Jackson Tiedmann is a Regional Sales Engineer at Danfoss Drives.
Jackson Tiedmann, regional sales engineer for Danfoss HVAC drives, joins John Sheff, Danfoss’ former director of public and industry affairs, to discuss condition-based monitoring in HVAC applications.
- Condition-based monitoring (CBM) is not something new but it is new to drives; Danfoss is the first manufacturer to incorporate CBM directly into our drives.
- CBM can monitor load envelope motor state or winding (vibration) to analyze the current signature of the motor and detect when there’s a damage at an early stage.
- Motor winding failures usually don’t occur suddenly. They’ll start with a short circuit and then failures will develop over time.
- CBM will provide the customer with a warning in advance of that critical fault occurring. The vibration monitoring can detect motor or balance looseness or misalignment, as well as mechanical resonance.
- CBM also monitors at all speeds, instead of a technician only checking at one speed or one point in time, and monitors both the torque and speed profile of the application.
- It provides two warnings and an alarm: the first warning is that something might not be right and a service technician should investigate. The second indicates that the service technician should investigate immediately. And then finally an alarm, in which case the driver will trip and shut power off to the motor to avoid any additional damage to the equipment.
- It’s about predictive maintenance – saving downtime and technician service calls. When technicians do come, they’ll have information on what to look for.
- There is one sensor needed for the vibration monitoring, a 4 to 20 milli-amp velocity sensor that’s wired to the analog input of the drive and then you mount that directly on the motor base plate.
- In HVAC applications, CBM can identify leakages, a broken impeller or whether there is fouling or sanding.
- By being able to identify problems throughout the HVAC system, on the air side or water side, CBM can keep the system running smoothly with the least possible downtime.
- CBM can be added to any FC102 HVAC drive as long as the drive has Danfoss’ latest generation of control cards. Once a code from Danfoss is obtained, CBM can be programmed.
- The plan is to continually add monitoring points to the HVAC drive. Danfoss wants the drive to be consistently controlling and evaluating what’s happening.
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For more information and additional episodes of the EnVisioneering Exchange podcast, visit https://www.danfoss.com/en-us/about-danfoss/insights-for-tomorrow/envisioneering-exchange/