WO2004010570A1 - 電力変換装置 - Google Patents
電力変換装置 Download PDFInfo
- Publication number
- WO2004010570A1 WO2004010570A1 PCT/JP2002/007316 JP0207316W WO2004010570A1 WO 2004010570 A1 WO2004010570 A1 WO 2004010570A1 JP 0207316 W JP0207316 W JP 0207316W WO 2004010570 A1 WO2004010570 A1 WO 2004010570A1
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- WIPO (PCT)
- Prior art keywords
- command value
- power converter
- value
- voltage command
- pwm signal
- Prior art date
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- 238000001514 detection method Methods 0.000 claims abstract description 61
- 238000005070 sampling Methods 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000001629 suppression Effects 0.000 claims description 4
- 230000002265 prevention Effects 0.000 description 42
- 238000010586 diagram Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 12
- 230000000630 rising effect Effects 0.000 description 7
- 230000010349 pulsation Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 241001125929 Trisopterus luscus Species 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- 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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- 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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33515—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with digital control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
Definitions
- the present invention relates to a power converter based on PWM (Pulse Width Modulation) control, and more particularly to a control for detecting a current value of a load driven by a power converter and performing feedback control of the current value to follow a current command value. It concerns equipment.
- PWM Pulse Width Modulation
- a conventional power converter driven by PWM control calculates a voltage command value from a load current command value and a current detection value, compares the voltage command value with a triangular wave carrier, and generates a PWM pulse. Then, the power converter is driven by the PWM pulse to control the load. In this case, the command value and the detection value are sampled simultaneously in the same period, each value is read, and the sample and hold method is adopted.
- the power conversion device In order to remove the pulsation component, the power conversion device according to this proposal is provided with a sample value compensator for averaging the sample of the command value and the output of the hold unit, thereby removing the pulsation component.
- the power converter as described above has a sample value compensator for removing a pulsation component included in the current detection value, and calculates the average value of the current obtained through the sample value compensator. Since the current detection value changes steeply, the sample value compensator averages even if the current detection value changes sharply. There was a problem that a high-speed response could not be obtained.
- the voltage command value calculator since the current command value does not include the current ripple component, the voltage command value calculator generates a voltage for reducing the current ripple component, and as a result, the fluctuation of the voltage command value increases.
- FIG. 19 shows this state, and the voltage command value crosses the triangular wave carrier multiple times in a half cycle of the triangular wave carrier due to a large fluctuation of the voltage command value. Therefore, in the part circled in the figure, the pulse number of the PWM signal, which is the output of the comparator, increases.
- the PWM signal is a signal for driving the power switching element in the power converter, if the number of pulses increases, the number of switching times of the power switching element increases, causing an increase in switching loss. There is a problem that a switching element for power must be used.
- the present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a power conversion device that can obtain a high-speed current response without increasing the number of pulses of a PWM signal, that is, without generating multiple pulses. It is the purpose.
- the power conversion device according to the first invention includes a triangular wave carrier generating means for generating a triangular wave carrier according to a first cycle, and setting a first current command value of the power converter shorter than half of the first cycle.
- First sampling means for sampling at the obtained second cycle and generating a second current command value, and a first current detection value of a load driven by the power converter in the second cycle.
- a voltage command value calculating means for calculating a voltage command value based on the second current command value and the second current detected value.
- the second Comparing means for comparing a voltage command value with the triangular wave carrier to generate a first PWM signal; inverting detecting means for detecting that the first PWM signal has been inverted; Reversal suppressing means for driving the power converter with a second PWM signal that suppresses reversal of the first PWM signal within the first cycle based on the detection. That is what you do.
- the inversion detecting unit in a state where the sampling period of the first and second sampling units is set to the second period shorter than the half period of the triangular wave carrier, the inversion detecting unit outputs the first PWM signal. Detecting the inversion, the inversion suppressing means generates a second PWM signal in which the inversion of the first PWM signal is suppressed within a half cycle of the triangular wave carrier based on the detection of the inversion detecting means, The power converter is driven by the second PWM signal. Therefore, the power converter 2 is driven by the second PWM signal in which the number of pulses is suppressed while realizing a high-speed current response, so that the switching loss of the power converter can be suppressed.
- a power converter includes a triangular wave carrier generating means for generating a triangular wave carrier at a first cycle, and a first current command value of the power converter set to be shorter than half of the first cycle.
- a first sampling means for sampling a second current command value and sampling a first current detection value of a load driven by the power converter in the second cycle.
- Crossing detection means for detecting that the first voltage command value intersects with the triangular wave carrier, and the triangular wave carrier within the first cycle based on the detection of the crossing detection means.
- a voltage command value suppressing means for generating a second voltage command value in which a change in the first voltage command value is suppressed so as not to cross again, and comparing the second voltage command value with the triangular wave carrier.
- the P Comparing means for driving the power converter by a WM signal.
- the intersection detecting means sets the voltage command value and the triangular wave carrier together. Detecting the intersection, the voltage command value suppression means suppresses the change of the first voltage command value so that the voltage command value does not cross the triangle wave carrier again within a half cycle of the triangle wave carrier. Generate a voltage command value. Therefore, by suppressing the intersection of the second voltage command value and the triangular wave carrier, the inversion of the first PWM signal is suppressed. Therefore, since the power converter is driven by the first PWM signal in which the number of pulses is suppressed while realizing a high-speed current response, switching loss can be suppressed.
