Time-sharing control system of servo driver

Abstract

The utility model provides a time-sharing control system for a servo driver, which comprises a main driving branch and a time-sharing control branch, in the main driving branch, a first driving signal input end of the servo driver is used for acquiring control parameters corresponding to a first motor, and a second driving signal input end of the servo driver is used for acquiring control parameters corresponding to a second motor; a driving power supply output end of the servo driver is connected to a first alternating current contactor and a second alternating current contactor, the first alternating current contactor is connected to a first motor, and the second alternating current contactor is connected to a second motor; in the time-sharing control branch, the power supply end of a first alternating-current contactor is connected to the normally-open end of a first intermediate relay, the power supply end of a second alternating-current contactor is connected to the normally-open end of a second intermediate relay, and the input end of the first intermediate relay is connected to the normally-open end of a main control relay; and the input end of the second intermediate relay is connected to the normally closed end of the main control relay. According to the utility model, the utilization rate of the servo driver can be improved and the cost of the servo driver can be reduced.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of servo control, and in particular to a servo drive time-sharing control system. Background Art

[0002] Servo drive is a commonly used drive technology in industrial production processes. This technology uses servo drives to drive motors, causing the motors to perform actions in a given manner, thereby performing industrial production. In the existing technology, users often equip each motor with a dedicated servo drive, and each servo drive is dedicated to controlling the actions of the corresponding motor. However, during the production process, some motors operate asynchronously, that is, the two motors do not work simultaneously. Instead, one motor performs the corresponding action and then the other motor performs the next action. In this case, configuring a servo drive for each motor will, on the one hand, incur unnecessary costs for users, and on the other hand, because the two motors do not work simultaneously, the corresponding servo drives do not work simultaneously either. This will result in the servo drives not being fully utilized, resulting in a waste of resources. Utility Model Content

[0003] The main purpose of the embodiment of the utility model is to propose a servo drive time-sharing control system, which can drive two motors in a time-sharing manner through one servo drive. For two motors working asynchronously, the user only needs to configure one servo drive, thereby improving the utilization rate of the servo drive and reducing the cost.

[0004] To achieve the above objectives, the present invention provides a servo drive time-sharing control system, comprising:

[0005] A main drive branch, the main drive branch includes a first motor, a second motor, a first AC contactor, a second AC contactor and a servo driver, the servo driver includes a first drive signal input terminal, a second drive signal input terminal and a drive power output terminal, the first drive signal input terminal is used to obtain a control parameter corresponding to the first motor, the second drive signal input terminal is used to obtain a control parameter corresponding to the second motor, the power supply terminal of the first motor is connected to the three-phase power output terminal of the first AC contactor, the power supply terminal of the second motor is connected to the three-phase power output terminal of the second AC contactor, the three-phase power input terminal of the first AC contactor is connected to the drive power output terminal, and the three-phase power input terminal of the second AC contactor is connected to the drive power output terminal;

[0006] A time-sharing control branch includes a main control relay, a first intermediate relay, and a second intermediate relay. The main control relay includes a main control normally open terminal, a main control normally closed terminal, a first main control common terminal, a second main control common terminal, a first main control signal input terminal, and a second main control signal input terminal. The first main control signal input terminal is connected to the low-level signal output terminal of the servo driver, and the second main control signal input terminal is connected to the high-level signal output terminal of the servo driver. The main control normally open terminal is connected to the first signal input terminal of the first intermediate relay, the first main control common terminal is connected to the second signal input terminal of the first intermediate relay, the main control normally closed terminal is connected to the first signal input terminal of the second intermediate relay, and the second main control common terminal is connected to the second signal input terminal of the second intermediate relay. The normally open terminal of the first intermediate relay is connected to the first power supply terminal of the first AC contactor, the common terminal of the first intermediate relay is connected to the second power supply terminal of the first AC contactor, the normally open terminal of the second intermediate relay is connected to the first power supply terminal of the second AC contactor, and the common terminal of the second intermediate relay is connected to the second power supply terminal of the second AC contactor.

[0007] In some embodiments, a first power source is connected between the second power source terminal of the first AC contactor and the common terminal of the first intermediate relay, and the first power source is a 220V AC power source.

[0008] In some embodiments, the first power source is further connected between the second power supply terminal of the second AC contactor and the common terminal of the second intermediate relay.

