Questions tagged [vector-control]
The vector-control tag has no usage guidance.
31
questions
0
votes
0
answers
27
views
Motor heating up when I change the speed of the PWM generator in my SVPWM
I am trying to implement a current control loop in my PMSM motor using SVPWM. Currently I am running an open loop control using lookup table values for V and F for changing the PWM duty cycle. Now I ...
1
vote
1
answer
57
views
Signal conditioning for a current transducer
I am using a current transducer (LPSR 15-NP) to measure the current that is flowing through my AC servo motor powered by my SVPWM PCB. I have currently implemented an open loop control to the motor ...
0
votes
0
answers
22
views
Current Feedback on a SVPWM board
So I have developed a SVPWM board and an open loop control to run an AC motor. The board and firmware have been tested and the motor runs perfectly on an open loop control. Now I want to use current ...
2
votes
0
answers
20
views
SVPWM board testing for design and development [closed]
I am trying to test the current feedback of my SVPWM board. For safety, I am thinking of connecting a light bulb instead of a PMSM motor. One incandescent light bulb across the U-V phase and nothing ...
0
votes
1
answer
91
views
How to compensate inverter nonlinearities in feedback manner?
I have implemented the direct field oriented control of the three phase induction motor. The control algorithm exploits a speed sensor and machine model based on the Luenberger state observer.
The ...
- 1,061
0
votes
0
answers
115
views
How to limit Vd and Vq in FOC for 3kW , 48VAC induction motor?
I am working on developing motor controller for AC Induction Motor.Following are the specifications of the motor:
Rated voltage:48VAC
Rated power : 3kW
Rated current :54A
Poles : 4
Position feedback : ...
- 11
0
votes
0
answers
74
views
Field Oriented Control for ACIM
I was working on developing software for controlling torque and speed of 3 Phase AC Induction Motors using Field Oriented Control aka Vector Control.
My motor has following details as per the ...
- 11
1
vote
0
answers
246
views
How to design PI controller for the field weakening control of the three phase induction motor?
In the book called Electric Motor Control in the Chapter 8 I have found following field weakening strategy for the three phase induction motor
The aforementioned field weakening strategy is based on ...
- 1,061
0
votes
1
answer
231
views
How to precisely measure the speed of a BLDC motor with an encoder which has 1024 pulse per revolution
I am trying to control a BLDC motor with SVPWM based FOC method. I have a motor with a 1024 pulse encoder. I calculate speed in the encoder pulse interrupt. But I can't directly calculate d(encoder ...
0
votes
0
answers
71
views
How can I increment PWM resolution for PMSM FOC control?
The pwm resolution effect torque ripple value. My motor should be turn low speed . When the motor is turning slowly , the effect can be seen barely. I have 1024 pulse encoder per tour . The hardware ...
2
votes
0
answers
75
views
SVPWM: space vector generation star point shifting - effects?
I keep seeing that the space vector generation (as a part of a FOC) is generated around DC Link / 2. What effects would be expected if the (in this case isolated) star point were permanently shifted?
...
- 21
0
votes
0
answers
116
views
How is implementing FOC on SVPWM switching algorithm?
I have that running SVPWM algortihm with no error. I tried to implement FOC algorithm that switching metod. But I failed. I measure phase currents (Ia , Ib , Ic) when low side switching time. And ...
- 1
0
votes
0
answers
142
views
TVC PID Controller how to adjust angle and thrust?
Hi there I wanted to simulate a rocket landing like for example the falcon 9. I was able to write myself an simulation in which on every loop turn I adjust the angle and thrust. Now this is for school ...
- 109
1
vote
0
answers
50
views
Is V/F maintained constant even in field oriented control or vector control drive of PMSM motors?
I understand that in scalar control V/F is maintained constant below rated speed, as Vector control drive is also a variable frequency drive, I would like to know whether V/F is maintained constant ...
1
vote
0
answers
80
views
Motor vector control and parameters estimation
Vector control methods require good estimation of magnetic flux. In Direct Torque Control it would vector of stator flux. In order to estimate it properly one has to know motor parameters such as ...
- 49
0
votes
1
answer
136
views
What is the effect of MOSFET switching frequency on PMSM FOC drive?
