Servo intelligent power control circuit and servo intelligent power control method based on thyristor rectification

Abstract

The invention discloses a servo intelligent power control circuit and a servo intelligent power control method based on thyristor rectification. The control circuit comprises an MCU (microprogrammed control unit), a signal processing circuit, a sampling circuit, an ADC (analog-digital converter) conversion circuit, an alarm processing circuit and a thyristor triggering circuit, wherein the sampling circuit is used for acquiring alternating-current and direct-current bus voltage and current signals and providing the acquired signals for the signal processing circuit and the ADC conversion circuit; the signal processing circuit is used for reshaping and comparing the acquired signals and providing a natural phase change point of a corresponding-phase alternating-current bus for the MCU; and the MCU is used for processing the signals from the signal processing circuit and the ADC conversion circuit and controlling a thyristor array by the aid of the thyristor triggering circuit. The control circuit solves the technical problems that output voltage is non-adjustable as alternating-current and direct-current rectification portions adopt three-phase diode rectifiers, continuous powering up cannot be achieved as a thermistor is used for soft start, or secondary failure occurs easily as a high-power cement resistor is adopted.

Description

technical field [0001] The invention is mainly applied to single-axis or multi-axis AC servo drives and spindle drives with rectification and inverter separation, and is specifically a control circuit and method for an intelligent power supply based on thyristor rectification. Background technique [0002] With the continuous development of power electronics technology, various switching device technologies are constantly improving. Switching power electronic converters have been widely used in daily life, industry, transportation, military equipment and cutting-edge technology in recent decades. In the AC motor frequency conversion and variable voltage speed regulation system, the AC-DC-AC topology is mainly used. At present, the uncontrolled rectification circuit is mainly used in the AC and DC rectification part, and the soft start mainly adopts thermistor or high-power cement resistance charging mode plus relay bypass. In the thermistor solution, after powering on seve...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a servo intelligent power supply control circuit based on thyristor rectification, aiming to solve the problem that the output voltage cannot be adjusted due to the use of uncontrolled rectification circuits in the AC and DC rectification parts, and the soft start uses thermistors and cannot be continuously powered on or uses high-power cement. Technical problems that are prone to secondary failure due to resistance

Images