- the power converter determines a pulse width difference between the first PWM signal and the second PWM signal, and generates the second PWM signal generated after the next half cycle of the triangular wave carrier.
- Error compensating means for generating a third PWM signal obtained by adding a difference to the pulse width of the PWM signal, and driving the power converter with the third PWM signal instead of the second PWM signal. It is assumed that.
- the pulse width calculating means obtains a difference pulse width that is a difference between the first PWM signal and the second PWM signal, and generates the differential pulse width generated after the first half cycle.
- the power converter is driven by a third PWM signal obtained by adding a difference pulse width to the PWM signal of the second.
- the switching loss of the power converter can be suppressed by suppressing the inversion of the second PWM signal while realizing a high-speed current response, and furthermore, the first PWM signal and the third PWM signal can be suppressed. Since the total pulse widths are equal, there is an effect that the operation of the power converter faithful to the voltage command value can be realized.
- the power converter according to the fourth invention is characterized in that the first half cycle of the triangular wave carrier is Command voltage difference calculating means for obtaining a difference voltage command value that is a difference between the first voltage command value and the second voltage command value in the second voltage command value.
- Voltage command correction means for adding a third voltage command value to which the differential voltage command value has been added; and comparing the third power J3E command value with the triangular wave carrier in place of the second voltage command value, and
- the present invention is characterized in that a comparison means for generating a WM signal and driving the power converter by the PWM signal is provided.
- the switching loss of the power converter can be suppressed by suppressing the inversion of the first PWM signal by suppressing the intersection of the voltage command value and the triangular wave carrier while realizing a high-speed current response, and furthermore, The effect is that the operation of the power converter faithful to the first voltage command value, which is the original voltage command, can be realized.
- the power converter according to a fifth aspect of the present invention is a power converter that switches from the second or third PWM signal to drive the power converter based on the first PWM signal by a switching command signal. And a means.
- the first switching means when there is a margin for switching loss of the power converter, the first switching means can select the first PWM signal to realize a high-speed response to a command, and conversely, however, when there is no margin for the switching loss, there is an effect that the first switching means can select the second PWM signal and suppress the switching loss.
- a power converter according to a sixth invention is characterized by comprising: second switching means for switching a first voltage command value from a second or third voltage command value by a switching command signal. .
- the second switching means selects the first voltage command value.
- the second switching means can select the second voltage command value to suppress the switching loss.
- the power converter according to a seventh aspect of the present invention is configured to compare the difference between a second current command value and a second current detection value with a predetermined current reference value so that the difference is greater than the current reference value. And a current comparing means for generating a switching command signal when the value is larger.
- the current comparison means selects the first voltage command or the first PWM signal by the switching command signal when the difference is larger than the current reference value, and realizes a high-speed response. Conversely, when the difference between the currents is small, there is an effect that the first and second switching means can select the second voltage command or the second PWM signal to suppress the switching loss.
- the power conversion device is a power conversion device, comprising: a frequency detection unit that outputs a frequency detection value obtained by counting the number of times of switching of the power converter in a predetermined time; and comparing a predetermined frequency reference value with the frequency detection value. And a frequency comparing means for generating the switching command signal when the frequency detection value is lower than the frequency reference value.
- the number-of-times comparing means can select the first PWM signal or the first voltage command value to realize a high-speed response to the command. Conversely, when the number-of-times detection value is higher than the number-of-times reference value, there is an effect that the second voltage command value or the second PWM signal can be selected to suppress the switching loss of the power converter.
- the power converter according to the ninth invention is characterized in that the temperature detection means detects the temperature of the power converter, and compares the temperature detection value with a predetermined temperature reference value so that the temperature detection value is higher than the reference temperature value And a temperature comparing means for generating a switching command signal when the temperature is low.
- the temperature comparison means can select the first PWM signal or the first voltage command value to realize a high-speed response to the command. Conversely, when the detected temperature value is higher than the reference temperature value, the second voltage command value or the second PWM signal can be selected to suppress the switching loss of the power converter.
- FIG. 1 is a block diagram of a power converter according to an embodiment.
- FIG. 2 is an internal connection diagram of the multi-pulse prevention device according to the embodiment.
- FIG. 3 is a time chart of the triangular wave carrier and the multi-pulse prevention device according to the embodiment.
- FIG. 4 is a block diagram of a power converter according to another embodiment.
- FIG. 5 is a time chart of the multipulse prevention device used in the power converter of FIG.
- FIG. 6 is a flowchart of the multi-pulse prevention device of FIG.
- FIG. 7 is a block diagram of a power converter according to another embodiment.
- FIG. 8 is a time chart of the triangular wave carrier and the multi-pulse prevention device by the power converter of FIG.
- FIG. 9 is a flowchart showing the operation of the power converter of FIG. 8.
- FIG. 10 is a block diagram of the power converter according to another embodiment.
- FIG. 11 is a time chart of the triangular wave carrier and the multipulse preventing device by the power converter of FIG.
- FIG. 12 is a flowchart showing the operation of the power converter of FIG.
- FIG. 13 is a block diagram of a power converter according to another embodiment.
- FIG. 14 is a time chart showing the operation of the power converter of FIG. .
- FIG. 15 is a block diagram of a power converter according to another embodiment.
- FIG. 16 is a time chart showing the operation of the power converter shown in FIG. .
- FIG. 17 is a block diagram of a power converter according to another embodiment.
- FIG. 18 is a time chart showing the operation of the power converter shown in FIG.
