Motor driver and automation equipment

Abstract

The utility model relates to a motor driver and automation equipment, the motor driver comprises an encoder interface used for connecting an encoder, and the encoder interface comprises a power supply terminal used for providing standby power for the encoder; and the encoder power supply interface is electrically connected with the power supply terminal. The encoder power supply interface is arranged on the motor driver and is connected with the power supply terminal for standby power supply of the encoder interface, so that the number of cables for connecting the motor driver and the motor is reduced, the total length of the cables is reduced, less space is occupied, wiring of automation equipment is more concise, and the cost is reduced. Management is easy, optimization of the space layout of the automation equipment is facilitated, and the reliability of the automation equipment is improved.

Description

Technical Field

[0001] The utility model relates to the field of automation, in particular to a motor driver and automation equipment. Background Art

[0002] When the number of motor shafts driven by motor drivers such as servo drives and stepper drives in industrial applications is large, the number of encoder cables and motor power cables connected between the motor drive and the motor also increases. In particular, when the motor uses a multi-turn absolute value type encoder, each set of motor drivers needs to be accompanied by a battery box for backup power supply for the encoder. Its function is to provide power to the motor encoder through the backup battery when the motor driver loses power supply, so as to save the current position data in the motor encoder when the power is off. However, as the number of motor shafts used in automation equipment increases, the cables connected to the motor are complicated and numerous, and they occupy a large space, which increases the difficulty of the maintenance process, and increases the number of cables inside the automation equipment, affecting the spatial layout and reliability. Therefore, how to facilitate the management of cables of automation equipment, optimize the spatial layout of automation equipment, and improve equipment reliability are issues that need to be solved urgently. Utility Model Content

[0003] In view of the deficiencies of the above-mentioned related technologies, the purpose of this application is to provide a motor driver and automation equipment, aiming to solve the problem that some motors are connected to a large number of cables and occupy a large space, which increases the difficulty of maintenance and affects the spatial layout and reliability.

[0004] A motor driver, comprising:

[0005] An encoder interface, used to connect an encoder, the encoder interface comprising a power supply terminal for providing backup power to the encoder;

[0006] An encoder power supply interface, wherein the encoder power supply interface is electrically connected to the power supply terminal.

[0007] The above-mentioned motor driver reduces the number of cables connecting the motor driver and the motor in some implementation processes by setting an encoder power supply interface on the motor driver and connecting it to the power terminal of the encoder interface backup power supply, and also reduces the total length of the cables to occupy less space, making the wiring of the automation equipment simpler and easier to manage, and helping to optimize the spatial layout of the automation equipment, thereby improving the reliability of the automation equipment.

[0008] Optionally, the motor driver includes at least two encoder interfaces, and each encoder interface is provided with the power supply terminal.

[0009] Optionally, the motor driver further includes power cable interfaces, and the number of the power cable interfaces is greater than or equal to the number of the encoder interfaces.

[0010] Optionally, the input ends of the power terminals are interconnected, and the output ends of the power terminals are used to connect the encoder cable; wherein the positive poles of the input ends are interconnected and electrically connected to the positive pole of the encoder power supply interface, and the negative poles of the input ends are interconnected and electrically connected to the negative pole of the encoder power supply interface.

[0011] Optionally, the encoder interface further includes a power supply terminal and a data terminal, and the data terminals in different encoder interfaces are independent of each other.

[0012] Optionally, two encoder power supply interfaces are connected to each other, and at least one of the encoder power supply interfaces is used to connect a backup power supply.

[0013] Optionally, the motor driver includes a battery box, and the battery box is used to be connected to the encoder power supply interface so that the battery arranged therein supplies power to the encoder power supply interface.

[0014] Optionally, the motor driver comprises a housing, a connecting structure for connecting the battery box is provided on the housing, and the battery box is detachably fixed to the housing via the connecting structure.

[0015] Based on the same inventive concept, the present application also provides an automation device, including the above-mentioned motor driver and a motor connected to the motor driver, and a backup power supply, wherein the backup power supply is connected to the encoder power supply interface of the motor driver.

[0016] Optionally, the automation equipment includes at least two of the motor drivers, and at least one of the motor drivers includes two encoder power supply interfaces, and the encoder power supply interfaces of the at least two motor drivers are directly or indirectly connected to the same backup power supply.

