Speed Control Of Seperately Excited Dc Motor By Varying Armatute Voltage Using Single Phase Half & Fully Controlled Bridge Converter

Microcontroller based PWM Controller

 This PWM/Firing pulse controller is designed based on Dspic30f4011 controller chip from “MICROCHIP” company  and  this controller can be used  to generate  PWM Signals for SCR, IGBT based power electronics application like DC-AC Inverter ,DC-DC Chopper & SCR  converter based AC/DC/BLDC Switched Reluctance Motor (SRM) control application. PWM output of this controller can be directly interfaced with Power Module through External cable connection.

Features

• Includes High-Performance Microchip dsPIC30F4011 Microcontroller with 48kb Internal Flash Program Memory
• 6 Numbers of PWM Outputs up to 15KHZ of switching frequency
• Internal EEPROM &Five 16-bit Timers
• Power, Programming and Test LED’s
• 2MB PROM & 24 Mhz clock speed
• QEP Sensor /Hall sensor/Speed sensor(Proximity)Interface connector on front panel
• PWM increment & decrement key &Reset switch is provided
• 20 X 4 LCD screen &PWM outputs are terminated by Front panel Connector
• 230VA INPUT with Power ON/OFF switch

1 Ø SCR POWER MODULE

This power module is designed by using SCR & DIODE  for AC-DC Controlled Converter applications This power module can be used for DC Motor open loop & closed loop speed control application by   external PWM controller interfacing

• SCR based Half & Fully Controlled Converter
• Four numbers of SCR, Ratings @ 1200V @ 25A, fixed With proper heat sink for cooling and Snubber circuit
• Two numbers of Diode ( 35A , 1200V) with With proper heat sink for cooling and    Snubber circuit
• 4 numbers of Pulse amplifier & 1;1 Pulse transformer for all pulse isolation
• One numbers of 230/9V Supply synchronizing transformer & ZCD Circuit is provided for SCR Pulse generation
• MCB provided for input power ON/OFF
• SCR &Diode outputs and AC inputs are terminated in banana connector
• Specifications- Input- 230VAC, Output – 0-200V AC/DC @ 5A , Suitable for RL load & Motor Control applications

 DC Shunt Motor with load set up

• Type             :           DC Shunt Motor
• Power :           1 hp
• Voltage             :           200vdc for Armature & Field
• Speed                                                 :           1500 RPM
• Feedback sensor             :           Proximity sensor
• Loading             :           spring balance loading
• Make             :           BENN /RAMSON/OMEGA
• One number Brake DRUM with spring balance set up is coupled with the above motor
• Two numbers of dial indication for Load in Kg measurement All are mounted on a powder coated mechanical set up.