WO2013094189A1 - インパルス電圧発生装置 - Google Patents
インパルス電圧発生装置 Download PDFInfo
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- WO2013094189A1 WO2013094189A1 PCT/JP2012/008099 JP2012008099W WO2013094189A1 WO 2013094189 A1 WO2013094189 A1 WO 2013094189A1 JP 2012008099 W JP2012008099 W JP 2012008099W WO 2013094189 A1 WO2013094189 A1 WO 2013094189A1
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- Prior art keywords
- voltage
- impulse
- high voltage
- value
- voltage generator
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/64—Generators producing trains of pulses, i.e. finite sequences of pulses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/01—Details
- H03K3/013—Modifications of generator to prevent operation by noise or interference
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
Definitions
- the present invention relates to an impulse voltage generator.
- the impulse voltage generator is applied to, for example, an inverter drive system including a motor, an inverter, and a cable.
- the inverter converts a DC voltage into a pulse voltage by a switching operation, and supplies the pulse voltage to the motor via a cable.
- the motor is driven by this pulse voltage.
- the impulse voltage generator includes a high voltage generator, a capacitive element, a first output terminal, a second output terminal, a first electrode, and a second electrode.
- a high voltage generator is provided between the first node and the second node.
- a capacitive element is provided in parallel with the high voltage generator between the first node and the second node.
- the connection portion is provided between the first output terminal and the second output terminal as a load for supplying an impulse voltage.
- a first electrode and a second electrode are provided between the first node and the first output terminal.
- the first electrode and the second electrode are, for example, spherical metal electrodes (such as tungsten), and the first electrode and the second electrode are provided apart from each other.
- the high voltage generator generates a high voltage, and charges are accumulated in the capacitive element due to the high voltage from the high voltage generator. At this time, when the voltage between the first electrode and the second electrode reaches the spark discharge start voltage, a spark discharge is generated, and an impulse voltage is generated between the first output terminal and the second output terminal. .
- the peak value of the impulse voltage is determined by the spark discharge in the atmosphere and is smaller than the high voltage supplied by the high voltage generator.
- an impulse voltage is generated by spark discharge. For this reason, parameters such as the voltage value of the impulse voltage, the rise time, the fall time, and the impulse repetition frequency are often not constant.
- Non-Patent Document 1 describes a circuit that generates a high voltage pulse using a semiconductor switch. However, it is not a configuration for realizing a test in which a period in which an impulse voltage is repeatedly generated and a period in which the impulse voltage is not generated are alternately performed.
- the problem to be solved by the present invention is to realize a test in which a period in which a stable impulse voltage is repeatedly generated and a period in which the impulse voltage is not generated are alternately performed.
- the impulse voltage generator of the present invention includes a high voltage generator that generates a high voltage, a capacitive element, a period setting signal in which one cycle includes a pulse supply period and a pulse pause period after the pulse supply period,
- the pulse signal is supplied with the pulse by superimposing a pulse signal whose frequency is an impulse repetition frequency higher than the frequency of the period setting signal and whose amplitude value is lower than the high voltage value.
- a signal generator that generates a combined signal that is generated only during a period; and when the voltage value of the combined signal is lower than a preset gate setting voltage value, the high voltage from the high voltage generator causes the capacitive element to When charge is accumulated and the voltage value of the combined signal is equal to or higher than the gate setting voltage value, the charge accumulated in the capacitor element is released and released from the capacitor element.
- FIG. 3 is a diagram illustrating a ramp wave as a waveform different from that in FIG. 2 in the impulse voltage generator according to the first embodiment of the present invention.
- the impulse voltage generator according to the first embodiment of the present invention it is a diagram showing a waveform when a pulse wave or a ramp wave is combined as a waveform different from those in FIGS.
- FIG. 6 is a diagram showing an impulse voltage when an X portion in FIG. 5 is enlarged in the impulse voltage generator according to the first embodiment of the present invention.
- FIG. 7 is a diagram showing the rise of the impulse voltage when the Y portion in FIG. 6 is enlarged in the impulse voltage generator according to the first embodiment of the present invention. It is a figure which shows the structure of the system with which the impulse voltage generator which concerns on 1st Embodiment of this invention is applied. As an example different from FIG.
