Regenerative Variable Speed Drives

Regenerative drives are a solution for regenerative operation in cyclic or continuous braking applications. such applications include cranes, elevators ,centrifuges, downhill conveyers and test benches.

With regenerative functionality , the braking energy of the motor is returned to the drive and distributed to the supply network so that it can be utilized by other equipment. compared to mechanical or resistor braking, where braking energy is wasted as heat , regenerative drive operation offers significant energy consumption and cooling savings.

Possibility to regenerate 100% of power continuously

benefits:

Minimized downtime

The VFD will not interrupt the process or affect its quality in unstable supply network conditions. The drive’s active supply unit can boost the output voltage to enable full motor voltage, even when the supply voltage is below nominal value. This ensures reliable operation in weak networks. This voltage boost capability can also be utilized to overcome voltage drops caused by long supply or motor cables.

Optimized cost and space

Everything needed for regenerative operation, such as an active supply unit and a low harmonic line filter are integrated into the drive, and no external braking devices are needed.

Advantages:

• Quick, easy drive installation
• Small installation footprint
• No need to add cooling to handle the heat generated by mechanical or resistor braking
• simplified wiring
• Fewer spare parts needed

^{The drive’s voltage boost capability} can be an advantage in motor dimensioning. With a higher motor voltage, the same power is achieved with less current, which improves motor efficiency and may allow a smaller motor to be used.

The drives also can offer a possibility of ^{network power factor correction} to compensate for the low power factors of equipment connected to the same network. It reduces the need for additional power factor correction equipment such as filters and large capacitor banks.

Maximize motor performance and efficiency

The drive can provide full motor voltage, even if the supply voltage fluctuates. Regeneration can occur for as long as necessary and as often as needed.

The drive features direct torque control (DTC) provides precise speed and torque control for maximum motor performance and motor efficiency.