# Tagged Questions

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### choosing the suitable DC motors

I'm working on a 4x4 robot that is supposed to carry stuff total_mass=100kg (including the robot). the robot should have average speed ...
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### 24v brushless DC Driver Pinout

I have some Brushless DC Motors with drivers and I need some help finding the pinout of the drivers. Please take a moment to view the pictures here, clicking on a picture will show its ...
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### Control differences between ac induction motor and brushless dc motor?

I have a fairly solid background in industrial AC motor control (soft starters, VFDs, etc.) but something that I'm certainly NOT well versed in is brushless DC motors... the type found in every hard ...
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### What is this type of motor called?

Firstly some background: I would like to make a magnetic stirrer, like the ones they use in chemistry labs: A small bar magnet sits inside the glass jar, while another bar magnet, attached to a ...
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### Understanding motor constants Kt and Kemf for comparing brushless DC motors

So for a practical definition, the torque constant Kt specifies how many Nm of torque you'll get from the motor at a certain current? Is a bigger Kt always better? I am more confused about the ...
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### What determines the speed of a brushless DC motor

When driving a brushless DC motor, which parameters control the speed. Is it the current in the windings, the voltage, or both? What determines the maximum speed? If you drive the windings with ...
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### Debugging Vds exceeded in motor drive application

I have an existing motor drive circuit that uses an Allegro 4935 to drive a brushless DC motor. The circuit has been working fine. We've decided to change motors, now with some of the motors the ...
According to the definition of a BLDC by Wikipedia: $K_V$ is the motor velocity constant, measured in RPM per Volt (not to be confused with "kV," the abbreviation for "kilovolt")[6]. The ...