- FIG. 8 it is a figure which shows the structure of the system by which the impulse voltage generator which concerns on 1st Embodiment of this invention is applied. It is a circuit diagram which shows the structure of the impulse voltage generator which concerns on 2nd Embodiment of this invention.
- the impulse voltage generator according to the first embodiment of the present invention when the inductance component is included in the load, it is a diagram showing the impulse voltage when the portion X in FIG. 5 is enlarged.
- the impulse voltage generator according to the second embodiment of the present invention when an inductance component is included in a load, it is a diagram showing an impulse voltage when the portion X in FIG. 5 is enlarged.
- the impulse voltage generator according to the first embodiment of the present invention is applied to a system as shown in FIG. 8, for example.
- the system includes a rotating electrical machine 1, an inverter 2, and a cable 3.
- Cable 3 connects the inverter 2 and the rotating electrical machine 1.
- the rotating electrical machine 1 include an electric motor (motor) and a generator.
- the inverter 2 converts a DC voltage into a pulse voltage by a switching operation, and supplies the pulse voltage to the rotating electrical machine 1 via the cable 3.
- the rotating electrical machine 1 is driven by a pulse voltage.
- a reflected wave is generated due to impedance mismatch between the inverter 2, the cable 3, and the rotating electrical machine 1.
- an inverter surge may occur at the connection portion 4 between the cable 3 and the rotating electrical machine 1.
- This inverter surge has a very short rise time (for example, 50 ns to 2 ⁇ s), and its fall time is longer than the rise time.
- the frequency when the inverter surge repeatedly occurs is, for example, 1 kHz to 20 kHz.
- the impulse voltage generator according to the first embodiment of the present invention realizes the above test.
- FIG. 1 is a circuit diagram showing a configuration of an impulse voltage generator according to a first embodiment of the present invention.
- the impulse voltage generator of the first embodiment includes a DC power supply 10, a high voltage generator (HVDC) 13, a capacitive element 16, a charging resistance element 21, and a load resistance element 22.
- the adjustment resistor element 23, the first output terminal 31, the second output terminal 32, the signal generator 33, the switching reverse voltage protection diode 34, and the semiconductor switch 40 are provided.
- the output of the high voltage generator 13 is connected to the first electrode (positive electrode) 11 of the capacitive element 16.
- the second electrode (negative electrode) 12 of the capacitive element 16 has the same potential as that of the second output terminal 32. Specifically, the second output terminal 32 is grounded.
- the high voltage generator 13 outputs a high voltage HVDC described later.
- the high voltage HVDC represents a potential difference from the first potential to the second potential of the high voltage generator 13.
- the first potential of the high voltage generator 13 is set to 0 [V] and the second potential of the high voltage generator 13 is set to the high voltage HVDC.
- the potential side wiring (not shown) and the casing (not shown) are grounded.
- the DC power supply 10 includes an input DC power supply 14 and a control DC power supply 15.
- the output of the input DC power supply 14 is connected to an input port (not shown) of the high voltage generator 13.
- the input DC power supply 14 outputs a DC voltage VDC described later.
- the DC voltage VDC represents a potential difference from the first potential to the second potential of the input DC power supply 14.
- the first potential of the input DC power source 14 is set to 0 [V] and the second potential of the input DC power source 14 is set to the DC voltage VDC.
- the potential side wiring (not shown) and the casing (not shown) are grounded.
- the output of the control DC power supply 15 is connected to an input port (not shown) of the high voltage generator 13, and the control DC power supply 15 controls the value of the current that can be passed through the high voltage generator 13 by the input port.
- a voltage (a control signal described later) is output.
- the voltage represents a potential difference from the first potential to the second potential of the control DC power supply 15.
- the first potential of the control DC power supply 15 is set in order to set the first potential of the control DC power supply 15 to 0 [V] and the second potential of the control DC power supply 15 to the above voltage.
- the side wiring (not shown) and the casing (not shown) are grounded.
- a charging resistance element 21 which is a resistance element is provided between the output of the high voltage generator 13 and the first electrode 11 of the capacitive element 16.
- a load resistance element 22 which is a resistance element is provided between the first output terminal 31 and the second output terminal 32.
