CN110022114A - A kind of electric machine controller capacitor low-temperature prewarming method and system - Google Patents
A kind of electric machine controller capacitor low-temperature prewarming method and system Download PDFInfo
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- CN110022114A CN110022114A CN201910397829.2A CN201910397829A CN110022114A CN 110022114 A CN110022114 A CN 110022114A CN 201910397829 A CN201910397829 A CN 201910397829A CN 110022114 A CN110022114 A CN 110022114A
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- machine controller
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- 239000003990 capacitor Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012802 pre-warming Methods 0.000 title claims abstract description 10
- 230000003068 static effect Effects 0.000 claims abstract description 10
- 230000001360 synchronised effect Effects 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a kind of electric machine controller capacitor low-temperature prewarming method and system, the method includes the steps: it include: the circuit board temperature for detecting electric machine controller；When circuit board temperature is lower than normal startup threshold, first motor is kept to remain static, and backward permanent magnet synchronous motor to be controlled applies the positive direct-axis current being gradually increased；When the direct-axis current of application reaches threshold value, it is switched to normal mode starting electric machine controller, the present invention can absorb this characteristic of generated AC compounent during electric current increases using capacitor, so that the electric energy generated is converted to electric energy, to carry out the pre-heat treatment to capacitor, then increases the capacitance of capacitor, reduce the size of ripple voltage, the stability of guarantee system operation is very ingenious.
Description
Technical field
The invention belongs to motor control technology field more particularly to a kind of electric machine controller capacitor low-temperature prewarming methods.
Background technique
The generally asynchronous machine of new energy vehicle motor system early application is high with the development of permanent magnet synchronous motor
The advantages that effect energy conservation, power factor is high, it is widely used in new-energy automobile.If on the electric machine controller of motor compressor
Common electrolytic capacitor, in the lower such as minus 20 degrees of temperature, because of the too low bring capacitor activity decline of temperature, capacitor's capacity meeting
Decline even lower close to 50%.It was found that, when lower temperature directly initiates electric machine controller, the driving voltage of IGBT
There can be very big voltage ripple, the absorption to ripple current can be reduced due to capacitor's capacity, to increase capacitor
Ripple voltage.When voltage ripple is big, harmonic wave, modulation etc. can be generated in the circuit of controller, interference suppressor is to direct current
The sampling of pressure, to interfere control of the electric machine controller to motor.
It is typical such as motor compressor, electric rotating using existing Vehicular electric new energy vehicle motor system as research object
To etc., existing automobile-used new energy vehicle motor system does not consider capacitor Preheating at lower temperature (such as below minus 20 degrees),
Biggish ripple current and ripple voltage can be generated during cold-starting, ripple voltage and ripple current refer to voltage and current
In higher harmonic component, will lead to the variation of electric current and voltage magnitude, when ripple value is more than that capacitor or power device can be held
When the limit received, the damage of Primary Component may cause.
Summary of the invention
It is of the existing technology in order to solve the problems, such as, the present invention provide a kind of electric machine controller capacitor low-temperature prewarming method and
System can preheat its capacitor before electric machine controller normally starts, increase capacitance, reduce ripple voltage.
The technical problem to be solved by the present invention is to what is be achieved through the following technical solutions:
In a first aspect, providing a kind of electric machine controller capacitor low-temperature prewarming method, described method includes following steps:
Detect the circuit board temperature of electric machine controller；
When circuit board temperature is lower than normal startup threshold, first motor is kept to remain static, and it is backward to be controlled
Permanent magnet synchronous motor applies the positive direct-axis current being gradually increased；
When the direct-axis current of application reaches threshold value, it is switched to normal mode starting electric machine controller.
With reference to first aspect, further, the threshold value of the direct-axis current of application is the normal starting current of electric machine controller
3/4ths.
With reference to first aspect, further, the size of current when direct-axis current of application is operated normally no more than motor.
Second aspect provides a kind of electric machine controller capacitor low-temperature preheating system, comprising:
Detection module: for detecting the circuit board temperature of electric machine controller；
It is powered on control module: for first motor being kept to be in static shape when circuit board temperature is lower than normal startup threshold
State, and backward permanent magnet synchronous motor to be controlled applies the positive direct-axis current being gradually increased；
When the direct-axis current of application reaches threshold value, it is switched to normal mode starting electric machine controller.
In conjunction with second aspect, further, the power-up control module further includes current threshold control module: for that will apply
The threshold value of the direct-axis current added is 3/4ths of the normal starting current of electric machine controller.
In conjunction with second aspect, further, the direct-axis current that the power-up control module is applied is just no more than motor
Often size of current when operation.
The third aspect provides a kind of electric machine controller capacitor low-temperature preheating system, including memory and processor；
The processor is for being operated according to described instruction to execute the side according to first aspect any one
Method step.
