CN105846740A - Full bridge controllable power generating system employing doubly-salient generator and control method thereof - Google Patents
Full bridge controllable power generating system employing doubly-salient generator and control method thereof Download PDFInfo
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- CN105846740A CN105846740A CN201610280905.8A CN201610280905A CN105846740A CN 105846740 A CN105846740 A CN 105846740A CN 201610280905 A CN201610280905 A CN 201610280905A CN 105846740 A CN105846740 A CN 105846740A
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- salient
- double
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- generator
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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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/36—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using armature-reaction-excited machines
-
- 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
- H02P2103/00—Controlling arrangements characterised by the type of generator
-
- 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
- H02P2201/00—Indexing scheme relating to controlling arrangements characterised by the converter used
- H02P2201/03—AC-DC converter stage controlled to provide a defined DC link voltage
Abstract
The invention discloses a full bridge controllable power generating system employing a doubly-salient generator. The full bridge controllable power generating system includes a prime motor, the doubly-salient generator, a rectification power circuit and a generator controller. The prime motor drives the doubly-salient generator to rotate. The magnitude and the on-off of exciting current of the doubly-salient generator are controlled by the generator controller. One ends of windings of the doubly-salient generator are connected in a star shape so as to form a winding midpoint while the other ends of the windings are led out to connect with a compensation capacitor in series and then to connect with the input terminal of the rectification power circuit. The output terminal of the rectification circuit is connected with a load through a filtering capacitor and supplies power for the load. According to the invention, the output power of the motor can be increased, the voltage adjustment rate can be reduced and phase current control becomes quicker and more flexible. The invention discloses a control method of the full bridge controllable power generating system employing the doubly-salient generator.
Description
Technical field
The invention belongs to extraordinary electricity generation system, particularly to a kind of double salient-pole electric machine controlled rectification electricity generation system and
Control method.
Background technology
Double salient-pole electric machine is a kind of typical variable reluctance motor, and its stator and rotor are salient-pole structure so that magnetic resistance
The ratio of maximum and minimum of a value is maximum, has good energy converting between mechanical characteristic.Double salient-pole electric machine structure work
Skill is simple, and rotor does not exist winding, motor stable and reliable operation.Double salient-pole electric machine is permissible according to excitation mode
It is divided into doubly salient permanent magnet motor, electric excitation biconvex electrode electric machine and mixed excitation biconvex pole motor T.Electric excitation biconvex electrode
Motor changes air-gap field by regulation exciting current, its cooperation rectification topology and sending out that voltage regulator controllers is formed
Electricity system, can be used for brushless direct-current generating occasion.Rectification topology is frequently with full-bridge uncontrollable rectifier topology at present, double
The phase winding of salient-pole machine is joined directly together with diode rectification topology after doing Y-connection.Voltage regulator controllers is by right
The regulation of exciting current realizes the pressure regulation of wide scope, and the defencive function of quick de-excitation when having fault.But,
Owing to phase current, armature-reaction etc. can not be controlled by uncontrollable rectifier topology, cause power of motor density relatively low,
Only it is controlled exciting current promoting power output；The usual inductance of Exciting Windings for Transverse Differential Protection is relatively big, becomes excitation pressure regulation
Response time longer；And the electricity generation system becoming excitation pressure regulation is not particularly suited for doubly salient permanent magnet motor.
Controlled rectification technology can improve output work on the premise of not changing double salient-pole electric machine body construction further
Rate.On the basis of uncontrollable rectifier topology, increase controlled power switch tube device, take suitably to control plan
Generating power output slightly can be promoted with control mode, and by becoming armature supply regulation output voltage.But,
The external characteristics of full-bridge controlled rectification is relatively soft, and voltage regulation factor is bigger；Many for the phase winding number of turn, armature is electric
Feel big double salient-pole electric machine, the induction reactance of phase winding make full-bridge controlled rectification for generator power lifting more
Limited, and it is unfavorable for the most effectively controlling armature supply.
