CN110277896A - It is a kind of for controlling the novel active temperature control strategy of H bridge topological structure entirely - Google Patents
It is a kind of for controlling the novel active temperature control strategy of H bridge topological structure entirely Download PDFInfo
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- CN110277896A CN110277896A CN201910622803.3A CN201910622803A CN110277896A CN 110277896 A CN110277896 A CN 110277896A CN 201910622803 A CN201910622803 A CN 201910622803A CN 110277896 A CN110277896 A CN 110277896A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- 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 active temperature control strategy of full control H bridge topological structure, belong to field of power electronics, the present invention is in order to solve the problems, such as influence system performance present in existing converters device for power switching temperature control strategy and to be confined to passively radiate, it discloses a kind of for controlling the novel active temperature control strategy of H bridge topological structure entirely, including controls H bridge topological structure, active temperature controller and PWM signal generator entirely.By detecting the temperature of each full-controlled switch pipe and the dynamic relationship of given threshold temperature, different driving signals is configured for each full-controlled switch pipe, converter is controlled in H bridge and without switchover operation between bridge mode, to realize that the temperature of the switch tube by way of reducing specific full-controlled switch pipe loss carries out active control.During active temperature control strategy is implemented, full H bridge topology of controlling can continue to operate normally, and increase initiative for traditional passive heat radiation mode, and solve the problems, such as that existing method can reduce performance.
Description
Technical field
The present invention relates to the active temperature controls of the full control H bridge topological structure in converters reliability consideration field
System strategy more particularly to a kind of active temperature control strategy realized by changing topological modulation system.
Background technique
Full control H bridge topological structure in converters using extremely wide, as PWM rectifier, DC/DC are converted
Device, cascade multilevel converter and Modular multilevel converter etc..Using the converters energy of full control H bridge structure
It enough realizes the higher degree of modularity, greatly improves the redundancy, scalability and fault-tolerant ability of whole system all.In recent years
Come, with the promotion of the quantity and power density of device for power switching, the reliability of converters, which is increasingly becoming, is ground
Study carefully hot spot.For device for power switching, the aging speed that can all aggravate device is accumulated in the voltge surge of high frequency and thermal losses
Degree, relevant literature research also indicate that the failure rate of power device is about 32% in power electronic system, and with number of devices
Increase, failure rate even can rise to 82.5%.Converters are as widely used device for converting electric energy, and one
Denier breaks down, and gently then causes equipment downtime, stops production, and it will cause catastrophic failures for weight, to people's lives and properties and social band
Carry out massive losses.The aging speed of device for power switching how is reduced, i.e., is just actively dropped before device for power switching breaks down
Its low thermal stress is the important content of current converters reliability consideration.
Currently, studying the active temperature control strategy for applying full control H bridge topological transformation device mainly from following two
Aspect is started with: a kind of mode is the transimission power by adjusting H bridge module, is chiefly used in modularization or cascade structure etc. and has to repeat
The converter of redundancy structure；Another then realized by the operating parameter of regulation power switching device itself, main includes opening
Close frequency, modulation system and actuation techniques etc..For example, Youngjong Ko etc. is in entitled Power Routing for
Each H bridge module is dynamically adjusted by injecting the method for triple-frequency harmonics in the article of Cascaded H-Bridge Converters
Temperature, the degree of aging between balanced each submodule；It proposes to be higher than in converter temperature in Chinese patent CN104731124B and set
When determining threshold value, the temperature of converter is reduced by way of it will export electric current and halve.But by analysis it can be found that these
There is scheme to there is problems or defect:
1. improving hardware cost by the way of additional redundancy structure；
2. reducing transducer performance by way of controlling temperature changing operating parameter；
Summary of the invention
It is an object of the invention to solve the defect of existing active temperature control method, propose a kind of based on improvement modulation methods
The active temperature control strategy of formula, the Technics of Power Electronic Conversion suitable for the energy one direction transmission application based on full control H bridge topology
Device.
