Variable Frequency Drive

In the Variable Frequency Drive from our end, the stopping sequence is just the opposite as the starting sequence. The frequency and voltage applied to the motor are ramped down at a controlled rate. When the frequency approaches zero, the motor is shut off. A small amount of braking torque is available to help decelerate the load a little faster than it would stop if the motor were simply switched off and allowed to coast.

Features:

• Correct frequency
• Apt voltage
• Low on maintenance

Applications:

• Metal industry
• Construction industry
• Wire industry

VFD initially applies a low frequency and voltage, thus avoiding high inrush current associated with direct-on-line starting. After the start of the VFD, the applied frequency and voltage are increased at a controlled rate or ramped up to accelerate the load. This starting method typically allows a motor to develop 150% of its rated torque while the VFD is drawing less than 50% of its rated current from the mains in the low-speed range.

Features:

• Avoids high inrush current
• Controlled rate
• Great applied frequency

Applications:

• Metal industry
• Construction industry
• Wire industry