OKE inverters offer exceptional braking performance, achieving instantaneous braking in 0.1 seconds at 50Hz. With a current-sensorless vector output of ±0.5Hz, it delivers 180% of rated torque, ±0.5% steady-state accuracy, and a 1:100 adjustment ratio, providing rapid start-stop performance in as little as 0.1 seconds and ensuring no abrupt phase sequence changes or torque pulsation during motor forward and reverse rotation.
When the output frequency of the Ouke frequency converter approaches zero and the motor speed drops to a certain value, the frequency converter redirects DC to the stator winding of the asynchronous motor, forming a static magnetic field. At this time, the motor is in a regenerative braking state, and the rotating rotor cuts the static magnetic field to generate braking torque, causing the motor to stop quickly.
This requires setting the DC braking voltage value of the OKE inverter, which is essentially setting the magnitude of the braking torque. Obviously, the greater the inertia of the drive system, the larger the DC braking voltage value should be. Generally, the rated output voltage of an OKE inverter with a DC voltage of around 15-20% is about 60-80V. Some use the percentage value of the braking current. The DC braking time is the time for DC current to be applied to the stator winding. It should be slightly longer than the actual required stopping time. The DC braking starting frequency refers to the frequency at which the inverter's operating frequency drops to start switching from regenerative braking to DC braking. This is related to the load's requirements for braking time. If there are no strict requirements, the DC braking starting frequency should be set as low as possible.
Instantaneous braking in 0.1 seconds
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