[0009] In some embodiments, a second power supply is connected between the first main control common terminal of the main control relay and the second signal input terminal of the first intermediate relay, and the second power supply is a 24V AC power supply.

[0010] In some embodiments, the high-level signal output end of the servo driver is used to output a high-level signal to the master control relay. After receiving the high-level signal output from the high-level signal output end, the master control relay controls the conduction between the master control normally-open end and the first master control common end, so that the second power supply inputs a high-level signal to the first signal input end of the first intermediate relay and the second signal input end of the first intermediate relay.

[0011] In some embodiments, the normally-open end of the first intermediate relay and the common end of the first intermediate relay are turned on after the first intermediate relay receives a high-level signal.

[0012] In some embodiments, a third power supply is connected between the second main control common terminal of the main control relay and the second signal input terminal of the second intermediate relay, and the second power supply is a 24V AC power supply.

[0013] In some embodiments, the low-level signal output end of the servo driver is used to output a low-level signal to the master control relay. After receiving the low-level signal output by the low-level signal output end, the master control relay controls the conduction between the master control normally closed end and the second master control common end, so that the third power supply inputs a high-level signal to the first signal input end of the second intermediate relay and the second signal input end of the second intermediate relay.

[0014] In some embodiments, the normally-open terminal of the second intermediate relay and the common terminal of the second intermediate relay are turned on after the second intermediate relay receives a high-level signal.

[0015] In some embodiments, the servo drive further includes a first feedback signal receiving end, a second feedback signal receiving end and a feedback output end, the first AC contactor includes a first normally open end and a second normally open end, the second AC contactor includes a third normally open end and a fourth normally open end, the first normally open end and the third normally open end are both connected to the feedback output end, the second normally open end is connected to the first feedback signal receiving end, and the fourth normally open end is connected to the second feedback signal receiving end.

[0016] The embodiment of the present utility model proposes a servo drive time-sharing control system, including: a main drive branch, the main drive branch includes a first motor, a second motor, a first AC contactor, a second AC contactor and a servo drive, the servo drive includes a first drive signal input end, a second drive signal input end and a drive power output end, the first drive signal input end is used to obtain a control parameter corresponding to the first motor, the second drive signal input end is used to obtain a control parameter corresponding to the second motor, the power supply end of the first motor is connected to the three-phase power output end of the first AC contactor, the power supply end of the second motor is connected to the three-phase power output end of the second AC contactor, the three-phase power input end of the first AC contactor is connected to the drive power output end, and the three-phase power input end of the second AC contactor is connected to the drive power output end; a time-sharing control branch, the time-sharing control branch includes a main control relay, a first intermediate relay and a second intermediate relay, the main control relay includes a main A main control normally open end, a main control normally closed end, a first main control common end, a second main control common end, a first main control signal input end and a second main control signal input end, the first main control signal input end is connected to the low-level signal output end of the servo driver, the second main control signal input end is connected to the high-level signal output end of the servo driver, the main control normally open end is connected to the first signal input end of the first intermediate relay, the first main control common end is connected to the second signal input end of the first intermediate relay, the main control normally closed end is connected to the first signal input end of the second intermediate relay, the second main control common end is connected to the second signal input end of the second intermediate relay, the normally open end of the first intermediate relay is connected to the first power supply end of the first AC contactor, the common end of the first intermediate relay is connected to the second power supply end of the first AC contactor, the normally open end of the second intermediate relay is connected to the first power supply end of the second AC contactor, and the common end of the second intermediate relay is connected to the second power supply end of the second AC contactor. The embodiment of the utility model connects the two driving signal input terminals of the servo driver to the first motor and the second motor respectively, and connects the driving power output terminal of the servo driver to the three-phase power input terminal of the first AC contactor and the three-phase power input terminal of the second AC contactor respectively, the three-phase power output terminal of the first AC contactor is connected to the first motor, and the three-phase power output terminal of the second AC contactor is connected to the second motor, and then controls the on and off of the first AC contactor and the second AC contactor through a time-sharing control branch. When the servo driver outputs a signal to the main control relay through the high-level signal output terminal, the main control normally open terminal and the first main control common terminal of the main control relay are connected, the first intermediate relay receives the high-level signal, and the normally open terminal and the common terminal of the first intermediate relay are connected, thereby closing the first AC contactor. At this time, the first AC contactor is turned on and the second AC contactor is disconnected, and the servo driver is used to drive the first motor.Similarly, when the servo driver outputs a low-level signal, the second AC contactor turns on, while the first AC contactor turns off, allowing the servo driver to drive the second motor. This allows a single servo driver to drive both motors in a time-sharing manner. This means users only need to configure one servo driver for both asynchronous motors, reducing costs and increasing servo driver utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a circuit topology diagram of a servo drive time-sharing control system disclosed in an embodiment of the utility model;

