CN112005487B - 旋转电机功率转换装置 - Google Patents
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- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
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- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/028—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault
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- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/02—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit
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- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
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- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- H—ELECTRICITY
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- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
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- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
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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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
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- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- 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
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
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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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/28—Arrangements for controlling current
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
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- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
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- H—ELECTRICITY
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- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
本发明获得一种即使在由开关元件构成的功率转换单元的一相发生了断开故障的情况下也能够在可继续运转的转速区域中实现继续运转的旋转电机功率转换装置。包括:根据异常判定单元(7)的判定结果来切换正常时电流控制部(9)和异常时电流控制部(10)的正常时/异常时电流控制部选择部(12);以及对在转速运算单元(6)比规定的转速要小的情况下使用的异常时电流控制部(10)和在比规定的转速要大的情况下使用的功率转换停止部(11)进行切换的异常时电流控制部/功率转换停止部选择部(13)。
Description
技术领域
本发明涉及驱动控制三相交流旋转电机的旋转电机功率转换装置。
背景技术
以往以来,已知有以三相交流旋转电机为驱动力源的电动汽车、混合动力汽车等电动化车辆,在这种电动化车辆中,在行驶时使三相交流旋转电机进行动力运转以产生行驶驱动转矩,在制动时使三相交流旋转电机进行再生运转以产生再生制动转矩。
