CN111697813A - Frequency conversion equipment, control method and device of PFC circuit of frequency conversion equipment and storage medium - Google Patents
Frequency conversion equipment, control method and device of PFC circuit of frequency conversion equipment and storage medium Download PDFInfo
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- CN111697813A CN111697813A CN201910188539.7A CN201910188539A CN111697813A CN 111697813 A CN111697813 A CN 111697813A CN 201910188539 A CN201910188539 A CN 201910188539A CN 111697813 A CN111697813 A CN 111697813A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention discloses a frequency conversion device, a control method and a control device of a Power Factor Correction (PFC) circuit of the frequency conversion device, and a storage medium, and belongs to the technical field of frequency conversion systems. The method comprises the following steps: acquiring a temporary direct current bus voltage value and a temporary alternating current input current instantaneous value; and when the temporary direct current bus voltage value is larger than a first set voltage value, increasing the voltage loop bandwidth in the PFC circuit according to the temporary alternating current input current instantaneous value so as to accelerate the PFC voltage loop response speed and slow down the rise of the direct current bus voltage value. According to the invention, the rising of the voltage value of the direct current bus is slowed down by accelerating the response speed of the PFC voltage loop, the adjustment amplitude of the bandwidth of the voltage loop is determined according to the instantaneous value of the alternating current input current, the control of the voltage value of the direct current bus and the alternating current input current is considered, the performance reduction caused by frequent halt of frequency conversion equipment is avoided, and the damage of components of the frequency conversion equipment caused by frequent power failure of a PFC circuit is avoided.
Description
Technical Field
The present invention relates to the field of frequency conversion systems, and in particular, to a frequency conversion device, a method and an apparatus for controlling a Power Factor Correction (PFC) circuit thereof, and a storage medium.
Background
During the operation of the frequency conversion equipment, for example: in order to meet the requirement of harmonic interference during the operation of the inverter air conditioner, the input ac current is generally corrected by a PFC circuit and a correction algorithm, so that the ac input current waveform tracks the ac input voltage to reduce the current harmonic. Meanwhile, the PFC circuit can also realize the voltage boost of the direct current bus and stabilize the voltage to a value far higher than the bus voltage peak value which can be obtained by natural rectification, so that the rotating speed range of the variable frequency compressor is effectively expanded, and favorable conditions are created for the stable operation of the compressor.
In the operation process of the variable frequency air conditioner, if the alternating current input voltage fluctuates abnormally, especially when the alternating current input voltage rises abnormally, the voltage of a direct current bus after the rear-stage rectification rises abnormally, and if the voltage of the direct current bus is also in a PFC (power factor correction) boost control state at the moment, the variable frequency air conditioner triggers the system to be shut down in overvoltage protection due to the fact that the voltage of the direct current bus rises quickly. When the variable frequency air conditioning system is in a high-frequency heavy-load operation state, the performance of the whole variable frequency air conditioning system is affected by overvoltage shutdown caused by abnormal rise of alternating-current input voltage. The method avoids the superposition of abnormal rising of the AC input voltage and abnormal rising of the DC bus voltage caused by PFC boost control, and the scheme disclosed by the prior art mainly comprises the following steps: and (3) detecting that the voltage of the direct current bus exceeds a certain set threshold value, directly stopping the PFC regulation function, and switching the variable frequency air conditioning system to a PFC-free running state. When the variable frequency air conditioning system is in a high-frequency heavy-load operation state, the existing one-knife control easily causes the direct current bus voltage under-voltage shutdown or the alternating current input current overcurrent shutdown, and the possibility of overcurrent damage of components of the rectifying circuit due to instantaneous rise of the alternating current input current exists.
Disclosure of Invention
The embodiment of the invention provides frequency conversion equipment, a control method and a control device of a PFC circuit of the frequency conversion equipment, and a storage medium, and aims to solve the problem that the performance of the frequency conversion equipment is reduced due to a one-time control mode of the PFC circuit in the prior art. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of the embodiments of the present invention, there is provided a control method for a PFC circuit in a frequency conversion device, including:
acquiring a temporary direct current bus voltage value and a temporary alternating current input current instantaneous value;
and when the temporary direct current bus voltage value is larger than a first set voltage value, increasing the voltage loop bandwidth in the PFC circuit according to the temporary alternating current input current instantaneous value so as to accelerate the PFC voltage loop response speed and slow down the rise of the direct current bus voltage value.
In some optional embodiments, said increasing a voltage loop bandwidth in the PFC circuit according to the temporary ac input current transient comprises:
calculating to obtain an effective value of the alternating current input current according to the instantaneous value of the alternating current input current;
determining a bandwidth regulation rate according to the effective value of the alternating current input current;
and increasing the voltage loop bandwidth according to the bandwidth adjusting rate.
In some optional embodiments, said increasing a voltage loop bandwidth in the PFC circuit according to the temporary ac input current transient comprises:
calculating to obtain an effective value of the alternating current input current according to the instantaneous value of the alternating current input current;
determining a bandwidth adjusting step length according to the effective value of the alternating current input current;
and increasing the bandwidth of the voltage loop according to the bandwidth adjusting step length.
In some optional embodiments, before the increasing the bandwidth of the voltage loop in the PFC circuit, the method further includes:
acquiring a temporary voltage loop bandwidth;
when the temporary voltage loop bandwidth is smaller than a bandwidth threshold, the operation of increasing the voltage loop bandwidth in the PFC circuit is executed.
In some optional embodiments, the method further comprises:
acquiring the current voltage loop bandwidth and the current direct-current bus voltage value;
and when the voltage loop bandwidth is smaller than or equal to the bandwidth threshold value and the current direct current bus voltage value is smaller than a first set voltage value, adjusting the voltage loop bandwidth in the PFC circuit to the initial value of the voltage loop bandwidth.
