CN107565842A - A kind of efficiently redundant parallel pure electric automobile frequency converter and its control method - Google Patents
A kind of efficiently redundant parallel pure electric automobile frequency converter and its control method Download PDFInfo
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- CN107565842A CN107565842A CN201710628504.1A CN201710628504A CN107565842A CN 107565842 A CN107565842 A CN 107565842A CN 201710628504 A CN201710628504 A CN 201710628504A CN 107565842 A CN107565842 A CN 107565842A
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Abstract
The present invention relates to a kind of efficiently redundant parallel pure electric automobile frequency converter and its control method, the frequency converter to be made up of multiple converter units in parallel, the controller of the frequency converter connection pure electric automobile；When frequency converter load is relatively low, certain several converter unit that controller is distributed in frequency converter according to load condition work, the normal work of system can not only be met, also improve overall efficiency simultaneously, reduce unnecessary loss, in some special cases, some in multiple converter units breaks down, and has no effect on the normal operation of electric automobile.
Description
Technical field
The present invention relates to electric vehicle engineering, more particularly to a kind of efficiently redundant parallel pure electric automobile frequency converter and its control
Method processed.
Background technology
Electric car is a kind of new and high technology, and it combines automobile, motor, battery, aerodynamics, computer, automatic control
The newest research results of system, high polymer material and each subject of ergonomic.Therefore, electric car also carries out high-new skill into various countries
One of key areas for art competition.China is in the eighties, in succession on Shanghai, Zhengzhou, Wuhan, Wenzhou, Shenzhen and other places not
Few unit has carried out research work, and manufactures experimently out sample car.Since 21 century, I proposes " energy-conservation and new-energy automobile war
Slightly ", government pays much attention to the research and development and industrialization of new-energy automobile.In the case where national policy is advocated and is supported, China various regions are relevant
Research and development of products and Demonstration And Extension of the energy-conservation with the automobile of new energy are to surge forward.New-energy automobile production in 2014
78499, sales volume 7476, increase by 3.5 times and 3.2 times than last year.New-energy automobile yield in 2015 is up to 340471, sales volume
331092, wherein pure electric vehicle type volume of production and marketing is respectively completed 254633 and 247822；Plug-in hybrid electrically vehicle production
Sales volume is respectively completed 85838 and 85630.Only the first half of the year in 2016, new-energy automobile just produce 17.7 ten thousand, sales volume
17.0 ten thousand, increase by 125% and 126.9% respectively on year-on-year basis.Wherein pure electric automobile production and marketing is respectively completed 13.4 ten thousand and 12.6
Ten thousand；Plug-in hybrid electrically vehicle volume of production and marketing is respectively completed 4.4 ten thousand and 4.3 ten thousand.
Electric automobile mainly divides several parts：Battery, frequency converter, motor, electronic control unit (ECU), overall structure
Block diagram is as shown in Figure 1.One of core component of electric automobile is frequency converter, and the performance and security reliability of vehicle are played very
Important effect.Electric automobile is the vehicle that vehicle advance is driven with motor.The basic functional principle of electric automobile be by
Battery or other devices that can produce power supply or electric energy provide electric current, and galvanic current source is become into energy by frequency converter
The three-phase alternating-current supply that enough drive motors rotate, the change of motor speed moment of torsion etc. is realized by adjustment parameter, is adjusted
Motor rotation, then drive automobile to advance by power drive system and travel.But according to inverter load rate and efficiency curve
(such as Fig. 2) is understood, when at low load, the efficiency comparison of frequency converter is low, reduces utilization rate, and when frequency converter breaks down
When, system will be unable to normal work.
The content of the invention
In order to solve the above-mentioned technical problem, there is provided the pure electric automobile that a kind of efficiency high, operational reliability are strong, redundancy rate is high
Frequency converter and its control method, the present invention provide following technical scheme：
A kind of efficiently redundant parallel pure electric automobile frequency converter and its control method, the frequency converter is by n change in parallel
Frequency unit forms, and the converter unit be connected with the controller of pure electric automobile, the rated power of each converter unit be Pm,
The real-time general power of frequency converter is Ps：
As Ps≤Pm, controller controls n converter unit to take turns to operate a period of time；
Work as Pm<Ps≤2*Pm, general power Ps are assigned to two converter units, as [Ps-Pm]≤1/2*Pm, general power Ps
Assign to the converter unit of two work；As [Ps-Pm]>During 1/2*Pm, preceding 1 converter unit is fully loaded with work, the 2nd frequency conversion list
Member is operated under Ps-Pm power, while each two converter unit takes turns to operate a period of time；
…
As (k-1) * Pm<Ps≤k*Pm, general power Ps are assigned to k converter unit, as [Ps- (k-1) * Pm]≤1/2*Pm
When, general power assigns to the converter unit of k work；As [Ps- (k-1) * Pm]>During 1/2*Pm, preceding (k-1) individual converter unit is expired
Work is carried, k-th of converter unit is operated under [Ps- (k-1) * Pm] power；As k≤n/2, per k converter unit work in turn
Make a period of time, work as k>During n/2, after k converter unit work a period of time, the 1st frequency conversion is replaced by+1 converter unit of kth
Cell operation, so circulation；
When fully loaded, n converter unit works simultaneously.
