CN104617685A - Contactless inductive power transmission control device and method thereof - Google Patents
Contactless inductive power transmission control device and method thereof Download PDFInfo
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Abstract
A contactless inductive power transmission control device comprises a primary side portion and an auxiliary side portion and is characterized in that the primary side portion adopts capacitor series connection, the auxiliary side portion adopts capacitor parallel connection, two closed loop circuits are arranged on two sides of the primary side and the auxiliary side, an independent controller is designed in a closed loop, and meanwhile the primary side resonant current and the auxiliary side output voltage are controlled. The device and the method have the advantage that the primary side resonant current and the auxiliary side output voltage of an ICTP system can be controlled simultaneously and dynamically, and stable transmission of power under load disturbance of the system is ensured. The primary side control circuit and the auxiliary side control circuit are designed independently, and no signal communication is required to be conducted between the primary side and the auxiliary side.
Description
Technical field
The present invention relates to contact inductive electric energy transmission field, be specially a kind of contact inductive electric energy transmission control unit of ICPT system, also relate to a kind of contact inductive electric energy transfer control method.
Background technology
Contact inductive electric energy transmission (Inductively coupled power transfer, ICPT) is a kind of new electric energy transmission technology realized by electromagnetic induction principle.This technology has broken away from the conventional electrical way of contact, overcomes the drawback of conventional electrical contact supply power mode under the adverse circumstances such as high temperature, high humidity, high corrosion.
The relative position of contact inductive electric energy transmission technology to transmission equipment has strict demand, especially in the charging application of electric automobile, if there is relative position change during charging electric vehicle, the coupling coefficient of system will by considerable influence, thus cause output voltage to change, also affect the stability of former limit resonance current simultaneously, the stable transfer of system capacity cannot be ensured.And when load dynamic change, the reflected umpedance produced on former limit also can change and produce considerable influence to former limit resonance current and secondary output voltage, cannot ensure the stable transfer of system power, also be unfavorable for the stable pickup of secondary energy thereupon.
For this kind of problem, Chinese scholars proposes different control methods, comprises decoupling method, constant current sectionalized control method, electric capacity switching at runtime method, former limit active control etc.But these methods all do not carry out Dynamic controlling to former limit resonance current and secondary output voltage simultaneously.
Summary of the invention
The object of the application is to provide a kind of composite control apparatus and method thereof that control contact inductive electric energy transmission system Central Plains limit resonance current and secondary output voltage simultaneously, the problem of the delivery of electrical energy instability caused during to solve load dynamic change.
The object of the present invention is achieved like this:
A kind of contact inductive electric energy transmission control unit, comprise former edge to divide and secondary part, it is characterized in that: described former edge is divided into capacitances in series, described secondary part is Capacitance parallel connection, described former limit and secondary both sides are respectively equipped with two closed loops, design an independent control in each closed loop, control former limit resonance current and secondary output voltage simultaneously.
Further, described former edge is divided by direct voltage source U
dc(1), high-frequency inversion link and former limit resonant network composition.
Further, described high-frequency inversion link is made up of four full-controlled switch pipes and anti-paralleled diode one (2), anti-paralleled diode two (3), anti-paralleled diode three (4) and anti-paralleled diode four (5), and DC input voitage is converted to high frequency square wave voltage and outputs to former limit resonant network by described high-frequency inversion link.
Further, described former limit resonant network is by building-out capacitor C
1(7) with primary coil inductance L
1(8) in series, its role is to convert high frequency square wave voltage to high frequency sinusoidal resonance current, and produce high frequency magnetic field around primary coil (8).
Further, described secondary part comprises secondary series resonant network, uncontrollable rectifier bridge (11), boosting rectifier control network and load R
l(16), by the coupling between the circle of former and deputy sideline, secondary coil inductance L
2(9) produce induced electromotive force on, and realize resonance by secondary series resonant network.
Further, described secondary resonant network is by building-out capacitor C
2and secondary coil inductance L (10)
2(9) compose in parallel.
