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Kollmorgen 620-AS-FAN
Product Overview:
The Kollmorgen 620-AS-FAN is a DC axial cooling fan specifically designed for forced-air cooling of Kollmorgen AKD series servo drives. It mounts directly onto the top or bottom of the AKD drive chassis to provide additional airflow beyond natural convection, enabling the drive to operate at full rated current in enclosed or high-ambient-temperature installations where natural convection alone is insufficient.
Detailed content
Technical Specifications:
| Parameter | Value |
|---|---|
| Fan Type | DC Axial Fan |
| Dimensions | 60 mm × 60 mm × 15 mm (L × W × H) |
| Rated Voltage | 24 VDC |
| Operating Voltage Range | 18 VDC to 30 VDC |
| Rated Current | 0.08 A (max 0.12 A) |
| Power Consumption | 1.92 W (max 2.88 W) |
| Airflow | 1.2 CFM (0.57 m³/h) at rated voltage |
| Static Pressure | 1.5 mmH₂O (14.7 Pa) |
| Noise Level | 28 dBA (at 1 meter) |
| Bearing Type | Sleeve bearing (long-life) |
| Operating Temperature | -10°C to +70°C |
| MTBF (Mean Time Between Failures) | 50,000 hours at 40°C |
| Connector Type | 2-pin Molex or equivalent (wire leads) |
| Wire Length | 300 mm (11.8 in) |
| Weight | 18 g (0.04 lb) |
| Mounting Method | Clip-on to AKD drive top/bottom ventilation grille |
| Compatible Drives | All AKD and AKD-P series drives (AKD-B, AKD-P, AKD-M) |
Functional Features:
- Forced-air cooling increases heat dissipation capacity by 40–60% compared to natural convection
- Low noise operation at 28 dBA — suitable for noise-sensitive environments
- Wide voltage tolerance (18–30 VDC) allows powering from drive’s internal 24 VDC bus or external supply
- Clip-on mounting — no tools required for installation or removal
- Long-life sleeve bearing — maintenance-free for the life of the drive
- Dust-resistant design with sealed motor housing
Structural Characteristics:
- Fan Blades: 7-blade PBT (polybutylene terephthalate) impeller for high airflow at low noise
- Housing: UL94 V-0 rated PBT plastic with metal reinforcing ribs
- Motor: Brushed DC motor with neodymium magnet rotor
- Grille: Stainless steel wire mesh on intake side to prevent debris ingress
- Mounting Clips: Spring-loaded plastic clips that snap onto AKD drive ventilation slots
Working Principle:
The fan is powered by 24 VDC, which drives the brushed DC motor to rotate the 7-blade impeller at approximately 5,500 RPM. This creates a directed airflow across the heat sink fins of the AKD drive, significantly increasing the convective heat transfer coefficient from approximately 10 W/m²·K (natural convection) to 25–30 W/m²·K (forced convection). This allows the drive to dissipate its internal IGBT and diode losses more effectively, maintaining junction temperatures below 125°C even at full current in enclosed cabinets.
Advantages:
- Enables full-rated operation in enclosures up to 50°C ambient (vs. 40°C without fan)
- Zero-tool installation — clips on in seconds
- Extremely low power draw — 1.92 W (negligible impact on system power budget)
- Quiet operation — 28 dBA is below typical ambient noise in industrial environments
- Universal compatibility with all AKD series drives
Applicable Industries:
- Any application using AKD drives in enclosed cabinets or high-ambient environments
- Packaging machines in warm production facilities
- Outdoor or semi-outdoor automation equipment
- Food processing equipment (high ambient from ovens/steam)
- Textile mills (high ambient from machinery heat)
Installation Requirements:
- Clip fan onto top or bottom ventilation grille of AKD drive — align clips with drive slots
- Connect 24 VDC power to fan leads — can be wired from drive’s internal 24 VDC bus (pin 1 and 2 on I/O terminal) or from external 24 VDC supply
- Ensure airflow path is unobstructed — intake and exhaust must have clear path to cabinet interior/exterior
- Do not block the drive’s I/O terminal area when mounting fan on top
- Verify fan rotation direction — airflow must be directed across heat sink fins (away from drive body)
Usage Precautions:
- Do not operate fan above 30 VDC — motor winding damage will occur
- Do not block airflow intake or exhaust — this will cause drive overheating and fault
- Replace fan if noise increases significantly — bearing wear indicates end of life
- Do not mount fan on a drive that is already at full natural convection capacity in <40°C ambient — unnecessary wear on fan bearings
- Inspect fan blades quarterly in dusty environments — clean with compressed air if blocked
- Do not reverse polarity — fan will not start and may damage internal circuitry