[0018] Figure 2 This is another circuit topology diagram of a servo drive time-sharing control system disclosed in an embodiment of the utility model. DETAILED DESCRIPTION

[0019] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present invention, and should not be understood as limiting the embodiments of the present invention.

[0020] In the description of the embodiments of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0021] In the description of the embodiments of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0022] In the description of the embodiments of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the embodiments of the present invention based on the specific content of the technical solution.

[0023] Reference Figure 1 , Figure 11 is a circuit diagram of a servo drive 105 time-sharing control system provided by an embodiment of the present invention. The servo drive 105 time-sharing control system includes:

[0024] A main drive branch, the main drive branch includes a first motor 101, a second motor 102, a first AC contactor 103, a second AC contactor 104 and a servo driver 105, the servo driver 105 includes a first drive signal input terminal, a second drive signal input terminal and a drive power output terminal, the first drive signal input terminal is used to obtain a control parameter corresponding to the first motor, the second drive signal input terminal is used to obtain a control parameter corresponding to the second motor, the power supply terminal of the first motor 101 is connected to the three-phase power output terminal of the first AC contactor 103, the power supply terminal of the second motor 102 is connected to the three-phase power output terminal of the second AC contactor 104, the three-phase power input terminal of the first AC contactor 103 is connected to the drive power output terminal, and the three-phase power input terminal of the second AC contactor 104 is connected to the drive power output terminal;

[0025] The time-sharing control branch includes a main control relay 106, a first intermediate relay 107 and a second intermediate relay 108. The main control relay 106 includes a main control normally open terminal NO1, a main control normally closed terminal NC1, a first main control common terminal Co1, a second main control common terminal Co2, a first main control signal input terminal and a second main control signal input terminal. The first main control signal input terminal is connected to the low-level signal output terminal S_l of the servo driver 105, and the second main control signal input terminal is connected to the high-level signal output terminal S_h of the servo driver 105. The main control normally open terminal NO1 is connected to the first signal input terminal of the first intermediate relay 107, and the first master common terminal Co1 is connected to the first intermediate relay 108. The second signal input terminal of the switch 107 is connected to the second signal input terminal of the switch 107, the main control normally closed terminal NC1 is connected to the first signal input terminal of the second intermediate relay 108, the second main control common terminal Co2 is connected to the second signal input terminal of the second intermediate relay 108, the normally open terminal NO2 of the first intermediate relay 107 is connected to the first power supply terminal of the first AC contactor 103, the common terminal Co3 of the first intermediate relay 107 is connected to the second power supply terminal of the first AC contactor 103, the normally open terminal NO3 of the second intermediate relay 108 is connected to the first power supply terminal of the second AC contactor 104, and the common terminal Co4 of the second intermediate relay 108 is connected to the second power supply terminal of the second AC contactor 104.

