CN106357102B - Busbar voltage control method for brshless DC motor driving frequency converter - Google Patents
Busbar voltage control method for brshless DC motor driving frequency converter Download PDFInfo
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- CN106357102B CN106357102B CN201610873276.XA CN201610873276A CN106357102B CN 106357102 B CN106357102 B CN 106357102B CN 201610873276 A CN201610873276 A CN 201610873276A CN 106357102 B CN106357102 B CN 106357102B
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- voltage
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- value
- brshless
- ratio
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
Abstract
The invention discloses a kind of busbar voltage control methods for brshless DC motor driving frequency converter, include the following steps, open PFC；It sets target voltage saturation factor Ratio_target and reads actual bus voltage value Ed；Virtual voltage saturation factor Ratio_v_e is calculated；Target bus voltage value Ed_target is calculated；Adjust PFC；Change actual bus voltage value Ed to level off to target bus voltage value Ed_target.The busbar voltage control method can adjust in real time voltage according to the load of motor.
Description
Technical field
The present invention relates to brshless DC motors to drive Frequency Converter Control technical field, is especially a kind of for brushless direct-current
The busbar voltage control method of motor driven frequency converter.
Background technique
In the sine wave drive of brshless DC motor (hereinafter referred to as motor), motor generally is improved using PFC technology
Busbar voltage (hereinafter referred to as voltage).Under normal circumstances, PFC is first opened, the raising or load then as motor speed increase
Add, power of motor is also gradually increased, and phase voltage also increases with it.When phase voltage increasing above supply voltage the case where, reach
To voltage-saturated condition, i.e., no matter how LOAD FREQUENCY changes, which all keeps constant constant.When motor is in higher load condition
When lower work, which has obtained effective utilization, and the utilization rate of voltage is higher.And when motor uses under low load condition
When, it is only necessary to lower voltage can work normally, this not only causes the waste of the voltage, but also will lead to power device
Thermal losses increase, the heat dissipation not only bad for frequency converter leads to problem of temperature rise, next is unfavorable for the reduction of system energy consumption.Cause
This, for these reasons, it would be highly desirable to need a kind of busbar voltage control method for brshless DC motor driving frequency converter, the mother
Line voltage control method can adjust in real time voltage according to the load of motor, to solve the above problems.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of busbar voltage for brshless DC motor driving frequency converter
Control method, the busbar voltage control method can adjust in real time voltage according to the load of motor.
The technical scheme is that providing a kind of busbar voltage controlling party for brshless DC motor driving frequency converter
Method includes the following steps,
(1), PFC is opened；
(2), it sets target voltage saturation factor Ratio_target and reads actual bus voltage value Ed；
(3), virtual voltage saturation factor Ratio_v_e is calculated；
(4), target bus voltage value Ed_target is calculated；
(5), PFC is adjusted；
(6), change actual bus voltage value Ed to level off to target bus voltage value Ed_target.
The step (3) instructs Vq and DC voltage Ed it may also is that reading d shaft voltage instruction Vd, q shaft voltage,
Above three value is substituted intoCalculate virtual voltage saturation factor Ratio_v_e.
The step (4) it may also is that a, by virtual voltage saturation factor Ratio_v_e and target voltage saturation factor
Ratio_target is divided by, and obtains a ratio P；B, it 1 subtracts ratio P and obtains a biasing coefficient C by PI algorithm；C, it is by this
Number obtains a bias voltage value E ' multiplied by DC voltage value Ed；D, target bus voltage value Ed_target=DC voltage value
Ed+ bias voltage value E '.
It is further comprising the steps of between step a and step b: to increase a value limiter, limit the maximum value and most of ratio P
Small value.
Further include a step after step d: increasing a value limiter, with the maximum value to limited target busbar voltage
And minimum value.
After above method, compared with prior art, the present invention having the advantage that
Busbar voltage control method of the present invention for brshless DC motor driving frequency converter passes through relatively practical electricity in real time
Saturation factor and target voltage saturation factor are pressed to determine the voltage amplitude of adjustment, passes through change actual DC voltage again after opening PFC
Value is so that actual DC voltage value is same or about with target DC voltage value.Therefore, it can be seen that reality of the invention
Border DC voltage value is real-time change, and by changing actual voltage value so that virtual voltage saturation factor is higher, this is maintained for
The utilization rate of voltage is higher.Since the utilization rate of voltage is higher, the waste of voltage is not only avoided, and ensure that function
The normal work and heat dissipation of rate device, so that the reliability of device is guaranteed.