- the connection portion 4 between the cable 3 and the rotating electrical machine 1 described above is provided as a load for supplying an impulse voltage.
- the semiconductor switch 40 includes a first terminal 41 connected to the first electrode 11 of the capacitive element 16, a second terminal 42 connected to the first output terminal 31, and a gate terminal 43.
- a resistance element is provided between the first terminal 41 and the second terminal 42.
- the semiconductor switch 40 is turned on when the voltage value supplied to the gate terminal 43 is equal to or higher than a preset gate setting voltage value, and connects the first terminal 41 and the second terminal 42.
- an adjustment resistance element 23 that is a resistance element is provided.
- the reverse voltage protection diode 34 for switch has a cathode connected to the first terminal 41 of the semiconductor switch 40 and an anode connected to the second terminal 42 of the semiconductor switch 40. That is, the switch reverse voltage protection diode 34 is provided in parallel with the semiconductor switch 40 and is used as a rectifier diode.
- the output of the signal generator 33 is connected to the gate terminal 43 of the semiconductor switch 40.
- the input DC power supply 14 generates a DC voltage VDC and supplies the DC voltage VDC to the high voltage generator 13.
- the high voltage generator 13 generates a high voltage HVDC (HVDC >> VDC) proportional to the DC voltage VDC supplied from the input DC power supply 14 and higher than the DC voltage VDC, and the high voltage HVDC has a capacity.
- the high voltage HVDC is a voltage that assumes a peak voltage of the above-described inverter surge or a value obtained by multiplying the peak voltage by a safety factor.
- the safety factor is also called an enhancement factor, and a predetermined numerical value such as 1.3 is used when the above-mentioned system or a coil component of the rotating electrical machine 1 in the system is strictly evaluated by a test. .
- the high voltage generator 13 generates a voltage 3000 times as high voltage HVDC as the DC voltage VDC supplied from the input DC power supply 14.
- the high voltage generator 13 outputs the high voltage HVDC in the range of 0V to 30 kV when the DC voltage VDC is in the range of 0V to 10V. That is, when the DC voltage VDC is 10 V, the high voltage generator 13 generates 30 kV, which is 3000 times the voltage of 10 V of the DC voltage VDC, as the high voltage HVDC.
- FIG. 2 is a diagram showing a pulse wave as the waveform of the high voltage HVDC that can be generated by the input DC power supply 14 in the high voltage generator 13.
- FIG. 3 is a diagram illustrating a ramp wave as a waveform different from that in FIG. 2.
- FIG. 4 is a diagram showing a waveform when a pulse wave or a ramp wave is combined as a waveform different from those in FIGS. 2 and 3.
- the control DC power supply 15 outputs a control signal for designating the voltage value, the rise time, and the fall time of the DC voltage VDC to the input DC power supply 14. As shown in FIGS. 3 to 5, the control DC power supply 15 adjusts the voltage value, the rise time, and the fall time of the DC voltage VDC by a control signal, so that, in addition to the constant high voltage HVDC, It is also possible to transform the waveform of the high voltage HVDC into a pulse wave, a ramp wave, and a waveform when a pulse wave or a ramp wave is combined.
- control DC power supply 15 can set the maximum value of the current flowing through the high voltage generator 13.
- FIG. 5 shows a period setting signal 50 and a pulse signal 53 generated by the signal generator 33 of the impulse voltage generator according to the first embodiment of the present invention, a combined signal 54 generated by the signal generator 33, and the semiconductor switch 40. Is a diagram showing an impulse voltage 55 generated based on a synthesized signal 54.
- FIG. 5 shows a period setting signal 50 and a pulse signal 53 generated by the signal generator 33 of the impulse voltage generator according to the first embodiment of the present invention, a combined signal 54 generated by the signal generator 33, and the semiconductor switch 40.
- the set frequency f1 is preset as the first frequency
- the first voltage value V1 is preset as the first amplitude value.
- the signal generator 33 generates a period setting signal 50 represented by a waveform (function) as shown in FIG. 5 when the set frequency f1 is set.
- the period setting signal 50 has a frequency of the set frequency f1 and an amplitude of the first voltage value V1.