[0026] In the embodiment of the present invention, the servo driver 105 is respectively provided with a first drive signal input terminal for obtaining control parameters corresponding to the first motor and a second drive signal input terminal for obtaining control parameters corresponding to the second motor. These control parameters are used to control the parameters of the current or voltage output by the servo driver to the corresponding motor. For example, referring to Figure 1, the first drive signal input terminal is connected to the first motor 101, and the second drive signal input terminal is connected to the second motor 102. Specifically, it is connected to the sensor in the corresponding motor for detecting the torque, angle or speed of the motor shaft. Based on this, the actual torque, angle or speed of the corresponding motor can be detected, and the corresponding control parameters can be generated as the input of the servo driver, so as to adjust the amount of electric energy output by the power output terminal of the servo driver; in another embodiment, the first drive signal input terminal and the second drive signal input terminal may not be connected to the first motor and the second motor, but directly obtain the external input control parameters to adjust the amount of electric energy output by the power output terminal of the servo driver; the drive power output terminal of the servo driver 105 is respectively connected to the three-phase power input terminal of the first AC contactor 103 and the three-phase power input terminal of the second AC contactor 104, and the first AC contactor 10 3 is connected to the first motor 101, and the three-phase power output end of the second AC contactor 104 is connected to the second motor 102; at the same time, by connecting the high-level signal output end S_h and the low-level signal output end S_l of the servo driver 105 to the main control relay 106, the main control normally open end NO1 and the first main control common end Co1 of the main control relay 106 are respectively connected to the two signal input ends of the first intermediate relay 107, the main control normally closed end NC1 and the second main control common end Co2 of the main control relay 106 are respectively connected to the two signal input ends of the second intermediate relay 108, the normally open end NO2 and the common end Co3 of the first intermediate relay 107 are respectively connected to the two power supply ends of the first AC contactor 103, and the normally open end NO3 and the common end Co4 of the second intermediate relay 108 are respectively connected to the two power supply ends of the second AC contactor 104.When the main control relay 106 receives a high-level signal, the main control normally-open terminal NO1 and the first main control common terminal Co1 are connected, and the main control normally-closed terminal NC1 and the second main control common terminal Co2 are disconnected; when the main control relay 106 receives a low-level signal or does not receive any drive signal, the main control normally-closed terminal NC1 and the second main control common terminal Co2 are connected, and the main control normally-open terminal NO1 and the first main control common terminal Co1 are disconnected. In this way, when the main control relay 106 receives a high-level signal from the servo driver 105, the main control normally-open terminal NO1 and the first main control common terminal Co1 are connected, and a drive voltage is output to the first intermediate relay 107, so that the normally-open terminal NO2 of the first intermediate relay 107 and the common terminal Co3 are connected, thereby inputting a drive signal between the two power input terminals of the first AC contactor 103, so that the contacts of the first AC contactor 103 are closed, and the first AC contactor 103 is closed. The three-phase power input terminal and the three-phase power output terminal of the servo driver 103 are turned on, and the driving power output terminal of the servo driver 105 is connected to the power terminal of the first motor 101, thereby driving the first motor 101 through the servo driver 105; when the main control relay 106 receives a low-level signal from the servo driver 105, the main control normally closed terminal NC1 and the second main control common terminal Co2 are turned on, and a driving voltage is output to the second intermediate relay 108, so that the normally open terminal NO3 and the common terminal Co4 of the second intermediate relay 108 are turned on, thereby inputting a driving signal between the two power input terminals of the second AC contactor 104, so that the contacts of the second AC contactor 104 are closed, the three-phase power input terminal and the three-phase power output terminal of the second AC contactor 104 are turned on, and the driving power output terminal of the servo driver 105 is connected to the power terminal of the second motor 102, thereby driving the second motor 102 through the servo driver 105. Based on this, the servo driver 105 outputs a high level signal or a low level signal to the main control relay 106 through the high level signal output terminal S_h and the low level signal output terminal to switch the motor driven by the servo driver 105, thereby driving the two motors in a time-sharing manner through the servo driver 105.

[0027] It should be noted that, in some embodiments, the first master common terminal Co1 and the second master common terminal Co2 of the master control relay 106 may be physically the same port. When the master control relay 106 does not receive a high-level signal, the port is connected to the master normally closed terminal NC1 and disconnected from the master normally open terminal NO1. When the master control relay 106 receives a high-level signal, the port is connected to the master normally open terminal NO1 and disconnected from the master normally closed terminal NC1.

[0028] In one embodiment, the first motor 101 and the second motor 102 may be motors of different types. For example, the first motor 101 is a hydraulic servo motor, and the second motor 102 is a melt-melting motor.

