Let Sino's Lamination Stacks Empower Your Project!
To speed up your project, you can label Lamination Stacks with details such as tolerance, material, surface finish, whether or not oxidized insulation is required, quantity, and more.
Cold Rolled Motor Laminations Manufacturer
At Sino, we see ourselves as more than just a supplier of cold rolled motor lamination components. We aim to be your partner in innovation. We understand that the heart of your electric motor – the stator and rotor core – is critical to its overall performance, efficiency, and reliability. That’s why we pour our expertise and dedication into every cold rolled motor lamination coil we process and every cold rolled motor lamination sheet we produce.
What's the Big Deal About Cold Rolled?
What’s the big deal about “cold rolled,” and why are these thin slivers of specialized steel so critical? Cooling the rough metal sheets, then meticulously working and pressing them until their structure is refined. Simply put, this is the essence of cold rolling. This process, applied to specialized electrical steel, transforms it, bestowing upon it properties that are a dream come true for motor designers. At Sino, we’ve mastered this art, turning high-grade cold rolled motor lamination coil into impeccably precise cold rolled motor lamination sheet components ready to form the heart of your next motor.
Our Products
This text briefly introduces visitors to your main services.
Precision Engineering: Tighter Tolerances and Smooth Surfaces
Cold rolling allows for incredibly tight control over the thickness of each lamination – we’re talking tolerances measured in mere hundredths of a millimeter. Furthermore, it yields a much smoother, more consistent surface finish compared to hot-rolled alternatives.
A higher stacking factor means more actual steel and less air (or varnish) in a given core volume. Uniform thickness ensures that when the laminations are stacked and compressed, they fit together snugly. This maximizes the amount of magnetically active material, directly contributing to better magnetic performance.
That smooth surface is crucial for the even application and integrity of the thin insulating coating (like C5 or C6 coatings) that each cold rolled motor lamination receives. If the surface is rough, the coating can be uneven or damaged during handling and stacking, creating short circuits between laminations and compromising all those efforts to reduce eddy currents.
A precisely stacked core is more mechanically stable and balanced. This is especially vital in high-speed motors, where even slight imbalances can lead to excessive vibration, noise, premature bearing wear, and, in extreme cases, catastrophic failure.
The Art and Science of the Lamination Stack
1
The Significance of Lamination Joining Methods
The method of joining the laminations – whether it’s through interlocking (creating small, stamped features that lock adjacent laminations together), cleating, welding along the outer diameter, or bonding with adhesives – has a significant impact on the core’s mechanical integrity, dimensional stability, and even its magnetic properties.
2
Sino's Expertise in Precision Stack Assembly
Our automated stacking lines and skilled technicians ensure that each core is built to tight tolerances, maximizing that all-important stacking factor and minimizing any potential for noise, vibration, or performance degradation due to a sub-optimal assembly.
3
The Value of Sino's Assembled Lamination Stacks
When you receive a lamination stack from Sino, you’re getting a component that’s ready to become the reliable heart of your motor. This commitment to quality assembly ensures maximized stacking factor and minimizes potential issues like noise, vibration, or performance degradation, delivering a component optimized for performance and reliability.
The Sino Advantage – A Look at the Numbers
While exact figures depend on the specific grade of steel and processing, here’s a conceptual idea of the improvements cold rolling brings, which Sino consistently delivers:
Property | “Basic” Steel Core (Conceptual) | Sino’s Cold Rolled Motor Lamination (e.g., NGO M270-35A equivalent) | Unit | Significance for Your Motor |
Core Loss @ 1.5T, 50Hz | > 6.0 W/kg | Typically < 2.70 W/kg (often better with Sino’s process control) | W/kg | Dramatically reduced energy waste, higher efficiency |
Lamination Thickness | Can be variable, thicker | Precisely controlled, often 0.35mm, 0.50mm, or even thinner | mm | Significantly lower eddy current losses |
Inter-laminar Resistance | Lower / Inconsistent | High & Consistent (due to quality coating on each sheet) | Ohm-cm² | Blocks eddy currents between laminations effectively |
Table 1: Property Comparison
| Property | “Basic” Steel Core (Conceptual) | Sino’s Cold Rolled Motor Lamination (e.g., NGO M270-35A equivalent) |
|---|---|---|
| Core Loss @ 1.5T, 50Hz | > 6.0 W/kg | Typically < 2.70 W/kg (often better with Sino’s process control) |
| Lamination Thickness | Can be variable, thicker | Precisely controlled, often 0.35mm, 0.50mm, or even thinner |
| Inter-laminar Resistance | Lower / Inconsistent | High & Consistent (due to quality coating on each sheet) |
Table 2: Units and Significance
| Property | Unit | Significance for Your Motor |
|---|---|---|
| Core Loss @ 1.5T, 50Hz | W/kg | Dramatically reduced energy waste, higher efficiency |
| Lamination Thickness | mm | Significantly lower eddy current losses |
| Inter-laminar Resistance | Ohm-cm² | Blocks eddy currents between laminations effectively |
Source for general properties: Manufacturer datasheets from leading electrical steel producers like ThyssenKrupp Electrical Steel (now part of Tata Steel), AK Steel (Cleveland-Cliffs), Posco, etc., and standards like ASTM A677/A677M.
