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Large variable frequency synchronous motor

Stable speed, high starting torque, load starting capability; high efficiency, low long-term energy consumption; established technology, low cost; suited for heavy-duty applications. A frequency converter is used for stepless speed regulation, continuous torque below base speed, and constant power above, resulting in precise control, smooth operation, low noise, and robust overload capacity.
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  • Product Description

Large Variable Frequency Synchronous Motor - Enterprise-Class Solutions

Tellhow Shenyang Electric Machine's Large variable frequency synchronous motor offers you enterprise-grade performance with power outputs from 400kW to 20,000kW across 49 specialized series. Built in our 190,000-square-meter facility with 8 million kW annual production capacity, our motors achieve 15–20% lower energy consumption through proprietary magnetic circuit designs and high-precision manufacturing. You'll benefit from stepless speed regulation, continuous high torque below base speed, and proven reliability across multiple global certifications including CE, UL, and VDE standards.

What Makes Our Variable Frequency Synchronous Motors Different?

Your operations demand more than just standard motors.

Our Large variable frequency synchronous motor systems integrate seamlessly with Variable Frequency Drives to give you precise speed and torque control. Unlike conventional fixed-speed solutions, you get synchronicity maintained through advanced excitation technology.

Key benefits you'll experience:

  • Reduced starting stress - Eliminate high inrush currents that damage equipment
  • Optimized power factor - Achieve unity power factor through adjustable excitation
  • Lower operating costs - Cut energy consumption significantly with efficiency exceeding 97%
  • Smooth operation - Enjoy low noise levels and minimal vibration

The technology solves your critical pain points: mechanical stress from sudden load changes, inefficient power usage, and premature equipment failure.

What Makes Our Variable Frequency Synchronous Motors Different?

Technical Specifications That Matter to Your Business

ParameterSpecification
Item Number500—1120
Rated Frequency5Hz—85Hz
Power Range400kW—20,000kW
Rated Voltage600V, 690V, 1650V, 3150V, 3300V, 6600V, 10,000V
Number of Poles4—20 poles
Protection GradeIP44, IP54, IP55
Cooling MethodIC81W, IC60W, IC616
Installation TypeHorizontal, Vertical, Stand-type
Connection TypeTerminal Box
Starting ModeVariable Frequency Drive
Ambient Temperature≤40°C
Altitude≤1,000m
Insulation/Temperature ClassF Class/B Class

These specifications translate to real-world advantages for your facility. The wide voltage range accommodates diverse power infrastructure. Multiple cooling methods ensure optimal thermal management for your specific environment. Protection grades from IP44 to IP55 mean your investment stays protected in demanding conditions.

Where Your Industry Benefits Most

Heavy Industry Applications

Mining and Minerals Processing

Your SAG mills and ball mills require exceptional starting torque and low-speed continuous operation. Our motors deliver precisely that. They handle extreme dust, vibration, and cyclic loading that would destroy standard equipment.

Metals and Metallurgy

In hot rolling mills, you need rapid dynamic response. Our Large variable frequency synchronous motor provides the speed synchronization necessary for maintaining dimensional accuracy in steel and aluminum production. Your quality control improves while energy costs drop.

Oil and Gas Operations

For compressor stations in remote locations, reliability isn't optional. Our motors provide the precise flow control your transcontinental pipelines demand, even in hazardous environments.

Additional Industrial Sectors

  • Power generation facilities
  • Water conservation projects
  • Petrochemical plants
  • Construction materials production
  • Environmental protection systems

Each application benefits from our intelligent adaptive load regulation and multi-dimensional condition monitoring capabilities.

Where Your Industry Benefits Most

Advanced Engineering Features

Superior Control Technology

You gain precise control through our proprietary high-efficiency algorithms. The system automatically adjusts to load variations, optimizing performance in real-time.

Thermal Excellence

Our patented magnetic circuit designs deliver improved heat dissipation. You'll see this in extended service life and consistent performance even under continuous operation.