- FIG. 19 is a diagram for explaining the operation of the conventional power converter. BEST MODE FOR CARRYING OUT THE INVENTION
- a power converter according to an embodiment of the present invention will be described with reference to a block diagram shown in FIG.
- a power converter 1 includes a power converter (power conversion means) 2 having a power switching element such as a transistor, and a current as a current command value generating means for generating a current command value for the power converter 2.
- a command value generator 4 a first sampler (first sampling means) 5 for sampling the first current command value of the power converter 2, and outputting a second current command value, and a load 3
- a second sampler (second sampling means) 6 for sampling a first current detection value of a current detector 2 s for detecting a current flowing through the second sampling device and outputting a second current detection value; And the sampling timing of the second samplers 5 and 6, and generates a sampling signal having a second cycle shorter than the half cycle tcZ2 of the triangular wave carrier Vc in synchronization with a triangular wave carrier described later.
- a subtractor 8 for obtaining the difference between the sampling signal generator 7 and the output of the first sampler 5 and the second sampler 6, that is, the difference between the second current command value and the second current detection value.
- a voltage command value calculator 9 for calculating the voltage command value of the power converter 2 based on the output of the subtractor 8, and generating a square wave carrier Vc in the first cycle. Then, every half cycle of the triangular wave carrier Vc, that is, in synchronization with the minimum amplitude value Vcmin of the triangular wave carrier Vc, and falls from the rising edge in synchronization with the maximum amplitude value Vcmax of the triangular wave carrier Vc.
- a triangular wave carrier generator 10 that generates a triangular wave synchronizing signal Tc that repeats the inversion of the above, and a first PWM signal having a pulse from rising to falling by comparing the voltage command value Vr and the triangular wave carrier Vc.
- Comparing means 11, a multi-pulse preventing device 12 that receives the first PWM signal and outputs a second PWM signal, and is driven by the second PWM signal Power converter 2.
- Reference numeral 3 denotes a load driven by the power converter 2.
- the multi-pulse prevention device 12 is called inversion when the pulse of the first PWM signal rises (falls) from rising (falling). Inversion detection for detecting the inversion of the first PWM signal is performed. Means for inverting the first PWM signal within a half cycle of the triangular wave carrier Vc based on the detection of the inversion detecting means, that is, generating a second PWM signal in which re-inversion is suppressed. And an inversion suppressing means for driving the power converter 2 by the second PWM signal. Specifically, the multi-pulse prevention device 1 2 calculates an exclusive OR of the input signal Pin and the triangular wave carrier Tc as the first PWM signal, and generates an exclusive OR element 1 that generates the signal Sa. 3, an AND element 14 for obtaining a logical product of the signal Sa and the high frequency clock signal CLK to generate a signal Sc, and a second PWM signal P out And a latch element 15 composed of a D-type flip-flop that generates
- the first sampler 5 samples the first current command value generated from the current command value generator 4 and outputs a second current command value
- the second sampler 6 outputs the second current command value to the power converter 2.
- the first current detection value obtained by detecting the flowing current with the current detector 2S is sampled and Outputs the current command value of 2.
- the subtracter 8 calculates a deviation between the current command value and the current detection value and inputs the deviation to the voltage command value calculator 9.
- Voltage command value calculator 9 calculates and outputs voltage command value Vc of voltage converter 2 so as to reduce the deviation.
- the comparator 11 compares the voltage command value Vr with the triangular wave carrier Vc to generate a first PWM signal serving as a pulse train for driving the voltage converter 2.
- the multi-pulse prevention means 12 generates a second PWM signal P-out from the first PWM signal P_in and the triangular wave synchronization signal Tc, inputs the generated PWM signal P-out to the power converter 2, By operating the switching element (2), a voltage is generated at the output to drive the load (3).
- the current flowing through the power converter 2 is sampled by the second sampler 6, and the voltage command value calculator 9 controls the current command value and the current detection value so that the deviation between the current command value and the current detection value is reduced. Operate power converter 2 so as to follow the command value.
- the multi-pulse prevention device 12 detects and stores that the first PWM signal P_in has been inverted, and prevents reinversion in the half cycle tc / 2 of the triangular wave carrier Vc. Outputs the second PWM signal P-out.
- the comparator 11 compares the voltage command value Vr with the triangular wave carrier Vc and outputs a first PWM signal P_in.
- the pulse of the first PWM signal P_in rises at time t0, and at time t1 in the half cycle tc / 2 of the triangular wave carrier Vc, the value first inverts due to the fall, and the pulse rises at time t2.
- the pulse re-inverts, and at time t3, the pulse falls and re-inverts again.
- the exclusive OR element 13 inputs the triangular wave synchronization signal Tc and the first PWM signal P-in, and outputs a signal Sa.
- the AND element 14 receives the signal Sa and the clock signal CLK and outputs a signal Sc.
- Latch element 1 5 Receives the signal Sc and the triangular wave synchronization signal Tc, and outputs a second PWM signal P_out as a latch output.
- the second PWM signal P_out rises almost in synchronization with the rising of the first PWM signal, and detects the first inversion of the first PWM signal at time tl by the action of the latch element 15. After storage, no reversal occurs at times tl to t4. That is, a pulse is generated in the first PWM signal between times t2 and t3, but the pulse is not generated in the second PWM signal.
