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projects:power_quality_analyzer [2019/09/15 15:59] admin [Power supply] |
projects:power_quality_analyzer [2019/09/15 16:01] (current) admin [Schema] |
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| * USB communication interface | * USB communication interface | ||
| ===== AC sensors ===== | ===== AC sensors ===== | ||
| - | ==== AC voltage sensor ==== | + | ==== AC voltage sensors ==== |
| For three-phase balanced system, the sum of instantaneous values of phase voltages (as well as currents) is zero: $$v_{L1} + v_{L2} + v_{L3} = i_{L1} + i_{L2} + i_{L3} = 0$$ In such case also $$u_{N1} = u_{N2} = 0$$ and $$v_1 = v_{L1}\frac{R_{12}}{R_{11} + R_{12}}$$ | For three-phase balanced system, the sum of instantaneous values of phase voltages (as well as currents) is zero: $$v_{L1} + v_{L2} + v_{L3} = i_{L1} + i_{L2} + i_{L3} = 0$$ In such case also $$u_{N1} = u_{N2} = 0$$ and $$v_1 = v_{L1}\frac{R_{12}}{R_{11} + R_{12}}$$ | ||
| + | === SPICE simulation === | ||
| == Voltage divider for measuring phase voltages - SPICE simulation schema == | == Voltage divider for measuring phase voltages - SPICE simulation schema == | ||
| {{ :projects:pq-anal:spice:pqa-acv-divider.png?direct&800 | SPICE simulation of AC voltage divider}} | {{ :projects:pq-anal:spice:pqa-acv-divider.png?direct&800 | SPICE simulation of AC voltage divider}} | ||
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| | Total | | | 72 (94) | | | Total | | | 72 (94) | | ||
| ===== Schema ===== | ===== Schema ===== | ||
| + | == AC sensors == | ||
| {{ :projects:pq-anal:schema:pqa-ac-sensors.png?direct&400 |AC sensors}} | {{ :projects:pq-anal:schema:pqa-ac-sensors.png?direct&400 |AC sensors}} | ||