Further, further comprising the steps of between step a and step b: to increase a value limiter, limit ratio P's
Maximum value and minimum value.The use of the value limiter defines the maximum value and minimum value of ratio P, thus reduce malfunction,
Resource is utilized to improve system.
Further, further include a step after step d: increasing a value limiter, to limited target bus electricity
The maximum value and minimum value of pressure.The use of the value limiter defines the maximum value and minimum value of ratio P, to reduce mistake
Movement utilizes resource to improve system.
Detailed description of the invention
Fig. 1 is flow chart of the present invention for the busbar voltage control method of brshless DC motor driving frequency converter.
Fig. 2 is the schematic block diagram of step 2.
Fig. 3 is the voltage pattern of bus voltage value Ed.
Fig. 4 is the schematic diagram using present invention front and back.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
As shown in Figure 1 and Figure 2, a kind of busbar voltage control method for brshless DC motor driving frequency converter of the present invention,
Include the following steps,
(1), PFC is opened；
(2), it sets target voltage saturation factor Ratio_target and reads actual bus voltage value Ed, in the present embodiment
Middle target voltage saturation factor is usually set to 90% or so；Relationship such as 3 institute of attached drawing between busbar voltage and motor driven phase voltage
Show.
(3), virtual voltage saturation factor Ratio_v_e is calculated；
(4), target bus voltage value Ed_target is calculated；
(5), PFC is adjusted；
(6), change actual bus voltage value Ed to level off to target bus voltage value Ed_target；Change practical female
Line voltage value Ed is so that actual bus voltage value Ed is same or similar with target bus voltage value Ed_target, such as two
The error of person is within+the 10% or -10% of target bus voltage value.
The step (3) instructs Vq and DC voltage Ed it may also is that reading d shaft voltage instruction Vd, q shaft voltage,
These three values can be obtained by the sensor and driving algorithm of hardware.
Above three value is substituted intoCalculate virtual voltage saturation factor Ratio_v_
e。
The step (4) it may also is that a, by virtual voltage saturation factor Ratio_v_e and target voltage saturation factor
Ratio_target is divided by, and obtains a ratio P；B, it 1 subtracts ratio P and obtains a biasing coefficient C by PI algorithm；C, it is by this
Number obtains a bias voltage value E ' multiplied by DC voltage value Ed；D, target bus voltage value Ed_target=DC voltage value
Ed+ bias voltage value E '.
Wherein, PI coefficient is to follow speed to set according to the D/C voltage of PFC.
It is further comprising the steps of between step a and step b: to increase a value limiter, limit the maximum value and most of ratio P
Small value.That is for value between the maximum value and minimum value of ratio P, signal is effective and can carry out next step data processing.This ratio
The maximum value of value P is Ed_max/Ed, and the maximum value of ratio P is Ed_min/Ed, and wherein the value of Ed_max and E_min is also root
According to actual default.
Further include a step after step d: increasing a voltage limitator, with the maximum to limited target busbar voltage
Value and minimum value.That is for value between the maximum value and minimum value of target bus voltage, signal is effective and can carry out in next step
Data processing.The maximum value and minimum value of target bus voltage are according to setting the case where system, and different systems has difference
Voltage limit, thick lines shown in figure are target bus voltage value Ed_target, and hachure is virtual voltage saturation factor
Ratio_v_e；
In the present embodiment, setting minimum bus voltage be 300V, maximum busbar voltage be 380V, target bus voltage with
With the modulator approach of voltage saturation rate, as shown in Figure 4.When the method for the present invention is not used, target bus voltage is generally fixed value,
380V horizontal line as shown in Figure 4；After the present invention, then variable adjustment is carried out according to saturation factor.It is located at 90%-95% in Fig. 4
Between that curve be virtual voltage saturation factor, being located at 90% that curve below is present invention target bus adjusted
Voltage value.
Only highly preferred embodiment of the present invention is described above, but is not to be construed as limiting the scope of the invention.This
Invention is not limited only to above embodiments, and specific structure is allowed to vary.In every case in the protection model of independent claims of the present invention
Interior made various change is enclosed to be within the scope of the invention.