In some optional embodiments, the method further comprises:
and when the voltage value of the temporary direct current bus is greater than a second set voltage value, controlling the PFC circuit to be powered off.
In some optional embodiments, the first set voltage value is determined based on the temporary ac input current transient. The smaller the temporary ac input current transient, the smaller the first set voltage value.
In some alternative embodiments, the second set voltage value is determined based on the temporary ac input current transient. The smaller the temporary ac input current transient, the smaller the second set voltage value.
In some optional embodiments, the method further comprises:
acquiring the current voltage loop bandwidth and the current direct-current bus voltage value;
and when the bandwidth of the current voltage ring is equal to a bandwidth threshold value, and the voltage value of the current direct current bus is greater than the voltage value of the temporary direct current bus and less than or equal to a second set voltage value, maintaining the voltage ring to operate at the bandwidth threshold value.
In some optional embodiments, the method further comprises:
acquiring the current voltage loop bandwidth and the current direct-current bus voltage value;
and when the bandwidth of the current voltage loop is equal to a bandwidth threshold value, and the voltage value of the current direct current bus is greater than the voltage value of the temporary direct current bus and greater than a second set voltage value, controlling the PFC circuit to be powered off.
According to a second aspect of the embodiments of the present invention, an obtaining unit is provided for obtaining a temporary dc bus voltage value and a temporary ac input current instantaneous value;
and the control unit is used for increasing the bandwidth of a voltage loop in the PFC circuit according to the temporary alternating current input current instantaneous value when the temporary direct current bus voltage value is larger than a first set voltage value so as to accelerate the response speed of the PFC voltage loop and slow down the rise of the direct current bus voltage value.
In some optional embodiments, the control unit comprises:
the calculating subunit is used for calculating an effective value of the alternating current input current according to the instantaneous value of the alternating current input current;
the determining subunit is used for determining a bandwidth adjusting rate according to the effective value of the alternating input current;
and the bandwidth adjusting subunit is used for increasing the bandwidth of the voltage loop according to the bandwidth adjusting rate.
In some optional embodiments, the control unit comprises:
the calculating subunit is used for calculating an effective value of the alternating current input current according to the instantaneous value of the alternating current input current;
the determining subunit is used for determining a bandwidth adjusting step length according to the effective value of the alternating current input current;
and the bandwidth adjusting subunit is used for increasing the bandwidth of the voltage loop according to the bandwidth adjusting step length.
In some optional embodiments, the obtaining unit is further configured to obtain a temporary voltage loop bandwidth before the control unit increases the voltage loop bandwidth in the PFC circuit;
and the control unit is used for increasing the bandwidth of the voltage loop in the PFC circuit when the bandwidth of the temporary voltage loop is smaller than a bandwidth threshold value.
In some optional embodiments, the obtaining unit is further configured to obtain a current voltage loop bandwidth and a current dc bus voltage value;
the control unit is further configured to adjust the voltage loop bandwidth in the PFC circuit to an initial value of the voltage loop bandwidth when the voltage loop bandwidth is less than or equal to a bandwidth threshold and the current dc bus voltage value is less than a first set voltage value.
In some optional embodiments, the control unit is further configured to control the PFC circuit to power off when the temporary dc bus voltage value is greater than a second set voltage value.
In some optional embodiments, the first set voltage value is determined based on the temporary ac input current transient. The smaller the temporary ac input current transient, the smaller the first set voltage value.
In some alternative embodiments, the second set voltage value is determined based on the temporary ac input current transient. The smaller the temporary ac input current transient, the smaller the second set voltage value.
In some optional embodiments, the obtaining unit is further configured to obtain a current voltage loop bandwidth and a current dc bus voltage value;
and when the bandwidth of the current voltage ring is equal to a bandwidth threshold value, and the voltage value of the current direct current bus is greater than the voltage value of the temporary direct current bus and less than or equal to a second set voltage value, maintaining the voltage ring to operate at the bandwidth threshold value.
In some optional embodiments, the obtaining unit is further configured to obtain a current voltage loop bandwidth and a current dc bus voltage value;
the control unit is further configured to control the PFC circuit to power off when the current voltage loop bandwidth is equal to a bandwidth threshold, and the current dc bus voltage value is greater than the temporary dc bus voltage value and greater than a second set voltage value.
According to a third aspect of the embodiments of the present invention, there is provided a frequency conversion apparatus, including a memory, a processor, and a program stored on the memory and executable by the processor, wherein the processor implements any one of the aforementioned control methods for a PFC circuit when executing the program.
According to a fourth aspect of embodiments of the present invention, there is provided a storage medium having stored thereon a computer program which, when executed by a processor, implements any of the aforementioned control methods for a PFC circuit.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
in the control process of a PFC circuit in frequency conversion equipment, a voltage loop bandwidth adjustment scheme in the PFC circuit is determined according to a direct current bus voltage value and an alternating current input current instantaneous value, when the direct current bus voltage value is larger than a first set voltage value, the frequency conversion equipment is judged to have the risk of triggering system overvoltage protection shutdown, the PFC voltage loop response speed is increased in a mode of increasing the voltage loop bandwidth to slow down the rise of the direct current bus voltage value, meanwhile, the adjustment range of the voltage loop bandwidth is determined according to the alternating current input current instantaneous value, the direct current bus voltage value and the alternating current input current are controlled, the performance reduction caused by frequent shutdown of the frequency conversion equipment is avoided, and meanwhile, the frequency conversion equipment is prevented from being damaged due to frequent power failure of the PFC circuit.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic flow diagram illustrating a control method for a PFC circuit in a frequency conversion device according to an exemplary embodiment;
fig. 2 is a flow chart illustrating a control method for a PFC circuit in a frequency conversion device according to an exemplary embodiment;
fig. 3 is a flow chart illustrating a control method for a PFC circuit in a frequency conversion device according to an exemplary embodiment;
fig. 4 is a schematic structural diagram illustrating a control apparatus for a PFC circuit in a frequency conversion device according to an exemplary embodiment;
fig. 5 is a schematic structural diagram illustrating a control apparatus for a PFC circuit in a frequency conversion device according to an exemplary embodiment;
fig. 6 is a schematic structural diagram illustrating a control apparatus for a PFC circuit in a frequency conversion device according to an exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.
