MPAI-NA506

MPAI-NA506

MPAI-NA506

MPAI-NA506

MPAI-NA506

Tp为电流上升时间，Tn为电流下降时间，Ud为逆变母线电压正极对地电压，e为网侧电压，L为网侧电抗值。

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在滞环带宽h固定的时候，开关频率会随着电网相电压U0的变化而变化。U0过零点附近时，开关频率变高；在幅值附近时，开关频率变低。例如Ud=530V，电网侧线电压U0=620V，电感L=250uH，滞环h=50A，那开关频率会从10600Hz到930Hz变动。而实际上在电路设计中为了避免带宽为零时对IGBT器件造成损坏，对滞环带宽进行了限值， 小值在A，所以实际运行中开关频率在变动。

带宽频率不固定，对电力器件的工作频率提出很高的要求，根据公式（7）可以推出，如果要固定频率，则滞环宽度h要变化，即：

根据公式（8），例如直流母线电压Ud=530V，L=250uH，确定开关频率为4kHz，网侧电压幅值为506V（对应620V线电压），则对A相电压来说，相应的带宽

此种方式可以通过软件程序实现。

2.3 改进技术方案的电路设计

数字量信号电流给定值、带宽值经DA芯片转换为模拟量信号，与采样电流信号经过比较运算，生成PWM调制信号；其波形变化图如图3所示。

Applied Materials Digital I/O Board 0100-20003

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MOTOROLA MVME MODULE 01-W3347F-43A 147-022 

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DESCHUTES CORPORATION OCTUPOLE DRIVER 670-0100-01 

ASML/SVG DUAL CHANNEL AQUISITION VME BOARD 865-8010-005

ASML/SVG DUAL CHANNEL AQUISITION VME BOARD 865-8023-004

ACB VME BOARD D23123300

ASML/SVG PC Board P/N:865-8022-00?4

Motorola 01-W3632F-12A cPCI BOARD 01-W3632F 

Motorola 01-W3658F-06B cPCI BOARD 01-W3658F W/0181F-02A

RADVISION asNT-10 MODULE W/ WIN SERVER 2000

MOTOROLA MVME2302 01-W3345F MVME 2302 NEW


Motorola CPN5365 01-W3658F-06J cPCI BOARD 01-W3632F

Siemens S42024-C3016-A1 MAINFRAME BOARD

MIZAR 7710 VIDEO Board 7710-00011-01 REV-W

MOTOROLAPACT PCI CPV5370 BOARD 01-W3545F NTAR02NV

MOTOROLA CPTM-04 01-W3764F 01B NORTEL NTAR02NX

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SBE -33 VME CONTROLLER MODULE

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MOTOROLA CPN5360 PROCESSOR CARD + IBM 6.5GB HARD DRIVE

TELEGATE QTE AS1615 EL1 MODULE

MOTOROLA PROCESSOR CARD + IBM 10.06 GB HARD DRIVE

TELEGATE QTE AS1890 MAC MODULE

MOTOROLA BOARD 01-W3739F 

JASPER DPCI204-1022-4-M1131 DC DPCI 204-4-M1131

MOTOROLA MVME 147-022 VME BOARD 01-W3964B MVME147-022

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RADISYS EPC-3305 CPU BOARD EPC 3305 W/ P-III 500Mhz 6GB

JASPER DPCI204-1022-4-NN DC DPCI 204-1022-4-NN

ARTESYN BajaSpan 10000212-00 8 PORT E1 BOARD

ARTESYN BajaSpan 10001532-01 E1 cPCI PROCESSING BOARD

ARTESYN BajaSpan 10000080-06 E1 cPCI PROCESSING BOARD

KONTRON PEP CP6000 CPCI/PICMG PENTIUM M EMBEDDED BLADE

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MOTOROLA MVME 334B VME BOARD 01-W3875B MVME334B

MOTOROLA MVME162-522A VME BOARD 01-W3960B MVME 162-522A

MOTOROLA MVME162-432 01-W3960B MVME 162-432

MOTOROLA MCPN750A cPCI VME BOARD MCP750 01-W3611F

MOTOROLA MVME BOARD 01-W3580F W / 01-W3186F

KONTRON CTM80-2 REAR I/O T6701AC FOR DT64/CP6010/CP6?000

KONTRON PEP CP602 CPU BOARD FORpactPCI SYSTEM CP600

MOTOROLA MVME 334A VME BOARD 01-W3726B MVME334A

KONTRON PEP CP610 CPU BOARD FORpactPCI SYSTEM CP600

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MOTOROLA MVME162-032 VME BOARD 01-W3884B MVME 162-032

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LIS 073320-183 CLOCK PROCESSOR 133 BLADE


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LEICA 301-389.040 VME BOARD

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DY 4 Systems DMV-739 900816-005 DY-4 DMV739

DY 4 Systems DMV-783 901163-603 DY-4 DMV783

SIEMENS ULAF+ OMI SNMP S3119-Q300-A310?-1












MOTOROLA MVME 162-013A BOARD MVME162-013A 01-W3884B

AGILENT E7300B QA ROBOT (700MHz)CPU Pentium-3256MB RAM

IML ARTEMUX IML-S007 S007-155-SMF NMS PN:50174