WO2014178673A1 - Procédé de modulation d'impulsions en largeur permettant de commander un convertisseur de puissance - Google Patents

Procédé de modulation d'impulsions en largeur permettant de commander un convertisseur de puissance Download PDF

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Publication number
WO2014178673A1
WO2014178673A1 PCT/KR2014/003901 KR2014003901W WO2014178673A1 WO 2014178673 A1 WO2014178673 A1 WO 2014178673A1 KR 2014003901 W KR2014003901 W KR 2014003901W WO 2014178673 A1 WO2014178673 A1 WO 2014178673A1
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Prior art keywords
signal
control signal
width modulation
modulation method
control
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PCT/KR2014/003901
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English (en)
Korean (ko)
Inventor
박인규
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Park In Gyu
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Priority claimed from KR1020130049853A external-priority patent/KR20140131040A/ko
Priority claimed from KR20130049852A external-priority patent/KR20140131039A/ko
Application filed by Park In Gyu filed Critical Park In Gyu
Publication of WO2014178673A1 publication Critical patent/WO2014178673A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/08—Duration or width modulation ; Duty cycle modulation

Definitions

  • the present invention relates to a fill width modulation method for controlling a power converter, and more particularly, a DC-DC converter or a switching regulator such as a step-down converter, a step-up converter, a step-down converter, and the like; DC switch mode power supplies or floor electric devices such as half-bridge converters, all-bridge converters, push-pull converters, forward converters, and flyback converters; Single-phase AC-DC converters such as power factor correcting rectifiers and fill width modulation converters; Single-phase DC-AC converters such as half-bridge inverters, all-bridge inverters, push-pull inverters, fill width modulated power amplifiers, or motor drivers; Three-phase bridge inverter or three-phase electric motor driver; Three-phase bridge converter; Polyphase-bridge inverters or polyphase motor drivers; It relates to a fill width modulation method for the control of almost all switched (or stationary) power converters, including polyphase-to-bridge converters.
  • a DC-DC converter or a switching regulator such
  • Power conversion is to convert the power supplied to the required power. This power conversion is necessary in almost all cases of power use, from small powers of several W or less to large powers of several MW or more.
  • Switching power converters use a switch which is a lossless control element as a means to achieve high efficiency. Lossless switches are ideal, and some real state switching and switching losses occur in real semiconductor switching devices such as diodes and transistors.
  • a switch is a device that is not capable of continuous control but only on-off control (or switching).
  • the power converters can thus be selectively controlled to only a limited level of voltage or current output depending on the respective circuit configuration and switching of the switches.
  • DC-DC converters or switching regulators such as step-down converters, step-up transformers, step-down converters, and the like
  • DC switch mode power supplies such as half-bridge converters, all-bridge converters, push-pull converters, forward converters, and flyback converters
  • Power factor correcting rectifier Single-phase DC-to-AC converters such as half-bridge inverters, push-pull inverters, field width modulated power amplifiers, or motor drivers, etc. Belongs to level translator. ,
  • Multi-level converters have better output quality than two-level converters, but the circuit configuration is more complex.
  • Widely used full bridge inverters and neutral point clamp (NPC) transducers are the typical multi-level transducers as three-level transducers.
  • Multi-phase transducers can be configured by connecting two-level transducers or multi-level transducers in multiple phases.
  • Three-phase bridge converter is a representative polyphase converter.
  • Full-bridge inverters can also be seen as two-level two-phase converters.
  • DC-DC interleaved converters are also multiphase converters.
  • Polyphase converters are mainly used to drive polyphase motors or generators. Control of power converters ''
  • Linear feedback control is a control in which an error signal obtained by subtracting an output signal from a reference output signal is an input signal through a linear compensator.
  • linear compensators include proportional compensators, proportional-integral compensators, and proportional-integral- derivative compensators. Linear feedback control has the advantage of being easy to implement and guaranteeing results.
  • an increase in the order of the system is a disadvantage. Basically, it has a negative effect on the transient response rate.
