CN109245629A

CN109245629A - The FOC control system of no electrolytic capacitor magneto

Info

Publication number: CN109245629A
Application number: CN201811173740.XA
Authority: CN
Inventors: 邓永忠
Original assignee: FOSHAN SHUNDE H&T ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: FOSHAN SHUNDE H&T ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2018-10-09
Filing date: 2018-10-09
Publication date: 2019-01-18

Abstract

The invention discloses a kind of magneto FOC control systems of no electrolytic capacitor, on the basis of traditional FOC control program, increase function of voltage module Rate, in addition have modified MTPA module.Row normalization is carried out as function of voltage to input voltage to be multiplied with speed ring output Is, then carries out Id and Iq decoupling again.The present invention is on the basis of traditional FOC control, only needing to increase seldom operand can be realized the thin-film capacitor that the big electrolytic capacitor in traditional topological circuit is substituted for very little, higher power factor can also be obtained simultaneously, and the parameter of the speed ring and electric current loop in control system remains unchanged, it realizes and ideal control effect is obtained with the smallest cost, avoid and make dramatically changing for control system because of the cost declining of application.

Description

The FOC control system of no electrolytic capacitor magneto

Technical field

The present invention relates to motor-drive technique fields, control more particularly to a kind of FOC of no electrolytic capacitor magneto System.

Background technique

Currently, magneto driving mainstream is all using topology shown in Fig. 1, i.e. power supply passes through inductance L, using rectification Then bridge is filtered pressure stabilizing by electrolytic capacitor C, finally exported by each bridge arm.Generally for system is operated normally, it is electrolysed Generally all value is bigger for capacitor, and the cost of manufacture of such system is relatively high, and the topology greatest drawback is system Power factor is low in operational process, does not meet requirement of the power grid to power factor.

To cope with above two reason, occur in recent years using big in small 1 topology of thin-film capacitor alternate figures Electrolytic capacitor makes the motor driven side power moment be equal to mains input side power by using power balance theory, and meets Constant ideal conditions, that is, source side power factor is 1.The hardware cost for greatly reducing system in this way simplifies Fig. 1 topology Auxiliary circuit.But it is this change so that control operation complexity be significantly increased, increase the debugging difficulty of system.

Summary of the invention

In view of the existing technical defect, this invention address that providing a kind of FOC control of no electrolytic capacitor magneto System processed reduces the complexity of control operation when big electrolytic capacitor is substituted for thin-film capacitor.

To achieve the goals above, the technical solution adopted by the present invention is as follows.

A kind of magneto FOC control system of no electrolytic capacitor, including speed ring module, function of voltage module and MTPA Module,

Function of voltage module includes peak value module, amplification module and normalization module, and input signal is alternating voltage, exchange Voltage passes through peak value module all the way and obtains alternating voltage peak, carries out the amplification of 2 12 powers times by amplification module all the way, Module is normalized by amplified alternating voltage divided by alternating voltage peak, obtains the function of voltage no more than 1；

MTPA module includes multiplier module and decoupling module, and the reference current Is of speed ring ASR module output inputs multiplication Module, function of voltage also input multiplier module, and the reference current changed with voltage peak is obtained after the multiplication of multiplier module Is, with the reference current Is output valve decoupling module that voltage peak changes, decoupling module exports the reference current of dq axis.

The present invention has the characteristics that certain regulating power using speed ring PI, and ASR link output bandwidth is relatively low Usually in 15rad/sec, thus ASR link export Is on the basis of multiplied by function of voltage module Rate output, obtain with The Is reference current of voltage change, Is are decoupled to obtain system dq axis reference current by MTPA, remaining controlling unit with Traditional FOC control is consistent.The present invention is on the basis of traditional FOC control, it is only necessary to increase seldom operand can be realized by Big electrolytic capacitor in traditional topological circuit is substituted for the thin-film capacitor of very little, while can also obtain higher power factor, And the parameter of the speed ring and electric current loop in control system remains unchanged, and realizes and obtains ideal control with the smallest cost Effect avoids and makes dramatically changing for control system because of the cost declining of application.

Detailed description of the invention

Fig. 1 is the topological structure schematic diagram of traditional magneto driving circuit；

Fig. 2 is the schematic diagram of magneto FOC control circuit；

Fig. 3 is the schematic diagram of function of voltage module；

Fig. 4 is the schematic diagram of MTPA module；

Fig. 5 is using the solution of the present invention to the tracing figure of magneto speed；

Fig. 6 is the speed tracing figure for the no electrolytic capacitor magneto realized using power balance theory；

Fig. 7 is using the solution of the present invention to the tracing figure of magneto dq shaft current；

Fig. 8 is the tracing figure for the no electrolytic capacitor magneto dq shaft current realized using power balance theory；

Fig. 9 is using the solution of the present invention to the tracing figure of magneto source current；

Figure 10 is the tracing figure for the no electrolytic capacitor magneto source current realized using power balance theory.

