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Hi, The ckt as as draw as attached, is a auto/manual control panel board for pump-motor and trying to configure to run with MCU control auto operation and manual (with start/stop button in board). With the panel here i have included 2 nos relay: Relay-1, NO, parallel connected to START BUTTON and Relay-2, NC, series connected with STOP BUTTON for
I have a open loop TF given by 2s+100/s^2. As stated in theory, type 2 system should provide zero steady state error for velocity inputs. Could any body explain the limiting factor of this velocity. I mean, what is the maximum velocity input that this system can track?
The graphs on a datasheet are usually for a Mosfet or transistor with "typical" spec's. Yours might have different minimum or maximum spec's. The text in a datasheet shows minimum and maximum spec's. You will need to design a circuit with an adjustment for matching the spec's of the Mosfet you use. Sometimes adding negative feedback can reduce the
Hi all, Firstly, I'm a foundry process engineer, with very limited knowledge about circuit design. My question could be silly. Please kindly give me indications easier to understand. :-) I'm told that good process variation control can save chip size, but I don't really know the reason. I guess it could be associated with timing. For instance
This has nothing to do with LEDS :) Many power converters are liable to saturate the transformer under unbalanced conditions, I am looking at a full bridge with a bridge rectifier output so there are plenty of oppertunities! The standard method to reduce the problem is to use peak current control. In my case I wish to use average current mode, a
You have 15A per branch or 22.5 W per 0.1 ohm resistor. Sounds conservative. I'm not aware of any laser diode application with ms pulse width, thus I don't want comment the application and circuit in general. How did you arrive at the current control loop design? Did you check its stability? Also some other circuit details like capacitor C9 l
Hi All, I'm a foundry process engineer, with very limited knowledge about circuit deign. My question could be silly. Please kindly give me some indications which are easy to understand. :oops: As title, I'm told that good process control can effectively save DIE size, but I don't really know why. Someone ever told me designers can use smaller
Hi, Some of the issues of post#1 are still unclear. I don't want to ask again... Before that we take a piece of paper and a pencil to write down the variable values /states.. ..I recommend you do this first ... and show us (I think it's less effort for you, because it's hard to debug foreign, mainly undocumented code. Additionally you should kno
To me it looks like the loop is unstable, but you really do need a longer run time to be sure. I recommend checking the VCO tune range first, it looks like the vctrl needs to be nearly railed high in order to flip from "up" to "down" charge pump control. That it does so, indicates that at least the phase detector works. But this may be a cause o
I am developing a test rig for my motor controller. Below is the image which shows a motor is connected back to back to act as a load with load resistor 156455 left side is the controller that will run the motor of 400W. Right side i am connecting another motor with a coupling in between and resistor R1, R2, R3 a
Hi, I used a microcontroller dsPIC33FJ16GS504 for on grid microinverter. In compensator design circuit (attached) current compensator block I want to implement in microcontroller in which PI compensator is used as per the document (for details are available in microchip document AN1444). I know basic about the PI controller but how to (...)
The NCP4306 offers synchronous rectifier control for a flyback in CCM/DCM/BCM. Do you believe that this IC looks a little dubious? I would say that this dubiousness is also found in many other manufacturers? similar offerings All these type of Flyback sync rect controller ICs make me prefer just putting multiple diodes in parallel ,
Hello We are doing Boost converter PFC?d LED driver in Constant off time using LT8312 controller. (0-300W, 240VAC) LTspice sim and pdf schem attached. We are adjusting the power throughput by adjusting a control voltage into the Vc pin. (This is possible because it?s a transconductance error amplifier) Do you know what is the (...)
What are sequence to initialize hd44780 display device ? . are given in page 42 to initialize in 4 bit mode but the table it seems confusing me 1. Display clear 2. Function set: 3. Display on/off control: 4.
hi guys i am using stm32f429 In my application I need to provide clock input to a AC Servo Drive. i must generate a pulse and control frequency and number of pulse. i am going to control frequency from 1Hz to 200KHz (with 1Hz Resulotion) and control number of Pulse between 1 Pulse to 4294967296 Pulse (a 32 bit variable). i use timer 1 (...)
The problem is 74LS164 can't hold these outputs, continue "pushing" it and D0->D7 = 00000000. Consider a latch or synchronous register if you want to see the result longer than one clock cycle. I have more general problems with your circuit. How are the clock and control signals generated. You are apparently assuming, that the re
Somewhere down the subthreshold slope, you bump into the leakage floor. If you're close to the "knee" (or maybe it's the elbow) you can expect worsening match, loss of current mirror fidelity (esp if any DIBL behavior), or loss of control (try to throttle below leakage floor, no bueno). I'd say you want to stay a decade above the highest obs
Hello, On my custom designed PCB, I use a STM32F7 processor. I control a SPST switch with TIM ISR. I establish a serial interface with SPI2 for a DAC control. Also I have an external ADC which is controlled with SPI4 DMA mode. Now I call the SPST and DAC control commands with TIM ISR. For the ADC, I call the SPI DMA (...)
hello all anyone control a synchronous motor AC 12V ? i wnt to use Power DC 12v , then make a circuirt DC -AC 12v 50hz to it work. However, when use a Square 50hz , i hear sound from motor ,it noise . Any idea to it work smooth ?
You didn't tell about the involved synchronous machine, is it PMSM or DC excited? Inverter bridge starts to charge the battery if e.m.f. peak is exceeding the bus voltage. One other question is can i also switch in the generator mode? If e.m.f. can't be sufficiently reduced by excitation control, the usual way to switch to a safe