[0017] The above-mentioned automation equipment reduces the number of cables connecting the motor driver and the motor in some implementation processes by setting an encoder power supply interface on the motor driver and connecting it to the power terminal of the encoder interface backup power supply, and also reduces the total length of the cables to occupy less space, making the wiring of the automation equipment simpler and easier to manage, helping to optimize the spatial layout and improve reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic block diagram of connecting a motor driver to an encoder in the related art;

[0019] Figure 2A schematic block diagram of a motor driver connected to an encoder provided in an embodiment of the utility model;

[0020] Figure 3 A schematic block diagram of the structure of an encoder interface provided by an embodiment of the utility model;

[0021] Figure 4 A schematic block diagram of a multi-axis motor driver connected to an encoder provided in an embodiment of the utility model;

[0022] Figure 5 A schematic block diagram of a power cable interface connected to a motor provided in an embodiment of the utility model;

[0023] Figure 6 A schematic diagram of the connection of power terminals provided in an embodiment of the utility model;

[0024] Figure 7 A schematic diagram of the cascade connection of a motor driver provided by an embodiment of the utility model;

[0025] Figure 8 A schematic block diagram of a motor driver provided by an embodiment of the utility model and equipped with a battery box;

[0026] Description of reference numerals:

[0027] 1-motor driver; 11-encoder interface; 111-negative pole of power terminal; 112-positive pole of power terminal; 113-negative pole of data terminal; 114-positive pole of data terminal; 115-negative pole of power supply terminal; 116-positive pole of power supply terminal; 12-encoder power supply interface; 13-power cable interface; 14-battery box; 2-backup power supply; 21-connecting line; 3-encoder; 31-encoder cable; 4-motor; 41-power cable. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0030] like Figure 1As shown, the conventional motor driver 1 may be provided with an encoder interface 11, which is used to connect to the encoder cable 31, and finally connected to the encoder 3 of the motor 4 to power it and obtain the feedback signal of the encoder 3. In order to save the current position data of the motor when the motor driver loses power, the encoder 3 may be powered by an additional backup power supply 2 such as a battery. The connection line 21 of the backup power supply 2 is directly connected to the encoder 3 of the motor 4 to realize the backup power supply.

[0031] Example:

[0032] This embodiment provides a motor driver 1, see Figure 2-Figure 8 As shown, the motor driver 1 includes an encoder interface 11 and an encoder power supply interface 12. The encoder interface 11 is used to connect the encoder 3, and the encoder interface 11 includes a power supply terminal for providing backup power to the encoder 3. The encoder power supply interface 12 is electrically connected to the power supply terminal, and the power supply connected to the encoder power supply interface 12 can provide power to the power supply terminal, so the encoder power supply interface 12 can be used to connect the backup power supply 2.

[0033] In actual applications, the encoder interface 11 can be connected to the encoder 3 through the encoder cable 31. It should be noted that a cable may include one or more lines, each interface is used to connect to a cable, and the lines in the cable can be connected one-to-one with the terminals in the interface (such as power terminals). When the interface includes multiple terminals, the cable also has multiple lines corresponding to these terminals. In this embodiment, the backup power supply 2 connected to the encoder power supply interface 12 will form an electrical connection with the power terminal, and can provide backup power supply to the encoder 3 through the encoder interface 11. Figure 2 As shown, in actual application, the backup power supply 2 can be first connected to the encoder power supply interface 12 of the motor driver 1, and the encoder power supply interface 12 is electrically connected to the encoder interface 11, so that the encoder 3 is powered by the encoder cable 31 connected to the motor driver 1. By setting the encoder power supply interface 12 on the motor driver 1 and connecting it to the power supply terminal of the backup power supply in the encoder interface 11; compared with the traditional motor driver, the present application only needs to connect the encoder cable 31 between the motor 4 to realize the backup power supply to the encoder 3. The number of cables connecting the motor driver 1 and the motor 4 is reduced, and the total length of the cables is also reduced, thereby occupying less space, which will make the wiring of the automation equipment simpler, easier to manage, and help optimize the spatial layout of the automation equipment, thereby improving the reliability of the automation equipment.

[0034] See also Figure 3, an example of the composition of an encoder interface 11 is given, and the encoder interface 11 includes a power terminal, which may specifically include a negative pole 111 of the power terminal and a positive pole 112 of the power terminal. The side of the encoder interface 11 connected to the encoder cable 31 can be called the output end, and the input end is the end connected to the encoder power supply interface 12. The output end can be exposed to the outside for connecting the encoder cable 31, and the input end can be set inside the motor driver 1 and connected to the encoder power supply interface 12 through the internal circuit.

[0035] Continue to see Figure 3 As shown, the encoder interface 11 of this embodiment also includes a data terminal and a power supply terminal. The data terminal may specifically include a negative electrode 113 of the data terminal and a positive electrode 114 of the data terminal, and the power supply terminal may specifically include a negative electrode 115 of the power supply terminal and a positive electrode 116 of the power supply terminal. The data terminals in different encoder interfaces 11 are independent, that is, different encoder interfaces 11 will be able to connect to different encoders 3 and communicate with the encoders 3 respectively.