- One period of the period setting signal 50 includes a pulse supply period 51 and a pulse pause period 52 after the pulse supply period 51.
- the pulse supply period 51 is a period representing the first voltage value V1 that is the amplitude value of the period setting signal 50
- the pulse pause period 52 is a period without an amplitude value. It is.
- the waveform of the period setting signal 50 is not limited to a square wave but may be a sine wave or a triangular wave.
- the signal generator 33 is preset with an impulse repetition frequency f2 (f2> f1) set higher than the set frequency f1 as a second frequency, and a second voltage value V2 as a second amplitude value in advance. Is set.
- the impulse repetition frequency f2 is a frequency assuming a case where the aforementioned inverter surge repeatedly occurs (for example, 1 kHz to 20 kHz).
- the signal generator 33 generates a pulse signal 53 as shown in FIG. 5 when the impulse repetition frequency f2 and the second voltage value V2 are set.
- the frequency of the pulse signal 53 is the impulse repetition frequency f2, and the amplitude thereof is the second voltage value V2.
- the impulse repetition frequency f2 is 10 kHz.
- the signal generator 33 When generating the pulse signal 53, the signal generator 33 superimposes the period setting signal 50 and the pulse signal 53 so that the pulse signal 53 is generated only in the pulse supply period 51 as shown in FIG. A signal 54 is generated and supplied to the gate terminal 43 of the semiconductor switch 40.
- This third voltage value V3 is determined by a combination of the gate setting voltage value Vg (for example, 5V) for turning on the semiconductor switch 40 and the specification of the signal generator 33, and is significantly lower than the value of the high voltage HVDC. It is higher than the gate setting voltage value Vg (Vg ⁇ V3 ⁇ HVDC).
- the first control signal is generated from the input DC power supply 14.
- the first control signal causes the high voltage generator 13 to generate a first high voltage (for example, 10 kV) that is the high voltage HVDC during the first pulse supply period that is the pulse supply period 51. That is, the first control signal generated from the input DC power supply 14 causes the first DC voltage (3.3 V) corresponding to the specified voltage value, rise time, and fall time to be supplied to the high voltage generator 13.
- the high voltage generator 13 When supplied, the high voltage generator 13 generates a voltage 3000 times as high as the first high voltage (10 kV) with respect to the first DC voltage (3.3 V).
- the control DC power supply 15 causes the first high voltage (10 kV), which is the high voltage HVDC. Does not occur.
- the semiconductor switch 40 is turned off when the third voltage value V3 that is the voltage value of the combined signal 54 supplied to the gate terminal 43 is lower than the gate setting voltage value Vg, and the first terminal 41 and the second terminal 42 are turned off. Do not connect.
- the high voltage HVDC applied from the high voltage generator 13 to the capacitive element 16 (in this case, the first high voltage (10 kV)) causes a gap between the first electrode 11 and the second electrode 12 of the capacitive element 16. Charge is accumulated. That is, the semiconductor switch 40 charges the capacitive element 16.
- the semiconductor switch 40 is turned on when the third voltage value V3 of the composite signal 54 supplied to the gate terminal 43 is equal to or higher than the gate setting voltage value Vg, and connects the first terminal 41 and the second terminal 42.
- the first electrode 11 of the capacitive element 16 is connected to the first output terminal 31 via the semiconductor switch 40 and the adjustment resistance element 23.
- the charge accumulated in the capacitive element 16 is released. That is, the semiconductor switch 40 discharges the capacitive element 16.
- the semiconductor switch 40 generates an impulse voltage 55 having a peak value of the high voltage HVDC ⁇ first high voltage (10 kV) ⁇ as shown in FIG.
- the generated impulse voltage 55 is output between the first output terminal 31 and the second output terminal 32.
- FIG. 6 is a diagram showing the impulse voltage 55 when the portion X in FIG. 5 is enlarged.
- FIG. 7 is a diagram showing the rise of the impulse voltage 55 when the Y portion in FIG. 6 is enlarged.
- the impulse voltage 55 has a very short rise time (for example, 20 ns to 200 ns) and a long fall time compared to the rise time (for example, 20 ⁇ s).