[0029] Reference Figure 2In some embodiments, a first power source AC1 is connected between the second power source terminal of the first AC contactor 103 and the common terminal Co3 of the first intermediate relay 107. The first power source AC1 is a 220V AC power source. The first and second power source terminals of the first AC contactor 103 actually serve as controlled terminals of the first AC contactor 103. The input voltage between the first and second power source terminals of the first AC contactor 103 determines whether the contacts of the first AC contactor 103 are closed. When the voltage input between the first and second power source terminals of the first AC contactor 103 reaches a certain threshold, the contacts of the first AC contactor 103 are closed, thereby connecting the three-phase voltage input and three-phase voltage output terminals of the first AC contactor 103. This connects the first drive signal input terminal of the servo driver 105 to the power source terminal of the first motor 101, thereby establishing a conductive circuit between the servo driver 105 and the first motor 101. In order for the normally open terminal NO2 and the common terminal Co3 of the first intermediate relay 107 to be turned on so that the contacts of the first AC contactor 103 are closed, it is necessary to ensure that the voltage input between the first power supply terminal and the second power supply terminal of the first AC contactor 103 is large enough. At this time, if the electric energy in the circuit of the first intermediate relay 107 and the first AC contactor 103 is small, it is not enough to drive the contacts of the first AC contactor 103 to close. Based on this, in this embodiment, a 220V AC power supply is connected between the second power supply terminal of the first AC contactor 103 and the common terminal Co3 of the first intermediate relay 107. At this time, when the first intermediate relay 107 receives the corresponding control signal to connect the normally open terminal NO2 and the common terminal Co3, one end of the first power supply AC1 is directly connected to the first power supply terminal of the first AC contactor 103, and the other end of the first power supply AC1 is connected to the second power supply terminal of the first AC contactor 103 through the conductive common terminal NO2 and the normally open terminal Co3, thereby outputting a 220V voltage between the first power supply terminal and the second power supply terminal of the first AC contactor 103, thereby driving the contacts of the first AC contactor 103 to close, so that the circuit between the servo driver 105 and the first motor 101 is connected, and the servo driver 105 can output a drive signal to the first motor 101 through the first drive signal input terminal, thereby driving the first motor 101.

[0030] Reference Figure 2In some embodiments, the first power source AC1 is further connected between the second power supply terminal of the second AC contactor 104 and the common terminal Co4 of the second intermediate relay 108 . It can be understood that, referring to the above description, since the electric energy between the second intermediate relay 108 and the second AC contactor 104 may not be sufficient to drive the contacts of the second AC contactor 104 to close, it is necessary to connect a 220-volt power supply between the second AC contactor 104 and the second intermediate relay 108. Since the first motor 101 and the second motor 102 are driven in a time-sharing manner, the normally open end NO2 and the common end Co3 of the first intermediate relay 107, and the normally open end NO3 and the common end Co4 of the second intermediate relay 108 will not be turned on at the same time, that is, the circuit between the first AC contactor 103 and the first intermediate relay 107, and the circuit between the second AC contactor 104 and the second intermediate relay 108 will not be turned on at the same time. Based on this, the first power supply AC1 can be directly connected between the second power supply end of the second AC contactor 104 and the common end Co4 of the second intermediate relay 108, so that the two circuits share the same 220-volt power supply, thereby reducing costs.

[0031] Reference Figure 2In some embodiments, a second power source AC2 is connected between the first master control common terminal Co1 of the master control relay 106 and the second signal input terminal of the first intermediate relay 107. The second power source AC2 is a 24V AC power source. It will be appreciated that the operating principle of the first intermediate relay 107 is similar to that of a contactor. When insufficient drive voltage is received between the first signal input terminal and the second signal input terminal of the first intermediate relay 107, the normally open terminal NO2 of the first intermediate relay 107 and the common terminal Co3 are disconnected. To connect the normally open terminal NO2 of the first intermediate relay 107 and the common terminal Co3, a sufficient voltage difference must be generated between the first signal input terminal and the second signal input terminal of the first intermediate relay 107. In this embodiment, the first signal input terminal of the first intermediate relay 107 is connected to the main control normally-open terminal NO1 of the main control relay 106, and the second signal input terminal of the first intermediate relay 107 is connected to the first main control common terminal Co1 of the main control relay 106. When the main control normally-open terminal NO1 and the first main control common terminal Co1 are conductive, the circuit between the first intermediate relay 107 and the main control relay 106 is conductive. At this time, the electrical energy in the circuit may be insufficient to drive the normally-open terminal NO2 of the first intermediate relay 107 and the common terminal Co3 to conduct. Based on this, in this embodiment, a 24V power supply is connected between the first main control common terminal Co1 of the main control relay 106 and the second signal input terminal of the first intermediate relay 107 to ensure that when the circuit between the main control relay 106 and the first intermediate relay 107 is conductive, the voltage difference between the first signal input terminal and the second signal input terminal of the first intermediate relay 107 is large enough to drive the normally-open terminal NO2 of the first intermediate relay 107 and the common terminal Co3 to conduct.

