The traction motor is the heart of a new-energy vehicle, and it is also one of the strongest competitive positions of China's supply chain globally. Over the past three years, as a supplier of servo-motor stator automation lines and fully automatic winding equipment, we have felt first-hand how quickly customers downstream are pushing up their requirements for winding precision, consistency, and mass-production efficiency. This article lays out our view of this transformation along three dimensions—market drivers, technology iteration, and rising equipment requirements—and explains how XINGTE is responding.
1. Market drivers: NEV penetration and motor demand
According to publicly disclosed figures from the China Association of Automobile Manufacturers (CAAM), China's new-energy vehicle sales exceeded 12 million units in 2024, with the new-car penetration rate approaching 50%; electrification is also accelerating in major global markets. Every NEV requires one traction motor, which means annual traction-motor demand is growing at the order of millions of units. But the volume growth is only the surface; the deeper change is structural: customers are tightening their demands on range, acceleration, NVH, and cost at the same time, pushing motors from 'good enough' toward the parallel goals of high performance, high reliability, and low cost.
For equipment suppliers, this means the winding process can no longer be treated as a 'downstream add-on'; it must be involved from the design stage itself—wire layout, slot fill factor, and winding consistency directly determine motor efficiency, thermal rise, and noise. Whoever can widen the process window and stabilize consistency with their winding equipment will win orders in the next capacity race.
2. Technology iteration: the triple shift of 800V, hairpin winding, and oil cooling
We see three parallel technology tracks moving forward in traction motors.
First, 800V high-voltage platforms are spreading quickly. Since 2023, leading EV start-ups and established OEMs have launched 800V-platform models, with ultra-fast charging as a selling point. 800V raises the bar for motor insulation, winding voltage withstand, and creepage distances, and the process difficulty of end-turn forming and insulation treatment rises accordingly.
Second, hairpin (flat-wire) windings are gradually replacing round wire. Thanks to higher slot fill, lower copper loss, and better heat dissipation, flat-wire schemes (hair-pin, I-pin, and related forms) are becoming the mainstream route for passenger-vehicle traction motors. The forming precision, transposition consistency, and weld quality of flat-wire windings directly affect motor performance, imposing far higher requirements on winding and forming equipment than round wire ever did.
Third, the penetration of oil-cooled motors is rising. Direct oil cooling sprays coolant onto the winding ends, significantly improving thermal efficiency, but it is also more demanding on end-turn regularity, oil resistance of wire insulation, and winding structural consistency—uneven ends, nicked insulation, and poor consistency will all be amplified under long-term oil cooling.
Layered together, these three tracks turn winding from 'ordinary machining' into 'the critical process that determines motor performance.'
3. Upgrading equipment requirements: precision, consistency, efficiency
Facing this transformation, we see customers' demands on winding equipment concentrated in three dimensions.
On precision, winding accuracy at the 0.01 mm level is becoming the standard for high-end stator lines. Springback of formed flat wire, transposition positions of conductors inside slots, and end-twist angles all require servo control and closed-loop on-line measurement. XINGTE's core technology—0.01 mm ultra-high-precision winding and multi-axis motion control—is built precisely for this kind of demand.
On consistency, the precision of a single machine is no longer enough; customers want 'the ten-thousandth stator to look identical to the first.' This requires parameter self-learning, SPC data collection, and on-line measurement of critical dimensions. Our servo-motor stator automation line links winding, forming, and inspection, so the key parameters of every stator are traceable.
On efficiency, mixed-model lines, fast changeover, and 24-hour stable operation have become hard requirements. An OEM may switch between more than a dozen motor models in a single year; if a line changeover still takes 'days,' capacity simply cannot be released. Fully automatic needle inner-winding machines and four-station stator winding machines are designed precisely for high-mix, low-volume mass production.
4. Our outlook and how XINGTE is responding
Our judgment for the next three to five years is this: traction-motor winding will keep evolving toward higher slot fill, better consistency, and lower unit cost; 800V and oil cooling will further raise the bar for end-turn and insulation processes; flat-wire schemes will become mainstream in passenger vehicles, while round-wire solutions will remain for a long time in commercial vehicles and cost-sensitive markets.
XINGTE's response rests on three things. First, deepen 0.01 mm winding precision and multi-axis motion control, serving both flat-wire forming and high-precision round-wire markets. Second, extend single-machine capability into full-line capability—the longest fully automatic line we have delivered has seventy-eight stations, and servo-motor stator automation lines, fully automatic needle inner-winding machines, and four-station stator winding machines can be flexibly combined to match each customer's process. Third, turn process data into equipment capability, so every machine that leaves our factory carries the customer's process know-how with it.
Electrification of NEVs will not slow down. As the 'heart process' of the motor, winding will only see higher equipment barriers. XINGTE stands ready to work with motor makers to get this process right.
Note: NEV sales and penetration figures in this article are quoted from public CAAM disclosures; judgments on 800V platforms, flat-wire windings, and oil cooling are compiled from XINGTE's exchanges with downstream customers and public industry reports. Specific technology-route choices should be validated against each customer's actual process.
