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STPMC1 数据表(PDF) 47 Page - STMicroelectronics |
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STPMC1 数据表(HTML) 47 Page - STMicroelectronics |
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47 / 77 page  STPMC1 Theory of operation Doc ID 15728 Rev 6 47/77 0.4 PRD: ● period: 12-bit line period measurement (see paragraph 9.6). By default it is calculated from R-phase signal, if it is missing from S-phase then from T-phase. The value of the period can be calculated from the decimal value of period as: Equation 10 ● DC uN: 16-bit DC component of voltage channel of NDSP. It may be DAN-V or DAH according to the value of ENH bit. For example it is DC offset in sigma delta uN if ENH=0, or DC value of magnetic field if ENH is set and a magnetic sensor is connected via STPMSx on DAH input. 9.17.2 Group 1 data records 1.1 DMR: ● uR MOM: 12-bit momentary value of R phase voltage ● iR MOM: 16-bit momentary value of R phase current 1.2 DMS: ● uS MOM: 12-bit momentary value of S phase voltage ● iS MOM: 16-bit momentary value of S phase current 1.3 DMT: ● uT MOM: 12-bit momentary value of T phase voltage ● iT MOM: 16-bit momentary value of T phase current 1.4 DMN: ● sI RMS: 12-bit RMS value of the sum of all the instantaneous currents (iR + iS + iT + iN) divided by four: MCLK 6 f 2 period T ⋅ = Figure 15. Group 1 data records DMN DMR DMS DMT parity iR MOM uR MOM parity iS MOM uS MOM parity iT MOM uT MOM parity iN MOM sI RMS 12 bit 4 bit 16 bit DMN DMR DMS DMT parity iR MOM uR MOM parity iR MOM uR MOM parity iS MOM uS MOM parity iS MOM uS MOM parity iT MOM uT MOM parity iT MOM uT MOM parity iN MOM sI RMS parity iN MOM sI RMS 12 bit 12 bit 4 bit 4 bit 4 bit 16 bit 16 bit DMN DMR DMS DMT parity iR MOM uR MOM parity iS MOM uS MOM parity iT MOM uT MOM parity iN MOM sI RMS 12 bit 4 bit 16 bit DMN DMR DMS DMT parity iR MOM uR MOM parity iR MOM uR MOM parity iS MOM uS MOM parity iS MOM uS MOM parity iT MOM uT MOM parity iT MOM uT MOM parity iN MOM sI RMS parity iN MOM sI RMS 12 bit 12 bit 4 bit 4 bit 4 bit 16 bit 16 bit |
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