[0032] In some embodiments, when the servo driver 105 outputs a high-level signal to the master control relay 106 through the high-level signal output terminal S_h, the high-level signal is used as a driving signal of the master control relay 106, so that the normally closed terminal NC1 of the master control relay 106 is disconnected from the second master control common terminal Co2, and the master control normally open terminal NO1 is connected to the first master control common terminal Co1. At this time, one end of the second power supply AC2 is connected to the second signal input terminal of the first intermediate relay 107, and the other end is connected to the first intermediate relay 107 after passing through the first master control common terminal Co1 and the master control normally open terminal NO1. The first signal input terminal of the relay 107 outputs a high-level signal to the first intermediate relay 107, so that the normally open terminal NO2 and the common terminal Co3 of the first intermediate relay 107 are turned on. At this time, referring to the above description, when the normally open terminal NO2 and the common terminal Co3 of the first intermediate relay 107 are turned on, the first power supply AC1 outputs a 220V voltage to the first AC contactor 103, driving the contacts of the first AC contactor 103 to close, so that the circuit between the servo driver 105 and the first motor 101 is turned on, and the first motor 101 is driven by the servo driver 105.

[0033] Reference Figure 2 In some embodiments, a third power source AC3 is connected between the second master control common terminal Co2 of the master control relay 106 and the second signal input terminal of the second intermediate relay 108. The second power source AC2 is a 24V AC power source. The third power source AC3 is used to generate a sufficient driving voltage between the first signal input terminal and the second signal input terminal of the second intermediate relay 108 when the master control normally closed terminal NC1 and the second master control common terminal Co2 of the master control relay 106 are conductive. Details of the third power source AC3 can be found in the description of the second power source AC2 above and are not further elaborated here.

[0034] In some embodiments, when the servo driver 105 outputs a low-level signal to the master control relay 106 through the low-level signal output terminal S_1, the normally closed terminal NC1 of the master control relay 106 and the second master control common terminal Co2 are connected, and the third power supply AC3 applies a 24-volt high-level signal to both ends of the second intermediate relay 108. After the second intermediate relay 108 receives the high-level signal, the normally open terminal NO3 and the common terminal Co4 of the second intermediate relay 108 are connected, thereby applying a 220-volt drive voltage between the two power terminals of the second AC contactor 104 through the first power supply AC1, so that the contacts of the second AC contactor 104 are closed. At this time, the circuit between the servo driver 105 and the second motor 102 is connected, thereby driving the second motor 102 through the servo driver 105.

[0035] In some embodiments, the servo driver 105 also includes a first feedback signal receiving end, a second feedback signal receiving end and a feedback output end, the first AC contactor 103 includes a first normally open end and a second normally open end, the second AC contactor 104 includes a third normally open end and a fourth normally open end, the first normally open end and the third normally open end are both connected to the feedback output end, the second normally open end is connected to the first feedback signal receiving end, and the fourth normally open end is connected to the second feedback signal receiving end. When the contacts of the first AC contactor 103 are not closed, the first normally open end and the second normally open end are disconnected. When the first AC contactor 103 receives a driving voltage and closes the contacts, the first normally open end and the second normally open end are connected. At this time, a conductive loop is formed between the first feedback signal receiving end, the first normally open end, the second normally open end, and the feedback output end. The servo driver 105 outputs a feedback signal through the feedback output end, and transmits the feedback signal to the first feedback signal receiving end via the first normally open end and the second normally open end, so that the servo driver 105 can determine that the contacts of the first AC contactor 103 are currently closed, and the servo driver 105 is used to drive the first motor 101. Similarly, when the contacts of the second AC contactor 104 are closed, the third normally open end and the fourth normally open end are connected, and the loop between the second feedback signal receiving end, the third normally open end, the fourth normally open end, and the feedback output end is connected. The servo driver 105 can receive a feedback signal from the second feedback signal receiving end, thereby determining that the servo driver 105 is currently driving the second motor 102.

[0036] The embodiments described in the embodiments of the present invention are intended to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute a limitation on the technical solutions provided by the embodiments of the present invention. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

[0037] It will be understood by those skilled in the art that Figures 1 to 2 The technical solutions shown in the figures do not constitute a limitation on the embodiments of the present invention, and may include more or fewer components than shown in the figures, or combine certain components, or different components.

[0038] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The preferred embodiments of the embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of rights of the embodiments of the present invention is not limited thereby. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and essence of the embodiments of the present invention should be within the scope of rights of the embodiments of the present invention.

