Automotive Industry
Samyang Metal is a company specializing in the production of SHAFTs, the core components of BLDC motors essential to various industrial fields, based on the highest level of Cold Forging technology. Its main products include automobile parts, and it is developing high-quality parts such as robotics and aviation parts to meet various customer needs.
Products using the cold forging method enable precise processing while maintaining the strength of the material, and offer excellent advantages in weight reduction and enhanced durability. Based on this technology, Samyang Metal continues to supply high-performance parts required in various industrial fields.
Automotive Industry
BEV . FCEV Components
- Electric Compressor shaft
The **shaft** of an electric compressor for electric vehicles (EVs) is a critical component that transmits the motor’s rotational force within the compressor.
Key Functions
- Connection between Motor and Compressor - Directly transmits the rotational force generated by the motor in the electric compressor to drive the compressor.
- High-Speed Rotation - EV electric compressors typically operate at high speeds (30,000 to over 100,000 RPM), so the shaft must have high precision and durability.
- Minimization of Vibration and Noise - Imbalances or misalignments can cause vibration and noise, making precision machining essential.
- Wear and Corrosion Resistance - As the shaft must withstand continuous rotation and pressure, surface hardness is often enhanced or special coatings (e.g., DLC coating) are applied.
- Drive Motor Shaft
The drive motor shaft in an electric vehicle (EV) is a key component that transmits the motor’s rotational force directly to the reduction gear (gearbox) or wheels. As it must endure high power and high-speed rotation, the choice of material, precision machining, and durability are critically important.
Key Functions
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Transmitting Motor Power to the Reduction Gear
Converts the high RPM (over 20,000 RPM) of the electric motor into a suitable speed for the wheels via the gearbox. -
Withstanding High-Speed Rotation and High Torque
Requires high strength and wear resistance to transmit strong forces and speeds simultaneously. -
Minimizing Noise and Vibration
Even minor imbalances or vibrations at high speeds can affect vehicle performance and ride comfort. -
Wear Resistance and Corrosion Protection
Surface treatment is essential to withstand continuous rotation and friction.
- In-Wheel Motor Shaft – Under Development
The shaft in an in-wheel motor is a key component that directly transmits the motor's rotational force to the wheel. Unlike conventional EV drive motor shafts, it requires compact size, lightweight design, and high durability. Integration with the suspension system is also critical.
Key Functions
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Direct Transmission of Motor Power to the Wheel
As in-wheel motors typically have no or minimal reduction gear, precise transmission of rotational force is required even at high speeds. -
Withstanding High Loads and Impacts
Positioned inside the vehicle wheel, the shaft must directly endure road shocks, vibrations, and torque transmission loads. -
Lightweight Design with High Strength
Lightweight design is essential to prevent increased vehicle weight, while high-strength materials ensure durability.
HEV/FHEV Components
- Generator Motor Shaft
The generator motor shaft in hybrid vehicles is a crucial component that transmits rotational force between the internal combustion engine (ICE) and the electric generator motor. This shaft must be designed to withstand high speeds, high torque, and continuous loads, playing a key role in maximizing the efficiency of the generator and motor systems.
Key Functions
- Transmits power generated by the internal combustion engine (ICE) to the electric generator
- Supports regenerative braking by utilizing power recovered through the generator
- Designed to endure high-speed rotation and sudden torque fluctuations
- Minimizes noise and vibration (NVH: Noise, Vibration, Harshness)
ICE Components
Compressor Shaft & Rotor Ass’y
The compressor shaft in internal combustion engine (ICE) vehicles plays a vital role in the air conditioning system. This shaft rotates within the compressor to compress the refrigerant, helping deliver cool air into the vehicle interior.
Key Functions
- Transmission of Rotational Force : Transfers the rotational force generated by the engine to the compressor to compress the refrigerant.
- Refrigerant Circulation : The compressed refrigerant flows through the condenser and evaporator to cool the interior of the vehicle.
- Durability and Stability : Made from high-strength materials to withstand high rotational speeds and loads.
Alternator ROTOR SHAFT
The alternator rotor shaft is a key rotating component inside a vehicle’s alternator, playing a crucial role in converting the engine’s mechanical energy into electrical energy.
Key Functions
- Transmission of Rotational Force : Transfers rotational energy from the engine to the alternator to assist in power generation.
- Magnetic Field Generation : As the rotor spins, it generates a magnetic field, inducing electrical current.
- Durability and Stability : Manufactured from high-strength materials to withstand high rotational speeds and loads.
Starter SHAFT
The starter motor is a critical component used to start a vehicle’s engine. It receives power from the vehicle’s battery to rotate the flywheel or **flexplate**, enabling the engine to begin operating on its own.
Key Functions
- Engine Start Assistance : Uses battery power to initiate engine rotation.
- Flywheel Rotation : The starter motor’s pinion gear engages with the flywheel to transfer rotational force.
- Automatic Disengagement : Once the engine runs normally, the starter motor disengages automatically to prevent overload.