此处,电动化车辆的驱动***由下述部分来构成,即:由锂离子电池等二次电池构成的直流电源;由电容器和多个半导体开关(开关元件)构成并连接到直流电源的功率转换单元;以及作为负载连接到功率转换单元的三相交流旋转电机。
功率转换单元通过以规定的开关频率接通和断开多个半导体开关,将直流电源的直流电力转换为规定的交流电力,并对作为负载的三相交流旋转电机的转矩、转数进行调节。此外,三相交流旋转电机根据动作状况的不同而作为发电机进行动作,将通过发电而产生的再生电力充电至直流电源。另外,作为适用于电动化车辆的三相交流旋转电机,广泛使用效率较高的永磁体三相同步电动机。
在使用了三相同步电动机的驱动***中,功率转换单元通过将上级侧开关元件和下级侧开关元件串联连接而成的三相(三组)串联电路分别与直流电源并联连接而构成,三相串联电路各自的中点与三相同步电动机的U相、V相和W相各自的绕组连接。
此外,通过依次接通和断开设置在功率转换单元的各相中的开关元件,向三相同步电动机的各相提供相位彼此相差120°的不同的交流电力,从而驱动三相同步电动机。以下,在没有特别说明的情况下,三相交流旋转电机指的是三相同步电动机。
另外,已经公开了下述技术,即:即使在旋转电机功率转换装置的由开关元件构成的功率转换单元的一相发生了断开故障的情况下也使旋转电机功率转换装置继续运转的技术(例如,参照专利文献1、专利文献2)。
现有技术文献
专利文献
专利文献1:日本专利特开2008-67429号公报
专利文献2:日本专利特开2008-211910号公报
发明内容
发明所要解决的技术问题
如上所述,已经公开了下述技术,即:即使在旋转电机功率转换装置的由开关元件构成的功率转换单元的一相发生了断开故障的情况下也使旋转电机功率转换装置继续运转的技术。在专利文献1中介绍了即使在开关元件的一相发生了断开故障的情况下,也能够在不增加开关元件的情况下继续运转的旋转电机功率转换装置,并将该旋转电机功率转换装置应用于电动制动装置。此外,在专利文献2中,提出了一种在功率转换单元中根据发生了断开故障的相来形成相电流指令值的电流控制法,并将其应用于电动助力转向。然而,在将专利文献1和专利文献2中提出的旋转电机功率转换装置应用于电动化车辆,并且功率转换单元的一相发生了断开故障且三相交流旋转电机的转速上升时,电流控制无法进行,从而有可能无法实现继续运转。
此外,在功率转换单元的一相发生了断开故障时,由于三相交流旋转电机的转矩振动,因此有可能会使电动化车辆的乘客怀有不适感。
此外,在功率转换单元的一相发生了断开故障、且三相交流旋转电机的转速上升的情况下,当三相交流旋转电机产生的电压超过功率转换单元的直流电源时,存在下述问题:会产生对于直流电源的过剩的电力再生、再生转矩、异常转矩。
本发明公开了用于解决上述问题的技术,其目的在于获得一种旋转电机功率转换装置,即使在旋转电机功率转换装置的由开关元件构成的功率转换单元的一相发生了断开故障的情况下也能够继续运转。
解决技术问题所采用的技术方案
本申请公开的旋转电机功率转换装置具有功率转换单元,并将来自直流电源的直流电力转换为交流电力,所述功率转换单元设置在三相交流旋转电机与直流电源之间,上级侧的开关元件与下级侧的开关元件串联连接而成的三相串联电路分别与直流电源并联连接,且串联电路各自的上级侧的开关元件和下级侧的开关元件之间连接至三相交流旋转电机的各相的各个绕组,所述旋转电机功率转换装置包括:运算三相交流旋转电机的转速的转速运算单元、判定功率转换单元的一相断开故障的异常的异常判定单元、以及决定针对功率转换单元的相电压指令值的电流控制单元,电流控制单元包括:在功率转换单元正常时使用的正常时电流控制部;在功率转换单元异常时使用的异常时电流控制部;使功率转换单元停止的功率转换停止部;根据异常判定单元的判定结果来切换正常时电流控制部和异常时电流控制部的正常时/异常时电流控制部选择部;以及对在转速运算单元的运算结果比预先决定的规定转速要小时使用的异常时电流控制部和在转速运算单元的运算结果比预先决定的规定转速要大时使用的功率转换停止部进行切换的异常时电流控制部/功率转换停止部选择部。
发明效果
根据本申请所公开的旋转电机功率转换装置,在功率转换单元中发生了一相断开故障、从而判定为异常的情况下,使用异常时电流控制部,但仅在能够由异常时电流控制部进行电流控制的转速的区域中,使用异常时电流控制部,由此能够在可继续运转的转速区域中实现继续运转。
附图说明
图1是表示实施方式1所涉及的旋转电机功率转换装置和三相交流旋转电机的概要图。
图2是表示实施方式1所涉及的旋转电机功率转换装置的电流控制单元的动作流程图。
图3是表示实施方式2所涉及的旋转功率转换装置和三相交流旋转电机的概要图。
图4是表示实施方式2所涉及的旋转电机功率转换装置的电流控制单元的动作流程图。
图5是表示实施方式3所涉及的旋转电机功率转换装置和三相交流旋转电机的概要图。
图6是表示实施方式4所涉及的旋转电机功率转换装置的应用例的概要图。
图7是表示实施方式中旋转电机功率转换装置的硬件结构的一个示例的图。
具体实施方式
下面,使用附图来说明旋转电机功率转换装置的优选实施方式。另外,关于各图中相同或相当的部分,标注相同标号来进行说明。
实施方式1.
