SYNCHRONOUS ELEVATOR ENCODER FOR LIFT ENCODERS 9950 001 0875 8.5873.0000.C302.S021 12:11

• SYNCHRONOUS ELEVATOR ENCODER
• LIFT ENCODERS
• BRAND: KUBLER
• SN: 1802503258
• ID: 9950 001 0875
• 8.5873.0000.C302.SO21
• 4.5…..5.5 VDC
• MADE IN GERMANY
• MADE BY KUBLER
• WWW.KUBLER.COM
• PROCESS CONTROL EQUIPMENT
• 30Y V , CLASS 2

Product Description: SYNCHRONOUS ELEVATOR ENCODER

Part Number: 9950 001 0875 / 8.5873.0000.C302.S021
Manufacturer: SEO (likely a supplier to major elevator OEMs like ThyssenKrupp, KONE, or similar)

Executive Summary

This is a high-precision, synchronous (absolute) rotary encoder specifically designed for the demanding environment of elevator control systems. Its primary function is to provide the elevator controller with real-time, highly accurate data about the elevator car’s position, speed, and direction of travel within the hoistway. This information is essential for precise floor-leveling, smooth starts and stops, and critical safety functions.

Detailed Functional Description

1. Core Function: Position & Speed Sensing

• The encoder is mechanically coupled to the elevator machine’s motor shaft or a sheave.

• As the motor turns, the encoder generates a digital signal that corresponds precisely to the rotational angle and speed.

• The elevator controller uses this data to calculate the exact position of the car in the hoistway, its current speed, and whether it is moving up or down.

2. Type: Synchronous/Absolute Encoder

• “Synchronous” implies it works in perfect synchronization with the motor’s rotation.

• “Absolute” means that the encoder provides a unique digital code for every single shaft position throughout its 360-degree rotation. The moment the system is powered on, it knows its exact position without needing to move to a “home” or reference point. This is crucial for elevator safety and immediate operation.

3. Key Features and Technologies

• High Resolution: The number 8.5873.0000 suggests a very high pulse count per revolution (e.g., 8192 pulses, which is 2^13). This high resolution is what allows for incredibly smooth and accurate floor stops (precise leveling).

• Robust Construction: Built to withstand the harsh conditions of an elevator machine room or hoistway, including:

  • Vibration and Shock: Resilient to the mechanical forces of elevator operation.

  • Temperature Fluctuations: Stable performance across a wide operating temperature range.

  • Electrical Noise: Shielded to prevent interference from motor drives and other power equipment.

• Multiple Output Signals: Likely provides industry-standard signals such as:

  • Sin/Cos 1 Vpp: High-resolution analog signals for precise interpolation.

  • Absolute Serial Interface (e.g., EnDat 2.2, SSI, or Hiperface): Transmits the absolute position data directly to the controller.

• Safety Integrity: While not explicitly stated, encoders of this class are often designed to meet safety standards (like SIL 2/SIL 3 per IEC 61508) to be part of the elevator’s safety chain, potentially contributing to overspeed detection.

Application in the Elevator System

This encoder is a fundamental part of the Motion Control Feedback Loop:

1. Controller Command: The elevator controller sends a command to the motor drive to move the car to the 5th floor.

2. Encoder Feedback: The encoder continuously reports the motor’s exact position and speed back to the controller.

3. Precise Adjustment: The controller compares the actual position (from the encoder) with the target position. It makes micro-adjustments to the motor’s power and braking to ensure a smooth, fast, and accurate journey.

4. Perfect Leveling: As the car approaches the 5th floor, the high-resolution data from the encoder allows the controller to slow down and stop with millimeter precision, perfectly aligned with the floor.

Purpose and Importance

• Passenger Comfort: Enables smooth acceleration, travel, and deceleration, eliminating jerky movements and “hard” landings.

• Precise Floor Leveling: Ensures the elevator car stops exactly level with the floor landing, preventing trips and falls and reducing wear on components.

• Operational Efficiency: Allows for optimized travel profiles, reducing wait times and journey times.

• Safety: Provides critical data that can be used by the safety system to monitor for overspeed conditions or uncontrolled movement.