Thyristor Controlled Power for Induction Motor
The project is designed to control AC power to a load by using firing angle control of thyristor. Efficiency of such power control is very high compared to any other method.
The project uses zero crossing point of the waveform which is detected by a comparator whose output is then fed to the microcontroller. The microcontroller provides required delayed triggering control to a pair of SCRs through opto isolator interface.
Finally the power is applied to the load through the SCRs in series. This project uses a microcontroller from 8051 family which is interfaced through a push button switch for increasing or decreasing the AC power to the load.
A lamp is used in place of an induction motor whose varying intensity demonstrates the varying power to the motor. The varying power results in variation in speed of the motor.
The project can be further enhanced by using direct 230 volt supply instead of 12 volt AC to the bridge rectifier for achieving higher voltage control for charging number of batteries in series.
- Easy to use, Self-explanatory kit.
- All-inclusive solution kit.
- Extensive audio-visuals available.
- Branding-free material.
- Pre-programmed Microcontroller.
- Load Switch @ Zero Voltage.
- Call/mail for Tech Support from 10 am - 7 pm.
- Can be Customized for Arduino, Raspberry Pi, PIC
- 8051 series Microcontroller
- Opto isolators
- Push Button
- Voltage Regulator
- Keil Complier
- Languages: Embedded C or Assembly
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In my engineering days, we used to struggle replicating a PCB model from our text books with real tools. We had a tough time with the circuits and most of the time - they used to fail. So I wanted to solve this problem not just for myself but for all my fellow students like you. Young, energetic and knowledgeable youth who really want to learn but still cannot afford to fail with the project because it matters and the colleges rarely help us out productively.
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Order No: BLR2933
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Q: Which microcontroller is used in this project?
A: A 40 pin 8051 microcontroller is used in this project.
Q: What is thyristor AC power control?
A: By using push button provided, we can control the power to the load. This can also be done with Bluetooth.
Q: Can I place motor instead of lamp?
A: Yes motor with rating, up to ¼HP 230V AC, can be placed instead on lamp.
Q: How is the bulb intensity varied?
A: The bulb intensity can be varied by delaying the firing angle of Thyristor, so as to control its triggering.
Q: What are the thyristors used?
A: 2 back to back connected SCRs are used as thyristors.
Q: Why SCRs are preferred instead of relays?
A: SCRs are accurate timing devices compared to relays.
Q: What is the formula for calculating smoothing capacitor value?
A: There is some approximated formula .Peak to peak ripple voltage = Load current in amps / (2*line frequency in hertz *capacitance in farads). But as rule of thumb for 1 A current 1000uF is best. Thus it is load dependent.