When selecting WPDS155-20-A-5.5kW, the closed-loop calibration of 'Load → Speed/Speed Ratio → Heat Balance → Installation and Interface → Environment and Maintenance' should be implemented to ensure that the torque, temperature rise and adaptability meet the standards at the same time.
Core points
Load and torque: Clear the continuous/peak torque and operating condition coefficient to ensure ≤ the sample allowable value and avoid impact overload.
Speed to speed ratio: Input speed ≤1500 r/min; press n motor/n output to confirm or select i=20 nearby.
Thermal balance and efficiency: WPDS155 i=20 Efficiency is about 60%-71%, and the temperature rise is calculated based on this; >40℃ or high load requires cooling/derating.
Installation and shaft position: Confirm the A position details and space of 'Input shaft on + Motor flange' and check that the motor flange matches the shaft extension.
Environment and lubrication: -40℃~+40℃; preheat lubricating oil at <0℃, cool at>40℃; select viscosity and period according to the sample.
Interface and bearing: output shaft diameter/keyway, shaft radial load limit; thicken shaft or strengthen bearings if necessary.
Self-locking and safety: Single-head large-speed multi-large self-locking; when reverse self-locking is required, it is confirmed with a sample.
Brand and sample: Different manufacturers have different sizes/load bearing/efficiency, and the sample selected manufacturers shall prevail.
Key verification steps
Calculate the output torque: T=9550×P input ×η/(n input/i), and count the working condition coefficient; compare the sample allowable value.
Thermal balance verification: Estimate the heating by P loss = P in ×(1−η), and evaluate it in combination with ambient temperature, load rate and cooling conditions.
Installation and centering: Strictly follow the sample installation size and centering requirements to avoid biased loads and additional bending moments.
Prone to misunderstandings and suggestions
Only look at the power without core torque → It must be based on torque and impact coefficient Selection.
Ignore the thermal balance → High temperature/high loads must be derating or cooled.
Do not look at the samples based on experience → The samples of the selected manufacturer shall prevail to avoid deviations from size and load.
