Alternating Reversing Sequencing Space Vector PWM in DMC Library?
Hello, I am trying to implement Alternating Reversing Sequencing SVPWM generation as discussed in Dave Wilson's Teaching Old Motors New Tricks. Would this be the same as SVGEN_DPWM (Discontinuous...
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...
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 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...
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instaspin foc, abnorml current waveform,application in water pumper.
I’m testing a BLDC,AC 230V in, 2HP, 8 poles,2850RPM rated,application in water pumper. hardware referenct HVKIT. use mcu 28027F.motorware version: motorware_1_01_00_14ccs Version: 6.0.1.00040.the...
View ArticleCurrent Regulator Problem
We're running a BLDC motor in torque-control mode, using Lab 04a on a DRV_8301 EVM kit with a 28069 Control Card. We ask for a particular amount of Q-axis current and then vary the load. The system...
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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 ArticleSVM Waveform Generator Equation
Hello guys,In his simulation model, of space vector modulation, Dave Wilson used a different method for generating the SV modulated waves (Vmod_a, Vmod_b & Vmod_c).Where can I find the mathematical...
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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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...
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Teaching Your PI Controller to Behave (Part I)
Dave Wilson, Motion Products Evangelist, Texas InstrumentsRichard Poley manages the training activities for our C2000 microcontrollers (MCUs), and co-teaches the TI Industrial Control Seminar series...
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Teaching Your PI Controller to Behave (Part II)
Dave Wilson, Motion Products Evangelist, Texas InstrumentsIn my previous blog on this topic, we briefly reviewed the history of the PI controller and presented two forms that are commonly used today....
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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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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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Is it a wrong formula about input power
I found a post about power calculation: https://e2e.ti.com/support/microcontrollers/c2000/f/902/t/406263// Equations for input power float_t input_power_sf = _IQtoF(gAdcData.dcBus) * (float_t)(0.5 *...
View ArticleCurrent and voltage waveforms measure
Hi forum,I have a silly question.I am using DRV8301 with F28069M controlCARD. I want to measure the current and voltage waveforms. Where and how should I do this?Thanks for any help.
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How to handle voltage transitions at lower RPMs (850-1000RPM) using...
Hello,I am running into an issue where when external DC power (19V) is removed from the unit and the system transitions to internal battery power (14V) and the motor is at a low RPM setting (850RPM –...
View ArticleMaximum torque per amp strategy for IPM motors
Hello,I'm trying to find a way to get maximum torque per amp out of an IPM (interior permanent motor). I do have a resolver mounted on the motor, but as the optimal angle changes with current (and...
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Is it a wrong formula about input power
I found a post about power calculation: https://e2e.ti.com/support/microcontrollers/c2000/f/902/t/406263// Equations for input power float_t input_power_sf = _IQtoF(gAdcData.dcBus) * (float_t)(0.5 *...
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