In the embodiment of the invention, the "current" and the "temporary" are only used for distinguishing the time of acquiring the parameters, and the specific acquisition mode of the parameters is the same. Wherein the "temporary voltage loop bandwidth" refers to a voltage loop bandwidth acquired before the increasing PFC circuit operation is performed, and the "current voltage loop bandwidth" refers to a voltage loop bandwidth acquired after the increasing PFC circuit voltage loop bandwidth operation is performed. The current voltage loop bandwidth is used to determine further operations on the voltage loop bandwidth. Similarly, the "temporary dc bus voltage value" refers to a dc bus voltage value acquired before the increased PFC circuit operation is performed, and the "current dc bus voltage value" refers to a dc bus voltage value acquired after the increased PFC circuit operation is performed.
Fig. 1 shows a control method for a PFC circuit in a frequency conversion device according to an exemplary embodiment, including:
step S101, acquiring a temporary direct current bus voltage value and a temporary alternating current input current instantaneous value;
and step S102, when the voltage value of the temporary direct current bus is greater than a first set voltage value, increasing the voltage loop bandwidth in the PFC circuit according to the temporary alternating current input current instantaneous value.
And the first set voltage value is smaller than the maximum direct current bus voltage value allowed by the frequency conversion equipment system.
And when the temporary direct current bus voltage is less than or equal to the first set voltage value, the system normally operates. When the temporary direct-current bus voltage value is larger than the first set voltage value, the frequency conversion equipment is judged to have the risk of triggering system overvoltage protection shutdown, an overvoltage processing state is switched to, and the operation of increasing the voltage loop bandwidth in the PFC circuit is executed, so that the PFC voltage loop response speed is increased, and the rise of the direct-current bus voltage value is slowed down.
In some optional embodiments, a real-time direct-current bus voltage value is continuously obtained, when the direct-current bus voltage values obtained twice before and after a set time are increased and the direct-current bus voltage value obtained later is greater than a first set voltage value, it is determined that voltage abnormal increase exists in the frequency conversion equipment, the risk of triggering system overvoltage protection shutdown is high, an overvoltage processing state is switched, and operation of increasing the voltage loop bandwidth in the PFC circuit is executed, so that the PFC voltage loop response speed is increased and the increase of the direct-current bus voltage value is slowed down.
In the process of increasing the voltage loop bandwidth in the PFC circuit, the control stability of the alternating current is adversely affected due to the overlarge voltage loop bandwidth fluctuation, and in order to quicken the rise of the voltage value of the direct current bus and give consideration to the control stability of the alternating current, the adjustment quantity of the voltage loop bandwidth in the PFC circuit is determined according to the temporary alternating current input current instantaneous value.
In different embodiments, the manner in which the voltage loop bandwidth in the PFC circuit is increased depends on the temporary ac input current transient.
In some optional embodiments, in step S102, increasing a voltage loop bandwidth in the PFC circuit according to the temporary ac input current transient includes:
calculating to obtain an effective value of the alternating current input current according to the instantaneous value of the alternating current input current;
determining a bandwidth regulation rate according to the effective value of the alternating current input current;
and increasing the voltage loop bandwidth according to the bandwidth adjusting rate.
The bandwidth regulation rate is determined according to a bandwidth regulation rate formula, wherein the bandwidth regulation rate formula is as follows:
wherein K is a bandwidth adjustment rate; i is an effective value of alternating current input current; i.e. isThe rated alternating input current of the frequency conversion equipment.
In the process of increasing the voltage loop bandwidth according to the bandwidth adjusting rate, the voltage loop bandwidth value is as follows:
f＝K×t+f0
wherein f is the current voltage loop bandwidth; k is the bandwidth adjustment rate; f. of0Is the temporary voltage loop bandwidth; and t is the timing duration of the self-increasing voltage loop bandwidth.
In some optional embodiments, in step S102, increasing a voltage loop bandwidth in the PFC circuit according to the temporary ac input current transient includes:
calculating to obtain an effective value of the alternating current input current according to the instantaneous value of the alternating current input current;
determining a bandwidth adjusting step length according to the effective value of the alternating current input current;
and increasing the bandwidth of the voltage loop according to the bandwidth adjusting step length.
The smaller the effective value of the alternating input current is, the larger the bandwidth of the voltage loop is.
When the obtained effective value of the alternating current input current is smaller, the load of the frequency conversion equipment is smaller, and compared with the load of the frequency conversion equipment, the same steep rising amplitude of the alternating current input voltage leads to a faster steep rising speed of the direct current bus voltage, and meanwhile, the steep rising amplitude of the direct current bus voltage is larger, so that the smaller the effective value of the alternating current input current is, the larger the voltage loop bandwidth is, the regulation capacity of the PFC on the direct current bus voltage is improved, and the rise of the direct current bus voltage value is relieved and slowed down.
