CN102843076B - 旋转电机控制装置 - Google Patents
旋转电机控制装置 Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/60—Controlling or determining the temperature of the motor or of the drive
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/46—Series type
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Abstract
本发明提供一种旋转电机控制装置,其既能防止多个电机过热又能确保所期望的输出。温度判定部(25)算出行驶用电机(11)和第一PDU(14)相对于预定的保护温度的电机富余温度△Tmot以及发电用电机(13)和第二PDU(15)相对于预定的保护温度的发电机富余温度△Tgen。主控制部(27)参照电机损失最小电压映射图和发电机损失最小电压映射图来算出各电机(11、13)的损失最小电压即电机电压Vmot和发电机电压Vgen。热平衡电压计算部(26)根据各电压Vmot、Vgen和各富余温度△Tmot、△Tgen算出在各电机(11、13)和各PDU(14、15)是热平衡状态时的各PDU(14、15)的直流侧电压(DC/DC转换器(16)的二次侧电压)即热平衡电压Vtar。主控制部(27)以热平衡电压Vtar作为目标电压V。
Description
技术领域
本发明涉及一种旋转电机控制装置。
背景技术
以往,例如公知有如下所述的旋转电机控制装置:在一种串联型的混合动力车辆中,对各电机执行这样的处理:根据各电机的磁铁温度,通过降低升压转换器的输出电压来降低磁铁温度,所述串联型的混合动力车辆具备:驱动车辆的驱动轮的行驶用电机;与车辆的内燃机联结的发电用电机;用来控制各电机的、基于脉宽调制的逆变器;以及将直流电源的直流电压升压后提供给各逆变器的升压转换器。
现有技术文献
专利文献1:日本特开2008-206339号公报
然而,根据上述以往技术的旋转电机控制装置,由于升压转换器的输出电压(即,两个逆变器的直流侧电压)对于两个逆变器是通用的,因此当根据行驶用电机和发电用电机中的任一方的磁铁温度来控制升压转换器的输出电压时,即使输出电压对于行驶用电机和发电用电机中的一方是适当的,也存在着输出电压对于另一电机为不适当的情况,例如有可能产生这样的不利情况:在另一电机中,磁铁温度过度上升,过度限制了另一电机的输出。
发明内容
本发明正是鉴于上述情况而完成的,其目的在于提供一种既能够防止多个电机过热又能确保所期望的输出的旋转电机控制装置。
为了解决上述问题而实现所述目的,本发明第一方面的旋转电机控制装置利用旋转电机(例如,实施方式中的行驶用电机11、发电用电机13)和对该旋转电机进行通电控制的通电控制单元(例如,实施方式中的第一PDU14、第二PDU15)构成旋转电机控制单元(例如,实施方式中的旋转电机控制部41、42),该旋转电机控制装置具备:负荷不同的多个所述旋转电机控制单元;以及目标电压设定单元(例如,实施方式中的MGECU18),其根据在多个所述旋转电机控制单元处于热平衡状态时的所述直流侧电压即热平衡电压来设定多个所述旋转电机控制单元的针对直流侧电压的目标电压。
并且,在本发明第二方面的旋转电机控制装置中,所述目标电压设定单元根据每个所述旋转电机控制单元相对于所述热平衡状态的温度富余度来计算所述热平衡电压。
并且,在本发明第三方面的旋转电机控制装置中,针对每个所述旋转电机控制单元具备损失最小电压计算单元(例如,实施方式中的主控制部27、步骤S11、步骤S12),该损失最小电压计算单元根据所述旋转电机的转速和转矩来计算损失最小电压,该损失最小电压是在运转损失为最小的状态时的所述直流侧电压,所述目标电压设定单元根据所述损失最小电压计算所述热平衡电压。
并且,在本发明第四方面的旋转电机控制装置中,多个所述旋转电机具有同样的运转特性。
并且,在本发明第五方面的旋转电机控制装置中,所述旋转电机控制单元为两个,其中一个旋转电机控制单元的旋转电机为电动机,另一个旋转电机控制单元的旋转电机为发电机。
