Electric slip ring DHK160-3-90A

industrial

Product Overview
High-performance aviation current collector DHK160-3-90A is a high-precision 3-circuit electrical slip ring assembly designed for demanding aerospace and industrial applications. Each path handles 90A at 28VDC, with a design-assured maximum speed of 2400 r/min. Built for intermittent duty cycles (100s on/11s off), it features exceptional runout tolerance (≤0.1mm), ultra-low static unbalance (0.01N·m), and robust 2500VAC insulation.

Key Applications

• Aviation & Marine Propulsion Systems: Designed for left-hand rotation, ideal for integration behind propellers or in rotary joints requiring high-current transfer under significant vibration and runout.
• High-Precision Rotary Platforms: Ultra-low runout and static unbalance make it perfect for radar bases, electro-optical turrets, and automated test equipment.
• Heavy-Duty Industrial Automation: Reliable intermittent duty cycle suits applications like welding rotators, large indexing tables, and heavy machinery where high-current power transmission is critical during rotation. Built to rigorous standards for reliable performance under pressure.

Main Technical Parameters

• Number of Channels: 3
• Rated Current: 90A per channel (28VDC)
• Operating Voltage: 0~28VDC
• Brush Spring Pressure: 3N (±30%) at 25mm extension; 5N (±30%) at 3.5mm extension
• Brush Height: Total length ≥25mm; after assembly, brush extends ≥3.5mm from brush box
• Operating Conditions:
  • After installation behind propeller, copper ring end face runout ≤0.1mm; current collector operates normally with copper ring runout ≤0.2mm
  • Brush replacement indicator line signals need for replacement
  • Assembly must be within design dimensional limits and free from burns, scratches, grooves, etc.
• Rotation Direction: Left-hand (counterclockwise along flight direction)
• Rated Speed (Design Guarantee): 2000 r/min
• Maximum Speed (Design Guarantee): 2400 r/min
• Overspeed (Design Guarantee): Withstands (2550/60) r/min for 30 minutes (non-operating, no mechanical damage or deformation, without brush box)
• Operating Mode: Intermittent, max ON 100s, min OFF 11s
• Weight Requirements:
  • Slip ring assembly: ≤1100g
  • Auxiliary box assembly: ≤205g per unit
• Insulation Resistance (Ring-to-Ring, Ring-to-Brush):
  • Cold state: ≥20MΩ
  • After damp heat test: ≥5MΩ (qualification test only)
• Dielectric Strength (Ring-to-Ring, Ring-to-Brush):
  • Cold state: ≥500VAC@50Hz, 60s, no breakdown or flashover
  • After damp heat test: ≥375VAC@50Hz, 60s, no breakdown or flashover
• Static Unbalance: 0.01N·m
• Product Spare Parts: One additional brush box assembly per set
• Operating Environmental Conditions (Design Guarantee):
  • Flight altitude: 0~10000m
  • Maximum flight speed: 431km/h
  • Maximum dive speed: 450km/h
  • Wind speed limit (crosswind): 15m/s
  • Operating temperature: -55°C to +55°C
  • Storage temperature: -55°C to +70°C

Technical Specifications

• 3-circuit slip ring, each 90A @ 28VDC
• Max speed: 2400 r/min
• Runout tolerance: ≤0.1mm
• Static unbalance: 0.01N·m
• Insulation: 2500VAC
• Weight: ≤1100g (assembly), ≤205g (auxiliary box)
• Operating temperature: -55°C to +55°C
• Storage temperature: -55°C to +70°C