- the impulse width (the width from the end of the rise of the impulse voltage to the start of the fall) is 1 ⁇ s to 10 ⁇ s, and the impulse repetition frequency f2 is 1 kHz to 20 kHz (10 kHz in the above example).
- the impulse voltage generator of the first embodiment a test is performed in which the pulse supply period 51 in which the stable impulse voltage 55 is repeatedly generated and the pulse pause period 52 in which the impulse voltage 55 is not generated are alternately performed. Can be realized. Further, according to the impulse voltage generator of the first embodiment, the above-described system can be accurately evaluated by repeatedly generating the above-described impulse voltage 55.
- the impulse voltage generator of the first embodiment it is possible to realize a test in which the high voltage HVDC is gradually increased every pulse supply period 51.
- the second control signal is generated after the first control signal from the input DC power supply 14.
- the second control signal may be a second high voltage ⁇ e.g., a first high voltage that is a high voltage HVDC different from the first high voltage during the second pulse supply period, which is the next pulse supply period 51 of the first pulse supply period.
- the high voltage generator 13 generates 12 kV ⁇ higher than the voltage (10 kV). That is, the second control signal generated from the input DC power supply 14 causes the second DC voltage (4.0 V) corresponding to the specified voltage value, rise time, and fall time to be supplied to the high voltage generator 13.
- the high voltage generator 13 When supplied, the high voltage generator 13 generates a voltage 3000 times as high as the second high voltage (12 kV) with respect to the second DC voltage (4.0 V). However, when the value of the current flowing through the high voltage generator 13 exceeds the current value defined by the control DC power supply 15, the control DC power supply 15 causes the second high voltage (12 kV), which is the high voltage HVDC. Does not occur.
- the semiconductor switch 40 is turned off when the third voltage value V3 that is the voltage value of the combined signal 54 supplied to the gate terminal 43 is lower than the gate setting voltage value Vg, and the first terminal 41 and the second terminal 42 are turned off. Do not connect.
- the high voltage HVDC applied from the high voltage generator 13 to the capacitive element 16 (in this case, the second high voltage (12 kV)) causes a gap between the first electrode 11 and the second electrode 12 of the capacitive element 16. Charge is accumulated. That is, the semiconductor switch 40 charges the capacitive element 16.
- the semiconductor switch 40 is turned on when the third voltage value V3 of the composite signal 54 supplied to the gate terminal 43 is equal to or higher than the gate setting voltage value Vg, and connects the first terminal 41 and the second terminal 42.
- the first electrode 11 of the capacitive element 16 is connected to the first output terminal 31 via the semiconductor switch 40 and the adjustment resistance element 23. At this time, the charge accumulated in the capacitive element 16 is released.
- the semiconductor switch 40 generates an impulse voltage 55 whose peak value is the value of the high voltage HVDC ⁇ second high voltage (12 kV) ⁇ by the electric charge discharged from the capacitive element 16, and the impulse voltage 55 Is output between the first output terminal 31 and the second output terminal 32.
- the input DC power supply 14 has, for example, first to sixth pulse supply periods 51.
- the first to sixth high voltages (10 kV, 12 kV, 14 kV, 16 kV, 18 kV, 20 kV) ⁇ are generated in the high voltage generator 13 as the high voltage HVDC that gradually increases.
- the semiconductor switch 40 repeatedly generates the above-described impulse voltage 55 during the first to sixth pulse supply periods 51 by the switching operation based on the synthesized signal 54 generated by the signal generator 33.
- the high voltage HVDC is gradually increased every pulse supply period 51, and then the high voltage HVDC is gradually increased every pulse supply period 51 at a predetermined timing or at an arbitrary timing. It is also possible to achieve a test that reduces the In this case, for example, the input DC power supply 14 uses the first to sixth high voltages (10 kV, 12 kV, 14 kV, 16 kV, 18 kV, 20 kV) as the high voltage HVDC that gradually increases during the first to sixth pulse supply periods 51. ) Is generated in the high voltage generator 13.
- the seventh to eleventh high voltages (18 kV, 16 kV, 14 kV, 12 kV, 10 kV) are generated in the high voltage generator 13 as the high voltage HVDC that is gradually decreased during the seventh to eleventh pulse supply periods 51.