发明效果
根据本发明的第一方面的旋转电机控制装置,由于多个旋转电机控制单元被控制成为热平衡状态,因此能够防止多个旋转电机控制单元中的一部分的旋转电机控制单元变为过热状态。并且,与仅考虑多个旋转电机控制单元中的一部分的旋转电机控制单元的状态来设定目标电压的情况相比,能够更灵活且在更少的限制下进行运转。
根据本发明的第二方面的旋转电机控制装置,能够恰当地算出热平衡电压,该热平衡电压用来防止多个旋转电机控制单元中的一部分的旋转电机控制单元变为过热状态。
根据本发明的第三方面的旋转电机控制装置,能够恰当地降低多个旋转电机控制单元整体上的运转损失。
根据本发明的第四方面的旋转电机控制装置,可以认为,对于具有同一运转特性的多个旋转电机,即使以任一个为对象来算出损失最小电压,并根据该损失最小电压来算出在多个旋转电机控制单元为热平衡状态时的热平衡电压,多个旋转电机控制单元整体上的运转损失也不会随着以哪个旋转电机为对象来算出损失最小电压而发生变化。
由此,能够减少在设定目标电压时所需的处理负荷。
根据本发明的第五方面的旋转电机控制装置,即便是具备使用目的不同的电动机和发电机的车辆,即使以电动机或发电机为对象来算出输出电压,也不会过于限制任一方的输出而能够进行灵活的运转。
附图说明
图1是本发明实施方式的旋转电机控制装置的结构图。
图2是本发明实施方式的旋转电机控制装置的MGECU的结构图。
图3是示出本发明实施方式的旋转电机控制装置的保护温度和电机富余温度及发动机富余温度的一个示例的图。
图4是示出本发明实施方式的旋转电机控制装置的热平衡电压和电机电压及发电机电压的一个示例的图。
图5是示出本发明实施方式的旋转电机控制装置的动作的流程图。
图6是示出本发明实施方式的旋转电机控制装置的动作的流程图。
图7是示出本发明实施方式的变形例的旋转电机控制装置的动作的流程图。
图8是示出本发明实施方式的变形例的旋转电机控制装置的动作的流程图。
标号说明:
1:混合动力车辆;10:旋转电机控制装置;11:行驶用电机(旋转电机、电动机);12:内燃机;13:发电用电机(旋转电机、发电机);14:第一PDU(通电控制单元);15:第二PDU(通电控制单元);18:MGECU(目标电压设定单元);25:温度判定部;27:主控制部(损失最小电压计算单元);28:动力指示部;31:SOC检测部;32:油门开度传感器;41:旋转电机控制部(旋转电机控制单元);42:旋转电机控制部(旋转电机控制单元)。
具体实施方式
下面,参照附图对本发明的一个实施方式的旋转电机控制装置进行说明。
本实施方式的旋转电机控制装置10安装于例如图1所示的混合动力车辆1中,该混合动力车辆1例如是串联型的混合动力车辆,其中,行驶用电机(MOT)11与驱动轮W联结,发电用电机(GEN)13与内燃机(ENG)12的曲轴12a联结。
各电机11、13例如是三相DC无刷电机等,并且与控制各电机11、13的各电力传动单元(PDU)14、15连接。
各PDU14、15例如构成为具备基于脉宽调制(PWM)的PWM逆变器,所述PWM逆变器具备桥接电路,该桥接电路采用多个晶体管等开关元件桥接而成。
并且,各PDU14、15例如经由DC/DC转换器16而与电池(BATT)17连接。
DC/DC转换器16例如能够将电池(BATT)17的端子间电压升压或降压至预定的电压后施加到各PDU14、15,并且能够将各PDU14、15的端子间电压(直流侧电压)降压或升压至预定的电压来对电池17进行充电。
并且,例如在行驶用电机11进行驱动时,第一PDU14将由DC/DC转换器16或发电用电机13的第二PDU15提供的直流电力转换为交流电力后提供给行驶用电机11。
此外,在利用例如内燃机12的动力使发电用电机13进行发电时,第二PDU15将由发电用电机13输出的交流的发电电力转换为直流电力,从而经由DC/DC转换器16对电池17进行充电,或向行驶用电机11的第一PDU14提供电力。
此外,当在例如混合动力车辆1进行减速等时,驱动力由驱动轮W侧被传递到行驶用电机11侧时,行驶用电机11作为发电机来发挥功能,从而产生所谓的再生制动力,将车体的动能回收为电能。在该行驶用电机11进行发电时,第一PDU14将由行驶用电机11输出的交流的发电(再生)电力转换为直流电力,从而经由DC/DC转换器16向电池17充电。