  • the larger the integral gain the less the negative effect of the transient response rate. If the dominant poles of the system transfer function are complex pairs, increasing the integral gain does not speed up transient transients and increases the frequency of vibration.
  • the derivative gain can be used for the purpose of speeding up the transient response when the dominant pole of the system transfer function is a complex pair.
  • compensators in the frequency domain. The accuracy at any frequency is proportional to the gain at that frequency above compensation. In general, the larger the gain of the compensator, the higher the asymmetry for variations in the various variables and parameters of the system. The input and output circuits of the power converter vary.
  • a series inductor (or equivalent inductance) is usually connected to the output voltage terminals.
  • a current source converter is a pair of voltage source converters.
  • the control outputs also vary.
  • the voltage of the filter capacitor may be the control output
  • the motor speed may be the control output.
  • the performance of the control methods including the current control of the series inductor in the minor loop is excellent.
  • a so-called ripple-based voltage control method that uses the equivalent series resistance of the filter capacitor has also attracted attention.
  • the fill width modulation methods can usually be applied in common. Fill width modulation method
  • Power converters require a fill width modulation method because they are not capable of continuous control and can be selectively controlled to only a limited level.
  • the field width modulation method for controlling the power converter receives a reference signal (reference control signal) as an input and outputs a control signal (signal for controlling the power converter) as an output.
  • the fill width modulation method is based on a two-level fill width modulation method and is extended to a multi-level fill width modulation method such as three-level. It also extends to the polyphase fill width modulation method.
  • the pillar width modulation methods the carrier pillar width modulation method, the hysteresis pillar width modulation method, and the fixed frequency pillar width modulation method are classical, but are still widely used. Carrier Field Width Modulation Method
  • the main feature of the carrier fill width modulation method is to switch the control signal by comparing the reference signal with a high frequency carrier signal. Then, the switching frequency of the control signal is equal to the frequency of the carrier signal.
  • a carrier signal a triangular wave or a sawtooth wave is mainly used.
  • the carrier fill width modulation method can be used in both open loop control and closed loop control.
  • the carrier spread width modulation method has been used since the early days of power conversion techniques because it could be implemented with analog circuitry. Since the development of digital technology, sampling field width modulation methods of switching periods have emerged.
  • the spatial vector fill width modulation method of three-phase DC-AC power converter is a representative example.
  • Real-time comparison carrier field width modulation method is based on analog implementation, but switching the sampling period Much shorter than this can be implemented digitally.
  • carrier fill width modulation to closed loop current control, such as direct-to-dc converters, switching regulators, or power factor corrected rectifiers, is commonly referred to as average current mode control.
  • Application to closed loop control of DC-AC inverters or AC-DC converters is often referred to as the suboscillation method or the ramp comparison method.
  • the main advantage of the carrier fill width modulation method is that the switching frequency can be kept constant.
  • the biggest disadvantage is that there is a limit to the amount of gain of the compensator. This is because of the multiple crossing problem that occurs when the slope of the reference signal is greater than the slope of the carrier signal (see Non-Patent Document 4-7).
  • the slope of the reference signal becomes large in proportion to the proportional gain of the compensator or the gain in the high frequency region, thus limiting the magnitude of the gain.
  • the limit of this gain is often less than the desired or required value.
  • Another disadvantage is the inability to increase the asymmetry of variations in the parameters and parameters of the system.
  • the hysteresis field width modulation method is also called an allowable band, bang-bang, or sliding mode field width modulation method.
  • Hysteresis The fill width modulation method is characterized in that the control signal is switched by comparing the hysteresis of the reference signal with a certain allowable band.
  • the hysteresis field width modulation method can be used only in closed loop control.
  • the hysteresis field width modulation method has excellent characteristics in terms of transient quiescent speed, steady state error, and adaptability.
  • the problem is that the switching frequency is not constant and varies greatly with the variation of various variables and parameters of the system. If the switching frequency is not constant, the switching power loss in the semiconductor switching element is not constant, which makes the heat dissipation and protection of the semiconductor switching element difficult. Difficulties also arise with filters and electro-magnetic compatibility (EMC) to suppress switching ripple.
