Induction motors are used as generators when

Motar induksi yana ake amfani da ita don inganta masu aiki, wanda ake kira a matsayin motar inganta. Motar ya zama a matsayin inganta ta hanyar alamomin da dama, musamman don abubuwa masu aiki mai sauƙi. Haka ne alamomin da dabamai da za su iya amfani da motar induksi a matsayin inganta:

1. Aiki da Sauran Kwakwalwa Da Sauran Kwakwalwa na Musamman

Alamomin:

Sauran Kwakwalwa Yana Karkashinsa Sauran Kwakwalwa na Musamman: Idan sauran kwakwalwa na rotor ya karkashinsa sauran kwakwalwa na musamman, yana iya aiki a matsayin inganta. Sauran kwakwalwa na musamman ya faruwa daga tarihin kwakwalwa na bayanin ji da kuma adadin poles a cikin motar. ns = 120f/p

Daga baya:

ns shin sauran kwakwalwa na musamman (RPM).

f shi ne tarihi na bayanin ji (Hz).p shi ne adadin pole pairs a cikin motar.

Prinsi:

Idan sauran kwakwalwa na rotor ya karkashinsa sauran kwakwalwa na musamman, tsarin da rotor conductors ke karkashin magnetic field na stator ya kawo gaba, wanda ya haɗa current na rotor ya kawo gaba. Wannan ya samu magnetic field a cikin rotor wanda ya fuskantar magnetic field na stator, wanda ya haɗa electromagnetic torque wanda ya yi lalle daga kan aiki da yan inganta zuwa kan aiki da yan inganta.

2. A Gudanar da Prime Mover na Waje

Alamomin:

Prime Mover na Waje: Ya kamata prime mover na waje (kamar water turbine, wind turbine, ko diesel engine) ya gudanar da rotor zuwa sauran kwakwalwa da karkashinsa sauran kwakwalwa na musamman.

Abubuwan aiki:

• Ingantaccen Zafi: Turbin zafi sun gudanar da induction generators don kawo zafi zuwa energy electric.

• Ingantaccen Ruwa: Turbin ruwa sun gudanar da induction generators don kawo energy ruwa zuwa energy electric.

• Ingantaccen Diesel: Engine diesel sun gudanar da induction generators don aiki a cikin small power stations ko emergency power supplies.

3. Aiki Da Grid Connection

Alamomin:

Parallel to the Grid: Induction generators typically need to be connected to the grid to receive the necessary excitation current. Induction generators cannot provide the required excitation current on their own and must obtain it from the grid or another power source.

Princi:

Idan induction generator ya danganta da grid, excitation current da grid ya ba rotor ya haɗa magnetic field, wanda ya haɗa energy electric. Danganta da grid ya haɗa system stability da reliability.

4. Aiki Da Stand-Alone Operation

Alamomin:

Self-Excited Operation: In some cases, induction generators can operate in self-excited mode, using residual magnetization and parallel capacitors to achieve self-excitation. This method is suitable for small, stand-alone power generation systems.

Princi:

In self-excited operation, the induction generator requires an initial magnetic field (usually provided by residual magnetization) and parallel capacitors to provide the necessary reactive power to maintain generator operation.

5. Variable Speed Generation

Alamomin:

Variable Speed Prime Mover: Induction generators can be used directly for variable speed generation within a certain range, without the need for complex gearboxes or control systems.

Abubuwan aiki:

• Ingantaccen Zafi: Idan sauran zafi yana kawo gaba, sauran kwakwalwa na turbin zafi yana kawo gaba, kuma induction generators sun iya haɗa wannan kawon gaba don kawo variable speed generation.

• Ingantaccen Ruwa: Idan sauran ruwa yana kawo gaba, sauran kwakwalwa na turbin ruwa yana kawo gaba, kuma induction generators sun iya haɗa wannan kawon gaba don kawo variable speed generation.

Muhimman Abubuwa

• Simple Structure: Induction generators do not require complex excitation systems, making them simple in structure and easy to maintain.

• Easy Grid Connection: Induction generators are easy to connect to the grid and are simple to control.

• Economic: Induction generators are cost-effective and suitable for small and medium-sized power generation systems.

Maimaitacce

• Requires Excitation Current: Induction generators need to receive excitation current from the grid or another power source and cannot operate independently.

• Power Factor: Induction generators typically require parallel capacitors to improve the power factor; otherwise, they can affect the efficiency of the power supply.

Summary

An induction motor can be used as a generator under specific conditions, primarily for applications such as wind power generation, hydropower generation, and diesel power generation. By operating at supersynchronous speeds and being driven by an external prime mover, the induction motor can switch to generator mode, converting mechanical energy into electrical energy.