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Hi,
Basis on you given advices, i maid a circuit as attached. It works fine for over current and motor not connected perpose. But today i tried to connect a short circuited motor to our circuit. It burned out resistence R2 and shorted to diode D4 also due to the high voltage/current flow.
My...
You are right, we can use direct ac to adc. But need some protection against any type of high voltage spike and short circuit in primery. We can remove capacitor and discharge resistance.
Now my question is... 1:1 CT will work that i descibed (10 turns of primery and 10 turns of secondary in a...
Realy i was thinking about this. If i use 10 turns 18awg wire in primery and 10 turns 18awg in secondary. It will be 1:1 CT and easily solves my problem. I also attached schematic for same.
We use the attached circuit for 10A:1A CT. But for this motor we need a some accurate circuit.
I was looking for the same as you described. Shunt or hall effect based linear current sensing circuit.
No matter, we using lm339 output for protection or alarm perpose.
Thanks for your reply....
Basically i need to generate a alarm when motor current cross the permissible limit or lower the nominal current.
No need any type of motor current/voltage control circuit. It's just testing the motor is working fine or not.
If i able to use a CT. I use a comparator...
Hell experts,
I have a 230vac 3watt motor and want to sense it's current for over current protection. I can not use a current transformer available in market due to very low power consumption and less accuracy. Motor nominal current will be approx 0.012A to 0.02A.
Please suggest me a better...
Hamm
May be not protect to every pin from electrostatic discharge. I never seen any additional circuit with 7seg display. It will be best practice if external protection against ESD, EOS etc.
Second is temperature, that i didn't measure. May be it can be cause of fault. A 0.5va 230 to 12v...
Hello experts
I made a pcb with pic18f25k20 microcontroller. I programmed it and powered it for few days. After 2 weeks microcontroller pin that connected with 7segment/3digit display dot pin stopped to working.
In the circuit microcontroller pin connect to 7seg pin with a series resistance...
Hi Klaus
Actually i told my PLC maximum PWM speed. It will be 0 to 10khz or 0 to 100khz.
I need sign type microstepping and PWM control.
My motor current is 6A. I searched a complete stepper driver ic, but did not find for 6A.
I can write some codes in a microcontroller to get my work done...
I want to control motor by PLC, PLC is able to generate pulse approx 10k-100khz. But limited output and we are planning to control 10 numbers of stepper motor.
I need just a stepper driver ic that generate motor switching sequence with at list 1/32 microstepping and control switching speed with...
Hello experts,
I need a dedicated stepper motor controller ic to drive DRV4832 bridge ic. I found L297 ic that control L298 H-Bridge ic. Can L297 control DRV4832 or other ic like L297 that fit with DRV8432?
Hello,
I am implementing a function for add or subtract variable value according to button pressed time.
When i press button for a short time it should increase or decrease 0.1 from variable. When i press button for 4-5 second, it should increase or decrease 1 from variable. When i press...
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