Two speed motor

Two Speed Motor: Precision Control for Industrial Applications

Tellhow Shenyang Electric Machine's Two speed motor combines decades of manufacturing expertise with cutting-edge engineering. Our motors can switch speeds quickly and easily in harsh industrial settings. They have shaft heights ranging from 355 mm to 1250 mm and peak powers from 200 kW to 30,000 kW. With a production capacity of 8 million kW and more than 2,100 specifications spread across 49 series, you get proven reliability, energy savings of 15–20%, and intelligent load adaptation. All of this is designed to work continuously in demanding industries like mining, metallurgy, petrochemicals, and environmental protection.

Why Choose Our Dual-Speed Motor Solutions?

Your factory line doesn't always need to be on full blast. That's where our technology that changes poles really shines.

Energy Efficiency That Cuts Costs

Running things at high speeds all the time burns energy. Our motors have two set speeds, so you can match the amount of power they use to the load they are driving. If you do this instead of slowing down a single-speed unit, your energy bills will go down by 15–20%. You'll meet the economy standards for IE2 or IE3 and lower your total cost of ownership at the same time.

Built for Industrial Endurance

Equipment that can handle rough conditions is needed. The machines we sell have:

• Better methods for getting rid of heat
• High-precision design of electromagnetic
• Strong design for low-vibration use
• A lot of power and frequency options

It works the same way whether you're driving cooling towers on ocean sites or air fans in underground mines.

Intelligent Speed Switching

Thanks to our interlocked contactor design, the change between speeds is smooth. No changes need to be made by hand for your system to adapt to new situations. This smart process keeps your motor safe from short circuits when the poles are switched, and it also makes the motor last longer.

Real-World Applications

Industrial HVAC and Emergency Ventilation

Tunnels and tall buildings have special problems with how air flows through them. During normal times, your ventilation runs at a low speed, keeping the air moving comfortably while saving energy. When fire alarms trigger, the Two speed motor instantly shifts to high speed, rapidly clearing smoke and protecting lives. Because it can work in two modes, it is essential for setups that need to be safe.

Maritime Cooling Systems

Ships and offshore platforms work in conditions that are toxic and have changing temperature loads. Our motors power big radial fans whose speeds change based on the temperature and the engine's needs. You get the most mileage out of your gas while the motor's protective cover keeps it from rusting in salt water. This dependability keeps your ship going well on long trips.

Precision Material Handling

For different jobs, overhead cranes and hoists need to move at different speeds. When your workers are placing big dies or fragile parts, low-speed mode gives them precise control. In high-speed mode, moving things across the warehouse floor faster speeds up output. You can make things safer and more productive without spending a lot of money on variable frequency drives.

Technical Specifications

Dahlander vs. Separate Winding: Which Fits Your Needs?

Dahlander Configuration

This plan only has one winding, so it can reach a 2:1 speed ratio, like 1500/3000 RPM. If your application fits the set ratio, it's easier and cheap. You get the benefits of small structure and easy upkeep.

Separate Winding Configuration

Need a different speed range, like 1000 RPM to 1500 RPM? Having separate windings gives you options. You can choose any ratio because each spiral works on its own. This choice is good for specific uses where normal rates don't meet your performance needs.

Can It Replace a Variable Frequency Drive?

Yes, as long as your process only needs two set speeds. A pole-changing motor might be better than a VFD for the following reasons:

• Less expensive up front: you don't need an expensive transformer.
• Fewer electrical parts mean fewer places where things can go wrong, which means higher dependability.
• There is no electromagnetic interference: Important in sensitive places
• Maintenance is easier because it only involves fixing motors and not complicated technology.

A VFD is still the better choice, though, if you need to change the speed infinitely. We'll help you figure out which option fits your business needs.

Customization and Support

Tailored Engineering (ODM/OEM)

Every business use is different. Our tech team makes changes to:

• Setting up power and speed
• Improvements to the insulation class
• Designing the structure and look
• Setting up the mounts and adding on shafts

If you need samples in small quantities or a lot of them, we can work around your plan and needs.

Global Service Network

You're never alone after installation. Our support includes:

• Localized technical assistance
• Professional engineering consultation
• Stable spare parts supply chain
• Lifecycle maintenance services

We ensure your motors deliver peak performance throughout their operational life.

Why Tellhow Shenyang Electric Machine?

With a registered capital of 500 million RMB and a 190,000-square-meter production facility, we combine scale with specialization. Our 49 product series cover AC motors, Permanent Magnet Synchronous Motors, frequency-controlled motors, and explosion-proof units. We serve power generation, metallurgy, mining, construction materials, petrochemicals, water conservancy, and environmental protection industries worldwide.

Our philosophy—"National Tellhow, International Tellhow"—drives continuous innovation. We invest in intelligent manufacturing and sustainable development, ensuring your Two speed motor incorporates the latest advances in electromagnetic design, thermal management, and control technology.

Frequently Asked Questions

Q1: What causes overheating at low speed?

A:Overheating typically occurs when a variable-torque motor is used in a constant-torque application, or when the internal fan doesn't provide adequate airflow at lower RPMs. We'll help you select the correct motor type and cooling configuration during the design phase.

Q2: Do I need special starting equipment?

A:Yes. A pole-changing starter with interlocking contactors and transition delay is essential. This prevents short circuits during speed switching and ensures safe operation. We can recommend compatible starters or integrate them into your control panel.

Q3: How do energy savings compare to single-speed motors?

A:When you operate at the lower speed setting, energy consumption drops significantly compared to running a single-speed motor at full power with mechanical throttling. Real-world customers report 15–20% reductions in electricity costs, with payback periods under two years.

Q4: Can these motors handle explosive atmospheres?

A:Yes. We manufacture explosion-proof variants certified for hazardous locations. Our portfolio includes motors compliant with ATEX and IECEx standards, suitable for petrochemical plants, mining operations, and offshore platforms.

Q5: What's the typical lead time for custom configurations?

A:Standard configurations ship within 4–6 weeks. Custom designs require 8–12 weeks, depending on complexity. Rush orders can be accommodated—contact our sales team to discuss your timeline.

Contact Us

Reach out to our engineering team at sxmotor@yeah.net to discuss your specific requirements for Two speed motor.