Typical pain points of Kawasaki servo propeller electrical system

Control logic: Outdated relays/analog control, rudder Angle/CPP pitch adjustment accuracy is only ±1° to ±2°, response time ≥3 seconds, which cannot meet the requirements of precise positioning and rapid reversing.

Feedback deficiency: Sensor aging (such as potentiometer rudder Angle sensors), signal drift, no real-time oil pressure/oil temperature/speed monitoring, and delayed fault detection;

Weak linkage: Independent from the main unit, power distribution, and energy efficiency system, unable to control in coordination, resulting in high energy consumption and poor maneuverability.

Low reliability: Aging circuits, oxidation of contacts, and lack of redundant design can easily lead to the steering gear getting stuck and pitch losing control after a fault, posing a threat to navigation safety.

Difficult maintenance: No fault diagnosis function, maintenance relies on manual inspection, long maintenance cycle and high cost at sea.

2. Prerequisites for Transformation (Compliance

Mechanical-hydraulic system inspection: First, inspect the mechanical structure of the rudder paddle, the hydraulic pump station, the servo valve, and the seals to ensure there is no jamming, leakage, or component failure. Electrical modifications need to match the parameters of the hydraulic system (such as rated pressure and flow rate).

Classification society regulations confirm: The renovation plan should be filed in advance with CCS/ABS/LR, etc. The core equipment must have Marine certification, and the Kawasaki original factory interface protocol must be compatible (such as CANopen, NMEA2000).

Working condition requirement review: Engineering vessels need 360° full rotation rapid response (≤2s), ocean-going vessels require high-reliability redundant design, and passenger ships need smooth operation. Based on this, the control accuracy, response time, and redundancy level are determined.

Reuse assessment: Insulation tests should be conducted on reusable sensors, cabinets, and cables (≥5MΩ for control circuits and ≥1MΩ for power circuits). It is recommended to replace the core control unit with digital equipment.

1.Original Kawasaki KST-180ZF-A SRP control panel 1.原装川崎KST-180ZF-A SRP控制面板

2.Original Kawasaki KST-180ZF-B SRP control panel  2.原装川崎KST-180ZF-B SRP控制面板

3.Original Nabtesco control system 3.独创Nabtesco控制系统

4.New PLC control system 4.新型PLC控制系统