Specific embodiment

The embodiment of the present invention is illustrated with reference to the accompanying drawing.

It mainly include speed ring ASR module, electric current loop if the controlling unit of Fig. 2 system follows traditional FOC controlling unit ACR module, position estimation, transform part TRANS, MTPA module, weak magnetic module WKFLX and SPWM module, and sampling Module.The design increases function of voltage module Rate, in addition has modified MTPA module.

The present invention mainly on the basis of traditional FOC control algolithm, increases the operation of function of voltage, about voltage letter Number is mainly the desire to obtain the function that an output is not more than 1, and the function and voltage ratio reduce.It therefore is to seek this Function, we must acquire the peak value of voltage, seek about peak value, it is intended that it can follow the variation of voltage peak in due course and Variation, while it is too fast also to wish that it will not change, thus we will also be filtered when tentatively obtaining voltage peak, thus The smooth transition of realization system.The function is also suitable when input is three phase mains.

1, the realization of function of voltage:

As shown in figure 3, being divided into two-way after voltage Vac input, wherein peaking is used for all the way, in addition all the way in amplification 2 It removes after 12 powers times in the output of peak value module, to obtain the function of voltage that maximum value is no more than 1.

2, the MPTA module after changing

As shown in figure 4, when tradition FOC is controlled, IsRef be directly inputted to the seeking of rear end MTPA angle, IdRef and The calculating of IqRef, the link being multiplied without IsRef with function of voltage output Rate.

Realize effect:

1, using tracking situation such as Fig. 5 of simple no electrolytic capacitor scheme speed, the nothing realized using power balance theory The velocity tracking scenario of electrolytic capacitor scheme such as Fig. 6.The speed tracing effect that two methods obtain is almost the same, introducing 100Hz vibration amplitude is also almost the same.

2, using tracking situation such as Fig. 7 of simple no electrolytic capacitor control program Id and Iq, power balance theory reality is used Tracking situation such as Fig. 8 of existing no electrolytic capacitor scheme Id and Iq are more preferable than easy scheme tracking.

3, simple no electrolytic capacitor scheme source current such as Fig. 9 slightly has some distortion from bottom recovery process in voltage, But power factor also can be relatively high.Power balance theory realize no electrolytic capacitor scheme source current such as Figure 10, have than The slightly higher power factor of simple no electrolytic capacitor scheme.

In summary some, the FOC control program of the easy no electrolytic capacitor magneto of the present invention is put down with according to power The no electrolytic capacitor control program that the principle that weighs is realized there is no difference both on speed tracing；But Id's and Iq Tracking is slightly almost than the latter；And in the power factor of power supply, the latter is slightly strong.But answering in some inexpensive low-costs Have the development cycle short with the simple control program of occasion, verifying cost is low, and the feature that software upgrading is easy.

The control of no electrolytic capacitor magneto, this system may be implemented using the present invention under single phase poaer supply application scenarios With scalability, the occasion using three phase power application can extend to, the present invention is used under three phase power application scene The control of no electrolytic capacitor magneto may be implemented.

Embodiments of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but can not Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art, Under the premise of not departing from present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention. Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims

1. a kind of magneto FOC control system of no electrolytic capacitor, which is characterized in that

Including speed ring module, function of voltage module and MTPA module,

Function of voltage module includes peak value module, amplification module and normalization module, and input signal is alternating voltage, alternating voltage Alternating voltage peak is obtained by peak value module all the way, carries out the amplification of 2 12 powers times, normalization by amplification module all the way Amplified alternating voltage divided by alternating voltage peak, is obtained the function of voltage no more than 1 by module；

MTPA module includes multiplier module and decoupling module, and the reference current Is of speed ring ASR module output inputs multiplier module, Function of voltage also inputs multiplier module, and the reference current Is changed with voltage peak is obtained after the multiplication of multiplier module, with The reference current Is output valve decoupling module of voltage peak variation, decoupling module export the reference current of dq axis.

2. the magneto FOC control system of no electrolytic capacitor according to claim 1, which is characterized in that

The alternating voltage of function of voltage module input can be single-phase voltage or three-phase voltage.