Electronics > Projects, Designs, and Technical Stuff
BLDC chip recomendation
spinnaker:
I was wondering if anyone could recommend a fairly easy to use BLDC chip? I developed this project using a cheap eBay BLDC controller
but the controller is awfully flaky and I would like to roll my own.
My requirements are:
* Fairly easy to use.
* Does not require a MCU
* Sensorless / BEMF controlled
* Ability to adjust speed via a pot
* On chip mosfets
* Works with a 3 phase hard drive motor
* Comes in a DIP package
I have looked at The DRV10983 which has the internal mosfets but looks like it requires a mcu. The chip has an analog mode where a pot can be used to adjust speed. But looks like it needs IC2 to set that feature. Unless it is on by default?
Big plus if I can detect the position of the motor. Something that can be feed to a mcu external interrupt or CCP pin.
FYI -The mcu PCB portion of this project is already designed and built without being able to communicate to the BLDC to any great extent. So really all I am looking at doing is replace that cheap BLDC controller I purchased. It is on a separate board.
spinnaker:
Bumping thread. Any chip that fits the bill?
Can someone please have a look at the DRV10983 datasheet and tell me if a CPU is not really required? I am not great at reading datasheets. It seems to be a bit sparse to me.
Datashheet does says:
The SPEED input pin can be configured to operate as an analog input(SpdCtrlMd= 0).When configured for analog mode,the voltage range on the SPEED pin can be varied from 0 to V3P3. IfSPEED> VANA_FS, the speed command is maximum. If VANA_ZSā¤SPEED< VANA_FS the speed command changes linearly accordingto the magnitude of the voltage applied at the SPEED pin. If SPEED< VANA_ZS the speed command is to stop the motor.
But it does not say if that is the default mode. Analog is mode 0 which I assume is default but I don't see where it says that.
oPossum:
You have to program the EEPROM with the motor parameters during manufacturing. A MCU on the motor controller PCB is not required.
spinnaker:
A lttile confused by that statement. When yu as "you" I assume you mean in the general you? I.E. the manufacturer?
oPossum:
You the user of the chip. When you manufacture your product you have to program the DRV10983 for the specific motor used.
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