Define the operating envelope
Confirm voltage, power, base and maximum frequency, speed range, torque profile and process duty.
High-speed VFD control across low-, 690 V and medium-voltage platforms.
WD400-HS, WD600 and WD5100-HS support stable, precise and scalable control for high-speed induction and permanent-magnet motors.
Up to 3000 Hz output
220/380 V, 690 V and 3/6/10 kV
Induction and PM motor control
Encoder, PLC and DCS integration
Coordinate the motor, drive and process as one high-speed system.
High-speed centrifugal compressors, magnetic-bearing blowers, vacuum pumps, MVR compressors, refrigeration systems and machine-tool spindles demand more than a higher output frequency. Control bandwidth, field weakening, bearings, critical speed, cooling, harmonics and safe stopping all affect performance.
Wolong selects the drive platform and control architecture around motor voltage, power, maximum speed, base frequency, field-weakening range, bearing type and energy flow. The result is an engineered system rather than a frequency-only product selection.
Match motor and control
Choose induction or permanent-magnet motor control, parameter identification, encoder feedback and field-weakening strategy.
Engineer the system
Coordinate bearings, rotor dynamics, cooling, cable, filtering, grounding and process interlocks.
Commission and protect
Validate acceleration, critical-speed zones, vibration, overspeed and controlled or emergency stopping logic.
High-speed control capability from tens of kilowatts to megawatt-class machinery.
Configure the platform around the real motor, mechanical system and process—not frequency alone.
Up to 3000 Hz output
WD400-HS and WD600 support 0–3000 Hz applications. WD5100-HS extends engineered medium-voltage high-speed control to 1200 Hz.
Vector control at high speed
V/F, sensorless vector control and closed-loop vector control are selected according to motor type, feedback and dynamic requirements.
Wide motor compatibility
Low- and medium-voltage platforms support induction and synchronous or permanent-magnet motors for conventional, air-bearing and magnetic-bearing systems.
Full-voltage portfolio
WD400-HS covers 220/380 V, WD600 serves 690 V high-power systems, and WD5100-HS covers 3, 6 and 10 kV projects.
Feedback and communications
Encoder and industrial-network options support integration with magnetic-bearing controllers, PLC, HMI, SCADA and DCS systems.
System protection chain
Overspeed, current, voltage, temperature, vibration, bearing, cooling and process signals can be coordinated into project-specific interlocks.
Direct-drive performance depends on the complete machine.
Removing or simplifying a speed-increasing gearbox can improve system compactness and reduce transmission components, but the final design must also account for rotor dynamics, bearings, motor insulation and safe shutdown.
- Motor electromagnetic data and field-weakening range
- Critical speeds, vibration limits and bearing control
- Output filtering, cable length, EMC and grounding
- Air or water cooling for the drive, motor and bearings
- Power-loss, overspeed and emergency-stop strategy
For rotating equipment where speed, control and system reliability converge.
High-speed spindles
High-frequency output, a wide field-weakening range and encoder feedback for five-axis machining, grinding and precision manufacturing.
Centrifugal machinery
Engineered control for high-speed compressors, magnetic- or air-bearing blowers, MVR and refrigeration compressors.
Vacuum and energy equipment
Application-specific drive design for vacuum pumps, flywheel energy storage, shaft generation and other high-speed systems.
Magnetic-bearing blowersMVR steam compressorsOil-free refrigeration and heat pumps
A shorter transmission chain with more controllable operation.
Simplify the drivetrain
Create the conditions to remove or simplify gearboxes, couplings and related lubrication systems.
Match the real process
Control flow, pressure, vacuum or spindle speed around actual operating demand.
Scale across voltage levels
Use one engineering approach across low voltage, 690 V and medium-voltage systems.
Improve commissioning visibility
Bring drive, feedback, alarms and trends into the machine or plant control system.
Select the platform by voltage, power, frequency and energy flow.
Ratings shown are portfolio-level references. Frequency derating, feedback, communications, cooling, filtering and two- or four-quadrant operation must be confirmed in the technical agreement.
ParameterWD400-HSWD600WD5100-HS
Voltage220 V single-phase
380 V three-phase690 V three-phase3 / 6 / 10 kV
380 V three-phase690 V three-phase3 / 6 / 10 kV
Power / capacity0.75–710 kW250–1250 kW280–16,000 kVA
Output frequency0–3000 Hz0–3000 Hz0–1200 Hz
ControlV/F, SVC, FVCV/F, SVC, FVCSVC, FVC
Motor typesInduction, PMSMInduction, PMSMInduction, synchronous
Typical scopeSpindles, vacuum pumps, compact centrifugal machinesHigh-power fluid machinery and magnetic-bearing systemsMVR and megawatt-class medium-voltage direct drive
Safe high-speed operation is a multidisciplinary design task.
Final engineering checks motor insulation, back EMF, field weakening, bearing control, critical speed, vibration, cable and filtering, heat management and stop strategy. The drive then exchanges commands, status, alarms and trends with the machine PLC, HMI or plant DCS.
Functions and configurations vary by model and project. Confirm the final specification with Wolong application engineering.
High-speed VFD questions.
How is a high-speed VFD different from a standard VFD?
It requires a higher output-frequency range, faster control and sampling, suitable motor algorithms, feedback options and coordinated high-speed protection.
Which platform should I choose?
Start with motor voltage and power: WD400-HS for 220/380 V, WD600 for 690 V high-power equipment, and WD5100-HS for 3/6/10 kV systems. Then verify frequency, field weakening, bearings and quadrant requirements.
Can it drive magnetic- or air-bearing PM motors?
Yes, subject to project verification. The bearing controller, cooling, position or vibration signals, backup stopping energy and safety interlocks must be designed together.
Does every application benefit from removing the gearbox?
No. Direct drive is most attractive for high-duty systems where transmission losses and maintenance are material. The business case must be calculated for each project.
Get a high-speed drive solution for your machine.
Share motor voltage and power, base and maximum frequency, speed and torque curve, bearing system, cooling, cable length, energy-flow direction and control requirements. Our team can help define the drive, feedback and protection architecture.