SDAA201 January   2026 MSPM0C1104

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 System Introduction
  5. 2 Hardware Implementation
    1. 2.1 Power Supply
    2. 2.2 Voltage sensing
    3. 2.3 Current Inputs
  6. 3 Software Introduction
    1. 3.1 Peripherals Setup
    2. 3.2 Metrology Computation Engine
    3. 3.3 Foreground Process
    4. 3.4 Background Process
    5. 3.5 PC GUI Introduction
  7. 4 Demo Board Quick Start and Calibration
    1. 4.1 Evaluation Board Introduction
    2. 4.2 Scaling Factor Calibration
  8. 5 Test Results
  9. 6References

5 Test Results

For this solution is tested based on the hardware below

  • AC source: Chroma programmable AC source 61503(accuracy 0.2%)
  • Resistor load: LINGO Dry type load bank
  • Temperature test chamber: Votsch VT4002
  • The accuracy of resistors on the EVM board based on 1%
Table 5-1 Different current load accuracy test- current and voltage
Current reference(A) Current measure(A) Current error(A) Current error % Voltage reference(V) Voltage measure(V) Voltage error(V) Voltage error %
0.34 0.344 0.004 1.18(max) 220.1 220.42 0.32 0.15
0.69 0.698 0.008 1.16 220.1 220.29 0.19 0.09
1.04 1.0412 0.0012 0.12 220.2 220.26 0.06 0.03
1.39 1.387 -0.003 -0.22 220.1 220.04 -0.06 -0.03
1.72 1.726 0.006 0.35 220.1 219.91 -0.19 -0.09
2.07 2.073 0.003 0.14 220 219.83 -0.17 -0.08
2.42 2.422 0.002 0.08 220 219.67 -0.33 -0.15
2.76 2.759 -0.001 -0.04 220 219.56 -0.44 -0.2
3.1 3.106 0.006 0.19 220 219.53 -0.47 -0.21
3.44 3.444 0.004 0.12 220 219.39 -0.61 -0.28(max)
Table 5-2 Different current load accuracy test – Active power
Power reference(W) Power measure(W) Power error (W) Power error %
76.2 75.64 -0.56 -0.73(max)
153 153.46 0.46 0.3
229 228.96 -0.04 -0.02
305.2 304.57 -0.63 -0.21
379.5 379.06 -0.44 -0.12
455.9 455.07 -0.83 -0.18
532.7 531.07 -1.63 -0.31
607 604.75 -2.25 -0.37
683.2 680.68 -2.52 -0.37
757.5 754.33 -3.17 -0.42
Table 5-3 Typical Accuracy versus Temperature
Temp(℃) Voltage(V) Current(A) Active Power(W)
Vmeasure Vref Error(%) Imeasure Iref Error(%) Pmeasure Pref Error(%)
0 219.21 220 -0.36 2.066 2.07 -0.19 452.17 456 -0.84
10 219.55 220 -0.2 2.071 2.07 0.05 453.97 456.6 -0.58
20 219.79 220 -0.1 2.075 2.07 0.24 455.3 456.5 -0.26
25 219.89 220 -0.05 2.076 2.07 0.29 455.79 456.5 -0.16
35 220.18 220 0.08 2.08 2.07 0.48 457.34 456.5 0.18
45 220.45 220 0.2 2.084 2.07 0.68 458.69 456.5 0.48
55 220.72 220 0.33 2.087 2.07 0.82 460.04 456.6 0.75
65 220.96 220 0.44 2.091 2.07 1.01 461.41 456.6 1.05
75 221.21 220 0.55 2.095 2.07 1.21 462.7 456.6 1.34
85 221.44 220 0.65(max) 2.098 2.07 1.35(max) 463.91 456.6 1.6(max)