Variable Frequency Drive VFD

Variable Frequency Drive VFD

A Variable Frequency Drive (VFD) is an advanced electronic control system used to precisely regulate the speed, torque, and direction of stirrer drive motors in glass reactors, agitators, and process vessels. By varying the input frequency and voltage, the VFD enables smooth, vibration-free operation, improved process control, and energy efficiency across a wide operating range.

Key Features & Benefits

• Accurate RPM control across low and high speeds
• Soft start & soft stop to eliminate mechanical shock
• Constant torque output at low speeds
• Energy-efficient motor operation
• Overload, over-current & short-circuit protection
• Reverse / forward rotation control
• Reduced wear on seals, shafts & gearboxes
• Improved safety & longer equipment life

Functional Capabilities

• Manual & automatic speed control
• Acceleration & deceleration time setting
• Digital speed (RPM / Hz) display
• Remote control via PLC / DCS
• Fault diagnostics & alarm indication
• Emergency stop & interlock compatibility

Technical Specifications

Parameter	Specification
Drive Type	Variable Frequency Drive (VFD)
Motor Compatibility	AC induction motors
Power Range	0.25 HP to 30 HP
Input Supply	1Ø / 3Ø, 230–415 V AC
Output Frequency	0.1 – 400 Hz
Speed Control Accuracy	±0.5%
Control Modes	V/F Control, Vector Control
Starting Torque	Up to 150%
Enclosure Protection	IP20 / IP54 / IP65
Cooling Method	Forced air cooling
Operating Temperature	0°C to 45°C
Mounting	Wall mounted / Panel mounted

Safety & Protection Features

• Overload protection
• Phase loss & phase imbalance protection
• Short-circuit protection
• Thermal protection
• Earth fault protection
• Emergency stop compatibility

Applications

• Glass reactor agitation systems
• Chemical & pharmaceutical processing
• Distillation & extraction units
• Pilot plants & R&D facilities
• Explosion-proof & flameproof drive systems
• Variable viscosity mixing operations

Optional Configurations

• Flameproof control panels
• Explosion-proof enclosures
• PLC / SCADA integration
• Remote speed control potentiometer
• Digital communication (Modbus / Profibus)

Why Choose VFD-Controlled Stirrer Drives?

• Precise process control
• Reduced energy consumption
• Lower maintenance costs
• Improved operational safety
• Enhanced product consistency