- the semiconductor switch 40 repeatedly generates the impulse voltage 55 described above during the first to eleventh pulse supply periods 51 by the switching operation based on the combined signal 54 generated by the signal generator 33.
- the high voltage HVDC is gradually increased for each pulse supply period 51, and the high voltage HVDC for each pulse supply period 51 is made constant at a predetermined timing or at an arbitrary timing.
- the input DC power supply 14 uses the first to sixth high voltages (10 kV, 12 kV, 14 kV, 16 kV, 18 kV, 20 kV) as the high voltage HVDC that gradually increases during the first to sixth pulse supply periods 51. ) Is generated in the high voltage generator 13.
- the sixth high voltage (20 kV) is generated in the high voltage generator 13 as a constant high voltage HVDC during the seventh to eleventh pulse supply periods 51.
- the semiconductor switch 40 repeatedly generates the impulse voltage 55 described above during the first to eleventh pulse supply periods 51 by the switching operation based on the combined signal 54 generated by the signal generator 33.
- the high voltage HVDC is gradually decreased every pulse supply period 51, and the high voltage HVDC for each pulse supply period 51 is made constant at a predetermined timing or at an arbitrary timing.
- the input DC power supply 14 uses the first to sixth high voltages (20 kV, 18 kV, 16 kV, 14 kV, 12 kV, 10 kV) as the high voltage HVDC that gradually increases during the first to sixth pulse supply periods 51. ) Is generated in the high voltage generator 13.
- the sixth high voltage (10 kV) is generated in the high voltage generator 13 as the constant high voltage HVDC during the seventh to eleventh pulse supply periods 51.
- the semiconductor switch 40 repeatedly generates the impulse voltage 55 described above during the first to eleventh pulse supply periods 51 by the switching operation based on the combined signal 54 generated by the signal generator 33.
- the impulse voltage generator of the first embodiment a test is performed in which the pulse supply period 51 in which the stable impulse voltage 55 is repeatedly generated and the pulse pause period 52 in which the impulse voltage 55 is not generated are alternately performed.
- a plurality of types of impulse voltages 55 can be generated for each pulse supply period 51.
- the impulse voltage generator according to the first embodiment of the present invention can be applied to a system as shown in FIG. 9, for example, in addition to the above-described system (see FIG. 8).
- FIG. 9 is a diagram showing a configuration of a system to which the impulse voltage generator according to the first embodiment of the present invention is applied as an example different from FIG.
- a linear motor 5 is provided in place of the rotary electric machine 1 described above.
- the linear motor 5 is used for, for example, a magnetically levitated linear motor car and other applications.
- the cable 3 connects the inverter 2 and the linear motor 5 or its coil component.
- the inverter 2 converts the DC voltage into a pulse voltage by a switching operation, and supplies the pulse voltage to the linear motor 5 via the cable 3.
- the linear motor 5 is driven by a pulse voltage.
- FIG. 10 is a circuit diagram showing a configuration of an impulse voltage generator according to the second embodiment of the present invention.
- FIG. 11 is a diagram showing the impulse voltage when the portion X in FIG. 5 is enlarged when the inductance component is included in the load in the impulse voltage generator according to the first embodiment of the present invention.
- FIG. 12 is a diagram showing the impulse voltage when the portion X in FIG. 5 is enlarged when the inductance component is included in the load in the impulse voltage generator according to the second embodiment of the present invention.
- the impulse voltage generator of the second embodiment includes a load reverse voltage protection diode 44 in addition to the configuration of the first embodiment.
- the reverse voltage protection diode for load 44 has a cathode connected to the first output terminal 31 and an anode connected to the second output terminal 32. That is, the load reverse voltage protection diode 44 is provided in parallel to the load resistance element 22 and the load, and is used as a rectifier diode.
- the impulse voltage generator when an inductance component is included in the load between the first output terminal 31 and the second output terminal 32, a back electromotive force is generated by the inductance component. .
- the first wave having the positive high voltage HVDC as a peak value is generated, and then stable to 0 [V].
- the voltage after the second wave is generated.
- a back electromotive force generated by an inductance component generates a second wave having a negative voltage peak value after the first wave. That is, a reverse voltage is generated.
