Differences
This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision | ||
projects:power_quality_analyzer [2019/09/15 15:40] admin [AC voltage sensor] |
projects:power_quality_analyzer [2019/09/15 16:01] (current) admin [Schema] |
||
---|---|---|---|
Line 9: | Line 9: | ||
* USB communication interface | * USB communication interface | ||
===== AC sensors ===== | ===== AC sensors ===== | ||
- | ==== AC voltage sensor ==== | + | ==== AC voltage sensors ==== |
- | In three-phase balanced system, the sum of instantaneous values of phase voltages (as well as currents) is zero: $$v_{L1} + v_{L2} + v_{L3} = i_{L1} + i_{L2} + i_{L3} = 0$$ | + | 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}} | ||
Line 24: | Line 25: | ||
^ Component ^ Max. consumption [mA] ^ # ^ Total consumption [mA] ^ | ^ Component ^ Max. consumption [mA] ^ # ^ Total consumption [mA] ^ | ||
| ACS712 | 13 | 4 | 52 | | | ACS712 | 13 | 4 | 52 | | ||
- | | TL084 | 12 | 2 | 24 | | + | | TL064 (TL084) | 1 (12) | 2 | 2 (24) | |
| 78xx/79xx | 6 | 3 | 18 | | | 78xx/79xx | 6 | 3 | 18 | | ||
- | | Total | | | 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}} |