CN107834940A - A kind of switched reluctance motor and generator control system based on digital signal processor - Google Patents
A kind of switched reluctance motor and generator control system based on digital signal processor Download PDFInfo
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- CN107834940A CN107834940A CN201711154459.7A CN201711154459A CN107834940A CN 107834940 A CN107834940 A CN 107834940A CN 201711154459 A CN201711154459 A CN 201711154459A CN 107834940 A CN107834940 A CN 107834940A
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Classifications
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- 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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/28—Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases
-
- 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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/0004—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
-
- 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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/08—Reluctance motors
- H02P25/0805—Reluctance motors whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The present invention relates to one kind to be based on digital signal processor (Digital Signal Processor, DSP switched reluctance motor/generator (Switched Reluctance Dynamo/Generator), SRD/G) control strategy of system, control program, and DSP hardware controller design.By startup stage control strategy control by Angle-domain imaging determine in power inverter per phase switching tube allow turn on section；The effective control charged to battery is realized by power generating stage control strategy；And TMS320F240 type DSP Processors are used by controller, it is suitable for the detection and control to physical quantitys such as the electric current of power inverter and SRD/G motors, voltage, temperature, angle position speed.
Description
Technical field
The present invention relates to the switching magnetic-resistance based on digital signal processor (Digital Signal Processor, DSP)
Control strategy and control of the motor with generator (Switched Reluctance Dynamo/Generator, SRD/G) system
Scheme processed.
Background technology
The starter of domestic automobile and generator are all separated that general starter uses brush DC motors at present,
And generator is frequently with the alternating current generator with rectifying tube and voltage regulator.The present invention will likely save said two devices unification
Motor space, improve the utilization rate of equipment.Have and DC generation formula is employed on the car or light bus, lorry of some imports
Motivation, starter and generator are combined into one, during starting, compound wound d.c electric motor is connected into by firing switch；Rise
After dynamic, then as co-excited dc generator.Present invention research is started with switch magnetic-resistance starting/generator substitution Traditional DC；
Generator, many drawbacks of direct current generator will be overcome, there is incomparable superiority.
For automobile power system using constant voltage charging method, this charging modes and major defect are charging currents at present
Size can not adjust, there is no assurance that the thorough full charge of battery, can not be used for the initial charge and desulfuration charging of battery,
The battery used for automobile, in order to prevent it from producing vulcanization failure, it is necessary to which regular (each two moon) is pulled down and use constant-current charge
Method charges once.Switch reluctance generator can directly export controllable pulse direct current in invention, be very suitable for battery storage
Electric energy is deposited, and can be controlled by DSP and realize intelligent charging, so as to give full play to the efficiency of battery, and is improved
The service life of battery.
The content of the invention
The technical problem to be solved in the present invention is：In order to realize the electronic steady control with generating of switched reluctance machines, this
Invention provides a kind of control strategy based on DSP.The technical solution adopted for the present invention to solve the technical problems is：One kind is based on
DSP control system strategy and control device, including:
(1) startup stage control strategy
(a) determined to allow conducting section per phase switching tube in power inverter by Angle-domain imaging, in this stage
The turn-on angle control signal in above-mentioned conducting section is substantially synchronous with the phase position signal detected, and hold-off angle control signal needs
For a period of time, if because in inductance peak on-off switching tube, now existing electric current can be led advanced inductance peak
The generation of braking moment is caused, so as to hinder motor to accelerate；And a period of time shut-off in advance is to ensure electric current into inductance
Zero is reduced to before declining area.
(b) the maximum I of electric current is given in the section determined by Angle-domain imagingmaxWith minimum value IminIt is constant.When
The winding current of current sensor detection decays to setting minimum value IminWhen, controlling switch pipe is again open-minded, so repeatedly.
Electric current duration, average current are approximatelyAlso the method for determining turn-off time Δ t can be used, i.e., whenever electric current
The winding current of sensor detection is more than ImaxWhen, just make respective switch pipe shut-off the Δ t times after again controlling switch pipe open again
It is logical.The advantages of this method is the switching frequency of energy controlling switch pipe, so as to the switching loss of limit switch pipe.The control in this stage
System is shown in Fig. 1.
(2) power generating stage control strategy
When switched reluctance machines running speed is higher than certain particular value, if battery dump energy is less than a certain lower limit,
It is required that switched reluctance machines are operated in generating state, are charged to battery and provide power supply for load.
According to the charge characteristic of battery, two-stage charging can be divided, i.e., master fills, filled, and sees Fig. 2.
(a) when single-unit accumulator voltage is less than 2.40V, using high current constant-current charge, now charging current is 0.2CA
(C is accumulator capacity)；
(b) when single-unit accumulator voltage rises to 2.4V, 80% electricity has about been filled with, should now be transformed into second-order
Section, 2.4V voltages are maintained to carry out constant-voltage charge.