[0036] It can be understood that the data ends are independent of each other means that the data transmitted by these data ends do not affect each other, and the data transmitted by these data ends can reach the same processing unit and be processed by the unified processing unit.

[0037] In some examples, the power supply ends of the encoder interfaces 11 may also be independent of each other, so that the encoder 3 can be powered and controlled separately. In some examples, the power supply ends of the encoder interfaces 11 may also be connected to each other, that is, the negative electrodes 115 of the power supply ends of the encoder interfaces 11 are connected to each other, and the positive electrodes 116 of the power supply ends of the encoder interfaces 11 are connected to each other, so that the power supply is controlled through a power output end inside the motor driver 1.

[0038] In some embodiments, Figure 4 As shown, the motor driver 1 includes at least two encoder interfaces 11, each of which is provided with a power supply terminal. At least two encoder interfaces 11 mean that one motor driver 1 can be connected to at least two encoders 3 at the same time, and these encoders 3 can all be connected to the backup power supply 2 through the motor driver 1, which is easy to manage. In practical applications, multiple encoders 3 connected to a single motor driver 1 may all be provided in one motor 4, or may be provided in different motors 4 respectively.

[0039] In some examples, the motor driver 1 may be a multi-axis motor driver 1, that is, it may control multiple motors 4. Figure 5As shown, the motor driver 1 also includes a power cable interface 13, and the power cable interface 13 is used to connect the power cable 41 of the motor 4. When the motor driver 1 is a multi-axis motor driver 1, it may have more than one power cable interface 13, and each power cable interface 13 may be used to connect a motor 4. In some embodiments, the number of power cable interfaces 13 of the motor driver 1 is greater than or equal to the number of encoder interfaces 11. When a part of the motor 4 may not use the encoder 3, the number of power cable interfaces 13 may be set to be greater than the number of encoder interfaces 11 to avoid wasting the encoder interfaces 11. In some implementation processes, the number of power cable interfaces 13 and encoder interfaces 11 of the motor driver 1 is the same, and can be paired one by one.

[0040] In some embodiments, when the motor driver 1 includes at least two encoder interfaces 11 and at least two power terminals, the input ends of the power terminals can be connected to each other and to the encoder power supply interface 12. Specifically, Figure 6 As shown, the input end of the power terminal includes a positive pole and a negative pole. The positive poles of the input end of the power terminal in this embodiment are connected to each other and electrically connected to the positive pole of the encoder power supply interface 12, and the negative poles of the input end of the power terminal are connected to each other and electrically connected to the negative pole of the encoder power supply interface 12.

[0041] like Figure 6 As shown, since the power terminals are interconnected, a single encoder power supply interface 12 will simultaneously form an electrical connection with these interconnected power terminals, so only one backup power supply 2 needs to be connected to the encoder power supply interface 12 to provide backup power supply to at least two encoders 3 (each encoder interface 11 can be connected to an encoder 3). This reduces the number of backup power supplies 2, further reduces the number of cables and space occupied in the automation equipment, and facilitates the maintenance of the backup power supply 2. For example, when all the power terminals in the motor driver 1 are interconnected, the motor driver 1 can be provided with only one encoder power supply interface 12, and the backup power supply to all encoders 3 connected to the motor driver 1 can be realized through one backup power supply 2.

[0042] It should be noted that in the present application, both the power terminal and the power supply terminal are ports for providing power to the encoder 3. Among them, the power terminal is a port connected to the encoder power supply interface 12, which is used to realize the connection between the encoder 3 and the backup power supply 2. The power supply terminal is connected to the internal power supply of the motor driver 1, and is used to provide power to the encoder 3 under normal circumstances when the motor driver 1 is not powered off. In this embodiment, the power supply terminal is not electrically connected to the encoder power supply interface 12, and the power supply source of the power supply terminal can be the input power connected to the motor driver 1 after power conversion.

[0043] In the present embodiment, the number of encoder power supply interfaces 12 provided on the motor driver 1 may be one or more than one, wherein at least one encoder power supply interface 12 is used to connect to the backup power supply 2. The connection between the encoder power supply interface 12 and the backup power supply 2 may be a direct connection or an indirect connection. When the encoder power supply interface 12 is indirectly connected to the backup power supply 2, the encoder power supply interface 12 may be connected to other motor drivers 1 to connect to the backup power supply 2 through other motor drivers 1. When the number of encoder power supply interfaces 12 is one, the encoder power supply interface 12 may be used to connect to the backup power supply 2. When the number of encoder power supply interfaces 12 is more than one, multiple different backup power supplies 2 may be connected at the same time to improve the battery life and the redundant backup power supply 2 will further improve the stability of the automation equipment. In the present embodiment, the encoder power supply interfaces 12 are interconnected, for example Figure 7 As shown in , when the motor driver 1 has two encoder power supply interfaces 12, the two encoder power supply interfaces 12 are connected together in parallel, that is, the ends of the two encoder power supply interfaces 12 located inside the motor driver 1 are connected together.