  • EMC electro-magnetic compatibility
  • Another disadvantage is that it does not work properly when discontinuous current mode occurs. And because of the inability to synchronize, the performance is poor in a multiphase AC converter, and the harmonic neutralization in a multiphase DC interleaved converter Not applicable is also a big disadvantage.
  • Another fill width modulation method for closed loop control is a fixed (or constant) frequency pulse width modulation method. Also called peak current mode control.
  • the control signal is switched by a hysteresis comparison between a reference signal and a zero signal, and the control signal is switched at a certain period of time.
  • the advantage is that the switching frequency is constant, synchronized, and operates in discontinuous current mode. Basically, however, there is an offset error of half the switching ripple.
  • the duty ratio is greater than 0.5, it is unstable and low harmonics are generated.
  • the addition of a compensating gradient wave stabilizes even when the duty ratio is greater than 0.5. However, the larger the slope, the larger the offset error tracking error and the steady state error.
  • the fixed frequency field width modulation method with the compensation slope wave is similar to the closed loop Lobni carrier field width modulation method.
  • the gradient of the compensating gradient wave acts as the inverse of the proportional gain. The only difference is that hysteresis comparison is used.
  • the proportional gain can be made larger because there is no multi-crossing problem, but there is a disadvantage that a large offset error occurs-allowable band control hysteresis field width modulation method
  • the allowable band control hysteresis field width modulation methods described in Patent Document 1, Non-Patent Document 1, and Non-Patent Document 2 are notable. These methods provide a means to detect the switching frequency, and subtract the switching frequency signal detected from the reference switching frequency signal and adjust the allowable band signal through a compensator.
  • Tolerant band controlled hysteresis field width modulation methods have the advantage that the switching frequency is regulated while maintaining the superior characteristics of the hysteresis field width modulation method.
  • it is not very easy to implement and the switching performance of the switching frequency is not satisfactory.
  • detecting the switching frequency is not easy, and because the switching frequency and the allowable band are inversely related in nature.
  • Non-Patent Document 1 KANG, B. J .; LIAW, C. M. 'Robust hysteresis current-controlled PWM scheme with fixed switching frequency', IEE Proc. Electr. Power Appl., Vol. 148, No. 6, 2001, p 503-512.
  • Non-Patent Document 2 HUERTA, SC; ALOU, P .; OLIVER, JA; GARCIA, O .; COBOS, JA; ABOU-ALFOTOUH, AM 'Nonlinear control for dc— dc converters based on hysteresis of the Cout current with a frequency loop to operate at constant frequency ', IEEE Transactions on Industrial Electronics. Vol. 58, No. 3, 2011, p 1036-1043.
  • Non-Patent Document 3 MOHAN, N .; UNDELAND, T. M .; ROBBINS, W. P. Power Electronics: Converters, Applications, and Design, John Wiley & Sons, 1989, ISBN 0-471-50537-4.
  • Non-Patent Document 4 DIXON, L. 'Average current mode control of switching power supplies', Unitrode application note, 1990.
  • Non-Patent Document 5 BROD, D. M .; NOVOTNY, D. W. 'Current control of VSI-PWM Inverter', IEEE Transactions on Industry Applications. Vol. 21, No. 4, 1985, p 562-570.
  • Non-Patent Document 6 HOLTZ, J. 'Pulsewidth modulation for electronic power conversion', Proceedings of the IEEE. Vol. 82, No. 8, 1994, p 1194-1214.
  • Non-Patent Document 7 KAZMIERKOWSKI, M. P .; MALESANI, L.'Current control techniques for three-phase voltage-source PWM converters; a survey ', IEEE Transactions on Industrial Electronics. Vol. 45, No. 5, 1998, p 691 703.
  • Non-Patent Document 8 YU, F .; LEE, FC; MATTAVELLI, P. ⁇ small signal model for average current mode control based on describing function approach ', in IEEE Energy Conversion Congress and Exposition Conference Record, 2011, p 405- 412.