Novel active temperature control strategy of the present invention is that the switch state redundancy based on full control H bridge topology itself is special
Property design, can be applicable in the converter that any amount controls H bridge module entirely, not need additional backup or redundant module,
Transducer performance will not be had an impact.
Novel active temperature control strategy system of the present invention includes full control H bridge topological structure, active temperature control
Device and PWM signal generator.
One of the present invention full control H bridge topological structure is made of four full-controlled switch pipes, can be used for PWM rectifier
Or the converters for constituting the transmission of the energy one directions such as pfc converter are combined with DC/DC converter.It is of the present invention
Novel active temperature control strategy can be described as: when the mean temperature of the full-controlled switch pipe of converter reaches given threshold
When, no bridge or H bridge operational mode are converted thereof by changing modulation strategy, by reducing the loss of certain power switching device
Method realizes the active control to its temperature, while not having an impact to the operating status of converter itself.To realize the above mesh
, method of the present invention includes:
1. the full-controlled switch pipe of control H bridge topological structure must be controlled by independent driving signal entirely, enable converter
Enough to work under a variety of methods of operation, the driving signal of the full-controlled switch pipe of upper and lower bridge arm is complementary on state to prevent bridge
Arm is straight-through to occur short circuit；
2. connecting the shell temperature that a temperature sensor is used to obtain each full-controlled switch pipe on each full-controlled switch pipe
The method of operation of full control H bridge is then switched to by information when the shell temperature mean temperature of full-controlled switch pipe is higher than the threshold value of setting
Accordingly without the bridge method of operation；
3. when the temperature difference of upper bridge arm and lower bridge arm or left bridge arm and right bridge arm full-controlled switch pipe is more than the threshold value of setting,
Dual structure switching is carried out to no bridge method of operation；
4. when upper bridge arm and lower bridge arm or the temperature difference of the full-controlled switch pipe of left bridge arm and right bridge arm are less than the threshold value of setting
When, then the modulation system of H bridge is reverted into the full control H bridge method of operation；
5. controller is according to different no bridge operating statuses there are four types of the no bridge method of operation according to the present invention is total
Full-controlled switch pipe distributes different control signals.
The full-controlled switch pipe can be IGBT (insulated gate bipolar transistor) or IGCT (integrated gate commutated crystalline substance lock
Pipe) or MOSFET (electric power field effect transistor).
Above-described active temperature control strategy is suitable for the converters using full control H bridge topological structure,
The specially energy two-way transmission converter of energy one direction transmission converter or work in energy one direction transmission state.This
The active temperature control strategy for inventing the full control H bridge topology has following features and advantage:
1. reducing cost of hardware design without increasing additional redundancy device；
2. the control strategy of pair converter does not require, only need to the control signal to device for power switching accordingly adjusted
It is whole；
3. method of operation switching is smooth, the working condition of converter itself is unaffected.
Detailed description of the invention
Fig. 1 is the full control H bridge topological structure schematic diagram of one embodiment of the invention；
Fig. 2 is the pwm pulse signal schematic diagram generated by duty ratio according to one embodiment of the invention；
Fig. 3 is according to the employing mode one of one embodiment of the invention without bridge method of operation schematic diagram；
Fig. 4 is according to the employing mode two of one embodiment of the invention without bridge method of operation schematic diagram；
Fig. 5 is according to the employing mode three of one embodiment of the invention without bridge method of operation schematic diagram；
Fig. 6 is according to the employing mode four of one embodiment of the invention without bridge method of operation schematic diagram；
Fig. 7 is the novel active thermal control method flow chart according to one embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, the embodiment is shown in the accompanying drawings, wherein it is identical from beginning to end or
Similar label indicates same or similar element or the element with identical similar functions.Below with reference to attached drawing description
Embodiment is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings plan is controlled to describe the active temperature of the full control H bridge topological structure of proposition of the embodiment of the present invention
Slightly.