[0044] When there are more than one encoder power supply interface 12, at least one encoder power supply interface 12 may be cascaded with other motor drivers 1. Figure 7 As shown, when at least two motor drivers 1 are cascaded, a single backup power supply 2 can be directly connected to the encoder power supply interface 12 of only one of the motor drivers 1, and the remaining motor drivers 1 can all be electrically connected to the backup power supply 2 based on the cascade of the encoder power supply interface 12. This will enable a single backup power supply 2 to provide backup power to the encoders 3 connected to at least two motor drivers 1. Figure 7 Only two motor drivers 1 are cascaded as an example. The motor driver 1 at the last level may have only one encoder power supply interface 12. In actual applications, more cascades can be performed. In this example, the motor driver 1 may be a single-axis motor driver 1, that is, it can be connected to a motor 4 and an encoder 3. When the motor drivers 1 are cascaded through the encoder power supply interface 12, the backup power supply 2 does not need to lead out multiple cables to connect each motor driver 1 separately, which will reduce the total length of the cables in some implementation processes.

[0045] As another example, multi-axis motor drivers 1 can also be cascaded, and the cascading method is similar to that of single-axis motor drivers 1. In this example, each motor driver 1 may include at least two encoder interfaces 11, and the input ends of the power terminals of each encoder interface 11 are interconnected. Therefore, the encoder 3 connected to a single motor driver 1 can be backed up by a backup power supply 2. Multiple motor drivers 1 can also be cascaded through the encoder power supply interface 12, and these motor drivers 1 can also be backed up by a backup power supply 2. It can be seen that this example uses a backup power supply 2 to complete the backup power supply for all encoders 3 connected to all motor drivers 1, greatly reducing the number of cables and the total length.

[0046] In practical applications, the multi-axis motor driver 1 and the single-axis motor driver 1 can also be cascaded.

[0047] It can be seen that at least two interconnected encoder power supply interfaces 12 are provided on the motor driver 1, which provides more flexible expansion possibilities. In some embodiments, the motor driver 1 can be provided with two interconnected encoder power supply interfaces 12, which has a certain degree of flexible expandability while avoiding the cost increase and structural waste caused by too many interfaces.

[0048] In the present application, the backup power supply 2 refers to other power supplies different from the internal power supply of the motor driver 1, which can be, for example, an energy storage system or a common energy storage device such as a battery.

[0049] For ease of management, Figure 8 As shown, in some embodiments, the motor driver 1 further includes a battery box 14, which is used to connect to the encoder power supply interface 12, so that the battery disposed therein can simultaneously supply power to the power supply terminal connected to the encoder power supply interface 12. The battery box 14 can be fixedly disposed on the motor driver 1, or can be a detachable component. By providing backup power through the battery and the battery box 14, in some implementation processes, the backup power supply 2 can be disposed on the motor driver 1 or on a cable, and can be disposed closer to the encoder power supply interface 12, thereby helping to reduce the wiring length between the encoder power supply interface 12 and the battery box 14.

[0050] In some embodiments, the motor driver 1 includes a housing, on which a connection structure for connecting a battery box 14 is provided, and the battery box 14 is detachably fixed to the housing through the connection structure. The connection structure may include, but is not limited to, a slide rail, a buckle, a screw connection structure, etc., and accordingly, the battery box 14 may be provided with a structure that corresponds to the connection structure. When a backup power supply is required, the battery is set in the battery box 14, and the battery box 14 is fixed to the housing of the motor driver 1 through the connection structure. If the backup power supply is not required, the battery box 14 can be removed from the housing to save space. And the detachable battery box 14 makes it unnecessary to reserve a position for installing the battery when designing the motor driver 1, so that its structure can be determined more flexibly, which also contributes to the miniaturized design.

[0051] In some embodiments, the motor driver 1 further includes a connecting line 21, which can detachably connect the battery box 14 and the encoder power supply interface 12. Taking the backup power supply 2 as a battery as an example, see again Figure 8 One end of the connecting line 21 is connected to the output interface of the battery box 14, and the other end is connected to the encoder power supply interface 12. In some examples, the connecting line 21 and the encoder power supply interface 12 are connected through a pluggable terminal for easy disassembly and assembly.

