Muenzaniso weMibvunzo yeKukurukurirana paMota dzeMagetsi
Mota yemagetsi muchina unoshandura simba remagetsi kuita simba remakanika. Chinhu chakakosha mumashandisirwo akasiyana-siyana emaindasitiri, ebhizinesi, uye epamba. Kunzwisisa misimboti nekushanda kwemamota emagetsi kwakakosha, kunyanya kune vadzidzi veinjiniya nenyanzvi mumunda wemagetsi. Muchinyorwa chino, tichakurukura mienzaniso yakati wandei yezvinetso nehurukuro dzine chekuita nemamota emagetsi kuti tibatsire kunzwisisa kwedu zvakadzama.
Nheyo dzekutanga dzeMota dzeMagetsi
Tisati tanyatsoongorora mibvunzo iyi, zvinobatsira kuti tiongorore misimboti yekutanga yemamota emagetsi. Mamota emagetsi anoshanda pamisimboti yemagetsi, apo magetsi emagetsi anopfuura nepa coil anoburitsa simba remagineti rinobatana nesimba remagineti rechinhu chekunze kuti riburitse kufamba. Kazhinji, mamota emagetsi akakamurwa kuita mhando mbiri huru: mamota emagetsi akananga (DC) uye mamota emagetsi achinjana (AC).
Zvikamu Zvikuru zveMota yeMagetsi
1. Stator: Chikamu chisingachinji chemota chinowanzo kuve nemakoiri ewaya kana magineti anogara aripo.
2. Rotor: Chikamu chinotenderera chemota chinowanzo kuve nemakoiri ewaya kana magineti.
3. Coil: Waya inotenderedzwa yakatenderedza rotor kana stator kuti igadzire simba remagineti.
4. Simba Rinobva: Rinopa simba remagetsi rinodiwa kuti mota ifambiswe.
Mibvunzo yemuenzaniso nekukurukurirana
Mubvunzo 1: Kuverenga kumhanya kwemota yeDC
Mubvunzo: Mota yeDC ine maturns mazana mashanu pa coil imwe neimwe inoshanda pa24V ne5A. Kana mota isingachinji \( K_m \) iri 0.02 Nm/A, verenga kumhanya kwekutenderera kwerotor kana torque inobuda iri 1 Nm.
Kukurukurirana:
Zvinozivikanwa:
– Nhamba yekutenderera (N) = 500
– Voltage (V) = 24V
– Nguva Yazvino (I) = 5A
– Mota isingachinji \( K_m \) = 0.02 Nm/A
– Torque (T) = 1 Nm
Kubva pa equation yekutanga yemota yeDC, tinoziva:
\[ T = K_m \cdot I \]
\[ 1 Nm = 0.02 Nm/A \cdot 5 A \]
\[ 1 Nm = 0.1 Nm \]
Izvi zvinoreva kuti torque constant inodiwa kuti ibudise 1 Nm pa current ye5 A ndiyo chaiyo.
Tevere, kuverenga kumhanya kwekutenderera (\( \omega \)):
\[ E = K_m \cdot \omega \]
\[ V = E \]
\[ 24V = 0.02 Nm/A \cdot \omega \]
Kubva pano, tinogona kuverenga velocity (\( \omega \)):
\[ \omega = \frac{V}{K_m} \]
\[ \omega = \frac{24V}{0.02 Nm/A} \]
\[ \omega = 1200 rad/s \]
Mubvunzo 2: Kushanda zvakanaka kwemota yeAC Induction
Mubvunzo: Mota ye3-phase induction ine simba rekupinda re30 kW uye simba rekubudisa re27 kW. Verenga mashandiro emota.
Kukurukurirana:
Zvinozivikanwa:
– Simba rekuisa (P_in) = 30 kW
– Simba rekuburitsa (P_out) = 27 kW
Kushanda zvakanaka kwemota (\( \eta \)) kunogona kuverengerwa uchishandisa fomura iyi:
\[ \eta = \left( \frac{P_{out}}{P_{in}} \right) \times 100\% \]
\[ \eta = \kuruboshwe( \frac{27 kW}{30 kW} \kurudyi) \kawa 100\% \]
\[ \eta = 0.9 \kawa 100\% \]
\[ \eta = 90\% \]
Saka, kushanda zvakanaka kwemota ye induction ndeye 90%.
