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Current Control Loop Tuning
Below I have attached two images. The first one our motor operating at 20A Iq. The second is the motor at 40A Iq. I'm sampling at 2 Mega Samples per second and then running the post op amp current...
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How to control power generation in ACIM
We are testing a high current ACIM for use as a generator.This uses custom hardware controlled by a 28069 microcontroller.It uses an encoder for position calculation and the slip magnetic angle from...
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Phase current problem at motor high speed
(Please visit the site to view this file)Hello guysI am using InstaSpin for E-mobility application; this soluction is running on C++ code, keeping the InstaSpin libraries in C code. The user.h file is...
View ArticleSpeed Limitation while using Torque Mode
Hello Guys,I am using MotorWare for a university project. We have an experimental electrical car, and want to use InstaSPIN for control. We have adapted the HAL to our custom platform, and for safety...
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how to set a ADC current offset for the other PIN
In my application,I need detect the bus current,so I add hall sensor on bus line.the1.65V±1.65V output signal PIN of hall sensor connects ADC-B5 PIN of 28069M.In <motorware_hal_tutorial>,it can...
View Articlerelationship between rotor flux, Ke, Kt
Dear Sir,From user manual(spruhj1f, Page 396), the rotor flux (which is also equal to the back-EMF constant (Ke) in SI units). Also,Mtr(s)=3/4*P*rotor flux; ??? since it is the transfer function...
View ArticleUnderstanding the #define USER_ADC_FULL_SCALE_CURRENT_A (value) used in the...
I am using just MotorWare v1.01.00.14 code. I am using both the DRV8301_69M_KIT and alternatively the LAUNCHXL_28069M kit (with a BOOSTXL_8301 board)I am trying to understand the (value) used in each...
View ArticleIs Instaspin proprietary?
hello, I'm interested in sensorless BLDC control with an FPGA. (my project is restricted to use FPGAs instead of TI processors). In my searches, I found Instaspin. I found a video that introduces...
View ArticleCompute Back EMF
Dear Sirs, In manual spruhj1f, Page 411 Figure 11-19, Decoupled PI Controllers for a PMSM Vq = PID_q_out + id * ω * Ls + ω * KE ; I want to use “USER_MOTOR_RATED_FLUX * ω(rad/s) * 2 * 3.1415 “to...
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Why speed and current PID controller use different algorithm?
Dear sir/madam, In InstaSpin lab, the speed PID controller is in parallel form, while the current PID controller is in series form. I don't know what cause them different. Best...
View ArticleResolution of FAST speed estimation
Hello,you can read "reliable and robust estimation of flux, angle, speed and torque across use conditions", "Best speed input into the control System", "high quality feedback signals", ...but is there...
View Articlerelationship between rotor flux angle and Iq for IPM
Dear sir/madam, I read SPRUHP4.pdf, and see "Ideal Orientation: 90 degrees for non-salient synchronous; slightly more for salient machines, and slightly less in asynchronous machines since part of...
View ArticlePrecise units for the identified gMotorVars.Flux_VpHz
Hi ChrisI am having some contradictory expediences trying to interpret the parameter: gMotorVars.Flux_VpHz.Can you tell me what you understand the units of this parameter to be? In particular - I...
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So, Which PWM Technique is Best? (Part 1)
Dave Wilson, Motion Products Evangelist, Texas InstrumentsSo, which PWM technique is best for your motor control application? In case you haven’t guessed, this is somewhat of a trick question. It’s...
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Electric Power Steering Turns the Corner
Dave Wilson, Motion Products Evangelist, Texas InstrumentsDid you know that your hydraulic steering system wastes more energy than any other system in your car and is third highest in total vehicular...
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The Ten Commandments of Digital Control (Part 5)
Dave Wilson, Motion Products Evangelist, Texas InstrumentsFor those of you just joining our discussion, we have been counting down the “Ten Commandments of Digital Control” all this week, leading up to...
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The Ten Commandments of Digital Control (Part 4)
Dave Wilson, Motion Products Evangelist, Texas InstrumentsThis week we are counting down the Ten Commandments of Digital Control, and we are only one day away from the NUMBER ONE Commandment. Before...
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The Ten Commandments of Digital Control (Part 3)
Dave Wilson, Motion Products Evangelist, Texas InstrumentsWe are now halfway through our countdown of the “Ten Commandments of Digital Control”. Yesterday we discussed the Analog-to-Digital Converter,...
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The Ten Commandments of Digital Control (Part 2)
Dave Wilson, Motion Products Evangelist, Texas InstrumentsThis week, we are counting down to the number one commandment of digital control. Yesterday I discussed more generic issues related to...
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The Ten Commandments of Digital Control (part 1)
Dave Wilson, Motion Products Evangelist, Texas InstrumentsDespite the fact that I now work for the Microcontroller Division of Texas Instruments; deep down, I still consider myself to be an analog...
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