Generators

  • 4 Pole Synchronous
  • Hydroelectric
  • Low & Medium Speed Synchronous

Four-Pole Synchronous Generator /
Turbine Generator

                                                                                                                            Click here for download

Our 4-pole generators, often referred to in the industry as turbine generators are used in applications where a high speed turbine (gas, steam, expander) drives the generator, typically through a speed reducing gearbox. The rotating speed delivered to the 4-pole generator needs to be 1500 RPM (50 hertz) or 1800 RPM (60 hertz).

Uses and Markets

  • Oil and Gas
  • Industrial Power Generation
  • Cogeneration
  • Geothermal

HIEC’s 4-pole Synchronous Generator Output Range

  • 2,500 to 15,000 kW
    (Laminated Rotor Construction)
  • 9,000 kW to 40,000 kW
    (Solid Forged Rotor Construction)
  • 400 to 15,000 Volts
  • 50 or 60 Hz, 1500 or 1800 RPM

Mechanical Features

Hyundai Ideal Electric Co.’s four-pole synchronous generators are designed with rugged and conservative construction methods that greatly enhance reliability and service life.

Rotor Construction

Hyundai Ideal Electric Co.’s four-pole design uses integral pole laminations, bolted and riveted together under high pressure before shrunk-fit and keyed to the shaft. This integral design is a far superior design as it eliminates the need to separately attach field poles or pole tips. The field coils are tension wound using insulated rectangular copper wire. Aluminum supports are spaced to secure the field coils under all operating conditions.

For our larger four-pole generators, a solid forged salient pole rotor construction is employed. This rotor design, which is stiffer and more mechanically stable than the smaller laminated style, allows us to build generators with output ratings up to 40 MW. Strap field coils are utilized with this rotor design.

The completed rotor assembly is dynamically balanced to our own standards, which are more stringent than most U.S. and international standards.

Bearings

HIEC’s four-pole generators incorporate oil lubricated split-sleeve journal bearings. All bearings are designed for flood / pressure lubrication or self-lubrication, most are furnished with oil rings to provide bearing lubrication during emergency shut-down.

Enclosures

All enclosure types (ODP, WPII, TEWAC, TEAAC, etc.) are available with the 4-pole synchronous generator.

Electrical Features

Our custom engineered design philosophy allows us to meet any unique or specified machine performance requirement (optimizing generator efficiency, designing for special reactances, or minimizing waveform deviation and voltage harmonics).

Sealed Insulation System

HIEC’s standard insulation system includes Class F vacuum-pressure impregnation epoxy resin. The system passes immersion and spray tests per NEMA 1-20.49.  Corona protection is provided as standard for stators above 6000 Volts.

Excitation

Brushless excitation is by far the most popular choice for synchronous generators. It combines lower cost with performance suitable for nearly all applications, and eliminates the problems of brush wear and maintenance. Brush-type excitation is available if required.

Hyundai-Ideal Electric Co.’s brushless exciter design combines a high-frequency three-phase output with full wave rectification, which assures minimum ripple current and faster response. The rectifiers are mounted on a copper heat sink. Redundant fused rectifiers can be furnished for critical applications.

A permanent magnet pilot exciter is typically furnished as an integral part of the exciter for use as a power supply to the voltage regulator. Using a permanent magnet pilot exciter in place of a power transformer provides the advantages of black start capability and forcing current under short circuit conditions.

Voltage Regulators

HIEC offers a state-of-the-art digital electronic voltage regulator system as part of our brushless excitation package. Features such as VAR/Power Factor control, excitation limiting and motor operated controls are also available.

Industry Standards

HIEC manufactures generators to meet all current industry standards, including IEEE, ANSI, NEMA, API and IEC. Special certification is available through CSA, ABS, DNV, Lloyds and others upon specification.
HIEC routinely designs motors for hazardous operation in Division 2 / Zone 2 environments with CENELEC / ATEX certification available.

For More Information

For more information on synchronous generators, or any other HIEC product, contact Hyundai Ideal Electric Co. headquarters or your local HIEC representative.

Hydroelectric Generators

                 

                                                                                         Click here for download

Benefits

Experience

Hyundai Ideal Electric Co. leads the U.S. in small to medium size hydroelectric experience with over 200 projects and 800 MW installed.

