Efficiency modeling reveals traction dynamics and ideal speed ratios in infinite variable planetary transmissions, indicating operational advantages.
• An efficiency model of a ball traction drive in IVP configuration is developed. • Power recirculation effects are consistently incorporated into the traction model. • A feasibility range of ideal speed ratios with no sustainable motion is identified. • Creep reverses its influence on speed ratio depending on power-flow direction. • Single-idler architecture shows higher efficiency than double-idler in IVP mode.
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Cupertino et al. (2026) studied this question.
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