图1是实施方式1所涉及的旋转电机功率转换装置1和三相交流旋转电机2的概要图。旋转电机功率转换装置1连接在三相交流旋转电机2和直流电源3之间,并将来自直流电源3的直流电力转换为交流电力,并向三相交流旋转电机2供电,该旋转电机功率转换装置1包括:功率转换单元5,将来自直流电源3的直流电力转换为向三相交流旋转电机2提供的交流电力;电流检测单元4,检测流过三相交流旋转电机2的相电流;转速运算单元6,根据来自三相交流旋转电机2的旋转电机角度来运算转速;电流控制单元8,向功率转换单元5输出相电压指令或功率转换停止指令;以及异常判定单元7,检测、确定功率转换单元5的一相断开故障并判定异常。另外,功率转换单元5中,上级侧的开关元件和下级侧的开关元件串联连接而成的三相串联电路分别与直流电源并联连接,各个串联电路中的上级侧的开关元件和下级侧的开关元件之间连接至三相交流旋转电机的各个绕组。
此外,电流控制单元8包括:在正常时使用的正常时电流控制部9;在异常时使用的异常时电流控制部10;使功率转换单元5停止的功率转换停止部11;根据异常判定单元7切换正常时电流控制部9和异常时电流控制部10的正常时/异常时电流控制部选择部12;对在转速运算单元6的运算结果比预先决定的规定转速要小时使用的异常时电流控制部10和在转速运算单元6的运算结果比预先决定的规定转速要大时使用的功率转换停止部11进行切换的异常时电流控制部/功率转换停止部选择部13。
图2是旋转电机功率转换装置1的电流控制单元8的动作流程图。
在功率转换单元5中发生了一相断开故障(步骤S1)、且由转速运算单元6运算得到的转速比预先决定的规定转速要大的情况下(步骤S2),使用功率转换停止部11来停止功率转换(步骤S3)。此外,在步骤S2中判断为转速比预先决定的规定转速要小的情况下,使用异常时电流控制部10来实施异常时电流控制(步骤S4)。此外,在步骤S1中,在判断为功率转换单元5中没有发生一相断开故障的情况下,使用正常时电流控制部9来实施正常时电流控制(步骤S5)。
根据图1的结构和图2的动作流程图,在功率转换单元5中发生了一相断开故障、并由异常判定单元7判定为异常的情况下,使用异常时电流控制部10,但仅在能够由异常时电流控制部10进行电流控制的转速的区域中,使用异常时电流控制部10,由此能够在可继续运转的转速区域中实现继续运转。
此外,在功率转换单元5中发生一相断开故障、且转速比规定转速要小的情况下,使用异常时电流控制部10,但交替地使用异常时电流控制部10和功率转换停止部11。通过交替地使用异常时电流控制部10和功率转换停止部11,虽然在使用异常时电流控制部10的情况下,发生转矩振动,但能够减少转矩振动发生的时间。
此外,在功率转换单元5中发生一相断开故障、且转速比规定转速要小的情况下,使用异常时电流控制部10,但根据状况来改变使用异常时电流控制部10和功率转换停止部11的比例。该状况当然是三相交流旋转电机2的转矩、转速、温度。通过根据状况来改变使用异常时电流控制部10和功率转换停止部11的比例,从而能够根据三相交流旋转电机2的转矩、转速、温度,来改变转矩振动发生时间的减少程度。
实施方式2.
图3是实施方式2的旋转电机功率转换装置1a和三相交流旋转电机2的概要图,基本结构与实施方式1同样地构成,但功率转换单元5具备升压部14,该升压部14设置在直流电源3与功率转换单元5之间。
图4是具有升压功能的实施方式2的旋转电机功率转换装置1a中的电流控制单元8的动作流程图。
在判断为功率转换单元5中发生了一相断开故障的情况下(步骤S1),由升压部14来实施功率转换单元5的升压动作(步骤S6),接着在步骤S2中,在由转速运算单元6运算得到的转速比预先决定的规定转速要大的情况下(步骤S2),使用功率转换停止部11来停止功率转换(步骤S3)。此外,在步骤S2中判断为转速比预先决定的规定转速要小的情况下,使用异常时电流控制部10来实施异常时电流控制(步骤S4)。此外,在步骤S1中,在判断为功率转换单元5中没有发生一相断开故障的情况下,使用正常时电流控制部9来实施正常时电流控制(步骤S5)。
根据图3的结构和图4的动作流程图,在功率转换单元5中发生一相断开故障、且由异常判定单元7判定为异常的情况下,通过升压至比正常时要高的电压,从而三相交流旋转电机2的转速上升,能够防止因三相交流旋转电机2产生的电压超过直流电源3的直流电压而产生的再生转矩导致的制动力,能够防止异常转矩的产生。
实施方式3.
