Feedback:
Can you verify if your commutation tables follows the steps outlined in the table shown in the following blogs?
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RE: DRV8323R: 6-step commution with 6x PWM Mode
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RE: DRV8847SEVM: External I2C communication connections
Weiqi,
The SDA and SCL lines are pulled up to the 3V3OUT power net. Can you probe the pullup resistors on the board to ensure that the supply is actually at 3.3 V? If it is 1 V, then you may need to supply 3.3 V from an external supply and disconnect the USB. When you do this, check the current from the supply to see if the board is drawing more than you would expect (>50 mA would concern me).
Also check your C2000 I2C GPIO to see if you get correct voltages you expect there.
In the meantime, I would recommend ordering another EVM in case you have damaged the current one.
The SDA and SCL lines are pulled up to the 3V3OUT power net. Can you probe the pullup resistors on the board to ensure that the supply is actually at 3.3 V? If it is 1 V, then you may need to supply 3.3 V from an external supply and disconnect the USB. When you do this, check the current from the supply to see if the board is drawing more than you would expect (>50 mA would concern me).
Also check your C2000 I2C GPIO to see if you get correct voltages you expect there.
In the meantime, I would recommend ordering another EVM in case you have damaged the current one.
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RE: DRV8823: V3P3 power up delay at -5 degree C
Hello Howard,
Are they seeing this on multiple units? Can they swap the part?
Are they seeing this on multiple units? Can they swap the part?
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DRV8823: V3P3 power up delay at -5 degree C
Part Number: DRV8823
Hi,
my customer is driving stepper motor with DRV8823.
They can drive the motor well at normal temperature, but need to wait for a while for the motor to run at -5C with the same control signal.
They found the problem is caused by delay power up of ABVREF, CDVREF, which are both from V3P3.
At 25C, ABVREF, CDVREF powered up at the same time with 24V at VM.
At -5C, ABVREF, CDVREF powered up 30 seconds later than 24V at VM. Which caused the stepper motor not rotating at beginning.
Schematic is as below:
Why V3P3 will delay such a long time at -5 degree C?
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RE: DRV8301: Motor drive not working
Hello Alain,
This sounds like it could be a software issue. I've assigned our C2000 team to your post.
This sounds like it could be a software issue. I've assigned our C2000 team to your post.
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DRV8301: Motor drive not working
Part Number: DRV8301
Dear TI,
I am currently working on a project using the drv8301 REVB together with the boostXL F28069M
The instaspin motion gui used with the default (?) appProgram.out lets met identify the motor, but does give the red flag "hardware not identified"
when using the lab2 .out file it doesnt populate the ID settings and doesnt let me identify the motor.
The biggest issue is: In neighter both of the used options i seem te get the motor to spin at all?
i see no current drain from my power supply other than a default 30-40mA when starting the gui and connecting tot the xds100.
any inisght on what i am doing wrong? isnt the REVB board compatible or something?
Greetings,
Alain
edit: i'm not sure on compatibility now. Does lab2c work with the Motion GUI and the revB board and the F28069M? or does lab2c work with the FOC gui and my boards?
i'm getting a bit confused now.
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RE: DRV8323R: 6-step commution with 6x PWM Mode
a firmware is implemeted well according to communication table.
The problem is the gate signal when INLx and INHx signal is low.
Both gate signal(GHx, GLx) should be low, but GHx is high in 6xPWM mode.
This is unnatural.
thank you.
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WEBENCH® Tools/DRV8307EVM: DRV8307EVM didn't work when using motor with 3 single hall wires
Part Number: DRV8307EVM
Tool/software: WEBENCH® Design Tools
I have a motor with 3 hall sensor wires (single end). I connected all wires to DRV8307EVM board that following User's Guide step by step setup, but the motor didn't work normally when power turned on. The red LED is slowly flash always. The motor is overheat after turn on about 4 minutes. The motor stop run after rotated few seconds, then The motor run after stop few seconds. The motor is the work that is going on and off with red LED slow flashing. Could you tell me how to fix the issue?
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RE: DRV2510Q1EVM: Powering the board
Hi Naser,
What specifically is not happening? Do you have more details?
Is customer providing 4.5V and the device is not powering up? What voltage do they need to supply in order to let the device to power up?
Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators
What specifically is not happening? Do you have more details?
Is customer providing 4.5V and the device is not powering up? What voltage do they need to supply in order to let the device to power up?
Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators
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RE: DRV8872: DRV8872 Load issue
IN1=5V,IN2=0V,OUT1=5V,OUT2=0V,it can't load by electronic load,but can load by relay and resistor.
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RE: DRV8872: DRV8872 Load issue
If I connect Electronic load ,the upper bridge is directly to low bridge.It can't load any current.
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DRV8884: Current adjust using a PWM signal
Part Number: DRV8884
Hello,
Our customer try to control the full scale current using a PWM signal with the circuit of the Figure 16 on the datasheet.
They want to control the full scale current from 0.05A to 1A.
They calculate the maximum current as follows.
I_max : ARREF / (RREF+ (R1//R2) ) at 0% duty
How should the customer calculate the minimum current at 100% duty?
Best Regards,
Naoki Aoyama
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BOOSTXL-DRV8301: high speed rotation 33,000rpm
Part Number: BOOSTXL-DRV8301
Dear all,
Can this EVM kit (BOOSTXL-DRV8301+LAUNCHXL-F28207F) control motor as 33,000rpm?