Mubvunzo 3: Mota Inoenderana
Mubvunzo: Mota inochinjika ine mapango mana uye inopihwa frequency ye60 Hz. Verenga kumhanya kunochinjika kwemota.
Kukurukurirana:
Zvinozivikanwa:
– Nhamba yematanda (P) = 4
– Kakawanda (f) = 60 Hz
Kumhanya kwe synchronous (n_s) kwemota ye synchronous kunogona kuverengerwa uchishandisa fomura:
\[ n_s = \frac{120 \cdot f}{P} \]
\[ n_s = \frac{120 \cdot 60}{4} \]
\[ n_s = \frac{7200}{4} \]
\[ n_s = 1800 \, RPM \]
Saka, kumhanya kwe synchronous kwe synchronous motor ndeye 1800 RPM.
Mubvunzo 4: Torque yemotokari yeDC yakatevedzana
Mubvunzo: Mota yeDC series ine coil resistance ye0.5 ohms uye ine voltage ye120V. Kana current flowing iri 10A, verenga torque kana torque constant iri 0.1 Nm/A².
Kukurukurirana:
Zvinozivikanwa:
– Kudzivirira kwekoiri (R) = 0.5 ohm
– Voltage yemagetsi (V) = 120V
– Nguva Yazvino (I) = 10A
– Torque isingachinji \( K_t \) = 0.1 Nm/A²
Kutanga, verenga kudonha kwemagetsi pa coil:
\[ V_R = I \cdot R \]
\[ V_R = 10A \cdot 0.5 \Omega \]
\[ V_R = 5V \]
Voltage inoshanda (V_eff) inoshanda pamota:
\[ V_eff = V – V_R \]
\[ V_eff = 120V – 5V \]
\[ V_eff = 115V \]
Torque (T) inogona kuverengerwa uchishandisa fomura:
\[ T = K_t \cdot I^2 \]
\[ T = 0.1 Nm/A² \cdot (10A)^2 \]
\[ T = 0.1 Nm/A² \cdot 100 A² \]
\[ T = 10 Nm \]
Saka, torque inogadzirwa nemota yeDC series i10 Nm.
Mubvunzo 5: Induction Motor Starter
Mubvunzo: Nyanzvi inoisa starter ye star-delta pamota ye induction ine simba re 50 kW. Verengai simba rekutanga rekutanga kana voltage yekushanda iri 400 V uye mota ine simba re 92%.
Kukurukurirana:
Zvinozivikanwa:
– Simba remota (P) = 50 kW
– Voltage (V) = 400V
– Kushanda zvakanaka (\( \eta \)) = 92%
Kutanga, tinoverenga simba rekupinda (P_in):
\[ P_{in} = \frac{P}{\eta} \]
\[ P_{in} = \frac{50 kW}{0.92} \]
\[ P_{in} = 54.35 kW \]
Sezvo mota ichishandisa sisitimu yenyeredzi-delta, simba rekutanga munyeredzi richave rakaderera pane simba panguva yekushanda kwedelta. Zvisinei, kuti tiverenge simba remagetsi, tinogona kushandisa P_in naV:
\[ I_{nom} = \frac{P_{in}}{\sqrt{3} \cdot V} \]
\[ I_{nom} = \frac{54.35 kW}{\sqrt{3} \cdot 400V} \]
\[ I_{nom} = \frac{54350}{692.82} \]
\[ I_{nom} \inenge 78.44 A \]
Zvekutanga magetsi kana uchishandisa nyeredzi:
\[ I_{start\_star} = \frac{I_{nom}}{\sqrt{3}} \]
\[ I_{start\_star} \approx \frac{78.44A}{\sqrt{3}} \]
\[ I_{start\_star} \inenge 45.28 A \]
Saka, simba rekutanga mudenderedzwa renyeredzi rinenge 45.28 A.
Mhedziso
Kunzwisisa maverengero ekutanga emhando dzakasiyana dzemota dzemagetsi kwakakosha kune avo vanoshanda muinjiniya yemagetsi neyemakanika. Mienzaniso yematambudziko ari pamusoro apa inoratidza kuti maparamita akasiyana-siyana akadai sevoltage, current, torque, uye kushanda zvakanaka zvinoita sei pakusarudza mashandiro emota dzemagetsi. Nekudzidzira nguva dzose, kugona kugadzirisa matambudziko akadai kuchava kwakakosha mukushandiswa kwemagetsi uye pabasa.
