CN204408233U

CN204408233U - Switchette magnetic resistance wind-driven generator half self-excitation Cuk type power converter topologies

Info

Publication number: CN204408233U
Application number: CN201420869466.0U
Authority: CN
Inventors: 孙冠群
Original assignee: China Jiliang University
Current assignee: China Jiliang University
Priority date: 2014-12-30
Filing date: 2014-12-30
Publication date: 2015-06-17
Anticipated expiration: 2024-12-30

Abstract

Switchette magnetic resistance wind-driven generator half self-excitation Cuk type power converter topologies, be made up of new power inverter main circuit, Cuk chopper circuit, DC/DC converter, load, it is characterized in that, described new power inverter main circuit exciting voltage input is connected with described Cuk chopper circuit output, the generating output that described DC/DC converter is parallel to new power inverter main circuit is simultaneously in parallel with described load, and the another two ends of DC/DC converter are connected with the input two ends in Cuk chopper circuit; This topological structure is simple and practical, flexibly changing exciting voltage, can be used for switchette magnetic resistance wind generator system power inverter field.

Description

Switchette magnetic resistance wind-driven generator half self-excitation Cuk type power converter topologies

Technical field

The present invention relates to switched reluctance machines and control field thereof, be specifically related to a kind of topological structure of power inverter novel excitation mode of switchette magnetic resistance wind-driven generator.

Background technology

Clean, green, that environmental protection is mark wind power generation is the renewable energy power generation form given priority to both at home and abroad so far for many years.

Switch reluctance generator structure is simple, brushless on rotor, without winding, without permanent magnet; It is equivalent to a current source when running, and like this in certain range of speeds, output end voltage can not change along with the change of rotating speed, and this is very suitable for the wind energy conversion system of the variable-speed operation of current main-stream, can improve the utilization ratio of wind energy; Switch reluctance generator low speed controllability is good, thus can save gear box under wind-force Direct driver, and make whole power generation system structure more succinct, reliable while realizing higher generating efficiency, this is also the development trend of wind generator system; And in running, switch reluctance generator controllable parameter is many, as switching angle control, Current cut control, PWM control, the control strategy of more complicated can be realized easily, control output dc voltage and electric current flexibly; But want the many merits playing switch reluctance generator, basis primary in operation is that Switched Reluctance GeneratorUsed in Wind Energy Converter System can obtain maximum power output.

About the power inverter main circuit of switch reluctance generator, known asymmetrical half-bridge formula is the most ripe, under coordinating certain control model, can timesharing, different circuit conveniently realize excitation and generating; But its each phase winding all will take two electronic power switch pipes and two Power Diode Pumped, and structure is comparatively complicated.

About the excitation mode of switch reluctance generator, there are separate excitation and self-excitation two kinds; According to switch reluctance generator operation principle, the size of its exciting voltage known affects its exciting current size, and then have influence on the size of its power output, that is, increasing exciting voltage is increase one of exciting current and then the mode increasing switch reluctance generator power output, traditional excitation mode is fixed excitation voltage (traditional separate excitation) mostly or becomes in response to output voltage (tradition self-excitation), does not almost carry out the software and hardware method of special adjustment in real time for exciting voltage; There are some in the research and practice of this respect in recent years, comprise: 1. the Deng Qiu tinkling of pieces of jade, Huang is held on even to dead in order to perfect one's virtue. improve the measure [J] of switch reluctance generator power output. and small and special electric machine, 4th phase in 2008. this document propose a kind of switch reluctance generator power converter topologies structure, exciting voltage can be made to double, but increase the weight of the complexity of circuit, and can only convert between two magnitudes of voltage, can not smooth adjustment exciting voltage; Also has document 2. Peng Han plum, easy glossy ganoderma etc. based on the switch reluctance generator novel excitation pattern [J] of Buck converter. solar energy journal, 3rd phase in 2012. this article proposes a kind of new power inverter main circuit being different from asymmetrical half-bridge formula, main circuit structure decreases the electric component consumption of half, its exciting voltage adopts Buck chopper circuit to regulate simultaneously, smoothly can change exciting voltage, achieve very large progress.

Summary of the invention

According to above existing background technology, the utility model proposes a kind of new power inverter main circuit adopting simplified structure, the novel separate excitation mode that neither belongs to that exciting voltage is undertaken regulating by Cuk chopper circuit does not belong to self-excitation mode and the switching magnetic-resistance wind-driven generator power converter topologies structure being called half self-excitation mode yet, can be used for switchette magnetic resistance wind powered generator system field.

The technical solution of the utility model is:

Switchette magnetic resistance wind-driven generator half self-excitation Cuk type power converter topologies, be made up of new power inverter main circuit 1, Cuk chopper circuit 2, DC/DC converter 3, load R, it is characterized in that, described new power inverter main circuit 1 exciting voltage input is connected with described Cuk chopper circuit 2 output, the generating output that described DC/DC converter 3 is parallel to new power inverter main circuit 1 is simultaneously in parallel with described load R, and the another two ends of DC/DC converter 3 are connected with the input two ends in Cuk chopper circuit 2.