As shown in Figure 1, full control H bridge topological structure according to an embodiment of the present invention and corresponding active temperature control system
System, including H bridge topological structure, PWM signal generator and active temperature controller are controlled entirely.Active temperature controller is by PID control
Device, temperature detecting module composition.PWM signal generator is used to generate the driving signal of each full control property switching tube.It is retouched following
In the embodiment stated, the quantity of full-control type device for power switching is four, and four full-controlled switch pipes constitute a full control H bridge electricity
Road topology.It is understood that according to actual needs, the quantity of the full-controlled switch pipe can carry out adjustment appropriate, and
It is not limited to four.In Fig. 1, full H bridge topological structure port voltage of controlling is us, circuit element includes the first full-controlled switch pipe
S1, the second full-controlled switch pipe S2, third full-controlled switch pipe S3, the 4th full-controlled switch pipe S4, and open with corresponding full-control type
It closes and manages corresponding first diode D1, the second diode D2, third diode D3, the 4th diode D4。usPort one end and first
Full-controlled switch pipe S1Emitter and second switch S2Collector be connected, the other end and third full-controlled switch pipe S3's
Emitter and the 4th full-controlled switch pipe S4Collector be connected；First full-controlled switch pipe S1Collector and third full-control type
Switching tube S3Collector be connected, the second full-controlled switch pipe S2With the 4th full-controlled switch pipe S4Emitter be connected.
The corresponding diode of full-controlled switch pipe in the embodiment of the present invention is not limited to two pole of body of full-controlled switch pipe
Pipe, is also possible to the diode in parallel with full-controlled switch pipe.
Different switches constitutes following four bridge arm:
First full-controlled switch pipe S1With the second full-controlled switch pipe S2Group helps the left bridge arm of control H bridge topological structure；
Third full-controlled switch pipe S3With the 4th full-controlled switch pipe S4Group helps the right bridge arm of control H bridge topological structure；
First full-controlled switch pipe S1With third full-controlled switch pipe S3Group helps the upper bridge arm of control H bridge topological structure；
Second full-controlled switch pipe S2With the 4th full-controlled switch pipe S4Group helps the lower bridge arm of control H bridge topological structure.
To be described to active temperature control strategy of the present invention, the variable of appearance or symbol are said here
It is bright.The driving signal of four full-controlled switch tube devices is the first full-controlled switch pipe S1Gate driving pulse G1, the second full-control type
Switching tube S2Gate driving pulse G2, third full-controlled switch pipe S3Gate driving pulse G3, the 4th full-controlled switch pipe S4Grid
Driving pulse G4。
The modulation wave signal that control system is exported is d.PWM1 is one to be believed by the driving pulse that modulation wave signal D is generated
Number, andFor the complementary pulse signal of PWM1；PWM2 is the drive pulse signal generated by modulation wave signal 1-d,For the complementary pulse signal of PWM2, the above content is as shown in Figure 2.
The temperature of first full-controlled switch pipe is T1, the temperature of the second full-controlled switch pipe is T2, third full-controlled switch pipe
Temperature be T3, the temperature of the 4th full-controlled switch pipe is T4, the mean temperature of four full-controlled switch pipes is Tavg, environment temperature
For Ta, the threshold value of mean temperature is Ttha.The full-controlled switch pipe of the upper bridge arm and lower bridge arm of full-control type H bridge topological structure is put down
Equal temperature difference is Δ Tver(positive value represents upper bridge arm temperature and is higher than lower bridge arm temperature, and negative value represents lower bridge arm temperature higher than upper bridge arm
Temperature), the average temperature difference of the full-controlled switch pipe of the left bridge arm and right bridge arm of full-control type H bridge topological structure is Δ Thor(positive value
Left bridge arm temperature is represented higher than right bridge arm temperature, negative value represents right bridge arm temperature higher than left bridge arm temperature), upper and lower bridge arm and
The average temperature difference threshold value of left and right bridge arm is Tthb。
Full control H bridge topological structure is when default conditions are run, the first full-controlled switch pipe S1Gate drive signal G1Matched
It is set to PWM1, the second full-controlled switch pipe S2Gate drive signal G2It is configured asThird full-controlled switch pipe S3's
Gate drive signal G3It is configured as4th full-controlled switch pipe S4Gate drive signal G4It is configured as PWM1.
