Variable Speed Permanent Magnet Drive

Variable Speed Permanent Magnet Adjustable Speed Drives – Intelligent Process Control Solution

JM Variable Speed Permanent Magnet Adjustable Speed Drives (PMASDs) provide fully automated, signal-responsive speed regulation for industrial systems. Our advanced design integrates seamlessly with process control networks to dynamically adjust equipment speed based on real-time operational demands such as pressure, airflow, or temperature signals.

How It Works

Signal Input & Processing

Sensors monitor load parameters (flow, pressure, temperature).

A PLC/PID controller processes data and outputs a 4–20mA control signal.

Precision Speed Adjustment

The signal drives an actuator to modulate the air gap between permanent magnet and conductor disks.

Wide speed range: 10%–100% of full speed (adjustable via HMI or DCS).

Flexible Control Modes

Fully Automatic: Continuous closed-loop optimization.

Manual Override: Local actuator adjustment during maintenance.

Remote Control: Integration with DCS/SCADA systems.

Key Advantages

✔ Real-Time Speed Regulation – Instant response to process variables.

✔ Zero Energy Consumption – No parasitic power loss (unlike VFDs).

✔ Harmonic-Free – Eliminates grid pollution and motor heating.

✔ High Efficiency – Up to 20% energy savings vs. throttling/valve control.

✔ Low Maintenance – No contacting parts or lubricants required.

✔ Vibration Isolation – Reduces wear on bearings/seals by ≥30%.

Technical Specifications

Control Signal: 4–20mA (standard) / Profibus/Modbus (optional)

Speed Adjustment: 10%~100% of rated speed

Power Range: 15–2000kW

Ambient Temp.: -30°C to +80°C

Protection Class: IP54/IP65 (explosion-proof available)

Typical Applications

HVAC Systems: Fan/pump speed control for optimal airflow/pressure

Process Industries: Compressor load matching in chemical plants

Water Treatment: Variable flow control for energy savings

Mining: Conveyor speed synchronization