Claims (4)
1. a kind of busbar voltage control method for brshless DC motor driving frequency converter, it is characterised in that: including following step
Suddenly,
(1), PFC is opened；
(2), it sets target voltage saturation factor Ratio_target and reads actual bus voltage value Ed；
(3), virtual voltage saturation factor Ratio_v_e is calculated；
(4), target bus voltage value Ed_target is calculated；
(5), PFC is adjusted；
(6), change actual bus voltage value Ed to level off to target bus voltage value Ed_target；
Wherein, the step (3) instructs Vq and DC voltage Ed it may also is that reading d shaft voltage instruction Vd, q shaft voltage,
Above three value is substituted intoCalculate virtual voltage saturation factor Ratio_v_e.
2. the busbar voltage control method for brshless DC motor driving frequency converter, feature exist according to claim 1
In: the step (4) it may also is that a, by virtual voltage saturation factor Ratio_v_e and target voltage saturation factor Ratio_
Target is divided by, and obtains a ratio P；B, it 1 subtracts ratio P and obtains a biasing coefficient C by PI algorithm；C, by the coefficient multiplied by
DC voltage value Ed obtains a bias voltage value E '；D, target bus voltage value Ed_target=DC voltage value Ed+ is inclined
Set voltage value E '.
3. the busbar voltage control method for brshless DC motor driving frequency converter, feature exist according to claim 2
In: between step a and step b it is further comprising the steps of: increase a value limiter, limit ratio P maximum value and minimum value.
4. the busbar voltage control method for brshless DC motor driving frequency converter, feature exist according to claim 2
In: further include a step after step d: increasing a value limiter, with the maximum value to limited target busbar voltage and most
Small value.
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| CN201610873276.XA CN106357102B (en) | 2016-09-30 | 2016-09-30 | Busbar voltage control method for brshless DC motor driving frequency converter |
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| CN201610873276.XA CN106357102B (en) | 2016-09-30 | 2016-09-30 | Busbar voltage control method for brshless DC motor driving frequency converter |
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| CN106357102B true CN106357102B (en) | 2018-12-04 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108194338B (en) * | 2018-01-15 | 2022-03-25 | 杭州先途电子有限公司 | Compressor driving voltage saturation control method and device |
| CN108400745B (en) * | 2018-03-26 | 2020-12-04 | 杭州先途电子有限公司 | Motor control method and device |
| CN109818490A (en) * | 2019-03-25 | 2019-05-28 | 珠海格力电器股份有限公司 | Circuit of power factor correction and its control method and device, electrical equipment |
| CN110707919B (en) * | 2019-11-11 | 2020-11-03 | 宁波奥克斯电气股份有限公司 | PFC circuit control method and device and air conditioner |
| CN111706953B (en) * | 2020-06-03 | 2021-10-15 | 宁波奥克斯电气股份有限公司 | Variable frequency air conditioner controller bus voltage control method and device and air conditioner |
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| CN102299649A (en) * | 2010-06-24 | 2011-12-28 | 盛飞 | Power supply converter |
| CN102629833A (en) * | 2011-02-08 | 2012-08-08 | 快捷韩国半导体有限公司 | Power supply and apparatus and method for controlling link voltage control switch |
| CN103580042A (en) * | 2012-07-25 | 2014-02-12 | 艾默生网络能源有限公司 | PFC circuit bus voltage automatic equalization method and device |
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| US9099935B2 (en) * | 2013-01-14 | 2015-08-04 | Yaskawa America, Inc. | Single-phase active front end rectifier system for use with three-phase variable frequency drives |
| CN105610368A (en) * | 2016-01-14 | 2016-05-25 | 广东美芝制冷设备有限公司 | Weak magnetic control method and device of compressor and compressor control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102299649A (en) * | 2010-06-24 | 2011-12-28 | 盛飞 | Power supply converter |
| CN102629833A (en) * | 2011-02-08 | 2012-08-08 | 快捷韩国半导体有限公司 | Power supply and apparatus and method for controlling link voltage control switch |
| CN103580042A (en) * | 2012-07-25 | 2014-02-12 | 艾默生网络能源有限公司 | PFC circuit bus voltage automatic equalization method and device |
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