There are important differences between a Regenerative and Non-Regenerative DC 590+ drive.
You can find this information, and much more, from the manual. Follow this QuickLink to the 590+ product page on Parker.com and look under the "Product Supprt" tab for Manuals, QuickStarts, Appnotes, etc.
- Normal Stop and Program Stop are only relevant for a “regenerative” controller. See Below.
| Regenerative (4Q) | Non-Regenerative (1Q / 2Q) | |
| Part Number | 590+ (Chassis) or 955+8Rxxxx (DRV) | 591+ (Chassis) or 955+8Nxxxx (DRV) |
| Rotation Direction | Bidirectional | Unidirectional ONLY |
| Motoring/Braking | Motoring + Braking in both directions | Motoring in the forward direction. Braking in the forward direction only with a DC Contactor installed. |
| Stopping Capabilities |
A regenerative drive can be stopped using a Normal Stop (uses STOP TIME to set duration of the stop), a Program Stop, or an Emergency Stop. It can stop faster than a coast stop because reverse current is allowed to flow through the drive. |
A non-regenerative drive can only be stopped at the coast stop rate (whatever friction and loading allows). To dissipate energy faster, a DC Contactor is required. |
|
Dynamic Brake (DC Contactor) |
Requires a Dynamic Brake if excessive regeneration energy is calculated in order to dissipate energy. The manual has threshold values associated with each regenerative drive. |
Required if energy requires dissipation faster than the coast stop rate. |
| Hardware |
Consists of two fully-controlled thyristor bridges and a field bridge with full transient and overload protection. 12 Thyristors for Forward(6) + Reverse(6) Spin. Four on each phase. |
Consists of one fully-controlled thyristor bridge and a field bridge with full transient and overload protection. 6 Thyristors for Forward Spin. Two on each phase. |
Two snippets from the manual on the REGEN ENABLE parameter's functionality between a Regen and Non-Regen Drive. Click for clarity.
A Regen drive will behave just like a Non-Regen Drive with this parameter.
6Jan20 JD