Have the beneficial effect that: the present invention is by before permanent magnet synchronous motor to be controlled starts, by applying gradually to it
Increased d shaft current id, so that motor can have phase current generation on three-phase IGBT under static state, can be absorbed using capacitor
Electric current increase during caused by AC compounent this characteristic so that the electric energy generated is converted to electric energy, thus to capacitor into
Row the pre-heat treatment then increases the capacitance of capacitor, reduces the size of ripple voltage, and the method seems and uncomplicated, but very
It is ingenious, guarantee the stability of system operation.
Detailed description of the invention
Fig. 1 is current component schematic diagram in the present invention；
Fig. 2 is space vector of voltage figure in the present invention；
Fig. 3 is the curve graph of the direct-axis current gone out given in the present invention；
Fig. 4 is three-phase current waveform diagram in the present invention；
Fig. 5 is hardware circuit simulation drawing in the present invention.
Specific embodiment
In order to further describe technical characterstic and effect of the invention, below in conjunction with the drawings and specific embodiments to this hair
It is bright to be described further.
As shown in Figs. 1-5, the technical solution adopted in the present invention is as follows:
The present invention is by passing through the d shaft current gradually increased to its application before permanent magnet synchronous motor starting to be controlled
id, pass through PARK variation and SVPWM (Space vector pulse width modulation, space vector pulse width modulation)
Make motor that can have phase current generation on three-phase IGBT under static state after control, when a current increases caused by friendship
Flow component can be converted to thermal energy by capacitive absorption, generated electric energy and heat to capacitor, so that the pre-heat treatment is carried out to capacitor, after
And increase the capacitance of capacitor, increase the absorption to ripple current, inhibits the size of ripple voltage, so that when normally starting motor
Controlling voltage can be relatively stable, guarantees the normal starting and stable operation of controller.
To motor apply direct-axis current when, added electric current no more than motor operate normally when size of current,
It prevents motor from can act, generates q axis component so as to cause increased electric current, eventually lead to the failure of capacitor preheating.In the present invention
The final size of the electric current applied is 3/4ths of the normal starting current of electric machine controller.
A kind of electric machine controller capacitor low-temperature preheating system provided in an embodiment of the present invention, can be used for the above-mentioned electricity of load and execution
Machine controller capacitor low-temperature prewarming method, comprising:
Detection module: for detecting the circuit board temperature of electric machine controller；
It is powered on control module: for first motor being kept to be in static shape when circuit board temperature is lower than normal startup threshold
State, and backward permanent magnet synchronous motor to be controlled applies the positive direct-axis current being gradually increased；
When the direct-axis current of application reaches threshold value, it is switched to normal mode starting electric machine controller.
A kind of electric machine controller capacitor low-temperature preheating system provided in an embodiment of the present invention, it may also is that
Including memory and processor；
The processor is for being operated according to described instruction to execute the side according to first aspect any one
Method step.
The principle of the present invention is as follows:
The voltage equation of motor can indicate are as follows:
When motor remains static, voltage equation can be write a Chinese character in simplified form are as follows:
Wherein, VdAnd VqIndicate d-q shaft voltage；idAnd iqIndicate d-q (d-axis-quadrature axis) shaft current；Rs indicates stator resistance
Value, ωreFor motor speed, LdFor d-axis inductance, LqFor axis inductor, KeFor magnetic linkage value.
After Park coordinate inversion, d-q shaft voltage can be converted to alpha-beta shaft voltage, may be expressed as:
Wherein, θ is the angle of d axis and α axis；Use VαAnd VβIndicate component of the voltage vector on alpha-beta axis.
Forward direction d shaft current is given under motor stationary state, gives q shaft current iqIt is 0；
V at this timed> 0；Vq=0；
To judge sector where voltage vector, U is defineda、UbAnd UcThree variables:
Re-define three variables As, B and C；According to existing SVPWM (Space vector pulse width
Modulation, space vector pulse width modulation) method:
Work as UaWhen > 0, A=1；Work as UbWhen > 0, B=1；Work as UcWhen > 0, C=1；
Sector where voltage vector can be indicated by variables A, B, C are as follows:
N=A+2B+4C；
Since warm-up phase motor remains static, and d shaft current is only given, therefore θ is 0, in q axis no current and voltage
Component；Therefore U can be obtainedα> 0；Uβ=0；
Therefore U can be obtainedα> 0；Uβ=0；According to sector decisive equation among the above, N=2 at this time；Voltage vector is in the
VI sector, the switching sequence of three-phase IGBT are bridge work in U phase, and bridge works under V phase and W phase.
As shown in figure 3, linearly increasing d shaft current id；
As shown in figure 4, to increase d shaft current, the generated phase current waveform on three-phase IGBT；
As shown in Figure 5, when increasing d shaft current, on three-phase bridge road generated three-phase current be gradually increase it is straight
Flow, when size of current increases, DC current can generate the ripple current of high fdrequency component, this portion of electrical current can consume on capacitor
It dissipates, by capacitive absorption, this part electric energy can be converted into thermal energy, for heating to capacitor.
