Permanent magnet synchronous motor (PMSM) AC servo system

A technology of permanent magnet synchronous motor and permanent magnet, applied in the field of servo system

Inactive Publication Date: 2010-10-20
南京大桥机器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inherent shortcomings of DC motors limit its development in the direction of high speed, high voltage, and large capacity.

Method used

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  • Permanent magnet synchronous motor (PMSM) AC servo system
  • Permanent magnet synchronous motor (PMSM) AC servo system
  • Permanent magnet synchronous motor (PMSM) AC servo system

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Experimental program
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Embodiment Construction

[0063] specific implementation plan

[0064] system structure

[0065] The key problem of the all-digital PWM frequency converter is how to obtain the PWM control switch signal in time. Normally, there are two control algorithms for obtaining PWM waves, namely, the traditional sub-harmonic PWM (forward rotation PWM) method and the newly proposed current space vector method PWM method. The space current vector control PWM method has obvious advantages in terms of reducing the harmonic loss of the motor current, eliminating torque fluctuations, improving the performance of the control system, or from the aspect of the voltage utilization of the DC side of the inverter.

[0066] The application of high-speed digital signal processor (DSP) can make the system develop towards full digitalization with high reliability, high performance and convenient maintenance. TMS320F2812 fixed-point digital signal processor is used as the main control chip to complete the current loop, speed lo...

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PUM

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Abstract

The invention relates to a permanent magnet synchronous motor (PMSM) AC servo system, which is composed of a DSP control panel, a rotary transformer, a main power circuit and a conditioning and protecting circuit, a motor body consists of an armature winding and a permanent magnet core rotor, wherein the motor is excited by a permanent magnet, and the DSP is used for realizing an field-orientated control algorithm, communication, sampling calculation of current and configuration output of a drive; the output of the rotary transformer enables data to be transmitted to the DSP via four-path DA transform chips and SPI of the DSP or multi-channel buffering; the DSP outputs pulse width modulation, is connected with voltage signals output by a current regulator, and is connected with a PWM1-PWM3 drive inverter which can convert the voltage signals into three-phase switch signals by CLARK inverse transformation, and the inverter outputs to the armature winding so as to control the armature winding of the motor to generate a rotary round magnetic field; and the main power circuit is composed of a direct current detection circuit with controllable rectification, an inverter, a current detection circuit, an overvoltage discharging circuit, a protection circuit and a driving circuit. The invention adopts the field-orientated control algorithm which can control the torque, speed and position state of the motor in real time and has good control performance.

Description

technical field [0001] The invention relates to a servo system, that is, a servo control method and system for an AC permanent magnet synchronous motor. Background technique [0002] As the main equipment for converting electrical energy into mechanical energy, the motor must not only have high electromechanical energy conversion efficiency, but also be able to control and adjust the rotation speed according to the process requirements of the production machinery. The speed control system is an important part of the servo system, and its performance plays a decisive role in improving product quality, improving labor productivity and saving electric energy. [0003] The speed control system is composed of a power part, an execution part and a control part, and different combinations of each part constitute a variety of speed control systems. For a long time, DC motors have been widely used in engineering because of their superior speed regulation performance but their shortc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/12
Inventor 黄丹丹张健许沛
Owner 南京大桥机器有限公司
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