What is a good brushless motor controller IC chip that suits my project. I have two 48v 1000watt brushless dc hub motors(with hall sensors), and I'm powering them with a 48v 10ah lithium Ion battery. I am making a Self balancing scooter (similar to the Segway) so I need the IC chip to be very fast and controlled by an Arduino Uno. It needs to be able to stop the motors, brake, reverse instantaneously, and send separate speed values to each motor so that I can turn. I want to design the brushless motor controller circuit, but first I just need to know a good motor IC chip that will suit my needs before I start the design.
You won't find a "Chip" that does that for you.
There is two ways to make this, use a dedicated controller-chip or code it in software on your Atmel AVR-chip.
Anyhow, both will control a 3-phase H-bridge with big beefy mosfets, which can handle the voltage/current of your setup.
// Per.
You have started a new thread on this subject without having answered my
question in the last one:
"Where are your MOSFET drivers?"
MOSFET bridges / inverters need MOSFET driver chips to drive them. For
3-phase you need either 3 half-H-bridge drivers or one three-phase bridge
driver chip.
These all take 12V supply, provide logic inputs and use bootstrapping to
drive the top MOSFETs (all the MOSFETs in a bridge should be n-channel).
Examples are FAN7388, HIP4086.
Don't even think of any other approach for driving a 1000W bridge. You'll need fast
over-current shutdown too, so some sort of current sensor / comparator
to override the logic inputs.
I think you may have bitten off more than you can chew.
You may want to consider buying an off the shelf controller. Designing and building a circuit of this complexity with no prior motor control design experience is probably not realistic. You may have underestimated the difficulty of this project .
You have started a new thread on this subject without having answered my
question in the last one:"Where are your MOSFET drivers?"
I was under the impression that the mosfets I was using, could handle low level logic because on the datasheet it says the gate operates on 2-4v. But after more research I now know I will need drivers. I have decided to now get a brushless motor IC chip and then get the appropriate drivers and components.
These all take 12V supply, provide logic inputs and use bootstrapping to
drive the top MOSFETs (all the MOSFETs in a bridge should be n-channel).Examples are FAN7388, HIP4086.
Thanks for the advice. Does this mean I can control the drivers straight from an arduino (without using a IC chip), but using 3 drivers and 6 mosfets per motor?
I think you may have bitten off more than you can chew.
You may want to consider buying an off the shelf controller. Designing and building a circuit of this complexity with no prior motor control design experience is probably not realistic. You may have underestimated the difficulty of this project .
Don't need your negative responses, I am up for the challenge and I know more than you think I do.
There is two ways to make this, use a dedicated controller-chip or code it in software on your Atmel AVR-chip.
Do you know of any controller chips that suit my needs. I don't want a pre-built motor controller I have tried 3 different ones from china and there's always restrictions like the reverse button doesn't work unless the motor is completely stopped which wont work for a self-balancing scooter. The American brushless motor controllers are to expensive.
I looked at the datasheets for FAN7388, HIP4086. I like this option the best and I only need one of these driver IC's per motor right? along with the 6 n-channel Mosfets?
Between FAN7388, HIP4086 which one do you think is a better option for a 48v self balancing scooter and can you explain why?
Also what are the differences between these drivers.
HIP4086AB
HIP4086ABZ
HIP4086ABT
HIP4086ABZT
Hmm ... for someone that claims he's "up to the challenge" you certainly have trouble reading a data sheet. 8)
Ordering Information
PART NUMBER
(Notes 1, 3)
PART
MARKING
TEMP RANGE
(°C)
CHARGE
PUMP PACKAGE
PKG.
DWG. #
HIP4086AB HIP4086AB -40 to +125 Yes 24 Ld SOIC M24.3
HIP4086ABZ (Note 2) HIP4086ABZ -40 to +125 Yes 24 Ld SOIC (Pb-free) M24.3
HIP4086APZ (Note 2) HIP4086APZ -40 to +125 Yes 24 Ld PDIP (Pb-free) E24.3
HIP4086AABZ (Note 2) HIP4086AABZ -40 to +125 No 24 Ld SOIC (Pb-free) M24.3
NOTES:
- Add “-T*”, suffix for tape and reel. Please refer to TB347 for details on reel specifications.
- These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. - For Moisture Sensitivity Level (MSL), please see device information page for HIP4086, HIP4086A. For more information on MSL, please see Technical
Landuino:
I looked at the datasheets for FAN7388, HIP4086. I like this option the best and I only need one of these driver IC's per motor right? along with the 6 n-channel Mosfets?Between FAN7388, HIP4086 which one do you think is a better option for a 48v self balancing scooter and can you explain why?
Its your project, you have to decide these things really. They handle different
voltages, different levels of gate drive, come in different packages, have different
deadtimes, and the HIP4086 has a charge pump so can work with no PWM present
(unlike the vast majority of MOSFET drivers).
High power bridges and inverters are fraught with the risk of failure, it takes fractions
of a millisecond to vaporize a MOSFET due to overcurrent, for instance, if shoot-through
happens. This means devices can explode if you get things wrong.
You need to start testing at lower voltages and current limits and use an oscilloscope to
monitor waveforms and check all is well before upping the power levels a step at a time.
With that level of power definitely use fast opto couplers in the logic signal paths to protect
your microcontroller should the MOSFET and driver setup go bang.
If you want an easier life buy a chinese hub motor controller.
FYI,
Wear safety glasses when testing under power. A TO220 device can explode and project a piece of plastic at a velocity that can easily penetrate the eyeball and probably the brain.
If you want an easier life buy a chinese hub motor controller.
Sound advice, Mark! @Landuino, take the advice of people on this forum that have actually designed and built high power H-Bridge circuits. The process is non-trivial and you will want to buy about 4 to 5 times the number of FETs you will be using. You will make charcoal out of MANY before you succeed.