CN220325527U

CN220325527U - Multi-axis servo system

Info

Publication number: CN220325527U
Application number: CN202321469960.3U
Authority: CN
Inventors: 张雨; 荣文文
Original assignee: Beijing Puride High Tech Co ltd
Current assignee: Beijing Puride High Tech Co ltd
Priority date: 2023-06-09
Filing date: 2023-06-09
Publication date: 2024-01-09
Anticipated expiration: 2033-06-09

Abstract

The utility model discloses a multi-axis servo system, comprising: a controller; a rectifier; and, three inverters; wherein the controller is in electrical signal connection with the inverter; the rectifier rectifies a power supply of power frequency into direct current; the inverter converts direct current into a motor power supply with controllable frequency and voltage according to a control signal of the controller. According to the multi-axis servo system provided by the utility model, one controller and three inverters are integrated, and three servo motors can be controlled by using one device, so that multi-axis control of dragging, sawing, feeding and the like is realized.

Description

Multi-axis servo system

Technical Field

The utility model relates to the technical field of servo driving, in particular to a multi-axis servo system.

Background

The servo driving technology is to rectify the power supply of the power frequency into direct current, and then convert the direct current into a motor power supply with controllable frequency and voltage through an inverter, thereby realizing the speed and torque control of the alternating current motor.

The prior art adopts a scheme that a controller and a driver are separated, so that the number and the parameters of the motor are changed to inevitably change the number and the types of the drivers, the operation period is long, the matching is not easy, and the maintenance and the debugging are inconvenient.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a multi-axis servo system to solve the technical problems in the background technology.

A multi-axis servo system comprising: a controller; a rectifier; and, three inverters; wherein the controller is in electrical signal connection with the inverter; the rectifier rectifies a power supply of power frequency into direct current; the inverter converts direct current into a motor power supply with controllable frequency and voltage according to a control signal of the controller.

Further, the control signal is a PMW signal.

Further, the inverter comprises an IGBT driving circuit and an IGBT, and the controller is in electric signal connection with the IGBT through the IGBT driving circuit.

Further, the IGBT driving circuit comprises a driving chip, wherein the model of the driving chip is ACPL-333J-500E;

the 8 th pin of the driving chip is in electrical signal connection with the controller;

and the 11 th pin of the driving chip is connected with the IGBT electric signal.

Further, the 3 rd pin of the driving chip is electrically connected with the controller, the 14 th pin of the driving chip collects the Vds voltage of each MOS tube of the IGBT, and if the Vds voltage exceeds a preset threshold voltage, a trigger signal is sent to the controller.

Further, the IGBT is provided with three-phase current output, current sampling circuits are connected between two of the two-phase current output ends of the IGBT and the motor, and the current sampling circuits are connected with the controller in an electric signal mode;

the controller receives the data stream of the current sampling circuit and converts the data stream into a corresponding voltage value.

Further, the current sampling circuit comprises a sampling resistor and a sampling chip, the model of the sampling chip is ACPL-C797, the sampling chip collects the voltage of the sampling resistor through a 2 nd pin and a 3 rd pin, and a 6 th pin and a 7 th pin of the sampling chip are electrically connected with the controller.

The beneficial effects of the utility model are as follows:

according to the multi-axis servo system provided by the utility model, one controller and three inverters are integrated, and three servo motors can be controlled by using one device, so that multi-axis control of dragging, sawing, feeding and the like is realized.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 is a block diagram of an electrical structure of a multi-axis servo system according to an embodiment of the present utility model;

fig. 2 is a circuit diagram of connection of an IGBT according to an embodiment of the present utility model;

fig. 3 is a circuit diagram of an IGBT driving circuit according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a sampling circuit according to an embodiment of the present utility model.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, the present utility model provides a multi-axis servo system, including: a controller; a rectifier; and, three inverters; wherein the controller is in electrical signal connection with the inverter; the rectifier rectifies a power supply of power frequency into direct current; the inverter converts direct current into a motor power supply with controllable frequency and voltage according to a control signal of the controller.