图5是实施方式3中的旋转电机功率转换装置1b、三相交流旋转电机102以及三相交流旋转电机202的概要图。实施方式3以多个三相交流旋转电机为对象,功率转换单元、电流控制单元的基本结构与实施方式2同样地构成,但旋转电机功率转换装置1b连接至多个三相交流旋转电机102、202。实施方式3中的旋转电机功率转换装置1b的动作与实施方式2基本相同。
由开关元件构成的功率转换单元5a由第1功率转换部105和第2功率转换部205构成,能够单独地驱动多个三相交流旋转电机102、202。采用第1电流控制单元108向第1功率转换部105输出相电压指令、第2电流控制单元208向第2功率转换部205输出相电压指令的结构,但采用第1功率转换停止部111和第2功率转换停止部211分别向第1功率转换部105和第2功率转换部205双方进行输出的结构。
根据图5的结构,在第1功率转换停止部111或第2功率转换停止部211进行了动作的情况下,能够停止向多个三相交流旋转电机102、202进行功率转换,从而能够防止因直流电源3、升压部14、多个三相交流旋转电机102、202、功率转换单元5a间的功率不平衡而导致的过电压、过电流。
实施方式4.
图6是表示将图1所示的实施方式1的旋转电机功率转换装置1应用于电动化车辆的示例的概念图。另外,作为其他的实施方式,也能够将图3所示的实施方式2的旋转电机功率转换装置1a或图5所示的实施方式3的旋转电机功率转换装置1b用于电动化车辆。在实施方式4中,旋转电机功率转换装置也进行与其他的实施方式相同的动作。
如图6所示,旋转电机功率转换装置1搭载于作为电动化车辆的车辆2000,使用直流电源3(例如,高电压电池)的电力来驱动三相交流旋转电机2。车辆2000具有通过轴与三相交流旋转电机2相连接的主传动齿轮2005、通过轴与该主传动齿轮2005相连接且设置于车辆前部的前轮左侧轮胎2001和前轮右侧轮胎2002。此外,在车辆2000的后部还配置有通过轴来连接的后轮左侧轮胎2003、后轮右侧轮胎2004。
在将实施方式1的旋转电机功率转换装置应用于电动化车辆的实施方式4中,即使在电动化车辆的功率转换单元5中发生一相断开故障、且由异常判定单元7判定为异常的情况下,也能够在可由异常时电流控制部10进行电流控制的转速区域中进行基于动力转矩的行驶辅助、继续运转。
此外,在电动化车辆的功率转换单元5中发生一相断开故障、且转速比规定转速要小的情况下,使用异常时电流控制部10,但交替地使用异常时电流控制部10和功率转换停止部11。通过交替地使用异常时电流控制部10和功率转换停止部11,虽然在使用异常时电流控制部10的情况下,发生转矩振动,但通过减少转矩振动发生的时间,从而能够减轻给电动化车辆的乘客带来的不适感。
此外,在将图3所示的实施方式2的旋转电机功率转换装置1a应用于电动化车辆的实施方式中,在电动化车辆的功率转换单元5中发生一相断开故障、且由异常判定单元7判定为异常的情况下,通过升压至比正常时要高的电压,从而电动化车辆的三相交流旋转电机2的转速上升,能够防止因三相交流旋转电机2产生的电压超过直流电源3的直流电压而产生的再生转矩导致的制动力,能够防止异常转矩的产生。
此外,在将图5所示的实施方式3的旋转电机功率转换装置1b应用于电动化车辆的实施方式的情况下,由于电动化车辆的功率转换单元5a能够驱动多个三相交流旋转电机102、202,因此,能够防止因电动化车辆内的直流电源3、升压部14、多个三相交流旋转电机102、202、功率转换单元5a间的功率不平衡而导致的过电压、过电流。
本申请虽然记载了各种示例性的实施方式以及实施例,但是1个或多个实施方式所记载的各种特征、方式及功能并不仅限于适用特定的实施方式,也可以单独适用于实施方式,或者进行各种组合来适用于实施方式。
因此,可以认为未例示出的无数变形例也包含在本申请说明书所公开的技术范围内。例如,设为也包含对至少1个结构要素进行变形、追加或者省略的情况、以及提取至少1个结构要素并与其它实施方式的结构要素进行组合的情况。