- the power converter device 1 since the generation of multiple pulses in the second PWM signal for driving the power converter 2 is prevented, the number of times of switching of the power switching elements constituting the power converter 2 is suppressed. In addition, it is possible to suppress a temperature rise of the power switching element. Moreover, since a sampling signal having a cycle shorter than a half cycle of the triangular wave carrier is used, a high-speed current response can be obtained.
- FIG. 4 Another embodiment of the present invention will be described with reference to the block diagram of the power converter shown in FIG. 4, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and a description thereof will be omitted.
- a second multi-pulse prevention device 20 includes an intersection detecting means for detecting that the first voltage command value generated from the voltage command value calculating means 9 crosses the triangular wave carrier. Generates a second voltage command value based on the detection of the crossing detection means, in which the change of the first voltage command value is suppressed so as not to cross the triangular wave carrier again in the first half of the triangular wave carrier.
- the cycle of the sampling signal generated by the sampling signal generator 7 is 1/5 of a half cycle of the triangular wave carrier.
- the sampling signal is generated at the beginning of each section shown in sections 1 to 5, and in the triangular wave carrier, the decreasing period is mode 1 and the increasing period is mode 2.
- the sampling signal generator 7 supplies the same sampling signal Sm to the first and second sampling devices 5 and 6, and the voltage command value calculator 9 calculates from the sampling of the current command value and the current detection value. Assuming that the first voltage command value is output with a delay time of zero, the first voltage command value is updated at the beginning of each section.
- the multipulse prevention device 20 does not exist, that is, if the output of the voltage command value calculator 9 is directly connected to the comparator 11, in mode 1, the first voltage command value Vrl is When the state shifts from a state smaller than c to a state larger than c, the comparator 11 detects that the first voltage command value Vrl and the triangular wave carrier Vc intersect, inverts the original PWM signal and outputs the inverted signal.
- the comparator 11 detects that the first voltage command value Vrl crosses the triangular wave carrier. Invert the original PWM signal. From the above, it is determined whether or not the original PWM signal is inverted in each section (section) by checking the magnitude of the first voltage command value Vrl and determining whether or not the signal crosses the triangular wave carrier Vc. Just do it.
- the voltage value of the triangular wave carrier Vc changes linearly between 0.0 and 1.0.
- the voltage value of the triangular wave carrier Vc at the boundary of each section is 1.0, 0.8, 0.6, 0.4, 0.4. 2, 0.0.
- the voltage value of the triangular wave carrier Vc is When increasing, the voltage value of the triangular wave carrier Vc at the boundary of each section is 0.0, 0.2, 0.4, 0.6, 0.8, 1.0.
- the value is smaller than the boundary value 0.8 with the section 2 of the mode 1 which becomes the voltage value of the triangle wave carrier Vc, so that the first voltage command value Vrl and the triangle wave carrier Vc do not intersect.
- the first voltage command value is 0.78, which is larger than the boundary value 0.6 with the section 3 of mode 1 which is the voltage value of the triangular wave carrier Vc.
- the command value Vrl and the triangular wave carrier Vc intersect. Therefore, in mode 1, inversion of the original PWM signal occurs in section 2 within a half cycle of the triangular wave carrier Vc.
- mode 1 after the first voltage command value Vrl and the triangular wave carrier Vc cross each other, the first voltage command value Vrl changes from a state smaller than the triangular wave carrier Vc to a larger state again.
- the intersection of the voltage command value Vrl and the triangular wave carrier Vc again causes the inversion of the original PWM signal at the last boundary of section 3.
- the first voltage command value Vrl changes from a state smaller than the triangular wave carrier to a larger state again, so that the first voltage command value Vrl and the triangular wave carrier cross again.
- mode 1 when the first voltage command value Vrl becomes larger than the triangular wave carrier, the first voltage command value Vrl changes to a constant value that suppresses the change of the first voltage command value Vrl until the next mode is entered.
- a second voltage command value Vr2 that is not generated is generated such that the second voltage command value Vr2 does not shift to a state smaller than the triangular wave carrier Vc.
- the multi-pulse prevention device 20 reads the voltage command value Vrl (step S20a) and determines whether or not the operation has shifted to a half cycle of a new triangular wave carrier Vc (step S20b). If the process has shifted to the half cycle, the flag flg for detecting and storing the intersection of the first voltage command value and the triangular wave carrier Vc is cleared (step S20c).
- the multi-pulse prevention device 20 determines the flag flg (step S20d). If the first voltage command value and the triangular wave carrier Vc do not intersect by the previous interval, step 20e The intersection of the subsequent voltage command value and the triangular wave carrier Vc is determined. First, it is determined whether the mode is 1 or 2 (step S20e). This is because the boundary value of each section is different between Mode 1 in which the triangle wave carrier decreases and Mode 2 in which the triangle wave carrier increases.
- step S20f or S20g the intersection of the first voltage command value and the triangular wave carrier in each mode is determined based on whether or not the output of the comparator 11 is inverted.
- step 20f or 20g if it is determined that they cross, the current voltage command value Vrl is stored as Vtmp, the flag flg is set (step S20h), and the current Vout is output to Vout. Insert the voltage command value V rl of.