The inverter comprises an IGBT driving circuit and an IGBT, and the controller is electrically connected with the IGBT through the IGBT driving circuit. The IGBT driving circuit generates a corresponding PMW signal according to a control instruction of the controller. IGBT (Insulated Gate Bipolar Transistor) the insulated gate bipolar transistor is a compound full-control voltage-driven power semiconductor device composed of a (Bipolar Junction Transistor, BJT) bipolar transistor and an insulated gate field effect transistor (Metal Oxide Semiconductor, MOS). In this embodiment, as shown in fig. 2, each IGBT includes 6 MOS transistors, and each MOS transistor is electrically connected to the controller through an IGBT driving circuit corresponding to one.

Specifically, as shown in fig. 3, the IGBT driving circuit includes a driving chip and its peripheral circuit, the type of the driving chip is ACPL-333J-500E, and the 8 th pin of the driving chip is electrically connected to the controller; and the 11 th pin of the driving chip is electrically connected with the control end of the corresponding MOS tube in the IGBT. The command signal issued by the controller is amplified by the driving chip and then drives the MOS tube to act.

And ACPL-333J-500E has the overcurrent alarm function, the 3 rd pin of driver chip with the controller electrical signal connection, the 14 th pin of driver chip gathers the Vds voltage of every MOS pipe of IGBT, if Vds voltage exceeds preset threshold voltage, 14 th pin output low level, send trigger signal to the controller.

As shown in fig. 2, the IGBT has a three-phase current output connected to the motor, and current sampling circuits are connected between two of the two current output ends of the IGBT and the motor, and the current sampling circuits are electrically connected to the controller. In the present embodiment, as shown in fig. 4, sampling resistors are connected in series to the U-phase output and the V-phase output of the IGBT.

The controller receives the data stream of the current sampling circuit and converts the data stream into a corresponding voltage value. Specifically, the current sampling circuit comprises a sampling resistor and a sampling chip, the model of the sampling chip is ACPL-C797, the sampling chip collects the voltage of the sampling resistor through a 2 nd pin and a 3 rd pin, and a 6 th pin and a 7 th pin of the sampling chip are electrically connected with the controller.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.

Claims

1. A multi-axis servo system, comprising:

a controller;

a rectifier; the method comprises the steps of,

three inverters; wherein,

the controller is in electrical signal connection with the inverter;

the rectifier rectifies a power supply of power frequency into direct current;

the inverter converts direct current into a motor power supply with controllable frequency and voltage according to a control signal of the controller.

2. A multi-axis servo system as recited in claim 1 wherein: the control signal is a PMW signal.

3. A multi-axis servo system as recited in claim 1 wherein: the inverter comprises an IGBT driving circuit and an IGBT, and the controller is electrically connected with the IGBT through the IGBT driving circuit.

4. A multi-axis servo system as recited in claim 3 wherein: the IGBT driving circuit comprises a driving chip, wherein the model of the driving chip is ACPL-333J-500E;

5. The multi-axis servo system of claim 4 wherein: the 3 rd pin of the driving chip is in electrical signal connection with the controller, the 14 th pin of the driving chip collects the Vds voltage of each MOS tube of the IGBT, and if the Vds voltage exceeds a preset threshold voltage, a trigger signal is sent to the controller.

6. The multi-axis servo system of claim 5 wherein: the IGBT is provided with three-phase current output, a current sampling circuit is connected between two of the two-phase current output ends of the IGBT and the motor, and the current sampling circuit is connected with the controller through an electric signal;

7. The multi-axis servo system of claim 6 wherein: the current sampling circuit comprises a sampling resistor and a sampling chip, the model of the sampling chip is ACPL-C797, the sampling chip collects the voltage of the sampling resistor through a 2 nd pin and a 3 rd pin, and a 6 th pin and a 7 th pin of the sampling chip are electrically connected with the controller.