In the control process of a PFC circuit in frequency conversion equipment, a voltage loop bandwidth adjustment scheme in the PFC circuit is determined according to a direct current bus voltage value and an alternating current input current instantaneous value, when the direct current bus voltage value is larger than a first set voltage value, the frequency conversion equipment is judged to have the risk of triggering system overvoltage protection shutdown, the PFC voltage loop response speed is increased in a mode of increasing the voltage loop bandwidth to slow down the rise of the direct current bus voltage value, meanwhile, the adjustment range of the voltage loop bandwidth is determined according to the alternating current input current instantaneous value, the direct current bus voltage value and the alternating current input current are controlled, the performance reduction caused by frequent shutdown of the frequency conversion equipment is avoided, and meanwhile, the frequency conversion equipment is prevented from being damaged due to frequent power failure of the PFC circuit.
Fig. 2 shows a control method for a PFC circuit in a frequency conversion device according to an exemplary embodiment, including:
step S201, obtaining a temporary DC bus voltage value V0。
When the temporary DC bus voltage value V0Is greater than a first set voltage value V1Then, step S202 is executed to obtain the temporary voltage loop bandwidth f0。
When the temporary voltage loop bandwidth f0Less than a bandwidth threshold fsThen, step S203 is executed to increase the voltage loop bandwidth in the PFC circuit.
In some optional embodiments, the method further comprises: when the temporary DC bus voltage value V0Is greater than the second set voltage value V2And when the power is off, controlling the PFC circuit to be powered off. Wherein the second set voltage value V2Is greater than a first set voltage value V1. When the temporary DC bus voltage value V0Is greater than the second set voltage value V2When the PFC circuit is controlled to be powered off, the DC bus voltage is quickly consumed and reduced to a second set voltage value V under the action of a rear-stage load of the PFC circuit2In order to avoid the frequency conversion equipment from stopping.
In some optional embodiments, the first set voltage value V1Based on the temporary ac input current transient. The smaller the temporary AC input current transient value is, the smaller the first set voltage value V is1The smaller.
When the obtained effective value of the alternating current input current is smaller, the load of the frequency conversion equipment is smaller, and compared with the load of the frequency conversion equipment, the same steep rising amplitude of the alternating current input voltage leads to a faster steep rising speed of the direct current bus voltage, and meanwhile, the steep rising amplitude of the direct current bus voltage is larger, so that the first set voltage value V is1The smaller the voltage loop bandwidth in the PFC circuit is, the earlier the voltage loop bandwidth in the PFC circuit is increased, and the rise of the voltage value of the direct-current bus can be timely restrained or relieved.
Specifically, the method comprises the following steps:
calculating to obtain an effective value of the alternating current input current according to the instantaneous value of the alternating current input current;
determining a first set voltage value V according to the effective value of the AC input current1。
Wherein the first set voltage value V is determined according to the following formula1：
V1＝Vmax-10K1，
Wherein, V1Is a first set voltage value; vmaxThe maximum allowed direct current bus voltage value of the system; k1Is a first set voltage value V1The correction value of (1); i is an effective value of alternating current input current; i.e. isThe rated alternating input current of the frequency conversion equipment.
In some optional embodiments, the second setting voltage value V2Based on the temporary ac input current transient. The smaller the temporary AC input current transient value is, the lower the second set voltage value V is2The smaller.
When the obtained effective value of the alternating current input current is smaller, the load of the frequency conversion equipment is smaller, and compared with the load of the frequency conversion equipment, the same steep rising amplitude of the alternating current input voltage leads to a faster steep rising speed of the direct current bus voltage, and meanwhile, the steep rising amplitude of the direct current bus voltage is larger, so that the second set voltage value V is2The smaller the voltage loop bandwidth in the PFC circuit is, the earlier the voltage loop bandwidth in the PFC circuit is increased, and the rise of the voltage value of the direct-current bus can be timely restrained or relieved.
Specifically, the method comprises the following steps:
calculating to obtain an effective value of the alternating current input current according to the instantaneous value of the alternating current input current;
determining a second set voltage value V according to the effective value of the AC input current2。
Wherein the second setting voltage value V is determined according to the following formula2：
V2＝Vmax-10K2，
Wherein, V2Is a second set voltage value; vmaxThe maximum allowed direct current bus voltage value of the system; k2For a second set voltage value V2The correction value of (1); i is a crossA current input current effective value; i.e. isThe rated alternating input current of the frequency conversion equipment.
In the foregoing embodiment, in the normal rising and falling processes of the dc bus voltage, the control stability of the ac current is adversely affected by an excessively large voltage loop bandwidth, and therefore, a voltage loop bandwidth threshold f may be set in the frequency conversion device systems. In the process of increasing the bandwidth according to the set step value, the voltage loop bandwidth in the PFC circuit is less than or equal to the voltage loop bandwidth threshold fsDoes not exceed a voltage loop bandwidth threshold fs。
In some optional embodiments, in step S102, in the process of increasing the bandwidth of the voltage loop in the PFC circuit, the method further includes:
acquiring the current voltage loop bandwidth and the current direct-current bus voltage value;
and when the voltage loop bandwidth is smaller than or equal to the bandwidth threshold value and the current direct current bus voltage value is smaller than a first set voltage value, adjusting the voltage loop bandwidth in the PFC circuit to the initial value of the voltage loop bandwidth.
In order to meet the adjusting function of the PFC circuit on the voltage of the direct current bus and the input alternating current, the PFC circuit is provided with an initial value of the bandwidth of a voltage loop. The initial value of the bandwidth of the voltage loop is smaller than the bandwidth threshold value, and the initial value is the minimum bandwidth when the PFC circuit is powered on. The method comprises the steps that the voltage loop bandwidth in the PFC circuit is increased, the PFC circuit is accelerated to restrain the voltage of a direct current bus from rising, shutdown of frequency conversion equipment is avoided, when the current voltage loop bandwidth obtained in the process of increasing the voltage loop bandwidth in the PFC circuit is smaller than a first set voltage value, the possibility that overvoltage shutdown occurs on the frequency conversion equipment is reduced, and the voltage loop bandwidth in the PFC circuit is adjusted to the initial value of the voltage loop bandwidth in order to improve the stability of input alternating current control.