- the reverse voltage generates a third wave having a positive voltage peak value after the second wave, and a fourth wave having a negative voltage peak value after the third wave.
- the component necessary as the impulse voltage 55 is the first wave.
- the reverse voltage protection diode 44 for the load causes the above reverse voltage. Prevent voltage.
- the impulse voltage 55 is generated in the pulse supply period 51, the first wave having the positive high voltage HVDC as the peak value even if the load includes an inductance component. Only occurs. Therefore, according to the impulse voltage generator of the second embodiment, only a component necessary as the impulse voltage 55 can be obtained.
- Reverse voltage protection diode 50 for load ... Period setting signal 51 ... Pulse supply period 52 ... Pulse pause period 53 ... Pulse signal 54 ... Composite signal 55 ... Impulse voltage f1 ... Set frequency f2 ... Impulse repetition frequency HVDC ... High voltage V1 ... First voltage value V2 ... Second voltage value V3 ... Third voltage value VDC ... DC voltage Vg... Gate setting voltage value
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- General Physics & Mathematics (AREA)
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- Testing Relating To Insulation (AREA)
- Inverter Devices (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
Description
本発明の第1実施形態に係るインパルス電圧発生装置は、たとえば図8に示されるようなシステムに適用される。そのシステムは、回転電機1と、インバータ2と、ケーブル3とを具備している。
第2実施形態について、第1実施形態の変更点のみ説明する。
2 … インバータ
3 … ケーブル
4 … 接続部
5 … リニアモーター
10 … 直流電源
11 … 第1電極(正電極)
12 … 第2電極(負電極)
13 … 高電圧発生器
14 … 入力用直流電源
15 … 制御用直流電源
16 … 容量素子
21 … 充電抵抗素子
22 … 負荷抵抗素子
23 … 調整抵抗素子
31 … 第1出力端子
32 … 第2出力端子
33 … 信号発生器
34 … スイッチ用逆電圧保護ダイオード
40 … 半導体スイッチ
41 … 第1端子
42 … 第2端子
43 … ゲート端子
44 … 負荷用逆電圧保護ダイオード
50 … 期間設定信号
51 … パルス供給期間
52 … パルス休止期間
53 … パルス信号
54 … 合成信号
55 … インパルス電圧
f1 … 設定周波数
f2 … インパルス繰り返し周波数
HVDC … 高電圧
V1 … 第1電圧値
V2 … 第2電圧値
V3 … 第3電圧値
VDC … 直流電圧
Vg … ゲート設定電圧値
Claims (10)
- 高電圧を発生する高電圧発生器と、
容量素子と、
その1周期がパルス供給期間および前記パルス供給期間の後のパルス休止期間を含む期間設定信号と、その周波数が前記期間設定信号の周波数よりも高いインパルス繰り返し周波数であり、かつ、その振幅値が前記高電圧の値よりも低い電圧値を表すパルス信号とを重ね合わせて、前記パルス信号が前記パルス供給期間にのみ発生する合成信号を生成する信号発生器と、
