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Hello,
I'm looking into this reference design: https://www.ti.com/lit/df/tidrlf7/tidrlf7.pdf .
I have three questions:
1) What could be the reflected voltage? I see D1 is 110V, so it leads me to think they chose a low reflected voltage for this wide input range (64-1260VDC). This is what I...
I will try it to see what happens. I have another basic question about understanding the code. If my setpoint is 500 RPM, and then I lower it to 300 RPM, then the error would be e=300-500 = -200, a negative error. Here again is the I term which compensates for the negative error? As the duty...
For the speed measurement I'm using a 6 pulses per rev reflective sensor. The range of speed I want is from 0 to 3000 RPM. How do I know if the measurement can keep up with the sample rate?
Also, I would like to understand better the code. For example, if the setpoint is reached and the error...
I'm designing an embedded PI controller using a STM32 Nucleo board. In the PWM configuration, a 0 means 0% duty and 800 means 100% duty. The objetive is to regulate the speed of a PMDC motor, i.e, to keep the RPM under load variations. I'm not sure yet if this would work. Does the code keep the...
If the speed goes low because heavy load, I will try to compesate it with increasing duty cycle. I would controlling torque indirectly because I have no current feedback, I just have speed feedback.
What about my question 2?
2- Do I strictly need to know the DC motor parameters (R, L, K, J, B)...
That's actually my doubt. If I strictly need torque control for a treadmill. All I'm doing is speed control using a speed sensor.
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I attach the nameplate of the motor I'm controlling. I have mains full rectified and filtered going into a buck topology. By changing the duty...
I'm controlling a Permanent Magnet DC motor with PWM for a treadmill. I'm using a reflective sensor with 6 pulses per rev to get a speed feedback. So I'm actually doing "speed control" directly, but not "torque control". So I have two specific questions:
1- Do I need direct torque control for...
I thought of that after I got my PCB. Now, physically the current sensor is in the emitter leg. Unfortunately, I have to use it like that for now. For a future design, I will consider placing it in series with the motor. So, how fast would you sample the current in that circuit?
I'm learning how to use this sensor. So, I appreciate any guidance. The sensor is physically located at the emitter leg of the IGBT as said before. So, what useful information about the current can I obtain with this sensor and how? The sensor has overcurrent detection. I'm using this feature...
I'm using this current sensor TLI4970-D050T4 located at the emitter leg of a power IGBT. This transistor is being switched at 10 kHz. How do I choose the convenient sampling frequency for the sensor? My bandwidth is 18 kHz. The IGBT is used in low side switching application to control a DC...
I will use the gate driver configuration shown below:
Gate Driver datasheet
MOSFET Datasheet
As you can see, the 5V and 12V are isolated. I chose this AC/DC converter for the 5V supply. It's 1 Output 5V/3A. It will supply a STM32 and a Raspberry Pi.
I decided to step up the 5V to 12V using...
Hello,
I've selected this MOSFET for a motor control application: IRF200P222
Datasheet: https://goo.gl/nt9Nou
I'm going to use low side configuration.
How do I choose a proper gate driver for this MOSFET? What do you think of this one?
1EDN751x
Datasheet: https://goo.gl/SQ7sRH
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