[0052] This embodiment also provides an automation device, which includes the motor driver 1 of the above example, a motor 4 connected to the motor driver 1, and a backup power supply 2, wherein the backup power supply 2 is connected to the encoder power supply interface 12 of the motor driver 1. The number of motor drivers 1 can be one or more; the motor driver 1 can be a single-axis motor driver 1 or a multi-axis motor driver 1; the number of motors 4 is at least one; the backup power supply 2 can be a battery box 14 provided on the motor driver 1, or can be other power supply devices provided at other locations and connected to the motor driver 1.

[0053] In some embodiments, the automation device includes at least two motor drivers 1, and at least one motor driver 1 includes two encoder power supply interfaces 12. The encoder power supply interfaces 12 of at least two motor drivers 1 are directly or indirectly connected to the same backup power supply 2.

[0054] For example, when the automation device includes at least two motor drivers 1, the encoder power supply interfaces 12 of the motor drivers 1 can be cascaded. A connection method of the motor drivers 1 can be referred to in Figure 7 As shown; one of the motor drivers 1 has two encoder power supply interfaces 12, and the two encoder power supply interfaces 12 are connected to each other, so that they are both connected to the same backup power supply 2. Figure 7In the embodiment, the other motor driver 1 is provided with only one encoder power supply interface 12, and the encoder power supply interfaces 12 of the two motor drivers 1 are connected in a cascade manner, so as to share the same backup power supply 2. It can be seen that the automation equipment can use the same backup power supply 2 to provide backup power to the encoders 3 connected to at least two motor drivers 1, greatly reducing the number and total length of cables, and reducing the number of backup power supplies 2, which is convenient for the maintenance and management of the backup power supply 2.

[0055] In the automation device of this embodiment, by providing an encoder power supply interface 12 on the motor driver 1 and connecting it to the power supply terminal of the backup power supply in the encoder interface 11, the encoder 3 of the motor 4 can be connected to the power supply terminal through the encoder cable 31, and connected to the backup power supply 2 through the encoder power supply interface 12. There is no need to provide a separate cable from the backup power supply 2 to directly connect to the encoder 3 of the motor 4, so in some implementation processes, the number of cables that need to be connected between the motor driver 1 and the motor 4 is reduced, which facilitates the management of cables of the automation equipment, helps to optimize the spatial layout of the automation equipment, and improves the reliability of the automation equipment.

[0056] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made according to the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A motor driver, characterized in that: include: An encoder interface, used to connect an encoder, the encoder interface comprising a power supply terminal for providing backup power to the encoder; An encoder power supply interface, wherein the encoder power supply interface is electrically connected to the power supply terminal.

2. The motor driver according to claim 1, characterized in that: The motor driver includes at least two encoder interfaces, and each encoder interface is provided with the power supply terminal.

3. The motor driver according to claim 2, characterized in that: The motor driver further comprises power cable interfaces, and the number of the power cable interfaces is greater than or equal to the number of the encoder interfaces.

4. The motor driver according to claim 2, characterized in that: The input ends of the power terminals are connected to each other, and the output ends of the power terminals are used to connect the encoder cable; wherein the positive poles of the input ends are connected to each other and electrically connected to the positive pole of the encoder power supply interface, and the negative poles of the input ends are connected to each other and electrically connected to the negative pole of the encoder power supply interface.

5. The motor driver according to claim 2, characterized in that: The encoder interface also includes a power supply terminal and a data terminal, and the data terminals in different encoder interfaces are independent.

6. The motor driver according to claim 1, characterized in that: It comprises two encoder power supply interfaces connected to each other, at least one of which is used to connect a backup power supply.

7. The motor driver according to any one of claims 1 to 6, characterized in that: The motor driver comprises a battery box, and the battery box is used to be connected to the encoder power supply interface so that the battery arranged therein supplies power to the encoder power supply interface.

8. The motor driver according to claim 7, characterized in that: The motor driver comprises a housing, on which a connection structure for connecting the battery box is arranged, and the battery box is detachably fixed to the housing through the connection structure.

9. An automated device, characterized in that: It comprises the motor driver according to any one of claims 1 to 8, and a motor and a backup power supply connected to the motor driver, wherein the backup power supply is connected to an encoder power supply interface of the motor driver.

10. The automation device according to claim 9, characterized in that: The automation equipment includes at least two motor drivers, and at least one of the motor drivers includes two encoder power supply interfaces, and the encoder power supply interfaces of the at least two motor drivers are directly or indirectly connected to the same backup power supply.

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