As shown in Figures 3 to 6, the control method packet of the full-control type H bridge topological structure active thermal control of the embodiment of the present invention
Following four is included without the bridge method of operation:
One: the first full-controlled switch pipe S of mode1Gate drive signal G1It is set to zero, the second full-controlled switch pipe S2's
Gate drive signal G2It is configured asThird full-controlled switch pipe S3Gate drive signal G3It is set to zero, the 4th is complete
Control type switching tube S4Gate drive signal G4It is configured as PWM2.
Two: the first full-controlled switch pipe S of mode1Gate drive signal G1It is configured as PWM2, the second full-controlled switch pipe
S2Gate drive signal G2It is set to zero, third full-controlled switch pipe S3Gate drive signal G3It is configured asThe
Four full-controlled switch pipe S4Gate drive signal G4It is set to zero.
Three: the first full-controlled switch pipe S of mode1Gate drive signal G1It is set to zero, the second full-controlled switch pipe S2's
Gate drive signal G2It is set to zero, third full-controlled switch pipe S3Gate drive signal G3It is configured as4th is complete
Control type switching tube S4Gate drive signal G4It is configured as PWM2.
Four: the first full-controlled switch pipe S of mode1Gate drive signal G1It is configured as PWM2, the second full-controlled switch pipe
S2Gate drive signal G2It is configured asThird full-controlled switch pipe S3Gate drive signal G3It is set to zero,
Four full-controlled switch pipe S4Gate drive signal G4It is set to zero.
To avoid bridge arm direct pass phenomenon present in mode three and mode four, according to port voltage usPolar difference, entirely
The gate drive signal of control type switching tube need to be handled by additional logic circuit.
According to the mean temperature T of four full-controlled switch pipesavg, temperature threshold TthaWith Tthb, upper bridge arm and lower bridge arm temperature
Spend poor Δ Tver, left bridge arm and right bridge arm temperature difference Δ ThorRelationship between equal variables, selects the suitable method of operation, can be with
Realize the first full-controlled switch pipe S to full control H bridge topological structure1, the second full-controlled switch pipe S2, third full-controlled switch pipe
S3, the 4th full-controlled switch pipe S4Active temperature control purpose.
Specifically, according to one embodiment of present invention, as shown in fig. 7, the active of above-mentioned full control H bridge topological structure
Temprature control method the following steps are included:
Step 1: judge the mean temperature T of four full-controlled switch pipesavgWhether T is greater thantha.If it is, implementation steps
Two, otherwise continue to run in a manner of H bridge to control entirely.
Step 2: note STmaxFor the highest full-controlled switch pipe of temperature.Judge temperature highest in four full-controlled switch pipes
Switching tube, if STmax=S1, T need to be judged again2Whether T is greater than3, if it has, then step 6 is executed, if it has not, thening follow the steps
Four；If STmax=S2, T need to be judged again1Whether T is greater than4, if it has, then step 6 is executed, if it has not, thening follow the steps three；If
STmax=S3, T need to be judged again1Whether T is greater than4, if it has, then step 4 is executed, if it has not, thening follow the steps five；If STmax=
S4, T need to be judged again2Whether T is greater than3, if it has, then step 3 is executed, if it has not, thening follow the steps five.
Step 3: executive mode one judges Δ TverWhether T is greater thanthb, if it has, then executive mode two, if it has not, then
Continue to execute mode one；After executive mode two, Δ T is judgedverWhether-T is less thanthb, if it has, then executive mode one, if
It is no, then continue to execute mode two.
