Why Do Frequency Inverters Sometimes Experience Reverse Power Supply?

frequency converter 60hz to 50hz 3 phase is responsible for rectifying AC power into DC power and then inverting it into variable frequency AC power to control the motor speed and torque. Under load conditions, such as when the mechanical load driven by the motor is decelerating, braking, or going downhill, the potential and kinetic energy of the motor's mechanical parts will be converted back into electrical energy and flow back to the DC link inside the frequency converter 60hz to 50hz single phase motor. This process is known in the professional field as "regeneration" or energy feedback.

During regeneration, the motor operates as a generator, and its output voltage differs from the original input frequency, causing energy to be fed back to the DC bus of the solid state frequency converter. If the frequency converter 50hz to 60hz 3 phase does not have a braking unit or energy feedback device, this energy accumulation will cause the DC bus voltage to rise, and the 240v 50hz to 120v 60hz converter may detect this energy backflow phenomenon and generate an abnormal state.

In some high-inertia load scenarios, this reverse energy flow is relatively significant, such as when a crane is lowering or a hoist is braking. If the regenerated energy is not fed back to the grid through a braking resistor, it will accumulate in the internal capacitor, causing the drive circuit to withstand higher voltages.