The Redundant Control that the present invention cooperates using multi-tool block, simple in construction, convenient for production and cost of manufacture
Low, operational reliability is strong；In rated load section, efficiency improves；Multigroup redundancy can be provided, when a certain group of inverter damages
When, it is ensured that system can still be run, and improve redundancy rate.
Brief description of the drawings
Fig. 1, electric automobile overall structure block diagram.
Fig. 2, traditional frequency conversion device load factor β and efficiency eta curve.
Fig. 3, the electric automobile overall structure block diagram using frequency converter of the invention.
Fig. 4, Ps<Mode of operation during Pm.
Fig. 5, Pm<Mode of operation 1 during Ps≤2*Pm.
Fig. 6, Pm<Mode of operation 2 during Ps≤2*Pm.
Fig. 7, a kind of embodiment of the present invention and the efficiency comparison curve 1 of traditional frequency conversion device.
Fig. 8, a kind of embodiment of the present invention and the efficiency comparison curve 2 of traditional frequency conversion device.
Embodiment
Operating efficiency is improved compared to traditional frequency conversion device in order to illustrate that more converter units cooperate, below with one
The new type inverter that 100KW traditional frequency conversion device and 5 20KW submodule cooperate compares.
The converter unit is connected with the controller of pure electric automobile, and the rated power of each converter unit is Pm, become
The real-time general power of frequency device is Ps：
As Ps≤Pm, as shown in figure 4, controller controls 5 converter units to take turns to operate a period of time, now single change
The operating efficiency of frequency module and the operating efficiency of traditional frequency conversion device are more as shown in Figure 7；
Work as Pm<Ps≤2*Pm, general power Ps are assigned to two converter units, wherein, as shown in figure 5, mode of operation 1 is to work as
During [Ps-Pm]≤1/2*Pm, general power Ps assigns to the converter unit of two work, as shown in fig. 6, mode of operation two is as [Ps-
Pm]>During 1/2*Pm, preceding 1 converter unit is fully loaded with work, and the 2nd converter unit is operated under Ps-Pm power, while each two
Converter unit takes turns to operate a period of time, and now the comparison of efficiency curve and traditional frequency conversion device is as shown in Figure 8；
Work as 2*Pm<Ps≤3*Pm, general power Ps are assigned to 3 converter units, as [Ps-2*Pm]≤1/2*Pm, total work
Rate assigns to the converter unit of 3 work；As [Ps-2*Pm]>During 1/2*Pm, preceding 2 converter units are fully loaded with work, the 3rd change
Frequency cell operation is under [Ps- (3-1) * Pm] power；After 3 converter unit work a period of times, replaced by the 4th converter unit
1st converter unit work, so circulation；
Work as 3*Pm<Ps≤4*Pm, general power Ps are assigned to 4 converter units, as [Ps-3*Pm]≤1/2*Pm, total work
Rate assigns to the converter unit of 4 work；As [Ps-3*Pm]>During 1/2*Pm, preceding 3 converter units are fully loaded with work, the 4th change
Frequency cell operation is under [Ps-3*Pm] power；After 4 converter units work a period of times, by the 4+1 converter unit instead of the
1 converter unit work, so circulation；
Work as 4*Pm<Ps≤5*Pm, general power Ps are assigned to 5 converter units, as [Ps-4*Pm]≤1/2*Pm, total work
Rate assigns to the converter unit of 5 work；As [Ps-4*Pm]>During 1/2*Pm, preceding 4 converter units are fully loaded with work, the 5th change
Frequency cell operation is under [Ps-4*Pm] power；
When fully loaded, 5 converter units work simultaneously.
Efficiency comparison figure shown in analysis chart 7-8 understands, traditional frequency converter at low load, the efficiency comparison of frequency conversion
Low, embodiments of the invention then have efficient efficiency, are especially become apparent in the raising of low power section internal efficiency.And this
When some or some converter units break down in frequency converter, system can work on the embodiment of invention, improve fault-tolerant
Rate, it is unlikely to make vehicle the failure cast anchor occur, and taking turns to operate for each converter unit improves system lifetim.
Using it is above-mentioned according to desirable embodiment of the present invention as enlightenment, it is complete by above-mentioned description, relevant staff
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention'.This invention it is technical
Scope is not limited to the content on specification, it is necessary to determines its technical scope according to right.
