Precision Gear Manufacturing for Electric Vehicles (EV)

Industry Challenges: High-Speed Meshing & Silence

The high-speed characteristics of EV motors make gear-meshing noise easier to amplify. Even minor gear profile errors, inadequate backlash control, or fluctuations in tooth-surface roughness can lead to noticeable NVH issues. At the same time, EVs require higher efficiency, lightweight design, and reliability—making mass-production consistency a critical success factor.

Shyi Chang’s Advantageous Solutions

We serve the EV market as a high-precision helical gear manufacturer and helical internal gear specialist:

• Low noise and low vibration at high speeds
  For high-speed meshing behavior, Shyi Chang strengthens control over gear profile accuracy, tooth-surface quality, and backlash management—helping customers optimize noise curves and smoothness.
• Balanced material & heat-treatment strategies
  We define materials and heat-treatment conditions based on torque and life requirements, balancing tooth-surface strength with distortion control.
• Mass-production consistency and traceability
  Using process control and inspection data, we build replicable mass-production quality and reduce assembly deviation and abnormal-noise risks caused by batch variation.

Technical Highlights: Engineering for the EV Era

• Low-Noise Profile Design: We prioritize gear-profile and tooth-surface modifications to meet the strict NVH requirements of high-speed EV motors.
• Precision Backlash Management: Tight concentricity and backlash control in our helical internal gears improve meshing stability and transmission efficiency.
• Balanced Heat-Treatment: An integrated strategy that balances load capacity with service life, ensuring helical gears withstand instant torque delivery without distortion.
• Mass-Production Consistency: Replicable quality control processes ensure that every batch meets the stringent standards required by the global EV supply chain.

Real-World Applications

• EV motor reduction gearsets
• Gears for electric oil-pump / water-pump modules
• EPS steering components
• Gears driving cooling and circulation systems