Questions tagged [pid-controller]
A PID controller is a (closed) control loop feedback mechanism. It is used in industral control for proportional, integral and derivative feedback.
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Why are my 2S LiPo cells swelling/exploding on an ESP32 + TB6612FNG + N20 motor line-follower? Need exact root cause [closed]
I’m working on a small line-follower robot using an ESP32, TB6612FNG motor driver, and N20 gear motors.
Everything works fine initially, but after several runs I notice that:
the ESP32 occasionally ...
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PI current-loop gains from continuous → discrete: do I scale Ki by the sampling time or not?
I’m tuning the FOC current loops for a BLDC motor and computed the PI gains in continuous time. Motor: Leadshine 86BLS58 (datasheet snippet attached). Sampling at(Current PID loops) 10 kHz (Ts = 100 ...
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Torque calculations in AC motor
I am studying the theory of brushless electric motors and do not understand how to calculate the torque delivered by a motor.
Let's assume a PMSM brushless motor using a FOC.
I found these two ...
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Current Loop in motor control, behaviour of Id
Let us assume a torque control of a PMSM motor, where the parameters to be set are Iq and Id.
1) Is it normal that by setting IqRef the rotor rotates clockwise ... while by setting IdRef it rotates ...
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Proportional component in PID is much "weaker" than Integrator
I built a PID controller and connected it to a current driver as presented in the pictures. The problem is that when I change the gain of Proportional by reducing or increasing the output current ...
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PID settings so output is the same as the input, where the output cannot affect the input
I have a HVAC pressure/flow controller that has a 0-10V output that is PID derived from the measured flow that the controller derives from two pressure ports.
What settings would I use to make the ...
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Tune motor controller PI
I am working on an electric car and trying to tune the PI of the current controller. I encounter an overshoot (the controller is shutting down,) but the thing is that, this happens after the setpoint ...
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Current control Mode of buck converter [closed]
From this circuit I have to charge a battery so I have to provide constant 16 A and 85 V at output.
Simulink screenshot is attached.
I’m using current control mode and by using this I’m getting ...
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Which method should I use to convert a analog PID to digital?
I have an analog PID controller and it works well in my system, but for some reasons, I need to use a digital PID controller to replace it.
Try to remain consistent with before as much as possible, I ...
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PID for motor control
In the Texas Instrument document "InstaSPIN-FOC" explains in Chapter 11 how to do PID tuning for PMSMS and AC induction motors.
Specifically, in the speed loop, speedKp = (δ•speedKi) / K ...
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How to identify parametric model of a buck converter?
I have a buck dc-dc converter
My goal is to identify a dynamic model of this circuit. The model shall serve for design of the inductor current control loop. Until this moment I thought the model in ...
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Random carrier PWM for the dc-dc converter
I have been implementing a control software for the buck dc-dc converter. The converter with following parameters \$R_L=19.0\cdot 10^{-3}\,\Omega\$, \$L=10^{-3}\,\mathrm{H}\$ has a battery at its ...
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Filter in the feedback path of the current control loop
I have a current control loop of a dc-dc converter (for the question it doesn't matter what is its topology). The control loop has following configuration (\$D (s)\$ is a transfer function of the ...
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Help on PID circuit design
I am trying to design an analog PID circuit. I am trying to understand the resetting part of the integrator stage. I have found the following circuit.
I am a bit puzzled by the AUTO-RESET part of the ...
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Using Bode plots for locking a laser to a cavity
I am new to this topic, but I am trying to understand how to use Bode plots to optimize my PID loop parameters for PDH locking a laser to an ultrastable cavity. For simplicity (and based on what I ...
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How to handle the noise and wrong measurements due to the actuator in a close-controlled loop [closed]
My system has to inflate a rubber device using a diaphragm pump to a specified pressure (about 1000 Pa, with an ideal accuracy of ±50 Pa). The volume of the device is about 3 L.
The pump is connected ...
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Transfer function of differential controller
I found an op amp circuit that is designed to be a derivative controller (D-controller)
simulate this circuit – Schematic created using CircuitLab
and the transfer function $$ \frac{V_o}{V_i} = -...
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Heating element with SSR
I have a 3-phase, 240 V, 3 kW heating element that I intend to control via PLC ==> PWM==> SSR.
In case this control methods fails electrically, how do I prevent (limit) my heating element to go ...
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How to use an emergency button for an SSR controlling 3kW heaters
I'm working on a temperature control project for airflow utilizing a 3kW heater, an SSR, and a PID controller.
For safety purposes, I need to incorporate an emergency button to immediately cut off ...
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Solenoid valve gating and time proportional control
I'm trying to complete this simple task:
I have solenoid valves to control the humidity in an array of boxes. I use time proportional PID control to turn them on or off. I suspect I keep wearing them ...
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Transfer function of a heating system
I wanted to design a small temperature-regulated DC heater for the sake of educational purposes in the field of control theory.
The idea is to heat up a resistive element through a buck converter of ...
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What are the advantages of implementing an optimization algorithm for PID tuning compared to classical methods?
I am new to studying algorithms, so I am wondering what are the advantages of using an algorithm such as Genetic Algorithm or PSO to tune the PID parameters compared to classical methods, such as ...
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Unit of integral windup reset parameter?
What is the unit of integral windup reset parameter? Is it the same as the unit of time, seconds?
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Gimbal platform control using a DC motor
I need to make a gimbal stabilization platform for a project. I should be able to control both speed and position (a servo or stepper motor are not suitable for this reason.) There are DC motors with ...
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PI controller for LLC converter does not work under all conditions
I used this paper as a reference. I am simulating a half-bridge LLC (350V-400V input to 12V output) with a PI controller. You can find the MATLAB Simulink model I have here. All the parameters are ...
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