Further, described uncontrollable rectifier bridge (11) is for the rectification of high frequency ac signal, and described boosting rectifier control network is by filter inductance L
f(12), filter capacitor C
f(15), diode (14) and full-controlled switch pipe S (13) composition.
And then the present invention also provides a kind of control method based on said apparatus, it is characterized in that: the performing step of closed-loop path, described former limit:
1), former limit resonance current is detected by current transformer (6);
2) effective value of resonance current, is calculated by signal processing module (23);
3), the resonance current effective value obtained and resonance current effective value desired value are compared in former limit comparator (22) obtain resonance current error;
4), resonance current error is input to former limit controller (21) as input signal;
5), former limit controller (21) output signal controls to export phase shifting angle, as input signal input phase modulation module (19) by former limit amplitude limiter (20);
6), phase modulation module (19) produces the gate-control signal of high-frequency inverter circuit, inputs former limit driver (18) and controls high-frequency inverter circuit, and then control former limit input voltage as input signal;
7), former limit resonance current is controlled by controlling former limit input voltage.
Further, the performing step of described secondary closed-loop path:
1), secondary output voltage is detected by voltage transformer (17);
2), the output voltage obtained and output voltage desired value are compared in secondary amplitude limiter (26) obtain output voltage error;
3), output voltage error is input to secondary controller (27) as input signal;
4), secondary controller (27) output signal controls output duty cycle, as input signal input duty cycle modulation module (25) by secondary amplitude limiter (26);
5), duty ratio modulation module (25) produces the switching signal of boost chopper, controls conducting and the disconnection of boost chopper switching tube (13) as input signal input secondary driver (24);
6) conducting, by controlling boost chopper switching tube (13) controls secondary output voltage with disconnection.
Further, described former limit, secondary controller are specially former limit PID controller (21), secondary PID controller (27).
Further, the parameter of described former limit PID controller (21) is K
p=0.0002, K
i=3, K
d=0.0003; The parameter of secondary PID controller (27) is K
p=0.0165, K
i=3.9, K
d=0.001, described former limit resonance current effective value desired value i
ref=41A, secondary output voltage desired value u
ref=70V.
Further, closed-loop path, described former limit realizes as follows:
1), former limit resonance current i is detected by current transformer (6)
p(t);
2) effective value of resonance current, is calculated by signal processing module (23)
3) the resonance current effective value I, will obtained
pwith resonance current effective value desired value i
refcompare in former limit comparator (22) and obtain resonance current error e
1=i
ref-I
p;
4), by resonance current error e
1former limit PID controller (21) is input to as input signal;
5), the output signal on former limit PID controller (21) controls to export phase shifting angle α by former limit amplitude limiter (20), and α is as input signal input phase modulation module (19);
6), phase modulation module (19) produces the gate-control signal of high-frequency inverter circuit, inputs former limit driver (18) and controls high-frequency inverter circuit, and then control former limit input voltage as input signal;
7), former limit resonance current i is controlled by controlling former limit input voltage
p.
Further, described secondary closed-loop path realizes as follows:
1), secondary output voltage u is detected by voltage transformer (17)
o;
2) the output voltage u, will obtained
owith output voltage desired value u
refcompare in secondary comparator (28) and obtain output voltage error e
2=u
ref-u
o;
3), by output voltage error e
2secondary PID controller (27) is input to as input signal;
4), the output signal of secondary PID controller (27) controls output duty cycle d, as input signal input duty cycle modulation module (25) by secondary amplitude limiter (26);
5), duty ratio modulation module (25) produces the switching signal of boost chopper switching tube, controls conducting and the disconnection of boost chopper switching tube (13) as input signal input secondary driver (24);
6) conducting, by controlling boost chopper switching tube (13) controls secondary output voltage with disconnection.
Advantage of the present invention is: design former limit, secondary controller simultaneously, can control ICPT system former limit resonance current and secondary output voltage simultaneously, ensures the stable electric power transmission when load disturbance of ICPT system; Former limit, secondary control circuit independent design, do not need to carry out signal communication between former limit, secondary.