When batteries to load because providing larger current, when causing off-capacity, single-unit battery tension can fall to
Below 2.3V, now, generator charging working condition will be converted into the first stage automatically, so circulation.
(3) controller design
Controller uses TMS320F240 types digital signal processor (DSP), is suitable for power inverter and SR motors
Electric current, voltage, temperature, the physical quantity such as angle position speed detection and control, structure is as shown in Figure 5.Fig. 6 gives DSP
Hardware block diagram during work, as shown in the figure：DSP high-speed a/d mouth detection electric current and the size of battery tension, pass through numeral
The PI computings of change, DSP provide the size of current chopping limit and input D/A converting units, converting unit output by digital I/O mouths
The analog quantity size of copped wave limit；Hystersis controller obtains producing chopping signal after copped wave limit；DSP capturing unit passes through capture
The jump edge of rotor-position signal, calculates rotor-position and motor speed, tables look-up to obtain the optimization in this velocity shooting generator
Turn-on angle turns off angle size, and θ is provided by digital I/O mouths1、θ2Signal；Chopping signal and θ1、θ2The mistake of signal and circuit flows through
Pressure signal inputs programmable logic chip together, and the drive signal of switching tube is provided after logical operation.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is start-up period control principle drawing.
Fig. 2 is two-stage charging curve.
Fig. 3 is current regulation schematic diagram.
Fig. 4 is voltage-regulation schematic diagram.
Fig. 5 is SRD/G control system pie graphs.
Fig. 6 is DSP hardware block diagram.
Embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These accompanying drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
The technical solution adopted for the present invention to solve the technical problems is：A kind of control system strategy and control based on DSP
Device processed, including:
(1) startup stage control strategy
Now switched reluctance machines are actually operated in motoring condition, absorb electric energy from the external world.It can make out on control strategy
Close reluctance motor and possible maximum electromagnetic torque is provided all the time at this stage, accelerate to start.
Electromagnetic torque is as caused by phase currentDue toIt is a structure with motor, material
Expect relevant variable, as long asRising area keeps i maximum, that is, can guarantee that switched reluctance machines output electromagnetic torque TemIt is maximum.
Because the stage is in low speed Operational Zone, back-emf is smaller, and current changing rate is big, too fast to avoid electric current from rising,
The maximum current allowed more than power switch component and motor, therefore by the way of Angle-domain imaging adds copped wave current limliting.
(a) determined to allow conducting section per phase switching tube in power inverter by Angle-domain imaging, in this stage
The turn-on angle control signal in above-mentioned conducting section is substantially synchronous with the phase position signal detected, and hold-off angle control signal needs
For a period of time, if because in inductance peak on-off switching tube, now existing electric current can be led advanced inductance peak
The generation of braking moment is caused, so as to hinder motor to accelerate；And a period of time shut-off in advance is to ensure electric current into inductance
Zero is reduced to before declining area.
(b) the maximum I of electric current is given in the section determined by Angle-domain imagingmaxWith minimum value IminIt is constant.
When the winding current of current sensor detection decays to setting minimum value IminWhen, controlling switch pipe is again open-minded, so repeatedly.
In electric current duration, average current is approximatelyAlso the turn-off time Δ t method of determining can be used, i.e., whenever
The winding current of current sensor detection is more than ImaxWhen, just make after the respective switch pipe shut-off Δ t times that controlling switch pipe is again again
It is open-minded.The advantages of this method is the switching frequency of energy controlling switch pipe, so as to the switching loss of limit switch pipe.This stage
Fig. 1 is shown in control.
(2) power generating stage control strategy
When switched reluctance machines running speed is higher than certain particular value, if battery dump energy is less than a certain lower limit,
It is required that switched reluctance machines are operated in generating state, are charged to battery and provide power supply for load.
According to the charge characteristic of battery, two-stage charging can be divided, i.e., master fills, filled, and sees Fig. 2.
(a) when single-unit accumulator voltage is less than 2.40V, using high current constant-current charge, now charging current is 0.2CA
(C is accumulator capacity)；
(b) when single-unit accumulator voltage rises to 2.4V, 80% electricity has about been filled with, should now be transformed into second-order
Section, 2.4V voltages are maintained to carry out constant-voltage charge.
When batteries to load because providing larger current, when causing off-capacity, single-unit battery tension can fall to
Below 2.3V, now, generator charging working condition will be converted into the first stage automatically, so circulation.Constant flow regulation and perseverance
The schematic diagram of pressure regulation is shown in Fig. 3 and Fig. 4 respectively.