前記合成信号の電圧値が予め設定されたゲート設定電圧値よりも低いときに前記高電圧発生器からの前記高電圧により前記容量素子に電荷を蓄積させ、前記合成信号の電圧値が前記ゲート設定電圧値以上であるときに、前記容量素子に蓄積された電荷を放出させ、前記容量素子から放出される電荷により前記高電圧の値をピーク値とするインパルス電圧を発生し、負荷が設けられた第1出力端子と第2出力端子との間に前記インパルス電圧を供給する半導体スイッチと、
を具備することを特徴とするインパルス電圧発生装置。 - 前記高電圧発生器の出力は前記容量素子の第1電極に接続され、
前記半導体スイッチは、前記容量素子の第1電極に接続された第1端子と、前記第1出力端子に接続された第2端子と、前記信号発生器の出力に接続されたゲート端子とを備え、
前記半導体スイッチは、
前記ゲート端子に供給される前記合成信号の電圧値が前記ゲート設定電圧値よりも低いときに、前記半導体スイッチを介して前記容量素子の第1電極と前記第1出力端子とを接続しないで、前記高電圧発生器からの前記高電圧により前記容量素子の第1電極と第2電極との間に電荷を蓄積させ、
前記ゲート端子に供給される前記合成信号の電圧値が前記ゲート設定電圧値以上であるときに、前記半導体スイッチを介して前記容量素子の第1電極と前記第1出力端子とを接続して、前記容量素子に蓄積された電荷を放出させ、前記容量素子から放出される電荷により前記高電圧の値をピーク値とする前記インパルス電圧を発生し、前記第1出力端子と、前記容量素子の第2電極の電位と同電位の前記第2出力端子との間に前記インパルス電圧を供給する、
ことを特徴とする請求項1に記載のインパルス電圧発生装置。 - 前記高電圧発生器の出力と前記容量素子の第1電極との間に設けられた抵抗素子である充電抵抗素子と、
前記第1出力端子と前記第2出力端子との間に設けられた抵抗素子である負荷抵抗素子と、
前記半導体スイッチの前記第2端子と前記第1出力端子との間に設けられた抵抗素子である調整抵抗素子と、
をさらに具備することを特徴とする請求項2に記載のインパルス電圧発生装置。 - 前記半導体スイッチの前記第1端子にカソードが接続され、前記半導体スイッチの前記第2端子にアノードが接続されたスイッチ用逆電圧保護ダイオード、
をさらに具備することを特徴とする請求項2または請求項3に記載のインパルス電圧発生装置。 - 直流電圧を発生する直流電源をさらに具備し、
前記高電圧発生器は、前記直流電源から供給される前記直流電圧に比例し、かつ、前記直流電圧よりも高い前記高電圧を発生する、
ことを特徴とする請求項1ないし請求項4のいずれか一項に記載のインパルス電圧発生装置。 - 前記直流電源は、前記高電圧を制御するために予め指定された電圧値、立ち上がり時間、および、立ち下がり時間に応じて前記直流電圧を前記高電圧発生器に供給する、
ことを特徴とする請求項5に記載のインパルス電圧発生装置。 - 前記直流電源は、
前記パルス供給期間である第1パルス供給期間中に前記高電圧である第1高電圧を前記高電圧発生器に発生させるために、前記第1高電圧に比例した前記直流電圧である第1直流電圧を前記高電圧発生器に供給し、
前記第1パルス供給期間の次の第2パルス供給期間中に前記第1高電圧とは異なる第2高電圧を前記高電圧発生器に発生させるために、前記第2高電圧に比例した前記直流電圧である第2直流電圧を前記高電圧発生器に供給する、
ことを特徴とする請求項6に記載のインパルス電圧発生装置。 - 前記インパルス電圧発生装置は、回転電機と、前記回転電機を駆動するためのパルス電圧を出力するインバータと、前記インバータと前記回転電機とを接続するケーブルと、を具備するシステム、または、そのシステムにおける前記回転電機のコイル部品を評価するときに用いられ、
前記高電圧は、前記ケーブルと前記回転電機との接続部に発生する可能性があるインバータサージのピーク電圧、または、そのピーク電圧に安全係数を乗じた値を想定した電圧であり、
前記インパルス繰り返し周波数は、前記インバータサージが繰り返し発生する場合を想定した周波数である、
ことを特徴とする請求項1ないし請求項7のいずれか一項に記載のインパルス電圧発生装置。 - 前記インパルス電圧発生装置は、リニアモーターと、前記リニアモーターを駆動するためのパルス電圧を出力するインバータと、前記インバータと前記リニアモーターまたはそのコイル部品とを接続するケーブルと、を具備するシステムを評価するときに用いられ、
前記高電圧は、前記ケーブルと前記リニアモーターとの接続部に発生する可能性があるインバータサージのピーク電圧、または、そのピーク電圧に安全係数を乗じた値を想定した電圧であり、
前記インパルス繰り返し周波数は、前記インバータサージが繰り返し発生する場合を想定した周波数である、
ことを特徴とする請求項1ないし請求項7のいずれか一項に記載のインパルス電圧発生装置。 - 前記第1出力端子にカソードが接続され、前記第2出力端子にアノードが接続され、前記負荷に対して並列に設けられた負荷用逆電圧保護ダイオード、
をさらに具備することを特徴とする請求項1ないし請求項9のいずれか一項に記載のインパルス電圧発生装置。
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