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1. Implementation of an Embedded Induction Motor
Test and Analysis System
As induction motors are widely applied in the variant of fields, such as industry,
agriculture, transportation, etc., testing induction motors is paid a lot of attention. Many
researchers have put a lot of effort and time on this issue. In the past, many efforts have been put
on how to build the induction motor test systems with the traditionally single chip
microcontrollers. The problem is that the systems based on the single chip microcontrollers are
not flexible, the computing and processing speeds are slow, and the storage for the interprocessed data is small. When the accuracy of analysis and diagnosis is critical and the real-time
demand is necessary, the systems mentioned above cannot meet the needs.
Existing System:
In the existing system the induction motor is tested and analyzed using current and
voltage sensor and requires some complex hardware’s to test the induction motor.
Proposed System:
The PIC microcontroller has higher processing speed than the single chip
microcontrollers, which can meet the real-time need. Its large storage spaces of ROM and
EEPROM are enough for some intermediate processes. Furthermore, the plenty of the hardware
peripherals and mixing programming with languages of C and assemble can make the test system
flexible and portable. The size of the test system can be quite small and compact. This embedded
induction motor test and system is built up with the PIC16F877A microcontroller. The current
and voltage of the stator winding is measured using sensors. PIC microcontroller has inbuilt
ADC which converts the sensor values to digital and the digital data is transferred to PC through
serial port. The induction motor current and voltage is measured for different speed. Using PWM
technique the induction motor speed is varied by varying the duty cycle and time period from
PC.

2. Block Diagram:
Power Supply
Current Sensor
Voltage sensor
PIC
Microcontroller
Max232
PC
Keypad
Driver Circuit
Hardware requirements:

PIC16F877A Microcontroller.

Current Sensor.

Voltage sensor.

Keypad.

Max 232 circuit
Induction
Motor

3. 
Driver Circuit.

PC
Software requirements:

Embedded C

MPLAB or CCS Compiler.
 VB
Advantages:

Precise speed control is achieved using PWM technique.

Fast switching and control.