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Segmented-PI-control-based low-voltage direct-current servo driver

A servo drive, low-voltage DC technology, applied in control systems, AC motor control, electrical components, etc., can solve the problems of risk, single function, and high price in follow-up protection, and achieve high reliability, simple hardware design, and dynamic response. fast effect

Inactive Publication Date: 2016-03-30
连云港杰瑞电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to research, in the special industrial control and military industries, due to the harsh application environment, the products are often required to have high environmental adaptability, and there are few similar drive products. Implementing a technical blockade, even if military-grade products can be purchased through special channels, there are risks in its follow-up support; 2. The country started late in this technical field, and existing products generally have disadvantages such as expensive prices, single functions, and large volumes

Method used

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  • Segmented-PI-control-based low-voltage direct-current servo driver

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Embodiment 1, with reference to figure 1 , a low-voltage DC servo drive based on segmented PI control:

[0046] The control system of the servo drive includes three control loops: current loop, speed loop and position loop. After receiving the enable signal from the host computer, the servo drive enters the drive mode and is quantified by the A / D conversion circuit or communication interface. The position, speed or torque current signal of the host computer is used as the input signal of the position loop, speed loop or current loop to control the output of the MOSFET inverter circuit to drive the servo motor; at the same time, the incremental encoder and current sampling circuit detect the angle, speed, The current data is used as the feedback signal of the three loops, and the DSP processor controls the output of the MOSFET drive circuit to drive the servo motor according to the command data and the PI control algorithm of the feedback data; a logic processing circuit...

Embodiment 2

[0047] Embodiment 2, in a low-voltage DC servo driver based on segmental PI control described in Embodiment 1: the circuit of the servo driver mainly includes a power supply unit, a main control unit, an inverter unit, a signal conditioning unit, motor speed and angle Measuring unit, failsafe unit and communication unit.

Embodiment 3

[0048] Embodiment 3, in a low-voltage DC servo driver based on segmental PI control described in Embodiment 2, each unit circuit is specifically:

[0049] a) Power supply unit

[0050] Including main control 5V power supply and 12V drive power supply;

[0051] The main control 5V power supply circuit is used to generate the power supply required for the operation of the control circuit;

[0052] The 12V drive power supply circuit is used to generate the power supply required by the MOSFET drive circuit;

[0053] The input end of the power supply unit of the servo driver is equipped with a filter capacitor and a surge protection circuit composed of a one-way conductive diode, TVS, varistor, and inductor;

[0054] b) Main control unit

[0055] The main control unit mainly includes a DSP signal processor circuit;

[0056] The DSP signal processor circuit mainly completes the tasks of command acceptance, various signal acquisition, PWM signal generation, output torque control, s...

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Abstract

The invention relates to a segmented-PI-control-based low-voltage direct-current servo driver. A control system consists of three control loops: an electric current loop, a speed loop, and a position loop. After receiving an enabling signal from an upper computer, the servo driver enters a driving working mode; quantization of a position, speed or torque current signal of the upper computer is carried out by an A / D conversion circuit or communication interface and thus an input signal of the position loop, speed loop, or the electric current loop is obtained; and the output of an MOSFET inverter circuit is controlled to drive the servo driver. Meanwhile, an incremental encoder and a current sampling circuit detect angle, speed, and current data serving as feedback signals of the three loops; and a DSP processor controls the output of the MOSFET inverter circuit based on a PI control algorithm of command data and feedback data so as to drive the servo driver. The provided servo driver has characteristics of simple hardware design, small size, convenient maintenance, wide speed regulation range, fast dynamic response speed, and high reliability and the like.

Description

technical field [0001] The invention belongs to the field of direct current motor drive, and in particular relates to a low-voltage direct current servo driver based on subsection PI control. Background technique [0002] Servo drive products are widely used in industrial production, mainly in high-precision CNC machine tools, robots and other generalized CNC machinery, such as textile machinery, printing machinery, packaging machinery, medical equipment, semiconductor equipment, automatic assembly lines, etc. At present, the domestic servo market is dominated by foreign-funded brands, mainly from Japan, Europe and the United States, accounting for 76.8%, and domestic brands account for 23.2%. The market competition is very fierce. [0003] Compared with the industrial servo drive market, the military-grade servo drive market has the characteristics of customized product demand, relatively less competition, and localization requirements. At the same time, military-grade serv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P23/00H02P27/08
Inventor 邱静燕聪廖良闯张允志曹为理李云飞王龙飞
Owner 连云港杰瑞电子有限公司
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