CN211046752U - Power-on control circuit and motor integrated control device - Google Patents
Power-on control circuit and motor integrated control device Download PDFInfo
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- CN211046752U CN211046752U CN201921662070.8U CN201921662070U CN211046752U CN 211046752 U CN211046752 U CN 211046752U CN 201921662070 U CN201921662070 U CN 201921662070U CN 211046752 U CN211046752 U CN 211046752U
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Abstract
The application discloses power-on control circuit, power-on control circuit includes: the power supply input end is used for connecting an external alternating current power supply; at least two power output ends for respectively driving at least two motors to be driven; the rectifying circuit is connected with the power supply input end and is used for converting input alternating current into direct current; the buffer circuit is connected with the rectifying circuit and is used for carrying out buffer protection on the current output by the rectifying circuit; at least two drive circuit, connect buffer circuit and respectively with at least two power output end connect, compare in prior art, the circuit structure of the power-on control circuit that this application provided is more simplified, and the radiating effect is better.
Description
Technical Field
The present application relates to the field of integrated control, and in particular, to a power-on control circuit and a motor integrated control device.
Background
In the prior art, in order to solve the problem of power-on buffering of a frequency converter system, a relay and a buffer resistor are generally required to be added to charge a bus capacitor inside the frequency converter system, and for a plurality of frequency converter systems, a plurality of power-on buffer circuits or a total power-on buffer circuit is required, so that the system structure is more complicated, and meanwhile, the system structure volume and cost are also increased, so that a scheme capable of solving the technical problem is required.
SUMMERY OF THE UTILITY MODEL
The technical problem that this application mainly solved provides a simple structure and easily radiating last electric control circuit.
In order to solve the technical problem, the application adopts a technical scheme that: there is provided a power-on control circuit, comprising:
the power supply input end is used for connecting an external alternating current power supply;
at least two power output ends for respectively driving at least two motors to be driven;
the rectifying circuit is connected with the power supply input end and is used for converting input alternating current into direct current;
the buffer circuit is connected with the rectifying circuit and is used for carrying out buffer protection on the current output by the rectifying circuit;
and the at least two driving circuits are connected with the buffer circuit and are respectively connected with the at least two power output ends.
Further, the buffer circuit includes:
the first end of the energy storage filter circuit is connected with the output end of the rectifying circuit;
the input end of the switch circuit is connected with the second end of the energy storage filter circuit, and the output end of the switch circuit is connected to the negative bus terminal;
and the input end of the protection circuit is connected with the negative bus terminal, and the output end of the protection circuit is connected to the second end of the energy storage filter circuit.
Still further, the tank filter circuit comprises a capacitor, and/or the switching circuit comprises an IGBT switching circuit, and/or the circuit comprises a diode.
The driving circuit comprises a first output end and a second output end, the first output end of the driving circuit is connected with the motor to be driven so as to output a driving signal to the motor to be driven, and the second output end of the driving circuit is connected with the negative bus terminal;
when the energy storage filter circuit discharges, at least part of the energy storage filter circuit, the driving circuit and the protection circuit form a discharging loop.
Furthermore, the protection circuit comprises a plurality of diodes arranged in parallel, the input ends of the plurality of diodes are connected with the second output end of the driving circuit, and the output ends of the plurality of diodes are connected with the second end of the energy storage filter circuit.
The protection circuit further comprises a current-limiting resistor, one end of the current-limiting resistor is connected with the second end of the energy storage filter circuit, the other end of the current-limiting resistor is connected with the second output end of the driving circuit, and when the energy storage filter circuit discharges or charges to the state that the electric quantity is larger than a set threshold value, the switching circuit is disconnected to connect the current-limiting resistor into the discharging loop.
Further, the rectifying circuit comprises three groups of diode bridge arms, and the diode bridge arms comprise upper bridge diodes and lower bridge diodes.
Further, the rectification circuit comprises three groups of IGBT bridge arms, and the IGBT bridge arms comprise an upper bridge IGBT and a lower bridge IGBT.
Furthermore, the power-on control circuit further comprises a sampling circuit, and the sampling circuit is connected with the first output end of the driving circuit and the motor to be driven so as to sample the driving signal output to the motor to be driven.
In order to solve the technical problem, the application adopts a technical scheme that: the motor integrated control device comprises a controller and the power-on control circuit, wherein the controller is connected with the power-on control circuit and is used for sending a control instruction to the power-on control circuit, so that the power-on control circuit outputs a driving signal matched with the control instruction to a motor to be driven.
