Offers 2 or 3 discrete speeds with zero complex electronics. The ultimate durable, low-cost speed control solution.
For applications like machine tool cutting, mixers, or conveyors that require only fixed high/low speed switching, the YD Series changes speed by changing winding poles, typically via a Dahlander connection.
Free from the capacitors and semiconductors found in VFDs, this motor is copper and silicon steel. It is built for dust and heavy vibration, with a fit-and-forget reliability that electronic drives do not match.
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
Mechanical Reliability
Speed variation is achieved solely by altering stator winding connections. Speed is locked to the grid frequency, which removes VFD issues such as torque loss at low speed or parameter tuning errors.
EMC Friendly
The YD series generates no high-frequency harmonics. It will not interfere with precision instruments, sensors, or communication lines, which suits laboratory equipment and auxiliary drives on precision machine tools.
Cost-Effective
Eliminate the stack of motor, VFD, shielded cables, and filters. The YD Series needs only contactors for dual-speed control, which cuts initial equipment cost and simplifies the circuit.
Stiff Characteristic
The speed-torque curve is hard, so rotational speed stays nearly constant as the load changes. That matters for drill presses and milling machines that need a consistent cutting speed.
Industry Applications
FAQ
How does a YD series motor achieve different speeds?
The YD series uses a pole-changing design. By changing the internal winding connections, for example from 4 poles to 8 poles, the motor switches between distinct speeds, such as 1500 rpm and 750 rpm, without an external frequency inverter.
Are YD motors more cost-effective than using a VFD?
For applications that only need 2 or 3 fixed speeds, YD motors are more cost-effective. They remove the cost and complexity of a VFD and stay reliable where electronics may fail.
What are the common applications for YD multi-speed motors?
They are widely used in marine, mining, and machine tool industries, including winches, drilling machines, and lathes where stepped speed control is preferred.