But d shaft current idIt is given it is noted that size of current when operating normally no more than motor, prevents motor meeting
Movement causes increased electric current to generate q axis component, the failure for causing capacitor to preheat.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of electric machine controller capacitor low-temperature prewarming method characterized by comprising
Detect the circuit board temperature of electric machine controller；
When circuit board temperature is lower than normal startup threshold, first motor is kept to remain static, and backward permanent magnetism to be controlled
Synchronous motor applies the positive direct-axis current being gradually increased；
When the direct-axis current of application reaches threshold value, it is switched to normal mode starting electric machine controller.
2. a kind of electric machine controller capacitor low-temperature prewarming method according to claim 1, which is characterized in that the d-axis of application
The threshold value of electric current is 3/4ths of the normal starting current of electric machine controller.
3. a kind of electric machine controller capacitor low-temperature prewarming method according to claim 1, which is characterized in that the d-axis of application
Size of current when electric current is operated normally no more than motor.
4. a kind of electric machine controller capacitor low-temperature preheating system characterized by comprising
Detection module: for detecting the circuit board temperature of electric machine controller；
It is powered on control module: for first motor being kept to remain static when circuit board temperature is lower than normal startup threshold, and
Backward permanent magnet synchronous motor to be controlled applies the positive direct-axis current being gradually increased；
When the direct-axis current of application reaches threshold value, it is switched to normal mode starting electric machine controller.
5. a kind of electric machine controller capacitor low-temperature preheating system according to claim 4, it is characterised in that:
The power-up control module further includes current threshold control module: the threshold value of the direct-axis current for that will apply is motor control
3/4ths of the normal starting current of device processed.
6. a kind of electric machine controller capacitor low-temperature preheating system according to claim 4, it is characterised in that:
The size of current when direct-axis current that the power-up control module is applied is operated normally no more than motor.
7. a kind of electric machine controller capacitor low-temperature preheating system, which is characterized in that including memory and processor；
The processor is used to operated according to described instruction to execute method according to claim 1 to 3
Step.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910397829.2A CN110022114A (en) | 2019-05-14 | 2019-05-14 | A kind of electric machine controller capacitor low-temperature prewarming method and system |
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| CN201910397829.2A CN110022114A (en) | 2019-05-14 | 2019-05-14 | A kind of electric machine controller capacitor low-temperature prewarming method and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204850A (en) * | 2021-12-08 | 2022-03-18 | 浙江吉利控股集团有限公司 | A kind of electric compressor low temperature preheating method and equipment |
| WO2024032318A1 (en) * | 2022-08-11 | 2024-02-15 | 南京泉峰科技有限公司 | Electronic combination, battery pack, and electric tool and charging control method therefor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2782971Y (en) * | 2003-11-28 | 2006-05-24 | 刘宝成 | Low temperature automatic start preheating device for motor, vehicle |
| CN101364780A (en) * | 2007-08-06 | 2009-02-11 | 株式会社丰田自动织机 | Method and apparatus for controlling electric motor |
| CN102627073A (en) * | 2011-02-04 | 2012-08-08 | 株式会社日立制作所 | Control device for vehicle electric drive motor and vehicle with the same |
| US20140008998A1 (en) * | 2012-07-05 | 2014-01-09 | Visteon Global Technologies, Inc. | Method for operating an inverter of an electrical refrigerant compressor making use of dc link electrolyte capacitors |
-
2019
- 2019-05-14 CN CN201910397829.2A patent/CN110022114A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2782971Y (en) * | 2003-11-28 | 2006-05-24 | 刘宝成 | Low temperature automatic start preheating device for motor, vehicle |
| CN101364780A (en) * | 2007-08-06 | 2009-02-11 | 株式会社丰田自动织机 | Method and apparatus for controlling electric motor |
| CN102627073A (en) * | 2011-02-04 | 2012-08-08 | 株式会社日立制作所 | Control device for vehicle electric drive motor and vehicle with the same |
| US20140008998A1 (en) * | 2012-07-05 | 2014-01-09 | Visteon Global Technologies, Inc. | Method for operating an inverter of an electrical refrigerant compressor making use of dc link electrolyte capacitors |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204850A (en) * | 2021-12-08 | 2022-03-18 | 浙江吉利控股集团有限公司 | A kind of electric compressor low temperature preheating method and equipment |
| WO2024032318A1 (en) * | 2022-08-11 | 2024-02-15 | 南京泉峰科技有限公司 | Electronic combination, battery pack, and electric tool and charging control method therefor |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20200605 Address after: 246500 Hongye Road, Susong Economic Development Zone, Anqing City, Anhui Province Applicant after: Anhui Shouzhi New Energy Technology Co.,Ltd. Applicant after: Shanghai Shouzhi New Energy Technology Co., Ltd Address before: 246500 Hongye Road, Susong Economic Development Zone, Anqing City, Anhui Province Applicant before: Anhui Shouzhi New Energy Technology Co.,Ltd. |
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Application publication date: 20190716 |
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