- step S20i If it is determined in step 20 f or 20 g that they do not intersect , The current voltage command value Vrl is input to the output Vout (step S20i). In the determination of the flag flg in step S20d, if the first voltage command value and the triangular wave carrier have crossed by the previous section, the value is stored when the voltage command value crosses the triangular wave carrier. The voltage command value Vtmp is input to the output Vout (step S20j). Even when passing through any route, the second multi-pulse prevention circuit 2 0 is that to output the output Vout of the second voltage command value V r2 (Step S 2 0 k) 0
- the first current command value and the first current detection value can be sampled using the sampling signal having a cycle shorter than a half cycle of the triangular wave carrier. Therefore, the second multi-pulse prevention device 20 reliably prevents the multi-pulse of the PWM signal for driving the power converter 2 while obtaining a high-speed current response.
- the calculation time of the voltage command value calculator 9 is set to zero. However, if the calculation time is not zero, the section or mode is shifted by the number of samplings corresponding to the calculation time. When the intersection of the voltage command value and the triangular wave carrier is determined in the mode and the mode, the same effect as in the case where the operation time is zero can be obtained.
- FIG. 9 showing a block diagram of a power converter according to another embodiment.
- the same reference numerals as those in FIG. 1 indicate the same or corresponding parts.
- the power converter is controlled by the second PWM signal that suppresses the inversion of the first PWM signal that compares the voltage command value Vr with the triangular carrier Vc. Since the second PWM signal is driven, the second PWM signal deviates from the command of the voltage command value Vr by an amount corresponding to the suppression of the multi-pulse of the first PWM signal.
- the power converter is operated faithfully to the voltage command value Vr while suppressing the number of pulses.
- the voltage error compensator 21 becomes the first PWM signal which is the output signal P-in of the comparator 11 and the output signal P_0Ut of the multipulse preventing device 12
- the difference ⁇ P (t) between the pulse width of the second PWM signal and the second PWM signal is calculated, and the second!
- the power converter 2 is driven by outputting a third PWM signal P 0 obtained by adding the difference ⁇ P (t) to the pulse width of the M signal.
- the multipulse prevention device 12 outputs a pulse serving as a second PWM signal in order to suppress a change after the inversion of the first PWM signal (FIG. 8 (b)).
- the difference between the pulse widths of the first PWM signal and the second PWM signal is ⁇ P (t), that is, the pulse width ta obtained by changing the first PWM signal by the multipulse prevention device 12 (the eighth pulse).
- ⁇ P (t) that is, the pulse width ta obtained by changing the first PWM signal by the multipulse prevention device 12 (the eighth pulse).
- the integrated value of the difference ⁇ P (t) is the integrated value of the error (Fig. 8 (d)).
- the high-frequency clock signal must be counted up while the pulse Pa is occurring. Obtained by
- the pulse width after one cycle can be increased by the changed pulse width.
- This is the operation of the voltage error compensator 21 and shows its output (Fig. 8 (). From the comparison between the first PWM signal and the third PWM signal, changed by the multipulse prevention device 12) The pulse width after one cycle increases by the determined pulse width, and the total pulse width, that is, the average value of the output voltage of power converter 2 is maintained.
- step S 21 a It is determined whether multi-pulse generation has occurred (step S 21 a), and whether the multi-pulse prevention device output acts on the side that increases or decreases (step S 21 b), and the error Count according to the judgment value as the count Vdrp (Steps S21c, 21d If there is a change in the output P_out of the multipulse prevention device 12), determine whether to pay out the error count Vdrp. (Step S21e, 21f) In step S21e, if the error count amount is negative when the rising edge of P_out is detected, the correction output P—out 'is held at L, and the count amount is reduced.
- step S2 1g Addition (step S2 1g), iflg is turned on to store the edge state, and if the error count amount is positive when the falling edge of Pout is detected in step S2 1f, the correction is made
- the output P_out ' is held at H, the count amount is added, and the edge state is To turn the dflg to ⁇ by (Step S 2 1 h) 0 step the error count amount at S 2 1 j is zero iflg and dflg is cleared (Step S 2 1 k) c embodiment
- the multi-pulse prevention device 12 reliably prevents the multi-pulse of the PWM signal, and can compensate for the voltage error accompanying the prevention of the multi-pulse, thereby achieving a high-speed current response. What you get. Example 4.
- FIG. 10 showing a block diagram of a power converter.
- those denoted by the same reference numerals as those in FIG. 6 indicate the same or corresponding parts, and a description thereof will be omitted.
- the intersection between the triangular wave carrier Vc and the first voltage command value Vrl is detected by the intersection detecting means, and based on the detection, the intersection with the triangular wave carrier again within the first cycle.
- the second voltage command value Vr2 and the triangular wave carrier Vc are compared with the voltage command value suppression means for generating the second voltage command value Vr2 in which the change of the first voltage command value Vrl is suppressed so as not to cause the change.
- the power converter 2 was driven by the first PWM signal.
- the second voltage command value Vr2 is changed by the voltage command deviated from the original voltage command (first voltage command value Vrl) only by the amount that the change in the first voltage command value Vrl is suppressed. Had driven two.
- the present embodiment operates the power converter 2 faithfully with the voltage command value Vr while suppressing the multi-pulse generation.
- the second voltage error compensator 22 is a voltage command value calculator.
- the voltage value changed by the multi-pulse prevention device 20 that is, the output voltage error of the voltage converter 2 is integrated.
- the voltage error is compensated by adding the voltage value changed by the multipulse prevention device 20 to the voltage command value generated after the next half cycle of the triangular wave carrier.
- the operation of the second voltage error compensator 22 in the power converter configured as described above will be described with reference to FIG.
