The motor that understands fluid dynamics. Tailored for quadratic load characteristics to eliminate the energy waste of oversizing.
Fans and pumps obey the affinity laws: reducing speed by 50% drops power consumption to about one eighth. Standard constant-torque motors deliver excess power at low speeds.
The YDT Series uses a variable-torque winding design. Torque output varies with the square of the speed, matching the load curve of impellers. It is a cost-effective speed-control solution for HVAC systems and pump stations.
Decode the JWmotor model number to quickly identify the specifications for a precise replacement.
Technical Specifications
JWMotor Product Range:
Technical DownloadsOperating Conditions
* Class H insulation is available for high-temperature environments.
* Power derating is required for high-altitude regions.
JWMotor offers you motor solutions with the following significant advantages
Quadratic Torque Matching
Output torque varies with the square of the speed, mirroring the load curve of fans and pumps. This avoids the over-excitation, overheating, and waste seen when constant-torque motors are forced to run at low speed.
Structural Energy Savings
Using the affinity laws, large energy reductions come from switching poles, for example to low speed during off-peak hours, without an expensive VFD. It suits cooling towers and ventilation systems.
Optimized for High-Inertia Loads
The rotor design is tuned for the high moment of inertia of large fan impellers. Start-up stays smooth under heavy load, which reduces shock on belts, pulleys, and couplings.
Simplified Control & Maximum Reliability
Flow is regulated by contactor switching instead of throttling valves and failure-prone VFDs. The result is a robust system with very low maintenance.
Industry Applications
FAQ
What is the main difference between YD and YDT series motors?
Both are multi-speed. The YDT series is optimized for variable-torque loads. Power output changes with the square of the speed, which matches centrifugal fans and pumps and raises efficiency on those loads.
How much energy can I save by switching to a YDT motor for my HVAC system?
By switching speeds with demand, high speed for peak hours and low speed for off-peak, YDT motors can reduce energy use by about 30-50% compared with single-speed motors controlled by mechanical throttling.
Can YDT motors withstand the high starting torque of large fans?
Yes. YDT motors use copper windings and reinforced rotors for the high inertia of large industrial fans and water pumps, so start-up stays smooth.