Electric current and voltage control can also use chop control scheme, with copped wave threshold value control exciting current icSize, make
Obtain in turn-on angle θ1To shut-off angle θ2In the range of exciting current be no more than controlling value.Adjust the i.e. controllable output current of copped wave threshold value
With the size of voltage.Using this control strategy, controller calculates current SR motors according to the input signal of position sensor
Rotating speed and position, determine by tabling look-up and export shut-off angle θ 2, the turn-on angle θ 1 of optimization, current actual value deviates set-point
Error signal obtains the optimal I under the rotating speed after PID arithmeticc。
(3) controller design
Controller uses TMS320F240 types digital signal processor (DSP).The processor is for the special of motor control
With chip, have arithmetic speed fast (performing an instruction only 50ns), the integrated high-speed a/d of interior band, task manager, capture are single
Member and PWM units, are suitable for physical quantitys such as the electric current of power inverter and SR motors, voltage, temperature, angle position speed
Detection and control, structure is as shown in Figure 5.In addition, the system also includes following components：
(a) the bus current signal of current sensor collection, the voltage signal of voltage sensor collection, and be digitized
Processing；
(b) position sensor collection rotor-position signal；
(c) digital PI computings in real time are carried out to the current and voltage signals of collection by single-chip microcomputer or DSP, provides electric current and cut
Ripple limits Ichop；The rotor-position signal of collection is resolved, provides corresponding θ1,θ2；
(d)Ichop, θ1,θ2And input signals of the winding phase current Iphase as hystersis controller, hystersis controller are defeated
Go out final switching tube drive signal (in addition, when motor is in start-up period, the input I of hystersis controllerchopSignal
Change given I intomaxAnd IminSignal).
Claims (1)
1. one kind is based on switched reluctance machines (SRD/G) control system of digital signal processor (DSP), it is characterised in that bag
Include：
(1) startup stage control strategy
(a) determined in power inverter to allow to turn on section per phase switching tube by Angle-domain imaging, it is above-mentioned in this stage
The turn-on angle control signal for turning on section is substantially synchronous with the phase position signal detected.
(b) the maximum I of electric current is given in the section determined by Angle-domain imagingmaxWith minimum value IminIt is constant.
(2) power generating stage control strategy
(a) when single-unit accumulator voltage is less than 2.40V, using high current constant-current charge, now charging current is that (C is 0.2CA
Accumulator capacity)；
(b) when single-unit accumulator voltage rises to 2.4V, 80% electricity has about been filled with, should now be transformed into second stage,
2.4V voltages are maintained to carry out constant-voltage charge.
(3) controller design
Controller uses TMS320F240 types digital signal processor (DSP), is suitable for the electricity to power inverter and SR motors
The detection and control of the physical quantitys such as stream, voltage, temperature, angle position speed.
In addition, the system also includes following components：
(a) the bus current signal of current sensor collection, the voltage signal of voltage sensor collection, and it is digitized place
Reason；
(b) position sensor collection rotor-position signal；
(c) digital PI computings in real time are carried out to the current and voltage signals of collection by single-chip microcomputer or DSP, provides current chopping limit
Ichop；The rotor-position signal of collection is resolved, provides corresponding θ1,θ2；
(d)Ichop, θ1,θ2And input signals of the winding phase current Iphase as hystersis controller, hystersis controller export most
Whole switching tube drive signal (in addition, when motor is in start-up period, the input I of hystersis controllerchopSignal changes into
Given ImaxAnd IminSignal).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711154459.7A CN107834940A (en) | 2017-11-20 | 2017-11-20 | A kind of switched reluctance motor and generator control system based on digital signal processor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711154459.7A CN107834940A (en) | 2017-11-20 | 2017-11-20 | A kind of switched reluctance motor and generator control system based on digital signal processor |
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| CN107834940A true CN107834940A (en) | 2018-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711154459.7A Pending CN107834940A (en) | 2017-11-20 | 2017-11-20 | A kind of switched reluctance motor and generator control system based on digital signal processor |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6442535B1 (en) * | 1998-10-28 | 2002-08-27 | Emerson Electric Co. | Method and apparatus for implementing a low cost, intelligent controller for a switched reluctance machine |
| US6703808B1 (en) * | 2001-10-31 | 2004-03-09 | Dana Corporation | Active power limiting for starter/alternator in the generation mode |
-
2017
- 2017-11-20 CN CN201711154459.7A patent/CN107834940A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6442535B1 (en) * | 1998-10-28 | 2002-08-27 | Emerson Electric Co. | Method and apparatus for implementing a low cost, intelligent controller for a switched reluctance machine |
| US6703808B1 (en) * | 2001-10-31 | 2004-03-09 | Dana Corporation | Active power limiting for starter/alternator in the generation mode |
Non-Patent Citations (3)
| Title |
|---|
| 全力: "基于开关磁阻电机的汽车ISAD系统研究与实践", 《中国博士学位论文全文数据库》 * |
| 吴韬: "小功率开关磁阻发电系统的理论研究与实践", 《中国优秀硕士学位论文全文数据库》 * |
| 方天治等: "开关磁阻发电机的控制模式及仿真研究", 《计算机仿真》 * |
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