  • Non-Patent Document 9 REDL, R .; SUN, J, 'Ripple-based control of switching regulators' an overview', IEEE Transactions on Power Electronics. Vol. 24, No. 12, 2009, p 2669-2680.
  • the main object of the present invention is a prior art allowable band control hysteresis ' pill width modulation method To improve or overcome the shortcomings of the law
  • the first object of the present invention is to maintain the excellent characteristics of the hysteresis field width modulation method, switching frequency is easy to implement, easy to implement, excellent switching performance of the switching frequency, 2-level, multi-level, and It is to provide a pulse width modulation method that can be applied to a polyphase power converter.
  • the second object of the present invention is to maintain the excellent characteristics of the hysteresis pulse width modulation method, the switching frequency is regulated, easy to implement, the switching performance is excellent, the synchronization is possible, even in the discontinuous current mode It is intended to provide a fill width modulation method that operates and can be used in open loop control as well as closed loop control and can be applied to two-level, multi-level, and multiphase power converters.
  • the present invention is largely two kinds.
  • the first invention achieves the first object, and the second invention achieves the second object.
  • MATLAB which is a computer programming language
  • the symbols in parentheses in the description of the feature are variables or values in the MATLAB description.
  • a control method for a power converter comprising: a field width modulation method of receiving a reference signal and outputting a control signal to an output;
  • the pulls width modulation method comprising a.
  • a fold width modulation method for controlling a two-level power converter that can be selectively controlled at two levels, the control signal s being output to a reference signal vr as an input;
  • Field width modulation method comprising a.
  • a spread that receives a reference signal (vr) as an input and outputs a control signal (s) and a level control signal (ss) as outputs.
  • vr reference signal
  • s control signal
  • ss level control signal
  • control signal (s) When the control signal (s) is at a low level (0) and the reference signal (vr) is greater than the allowable band signal (vb), changing the additive control signal (s) to a high level (1);
  • Field width modulation method comprising a.
  • the field width modulation method for controlling a multi-phase power converter in which the number of phases (N) is two or more, receiving a reference signal (vr) as an input and outputting a control signal (s) as an output for each phase (m). ; Providing a permit band signal vb and a timer signal vt for each phase; Setting the reference switching period Ts and the integral gain Ki;
  • control signal s is at a high level (1) and the reference signal
  • control signal s is at a low level (0) and the reference signal
  • Field width modulation method comprising a.
  • the control signal s is at a high level (1) and the reference signal when (vr) is less than the negative value of the allowed band signal (vb), changing the control signal (s) to a low level (0) and increasing the switching number signal (ns) by one;
  • control signal s For each phase m, when the control signal s is at a low level (0) and the reference signal vr is greater than the allowable band signal vb, the control signal s is set to a high level (1). ) And increasing the switching number signal ns by one; And
  • the integral gain Ki is multiplied by two times the reference switching period Ts minus the timer signal vt. Adding to the allowed band signal (vb), making the timer signal (vt) zero, and making the switching number signal (ns) zero;
  • Field width modulation method comprising a.
  • a control method for a power converter comprising: a field width modulation method of receiving a reference signal as an input and outputting a control signal to an output;
  • Field width modulation method comprising a.
  • Features of a Two-Level Fill Width Modulation Method Embodiment of the Second Invention The features of the 2 ⁇ level spread width modulation method embodiment of the second invention may be described as follows.
  • a fold width modulation method for controlling a two-level power converter that can be selectively controlled at two levels, the control signal s being output to a reference signal vr as an input;
  • control signal (s) When the control signal s is at a high level (1) and the reference signal (vr) is smaller than the negative value of the carrier band signal (vc), the control signal (s) is changed to a low level (0) and Adding the step value (b) to the carrier band signal (vc); Otherwise, when the control signal s is at a low level (0) and the reference signal vr is greater than the carrier band signal vc, the control signal s is changed to a high level (1), and the Adding the stem value (b) to the carrier band signal (vc);
  • Field width modulation method comprising a.