并且,旋转电机控制装置10作为利用例如CPU(Central Processing Unit:中央处理单元)等电子电路构成的ECU(Electronic Control Unit:电子控制单元),其具备对混合动力车辆1综合地进行控制的MGECU18。
例如如图2所示,MGECU18构成为具备:存储器21、计时器22、SOC判定部23、油门开度判定部24、温度判定部25、热平衡电压计算部26、主控制部27和动力指示部28。
SOC判定部23根据例如由SOC检测部31输出的检测信号获得电池17的剩余容量,所述SOC检测部31用来检测电池17的剩余容量(例如,表示相对于充满电状态的电量(或者电力量等)的比例的SOC:State Of Charge)。
油门开度判定部24根据由油门开度传感器32输出的检测信号获得油门开度,所述油门开度传感器32用来检测混合动力车辆1的驾驶者踩踏油门踏板所产生的油门踏板的冲程量(油门开度)。
温度判定部25根据例如由各芯片温度检测部33、34输出的检测信号和由各磁铁温度检测部35、36输出的检测信号获得各温度,所述各芯片温度检测部33、34用来检测构成第一PDU14和第二PDU15的PWM逆变器等的芯片(省略图示)的温度,所述各磁铁温度检测部35、36用来检测构成各电机11、13的永磁铁(省略图示)的温度。
再者,关于各磁铁温度检测部35、36,取代直接检测永磁铁的温度,也可以参照通过预先执行的试验等而得到的预定的映射图(例如,示出各电机11、13的冷却介质的温度与永磁铁的温度的对应关系的映射图等),根据另一温度检测值(例如,各电机11、13的冷却介质的温度的检测结果等)来获得永磁铁的温度。
并且,设预定的保护温度与行驶用电机11的永磁铁的温度的差为磁铁富余温度△Tmot1,设预定的保护温度与第一PDU14的芯片的温度的差为芯片富余温度△Tmot2,设磁铁富余温度△Tmot1与芯片富余温度△Tmot2的和为电机富余温度△Tmot。
此外,设预定的保护温度与发电用电机13的永磁铁的温度的差为磁铁富余温度△Tgen1,设预定的保护温度与第二PDU15的芯片的温度的差为芯片富余温度△Tgen2,设磁铁富余温度△Tgen1与芯片富余温度△Tgen2的和为发电机富余温度△Tgen。
再者,关于预定的保护温度,既可以在各电机11、13和各PDU14、15中为不同的值,也可以在各电机11、13中为相同的值,还可以在各PDU14、15中为相同的值。
此外,例如如图3所示,对于行驶用电机11与第一PDU14的组合(旋转电机控制部41)以及发电用电机13与第二PDU15的组合(旋转电机控制部42),预定的保护温度也可以为相同的值。
热平衡电压计算部26根据利用后述的主控制部27算出的行驶用电机11的电机电压Vmot和发电用电机13的发电机电压Vgen、电机富余温度△Tmot和发电机富余温度△Tgen来计算在各电机11、13和各PDU14、15为热平衡状态时的各PDU14、15的直流侧电压(即,DC/DC转换器16的二次侧电压)即热平衡电压Vtar。
例如,热平衡电压计算部26根据下述算式(1)算出热平衡电压Vtar,在下述算式(1)中,得出例如如图4所示的、电机电压Vmot与热平衡电压Vtar之间的电压差(Vmot-Vtar)和热平衡电压Vtar与发电机电压Vgen之间的电压差(Vtar-Vgen)的比,相等于电机富余温度△Tmot与发电机富余温度△Tgen的比。
[算式1]
主控制部27参照存储在存储器21中的各种数据和计时器22的计时,并且根据各判定部23、24、25的处理结果进行通到例如各电机11、13的电流的反馈控制等,并输出指示各电机11、13的动作的指令信号。
此外,主控制部27根据利用SOC判定部23获得的电池17的剩余容量(SOC)和利用油门开度判定部24获得的油门开度来算出针对各电机11、13的目标转速和目标转矩。
并且,参照存储在存储器21中的预定的映射图、例如示出各电机11、13的转速、转矩以及运转损失最小的电源电压(即,为各PDU14、15的直流侧电压,且为损失最小电压)的对应关系的映射图(电机损失最小电压映射图、发电机损失最小电压映射图)来获得与各电机11、13的目标转速和目标转矩对应的电源电压(损失最小电压)。并且,设所获得的各损失最小电压为行驶用电机11的电机电压Vmot和发电用电机13的发电机电压Vgen。
