Description

High-efficiency and stable core power source for marine power generation

Product Positioning and Core Value: This series of generators is designed specifically for the medium-speed power generation needs of modern marine power systems. It adopts mature and reliable electric excitation technology, combined with optimized structural design and high-quality manufacturing processes, to provide medium-speed power generation solutions for various types of ships with wide power coverage, stable operation, and convenient maintenance.

Detailed Technical Parameter Analysis

1. Model Specification System

Application Classification	Frame size range	Power Coverage	Typical speed	Adapted scenarios
compact	H355-H450	~1500kVA	1000-3000rpm	Auxiliary power stations, small vessels
Standard type	H500-H630	1500-4000kVA	750-1500rpm	Merchant ship main generator, engineering vessel
medium	H710-H900	4000-7000kVA	500-1000rpm	Large cargo ships and oil tankers
Large	H1000及以上	7000-10000kVA	300-750rpm	VLCCs, ultra-large container ships, luxury cruise ships

2. Detailed Explanation of Core Electrical Parameters

Power Characteristics:

Rated Capacity: ~10000kVA (Customizable)

Power Factor: 0.8 (Lag) Standard configuration, optional 0.9-1.0

Overload Capacity: 110% continuous operation, 150% overload for 60 seconds

Efficiency Curve: Maximum efficiency >97%, 75%-100% load efficiency >96%

Voltage System:

Voltage Rating: 220V/380V/440V/ 690V/3300V/6600V/11000V/13800V
Voltage Regulation: ±1% (AVR static accuracy)
Voltage Harmonics: THD < 2.5% (rated load)
Parallel Operation: Average Distribution Accuracy < ± 2.5%
Frequency Characteristics:

Rated Frequency: 50Hz/60Hz selectable
Transient Frequency Adjustment: ≤ ± 10% (sudden full load)
Recovery Time: < 3 seconds (to rated frequency ± 1%)

3. Mechanical Characteristics

Speed ​​and Structure:

Speed ​​Range: 300-3000 rpm (precisely matched to the prime mover)
Pole Configuration: 4-pole, 6-pole, 8-pole, 10-pole optional
Moment of Inertia: Optimized design to meet power grid surge requirements

Bearing System:
Drive End: Cylindrical roller bearings (axially free)
Non-Drive End: Deep groove ball bearings (axially positioned)
Lubrication Method: Grease/oil lubrication optional

Vibration and Noise Control:

Vibration Level: Complies with ISO10816-3 Class A standard
No-load Vibration: <1.8 mm/s (RMS value)
Full-load Vibration: <2.8 mm/s (RMS value)
Noise Level: ≤85 dB(A) @ 1m (depending on frame size)

4. Excitation System Technical Parameters

Excitation Method:

Brushless Excitation System (Standard Configuration)

Main Exciter: Permanent Magnet Auxiliary Exciter
Rotating Rectifier: Three-phase bridge type, IP54 protection
Voltage Setup: 100% rated voltage zero-start-up voltage
Automatic Voltage Regulator (AVR):

Regulation Accuracy: ±0.5% static, ±1% dynamic
Response Time: <0.1 seconds (90% step)
Protection Functions: Over-excitation/under-excitation limit, V/Hz limit
Communication Interface: Modbus RTU/TCP, CANopen
Excitation Characteristics:

Forced Excitation Capacity: 1.6 times rated excitation voltage, lasting 10 seconds
Peak Voltage: 2 times rated excitation voltage (instantaneous)
Demagnetization System: Optional demagnetizing resistor or demagnetizing switch

5. Protection Rating Configurations

IP54 Standard:

Dustproof: Dustproof, prevents harmful dust accumulation
Waterproof: Splash-proof, suitable for dry areas in the upper part of the engine room
Applicable Environment: General engine room, temperature 0-45°C

IP55 Enhanced:

Water Jet Resistance: Unaffected by low-pressure water jets from any direction
Corrosion Protection: Epoxy coating, salt spray resistance >500 hours
Applicable Environment: Lower and middle parts of the engine room, humid environments

IP56 Marine Rating:

High-Pressure Water Jet Resistance: Protection against strong sea waves
Sealing Design: Double sealing structure
Applicable Environment: Lower part of the engine room, harsh sea conditions

6. Installation Method Technical Specifications
B3 Foot Mounting:

Foot Dimensions: Standardized mounting hole layout
Mounting Surface: Flatness <0.1mm/m
Number of Feet: 4-8, depending on frame size
Applicable Power: Full power range
B5 Flange Mounting:

Flange Standard: ISO/SAE standard flange
Face Runout: <0.03mm
Coaxiality: <0.05mm
Applicable Scenarios: Compact spaces, integrated installation

7. Professional Cooling System Configuration

IC81W (Air-Water Cooling):

Cooling Method: Internal air circulation in the motor + external water cooler
Water Cooler: Shell and tube type, stainless steel
Cooling Water Flow Rate: 2-50 m³/h depending on power
Water Temperature Range: Inlet ≤32°C, temperature difference ≤10°C
Advantages:
High cooling efficiency
Clean motor interior
Strong environmental adaptability
Applicable Power: Optimal solution for the entire power range

IC86W (Closed-Loop Circulating Water Cooling):

System Composition: Internal water-cooled windings in the motor + external secondary heat exchange
Primary Cooling: Deionized water + antifreeze
Secondary Cooling: Central cooling water system
Technical Parameters:
Cooling Water Pressure: 0.2-0.5 MPa
Flow Rate Accuracy: ±5% control
Leakage Detection: Automatic alarm
Application Advantages:
Low noise (reduced by 5-8 dB)
Uniform heat dissipation
Suitable for high power density designs
Typical Applications: >3000kVA high-power units

8. Insulation and Temperature Rise Classes

H/F Class Insulation System:

Heat Resistance Class:
Stator Winding: 180°C (H Class)
Rotor Winding: 155°C (F Class)
Temperature Rise Limits:
Stator Winding: 125K (resistance method)
Rotor Winding: 105K (resistance method)
Core: 115K (thermocouple method)
Insulation Materials:
Mica Tape: Withstand Voltage >30kV/mm
Impregnated Varnish: Temperature Index ≥180℃
Slot Insulation: Three-layer Composite Structure

F/B Class Insulation System:

Heat Resistance Class:
Stator Winding: 155°C (F Class)
Rotor Winding: 130°C (B Class)
Temperature Rise Limits:
Stator Winding Rotor winding: 105K
Rotor winding: 85K
Economic advantages:
Manufacturing cost reduced by 8-12%
Suitable for normal operating conditions
Quality control and testing standards
Manufacturing process control
Raw material inspection: 100% traceability of key materials
Winding process:
Coil forming accuracy: ±0.2mm
Inter-turn withstand voltage: 2Un+1000V, 1 minute
Vacuum pressure impregnation (VPI):
Vacuum degree: <100Pa
Pressure: 0.4-0.6MPa
Curing: Staged temperature control
Dynamic balance test:
Accuracy class: G2.5 (ISO1940)
Test speed: 110% of rated speed