Alternating current servo driver capable of realizing energy feedback

Abstract

The invention discloses an alternating current servo driver capable of realizing energy feedback, which comprises a power unit and a control unit, wherein the power unit comprises an overvoltage protection module, a noise filter, a three-phase input alternating current reactor, a PFC (Power Factor Correction) correction regenerative braking module and a servo driving module which are connected in sequence; a soft start module and an energy storage filter capacitor are also arranged between the PFC correction regenerative braking module and the servo driving module; the control unit comprises a digital signal processor, an interface circuit module, a direct current bus voltage detection module, a voltage sampling module and two current sampling modules, wherein the interface circuit module, the direct current bus voltage detection module, the voltage sampling module and the current sampling module are respectively connected between the digital signal processor and the power unit. The alternating current servo driver can realize the feedback of energy in a power grid, but also can be used for rectifying and filtering the three-phase alternating current of the power grid, effectively reduces the pollution generated by the power grid, saves the energy and protects the energy.

Description

technical field [0001] The invention relates to the field of AC servo drives, in particular to an AC servo drive capable of energy feedback. Background technique [0002] With the development of power electronics technology and the increase of non-linear electrical load load, it is increasingly required that electrical equipment has no pollution to the grid, that is, it is required to add a power factor correction function to the input side of the power supply. At present, energy consumption braking is mostly used in domestic small and medium-capacity systems to realize the operation of the motor. Although this method is simple, it wastes energy, reduces the efficiency of the system, causes severe heating of the resistor, affects the normal operation of other parts of the system, and limits the improvement of braking performance. Therefore, the dynamic braking method can only be used for small and medium capacity systems below tens of kilowatts. At the same time, due to th...

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Problems solved by technology

However, these products need to add additional processing links, which indirectly increase the cost, and are expensive, so it is difficult to be popularized and applied in a wide range

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