  • a field receiving a reference signal (vr) as an input and sending a control signal (s) and a level control signal (ss) as outputs
  • vr reference signal
  • s control signal
  • ss level control signal
  • control signal (s) When the control signal s is at a high level (1) and the reference signal (vr) is smaller than the negative value of the carrier band signal (vc), the control signal (s) is changed to a low level (0) and Adding the step value (b) to the carrier band signal (vc); Otherwise, when the control signal s is at a low level (0) and the reference signal vr is greater than the carrier band signal vc, the control signal s is changed to a high level (1), and the Adding the step value (b) to the carrier band signal vc;
  • Field width modulation method comprising a.
  • each phase For control of a multi-phase power converter in which the number of phases (N) is two or more, each phase
  • control signal s For each phase m, when the control signal s is at a high level (1) and the reference signal vr is smaller than the negative value of the carrier band signal vc, the control signal s is Change to low level (0) and add the step value (b) to the carrier band signal (vc); Otherwise, when the control signal s is at a low level (0) and the reference signal vr is greater than the carrier band signal vc, the control signal s is changed to a high level (1), Adding the step value (b) to the carrier band signal (vc);
  • Field width modulation method comprising a.
  • the auxiliary control signal sa is at high level (1).
  • the control signal (s) is at high level (1) and the reference signal (vr) is the carrier band signal (vc). Negative When smaller than the value, changes the control signal s to a low level (0); Otherwise, when the auxiliary control signal sa is low level (0) and the control signal s is low level (0) and the reference signal vr is greater than the carrier bend signal vc, Changing the control signal (s) to a high level (1); And
  • the step value (b) is added to the carrier band signal vc, and the Change auxiliary control signal sa to low level (0);
  • the step value (b) is added to the carrier band signal vc, and the auxiliary Changing the control signal sa to the high level 1;
  • the spread width modulation method comprising a.
  • i i + l / L * (v-R * i-e) * dt;
  • the following is an example of a MATLAB simulation program for the multi-level spread width modulation method of the first invention. Except for the multi-level, it is the same as the two-level fill width modulation method just presented, and shows almost the same characteristics. Running with varying number of levels (NL) and magnitudes of electromotive force (em) will reveal a variety of multi-level behaviors. The presentation of execution results is omitted. clear all; clc; close all
  • the following is an example MATLAB prototype for the 2 ⁇ level pulse width modulation method of the second invention.
  • DC-to-AC conversion the load is inductance (L), resistance (R), and electromotive force (e) o
  • L inductance
  • R resistance
  • e electromotive force
  • 2 is a result of execution when the proportional gain Kp is 50.
  • FIG. 2 shows that the switching frequency is regulated with stabilization of the carrier band signal vc. The same is true even if the initial value of the carrier band signal vc is changed, the inductance L is changed, or the electromotive force e is changed.
  • the second invention unlike the carrier spread width modulation method, has no limit on the size of the proportional gain Kp of the compensator, and therefore, the gain of the compensator can be increased as desired or necessary. Then, compared to the carrier fill width modulation method, an improvement effect can be obtained in almost all aspects such as transient response speed, following error and steady state error, redness for system variation, and burden of precision tuning. In addition, since there is no limit to the gain of the compensator, there is a large margin in the gain value, thereby improving the reliability, versatility, and convenience. However, if the proportional gain Kp is increased, the allowable band signal vb becomes flat and the transient time for stabilizing the switching period becomes long.
  • the second invention can employ other compensators such as proportional-integral compensators, but in most cases the proportional compensators show good performance. clear all; clc; close all
  • i i + l / L * (v-R * i-e) * dt;
  • the following is an example of a MATLAB simulation program for checking the operation in the open loop control of the second invention.
  • 4 shows the execution result of the program.
  • the second invention shows the same result as the triangular carrier spread width modulation method in open loop control. clear all; clc; close all
  • the second invention shows the same result as the triangular carrier fill width modulation method when the gain of the compensator is reduced not only in the open loop control but also in the closed loop control. However, in the triangular carrier fill width modulation method, the multi-crossing problem does not occur.
