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ADE8052Z-EMUL1 データシート(PDF) 61 Page - Analog Devices |
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ADE8052Z-EMUL1 データシート(HTML) 61 Page - Analog Devices |
61 / 144 page ADE7566/ADE7569/ADE7166/ADE7169 Rev. A | Page 61 of 144 Figure 66 shows this energy accumulation for full-scale signals (sinusoidal) on the analog inputs. The three displayed curves illustrate the minimum period of time it takes the energy register to roll over when the active power gain register contents are 0x7FF, 0x000, and 0x800. The watt gain register is used to carry out power calibration in the ADE7566/ADE7569/ADE7166/ ADE7169. As shown, the fastest integration time occurs when the watt gain register is set to maximum full scale, that is, 0x7FF. When WDIV is set to a value other than 0, the integration time varies, as shown in Equation 17. Time = TimeWDIV = 0 × WDIV (17) Active Energy Accumulation Modes Watt Signed Accumulation Mode The ADE7566/ADE7569/ADE7166/ADE7169 active energy default accumulation mode is a watt-signed accumulation based on the active power information. 0x00,0000 0x7F,FFFF 0x3F,FFFF 0x40,0000 0x80,0000 WATTHR[23:0] 6.82 3.41 10.2 13.7 TIME (Minutes) WGAIN = 0x7FF WGAIN = 0x000 WGAIN = 0x800 Watt Positive-Only Accumulation Mode The ADE7566/ADE7569/ADE7166/ADE7169 are placed in watt positive-only accumulation mode by setting the POAM bit in the ACCMODE register (0x0F). In this mode, the energy accumulation is only done for positive power, ignoring any occurrence of negative power above or below the no-load threshold (see Figure 67). The CF pulse also reflects this accumulation method when in this mode. The default setting for this mode is off. Detection of the transitions in the direction of power flow and detection of no-load threshold are active in this mode. POS POS INTERRUPT STATUS REGISTERS NEG APSIGN FLAG NO-LOAD THRESHOLD ACTIVE POWER NO-LOAD THRESHOLD ACTIVE ENERGY Figure 66. Energy Register Rollover Time for Full-Scale Power (Minimum and Maximum Power Gain) Note that the energy register contents roll over to full-scale negative (0x800000) and continue to increase in value when the power or energy flow is positive (see Figure 66). Conversely, if the power is negative, the energy register underflows to full- scale positive (0x7FFFFF) and continues to decrease in value. By using the interrupt enable register, the ADE7566/ADE7569/ ADE7166/ADE7169can be configured to issue an ADE interrupt to the 8052 core when the active energy register is half full (positive or negative) or when an overflow or underflow occurs. Integration Time Under Steady Load: Active Energy As mentioned in the Active Energy Calculation section, the discrete time sample period (T) for the accumulation register is 1.22 μs (5/CLKIN). With full-scale sinusoidal signals on the analog inputs and the WGAIN register set to 0x000, the average word value from each LPF2 is 0xCCCCD (see Figure 67. Energy Accumulation in Positive-Only Accumulation Mode Watt Absolute Accumulation Mode The ADE7566/ADE7569/ADE7166/ADE7169 are placed in watt-absolute accumulation mode by setting the ABSAM bit in the ACCMODE register (0x0F). In this mode, the energy accumulation is done using the absolute active power, ignoring any occurrence of power below the no-load threshold (see Figure 63). The maximum positive value that can be stored in the internal 49- bit register is 248 (or 0xFFFF,FFFF,FFFF) before it overflows. The integration time under these conditions when WDIV = 0 is calculated in the following equation: Figure 68). The CF pulse also reflects this accumulation method when in this mode. The default setting for this mode is off. Detection of the transitions in the direction of power flow, and detection of no-load threshold are active in this mode. Time = min 82 . 6 sec 6 . 409 s 22 . 1 xCCCCD 0 FFFF FFFF, xFFFF, 0 = = μ × (16) |
同様の部品番号 - ADE8052Z-EMUL1 |
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同様の説明 - ADE8052Z-EMUL1 |
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