In some optional embodiments, in step S102, in the process of increasing the bandwidth of the voltage loop in the PFC circuit, the method further includes:
acquiring the current voltage loop bandwidth and the current direct-current bus voltage value;
and when the bandwidth of the current voltage ring is equal to a bandwidth threshold value, and the voltage value of the current direct current bus is greater than the voltage value of the temporary direct current bus and less than or equal to a second set voltage value, maintaining the voltage ring to operate at the bandwidth threshold value.
In some optional embodiments, the method further comprises:
acquiring the current voltage loop bandwidth and the current direct-current bus voltage value;
and when the bandwidth of the current voltage loop is equal to a bandwidth threshold value, and the voltage value of the current direct current bus is greater than the voltage value of the temporary direct current bus and greater than a second set voltage value, controlling the PFC circuit to be powered off.
As shown in fig. 3, a control method for a PFC circuit in a frequency conversion device according to an exemplary embodiment includes:
step S201, obtaining a temporary DC bus voltage value V0。
When the temporary DC bus voltage value V0Is greater than a first set voltage value V1Then, step S202 is executed to obtain the temporary voltage loop bandwidth f0。
When the temporary voltage loop bandwidth f0Less than a bandwidth threshold fsThen, step S203 is executed to increase the voltage loop bandwidth in the PFC circuit.
In the process of increasing the voltage loop bandwidth in the PFC circuit, step S301 is executed to obtain the current voltage loop bandwidth ftAnd the current DC bus voltage value Vt。
The current DC bus voltage value VtIs less than the first set voltage value V1In the meantime, the possibility of overvoltage shutdown of the frequency conversion equipment is reduced, and in order to improve the stability of the control of the input alternating current, step S302 is executed to adjust the voltage loop bandwidth in the PFC circuit to the initial value of the voltage loop bandwidth.
The current DC bus voltage value VtIs greater than or equal to the first set voltage value V1And is less than the second set voltage value V2If the current voltage loop bandwidth is equal to the bandwidth threshold fsAnd avoiding the adverse effect of the overlarge bandwidth of the voltage loop on the control stability of the alternating current, executing the step S303, and maintaining the bandwidth threshold f of the voltage loopsRunning; if the bandwidth of the current voltage ring is less than the bandwidth threshold fsThen continue to execute stepIn step S203, the voltage loop bandwidth in the PFC circuit is increased.
The current DC bus voltage value VtIs greater than or equal to a second set voltage value V2And judging that the frequency conversion equipment is easy to generate overvoltage shutdown, executing the step S304, and controlling the PFC circuit to be powered off. After the PFC circuit is controlled to be powered off, under the action of a rear-stage load of the PFC circuit, the DC bus voltage is quickly consumed and reduced to a second set voltage value V2In order to avoid the frequency conversion equipment from stopping.
In some optional embodiments, after step S304, the method further comprises:
when the voltage value of the direct current bus is less than or equal to a first set voltage value V1And adjusting the voltage loop bandwidth of the PFC circuit to the initial bandwidth, and controlling the PFC circuit to be electrified and operated.
The following is a device provided in an embodiment of the present invention, configured to execute the control method for the PFC circuit in the frequency conversion device provided in the foregoing embodiment.
As shown in fig. 4, a control apparatus for a PFC circuit in a frequency conversion device according to an exemplary embodiment includes: an acquisition unit 401 and a control unit 402.
The obtaining unit 401 is configured to obtain a temporary dc bus voltage value and a temporary ac input current instantaneous value.
And the control unit 402 is configured to, when the temporary dc bus voltage value is greater than a first set voltage value, increase a voltage loop bandwidth in the PFC circuit according to the temporary ac input current instantaneous value, so as to increase a PFC voltage loop response speed and slow down a rise of the dc bus voltage value.
And the first set voltage value is smaller than the maximum direct current bus voltage value allowed by the frequency conversion equipment system.
And when the temporary direct current bus voltage is less than or equal to the first set voltage value, the system normally operates. When the temporary direct-current bus voltage value is larger than the first set voltage value, the frequency conversion equipment is judged to have the risk of triggering system overvoltage protection shutdown, an overvoltage processing state is switched to, and the operation of increasing the voltage loop bandwidth in the PFC circuit is executed, so that the PFC voltage loop response speed is increased, and the rise of the direct-current bus voltage value is slowed down.
In some optional embodiments, a real-time direct-current bus voltage value is continuously obtained, when the direct-current bus voltage values obtained twice before and after a set time are increased and the direct-current bus voltage value obtained later is greater than a first set voltage value, it is determined that voltage abnormal increase exists in the frequency conversion equipment, the risk of triggering system overvoltage protection shutdown is high, an overvoltage processing state is switched, and operation of increasing the voltage loop bandwidth in the PFC circuit is executed, so that the PFC voltage loop response speed is increased and the increase of the direct-current bus voltage value is slowed down.
In the process of increasing the voltage loop bandwidth in the PFC circuit, the control stability of the alternating current is adversely affected due to the overlarge voltage loop bandwidth fluctuation, and in order to quicken the rise of the voltage value of the direct current bus and give consideration to the control stability of the alternating current, the adjustment quantity of the voltage loop bandwidth in the PFC circuit is determined according to the temporary alternating current input current instantaneous value.
In different embodiments, the control unit 402 increases the voltage loop bandwidth in the PFC circuit differently depending on the temporary ac input current transient.
In some alternative embodiments, as shown in fig. 5, the control unit 402 includes:
the calculating subunit 4021 is configured to calculate an ac input current effective value according to the ac input current instantaneous value.
