There are two ways to park a drive.
One way is called "free parking". It is to quickly "power off" the motor, so that the motor can slide and park by its own inertia force (OFF2 parking);
The other way is called "braking parking". Then there are many ways to "brake parking". For example, OFF1 parking is braking according to a certain slope deceleration, or OFF3 "emergency braking" parking (parking according to the motor's maximum braking capacity).
Second, the means of braking and parking are: DC braking (that is, the power is given into a certain direct current); power braking (energy dissipation with resistors); hybrid braking (DC braking + power braking); Regenerative braking (injecting generating current into the grid); Mechanical braking of the brake.
Parking is divided into ramp wave parking and free parking (fast parking is also ramp wave parking, but the ramp wave is steeper).
Braking also includes mechanical braking (such as brake brake), energy consumption braking (braking resistance, reverse braking, DC braking, etc.), feedback braking, etc. Whether braking is required is related to the working condition of the motor, and braking needs to be used when the required parking time is less than the free parking time when the oblique wave is parked; There are times when braking is also required when the motor is working properly, such as when the hook is lowered.
In the drive system composed of power grid, inverter, motor and load, energy can be transmitted in both directions. When the motor is in the working form of the motor, the electric energy is transmitted from the power grid to the motor through the inverter, and is converted into mechanical energy to drive the load, and the load thus has kinetic energy or potential energy; When the load releases these energies in order to change the motion conditions, the motor is driven by the load and enters the working form of the generator, converting the mechanical energy into electrical energy and feeding back to the front-stage inverter. （http://www.diangon.comThis feedback energy is called regenerative braking energy and can be fed back to the grid by the inverter, perhaps in the braking resistor on the inverter's DC bus (energy braking).
Occasions when braking energy is generated
1. The process of decentralization of heavy objects of lifting equipment
2. Rapid deceleration process of large inertia loads
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