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Stator in the foreground with a commercial bus and heavy truck behind it

ALTERNATOR · STATOR

We make stators for alternators.

Made of a laminated core and windings, the stator generates power in the alternator.

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Some staged images may differ from actual products.

AUTOMOTIVE ELECTRICAL COMPONENTS

We manufacture automotive starting and charging components.

AMC carries out winding and forming, joining and assembly, and measurement and inspection in-house.

Technical view representing the winding process
Technical view representing electrical-component assembly
Technical view representing finished-component measurement and inspection
COPPER TO FORM
Winding & Forming

We wind copper material and form it to the required geometry, creating the foundation for electrical performance.

HOW WE WORK

To standard. Steadily. Together.

We hold to agreed standards, keep improving our processes, and work things through with customers and suppliers.

OUR COMPONENTS

Starting and charging system components.

Brush holders, yokes, armatures, and field coils make up the starting system, while stators generate power in the charging system.

ENGINE STARTING SYSTEM

Starter Motor

Converts battery power into rotational force to initiate engine starting.

Brush Holder · Yoke · Armature · Field Coil

VEHICLE CHARGING SYSTEM

Alternator

Converts engine rotation into electricity for battery charging and vehicle electrical systems.

Stator

Products shown 5

Brush holder with a black insulation ring and copper terminals

STARTER MOTOR / 01

Brush Holder

A starter-motor subassembly that supports the brushes and transfers current to the armature.

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Key components
Brush Holder, Brush, Insulation Plate, Spring, Base, Brush Cover
Application
Product range for compact and high-output starters
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Cylindrical yoke and brush-holder assembly

STARTER MOTOR / 02

Yoke & Brush Holder

A starter-motor assembly combining the field coil and brush holder with the yoke.

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Key components
Field Coil Ass’y, Brush Holder Ass’y, Yoke Ass’y
Application
Assembly range for compact and high-output starters
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Armature with shaft, copper winding, and commutator

STARTER MOTOR / 03

Armature

The rotating starter-motor component that converts electrical energy into mechanical rotation.

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Key components
Shaft, Core, Core Side, Coil, Commutator, Ring, Slot Cell
Application
Rotating component for compact and high-output starters
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Field coil with orange insulation

STARTER MOTOR / 04

Field Coil

A coil that creates the magnetic field required to rotate the armature when current flows inside the yoke.

View components and applications
Key components
Rectangular Copper Wire, Insulation Paper, Brush, Connector Ass’y, Insulation Material
Application
Powder-coated and tape-insulated product range
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Stator with laminated core and red winding

ALTERNATOR / 05

Stator

Comprising a laminated core and winding, this component generates electrical power as the alternator rotor turns.

View components and applications
Key components
Core, Slot Cell, Wedge, Enamel Coil, Varnish, Insulation Tube
Application
Winding assembly for alternators
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Browse products horizontally
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OUR CUSTOMERS

Key customers.

AMC’s key customers are Valeo Electrical Systems Korea and BorgWarner.

MAIN CUSTOMER
Official Valeo logo

Valeo Electrical Systems Korea

CUSTOMER
Official BorgWarner logo

BorgWarner

END APPLICATIONS

Used in vehicles and industrial equipment.

AMC components are assembled into starter motors and alternators used in vehicles and industrial equipment.

Manufacturers of example end products

  • Hyundai

    Porter · Mighty · Xcient · Universe

  • Kia

    Bongo · Carnival · Granbird

    Military · K-151 light tactical vehicle

  • Chevrolet

    Trailblazer · Orlando · Captiva

  • Renault Korea

    QM5

    Renault Samsung application history

  • KGM

    Musso · Korando · Rexton

    SsangYong application history

  • Bobcat

    Compact skid-steer loaders

    MELROE applications

  • HD Hyundai

    Hyundai forklifts · Excavators

    Hyundai heavy equipment application history

  • Daedong

    Tractors · Power tillers

  • TYM

    Tongyang tractors · Kukje power tillers

    Tongyang Moolsan / Kukje application history

  • LS Mtron

    LG tractors

    GoldStar / LG tractor application history

Brand and product names identify downstream applications of AMC components, not direct customer relationships or affiliations. Examples include historical applications limited to specific models, model years and specifications.

MOBILITY IN CONTEXT

Used to start buses and trucks and to power them on the road.

The starter motor starts the engine; the alternator supplies power while the vehicle runs.

Unbranded commercial bus traveling on a road in Korea

COMMERCIAL MOBILITY

Starting and power for commercial buses

Commercial buses use both a starter motor and an alternator.

Unbranded heavy commercial truck on a road with green mountains

HEAVY DUTY

Heavy commercial vehicles

They use starting and charging components suited to frequent starts and long operating hours.

Copper winding and dark laminated steel textures in natural light

MATERIAL STUDY

Copper windings and laminated cores

Armatures, field coils and stators are built from copper windings and laminated cores.

Operator in navy workwear and gloves examining a copper-wound armature

HANDS AT WORK

Checking the assembly

Operators check the windings and the assembly themselves.

Illustrative field coil image showing orange insulation and connected windings

THE DETAIL MATTERS

Cores, windings and insulation, assembled into one component.

Each material is processed stage by stage before assembly.