Step 4: executive mode two judges Δ ThorWhether T is greater thanthb, if it has, then executive mode one, if it has not, then
Continue to execute mode two；After executive mode one, Δ T is judgedhorWhether-T is less thanthb, if it has, then executive mode two, if
It is no, then continue to execute mode one.
Step 5: executive mode three judges Δ TverWhether T is greater thanthb, if it has, then executive mode four, if it has not, then
Continue to execute mode three；After executive mode four, Δ T is judgedverWhether-T is less thanthb, if it has, then executive mode three, if
It is no, then continue to execute mode four.
Step 6: executive mode four judges Δ ThorWhether T is greater thanthb, if it has, then executive mode three, if it has not, then
Continue to execute mode four；After executive mode three, Δ T is judgedhorWhether-T is less thanthb, if it has, then executive mode four, if
It is no, then continue to execute mode three.
Process or method described in the embodiment of the present invention can not be according to the sequences discussed, including according to involved in
Function by it is basic simultaneously in the way of or in the opposite order execute function.In addition, term " first ", " second ", " third ",
It is special that " the 4th " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicates indicated technology
The quantity of sign defines the first ", " second " as a result, " third ", the feature of " the 4th " can be expressed or implicitly include at least
One this feature.
In addition, " PID controller " described in the present invention be construed as include ratio, differential, integration control and its
Various combining forms.
In description in the present invention, the description of reference term " embodiment ", " example " etc. mean combine the embodiment or
Specific features, structure or the feature of example description are included at least one embodiment or example of the invention.In this explanation
In book, identical embodiment or example must be directed to the schematic illustration ratio of above-mentioned term.And the specific spy of description
Sign, structure or feature can be combined in any suitable manner in any one or multiple embodiment or examples again.
In conclusion by the temperature for acquiring four full-controlled switch pipes and being compared, then according to four full-control types
The mean temperature T of switching tubeavg, temperature threshold TthaWith Tthb, upper and lower bridge arm full-controlled switch pipe average temperature difference Δ
Tver, left and right bridge arm full-controlled switch pipe temperature difference Δ ThorBetween relationship judged, to select full-control type H bridge
The method of operation, the full-controlled switch pipe S of full control H bridge topological structure can be realized in normal course of operation1、S2、S3、
S4Temperature stress relative equilibrium improve operational reliability and the service life of system to reduce the failure rate of converter or system,
There is stronger initiative and freedom degree compared with traditional passive heat radiation cooling system, and the present invention does not have in structure
Additional circuit or component are introduced, does not increase additional hardware cost or loss.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to structure of the invention
Think and range is defined, under the premise of not departing from design scheme of the present invention, the engineers and technicians in this field are to the present invention
The all variations and modifications made of technical solution, bold and unrestrained protection scope should all be fallen into, in the claimed technology of the present invention
Hold, is all described in the claims.
Claims (7)
1. the novel active temperature control strategy for controlling H bridge topological structure entirely, which is characterized in that novel active temperature control system
System includes full control H bridge topological structure, active temperature controller and PWM signal generator；
The full control H bridge topological structure port voltage is us, circuit element includes the first full-controlled switch pipe S1, the second full-control type
Switching tube S2, third full-controlled switch pipe S3, the 4th full-controlled switch pipe S4, and corresponding with corresponding full-controlled switch pipe
One diode D1, the second diode D2, third diode D3, the 4th diode D4；
The active temperature controller, which is characterized in that be made of PID controller, temperature detecting module；
The temperature detecting module a, which is characterized in that temperature sensor is installed on each full-controlled switch pipe, for detecting
The shell temperature information of each full-controlled switch pipe；
The PWM signal generator, which is characterized in that for generating the driving signal of the full-controlled switch pipe.
