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PROJECT DESCRIPTION

A single phase capacitor run induction motor is usually asymmetrical wound motor. It consists of two coils(main and start winding) and capacitor. The main winding is designed to take the load current. The current flowing through the start winding having a capacitor in series, is much less than the main winding. The value of the capacitor is so chosen that the total impedance on the start winding produces sufficient phase shift of about 90 degrees to generate a rotating magnetic field. In order to produce the magnetic force produced by the start winding very near to the main winding the start winding has additional turns, higher resistance and reduced current flowing through it. This makes the motor windings asymmetrical. The main goal of this project is to generate 90 degree sufficient phase shift between two phases using 8051 microcontroller and three phase bridge by eliminating capacitor.

The proposed system uses a microcontroller of the 8051 family and a rectified power supply. Here one 3 phase bridge comprising of MOSFET bank (inverter)  is used for developing  two phase power with 3 wires to run the induction the single phase motor.The bridge is interfaced to the microcontroller with the help of the Opto-isolators and MOSFET drivers. Opto-isolator is used for isolating devices. The MOSFET driver is used for developing upper side and lower side drive of the MOSFETs. Snubber circuit limits the switching transient, which is connected across the MOSFET. The push button switch acts as an input device, which is interfaced to the microcontroller.

In this DC supply is produced from the single phase AC after rectification, which is then fed to the 3 phase inverter with 6 numbers of MOSFETs. In 3 phase bridge connection  one terminal  is used as the common and the other two as 2 phases, out of phase by 90 degrees to each . The program also takes care of reversing the rotation automatically by reversing the phases upon a push button operation.

×

A single phase capacitor run induction motor is usually asymmetrical wound motor. It consists of two coils(main and start winding) and capacitor. The main winding is designed to take the load current. The current flowing through the start winding having a capacitor in series, is much less than the main winding. The value of the capacitor is so chosen that the total impedance on the start winding produces sufficient phase shift of about 90 degrees to generate a rotating magnetic field. In order to produce the magnetic force produced by the start winding very near to the main winding the start winding has additional turns, higher resistance and reduced current flowing through it. This makes the motor windings asymmetrical. The main goal of this project is to generate 90 degree sufficient phase shift between two phases using 8051 microcontroller and three phase bridge by eliminating capacitor.

The proposed system uses a microcontroller of the 8051 family and a rectified power supply. Here one 3 phase bridge comprising of MOSFET bank (inverter)  is used for developing  two phase power with 3 wires to run the induction the single phase motor.The bridge is interfaced to the microcontroller with the help of the Opto-isolators and MOSFET drivers. Opto-isolator is used for isolating devices. The MOSFET driver is used for developing upper side and lower side drive of the MOSFETs. Snubber circuit limits the switching transient, which is connected across the MOSFET. The push button switch acts as an input device, which is interfaced to the microcontroller.

In this DC supply is produced from the single phase AC after rectification, which is then fed to the 3 phase inverter with 6 numbers of MOSFETs. In 3 phase bridge connection  one terminal  is used as the common and the other two as 2 phases, out of phase by 90 degrees to each . The program also takes care of reversing the rotation automatically by reversing the phases upon a push button operation.

PROJECT HIGHLIGHTS
Call/mail for Tech Support from 10 am - 7 pm IST.
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
×
Call/mail for Tech Support from 10 am - 7 pm IST.
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
BLOCK DIAGRAM
Hardware Requirements
  • 8051 series Microcontroller
  • MOSFET/IGBT gate driver
  • Toggle Switches
  • Crystal Oscillator
  • Resistors
  • Capacitors
  • Diodes
  • Transformer
  • Voltage Regulator
  • Crystal
  • opto-isolators
×
  • 8051 series Microcontroller
  • MOSFET/IGBT gate driver
  • Toggle Switches
  • Crystal Oscillator
  • Resistors
  • Capacitors
  • Diodes
  • Transformer
  • Voltage Regulator
  • Crystal
  • opto-isolators
Software Requirements
  • Keil compiler
  • Language: Embedded C or Assembly
×
  • Keil compiler
  • Language: Embedded C or Assembly
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