此外,主控制部27根据由热平衡电压计算部26算出的热平衡电压Vtar来设定各PDU14、15的针对直流侧电压(即,DC/DC转换器16的二次侧电压)的目标电压V,并根据该目标电压V来控制各PDU14、15和DC/DC转换器16的电力转换动作。
动力指示部28根据由主控制部27输出的指令信号来输出用来控制第一PDU14和第二PDU15的电力转换动作的控制信号,并控制行驶用电机11的驱动和发电以及发电用电机13利用内燃机12的动力而进行的发电。
本实施方式的旋转电机控制装置10具备上述结构,下面,对旋转电机控制装置10的动作,特别是设定目标电压V的处理进行说明。
首先,在例如图5所示的步骤S01中,检测油门开度和电池17的剩余容量(SOC)。
然后,在步骤S02中,计算针对各电机11、13的目标转速和目标转矩。
然后,在步骤S03中,执行后述的热平衡电压Vtar的计算处理。
然后,在步骤S04中,根据热平衡电压Vtar设定目标电压V,并结束处理。
下面,对在上述步骤S03中的热平衡电压Vtar的计算处理进行说明。
首先,在例如图6所示的步骤S11中,参照电机损失最小电压映射图来获得与行驶用电机11的目标转速和目标转矩对应的电源电压(损失最小电压),设所获得的损失最小电压为行驶用电机11的电机电压Vmot。
然后,在步骤S12中,参照发电机损失最小电压映射图来获得与发电用电机13的目标转速和目标转矩对应的电源电压(损失最小电压),设所获得的损失最小电压为发电用电机13的发电机电压Vgen。
然后,在步骤S13中,对构成第一PDU14的PWM逆变器等的芯片的温度和行驶用电机11的永磁铁的温度进行检测。并且,设预定的保护温度与行驶用电机11的永磁铁的温度的差为磁铁富余温度△Tmot1,设预定的保护温度与第一PDU14的芯片的温度的差为芯片富余温度△Tmot2,设磁铁富余温度△Tmot1与芯片富余温度△Tmot2的和为电机富余温度△Tmot。
然后,在步骤S14中,对构成第二PDU15的PWM逆变器等的芯片的温度和发电用电机13的永磁铁的温度进行检测。并且,设预定的保护温度与发电用电机13的永磁铁的温度的差为磁铁富余温度△Tgen1,设预定的保护温度与第二PDU15的芯片的温度的差为芯片富余温度△Tgen2,设磁铁富余温度△Tgen1与芯片富余温度△Tgen2的和为发电机富余温度△Tgen。
然后,在步骤S15中,利用下述算数(1)算出热平衡电压Vtar,并进入到返回。
如上所述,根据本实施方式的旋转电机控制装置10,由于各电机11、13和各PDU14、15被控制成为热平衡状态,因此能够防止任一个电机或者任一个PDU为过热状态。并且,与仅考虑各电机11、13和各PDU14、15中的任一个电机或者任一个PDU的状态来设定目标电压V的情况相比,能够更灵活且在更少的限制下进行运转。
并且,能够利用上述算式(1)恰当地算出热平衡电压Vtar,并且能够恰当地减少各电机11、13和各PDU14、15整体上的运转损失。
再者,在上述的实施方式中,各电机11、13也可以构成为具有相同的运转特性。
可以认为,对于具有相同的运转特性的各电机11、13,即使以任一个为对象算出损失最小电压,并根据该损失最小电压算出在各电机11、13和各PDU14、15为热平衡状态时的热平衡电压Vtar,各电机11、13和各PDU14、15整体上的运转损失也不会随着以哪个电机为对象来算出损失最小电压而发生变化。
由此,能够减少在设定目标电压V时所需的处理负荷。
再者,在上述的实施方式中,主控制部27设各电机11、13的各损失最小电压为电机电压Vmot和发电机电压Vgen,但不限于此,也可以根据使例如各电机11、13的弱磁场电流为最小的控制(即,最大电压矢量控制)等来设定电机电压Vmot和发电机电压Vgen。
再者,在上述的实施方式中,温度判定部25使电机富余温度△Tmot为磁铁富余温度△Tmot1与芯片富余温度△Tmot2的和,但也可以再加上线圈温度。
