发明名称 |
FREQUENCY-CONTROLLED AC DRIVE |
摘要 |
FIELD: power voltage and frequency changers for controlling general-purpose ac squirrel- cage motors. SUBSTANCE: drive has three-phase power rectifier and secondary three-phase bridge converter whose control inputs are connected to outputs of microprocessor controller; drive motor is connected to converter output. Introduced in addition are balanced resistive bridge circuit, integrating capacitor, differential standardizing amplifier, and analog-to-digital converter. Diagonally opposite input pair of terminals of balanced resistive bridge circuit is connected to output leads of three-phase bridge rectifier; integrating circuit is connected to one of sides of diagonally opposite output pair of terminals of balanced resistive bridge circuit; diagonally opposite output pair of terminals of bridge circuit is connected to differential inputs of standardizing amplifier whose output is connected to analog- to-digital converter input. Output of the latter is connected to fifth input of microprocessor controller. EFFECT: improved reliability, reduced size and mass, reduced manufacturing cost of drive. 1 dwg
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申请公布号 |
RU2136103(C1) |
申请公布日期 |
1999.08.27 |
申请号 |
RU19980112296 |
申请日期 |
1998.06.30 |
申请人 |
AO "NAUCHNO-PROIZVODSTVENNOE PREDPRIJATIE "SAPFIR" |
发明人 |
DERJUGIN V.N.;GEJVONDJAN V.V.;KLEJMENOV V.S.;KONDRATSKIJ B.A.;SAMROV N.P.;USOV N.N.;KHACHANJAN O.G. |
分类号 |
H02P27/04;H02M5/45;(IPC1-7):H02P7/62 |
主分类号 |
H02P27/04 |
代理机构 |
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