Caldwell Electric

01/16/2023

Testing this Allen Bradley 800 HP VFD for sale

03/03/2021

Rewind of this beast, a 450 HP 3600 RPM induction motor. Each copper coil group (one pictured on the winder) weighs over 50 lbs!

02/26/2021

Minetek blower awaiting repairs and control redesign sits under the moonlight.

02/14/2021

Stay warm this weekend!

07/01/2020

First test of our rebuild of a WWII era siren used by a local VFD as a tornado siren. Retrofitted with a modern AC Induction motor and VFD variable speed drive.

We completely rebuilt this old tornado siren for a local fire department, retrofitting it with a modern AC Induction motor and variable speed VFD AC motor dr...

10/23/2019

Preparing to solder the leads on this 75 HP motor. 12 leads is always challenging, especially on a larger motor, but allows for a dual voltage wye-delta start.

06/01/2019

We put the Samsara HM11 to the test to see if it could detect bad bearings in an electric motor in time to prevent costly damage. We are happy to report that yes it can. The key to early detection is to watch the frequency spectrum to detect bands of energy that many not show up in simple time domain plots. Samsara's cloud-based software can monitor the frequency band and send alerts when a motor's bearings are nearing failure. See our full report here:
https://www.caldwellmotors.com/pages/job-1510-200-hp-dc

05/18/2019

Caldwell Electric is pleased to announce that it is now an authorized re-seller of Samsara Products. The HM11 (https://www.samsara.com/products/models/hm11) shown below magnetically attaches to any mechanical device and uploads temperature and vibration sensing in 3 axis to the cloud where the data can be viewed in real time anywhere in the world, from smart phone tablet or computer. This provides a cost-effective way to perform preventative maintenance (PM) on electric motors and other assets. Read more on our web page: https://www.caldwellmotors.com/blogs/news/caldwell-electric-is-now-an-authrorized-samsara-reseller.

In our next post, we'll put this to the test on a 200 HP DC motor to see if it can detect a bad bearing before it's too late...stay tuned!

03/26/2019

Caldwell Electric is now an authorized distributor for Lenze AC Tech variable speed VFD inverter drives!

Lenze provides the latest technology in AC motor speed control. The i500 even has a wireless module that allows the motor drive to be controlled from your smart phone, including easy text display of all the parameters.

11/15/2018

Refaced commutator on a 400 HP DC motor. Shiny!

10/18/2018

250 HP Siemens electric motor rewind, ready for connections.