再者,在上述的实施方式中,温度判定部25使发电机富余温度△Tgen为磁铁富余温度△Tgen1与芯片富余温度△Tgen2的和,但也可以再加上线圈温度。
由此,能够考虑随着电压变化而产生的弱磁场电流的影响。
再者,在上述的实施方式中,主控制部27使热平衡电压Vtar为目标电压V,但不限于此,也可以根据需要从例如通过适当的处理而得到的电机电压Vm、发电机电压Vg和热平衡电压Vtar中选择目标电压V。
在该变形例的旋转电机控制装置10的动作中,首先,在例如如图7所示的步骤S21中,对油门开度和电池17的剩余容量(SOC)进行检测。
然后,在步骤S22中,算出针对各电机11、13的目标转速和目标转矩。
然后,在步骤S23中,执行上述的步骤S11至S15的处理,算出热平衡电压Vtar。
然后,在步骤S24中,执行后述的电压Vt的计算处理。
然后,在步骤S25中,根据需要选择电压Vt或者热平衡电压Vtar来设定目标电压V,并结束处理。
再者,在步骤S25中,例如即使设定电压Vt为目标电压V,各电机11、13和各PDU14、15的温度也在预定的保护温度以下时,优先地选择电压Vt为目标电压V,另一方面,当设定电压Vt为目标电压V时,各电机11、13和各PDU14、15中的至少某一个的温度高于预定的保护温度时,选择热平衡电压Vtar为目标电压V。
下面,对在上述的步骤S24中的电压Vt的计算处理进行说明。
首先,在例如如图8所示的步骤S31中,根据行驶用电机11的目标转速和目标转矩,通过预定的运算处理算出电源电压(即,第一PDU14的直流侧电压),将该计算结果作为电机电压Vm。
然后,在步骤S32中,根据发电用电机13的目标转速和目标转矩,通过预定的运算处理算出电源电压(即,第二PDU15的直流侧电压),将该计算结果作为发电机电压Vg。
然后,在步骤S33中,选择电机电压Vm或者发电机电压Vg(例如,某一个较大的一方等)作为电压Vt,并进入到返回。
再者,电机电压Vm和发电机电压Vg例如是各电机11、13的各损失最小电压,或是通过使各电机11、13的弱磁场电流为最小的控制(即,最大电压矢量控制)等而得到的电源电压等。
再者,在上述的实施方式中,旋转电机控制装置10不限于行驶用电机11和发电用电机13,也可以具备负荷不同的多个旋转电机和对这些旋转电机进行通电控制的多个电力传动单元(PDU),并根据它们为热平衡状态时的热平衡电压来设定目标电压。
再者,在上述的实施方式中,混合动力车辆1不限于串联型,也可以是例如具有串联型和并联型两者的功能的混合动力车辆,或者是功率分流(power split)型混合动力车辆等。
此外,旋转电机控制装置10不限于安装在混合动力车辆1中,也可以安装于例如行驶用电机(MOT)11与驱动轮W联结的电动车辆中。
Claims (4)
1.一种旋转电机控制装置,其特征在于,
由旋转电机和对该旋转电机进行通电控制的通电控制单元构成旋转电机控制单元,
该旋转电机控制装置具备:
负荷不同的多个所述旋转电机控制单元;以及
目标电压设定单元,其根据多个所述旋转电机控制单元处于热平衡状态时的直流侧电压即热平衡电压来设定所述多个所述旋转电机控制单元的针对直流侧电压的目标电压。
2.根据权利要求1所述的旋转电机控制装置,其特征在于,
所述旋转电机控制单元为两个,其中一个旋转电机控制单元的旋转电机为电动机,另一个旋转电机控制单元的旋转电机为发电机,
所述目标电压设定单元根据下式来计算所述热平衡电压,
其中,
Vtar:热平衡电压,
Vmot:电动机电压,
Vgen:发电机电压,
△Tmot:电动机富余温度,
△Tgen:发电机富余温度。
3.根据权利要求1或2所述的旋转电机控制装置,其特征在于,
针对每个所述旋转电机控制单元具备损失最小电压计算单元,该损失最小电压计算单元根据所述旋转电机的转速和转矩计算损失最小电压,该损失最小电压是在运转损失为最小的状态时的所述直流侧电压,所述目标电压设定单元将每个旋转电机控制单元的损失最小电压作为每个旋转电机控制单元的电压,根据电压和温度富余度计算热平衡电压。
4.根据权利要求1所述的旋转电机控制装置,其特征在于,
多个所述旋转电机具有同样的运转特性。
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