Energy consumption brakingbraking device and method for servo driver

Abstract

The invention relates to an energy consumption brakingbraking device and method for the servo driver. The energy consumption braking device comprises a current sampling module, a rotation speed outputting module, an inertia identifying module and a braking controlling unit; the current sampling module is used for detecting the current signal Ir flowing through the braking resistor R and outputting the current signal to the braking controlling unit; the rotation speed outputting module is used for outputting the running rotation speed (omega)s and the given rotation speed (omega)ref of the servo motor; the inertia identifying module is used for obtaining the current rotating inertia Js of the servo motor; the braking controlling unit pre-calculates according to the control algorithm to obtain the feedback energy (delta)W, and calculates the braking energy consumption (delta)Wf in real time according to the current signal Ir flowing through the braking resistor in the braking process, and makes the feedback energy (delta) W be equal to the braking energy (delta)Wf through the feedback controlling link, so as to realize the energy consumption braking process.

Description

technical field [0001] The present invention relates to a braking device, in particular to a dynamic braking device for a servo driver, and a method for dynamic braking for a servo driver, which is based on the predicted Energy is used to plan the braking process of the motor in advance, and relevant information is collected in real time during the braking process to adjust the braking control amount, so that the fluctuation of the bus voltage is controlled within a small range, and the torque fluctuation of the system is suppressed. Background technique [0002] The energy fed back by the motor during the braking process of the servo drive will increase the bus voltage, and the amplitude of the bus voltage increase ΔU=(2×ΔW / C)^0.5, where ΔW is the feedback energy, and C is connected in parallel on the bus Capacitance value. At this time, if the energy consumption braking unit is not added to absorb the feedback energy, the bus voltage rise too high will break down the capa...

AI Technical Summary

Problems solved by technology

However, since this control method detects that the bus voltage reaches the upper threshold or lower threshold, it will act, and adopts hysteresis control, so that the bus voltage will fluctuate between the set upper and lower thresholds during the braking process.

The fluctuation of the bus voltage undoubtedly affects the life of the capacitor C on the bus, and also causes torque ripple, which reduces the service life and working performance of the servo drive

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