TAIYO LX series brushless AC generator

TAIYO LX series brushless AC generator

Product positioning and series division

The TAIYO LX series is a brushless AC generator with a power coverage of 11.5~2250kVA, divided into three major models:

LX-G: Basic type, main stator outputs power to AVR

LX-E: Heavy duty type, with auxiliary winding providing strong excitation

LX-H: High performance type, independently powered by PMG permanent magnet generator, with the strongest ability to resist harmonics and non-linear loads

Core Features

Excellent electrical characteristics

Steady state voltage regulation accuracy: ± 1.0%

Transient pressure drop: ≤ 25%, restored to ± 3% within 2 seconds

Voltage regulation range: rated voltage * * ± 5%**

High reliability and long lifespan

Based on ISO9001/ISO14001 quality system

Brushless excitation, no carbon brush wear, easy maintenance

Compact and lightweight

Optimize electromagnetic and structural design, with small size and light weight

Rich models and high performance

Three level excitation scheme covers different load requirements

Unified 4-pole structure for full power range, compatible with diesel engine drive

Key electrical performance indicators

Project parameters

Steady state voltage regulation rate ± 1.0%

Transient voltage adjustment with sudden 100% load, voltage drop ≤ 25%, restored within 2 seconds

Overspeed tolerance of 120% rated speed, lasting for ≥ 2 minutes

Unbalanced load withstand 20% rated current negative sequence current

No load waveform distortion rate ≤ 10%

Short term short-circuit capability 50Hz: 250%/2s; 60Hz: 300%/2s (excluding LX-G)

Voltage adjustable range rated voltage ± 5%

Comparison of excitation systems

LX‑G

Main stator output → AVR → excitation winding

Applicable: Ordinary resistive/linear loads

LX‑E

Dual power supply of main stator and auxiliary winding → AVR

Applicable: Heavy load, impact load

LX‑H

PMG permanent magnet generator independent power supply → AVR

Applicable: Nonlinear loads such as thyristors and rectifiers, with the most stable voltage

Standard specifications

Project standard value

Cooling method: self ventilated

Protection level IP20 (optional IP21~23)

Insulation level F

Phase number/wire system three-phase, 3-wire/4-wire

Power factor 0.8 lagging

Number of poles: 4 poles

Environmental temperature -5 ℃~+40 ℃

Altitude ≤ 1000m

Ball bearings or roller bearings

Standard IEC

Power Range (Typical)

LX‑G/E：11.5kVA ~ 500kVA

LX‑H：600kVA ~ 2250kVA

Supports dual formats of 50Hz/400V and 60Hz/440V

Divided into two levels: continuous power and backup power

Structural components

The core components include:

Stator/rotor winding and iron core

Rotating rectifier (brushless key)

Excitation armature, excitation magnetic field

Bearings, end caps, fans, junction boxes

LX-H permanent magnet secondary excitation machine with PMG

Optional configurations

Protection level: IP21~IP23

Parallel operation components (AVR synchronization)

Bearing/stator temperature sensor and display

Space heater (anti condensation)

Anti high humidity and anti salt spray coil treatment

Low temperature scheme (-5 ℃~-20 ℃)

Speed generator, double bearing, special coupling

Single phase output configuration (models 46C and below)

Key issues

Question 1: What are the core differences between the LX-G/LX-E/LX-H models? What loads are suitable for each?

answer:

LX-G: Main stator excitation, low cost, suitable for ordinary linear loads.

LX-E: Strong excitation of auxiliary winding, suitable for heavy and impact loads.

LX-H: PMG permanent magnet independent excitation has the strongest anti harmonic ability and is most suitable for nonlinear loads such as thyristors and rectifiers.

Question 2: What are the short-circuit and overspeed capabilities of LX series generators? Why does LX-G not support strong short-circuit capability?

answer:

Overspeed: All models can withstand 120% rated speed for ≥ 2 minutes.

Short circuit: 50Hz=250%/2s; 60Hz=300%/2s (excluding LX-G).

LX-G adopts direct power supply from the main stator without auxiliary strong excitation winding, which cannot maintain high-power short-circuit current.

Question 3: What is the transient voltage index of the LX series? What is the significance for practical use?

answer:

Sudden increase of 100% rated current (power factor ≤ 0.4), maximum voltage drop ≤ 25%, and restore to within * * ± 3% * * of steady-state voltage within 2 seconds.

Meaning: Ensure minimal voltage drop and fast recovery when starting with a large load, protect equipment from tripping or restarting, and improve power supply stability.