Eaton PowerXL DA1 - Single-Phase AC Motors; Connecting EX Motors; Synchronous, Reluctance, and PM Motors

2 Engineering
2.9 Three-phase motor
58 DA1 Variable Frequency Drives 11/16 MN04020005Z-EN www.eaton.com
2.9.4 Single-phase AC motors
It is not permitted to run DA1 variable frequency drives with single-phase AC
motors (induction motors), single-phase asynchronous motors (capacitor
motors), shaded-pole motors, etc.
2.9.5 Connecting EX motors
The following aspects must be taken into account when connecting
hazardous location motors:
• A DA1 variable frequency drive can be installed in an explosion-proof
enclosure within the hazardous location or in a control panel outside the
hazardous location.
• All applicable industry-specific and country-specific regulations for
hazardous locations (ATEX 100a) must be complied with.
• The specifications and instructions provided by the motor’s
manufacturer with regard to operation with a variable frequency drive –
e.g., whether motor reactors (dV/dt limiting) or sine filters are required –
must be taken into account.
• Temperature monitors in the motor windings (thermistor, Thermo-Click)
must not be connected directly to the variable frequency drive, but
instead must be connected through a relay approved for the hazardous
location (e.g. EMT6).
2.9.6 Synchronous, reluctance, and PM motors
DA1 variable frequency drives can be used to run premium efficiency three-
phase motors, such as:
• IE3 and IE4 efficiency classes –
as defined in IEC/EN 60034-30, EU No. 4/2014
• Permanent magnet motors (PM motor),
• Synchronous reluctance motors (SynRM)
• Brushless DC motors.
These motor technologies have comparable efficiencies at their rated
operating point and identical efficiency classes, but also have significant
differences when it comes to their startup behavior and partial-load
operation.
Moreover, the corresponding nameplate specifications (315 V, R
20*
=2.1,
L* = 20 mH, and U
Pol
= 195 V / 1000 rpm, for example) will deviate
significantly from the usual specifications.
￫
For information on and examples for permanent magnet and
brushless DC motors, please refer to application note
AP040051EN.