Alternating current servo driver system and control method

Abstract

The invention belongs to the technical field of servo drivers and discloses an alternating current servo driver system and a control method. A DSP (digital signal processor) of the system is connectedwith a three-phase sine PWM voltage type inverter and a rotating transformer through leads, the three-phase sine PWM voltage type inverter and the rotating transformer are connected with a three-phase permanent magnet type synchronous alternating current servo motor through leads, a rectifying filter circuit is connected with a soft start circuit through a lead, the three-phase permanent magnet type synchronous alternating current servo motor is connected with a photoelectric encoder and a current sampling circuit, and the DSP is sequentially connected with a PLC (programmable logic controller) and a touch display screen through leads. The system is controlled by the DSP, forms speed and displacement control closed loops through frequency conversion operation, is more sensitive to controland quick to start, cannot impact a driver, acquires speed and current data of the motor and sends acquired data to the DSP for corresponding control.

Description

technical field [0001] The invention belongs to the technical field of servo drives, and in particular relates to an AC servo drive system and a control method. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] At present, the servo motor refers to the engine that controls the operation of mechanical components in the servo system, and is an auxiliary motor indirect transmission device. It can control the speed and position accuracy very accurately, and can convert the voltage signal into torque and speed to drive the control object. [0004] The control accuracy of the existing servo motor is not high enough, which leads to the insufficient response of the servo motor; the measurement data of the speed and current of the servo motor is not accurate, which makes the processor prone to misjudgment; shock. [0005] In summary, the problems in the prior art are: [0006] The control accuracy of the ...

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Problems solved by technology

[0006] The control accuracy of the existing servo motor is not high enough, which leads to the insufficient response of the servo motor; the measurement data of the speed and current of the servo motor is not accurate, which makes the processor prone to misjudgment; shock

[0007] In the existing technology for sampling the speed and current of the three-phase permanent magnet synchronous AC servo motor, it is not easy to construct a network model of an unknown network and determine each parameter in the model. The accuracy of the empirical model is low and it is not intuitive enough. The process Complicated, resulting in poor control performance of the servo drive system

[0008] In the prior art, the DSP digital signal processor controls the speed and torque of the three-phase permanent magnet synchronous AC servo motor with poor accuracy

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