electric motors
electric motors
dispensing technology for electric motors:
protect winding, ensure performance
Electric motors are at the heart of countless applications – from drives for pumps and machine tools to electric vehicles. In all these areas, dispensing technology is a decisive quality factor. Whether the precise trickling of low-viscosity resins into stator and rotor windings, potting to meet protection classes or the fixing of sensors: dosmatix offers precise and reliable systems for all relevant dispensing applications – from prototypes to automated series production.
why is dispensing technology crucial in electric motors?
Impregnating the winding is one of the most demanding dosing tasks: Low-viscosity resins must be instilled into the stator winding in a targeted and reproducible manner – evenly, without overdosing and with a constant, controlled material flow. The dos screw progressive cavity dispenser is ideal for this application: its continuous, pulsation-free dispensing principle ensures uniform droplet application over the entire process duration. At the same time, the electrification of the drive train increases the requirements for protection classes (IP67/IP68), thermal stability and electrical insulation. Dispensing technology is not a minor matter here, but a direct prerequisite for the performance and service life of the motor.
typical applications and materials
winding impregnation (drip)
Targeted, pulsation-free dosing of very small quantities of impregnating resin and impregnating varnish directly into the stator winding – winding impregnation with dosing system for reproducible results from prototype to series production.
stator potting
Complete encapsulation of electric motor housings with 2K epoxy resin or PU, atmospheric or in a vacuum to increase mechanical stability and protection.
magnetic bonding
Structural bonding of magnets in the rotor with high-strength 1C or 2C epoxies.
sensor integration
Precise spot dispensing of silicones or epoxies for encapsulating and fixing sensors.
housing seal
Application of FIPG seals to achieve protection classes such as IP67 with 1C RTV silicones.
suitable dispensing technology from dosmatix
dispenser
dos piston
Piston dispenser, 2K
The solution for large-volume stator potting and 2K encapsulation. Guarantees precise volume dispensing and is suitable for bubble-free vacuum potting.
dos screw
Progressive cavity dispenser, 1K/2K
Our core tool for trickling on the electric motor, the specialized dosing system for electric motor production, which applies low-viscosity resins to the winding without pulsation and reproducibly – with programmable retraction for a clean thread break. Dispensing volumes from 0.3 μl enable maximum precision.
dos gear
Gear pump dispenser, 1K
Ideal for the continuous application of sealing seams to achieve high IP protection classes on housings and end caps.
your advantages with dosmatix
- Specialization: One of the few manufacturers to explicitly address demanding trickling as a core application.
- Precise volume flow: Constant, reproducible material flow over the entire trickling process – regardless of viscosity fluctuations in the resin.
- Gentle on the material: The pulsation-free application of the dos screw prevents pressure peaks in the material system and ensures that the impregnating material is conveyed evenly and gently.
- Complete supplier: All relevant dosing processes for engine construction from a single source.
frequently asked questions and answers
What is the advantage of the progressive cavity principle for trickling?
A: The dos screw works pulsation-free. This means that the material flow is constant and uniform over the entire process duration – without pressure peaks or volume fluctuations. This is particularly important for low-viscosity impregnating resins, as even small irregularities in the volume flow can lead to uneven wetting of the winding.
Does dosmatix offer a complete solution for the dosing process in engine production?
A: Yes, we cover all central dispensing processes: from high-precision trickling (dos screw) to potting (dos piston) and sealing (dos gear). You receive all solutions from a single source.
Can thermal pastes also be used for the thermal management of electric motors be dosed?
A: Yes. dosmatix offers two suitable systems depending on the application: For precise bead applications and very small quantities, the dos screw is the right choice – its progressive cavity principle processes pasty, highly filled heat-conducting pastes without pulsation and with low wear, even with abrasive fillers such as Al₂O₃. The dos piston is recommended for larger quantities and high throughput in series production – the piston principle with flushing liquid ensures a continuous, reproducible material flow and also protects the system from deposits.
contact us
your direct contact
sales(at)dosmatix.com
Phone: +49 8783 9667 530