Claims

1. A servo drive time-sharing control system, characterized in that: include: A main drive branch, the main drive branch includes a first motor, a second motor, a first AC contactor, a second AC contactor and a servo driver, the servo driver includes a first drive signal input terminal, a second drive signal input terminal and a drive power output terminal, the first drive signal input terminal is used to obtain a control parameter corresponding to the first motor, the second drive signal input terminal is used to obtain a control parameter corresponding to the second motor, the power supply terminal of the first motor is connected to the three-phase power output terminal of the first AC contactor, the power supply terminal of the second motor is connected to the three-phase power output terminal of the second AC contactor, the three-phase power input terminal of the first AC contactor is connected to the drive power output terminal, and the three-phase power input terminal of the second AC contactor is connected to the drive power output terminal; A time-sharing control branch includes a main control relay, a first intermediate relay, and a second intermediate relay. The main control relay includes a main control normally open terminal, a main control normally closed terminal, a first main control common terminal, a second main control common terminal, a first main control signal input terminal, and a second main control signal input terminal. The first main control signal input terminal is connected to the low-level signal output terminal of the servo driver, and the second main control signal input terminal is connected to the high-level signal output terminal of the servo driver. The main control normally open terminal is connected to the first signal input terminal of the first intermediate relay, the first main control common terminal is connected to the second signal input terminal of the first intermediate relay, the main control normally closed terminal is connected to the first signal input terminal of the second intermediate relay, and the second main control common terminal is connected to the second signal input terminal of the second intermediate relay. The normally open terminal of the first intermediate relay is connected to the first power supply terminal of the first AC contactor, the common terminal of the first intermediate relay is connected to the second power supply terminal of the first AC contactor, the normally open terminal of the second intermediate relay is connected to the first power supply terminal of the second AC contactor, and the common terminal of the second intermediate relay is connected to the second power supply terminal of the second AC contactor.

2. The servo drive time-sharing control system according to claim 1, characterized in that: A first power supply is connected between the second power supply terminal of the first AC contactor and the common terminal of the first intermediate relay, and the first power supply is a 220V AC power supply.

3. The servo drive time-sharing control system according to claim 2, characterized in that: The first power supply is also connected between the second power supply terminal of the second AC contactor and the common terminal of the second intermediate relay.

4. The servo drive time-sharing control system according to claim 1, characterized in that: A second power supply is connected between the first main control common terminal of the main control relay and the second signal input terminal of the first intermediate relay, and the second power supply is a 24V AC power supply.

5. The servo drive time-sharing control system according to claim 4, characterized in that: The high-level signal output end of the servo driver is used to output a high-level signal to the main control relay. After receiving the high-level signal output by the high-level signal output end, the main control relay controls the conduction between the main control normally open end and the first main control common end, so that the second power supply inputs a high-level signal to the first signal input end of the first intermediate relay and the second signal input end of the first intermediate relay.

6. The servo drive time-sharing control system according to claim 5, characterized in that: The normally-open end of the first intermediate relay and the common end of the first intermediate relay are turned on after the first intermediate relay receives a high-level signal.

7. The servo drive time-sharing control system according to claim 1, characterized in that: A third power supply is connected between the second main control common terminal of the main control relay and the second signal input terminal of the second intermediate relay, and the second power supply is a 24V AC power supply.

8. The servo drive time-sharing control system according to claim 7, characterized in that: The low-level signal output end of the servo driver is used to output a low-level signal to the master control relay. After receiving the low-level signal output by the low-level signal output end, the master control relay controls the conduction between the master control normally closed end and the second master control common end, so that the third power supply inputs a high-level signal to the first signal input end of the second intermediate relay and the second signal input end of the second intermediate relay.

9. The servo drive time-sharing control system according to claim 8, characterized in that: The normally-open end of the second intermediate relay and the common end of the second intermediate relay are turned on after the second intermediate relay receives a high-level signal.

10. The servo drive time-sharing control system according to claim 1, characterized in that: The servo driver also includes a first feedback signal receiving end, a second feedback signal receiving end and a feedback output end, the first AC contactor includes a first normally open end and a second normally open end, the second AC contactor includes a third normally open end and a fourth normally open end, the first normally open end and the third normally open end are both connected to the feedback output end, the second normally open end is connected to the first feedback signal receiving end, and the fourth normally open end is connected to the second feedback signal receiving end.

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