另外,旋转电机功率转换装置1如图7所示的硬件结构的一个示例那样,由处理器1001和存储装置1002构成。存储装置虽然没有进行图示,但具备随机存取存储器等易失性存储装置、以及闪存等非易失性的辅助存储装置。此外,可以具备硬盘的辅助存储装置来代替闪存。处理器1001执行从存储装置1002输入的程序。该情况下,程序从辅助存储装置经由易失性存储装置输入到处理器1001。并且,处理器1001可以将运算结果等数据输出至存储装置1002的易失性存储装置,也可以经由易失性存储装置将数据保存到辅助存储装置。旋转电机功率转换装置1a、1b也同样。
标号说明
1旋转电机功率转换装置、4电流检测单元、5功率转换单元、6转速运算单元、7异常判定单元、8电流控制单元、9正常时电流控制部、10异常时电流控制部、11功率转换停止部、12正常时/异常时电流控制部选择部、13异常时电流控制部/功率转换停止部选择部。
Claims (6)
1.一种旋转电机功率转换装置,具有功率转换单元,并将来自直流电源的直流电力转换为交流电力,所述功率转换单元设置在三相交流旋转电机与所述直流电源之间,上级侧的开关元件与下级侧的开关元件串联连接而成的三相串联电路分别与所述直流电源并联连接,且所述串联电路各自的所述上级侧的开关元件和所述下级侧的开关元件之间连接至所述三相交流旋转电机的各相的各个绕组,所述旋转电机功率转换装置的特征在于,
包括:运算所述三相交流旋转电机的转速的转速运算单元、判定所述功率转换单元的一相断开故障的异常的异常判定单元、以及决定针对所述功率转换单元的相电压指令值的电流控制单元,
所述电流控制单元包括:在所述功率转换单元正常时使用的正常时电流控制部;在所述功率转换单元异常时使用的异常时电流控制部;使所述功率转换单元停止的功率转换停止部;根据所述异常判定单元的判定结果来切换所述正常时电流控制部和所述异常时电流控制部的正常时/异常时电流控制部选择部;以及对在所述转速运算单元的运算结果比预先决定的规定转速要小时使用的所述异常时电流控制部和在所述转速运算单元的运算结果比预先决定的规定转速要大时使用的所述功率转换停止部进行切换的异常时电流控制部/功率转换停止部选择部,
在所述异常判定单元中判断为所述功率转换单元未发生一相断开故障时,使用由所述正常时/异常时电流控制部选择部切换的所述正常时电流控制部来实施正常时电流控制,
在所述异常判定单元中判断为所述功率转换单元发生了一相断开故障时,选择由所述正常时/异常时电流控制部选择部切换的所述异常时电流控制部,并且在所述转速运算单元的运算结果比预先决定的规定转速要小的情况下,使用由所述异常时电流控制部/功率转换停止部选择部切换的所述异常时电流控制部来实施异常时电流控制,
在所述异常判定单元中判断为所述功率转换单元发生了一相断开故障时,且在所述转速运算单元的运算结果比预先决定的规定转速要大的情况下,使用由所述异常时电流控制部/功率转换停止部选择部切换的所述功率转换停止部来停止功率转换。
2.如权利要求1所述的旋转电机功率转换装置,其特征在于,
所述异常时电流控制部/功率转换停止部选择部在所述转速比所述规定转速要小的情况下,使用所述异常时电流控制部,但交替地选择所述异常时电流控制部和所述功率转换停止部。
3.如权利要求2所述的旋转电机功率转换装置,其特征在于,
所述异常时电流控制部/功率转换停止部选择部改变选择所述异常时电流控制部和所述功率转换停止部的比例。
4.如权利要求1至3的任一项所述的旋转电机功率转换装置,其特征在于,
包括升压部,该升压部在所述功率转换单元的一相断开故障的异常时将所述功率转换单元的输出升压至比正常时要高的电压。
5.如权利要求1至3的任一项所述的旋转电机功率转换装置,其特征在于,
针对多个三相交流旋转电机设置所述功率转换单元和所述电流控制单元,所述功率转换单元具有能够单独地驱动多个三相交流旋转电机的多个功率转换部,所述功率转换停止部向所述多个功率转换部输出功率转换停止指令。
6.如权利要求1至3的任一项所述的旋转电机功率转换装置,其特征在于,
设置于电动化车辆,向所述电动化车辆的驱动用的三相交流旋转电机供电。
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DE112018007524T5 (de) | 2021-01-14 |
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