Summary of the invention
The purpose of the present invention, is to provide a kind of controlled electricity generation system of double-salient-pole generator full-bridge and controlling party thereof
Method, it can increase the power output of motor, reduce voltage regulation factor, and make more to accelerate the control of phase current
Speed is flexibly.
In order to reach above-mentioned purpose, the solution of the present invention is:
A kind of controlled electricity generation system of double-salient-pole generator full-bridge, including prime mover, double-salient-pole generator, rectification merit
Rate circuit and engine controller, wherein, prime mover drags double-salient-pole generator and rotates, and described double-salient-pole generates electricity
The exciting current of machine is controlled its size and break-make by engine controller；The each phase winding of described double-salient-pole generator
One end is constituted around class mid point with Y-connection, and the other end of each phase winding is all drawn, respectively with compensation capacitances in series
After, connecting the input of rectified power circuit, the output of described rectified power circuit connects via filter capacitor
Load, for load supplying.
Above-mentioned double-salient-pole generator uses Fielding-winding doubly salient generator, permanent magnet double-salient pole generator or composite excitation
Double-salient-pole generator.
Above-mentioned rectified power circuit uses full-bridge controlled rectification circuit, and described full-bridge controlled rectification circuit includes 4
The branch road that bar is parallel with one another, every branch road all includes the upper brachium pontis being serially connected and lower brachium pontis, upper and lower brachium pontis
Formed by power switch pipe inverse parallel power diode.
A kind of control method of the controlled electricity generation system of double-salient-pole generator full-bridge, engine controller capturing and coding device
Rotor-position signal, armature supply, load output voltage and load current signal, take entirely to control strategy a pair whole
Stream power circuit in power switch pipe be controlled, described full control strategy one refer to induced potential for just with sense
The power switch pipe answering electromotive force to be two negative phase winding place brachium pontis is controlled.
Above-mentioned when being controlled power switch pipe, the control mode taked is Angle-domain imaging mode or pulse
Width modulated control mode.
Above-mentioned concrete control program is: electricity generation system takes Angle-domain imaging mode or pulse width modulation control
Mode processed controls the break-make of power switch pipe, needs to set current limit value according to motor characteristic and real work,
The each phase current of engine controller real-time sampling, turns off rectification merit when detecting that actual current exceedes when electric current limits
The power switch pipe turned in rate circuit, can make excessive armature supply quickly fall back to the restriction set
In.
After using such scheme, the invention have the characteristics that:
(1) present invention will compensate electric capacity phase winding each with motor and connect, can with not having the full-bridge compensating electric capacity
Control electricity generation system is compared, and when taking suitable control strategy and control mode, the external characteristics of generating is harder, voltage
Regulation diminishes, and power factor promotes, and peak power increases, thus logical on the basis of not changing motor body
Cross the controlled rectification circuit that coordinates with it and control strategy and improve the power density of double-salient-pole generator further；
(2) the capacitance compensation induction reactance of armature winding of motor each phase winding concatenation so that controlled generating is to electricity
The control of pivot electric current is more quickly, flexibly, effectively；
(3) be compared to the method for Shunt compensation capacitor between each phase winding, full-bridge controlled rectification circuit concatenate into
Compensating after electric capacity, when pressure is built in zero load, armature supply is still 0, builds that to press through journey safe and reliable, and remains complete
The high output voltage of bridge rectification；
(4) current chopping technology is introduced controlled electricity generation system, for limiting the peak value of each phase current, both subtracted
The virtual value of little phase current, reduces copper loss, ensures that again system is run in safe range；
(5) this electricity generation system is applicable to three-phase, four phases and heterogeneous electric excitation biconvex electrode dc generator, mixes
Close excitation biconvex electrode dc generator and permanent magnet double-salient-pole dc generator, can be applicable to wind generator system etc.
The occasion higher to power of motor density requirements.