  • the second invention can be seen to extend the slope portion of the triangular carrier fill width modulation method so that no multi-crossing problem occurs regardless of the size of the compensator gain.
  • the second invention is the same as the hysteresis field width modulation method when the gain of the compensator is infinite. Multi-level fill width modulation method simulation program of the second invention
  • i i + l / L * (v-R * i-e) * dt;
  • i i + l / L * (v-R * i-e) * dt;
  • i i + l / L * (v-R * i-e) * dt;
  • two-level two-phase converters are equivalent to three-level converters.
  • a three-level fill width modulation method may be used.
  • FIG. 7 shows the execution result of the program.
  • 7A shows the modulation reference signal (vr) and the carrier signal (vc) of the first phase
  • FIG. 7B shows the DC axis neutral point of the first phase-the reference phase voltage (V)
  • FIG. 7C shows the neutral point of the AC phase of the first phase-the reference phase voltage ( vn)
  • FIG. 7D shows the reference current (ir) and the output current (0) of the first phase
  • FIG. 7E shows the generated torque (T).
  • the multi-phase pillar width modulation method of the second invention not only causes the switching frequency to be regulated, but also is ' synchronized, so that harmonic generation is relatively low. And low speed instant change There is no limit cycle even when tuning is low.
  • the proportional gain Kp is too large, the polyphase may not be synchronized and may operate similar to the hysteresis field width modulation method, or the polyphase may be undesirably synchronized. Therefore, it is necessary to make the proportional gain Kp not too large. Instead, it is desirable to add an integral gain to further reduce the error. clear all; clc; close all
  • Prior allowed band control hysteresis Field width modulation methods are characterized by providing a means for detecting the switching frequency, subtracting the detected switching frequency signal from the reference switching frequency signal and adjusting the allowed band signal through a compensator. While the preceding methods maintain the excellent characteristics of the hysteresis field width modulation method, the switching frequency is legulated, but the implementation is not very easy and the switching performance of the switching frequency is not satisfactory. Essentially, detecting the switching frequency is not easy, and because the switching frequency and the allowable band are inversely related in nature.
  • the first invention feeds back the allowable band with a switching period rather than switching frequency.
  • the main feature is to provide a means for detecting the switching period, and to adjust the allowed band signal by subtracting the switching period signal detected from the reference switching period signal and going through a sampling compensator.
  • the switching period is the inverse of the switching frequency.
  • the switching cycle can be detected accurately every cycle with a simple timer.
  • the switching period and the allowable band are proportional in nature. Therefore, the first invention is based on the preceding methods. Compared to this, it is easy to implement and the regulation performance of switching frequency is satisfactory.
  • the first invention can be applied to two-level, multi-level, and multiphase power converters.
  • the first invention has the disadvantage that synchronization is not possible, does not operate in discrete current mode, and cannot be used in open loop control.
  • the second aspect of the present invention is to reduce the carrier bend signal with a constant phase over time, and to add a constant step value to the carrier band signal when switching the control signal. Adjusting the carrier band signal in this way is very easy to implement. And basically, the second invention has not only the excellent characteristics of the hysteresis field width modulation method but also the excellent characteristics of the carrier field width modulation method. That is, synchronization is possible and can be used for open loop control as well as closed loop control. The second invention works even in discontinuous current mode. And can be applied to two-level, multi-level, and polyphase power converters.
  • the second invention unlike the carrier spread width modulation method, has no limit on the size of the proportional gain of the compensator and thus the gain of the compensator can be increased as desired or necessary. Then, compared with the carrier pulse width modulation method, an improvement effect can be obtained in almost all aspects such as transient quiescent speed, following error and steady state error, redness to system variation, and burden of precision tuning. In addition, since there is no limit to the gain of the compensator, there is a large margin in the gain value, and thus an effect of improving reliability, generality, and convenience can be obtained. (This improvement is particularly beneficial in power management integrated circuits and motor-drive integrated circuits.) However, increasing the proportional gain results in longer transients that flatten the allowable band signal and stabilize the switching cycle. Lose.