Accompanying drawing explanation
Fig. 1: control principle drawing of the present invention.
Fig. 2: control principle drawing embodiment of the present invention.
Number in the figure: S
1, S
2, S
3, S
4---high-frequency inverter circuit igbt, S---boost chopper switching tube, C
1---former limit building-out capacitor, C
2---secondary building-out capacitor, C
f---boost chopper filter capacitor, L
1---former limit electromagnetic coupled coil inductance, L
2---secondary electromagnetic coupled coil inductance, L
f---boost chopper filter inductance, R
l---load equivalent resistance, U
dc---direct-current input power supplying, u
ref---secondary output voltage desired value, M---former limit, secondary electromagnetic coupled coil mutual inductance coefficient, i
ref---former limit resonance current peak value desired value, α---phase shifting angle, d---duty ratio, e
1---former limit resonance current error, e
2---secondary output voltage error.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Be illustrated in figure 1 the control principle drawing of SP (i.e. former limit, secondary controller) type ICPT system, a kind of contact inductive electric energy transmission control unit comprises former limit capacitances in series, secondary Capacitance parallel connection, carries out by high frequency magnetic field the transmission being coupled energy.Former edge is divided by direct voltage source U
dc(1), high-frequency inversion link and former limit resonant network composition.Wherein, high-frequency inversion link is made up of four full-controlled switch pipes and anti-paralleled diode one (2), anti-paralleled diode two (3), anti-paralleled diode three (4) and anti-paralleled diode four (5), DC input voitage is converted to high frequency square wave voltage and outputs to former limit resonant network.Former limit resonant network is by building-out capacitor C
1(7) with primary coil inductance L
1(8) in series, its role is to convert high frequency square wave voltage to high frequency sinusoidal resonance current, and produce high frequency magnetic field around primary coil (8).
Wherein, secondary part comprises secondary series resonant network, uncontrollable rectifier bridge (11), boosting rectifier control network and load R
l(16), by the coupling between the circle of former and deputy sideline, secondary coil inductance L
2(9) produce induced electromotive force on, and realize resonance by secondary series resonant network.Secondary resonant network is by building-out capacitor C
2and secondary coil inductance L (10)
2(9) compose in parallel, be mainly used in improving power transmission efficiency, and then strengthen the power delivery performance of system.Uncontrollable rectifier bridge (11) is for the rectification of high frequency ac signal, and boosting rectifier control network is by filter inductance L
f(12), filter capacitor C
f(15), diode (14) and full-controlled switch pipe S (13) composition, be mainly used in regulation output voltage, reduce output voltage ripple, simultaneously effective harmonic inhabitation electric current.
Closed-loop path, former limit in said apparatus realizes as follows:
1), former limit resonance current is detected by current transformer (6);
2) effective value of resonance current, is calculated by signal processing module (23);
3), the resonance current effective value obtained and resonance current effective value desired value are compared in former limit comparator (22) obtain resonance current error;
4), resonance current error is input to former limit controller (21) as input signal;
5), former limit controller (21) output signal controls to export phase shifting angle, as input signal input phase modulation module (19) by former limit amplitude limiter (20);
6), phase modulation module (19) produces the gate-control signal of high-frequency inverter circuit, inputs former limit driver (18) and controls high-frequency inverter circuit, and then control former limit input voltage as input signal;
7), former limit resonance current is controlled by controlling former limit input voltage.
Secondary closed-loop path realizes as follows:
1), secondary output voltage is detected by voltage transformer (17);
2), the output voltage obtained and output voltage desired value are compared in secondary amplitude limiter (26) obtain output voltage error;
3), output voltage error is input to secondary controller (27) as input signal;
4), secondary controller (27) output signal controls output duty cycle, as input signal input duty cycle modulation module (25) by secondary amplitude limiter (26);
5), duty ratio modulation module (25) produces the switching signal of boost chopper, controls conducting and the disconnection of boost chopper switching tube (13) as input signal input secondary driver (24);
6) conducting, by controlling boost chopper switching tube (13) controls secondary output voltage with disconnection.