Single Source

HIEC is the only company capable of producing both generators and switchgear in the U.S. This allows for sole sourcing of a coordinated electrical package.

Customized

Each generator is custom designed so that performance is optimized and customer requirements can be incorporated.

Flexibility

Hyundai Ideal Electric Co. designs and manufactures both synchronous and induction generators, in horizontal or vertical arrangements.

Site Specific

All units are designed and built with your powerhouse requirements

Customer requirements

HIEC works hand-in-hand with the turbine manufacturer to ensure the generator meets all requirements of the turbine speeds and loads

HIEC’s Hydroelectric Generator Range

Synchronous

500 – 30,000 kW
400 – 15,000 Volts
50 or 60 Hertz
150 – 1,200 RPM

Asynchronous

100 – 8,000 kW
380 – 13,800 Volts
50 or 60 Hertz
500 – 1,200 RPM

Mechanical Features

Rotor Construction

Our shafts are forged 1040 or 4140 series steel. Normal extensions are straight, with a keyway for attaching a coupling. Flanged shafts are direct connection and long shaft extensions can be provided if the application requires.

The generator spiders are either laminated sheet steel, fabricated A36 steel, ductile cast iron, or high strength steel plate, depending on turbine operating and overspeed requirements. The spider is keyed and shrunk onto the shaft.

The rotor poles are stamped from 16-gauge sheet steel, stacked and riveted together. They are individually wound under tension. The wire has Dacron-Double-Daglass insulation with epoxy applied between layers. For machines with more than 12 poles, the rotor poles are bolted onto the spider, while those with 12 poles or less use a dovetail design.

For units with high overspeeds, steel pins are used to reinforce each laminated pole. When overspeeds exceed 1,500 RPM, a plate type spider construction with bolted-on pole tips is used.

Enclosures

A variety of enclosures is available for nearly every type of installation. Most generators are open dripproof. Flanges can be provided for ducting intake and exhaust air.

Totally enclosed generators are recommended for use outdoors. Water-to-air heat exchangers are used for cooling, while protection from the external environment is provided by the generator housing.

Bearings

Hyundai Ideal Electric Co. furnishes thrust and guide bearing combinations to fit each specific thrust load, speed and overspeed application, providing higher efficiency and longer bearing life.

Horizontal Bearings

Horizontal generators without applied hydraulic thrust use self-lubricated, split sleeve bearings as standard. On small and high speed machines, the bearings are generally bracket mounted. Large and slow speed generators typically require pillow block bearings mounted on pedestals. Water cooling and pressure lubrication are used when required to accommodate external thrusts and overspeeds. Self-lubricated bearings can be provided upon review of the application.

Vertical Bearings

Tilting pad bearings are specified for vertical generators. A rotating collar is separated from the thrust shoes by an oil film. Water, circulated through coils located in the oil sump pump, provides effective heat dissipation. Because there are non-contacting parts, these bearings have the longest life.
Guide bearings are required to provide proper shaft alignment and carry radial load. Sleeve type thrust bearings are provided with tilting pads to carry all static and hydraulic loads applied by the turbine runner. All of the sleeve bearings we provide are split type, to allow for removal of the bearing without disassembly of the generator.

Electrical Features

Sealed Insulation System

HIEC standard insulation system includes Class F insulation vacuum pressure impregnated epoxy or polyester resins. Both systems pass an immersion and spray test, per NEMA 1-20.49. Corona protection is provided as a standard for stators above 5000 Volts.

Excitation

Brushless or Static Excitation Synchronous generators can be designed for excitation from a shaft mounted brushless exciter or from a static source with brushes.

For generators that operate above 200 RPM, a brushless excitation system is normally provided to ensure minimum ripple in the rectified DC current supplied to the generator field, and to provide faster response times. The AC current is rectified by hermetically sealed diodes, which can be fused and applied in parallel for critical applications. Another advantage to brushless excitation is the elimination of downtime due to brush replacement and clearing of the brush rigging area. Equipment operated below 300 RPM is evaluated to determine which excitation system is best suited for the application.

Voltage Regulators

Hyundai Ideal Electric Co. furnishes a state-of-the-art electronic voltage regulator system as part of our brushless excitation package. Features such as VAR/Power Factor control, excitation limiting and motor operated controls are recommended.

