In traditional frequency converter systems, situations such as rapid deceleration, braking and positioning are required.

At this time, because the inertia of the transmission system is large and the motor is in the power generation state, the DC bus voltage needs to be kept below the safe range.

This feedback energy is quickly consumed. The traditional solution is to use a braking resistor to consume the regenerated energy as heat.

Although the wiring is simple and the overall purchase cost is low, the disadvantage is that the braking resistor is bulky.

Additional heat dissipation is required, the braking capacity is limited and energy cannot be effectively utilized. However, the wiring of Delta's power feedback unit is as simple as the braking resistor.

However, as long as the braking resistor occupies half of the machine, electrical energy can be regenerated.

In addition, additional heat dissipation devices are omitted, and the braking capacity is better than that of traditional braking resistors, improving cost performance and achieving green energy saving.