2. controlling H bridge topological structure entirely according to claim 1, which is characterized in that the full-control type of the full control H bridging parallel operation is opened
Guan Guanxu is controlled by independent driving signal, and the converter is enable to work under a variety of methods of operation, described upper and lower
The power switch of bridge arm is configured to complementary on state to prevent bridge arm direct pass from short circuit occurs.
3. the method for operation according to claim 2, which is characterized in that the configuration difference according to driving signal can be divided into mode
One, mode two, mode three and mode four totally four kinds without the bridge method of operation；
The mode one, which is characterized in that the first full-controlled switch pipe S1Gate drive signal G1It is set to zero, it is described
Second full-controlled switch pipe S2Gate drive signal G2It is configured asThe third full-controlled switch pipe S3Grid
Driving signal G3It is set to zero, the 4th full-controlled switch pipe S4Gate drive signal G4It is configured as PWM2；
The mode two, which is characterized in that the first full-controlled switch pipe S1Gate drive signal G1PWM2 is configured as,
The second full-controlled switch pipe S2Gate drive signal G2It is set to zero, the third full-controlled switch pipe S3Grid drive
Dynamic signal G3It is configured asThe 4th full-controlled switch pipe S4Gate drive signal G4It is set to zero；
The mode three, which is characterized in that the first full-controlled switch pipe S1Gate drive signal G1It is set to zero, it is described
Second full-controlled switch pipe S2Gate drive signal G2It is set to zero, the third full-controlled switch pipe S3Gate driving letter
Number G3It is configured asThe 4th full-controlled switch pipe S4Gate drive signal G4It is configured as PWM2；
The mode four, which is characterized in that the first full-controlled switch pipe S1Gate drive signal G1PWM2 is configured as,
The second full-controlled switch pipe S2Gate drive signal G2It is configured asThe third full-controlled switch pipe S3's
Gate drive signal G3It is set to zero, the 4th full-controlled switch pipe S4Gate drive signal G4It is set to zero.
4. controlling H bridge topological structure entirely according to claim 1, which is characterized in that the shell temperature of four full-controlled switch pipes
When mean temperature is higher than the threshold value of setting, then the method for operation of the full control H bridge is switched to accordingly without the bridge method of operation.
5. controlling H bridge topological structure entirely according to claim 1, which is characterized in that the upper bridge arm and lower bridge arm or left bridge arm
When being more than the threshold value of setting with the temperature difference of right bridge arm full-controlled switch pipe, dual structure switching is carried out to no bridge method of operation, i.e.,
Mode one and the switching of mode two, mode three and mode four switch.
6. controlling H bridge topological structure entirely according to claim 1, which is characterized in that the full-controlled switch pipe can be IGBT
(insulated gate bipolar transistor) or IGCT (integrated gate commutated thyristor) or MOSFET (electric power field effect transistor).
7. according to modulation system described in claim 3-5 any one, which is characterized in that the process or method can not press
According to the sequence, function can be executed in the way of identical, opposite or random order according to related function.
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| CN111049414A (en) * | 2020-01-02 | 2020-04-21 | 中国矿业大学(北京) | Active temperature control strategy of full-control H-bridge converter working periodically and uniformly in turn |
| CN112910282A (en) * | 2021-02-03 | 2021-06-04 | 郑州轻工业大学 | High-voltage permanent magnet motor drive rectifier loss optimization method based on temperature control |
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| US7499290B1 (en) * | 2004-05-19 | 2009-03-03 | Mississippi State University | Power conversion |
| CN106329950A (en) * | 2015-07-01 | 2017-01-11 | 南京南瑞继保电气有限公司 | Driving signal modulation method of modular multilevel converter and fault isolation method |
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| CN111049414A (en) * | 2020-01-02 | 2020-04-21 | 中国矿业大学(北京) | Active temperature control strategy of full-control H-bridge converter working periodically and uniformly in turn |
| CN112910282A (en) * | 2021-02-03 | 2021-06-04 | 郑州轻工业大学 | High-voltage permanent magnet motor drive rectifier loss optimization method based on temperature control |
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