 2021-01-12 | Eaton Intelligent Power Limited | Electrical network configured to magnetically couple to a winding and to control magnetic saturation in a magnetic core |
CN109343647B (zh) * | 2018-09-18 | 2021-05-25 | 江苏大学 | 一种动态无线充电最大效率跟踪系统及方法 |
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DE102019127798A1 (de) * | 2019-10-15 | 2021-04-15 | Infineon Technologies Ag | Elektronische schaltung mit zwei spannungsversorgungsschaltungen |
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CN116826761B (zh) * | 2023-08-28 | 2023-11-28 | 武汉中楚柏泰智能科技有限公司 | 电磁式电能质量统一控制器 |
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US8384333B2 (en) | 2013-02-26 |
WO2009139077A1 (ja) | 2009-11-19 |
CN102047546A (zh) | 2011-05-04 |
US20110121774A1 (en) | 2011-05-26 |
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