A permanent magnet pilot exciter can be furnished as an integral part of the exciter for use as a power supply to the voltage regulator. This allows a minimum 250% forcing current under short circuit conditions without series boost CT’s.

Testing

Every generator is assembled and tested in accordance with our standard test procedures, which are far more rigorous than the requirements of NEMA MG-1. A complete test, including temperature rise and efficiency in accordance with IEEE procedures, is performed on all new designs or by customer request.

For More Information

For more information on hydroelectric generators, or any other HIEC product, contact Hyundai Ideal Electric Co. headquarters or your local HIEC representative.

Low & Medium Speed Synchronous Generators

Horizontal Brushless Synchronous Generator                       

                                                                                         Click here for download

Hyundai Ideal Electric Co. has been a leading supplier of low and medium speed synchronous generators for diesel engine applications for more than eighty years. Our experience and conservative design philosophy, combined with top quality materials and workmanship, result in a rugged, reliable, high quality generator that is among the best available in the world today

HIEC’s Low & Medium Speed Synchronous Generator
Output Range

  • 1,000 to 14,000 kW
  • 400 to 15,000 Volts
  • 50 or 60 Hz
  • 500 to 1,200 RPM

Mechanical Features

Hyundai Ideal Electric Co. low and medium speed salient pole synchronous generators employ proven construction techniques that greatly enhance reliability and service life.

Rotor Construction

The field pole laminations are high strength steel sheet, and are securely riveted under pressure. The field coils are tension wound directly onto the poles, using insulated rectangular copper wire.

The wound poles are attached to the spider by one of two methods, depending upon speed. Low speed generators utilize a fabricated steel spider with bolted-on poles. Medium speed machines employ a laminated spider and dovetail pole attachment.

Aluminum supports are used to secure the field coils under all conditions of operation and the rotor assembly is shrunk and keyed to the shaft. The completed rotor is dynamically balanced to HIEC standards, which are more stringent than those of most U.S. and international standards.

Bearings

Hyundai Ideal Electric Co. low and medium speed generators incorporate split sleeve journal bearings as our standard design, either end-bracket or pedestal mounted.

All bearings are designed for self-lubrication via oil rings, and conservative bearing load limits and peripheral speeds assure cool operation and long life.

Enclosures

Open dripproof enclosure with top air discharge (suitable for most indoor applications) is the most commonly used enclosure for engine-generator set applications.

Filters can be furnished on self-ventilated generators as conditions dictate, and generators can also be arranged for external forced ventilation through ducting.

For severe environments, totally enclosed generators with air-to-water heat exchangers are available.

Electrical Features

Our custom engineered design philosophy allows us to meet any unique or specified machine performance requirement (optimizing generator efficiency, designing for special reactances, or minimizing waveform deviation and voltage harmonics).

Sealed Insulation System

HIEC’s standard insulation system includes Class F vacuum-pressure impregnation with epoxy resin. The system passes immersion and spray tests per NEMA 1-20.49.
Corona protection is provided as standard for stators above 6000 Volts.

Excitation Systems

Brushless excitation is the most popular choice for synchronous generators. It combines lower cost with performance suitable for nearly all applications, and eliminates the problems of brush wear and maintenance.

HIEC’s brushless exciter design combines a high frequency, three-phase out with full wave rectification, which assures minimum ripple current and faster response. The rectifiers are mounted on a copper heat sink, and redundant fused rectifiers can be furnished for critical applications.

A permanent magnetic pilot exciter can be furnished as an integral part of the exciter, for use as a power supply to the voltage regulator. The use of a permanent magnetic pilot exciter in place of a power transformer allows black start capability and forcing current under short-circuit conditions.

Voltage Regulators

HIEC furnishes a state-of-the-art digital electronic voltage regulator as part of our package. Features such as VAR/Power Factor control, excitation limiting and motor operated control are also available.

Industry Standards

HIEC manufactures generators to meet all current industry standards, including IEEE, ANSI, NEMA, API and IEC. Special certification is available through CSA, ABS, DNV, Lloyds and others upon specification.
HIEC routinely designs motors for hazardous operation in Division 2 / Zone 2 environments with CENELEC / ATEX certification available.

For More Information

For more information on synchronous generators, or any other HIEC product, contact Hyundai Ideal Electric Co. headquarters or your local HIEC representative.