The determining subunit 4022 is configured to determine a bandwidth adjustment rate according to the effective value of the ac input current.
And the bandwidth adjusting subunit 4023 is configured to increase the bandwidth of the voltage loop according to the bandwidth adjusting rate.
The determining subunit 4022 determines the bandwidth adjustment rate according to a bandwidth adjustment rate formula, which is the formula (1) provided in the foregoing embodiments.
In some alternative embodiments, as shown in fig. 6, the control unit 402 includes:
the calculating subunit 4024 is configured to calculate an ac input current effective value according to the ac input current instantaneous value.
The determining subunit 4025 is configured to determine a bandwidth adjusting step size according to the effective value of the ac input current.
And the bandwidth adjusting subunit 4026 is configured to increase the bandwidth of the voltage loop according to the bandwidth adjusting step.
The smaller the effective value of the alternating input current is, the larger the bandwidth of the voltage loop is.
When the obtained effective value of the alternating current input current is smaller, the load of the frequency conversion equipment is smaller, and compared with the smaller load of the frequency conversion equipment, the same steep rise amplitude of the alternating current input voltage leads to a faster steep rise speed of the direct current bus voltage, and meanwhile, the steep rise amplitude of the direct current bus voltage is larger, so that the smaller the effective value of the alternating current input current is, the larger the voltage loop bandwidth is, the regulating capacity of the PFC on the direct current bus voltage is improved, and the rise of the direct current bus voltage is relieved and slowed down.
In the control process of a PFC circuit in frequency conversion equipment, a voltage loop bandwidth adjustment scheme in the PFC circuit is determined according to a direct current bus voltage value and an alternating current input current instantaneous value, when the direct current bus voltage value is larger than a first set voltage value, the frequency conversion equipment is judged to have the risk of triggering system overvoltage protection shutdown, the PFC voltage loop response speed is increased in a mode of increasing the voltage loop bandwidth to slow down the rise of the direct current bus voltage value, meanwhile, the adjustment range of the voltage loop bandwidth is determined according to the alternating current input current instantaneous value, the direct current bus voltage value and the alternating current input current are controlled, the performance reduction caused by frequent shutdown of the frequency conversion equipment is avoided, and meanwhile, the frequency conversion equipment is prevented from being damaged due to frequent power failure of the PFC circuit.
In some optional embodiments, the obtaining unit 401 is further configured to obtain the temporary voltage loop bandwidth before the control unit increases the voltage loop bandwidth in the PFC circuit.
A control unit 402, configured to increase a voltage loop bandwidth in the PFC circuit when the temporary voltage loop bandwidth is smaller than a bandwidth threshold.
In some optional embodiments, the control unit 402 is further configured to control the PFC circuit to power off when the temporary dc bus voltage value is greater than a second set voltage value. The second setting voltage value is larger than the first setting voltage value. When the temporary direct current bus voltage value is larger than the second set voltage value, after the PFC circuit is controlled to be powered off, under the action of a rear-stage load of the PFC circuit, the direct current bus voltage is rapidly consumed and drops below the second set voltage value, so that the frequency conversion equipment is prevented from being stopped.
In some optional embodiments, the first set voltage value is determined based on the temporary ac input current transient. The smaller the temporary ac input current transient, the smaller the first set voltage value.
Specifically, the method comprises the following steps:
calculating to obtain an effective value of the alternating current input current according to the instantaneous value of the alternating current input current;
and determining a first set voltage value according to the effective value of the alternating current input current.
Wherein the first setting voltage value is determined according to equation (2) provided in the foregoing embodiment.
In some alternative embodiments, the second set voltage value is determined based on the temporary ac input current transient. The smaller the temporary ac input current transient, the smaller the second set voltage value.
Specifically, the method comprises the following steps:
calculating to obtain an effective value of the alternating current input current according to the instantaneous value of the alternating current input current;
and determining a second set voltage value according to the effective value of the alternating current input current.
Wherein the second setting voltage value is determined according to equation (3) provided in the foregoing embodiment.
In the foregoing embodiment, in the normal rising and falling processes of the dc bus voltage, an excessively large voltage loop bandwidth may adversely affect the control stability of the ac current, and therefore, a voltage loop bandwidth threshold may be set in the frequency conversion device system. In the process of increasing the bandwidth according to the set step value, the voltage loop bandwidth in the PFC circuit is smaller than or equal to the voltage loop bandwidth threshold and does not exceed the voltage loop bandwidth threshold.
In some optional embodiments, the obtaining unit 401 is further configured to obtain a current voltage loop bandwidth and a current dc bus voltage value.
The control unit 402 is further configured to adjust the voltage loop bandwidth in the PFC circuit to an initial value of the voltage loop bandwidth when the voltage loop bandwidth is smaller than or equal to a bandwidth threshold and the current dc bus voltage value is smaller than a first set voltage value.
In order to meet the adjusting function of the PFC circuit on the voltage of the direct current bus and the input alternating current, the PFC circuit is provided with an initial value of the bandwidth of a voltage loop. The initial value of the bandwidth of the voltage loop is smaller than the bandwidth threshold value, and the initial value is the minimum bandwidth when the PFC circuit is powered on. The method comprises the steps that the voltage loop bandwidth in the PFC circuit is increased, the PFC circuit is accelerated to restrain the voltage of a direct current bus from rising, shutdown of frequency conversion equipment is avoided, when the current voltage loop bandwidth obtained in the process of increasing the voltage loop bandwidth in the PFC circuit is smaller than a first set voltage value, the possibility that overvoltage shutdown occurs on the frequency conversion equipment is reduced, and the voltage loop bandwidth in the PFC circuit is adjusted to the initial value of the voltage loop bandwidth in order to improve the stability of input alternating current control.