Claims (1)
1. a kind of efficiently redundant parallel pure electric automobile frequency converter and its control method, the frequency converter is by n frequency conversion in parallel
Unit is formed, and the converter unit is connected with the controller of pure electric automobile, and the rated power of each converter unit is Pm, become
The real-time general power of frequency device is Ps, it is characterised in that：
As Ps≤Pm, controller controls n converter unit to take turns to operate a period of time；
Work as Pm<Ps≤2*Pm, general power Ps are assigned to two converter units, and as [Ps-Pm]≤1/2*Pm, general power Ps divides equally
To the converter unit of two work；As [Ps-Pm]>During 1/2*Pm, preceding 1 converter unit is fully loaded with work, the 2nd converter unit work
Make under Ps-Pm power, while each two converter unit takes turns to operate a period of time；
…
As (k-1) * Pm<Ps≤k*Pm, general power Ps are assigned to k converter unit, as [Ps- (k-1) * Pm]≤1/2*Pm,
General power assigns to the converter unit of k work；As [Ps- (k-1) * Pm]>During 1/2*Pm, preceding (k-1) individual converter unit is fully loaded with
Work, k-th of converter unit are operated under [Ps- (k-1) * Pm] power；As k≤n/2, taken turns to operate per k converter unit
For a period of time, k is worked as>During n/2, after k converter unit work a period of time, the 1st frequency conversion list is replaced by+1 converter unit of kth
Member work, so circulation；
When fully loaded, n converter unit works simultaneously.
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| CN201710628504.1A CN107565842B (en) | 2017-07-28 | 2017-07-28 | Control method of high-efficiency redundant parallel pure electric vehicle frequency converter |
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| CN201710628504.1A CN107565842B (en) | 2017-07-28 | 2017-07-28 | Control method of high-efficiency redundant parallel pure electric vehicle frequency converter |
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| CN107565842B CN107565842B (en) | 2020-03-17 |
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| CN101179248A (en) * | 2006-11-10 | 2008-05-14 | 马龙汽车株式会社 | Motor driving device and method |
| CN101488668A (en) * | 2008-04-30 | 2009-07-22 | 江苏南自通华新能源电力有限公司 | Reconfigurable distributed access grid-connected inverter |
| CN101982924A (en) * | 2010-10-27 | 2011-03-02 | 徐志瑶 | Design method for variable-frequency driven double-rated frequency three-phase motor |
| CN102255536A (en) * | 2011-07-18 | 2011-11-23 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic three-phase micro-inverter system and method for promoting conversion efficiency thereof |
| CN102468766A (en) * | 2010-11-10 | 2012-05-23 | 永济新时速电机电器有限责任公司 | Combined frequency converter |
| CN203243254U (en) * | 2013-04-28 | 2013-10-16 | 苏州市职业大学 | Novel control circuit of solar photovoltaic power generation |
| CN103457531A (en) * | 2013-09-11 | 2013-12-18 | 国电南京自动化股份有限公司 | Parallel control realization method based on cascade high-voltage inverter load distribution |
| CN104167907A (en) * | 2014-08-28 | 2014-11-26 | 辽宁荣信电气传动技术有限责任公司 | Multi-machine parallel control topological structure based on high-voltage inverters |
| CN205081669U (en) * | 2015-10-21 | 2016-03-09 | 辽宁荣信电气传动技术有限责任公司 | Parallelly connected configuration topological structure of n+2 based on high -voltage inverter |
-
2017
- 2017-07-28 CN CN201710628504.1A patent/CN107565842B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179248A (en) * | 2006-11-10 | 2008-05-14 | 马龙汽车株式会社 | Motor driving device and method |
| CN101488668A (en) * | 2008-04-30 | 2009-07-22 | 江苏南自通华新能源电力有限公司 | Reconfigurable distributed access grid-connected inverter |
| CN101982924A (en) * | 2010-10-27 | 2011-03-02 | 徐志瑶 | Design method for variable-frequency driven double-rated frequency three-phase motor |
| CN102468766A (en) * | 2010-11-10 | 2012-05-23 | 永济新时速电机电器有限责任公司 | Combined frequency converter |
| CN102255536A (en) * | 2011-07-18 | 2011-11-23 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic three-phase micro-inverter system and method for promoting conversion efficiency thereof |
| CN203243254U (en) * | 2013-04-28 | 2013-10-16 | 苏州市职业大学 | Novel control circuit of solar photovoltaic power generation |
| CN103457531A (en) * | 2013-09-11 | 2013-12-18 | 国电南京自动化股份有限公司 | Parallel control realization method based on cascade high-voltage inverter load distribution |
| CN104167907A (en) * | 2014-08-28 | 2014-11-26 | 辽宁荣信电气传动技术有限责任公司 | Multi-machine parallel control topological structure based on high-voltage inverters |
| CN205081669U (en) * | 2015-10-21 | 2016-03-09 | 辽宁荣信电气传动技术有限责任公司 | Parallelly connected configuration topological structure of n+2 based on high -voltage inverter |
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