Fig. 2 is a kind of simple application in SP type ICPT system of the present invention, and the former limit in figure, secondary controller are specially former limit PID controller (21), secondary PID controller (27).
The parameter on limit, Fig. 2 Central Plains PID controller (21) is K
p=0.0002, K
i=3, K
d=0.0003; The parameter of secondary PID controller (27) is K
p=0.0165, K
i=3.9, K
d=0.001.Get former limit resonance current effective value desired value i
ref=41A, secondary output voltage desired value u
ref=70V.
Closed-loop path, former limit realizes as follows:
1), former limit resonance current i is detected by current transformer (6)
p(t);
2) effective value of resonance current, is calculated by signal processing module (23)
3) the resonance current effective value I, will obtained
pwith resonance current effective value desired value i
refcompare in former limit comparator (22) and obtain resonance current error e
1=i
ref-I
p;
4), by resonance current error e
1former limit PID controller (21) is input to as input signal;
5), the output signal on former limit PID controller (21) controls to export phase shifting angle α by former limit amplitude limiter (20), and α is as input signal input phase modulation module (19);
6), phase modulation module (19) produces the gate-control signal of high-frequency inverter circuit, inputs former limit driver (18) and controls high-frequency inverter circuit, and then control former limit input voltage as input signal;
7), former limit resonance current i is controlled by controlling former limit input voltage
p.
Secondary closed-loop path realizes as follows:
1), secondary output voltage u is detected by voltage transformer (17)
o;
2) the output voltage u, will obtained
owith output voltage desired value u
refcompare in secondary comparator (28) and obtain output voltage error e
2=u
ref-u
o;
3), by output voltage error e
2secondary PID controller (27) is input to as input signal;
4), the output signal of secondary PID controller (27) controls output duty cycle d, as input signal input duty cycle modulation module (25) by secondary amplitude limiter (26);
5), duty ratio modulation module (25) produces the switching signal of boost chopper switching tube, controls conducting and the disconnection of boost chopper switching tube (13) as input signal input secondary driver (24);
6) conducting, by controlling boost chopper switching tube (13) controls secondary output voltage with disconnection.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a contact inductive electric energy transmission control unit, comprise former edge to divide and secondary part, it is characterized in that: described former edge is divided into capacitances in series, described secondary part is Capacitance parallel connection, described former limit and secondary both sides are respectively equipped with two closed loops, design an independent control in each closed loop, control former limit resonance current and secondary output voltage simultaneously.
2. a kind of contact inductive electric energy transmission control unit according to claim 1, is characterized in that: described former edge is divided by direct voltage source U
dc(1), high-frequency inversion link and former limit resonant network composition.
3. a kind of contact inductive electric energy transmission control unit according to claim 2, it is characterized in that: described high-frequency inversion link is made up of four full-controlled switch pipes and anti-paralleled diode one (2), anti-paralleled diode two (3), anti-paralleled diode three (4) and anti-paralleled diode four (5), and DC input voitage is converted to high frequency square wave voltage and outputs to former limit resonant network by described high-frequency inversion link.
4. a kind of contact inductive electric energy transmission control unit according to claim 2, is characterized in that: described former limit resonant network is by building-out capacitor C
1(7) with primary coil inductance L
1(8) in series, its role is to convert high frequency square wave voltage to high frequency sinusoidal resonance current, and produce high frequency magnetic field around primary coil (8).
5., according to the arbitrary described a kind of contact inductive electric energy transmission control unit of claim 2-4, it is characterized in that: described secondary part comprises secondary series resonant network, uncontrollable rectifier bridge (11), boosting rectifier control network and load R
l(16), by the coupling between the circle of former and deputy sideline, secondary coil inductance L
2(9) produce induced electromotive force on, and realize resonance by secondary series resonant network.
6. a kind of contact inductive electric energy transmission control unit according to claim 5, is characterized in that: described secondary resonant network is by building-out capacitor C
2and secondary coil inductance L (10)
2(9) compose in parallel.