Accompanying drawing explanation
Fig. 1 is the structural representation of electricity generation system of the present invention；
Wherein, Fig. 1 (a) is the system architecture schematic diagram using Fielding-winding doubly salient generator；Fig. 1 (b) is to adopt
With the system architecture schematic diagram of permanent magnet double-salient pole generator；Fig. 1 (c) is to use mixed excitation bisalient-pole generator
System architecture schematic diagram；
Fig. 2 is the connection topology schematic diagram of full-bridge controlled rectification circuit and double-salient-pole generator；
Fig. 3 is each preferable unloaded inductance mutually of four phase double salient-pole electric machines and back emf waveform schematic diagram；
Fig. 4 is working state schematic representation；
Wherein, Fig. 4 (a) be d phase back-emf be just, a phase back-emf working state schematic representation when being negative；
Fig. 4 (b) be a phase back-emf be just, b phase back-emf working state schematic representation when being negative；Fig. 4 (c)
Be b phase back-emf be just, c phase back-emf working state schematic representation when being negative；Fig. 4 (d) is that c is contrary
Electromotive force be just, d phase back-emf working state schematic representation when being negative；
Fig. 5 is a, the d two equivalent topologies schematic diagram when being conducted.
Detailed description of the invention
Below with reference to accompanying drawing, technical scheme is described in detail.
The present invention provides a kind of controlled electricity generation system of double-salient-pole generator full-bridge, including prime mover, double-salient-pole generating
Machine, rectified power circuit and engine controller, wherein, prime mover drags double-salient-pole generator and rotates, described
The exciting current of double-salient-pole generator is controlled its size and break-make by engine controller；Described double-salient-pole generator
One end of each phase winding is constituted around class mid point with Y-connection, and the other end of each phase winding is all drawn, respectively with benefit
After repaying capacitances in series, connecting the input of rectified power circuit, the output of described rectified power circuit is via filter
Ripple electric capacity connects load, for load supplying.
Wherein, double-salient-pole generator can use Fielding-winding doubly salient generator, permanent magnet double-salient pole generator or mixing
Excitation biconvex pole generator, can be respectively with reference to Fig. 1 (a), Fig. 1 (b), Fig. 1 (c), wherein, La、Lb、Lc、
LdRepresenting the armature winding inductance of double-salient-pole generator a, b, c, d phase respectively, some O is winding Y-connection
The midpoint constituted, ea、eb、ec、edRepresent the counter electromotive force of double-salient-pole generator a, b, c, d phase respectively,
Ca、Cb、Cc、CdRepresent the compensation electric capacity of double-salient-pole generator a, b, c, d phase winding series connection, u respectivelyf
Represent excitation voltage, uoRepresent output voltage, CoRepresent filter capacitor.
As a example by Fielding-winding doubly salient generator, rectified power circuit uses full-bridge controlled rectification circuit, electrical excitation
Double salient-pole electric machine is dragged by prime mover and rotates, and its exciting current is controlled its size and break-make by engine controller.
Each phase armature winding is star connection, and one end of each phase winding of double salient-pole electric machine is done Y-connection and constituted around class mid point
O point, the other end of each phase winding draws, respectively with compensate capacitances in series after, connect full-bridge controlled rectification circuit,
Last filtered electric capacity powers to the load.
Described full-bridge controlled rectification circuit includes 4 branch roads parallel with one another, and every branch road all includes mutually
The upper brachium pontis of series connection and lower brachium pontis, upper and lower brachium pontis is formed by power switch pipe inverse parallel power diode,
Coordinate shown in Fig. 2, first route power switch pipe Q1、Q4It is connected in series, Q1、Q4The most also
Connection power diode D1、D4；Second route power switch pipe Q3、Q6It is connected in series, Q3、Q6Point
Other inverse parallel power diode D3、D6；3rd route power switch pipe Q5、Q8It is connected in series, Q5、
Q8Inverse parallel power diode D respectively5、D8；4th route power switch pipe Q7、Q2Be connected in series and
Become, Q7、Q2Inverse parallel power diode D respectively7、D2；RoFor load.