In some optional embodiments, the obtaining unit 401 is further configured to obtain a current voltage loop bandwidth and a current dc bus voltage value.
And when the bandwidth of the current voltage ring is equal to a bandwidth threshold value, and the voltage value of the current direct current bus is greater than the voltage value of the temporary direct current bus and less than or equal to a second set voltage value, maintaining the voltage ring to operate at the bandwidth threshold value.
In some optional embodiments, the obtaining unit 401 is further configured to obtain a current voltage loop bandwidth and a current dc bus voltage value.
The control unit 402 is further configured to control the PFC circuit to power off when the bandwidth of the current voltage loop is equal to a bandwidth threshold, and the voltage value of the current dc bus is greater than the voltage value of the temporary dc bus and greater than a second set voltage value.
In some optional embodiments, the obtaining unit 401 is further configured to obtain a current voltage loop bandwidth and a current dc bus voltage value.
When the current dc bus voltage value is smaller than the first set voltage value, the possibility of overvoltage shutdown of the frequency conversion device is reduced, and in order to improve the stability of the input ac current control, the control unit 402 adjusts the voltage loop bandwidth in the PFC circuit to the initial voltage loop bandwidth value.
When the current direct-current bus voltage value is greater than or equal to the first set voltage value and less than the second set voltage value, if the current voltage loop bandwidth is equal to the bandwidth threshold, the adverse effect on the control stability of the alternating current caused by overlarge voltage loop bandwidth is avoided, and the voltage loop is maintained to operate at the bandwidth threshold; if the current voltage loop bandwidth is smaller than the bandwidth threshold, the control unit 402 increases the voltage loop bandwidth in the PFC circuit.
When the current direct-current bus voltage value is greater than or equal to the second set voltage value, it is determined that the frequency conversion device is prone to overvoltage shutdown, and the control unit 402 controls the PFC circuit to be powered off. After the PFC circuit is controlled to be powered off, under the action of a rear-stage load of the PFC circuit, the voltage of the direct-current bus is rapidly consumed and drops below a second set voltage value, so that the frequency conversion equipment is prevented from being stopped.
In some optional embodiments, the control unit 402 is further configured to adjust a voltage loop bandwidth of the PFC circuit to an initial bandwidth when the dc bus voltage value is less than or equal to the first set voltage value, and control the PFC circuit to operate in power-on mode.
In some optional embodiments, there is further provided a frequency conversion device, including a memory, a processor, and a program stored on the memory and executable by the processor, where the processor executes the program to implement the control method for the PFC circuit provided in any one of the foregoing embodiments.
In some optional embodiments, there is also provided a storage medium having stored thereon a computer program which, when executed by a processor, implements the control method for the PFC circuit provided by any of the preceding embodiments.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as a memory comprising instructions, executable by a processor to perform the method described above is also provided. The non-transitory computer readable storage medium may be a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic tape, an optical storage device, and the like.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, it should be understood that the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
It should be understood that the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. The present invention is not limited to the procedures and structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (12)
1. A control method for a PFC circuit in a frequency conversion device is characterized by comprising the following steps:
acquiring a temporary direct current bus voltage value and a temporary alternating current input current instantaneous value;
and when the temporary direct current bus voltage value is larger than a first set voltage value, increasing the voltage loop bandwidth in the PFC circuit according to the temporary alternating current input current instantaneous value so as to accelerate the PFC voltage loop response speed and slow down the rise of the direct current bus voltage value.
2. The method of claim 1, wherein increasing a voltage loop bandwidth in a PFC circuit based on the temporary ac input current transient comprises:
calculating to obtain an effective value of the alternating current input current according to the instantaneous value of the alternating current input current;
determining a bandwidth regulation rate according to the effective value of the alternating current input current;
and increasing the voltage loop bandwidth according to the bandwidth adjusting rate.
3. The method of claim 1, further comprising, prior to said increasing the voltage loop bandwidth in the PFC circuit:
acquiring a temporary voltage loop bandwidth;
when the temporary voltage loop bandwidth is smaller than a bandwidth threshold, the operation of increasing the voltage loop bandwidth in the PFC circuit is executed.
4. The method of claim 1, further comprising:
and when the voltage value of the temporary direct current bus is greater than a second set voltage value, controlling the PFC circuit to be powered off.
5. The method of claim 1, further comprising:
acquiring the current voltage loop bandwidth and the current direct-current bus voltage value;
and when the bandwidth of the current voltage ring is equal to a bandwidth threshold value, and the voltage value of the current direct current bus is greater than the voltage value of the temporary direct current bus and less than or equal to a second set voltage value, maintaining the voltage ring to operate at the bandwidth threshold value.
6. A control device for a PFC circuit, comprising:
the acquisition unit is used for acquiring a temporary direct current bus voltage value and a temporary alternating current input current instantaneous value;
and the control unit is used for increasing the bandwidth of a voltage loop in the PFC circuit according to the temporary alternating current input current instantaneous value when the temporary direct current bus voltage value is larger than a first set voltage value so as to accelerate the response speed of the PFC voltage loop and slow down the rise of the direct current bus voltage value.
7. The apparatus of claim 6, wherein the control unit comprises:
the calculating subunit is used for calculating an effective value of the alternating current input current according to the instantaneous value of the alternating current input current;
the determining subunit is used for determining a bandwidth adjusting rate according to the effective value of the alternating input current;
and the bandwidth adjusting subunit is used for increasing the bandwidth of the voltage loop according to the bandwidth adjusting rate.
8. The apparatus of claim 6, wherein the obtaining unit is further configured to obtain a temporary voltage loop bandwidth before the control unit increases the voltage loop bandwidth in the PFC circuit;
and the control unit is used for increasing the bandwidth of the voltage loop in the PFC circuit when the bandwidth of the temporary voltage loop is smaller than a bandwidth threshold value.