- the comparator 11 when the first voltage command value V rl (shown by a dotted chain line) generated from the voltage command value calculator 9 is directly input to the comparator 11, the comparator 11 The first PWM signal is generated by comparing the carrier Vc with the first voltage command value Vrl. In the first PWM signal, the triangular wave carrier Vc intersects with the first voltage command value Vi'l, so that the pulse Pa is generated, resulting in a multi-pulse generation (FIG. 11 (a)). .
- the multi-pulse prevention device 20 generates a first PWM signal in which a change after the first inversion is suppressed in the first PWM signal (FIG. 11 (b)).
- the difference between the first PWM signal and the second PWM signal is the pulse width (Fig. 11 (c)).
- This pulse width is the pulse width changed from the first PWM signal to the second PWM signal by the multi-pulse prevention device 20.
- the integrated value of the pulse width is the integrated value of the error (FIG. 11 (d)), and the integrated value is the difference between the first PWM signal and the second PWM signal as described above.
- the next pulse width can be increased by the pulse width changed by the multi-pulse prevention device 20. This is the operation of the second voltage error compensator 22. From the comparison between (a) and (e), the next pulse width increases by the pulse width changed by the multi-pulse prevention device 20. Therefore, the sum of the pulse widths, that is, the average value of the output voltage of the power converter 2 is maintained.
- the operation of the second voltage error compensator 22 and the second multi-pulse preventing device 20 will be described with reference to the flowchart of FIG.
- the operation steps performed by the voltage error compensator 22 are denoted by reference numeral S 22
- the operation steps performed by the second multi-pulse prevention unit 20 are denoted by reference numeral S 20.
- the same reference numerals as in Fig. 8 indicate the same or equivalent parts as in Fig. 8, and the mode and section The definition of the section is the same as in Figure 7.
- the voltage error compensator 22 reads the voltage command value Vrl (step S20a), and determines whether or not the half cycle of the new triangular wave carrier has been reached (step S20b). When the half cycle of the new triangular wave carrier is reached, the flag flg that stores the intersection of the voltage command value Vrl and the triangular wave carrier Vc is cleared (step S20c), and the half of the previous triangular wave carrier is cleared. The integrated value Verrsum of the error calculated in the cycle is saved in Vofst, and Verrsum is set to zero in order to integrate the error in the half cycle of the current triangular wave carrier (step S22a).
- step S22b The integrated value Vofst of the error calculated in the half cycle of the previous triangular wave carrier is added to Vrl (step S22b).
- the flag flg is determined (step S22d). If the voltage command value and the triangular wave carrier do not intersect before the previous section, the intersection determination of the voltage command value and the triangular wave carrier after step S20e is performed. Do. The determination of the intersection between the voltage command value and the triangular wave carrier is the same as in FIG. In the determination of flg in step 20d, if the voltage command value and the triangular wave carrier intersect before the previous section, the mode is determined (step S22c).
- step S22d or S22e the error voltage Verr corresponding to mode 1 or mode 2 is calculated, respectively.
- the error voltage Verr calculated in step S22d or S22e has a maximum value and a minimum value. Clamp.
- the error voltage thus obtained in each section is added to the integrated value Verrsum of the error in the half cycle of the triangular wave carrier at 22p.
- the second multipulse prevention device 20 reliably prevents the multipulse of the PWM signal from occurring. In addition, it is possible to compensate for the voltage error accompanying the prevention of multi-pulse, and to obtain a high-speed current response.
- FIG. 13 showing a block diagram of a power converter.
- the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and a description thereof will be omitted.
- the power conversion device 1 selects one of a first PWM signal serving as an output of the comparator 11 and a second PWM signal serving as an output of the multipulse preventing device 12.
- a switch 23 as a current comparing means for outputting, a second comparator 24 for outputting a first switching command signal to the switch 23, a second current command value for switching the switch 23, and a second current command value.
- a switching reference generator 25 for generating a reference current value ⁇ ir of the difference ⁇ i from the current detection value of No. 2.
- the power conversion device changes the second (first) current detection value with a delay to the second (first) current value.
- the difference ⁇ i between the second current command value and the second current detection value increases, and the voltage command value calculator 9 generates a large voltage command value and quickly converts the current detection value to the current command value. Try to get closer.
- the multi-pulse preventing device 12 when multi-pulsing occurs in the first PWM signal, the multi-pulse preventing device 12 generates the second PWM signal to prevent the multi-pulsing. Therefore, the power converter 2 does not operate according to the voltage command value of the voltage command value calculator 9, which causes a delay in following the current command value. Therefore, if the difference ⁇ i between the second current command value and the second current detection value is larger than the reference current value ⁇ ir, a switching signal is generated from the comparator 24 and the second Switching from the PWMW signal to the first PWM, that is, switching from the output of the comparator 11 to the output of the multipulse prevention device 12 and inputting it to the power converter 2, the response to the current command value is obtained. It will improve. In general, the period in which the difference ⁇ i is large is limited in time, so that the loss increase of the power converter 2 is also within an allowable range.
- the loss of the power converter 2 is reduced.
- there is no problem there is an effect that a higher-speed response can be obtained without using the multipulse prevention device 12.
- Embodiment 6 may be applied to the embodiment 3 (FIG. 7) so that the switch 23 can select the first PWM signal or the second PWM signal.
- Embodiment 6 may be applied to the embodiment 3 (FIG. 7) so that the switch 23 can select the first PWM signal or the second PWM signal.
- FIG. 15 showing a block diagram of a power converter.