Wide Operating Range

Continuous torque below base speed ensures you have power when starting heavy loads. Constant power above base speed gives you the flexibility for variable process requirements.

Robust Overload Capacity

When unexpected demand spikes occur, your motor handles them. Our designs include substantial overload margins that protect your operations.

Customization for Your Exact Requirements

We understand that one size never fits all in industrial applications.

Our ODM/OEM capabilities include:

  • Custom power ratings tailored to your process
  • Specific speed range configurations
  • Modified insulation classes for your environment
  • Voltage and frequency adaptation
  • Brand-specific appearance options
  • Small-batch specialized production

You work directly with our engineering team. We've completed over 2,100 specifications across our product range, so chances are we've solved challenges similar to yours.

Quality Assurance You Can Trust

Every motor undergoes rigorous testing before it reaches your facility.

Our quality control process includes:

  • Insulation Resistance Testing - Verifies VPI system integrity
  • Polarization Index Measurement - Ensures long-term insulation reliability
  • Partial Discharge Analysis - Detects early aging from VFD switching
  • Dynamic Balancing - Meets ISO 1940 standards for vibration control
  • Heat Run Tests - Validates cooling system efficiency under load
  • Full-load Back-to-Back Testing - Confirms performance at variable frequencies

This comprehensive testing means fewer surprises and more uptime for your operations.

Global Support Network

Your investment includes more than just hardware.

You receive:

  • Localized technical consultation
  • Timely spare parts supply
  • On-site commissioning support
  • Performance optimization guidance
  • Full documentation in your language

Our team understands the critical nature of your operations. We respond quickly because your downtime is expensive.

Why Choose Tellhow Shenyang Electric Machine?

Five decades of motor manufacturing expertise backs every unit we produce.

Our 500 million RMB capitalization and modern manufacturing facility give you confidence in long-term partnership stability. We're not a small workshop that might disappear—we're building a globally recognized motor manufacturing base.

You benefit from:

  • Proven technology in established industrial applications
  • Long-term cost savings through superior efficiency
  • Easier maintenance with accessible component design
  • Compliance with international safety and environmental standards
  • Innovation rooted in practical application experience

We don't just sell motors. We solve your operational challenges with engineered solutions backed by comprehensive support.

Why Choose Tellhow Shenyang Electric Machine?

Frequently Asked Questions

Q: How does variable frequency operation affect motor insulation?

A:VFDs can create voltage spikes that stress insulation. We address this through reinforced VPI insulation and corona protection meeting IEC 60034-18-41 standards. Your motor stays protected throughout its service life.

Q: Can these motors improve our facility's power factor?

A:Absolutely. By adjusting excitation current, our product provides reactive power compensation to your grid. It acts as a synchronous condenser, potentially reducing power factor penalties from your utility.

Q: What maintenance does the excitation system require?

A:For brushless excitation models, maintenance is minimal. You'll need periodic diode bridge inspections and annual insulation testing. No brush replacements mean less downtime and lower maintenance costs.

Q: How do you manage shaft currents in VFD-driven motors?

A:We install insulated bearings on the non-drive end and grounding brushes on the drive end. This prevents Electrostatic Discharge (EDM) damage that can destroy bearings prematurely.

Q: Is forced cooling necessary for our application?

A:If your operation involves prolonged low-speed, high-torque requirements, yes. At low RPMs, the integral fan becomes less effective. We'll specify an independent forced-air or water-cooling system matched to your duty cycle.

Q: How do your motors integrate with existing automation systems?

A:Our motors support standard industrial communication protocols. You'll achieve seamless integration with your SCADA, PLC, and condition monitoring systems. Real-time data flows where you need it.

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

A:Standard configurations ship within 8-12 weeks. Custom engineered solutions typically require 14-18 weeks, depending on specification complexity. We'll provide a detailed timeline during your consultation.

Ready to Optimize Your Operations?

Contact our technical team at sxmotor@yeah.net to discuss your specific requirements for Large variable frequency synchronous motor.

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