  • proportional gain is very large, the transient time is extremely short, and it is rare that the proportional gain needs to be very large.
  • other compensators such as proportional-integral compensators can be employed, but in most cases, proportional compensators show good performance.
  • the second aspect of the invention when the gain of the compensator is reduced, the same results as in the triangular carrier fill width modulation method are obtained. However, in the triangular carrier fill width modulation method, the multi-crossing problem does not occur.
  • the second invention can be seen to extend the slope portion of the triangular carrier fill width modulation method so that no multi-crossing problem occurs regardless of the size of the compensator gain.
  • the second invention is the same as the hysteresis field width modulation method when the gain of the compensator is infinite.
  • the second invention includes a triangular carrier spread width modulation method and a hysteresis field width modulation method at both ends of the compensator gain are one theoretical proof of the superiority of the second invention.
  • ⁇ Brief Description of Drawings ⁇ 1 is a simulation example of the two-level fill width modulation method of the first invention.
  • 2 is a simulation example of the two-level fill width modulation method of the second invention.
  • 3 is a simulation example of the discontinuous current mode of the second invention.
  • 5 is an example simulation for the multi-level fill width modulation method of the second invention.
  • 6 is a simulation example of a two-phase pillar width modulation method of the second invention.
  • 7 is a simulation example of the polyphase fill width modulation method of the second invention.
  • the slope and step values of the carrier band signal may be nonlinear or variable for the purpose of limiting the size of the switching ripple or dispersing the frequency spectrum of the switching ripple.
  • the present inventions can be implemented and used in an analog or digital manner.
  • the present inventions can be implemented and used in discrete circuits or integrated circuits.
  • the present invention may be used in a control integrated circuit, a power management integrated circuit, or a motor driving integrated circuit before the fill width modulation.
  • the present invention can be used in all power converters or devices including the power converter.

Abstract

La présente invention concerne un procédé de modulation d'impulsions en largeur permettant de commander pratiquement tous les types de convertisseurs de puissance à commutation. Le premier objectif de la présente invention est de créer un procédé de modulation d'impulsions en largeur pouvant réguler une fréquence de commutation, tout en conservant d'excellentes caractéristiques d'un procédé de modulation d'impulsion en largeur à hystérèse, et pouvant être mis en oeuvre facilement, présentant une excellente efficacité de régulation de fréquence de commutation, et applicable à des convertisseurs de puissance à 2 niveaux, à plusieurs niveaux et à plusieurs phases. Le deuxième objectif de la présente invention est de créer un procédé de modulation d'impulsions en largeur apte à une synchronisation et pouvant fonctionner même dans un mode de courant discontinu et pouvant être utilisé pour une commande en boucle ouverte, ainsi qu'une commande en boucle fermée, en plus du premier objectif. La première invention est principalement caractérisée en ce qu'elle consiste à fournir un moyen servant à détecter une période de commutation et à ajuster un signal de bande admissible par soustraction du signal périodique de commutation détecté d'un signal périodique de commutation de référence et à faire passer le reste à travers un compensateur d'échantillon. La deuxième invention est principalement caractérisée par la réduction d'un signal de bande porteuse à une pente constante dans le temps et par l'ajout d'une valeur de pas spécifique au signal de bande porteuse lors de la commutation d'un signal de commande. La présente invention peut être utilisée pour des applications, en particulier dans des circuits intégrés de commande de courant pour la modulation d'impulsions en largeur, des circuits intégrés de gestion d'énergie ou des circuits intégrés de commande de moteur.
PCT/KR2014/003901 2013-05-03 2014-05-01 Procédé de modulation d'impulsions en largeur permettant de commander un convertisseur de puissance WO2014178673A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020130049853A KR20140131040A (ko) 2013-05-03 2013-05-03 반송파 펄스 폭 변조 방법
KR10-2013-0049852 2013-05-03
KR20130049852A KR20140131039A (ko) 2013-05-03 2013-05-03 히스테리시스 펄스 폭 변조 방법
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