- the same reference numerals as those in FIG. 13 denote the same or corresponding parts, and a description thereof will be omitted.
- the power converter 1 selects one of the first PWM signal output from the comparator 11 and the second PWM signal output from the multipulse preventing device 12 and outputs the selected signal.
- the second comparator 24 as a means for comparing the number of times the switching command signal is output to the switch 23, and the reference number of times of switching of the power switching element in consideration of the temperature of the power converter 2, etc.
- the generated switching reference generator 25 and the number of switching times of the power switching element of the power converter 2 are, for example, the number of times that the rising or falling number of pulses input to the power converter are counted within a certain time. It is equipped with a number-of-times detector 26 to output.
- Switching Reference generator 25 Number of occurrences of reference and switching frequency detector 2 6
- the second comparator 24 compares the number of times that the output is output from the comparator with the detected value. If the detected number of times is larger than the reference number of times, the first switching signal is output by the switch 24. Is generated and the switch 23 is operated to switch from the first PWM signal to the second PWM signal, thereby reducing the number of times of switching of the power switching element, thereby suppressing the temperature rise of the power converter 2. I do.
- the second switching signal is generated from the switch 23 and the second PWM signal is output from the second PWM signal. High-speed response is realized by switching to the first PWM signal.
- a hysteresis comparator for the second comparator 24 as shown in FIG. 16 because the change width of the number of switching can be controlled by the hysteresis width.
- the first PWM signal or the second PWM signal can be selected by the switch 23. If there is no problem with loss, inputting the first PWM signal to the power converter 2 has the effect of obtaining a faster response.
- Embodiment 3 FIG. 7
- the first PWM signal or the second PWM signal may be selectable. Embodiment 7.
- FIG. 17 Another embodiment of the present invention will be described with reference to the block diagram of the power converter shown in FIG. 17, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and a description thereof will be omitted.
- the power converter 1 selects one of the first PWM signal output from the comparator 11 and the second PWM signal output from the multipulse preventing device 12.
- Switch 23, which outputs the switching command signal, the second comparator 24, which is a temperature comparison means that outputs a switching command signal to the switch 23, and the switch 23 A switching reference generator 25 for generating a reference temperature value of the power converter 2, and a temperature detector 27 for detecting the temperature of the power converter 2.
- the temperature of power converter 2 usually fluctuates depending on load 3, operating frequency, and the presence or absence of multi-pulse generation.For example, as shown in Fig. 18, it changes over time. I do.
- the second comparator 24 compares the temperature reference value generated by the switching reference generator 25 with the temperature detection value of the power converter 2 detected by the temperature detector 27 to obtain the temperature reference value. If the temperature detection value is higher than the temperature detection value, the output of the multipulse prevention device 12 is selected by the switch 23 and the power converter 2 is driven by the second PWM signal. The temperature rise of the power converter 2.
- the power converter 2 has a temperature margin, and the switch 23 selects the output of the comparator 11 to realize a high-speed response.
- the temperature change width can be controlled by the hysteresis width.
- the first PWM signal or the second PWM signal is output by the switch 23 based on the comparison between the detected temperature value of the power converter 2 and the temperature reference value. Since the WM signal can be selected, if there is no problem with the loss of the power converter, the use of the multi-pulse prevention device 12 has the effect of obtaining an even faster response.
- the above embodiment may be applied to the embodiment 3 (FIG. 7) so that the switch 23 can select the first PWM signal or the second PWM signal.
- Embodiments 5 to 7 can be applied to Embodiment 2 or Embodiment 4. That is, in Embodiments 5 to 7, the first PWM signal and the second PWM signal are switched by the switch 2.
- Example 2 Figure 4
- Example 4 Figure 10
- the first voltage command value V rl which is the output of the voltage command value calculator 9
- the second voltage command value V r2 which is the output of the multipulse prevention device 20 are switched by the switch 23. This has the same effect as described above.
- the power conversion device according to the present invention is suitable for use in inverters.
