This weekly report summarizes the progress of the 361 Degree Happiness Company engineering team. They added a remote control with buttons to select modes and control noise levels and time displays. The report also describes the team member's study of inverters, which are used to convert electrical energy to mechanical energy for motors through varying voltage and frequency. Inverters allow for less noise and energy savings but have a higher price. Next week, the team will learn more about other inverter functions.

1. [INC 281 MULTIDISCIPLINARY WORKSHOP WEEKLY REPORT] March 21, 2012
Name-Surname Krongkaew Saowaros
Student ID. 53211802
Group Name 361 Degree Happiness Company 
Engineering Team Baitong 53211802
Members Toey 53211807
Bank 53211814
Pui 53211838
Product Design P’ Earth
Team Members P’ Ka-tai
P’ Klao
P’ Chompoo
Weekly Progress
Over all
This week we have added a remote control for ease of use the appliance.
The remote control included
> Button to select the mode
> To reduce the noise level
> Time
> Display
Engineering Knowledge
This week I have studied the inverter, The AC drives or inverter is an electronic device that is
used for speed control. Motors orAC induction motors. (Sometimes referred to
as "a synchronous motor”) An electric motor. Used to convert electrical energy. Into mechanical
energy. The energy has to be driven to the speed of the motors and other machinery. Can be
defined by
1. Of the load torque.
2. Number of motor poles.
3. Frequency of the power supply to the motor.
4. Voltage supply to the motor.
And the voltage of the inverter frequency. By the way, the privatization wave of pressure.
Can be done in several ways.
1. To convert the DC voltage (PAM: Pulse Amplitude Modulation).
2. To vary the width of the pulse on - off transistor (PWM: Pulse Width Modulation).
- The Square Wave.
- A Sine Wave.
Strong Point - Inverter motors are less noise and save energy.
Week Point - Inverter motor has high price.
Next week Job - I will need to learn other functions.
Department of Control System and Instrumentation Engineering
KING MONGKUT’s UNIVERSITY OF TECHNOLOGY THONBURI