There are two ways to stop a frequency converter .
One method is called "free-wheeling." As the name suggests, it involves quickly "cutting off the power" to the motor, allowing it to coast to a stop using its own inertia (OFF2 parking).
Another form is called "braking stop". There are many ways to "brake stop". For example, OFF1 stopping is braking to a stop by a certain slope deceleration, or OFF3 "emergency braking" stopping (stopping according to the motor's limit braking capacity).
Second, braking and stopping methods include: DC braking (which involves supplying a certain amount of DC current); dynamic braking (using resistors to dissipate energy); hybrid braking (DC braking + dynamic braking); regenerative braking (injecting generated current into the power grid); and mechanical braking with a holding brake.
Parking can be divided into ramp parking and free parking (fast parking is also ramp parking, only the ramp is steeper).
Braking can also be mechanical (such as holding brake), regenerative braking (braking resistor, reverse braking, DC braking, etc.), and regenerative braking. Whether braking is needed depends on the motor's operating state. When stopping a ramp, braking is required if the required stopping time is less than the free stopping time. Braking is also sometimes needed when the motor is running normally, such as when the hook is lowering.
In a drive system consisting of a power grid, inverter, motor, and load, energy can be transferred bidirectionally. When the motor is in motor operating mode, electrical energy is transferred from the power grid to the motor via the inverter, converting it into mechanical energy to drive the load, thus giving the load kinetic or potential energy. When the load releases this energy to change its state of motion, the motor is driven by the load and enters generator operating mode, converting mechanical energy back into electrical energy and feeding it back to the upstream inverter. (Copyright http://www.diangon.com) This feedback energy is called regenerative braking energy, which can be fed back to the power grid through the inverter or consumed in the braking resistor on the inverter's DC bus (energy-consumption braking).
Applications that generate braking energy
1. The process of lowering heavy objects using lifting equipment
2. Rapid deceleration process of large inertia load