FROM PARTS TO ASSEMBLIES

FROM PARTS TO ASSEMBLIES

Assembly processes by product.

We process coiled copper into flat rectangular conductors to make starting and charging components.

Close-up of copper winding curves and surface texture

COPPER WINDING

Copper winding

An essential element of starter and alternator components, carrying current and generating magnetic fields.

Layered texture along the edge of laminated metal

LAMINATED CORE

Laminated core

Built from stacked thin steel sheets, the core provides a path for magnetic flux and supports the windings.

Copper wire and cream-colored insulation paper textures

INSULATION DETAIL

Insulation

Insulation electrically separates the windings from the metal core to prevent short circuits.

Armature Assembly

The process of joining the core and winding to the rotating shaft.

View process imageClose process image
  1. Core press-fitting
  2. Coil insertion
  3. Commutator press-fitting
  4. Ring insertion & assembly
Four-stage armature process from core press-fitting to ring assembly

Yoke & Brush Holder Assembly

Coils are wound and insulated, then joined with the yoke and brush holder.

View process imageClose process image
  1. Coil winding
  2. Welding & connection
  3. Insulation coating
  4. Yoke assembly
  5. Brush holder fastening
Five-stage process from field-coil winding to yoke and brush-holder assembly

Stator Assembly

Windings are inserted into the laminated core, followed by insulation treatment and inspection.

View process imageClose process image
  1. Core welding
  2. Coil insertion
  3. Coil forming
  4. Impregnation & drying
  5. Tube insertion & inspection
Five-stage stator process adding windings and insulated leads to the core

QUALITY BUILT INTO THE PROCESS

Requirements set the standard; process and inspection check against it.

Product requirements define the working standards. Findings from production and inspection inform the next cycle.

01ALIGN / REQUIREMENT

Specs & conditions → working standards

Defining requirements

Product specifications and application conditions are translated into working standards.

02VERIFY / PROCESS

Process results ↔ requirements

In-process checks

Requirements and results are checked at key winding, forming, joining, and assembly stages.

03IMPROVE / FEEDBACK

Inspection & feedback → next run

Applied to the next run

Findings from inspection and customer feedback inform the next production run and process improvements.

Conceptual 3D view of the quality process

OUR PLACE

From material processing to component production.

Our winding, forming, assembly, and inspection equipment supports the production of automotive electrical components.

Gyeongju, Korea
AMC manufacturing facility with blue roofs and a maintained exterior

MANUFACTURING & INSPECTION

From winding and forming to measurement and inspection.

Explore manufacturing and inspection equipment by process.

WINDING & FORMING

Winding & Forming

  • Coil Winding Machine
  • Coil Inserting Machine
  • Coil Forming Machine
JOINING & ASSEMBLY

Joining & Assembly

  • Spot Welder
  • Ultrasonic Welder
  • Riveting Machine
  • Hydraulic Press
INSULATION & HEAT

Insulation & Heat Treatment

  • Varnish Impregnator
  • Powder Coating Machine
  • Dry Oven
MEASUREMENT & INSPECTION

Measurement & Inspection

  • Surge Tester
  • Hardness Tester
  • Ring / Cylinder Gauge

OUR JOURNEY

History since 1981.

We expanded our production facilities and earned quality certifications as we grew into a maker of starting and charging components.

MANUFACTURING RECORD1981 — PRESENT
  1. 1981–1986FOUNDATION

    Started as Dongjin Metal

    Manufacturing began as Dongjin Metal, with the establishment of a factory laying the foundation for production.

    • 1981Manufacturing begins
    • 1986Gyeongju plant established
  2. 1991–2002SYSTEMIZE

    Incorporation and quality certification

    After incorporation, the company earned ISO 9002 and 100 PPM certifications, built a new office and extended the plant.

    • 1991Corporate registration
    • 1997Quality system certifications
    • 2002Facility expansion
  3. 2004–2008AUTOMOTIVE

    Automotive quality certifications

    SQ-MARK, ISO/TS 16949, and INNO-BIZ certifications, together with production consolidation, expanded automotive manufacturing capability.

    • 2004SQ-MARK
    • 2006ISO/TS 16949
    • 2008Production base consolidated
  4. 2013–PRESENTSPECIALIZE

    Renamed AMC

    The company adopted the AMC name and continues to build expertise in automotive starting and charging components.

    • 2013Company renamed
    • 2014SES-Tier 2
    • PresentStarting & charging component production
AMC facility with a steel sign and production building beyond the main gate

OUR NAME

Motors, as the name says.

AMC stands for Ace-Automotive Motors Corporation. As the name says, we make parts for vehicle starter motors and alternators.

VERIFIED CREDENTIALS

Certifications and evaluations.

Quality certifications and supplier evaluations held by AMC.

  • Current

    ISO 9001:2015 · KS Q ISO 9001:2015

    Quality Management System Certification

    Certification body · Global Systems Register (GSR)
  • Current

    INNO-BIZ

    Technology-Innovative SME

    Ministry of SMEs and Startups
  • Current

    SES-TIER 2

    Supplier Evaluation Standard

    Valeo Electrical Systems Korea
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Contact Information+82-54-776-7000
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28 Yurim-ro 13beon-gil, Gyeongju-si, Gyeongsangbuk-do, Republic of Korea

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