Part Number: DRV8701
Hi,
I have tried some many times on two different computers; both Win7 64bit, but the GUI just won't run; nothing happens when I double check on the execution file. Is there anything I should install before running the GUI?
Thank you
regards,
Kevin
Part Number: DRV8818
Hi Team,
I have question about DRV8818. Could you kindly help us to reply question? Thank.
DECAY can direct connect to MCU GPIO to programming mode select by SW control H/L signal. (ex change mix decay mode)
or just by divider resistor fixed one of mode? since FIG show.
Part Number: DRV595
Hi whomever it concerns!
Regarding the FaultZ pin.
In application it is pulled up to 3.3V with 100k
In application I have pulled the SDZ low.
Attached the behaviour of the Faultz pin at 4A on the device.
It is not compltely clear to me how to calculate the pull-up at other supply voltage than the 26V. You refer to 26V in the datasheet.
I expected a distinct on/off when a failure due to overcurrent or to high temperature on the device.
Could you please advice?
Hi Sasha,
Stator winding are similar in both the motors BLDC (synchronous motor) and IM (Asynchronous motor).
In induction motor, rotor always tries to catch rotating magnetic field. Therefore it runs at a speed which is less than the synchronous speed. But in BLDC motor, rotor rotates at synchronous speed.
Yes you can test, open loop V/F control algorithm on BLDC motor. To test this, you start your motor with lower speed and ramp slowly. Motor may not run if you apply higher speed (duty) at starting.
Id itHi Anders,
Thanks for asking question in E2E. For FAULT pin, a pull-up resistor is recommended to limit the slew rate of the voltage which is presented to the pin during power up. Depending on the output impedance of the supply, and the capacitance connected to the power net on the board, slew rates of this node could be high enough to trigger the integrated ESD protection circuitry at high current levels, causing damage to the device. 100kOhm is recommended to be used here. I think you could use a little lower value resistance for a lower level power supply.
About the FAULT pin waveform shown in the picture, is it triggered by over-current protect? Not DC protect or OT protect? If it is OC protect, could you please also capture the output curent waveform on the scope? Could you please let me know the load on the output?
Only a pull-up to 3.3V on FaultZ and then directly to the MCU.
SDZ is driven high and there is a resistor 100k to GND.
Hi-Z is driven low with both 100k pull-up and pull down.
However I noticed that I am running the device at the reserved setting FS2=1, FS1=1 and FS0=1
Could this be a reson for the strange behaviour?
The ripple I see point at FS2=1, FS1=0, FS0=0
I will look at the board more in detail if there is any remaining solder bridges.
When the device is not loaded hard the faultZ average value is higher and the ripple is lower than in previous picture.
Supply voltage only drops from 23.6V down to 23.2V during loading.
When increasing the current to 4.4A the signal average drops, average 92mV with ripple 900mV at 1.2Mhz and signals is locked in this level and output to the load is shut-off.
Is this a reserved mode so that can be used for monitoring the chip temperature?
Rick,
After doing some more digging, we found this...
https://www.pololu.com/product/2135
... in case this question comes up again.
Regards,
Hayden
Part Number: DRV8824
Hello,
Our customer use the DRV8824, ask us How about the dead time control of this device.
I check the datasheet and have a question.
I see the tDEAD. But I cannot understand about the relation between tDEAD,tF and tR.
I check the datasheet of DRV8800, it is very clear spec.
My understanding is below attach file.
[View:/cfs-file/__key/communityserver-discussions-components-files/38/motor_5F00_driver_5F00_DTC.pdf:1230:0]
Is my understanding correct?
Best Regards,
Naoki Aoyama
Part Number: DRV8837
dear all:
My motor can work in the case of 2V, what is the minimum voltage provided by the VM pin of the DRV8837? Thank you
Anything from your side?
Hi,
I am trying to simulate UC2625 motor driver. What is the structure of RC-OSC pin? It sets the PWM frequency with a RC network.
In the application note U-115, when in voltage mode speed control, RC OSC pin is connected to PWM-IN pin. What is the output of this pin? Is it the adjusted PWM, or another value, like oscillator frequency given in datasheet (50kHz) ?
Thanks..