7. a kind of contact inductive electric energy transmission control unit according to claim 6, is characterized in that: described uncontrollable rectifier bridge (11) is for the rectification of high frequency ac signal, and described boosting rectifier control network is by filter inductance L
f(12), filter capacitor C
f(15), diode (14) and full-controlled switch pipe S (13) composition.
8. a control method according to claim 7, is characterized in that: the performing step of closed-loop path, described former limit:
1), former limit resonance current is detected by current transformer (6);
2) effective value of resonance current, is calculated by signal processing module (23);
3), the resonance current effective value obtained and resonance current effective value desired value are compared in former limit comparator (22) obtain resonance current error;
4), resonance current error is input to former limit controller (21) as input signal;
5), former limit controller (21) output signal controls to export phase shifting angle, as input signal input phase modulation module (19) by former limit amplitude limiter (20);
6), phase modulation module (19) produces the gate-control signal of high-frequency inverter circuit, inputs former limit driver (18) and controls high-frequency inverter circuit, and then control former limit input voltage as input signal;
7), former limit resonance current is controlled by controlling former limit input voltage.
9. a kind of contact inductive electric energy transfer control method according to claim 8, is characterized in that:
The performing step of described secondary closed-loop path:
1), secondary output voltage is detected by voltage transformer (17);
2), the output voltage obtained and output voltage desired value are compared in secondary amplitude limiter (26) obtain output voltage error;
3), output voltage error is input to secondary controller (27) as input signal;
4), secondary controller (27) output signal controls output duty cycle, as input signal input duty cycle modulation module (25) by secondary amplitude limiter (26);
5), duty ratio modulation module (25) produces the switching signal of boost chopper, controls conducting and the disconnection of boost chopper switching tube (13) as input signal input secondary driver (24);
6) conducting, by controlling boost chopper switching tube (13) controls secondary output voltage with disconnection.
10. a kind of contact inductive electric energy transfer control method according to claim 9, it is characterized in that: described former limit, secondary controller are specially former limit PID controller (21), secondary PID controller (27), the parameter of described former limit PID controller (21) is K
p=0.0002, K
i=3, K
d=0.0003; The parameter of secondary PID controller (27) is K
p=0.0165, K
i=3.9, K
d=0.001, described former limit resonance current effective value desired value i
ref=41A, secondary output voltage desired value u
ref=70V
Closed-loop path, described former limit realizes as follows:
1), former limit resonance current i is detected by current transformer (6)
p(t);
2) effective value of resonance current, is calculated by signal processing module (23)
3) the resonance current effective value I, will obtained
pwith resonance current effective value desired value i
refcompare in former limit comparator (22) and obtain resonance current error e
1=i
ref-I
p;
4), by resonance current error e
1former limit PID controller (21) is input to as input signal;
5), the output signal on former limit PID controller (21) controls to export phase shifting angle α by former limit amplitude limiter (20), and α is as input signal input phase modulation module (19);
6), phase modulation module (19) produces the gate-control signal of high-frequency inverter circuit, inputs former limit driver (18) and controls high-frequency inverter circuit, and then control former limit input voltage as input signal;
7), former limit resonance current i is controlled by controlling former limit input voltage
p;
Described secondary closed-loop path realizes as follows:
1), secondary output voltage u is detected by voltage transformer (17)
o;
2) the output voltage u, will obtained
owith output voltage desired value u
refcompare in secondary comparator (28) and obtain output voltage error e
2=u
ref-u
o;
3), by output voltage error e
2secondary PID controller (27) is input to as input signal;
4), the output signal of secondary PID controller (27) controls output duty cycle d, as input signal input duty cycle modulation module (25) by secondary amplitude limiter (26);
5), duty ratio modulation module (25) produces the switching signal of boost chopper switching tube, controls conducting and the disconnection of boost chopper switching tube (13) as input signal input secondary driver (24);
6) conducting, by controlling boost chopper switching tube (13) controls secondary output voltage with disconnection.
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