• I have developed FOC drive software for PMSM motor used in an electric scooter.
• Drive works fine but there is noise on the initial start-up. In order to remove it, I tried
many different ...
- 11
0
votes
1
answer
59
views
What would be the expected accuracy in speed and position of a sensorless vector drive motor?
I am looking to do some speed-varying torque tests on a system and drive it with a sensorless vector drive motor. However I'm now unsure of what to expect for accuracy on speed or position at low ...
- 525
0
votes
1
answer
302
views
DC current limiting in FOC for PMSM
I have implemented field oriented control for pmsm motor .
FOC algorithm takes care of phase current limiting.
Can anyone guide me how can we do battery current limiting in foc ?
- 11
0
votes
0
answers
107
views
Necessary Bandwidth of Current Shunt Amplifier in FOC + SVPWM motor control
I am designing a BLDC motor controller using sensorless FOC + SVPWM, planning to use a shunt to measure current, and using an observer to determine the rotor angle. I was wondering, what bandwidth do ...
- 432
1
vote
1
answer
52
views
Why were the phase currents taken instead of voltage as inputs in the space vector moduation method?
Why is it that the currents (ia,ib,ic) are taken as inputs, instead of voltages (va,vb,vc), when at the end, you need to create 3 phase stator voltages for the rotor to catch up with?
- 2,118
1
vote
2
answers
2k
views
Torque and Flux Current
It is said that vector sum of flux and torque current equal to total current drawn by the motor but there are also some currents flowing due to copper losses and rotor leakage inductance. In my ...
- 225
3
votes
1
answer
3k
views
How does HFI (high frequency injection) work with BLDC motors
How does HFI work with BLDC motors.
In this video: VESC HFI: Sensorless position tracking at zero speed he explains how HFI works, however i don't get how it can work with motors that have trapezoid ...
- 432
5
votes
1
answer
2k
views
Difference between SVM and sinusoidal PWM in BLDC
In this answer Answer to question regarding difference between 6-step and FOC, the author said:
"Likewise if you have gone to the effort to implement a FOC you might as well implement a SVM block to ...
- 432
1
vote
0
answers
85
views
Slip Frequency Factors In Indirect Field Oriented Control
I am attempting to configure a asynchronous motor with a IFOC drive. I have an encoder on the motor, however I have been struggling with getting the drive parameterized to operate correctly.
My ...
- 111
1
vote
0
answers
608
views
3-phase BLDC motor resolver problem
I am trying to drive a 3-phase BLDC motor with FOC and have some questions about obtaining resolver offset angle. In the driver I used ABC notation for phases and FOC accepts A phase as 0 angle ...
- 81
1
vote
3
answers
165
views
Vector Control in Induction Motors
Can vector control in induction motors be considered as power factor correction ?
From my researchs, it seemed to me angle between rotor and stator flux is 90 degree when load is purely resistive (...
- 225
1
vote
3
answers
183
views
Vector Control & Slip
I know slip in induction motor determine the current and torque but the point I want to ask, when controlling with vector control it is said stator and rotor flux is always kept with 90 degrees apart ...
- 225
4
votes
4
answers
2k
views
Phasor vs Vector vs Space Vector
I wonder what is the difference between a Phasor, a Vector and a Space Vector? A phasor is also a rotating vector in space then it means that a space vector is same as a phasor? Also by definition a ...
- 857
0
votes
1
answer
1k
views
FOC sensor vs sensorless
I am trying to understand the hardware difference between the sensored and sensorless FOC 3-phase Induction Motor Drive circuit.
So far what I understand is that FOC require following sensors:
1. ...
- 857
4
votes
1
answer
6k
views
Instantaneous vector sum of three phases 120 apart is not zero?
Vector sum of equal 3 phases 120 degree apart is zero and serves as a neutral. However, while drawing instantaneous vectors of the three phases, they summed up all together to give a vector. I have ...
- 61
0
votes
2
answers
883
views
Current increase in induction motor
I have an induction motor which is fed by a three phase inverter. I am trying to use vector control with d-axis aligned with the rotor flux vector.
I have a load which increases its torque as the ...
- 699