Mai wani a hysteresis motor?

Mai haka ɗaya da Hysteresis Motor?

Bayani game da Hysteresis Motor

Hysteresis motor yana nufin motoci mai zurfi wanda ya yi amfani da kasa a rotor. Hysteresis motor yana nufin motoci mai zurfi da rotor mai dajiya da ya yi amfani da kasa a rotor da aka bari na ferromagnetic material da dukkantarki mai ba suka shiga.

Girman Hysteresis Motor

• Winding stator mai dajiya

• Shaft

• Shading coil

Stator

Stator na hysteresis motor an kiranta don samun maye mai zurfi daga supply mai dajiya. Yana da duwatsu: winding mai gaba da winding mai taimakawa. A wasu girman, stator yana da poles masu shading.

Rotor

Rotor na hysteresis motor an barar da material mai zafi da ya da muhimmanci ga kasa. Misaal na wannan material sun hada da chrome, cobalt steel ko alnico ko alloy. Kasa ta zama da zafi saboda area mai yawa na hysteresis loop.

Prinsipin Nemo

Nemo na hysteresis motor yana nuna cewa abin da ita da motoci mai induksi mai dajiya da abin da ita da motoci mai zurfi. Abin da ita da nemo na hysteresis motor yana nuna cewa:

A lokacin da stator ya fara da supply mai dajiya, ya fara da maye mai zurfi a stator.

Don ci gaba da maye mai zurfi, winding mai gaba da winding mai taimakawa suna buƙata da supply mai dajiya a lokacin da ita da a lokacin da ita.

A lokacin da ita, maye mai zurfi a stator ya haɗa voltage mai biyu a rotor. Wannan ya haɗa eddy currents a rotor, wanda ya faɗa torque da ya fara da rotor.

Saboda haka, eddy current torque ta fara da hysteresis torque a rotor. Hysteresis torque a rotor ta fara saboda material mai zafi da ya da retentivity mai yawa.

Rotor ya fara da slip frequency idan ya fara da steady state running condition.

Saboda haka, za a iya cewa rotor ya fara da rotate da eddy current torque da ya fara da induction phenomenon, kuma ya nuna abin da ita da motoci mai induksi mai dajiya.

Kasa na Hysteresis

f r yana nufin frequency na flux reversal a rotor (Hz)

Bmax yana nufin maximum value na flux density a air gap (T)

Ph yana nufin heat-power loss da ya fara da hysteresis (W)

kh yana nufin hysteresis constant

Torque-Speed Characteristics

Hysteresis motor yana da torque-speed characteristic mai yawa, wanda ya ba ita da inganci don wasu loads.

Types of Hysteresis Motors

Cylindrical hysteresis motors: It has cylindrical rotor.

Disk hysteresis motors: It has annular ring shaped rotor.

Circumferential-Field hysteresis motor: It has rotor supported by a ring of non magnetic material with zero magnetic permeability.

Axial-Field hysteresis motor: It has rotor supported by a ring of magnetic material with infinite magnetic permeability.

Advantages of Hysteresis Motor

• As no teeth and no winding in rotor, no mechanical vibrations take place during its operation.

• Its operation is quiet and noiseless as there is no vibration.

• It is suitable to accelerate inertia loads.

• Multi-speed operation can be achieved by employing gear train.

Disadvantages of Hysteresis Motor

• Hysteresis motor has poor output that is one-quarter of output of an induction motor with same dimension.

• Low efficiency

• Low torque.

• Low power factor

• This type of motor is available in very small size only.

Applications

• Sound producing equipments

• Sound recording instruments

• High quality record players

• Timing devices

• Electric clocks

• Teleprinters