>motor: 4 pole and 3 phase BLDC
>Voltage: 10~14V, Current: 5A
>control: sinusoidal drive
And, there are other valiations to choose 'BOOSTXL-DRV8305EVM+LAUNCHXL-F28207F' or 'DRV8305-Q1EVM'.
Can these boards control 33,000rpm?
Could you teach which is the best board ? and what is concerns to drive faster?
Best regards,
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Stepper Motor Driver
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BOOSTXL-DRV8305EVM: The motor does not rotate regularly when the SVPWM signal is rotating.
Part Number: BOOSTXL-DRV8305EVM
I switched from BOOSTXL-DRV8301 to BOOSTXL-DRV8305EVM because I need a little more power.
Everything worked fine on the 8301, except for the detail with too few power resources. On the DRV8305EVM I have the problem that the motor is not rotating properly. When I read the signals, it doesn't look very good either.
I am used to such signals from the DRV8301 board:
Now with the DRV8305 it looks like this (same svpwm signals):
I am using the 3-PWM-Signal Configuration. I also tried various configurations in the SPI register. Without success. What may be the problem? I noticed that the motor currents are partly identical, which I do not understand.
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RE: C2000 Series High Voltage Three Phase BLDC Motor Drivers
Please refer to the schematic of HV-Kit in controlSUITE, the kit can support a WYE or DELTA type 3-phase 3-wire ACI/BLDC/PMSM motor. You could implement trapezoidal control ( as you mentioned above) or sinusoidal control for motor drive. The kit should meet your requirement if the rated current and voltage of your motor is less than 10A/230VAC. Actually, there are two examples project using trapezoidal control for BLDC motor, one is using a hall sensor, another is using sensorless based on the BEMF ZCP algorithm.
Q1: 600VDC/8A or 10A DC power supply.
Q2: The kit includes whole motor drive parts except the motor.
Q3: You may order this kit from TI e-Store or a distributor who will inform you the shipping time.
C:\ti\controlSUITE\development_kits\HVMotorCtrl+PfcKit_v2.1\~HVMotorCtrl+PFC-HWdevPkg\HVMotorCtrl+PFCKit-R1.1
C:\ti\controlSUITE\development_kits\HVMotorCtrl+PfcKit_v2.1\HVBLDC_Sensored
C:\ti\controlSUITE\development_kits\HVMotorCtrl+PfcKit_v2.1\HVBLDC_Sensorless
Q1: 600VDC/8A or 10A DC power supply.
Q2: The kit includes whole motor drive parts except the motor.
Q3: You may order this kit from TI e-Store or a distributor who will inform you the shipping time.
C:\ti\controlSUITE\development_kits\HVMotorCtrl+PfcKit_v2.1\~HVMotorCtrl+PFC-HWdevPkg\HVMotorCtrl+PFCKit-R1.1
C:\ti\controlSUITE\development_kits\HVMotorCtrl+PfcKit_v2.1\HVBLDC_Sensored
C:\ti\controlSUITE\development_kits\HVMotorCtrl+PfcKit_v2.1\HVBLDC_Sensorless
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RE: BOOSTXL-DRV8301: high speed rotation 33,000rpm
The drive is really dependent on electrical frequency, not mechanical. For your motor, f = (33k/60)(4 poles/2) = 1100 Hz. InstaSPIN-FOC should be able to control this motor, but it also depends on whether the motor is low inductance. If it is low inductance, I would recommend the F28069M as it has a higher clock frequency. You can try the F28027F as a test and determine if the performance is sufficient.
The operating voltage and current will determine the correct integrated driver. Both DRV830x devices you've listed can support the voltage spec and continuous current spec you've listed, so the choice is yours to make.
Sean
The operating voltage and current will determine the correct integrated driver. Both DRV830x devices you've listed can support the voltage spec and continuous current spec you've listed, so the choice is yours to make.
Sean
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RE: WEBENCH® Tools/DRV8307EVM: DRV8307EVM didn't work when using motor with 3 single hall wires
Murphy,
Are your hall sensors connected in the correct order? Can you probe your oscilloscope to see if your supply rail is stable?
Are your hall sensors connected in the correct order? Can you probe your oscilloscope to see if your supply rail is stable?
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RE: DRV8814: Bulk capacitors
Hello Menahem,
Our DRV8814 Evaluation Module uses 100 uF. This should be sufficient for most applications. It's difficult to give a generic recommendation because bulk capacitor sizing is affected by a variety of things:
• Type of power supply
• Acceptable supply voltage ripple
• Parasitic inductance in the power supply wiring
• Type of motor (brushed DC, brushless DC, stepper)
• Motor start-up current
• Motor braking method
You may be able to use a smaller bulk capacitor in your application. I recommend testing different values on a prototype board and choosing a value sufficient to supply the required current without the DRV8814 supply rail collapsing or having large ripple.
Our DRV8814 Evaluation Module uses 100 uF. This should be sufficient for most applications. It's difficult to give a generic recommendation because bulk capacitor sizing is affected by a variety of things:
• Type of power supply
• Acceptable supply voltage ripple
• Parasitic inductance in the power supply wiring
• Type of motor (brushed DC, brushless DC, stepper)
• Motor start-up current
• Motor braking method
You may be able to use a smaller bulk capacitor in your application. I recommend testing different values on a prototype board and choosing a value sufficient to supply the required current without the DRV8814 supply rail collapsing or having large ripple.
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DRV8814: Bulk capacitors
Part Number: DRV8814
Hi,
I could not determine what value of bulk capacitors should I use.
I am going to use the Mabuchi RS-385PH-10280 motor.
TNX
M. Hooper
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