9. The device of claim 6, wherein the control unit is further configured to control the PFC circuit to be powered off when the temporary DC bus voltage value is greater than a second set voltage value.
10. The device of claim 6, wherein the obtaining unit is further configured to obtain a current voltage loop bandwidth and a current dc bus voltage value;
and when the bandwidth of the current voltage ring is equal to a bandwidth threshold value, and the voltage value of the current direct current bus is greater than the voltage value of the temporary direct current bus and less than or equal to a second set voltage value, maintaining the voltage ring to operate at the bandwidth threshold value.
11. A frequency conversion device comprising a memory, a processor and a program stored on the memory and executable by the processor, characterized in that the processor implements the control method for a PFC circuit according to any one of claims 1 to 5 when executing the program.
12. A storage medium having stored thereon a computer program, characterized in that the computer program realizes the control method for a PFC circuit according to any one of claims 1 to 5 when executed by a processor.
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| CN201910188539.7A CN111697813B (en) | 2019-03-13 | 2019-03-13 | Frequency conversion equipment, control method and device of PFC circuit of frequency conversion equipment and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116334878A (en) * | 2023-05-24 | 2023-06-27 | 峰岹科技(深圳)股份有限公司 | Dynamic threshold control method and device for voltage ring, electronic equipment and storage medium |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308406A (en) * | 2000-12-26 | 2001-08-15 | 深圳市华为电气技术有限公司 | Triphase single-switch power factor correcting step-up converter |
| CN102457175A (en) * | 2010-10-29 | 2012-05-16 | 英飞特电子（杭州）有限公司 | Circuit and method used for improving dynamic response speed of PFC (power factor correction) |
| US20120299580A1 (en) * | 2008-05-12 | 2012-11-29 | Cosmic Circuits Private Limited | Transient recovery circuit for switching devices |
| US20140340061A1 (en) * | 2013-05-17 | 2014-11-20 | Kabushiki Kaisha Toshiba | Dc-dc converter control circuit and dc-dc converter |
| CN204615631U (en) * | 2015-02-04 | 2015-09-02 | 上海科世达-华阳汽车电器有限公司 | A kind of busbar voltage ripple compensation control circuit of circuit of power factor correction |
| CN104953813A (en) * | 2015-06-26 | 2015-09-30 | 广东美的制冷设备有限公司 | Method and device for preventing output voltage of PFC (power factor correction) circuit from getting up to overvoltage |
| CN105009432A (en) * | 2012-11-16 | 2015-10-28 | 凌力尔特公司 | Feed forward current mode switching regulator with improved transient response |
| US20170373585A1 (en) * | 2016-06-26 | 2017-12-28 | The Regents Of The University Of Colorado, A Body Corporate | Hybrid feedforward control architecture and related techniques |
| US20180048228A1 (en) * | 2016-08-12 | 2018-02-15 | Chroma Ate Inc. | Output control method for controller |
| CN108696156A (en) * | 2018-07-27 | 2018-10-23 | 深圳英飞源技术有限公司 | A kind of control method and its device of supply convertor |
| US20190013729A1 (en) * | 2016-08-19 | 2019-01-10 | Fairchild Semiconductor Corporation | Power factor correction circuit and method |
-
2019
- 2019-03-13 CN CN201910188539.7A patent/CN111697813B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308406A (en) * | 2000-12-26 | 2001-08-15 | 深圳市华为电气技术有限公司 | Triphase single-switch power factor correcting step-up converter |
| US20120299580A1 (en) * | 2008-05-12 | 2012-11-29 | Cosmic Circuits Private Limited | Transient recovery circuit for switching devices |
| CN102457175A (en) * | 2010-10-29 | 2012-05-16 | 英飞特电子（杭州）有限公司 | Circuit and method used for improving dynamic response speed of PFC (power factor correction) |
| CN105009432A (en) * | 2012-11-16 | 2015-10-28 | 凌力尔特公司 | Feed forward current mode switching regulator with improved transient response |
| US20140340061A1 (en) * | 2013-05-17 | 2014-11-20 | Kabushiki Kaisha Toshiba | Dc-dc converter control circuit and dc-dc converter |
| CN204615631U (en) * | 2015-02-04 | 2015-09-02 | 上海科世达-华阳汽车电器有限公司 | A kind of busbar voltage ripple compensation control circuit of circuit of power factor correction |
| CN104953813A (en) * | 2015-06-26 | 2015-09-30 | 广东美的制冷设备有限公司 | Method and device for preventing output voltage of PFC (power factor correction) circuit from getting up to overvoltage |
| US20170373585A1 (en) * | 2016-06-26 | 2017-12-28 | The Regents Of The University Of Colorado, A Body Corporate | Hybrid feedforward control architecture and related techniques |
| US20180048228A1 (en) * | 2016-08-12 | 2018-02-15 | Chroma Ate Inc. | Output control method for controller |
| US20190013729A1 (en) * | 2016-08-19 | 2019-01-10 | Fairchild Semiconductor Corporation | Power factor correction circuit and method |
| CN108696156A (en) * | 2018-07-27 | 2018-10-23 | 深圳英飞源技术有限公司 | A kind of control method and its device of supply convertor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116334878A (en) * | 2023-05-24 | 2023-06-27 | 峰岹科技(深圳)股份有限公司 | Dynamic threshold control method and device for voltage ring, electronic equipment and storage medium |
| CN116334878B (en) * | 2023-05-24 | 2023-08-18 | 峰岹科技(深圳)股份有限公司 | Dynamic threshold control method and device for voltage ring, electronic equipment and storage medium |
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|---|---|
| CN111697813B (en) | 2022-03-04 |
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