Real-World Impact Example: Electric Vehicles (EVs)
Consider the burgeoning electric vehicle (EV) market. Every watt-hour of battery energy is precious. If an EV motor has high core losses, that’s energy being drained as heat instead of propelling the car further. By using high-quality, thin-gauge cold rolled motor lamination from Sino, EV manufacturers can design motors that are significantly more efficient. This translates directly to:
- Increased vehicle range
- A smaller battery requirement for a given range (reducing weight and cost)
- A more powerful motor in the same physical space
Boosting Magnetic Permeability – Getting More Punch from Your Motor
Magnetic permeability is a super important property for your motor’s oomph. It’s a measure of how easily a material can be magnetized, or how well it “conducts” magnetic flux. You need high permeability in your motor core.
The carefully controlled deformation and annealing processes involved in producing cold rolled motor lamination sheet significantly enhance this permeability. The refined grain structure and, in some specialized grades, preferred crystallographic orientation, make it much easier for the magnetic field to establish itself and flow through the core. At Sino, we don’t just take any cold rolled motor lamination coil; we select materials and process them in ways that optimize this crucial characteristic.
Built Tough: Mechanical Strength and Formability
The work hardening that occurs during the cold rolling process naturally increases the steel’s yield strength and hardness. This is a good thing, as it makes the individual cold rolled motor lamination sheet more resistant to deformation. However, there’s a balance to be struck. If it’s too hard, it becomes difficult to punch or stamp cleanly, leading to increased tool wear and potentially poor-quality laminations with excessive burrs.
Real-World Impact: Where Sino's Laminations Power Progress
The applications for Sino's high-quality cold rolled motor lamination products are as diverse as the modern world itself:
Automotive
From main traction motors in EVs and hybrids to countless auxiliary motors for power steering, HVAC blowers, window lifts, and seat adjusters.
Renewable Energy
Generators in wind turbines, where maximizing energy conversion is paramount.
Industrial Automation
Servo motors, stepper motors, and general-purpose induction motors driving conveyor belts, robotic arms, machine tools, and pumps.
Aerospace & Defense
Specialized motors requiring high power density and extreme reliability in demanding environments.
Appliances
Motors for washing machines, dryers, refrigerators, air conditioners, vacuum cleaners, and kitchen gadgets, where efficiency and quiet operation are key.
Medical Devices
Motors for surgical tools, diagnostic equipment, and patient mobility aids, where precision and dependability are life-critical.
HVAC Systems
Fan and blower motors that need to run efficiently and reliably for years.
Looking Ahead: The Evolving World of Motors and Sino's Commitment
At Sino, we’re not just keeping pace; we’re anticipating these changes. We continuously invest in our processes, explore advancements in electrical steel and insulation technologies, and work closely with our clients to understand their future needs. Whether it’s ultra-thin laminations from the latest cold rolled motor lamination coil for ultra-high-speed motors or specialized geometries for axial flux machines, Sino is committed to being at the forefront of lamination technology.
Reach Out To Our Team Today
Don’t let subpar laminations be the weak link in your design. Experience the Sino difference. Let’s build the future of motion, together.
- [email protected]
- +86 17727849205
- North and South Avenue, Du Ruan Town, Pengjiang District, Jiangmen, China
Note: To speed up your project, you can label Lamination Stacks with details such as tolerance, material, surface finish, whether or not oxidized insulation is required, quantity, and more.