The present invention also provides for the control method of a kind of controlled electricity generation system of double-salient-pole generator full-bridge, generator control
The signals such as device capturing and coding device rotor-position signal, armature supply, load output voltage, load current, according to
The each phase inductance of motor shown in Fig. 3 takes corresponding controlled power generation strategies to each phase brachium pontis with back emf waveform
On power switch pipe be controlled, wherein, ω represent rotor rotate electrical angle.The full-bridge that the present invention takes
Controlled power generation strategies is full control strategy one.Described full control strategy one, is i.e. just (inductance decline) to induced potential
It is controlled with the power switch pipe of the two phase winding place brachium pontis that induced potential is negative (inductance rising).Adopted
The control mode taken, including Angle-domain imaging mode, pulse width modulation control method.Take entirely to control strategy
Four phase double salient-pole electric machine bands compensate the full-bridge controlled rectification topological circuit working state schematic representation of electric capacity such as the moment
Shown in Fig. 4.By d phase back-emf shown in Fig. 4 (a) be just, a phase back-emf illustrate as a example by time negative, merit
Rate switching tube Q1、Q2During conducting, electric current is flowed out by filter capacitor anode, flows through Q successively1、Ca、La、Ld、
Cd、Q2, be equivalent to filter capacitor to phase winding charging and to load supplying；Power switch pipe Q1、Q2Turn off
I.e. D4、D7During afterflow, electric current is flowed into by filter capacitor anode, flows through D successively4、Ca、La、Ld、Cd、
D7, be equivalent to phase winding to filter capacitor charging and to load supplying.Engine controller is according to sampling
Position signalling, carries out conservative control to the break-make of power switch pipe, effectively controls armature supply defeated with effectively regulation
Go out voltage.
Equivalent topologies when a, d two is conducted is as shown in Figure 5.Loop equivalence can there be two inductance series connection.
The inductance that phase winding is bigger can make phase current delayed, suppresses the controlled rectification lifting to phase current, causes output work
Rate promotes less and can not the most effectively control phase current.Utilize the electric capacity connected with motor phase windings, compensate
The impact that winding self-induction produces.When taking identical controlled power generation strategies and the condition such as rotating speed, load constant,
Due to the compensation of electric capacity, controlled generating is more quickly effective to the control of armature supply, and generating external characteristics is harder,
Maximum power value increases, and the power density of double-salient-pole generator significantly improves.May produce after series capacitance
Big armature supply.This had not only brought bigger loss but also operating band steady in a long-term for system carrys out risk.By electric current
Chopper control mode combines with Angle-domain imaging mode or pulse width modulation control method, can effectively limit
Armature supply processed.Its implementing method is: electricity generation system still takes Angle-domain imaging mode or pulse width modulation
Control mode controls the break-make of power switch pipe, needs to set electric current according to motor characteristic and real work and limits
Value, each phase current of engine controller real-time sampling, whole when detecting that actual current turns off when exceeding electric current restriction
The power switch pipe turned in stream power circuit, can make excessive armature supply quickly fall back to setting
In limiting.
For reaching good compensation effect, need the capacitance compensating electric capacity that is respectively in series is calculated.Double-salient-pole
The highlights correlations such as the inductance parameters of generator and rotor-position, exciting current, armature supply are soft by finite element
Part emulation draws the mean value of phase winding inductance, and considers the impact of end inductance, in this, as capacitor's capacity
Calculate the foundation chosen, determine the size of capacitance in combination with the control strategy used and load current range.Root
According to generator self-characteristic and application scenario, some load current models can be marked off according to load current size
Enclose.When load current is bigger, needing to choose less electric capacity, when load current is less, needs are chosen bigger
Electric capacity.When motor working speed improves more, needing to choose the electric capacity of relatively low-capacitance, working speed declines relatively
Time many, need to choose the electric capacity of bigger capacitance.Constant at rotating speed or vary less, the change of load current does not surpasses
When crossing a certain scope, the capacitance of electric capacity varies without.
Summary, the controlled electricity generation system of double-salient-pole generator full-bridge of the present invention, can by capacitance compensation method and full-bridge
Control rectification combine, utilize the electric capacity compensating action to inductive circuit power factor, by some electric capacity respectively with
Each phase winding is connected, and improves the power factor of motor further, strengthens the controlled rectification lifting to power, and
Realize effective control more rapid to armature supply.