Description
Claims
Priority Applications (7)
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KR1020037010020A KR100569798B1 (ko) | 2002-07-18 | 2002-07-18 | 전력변환장치 |
JP2003533389A JP4168935B2 (ja) | 2002-07-18 | 2002-07-18 | 電力変換装置 |
CNB028042328A CN100405716C (zh) | 2002-07-18 | 2002-07-18 | 功率变换装置 |
PCT/JP2002/007316 WO2004010570A1 (ja) | 2002-07-18 | 2002-07-18 | 電力変換装置 |
DE10297126T DE10297126T5 (de) | 2002-07-18 | 2002-07-18 | Leistungswandler |
US10/470,484 US6903948B2 (en) | 2002-07-18 | 2002-07-18 | Power converter employing pulse width modulation control |
TW091117106A TW571493B (en) | 2002-07-18 | 2002-07-31 | Power conversion device |
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PCT/JP2002/007316 WO2004010570A1 (ja) | 2002-07-18 | 2002-07-18 | 電力変換装置 |
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PCT/JP2002/007316 WO2004010570A1 (ja) | 2002-07-18 | 2002-07-18 | 電力変換装置 |
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US (1) | US6903948B2 (ja) |
JP (1) | JP4168935B2 (ja) |
KR (1) | KR100569798B1 (ja) |
CN (1) | CN100405716C (ja) |
DE (1) | DE10297126T5 (ja) |
TW (1) | TW571493B (ja) |
WO (1) | WO2004010570A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008014289A1 (de) | 2008-03-11 | 2009-09-17 | Coty Prestige Lancaster Group Gmbh | Kosmetikum mit Anti-Alterungswirkung |
JP2014138486A (ja) * | 2013-01-17 | 2014-07-28 | Toyota Motor Corp | コンバータ制御装置 |
Families Citing this family (16)
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TWI312223B (en) * | 2003-11-14 | 2009-07-11 | Beyond Innovation Tech Co Ltd | A pulse width modulation control circuit and the loading system of its application |
US7049778B2 (en) * | 2004-02-09 | 2006-05-23 | Nippon Yusoki Co., Ltd. | Inverter control apparatus and inverter control method |
US7345464B2 (en) * | 2004-09-16 | 2008-03-18 | Semiconductor Components Industries, L.L.C. | PWM power supply controller having multiple PWM signal assertions and method therefor |
CN100466434C (zh) * | 2005-02-10 | 2009-03-04 | 英特赛尔美国股份有限公司 | 具有利用双斜坡的双边沿调制的脉冲宽度调制控制器 |
CN101401288B (zh) * | 2006-03-09 | 2012-05-30 | 新电元工业株式会社 | 一种电力转换器 |
ATE551770T1 (de) * | 2007-04-20 | 2012-04-15 | Mitsubishi Electric Corp | Umrichter-steuerung |
GB0710057D0 (en) * | 2007-05-25 | 2007-07-04 | Splashpower | Power system |
US7863836B2 (en) * | 2008-06-09 | 2011-01-04 | Supertex, Inc. | Control circuit and method for regulating average inductor current in a switching converter |
EP2518886B1 (en) * | 2009-12-24 | 2021-11-03 | Mitsubishi Electric Corporation | Power conversion apparatus and driving method for power conversion apparatus |
JP5909622B2 (ja) * | 2010-03-11 | 2016-04-27 | パナソニックIpマネジメント株式会社 | モータ駆動装置 |
US9294009B2 (en) * | 2011-03-24 | 2016-03-22 | Daihen Corporation | Inverter apparatus including control circuit employing two-phase modulation control, and interconnection inverter system including the inverter apparatus |
CN103023464B (zh) * | 2012-08-08 | 2016-12-21 | 武汉大学 | 一种数字化三角波比较法 |
US9634579B2 (en) * | 2015-04-03 | 2017-04-25 | Hamilton Sundstrand Corporation | Systems and methods for controlling inverters |
KR20180072313A (ko) * | 2016-12-21 | 2018-06-29 | 에스케이하이닉스 주식회사 | 커패시턴스 센싱 회로 |
JP7024296B2 (ja) | 2017-10-02 | 2022-02-24 | セイコーエプソン株式会社 | 電源制御回路、携帯型情報処理装置、および電源制御方法 |
CN113820612B (zh) * | 2020-06-19 | 2022-12-27 | 大唐恩智浦半导体有限公司 | 误差补偿电路和测量电池阻抗的集成电路 |
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JPH1042569A (ja) * | 1996-07-23 | 1998-02-13 | Hitachi Ltd | パルス幅変調変換器の出力制御装置 |
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US4689543A (en) * | 1985-12-27 | 1987-08-25 | Sundstrand Corporation | Frequency and voltage control for inverter powered AC motor |
US4891744A (en) * | 1987-11-20 | 1990-01-02 | Mitsubishi Denki Kaubshiki Kaisha | Power converter control circuit |
JP3326479B2 (ja) * | 1995-11-29 | 2002-09-24 | 株式会社日立製作所 | 電力変換器の制御システム |
JP3497995B2 (ja) * | 1998-10-01 | 2004-02-16 | 富士電機機器制御株式会社 | Pwm電力変換装置 |
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2002
- 2002-07-18 CN CNB028042328A patent/CN100405716C/zh not_active Expired - Lifetime
- 2002-07-18 KR KR1020037010020A patent/KR100569798B1/ko active IP Right Grant
- 2002-07-18 JP JP2003533389A patent/JP4168935B2/ja not_active Expired - Lifetime
- 2002-07-18 DE DE10297126T patent/DE10297126T5/de not_active Withdrawn
- 2002-07-18 WO PCT/JP2002/007316 patent/WO2004010570A1/ja active IP Right Grant
- 2002-07-18 US US10/470,484 patent/US6903948B2/en not_active Expired - Lifetime
- 2002-07-31 TW TW091117106A patent/TW571493B/zh not_active IP Right Cessation
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JPH1042569A (ja) * | 1996-07-23 | 1998-02-13 | Hitachi Ltd | パルス幅変調変換器の出力制御装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008014289A1 (de) | 2008-03-11 | 2009-09-17 | Coty Prestige Lancaster Group Gmbh | Kosmetikum mit Anti-Alterungswirkung |
JP2014138486A (ja) * | 2013-01-17 | 2014-07-28 | Toyota Motor Corp | コンバータ制御装置 |
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US6903948B2 (en) | 2005-06-07 |
KR20050009942A (ko) | 2005-01-26 |
DE10297126T5 (de) | 2004-07-29 |
JP4168935B2 (ja) | 2008-10-22 |
CN100405716C (zh) | 2008-07-23 |
TW571493B (en) | 2004-01-11 |
CN1529931A (zh) | 2004-09-15 |
JPWO2004010570A1 (ja) | 2005-11-17 |
KR100569798B1 (ko) | 2006-04-10 |
US20040232897A1 (en) | 2004-11-25 |
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