Brushless servo control system and driving apparatus based on permanent magnet brushless DC motor

A technology of permanent magnet brushless DC and driving devices, which is applied in the direction of controlling electromechanical transmission devices, control systems, vector control systems, etc., can solve the problems of sampling, difficulty in application, and inability to carry out phase current, etc., and achieve good real-time computing and power The effect of low power consumption and high integration

Inactive Publication Date: 2009-08-05
常州合泰电机电器股份有限公司
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AI Technical Summary

Problems solved by technology

[0003] In the past, the electric drive system with permanent magnet brushless DC motor as the control object, although the cost is low, but the traditional brushless DC motor, because there is no current sampling element, so it cannot perform phase current sampling

Method used

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  • Brushless servo control system and driving apparatus based on permanent magnet brushless DC motor
  • Brushless servo control system and driving apparatus based on permanent magnet brushless DC motor
  • Brushless servo control system and driving apparatus based on permanent magnet brushless DC motor

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Embodiment Construction

[0029] see figure 1 It is a working principle block diagram of the FPGA adopted by the drive device control unit of the present invention. The FPGA is a second-order system in which the current closed loop, the speed closed loop, and the position closed loop are interlocked from the inside to the outside. The three closed loops are realized by the following modules:

[0030] The current closed-loop module includes a 2 / 3 vector conversion module connected in series, a current closed-loop control module, a PWM current control module and gate drive logic: the current detection feedback signal is converted by analog to digital and then input to the FPGA with two current signals FBU-I and FBV-I, first enters the 2 / 3 vector conversion module to generate three current feedback signals, the current feedback signal is used as the feedback input terminal of the current closed-loop control module, and the command input terminal of the current closed-loop control module is the speed close...

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Abstract

The invention provides a driving device of a permanent magnetic brushless direct current (DC) servo motor, comprising a control unit, an interface unit and a driving unit; the control unit is connected with the driving unit by the interface unit; the control unit adopts a field programmable gate array (FPGA) and has high integration, low power dissipation and good operation real-time performance; the key point of the design of the control system is the control to three loops: a current loop, a speed loop and a position loop and the integral matching of the three loops so that three control modes of moment, speed and location can be realized; the control system can be used for simple speed regulation and also can be applied to high-precision positioning control situations; and when the brushless servo control system of the driving device is adopted, the current detection feedback signal and the magnetic pole detection feedback signal are directly obtained from the feedback element of the permanent magnetic brushless DC motor, thus being different from the traditional sampling method of the feedback signal of the servo system, thereby ensuring the signal sampling precision and reducing the cost.

Description

Technical field: [0001] The invention belongs to the field of industrial automation control, and in particular relates to a brushless servo control system and a driving device with an FPGA as a core control unit and a permanent magnet brushless DC servo motor as a control object. Background technique: [0002] With the continuous progress of science and technology and the rapid development of economy in our country, in the field of industrial control, the application field of servo system is becoming wider and wider. According to the national conditions of our country, in a large number of cases, it is necessary to use small automation equipment, which requires low cost, but also needs to meet the high precision and fast response of automatic control. In order to adapt to this national condition, the inventor at first designs and improves the control object of the servo system, that is, the motor body. The AC servo motor widely used at present is due to the use of incrementa...

Claims

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Application Information

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IPC IPC(8): H02P6/00H02P6/08H02P6/16H02P21/14
Inventor 赵卫忠徐琛
Owner 常州合泰电机电器股份有限公司
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