The control method that the present invention provides, engine controller is according to the motor rotor position signal sampled, electricity
Pivot current signals etc., produce corresponding driving signal of power switching tube according to controlled power generation strategies, cut in conjunction with electric current
Ripple controls, it is achieved the change armature supply pressure regulation in the range of safe phase current.The capacitance compensation connected with each phase winding
The impact of winding inductance, further increases the power output of motor, reduces voltage regulation factor, and make
Control more fast and flexible to phase current.
Above example is only the technological thought that the present invention is described, it is impossible to limit protection scope of the present invention with this,
Every technological thought proposed according to the present invention, any change done on the basis of technical scheme, each fall within this
Within invention protection domain.
Claims (6)
1. the controlled electricity generation system of double-salient-pole generator full-bridge, it is characterised in that: include prime mover, biconvex
Pole generator, rectified power circuit and engine controller, wherein, prime mover drags double-salient-pole generator and rotates,
The exciting current of described double-salient-pole generator is controlled its size and break-make by engine controller；Described double-salient-pole is sent out
One end of each phase winding of motor is constituted around class mid point with Y-connection, and the other end of each phase winding is all drawn, respectively
After compensating capacitances in series, connect the input of rectified power circuit, the output warp of described rectified power circuit
Load is connected, for load supplying by filter capacitor.
2. a kind of controlled electricity generation system of double-salient-pole generator full-bridge as claimed in claim 1, it is characterised in that:
Described double-salient-pole generator uses Fielding-winding doubly salient generator, permanent magnet double-salient pole generator or mixed excitation bisalient
Pole generator.
3. a kind of controlled electricity generation system of double-salient-pole generator full-bridge as claimed in claim 1, it is characterised in that:
Described rectified power circuit uses full-bridge controlled rectification circuit, and described full-bridge controlled rectification circuit includes 4 phases
Branch road mutually in parallel, every branch road all includes the upper brachium pontis being serially connected and lower brachium pontis, upper and lower brachium pontis by
Power switch pipe inverse parallel power diode and form.
4. the control method of the controlled electricity generation system of double-salient-pole generator full-bridge, it is characterised in that: generator
Controller capturing and coding device rotor-position signal, armature supply, load output voltage and load current signal, adopt
Taking the full power switch pipe controlled in tactful a pair rectified power circuit to be controlled, it is right that described full control strategy one refers to
Induced potential is to be just that the power switch pipe of two negative phase winding place brachium pontis is controlled with induced potential.
The control method of a kind of controlled electricity generation system of double-salient-pole generator full-bridge the most as claimed in claim 4,
It is characterized in that: described when being controlled power switch pipe, the control mode taked is Angle-domain imaging side
Formula or pulse width modulation control method.
The control method of a kind of controlled electricity generation system of double-salient-pole generator full-bridge the most as claimed in claim 5,
It is characterized in that: described concrete control program is: electricity generation system takes Angle-domain imaging mode or pulse width
Degree modulation control mode controls the break-make of power switch pipe, needs to set electric current according to motor characteristic and real work
Limits value, each phase current of engine controller real-time sampling, closes when detecting that actual current exceedes when electric current limits
The power switch pipe turned in disconnected rectified power circuit, can make excessive armature supply quickly fall back to set
In fixed restriction.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113676094A (en) * | 2021-07-29 | 2021-11-19 | 南京航空航天大学 | Control method of double-salient-pole generator full-bridge controllable power generation system |
| CN113783483A (en) * | 2021-09-29 | 2021-12-10 | 苏州达思灵新能源科技有限公司 | Control system and control method for electro-magnetic doubly salient direct-current generator |
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| CN113783483A (en) * | 2021-09-29 | 2021-12-10 | 苏州达思灵新能源科技有限公司 | Control system and control method for electro-magnetic doubly salient direct-current generator |
| CN113783483B (en) * | 2021-09-29 | 2022-06-21 | 苏州达思灵新能源科技有限公司 | Control system and control method for electro-magnetic doubly salient direct-current generator |
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Application publication date: 20160810 |