Input DC power in described Cuk chopper circuit 2 is storage battery X, when its electric energy is not enough, receives the electric energy that new power inverter main circuit 1 exports charge to it by DC/DC converter 3; The rated voltage of storage battery X is less than the output rated voltage of new power inverter main circuit 1; By the adjustment of the duty ratio to electronic power switch pipe V4 unique in Cuk chopper circuit 2, the exciting voltage exporting to new power inverter main circuit 1 can be changed.

Major technique effect of the present utility model is:

Switchette magnetic resistance wind-driven generator of the present utility model half self-excitation Cuk type power converter topologies, new power inverter main circuit 1 relatively asymmetrical half-bridge formula power inverter main circuit has used the electric component of half less; Cuk chopper circuit 2 changes exciting voltage, thus provides convenience for maximal power tracing obtains, and widened the flexibility of Systematical control, and the output ripple current of Cuk chopper circuit 2 is little, output voltage inputs changeable relatively, and adjustable extent is wide.

Topology of the present utility model, unlike traditional separate excitation pattern, need running check to safeguard the situation of the storage battery X for excitation, it is by DC/DC converter 3, when storage battery X both end voltage is lower than limit value, the electric energy that automatic reception sends from DC/DC converter 3 i.e. generating set, so have the character of self-excitation, but under really not having traditional self-excitation pattern, field power supply is pulsed large shortcoming; Simultaneously because of storage battery X voltage stabilization, have during electricity and obtain stable exciting voltage by the effect of electronic power switch pipe V4 completely, so also have separate excitation pattern character concurrently, be therefore called half self-excitation or half separate excitation pattern.

Accompanying drawing explanation

Figure 1 shows that switchette magnetic resistance wind-driven generator of the present utility model half self-excitation Cuk type power converter topologies circuit structure diagram.

Embodiment

As shown in Figure 1, in new power inverter main circuit 1, A/B/C is three cover phase windings of switch reluctance generator, and often overlap phase winding and independently control, electronic power switch pipe V1-V3 is generally IGBT, according to the generator rotor position signal that switch reluctance generator control system detects, after determining which phase winding needs excitation, for example instantly for A phase winding needs excitation, then V1 closes, Cuk chopper circuit 2 produces exciting current and flows through A winding and V1 under output voltage effect, now according to control and detect signal deciding Cuk chopper circuit 2 output voltage size and determined by the duty ratio of the electronic power switch pipe V4 of its inside, V4 is generally IGBT, set up until A winding exciting current and reach after to provisioning request, V1 turns off, now because winding A is perception, there is magnetic energy, as can be seen from Fig. 1, now Power Diode Pumped D1 will export electric energy to external loading R and other energy-storage travelling wave tubes for its afterflow, capacitor Cd plays burning voltage and filtering, until generator amature turns over certain angle, be transitioned into the course of work that next phase winding repeats as above, so repeatedly, continuous excitation and export electric energy.

Cuk chopper circuit 2 is by storage battery X, electronic power switch pipe V4, reactor L1 and L2, capacitor C1, Power Diode Pumped D4 forms, storage battery X generally remains on about rated capacity, institute's short of electricity energy is supplied by DC/DC converter 3, the change of the duty ratio of electronic power switch pipe V4, determine the exciting voltage size that generator windings exported to by Cuk chopper circuit 2, the exciting current size of known switches reluctance generator is not determined by exciting voltage separately, also with relating to parameters such as its rotating speeds, so, Cuk chopper circuit 2 output voltage of expectation is provided in the total size that generator control system controller must control at maximal power tracing, the break-make moment of namely concrete electronic power switch pipe V4 and PWV1 ripple duty ratio.

Although the three-phase windings switch reluctance generator that the present embodiment adopts, do not affect the protection of the utility model to other different number of phases situations.

Claims

1. switchette magnetic resistance wind-driven generator half self-excitation Cuk type power converter topologies, by new power inverter main circuit (1), Cuk chopper circuit (2), DC/DC converter (3), load (R) forms, it is characterized in that, described new power inverter main circuit (1) exciting voltage input is connected with described Cuk chopper circuit (2) output, the generating output that described DC/DC converter (3) is parallel to new power inverter main circuit (1) is simultaneously in parallel with described load (R), the another two ends of DC/DC converter (3) are connected with the input two ends in Cuk chopper circuit (2).

2. switchette magnetic resistance wind-driven generator according to claim 1 half self-excitation Cuk type power converter topologies, it is characterized in that, the input DC power in described Cuk chopper circuit (2) is storage battery (X).