# Tag Info

### Understanding the units of columns in MaFaulDa Dataset

Thank Ronny Landsverk for helping! I built a python code based on your instructions. It worked fine for my project. ...

### How do I match a VFD to an AC motor?

Things are not equal if you already have the motor. You need to know your motor rated voltage. The two 1HP VFD have the same power but the 120V one handles double the current because it needs to in ...
• 3,230
1 vote

### "No Load Speed" for Series DC Motor - What does it mean?

The no-load current is not zero at the no-load speed because it takes power to stir up the air inside the motor housing and to spin the bearings against friction. The no-load current times the source ...
• 12.1k
1 vote

### System identification of a simple motor with only position measurements

Another approach that has not been mentioned here, but which is applicable also to nonlinear systems, is to use a gradient-based optimization scheme over a simulation. Say that you simulate the (...
1 vote

### "No Load Speed" for Series DC Motor - What does it mean?

Load in this context means the resistance to turning. In other words when the motor is only turning its own shaft with nothing connected to it. The max speed is about the shaft and bearings, which ...
• 5,666
1 vote
Accepted

### Understanding the units of columns in MaFaulDa Dataset

The data is TTL data, i.e. they are pulses of either 5V or 0V. The figure shows the first 20,000 rows of column-1 from one of the CSV files in the database. To find the rotational speed, you can ...

### how much power is needed to move a linear axis

For linear acceleration of a mass, the power required will depend on how quickly you want to accelerate it. This is because the Kinetic Energy formula is $E_k = \frac{1}{2} m v^2$. Note the v squared. ...
• 495
Accepted

### Connecting a brushed direct drive motor to a wheel with no holes in the hub

Assuming I'm understanding your solution correctly that sounds decent, and it may be necessary if the wheelchair motors don't have bearings large enough to take the full load of the wheel. You will ...
• 1,553
Accepted

### Torque Problems vs Motor Problem?

The motors have a rated speed of 2750rpm. It doesn't look like there's much of a gear ratio, so at the moment the motors spin at the same speed as the wheels. With 16" wheels, 2750rpm is about ...
• 156
1 vote

### Torque Problems vs Motor Problem?

I would swap the gears between the motor and the shaft, as it looks like you are trying to drive the axle shaft faster than the motor. If you have a small gear on the motor and a larger (*3 or *4) ...
• 13.9k