Compared with the prior art, the power-on control circuit provided by the application comprises a power input end, at least two power output ends, a rectifying circuit, a buffer circuit and at least two driving circuits, the structure of the power-on control circuit is simplified, and compared with the prior art, the power-on control circuit provided by the application is easier to dissipate heat, so that the safety of the power-on control circuit is improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a power-up control circuit according to the present application;
FIG. 2 is a schematic diagram of another embodiment of a power-up control circuit according to the present application;
FIG. 3 is a schematic diagram of a power-up control circuit according to another embodiment of the present application;
FIG. 4 is a schematic diagram of a power-up control circuit according to yet another embodiment of the present application;
fig. 5 is a schematic structural diagram of an embodiment of an integrated motor control device according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In current motor integrated control system, in order to solve the problem of power-on buffering of motor integrated control system, the form that adopts the increase relay charges drive part's bus capacitance among the motor integrated control system usually, when a motor integrated control system is used for a plurality of motors of external control, then can correspond and need to increase a plurality of relays and carry out the buffer protection, will cause circuit structure more complicated like this, in addition because the heat dissipation function of relay is relatively poor, and then will cause whole motor integrated control system's heat dissipation function relatively poor when the relay of a greater number.
It should be noted that, in the following description, much attention is paid to a hardware circuit structure in the motor integrated control system, that is, a circuit structure in the motor integrated control device, so that the motor integrated control system or the motor integrated control device is simply referred to as a motor integrated control circuit, the motor integrated control circuit is divided according to functions and includes a control circuit and a power-on control circuit, and in the current embodiment, a power-on control circuit is mainly described.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a power-on control circuit according to the present application. In the present embodiment, the power-on control circuit 100 provided in the present application is a part of an integrated control circuit, and is configured to provide power-on signals for at least the to-be-driven motor 151 and the to-be-driven motor 152 at the same time, and the power-on signals are motor driving signals that are converted from electric signals input by the external ac power source 101 under the control of the control circuit in the integrated control circuit and meet the requirements of the process and the motor parameters. The power-up control circuit 100 provided by the present application includes a power input (not shown), at least two power outputs (not shown), a rectifying circuit 110, a buffer circuit 120, and at least two driving circuits 130 and 140.
Wherein, the power input terminal (such as the power input terminal 204 illustrated in fig. 2) is used for connecting the external ac power 101.
The power-on control circuit 100 provided by the present application is configured to drive at least two motors 151 to be driven and motors 152 to be driven, so that at least two power output ends are configured to be respectively connected to the at least two motors 151 to be driven and the motors 152 to be driven, so as to drive the at least two motors 151 to be driven and the motors 152 to be driven. Specifically, the embodiment illustrated in fig. 1 is used for driving two motors 151 to be driven and two motors 152 to be driven, and it is understood that in other embodiments, the number of the motors to be driven that are driven by the power-on control circuit 100 is not limited, and may be specifically set and adjusted according to actual product requirements.
The rectifier circuit 110 is connected to an external ac power supply 101, and converts input ac power into dc power. Specifically, the rectifier circuit 110 converts low-voltage ac power input from the external ac power supply 101 into unidirectional pulsating dc power and outputs the dc power to the driver circuit 130 and the driver circuit 140.
The snubber circuit 120 is connected to the rectifier circuit 110, and is used to perform snubber protection on the current output from the rectifier circuit 110. In other words, the buffer circuit 120 is used to suppress the occurrence of transient overvoltage or the occurrence of an excessive voltage rise rate in the electrical signals input to the driving circuit 130 and the driving circuit 140, thereby protecting the circuits from being damaged.
The at least two driving circuits 130 and 140 are respectively connected to the buffer circuit 120, and output terminals of the at least two driving circuits 130 and 140 are respectively connected to the at least two power output terminals. The driving circuit 130 and the driving circuit 140 are configured to convert the electrical signals input to the driving circuit 130 and the driving circuit 140 into driving signals according to a set requirement under the control of a control circuit (not shown) in the integrated control device, and output the driving signals to the to-be-driven motor 151 and the to-be-driven motor 152 connected thereto respectively, so as to drive the connected motors to rotate to complete a set process flow.
The power-on control circuit provided by the embodiment corresponding to fig. 1 can suppress abnormal conditions such as excessive instantaneous overvoltage or voltage rise rate of an electric signal input to the driving circuit by providing the power-on control circuit including the buffer circuit, thereby avoiding components in the circuit from being damaged, realizing better protection of the circuit, realizing protection of multiple driving circuits by using one buffer circuit, simplifying the structure of the circuit and saving the investment of hardware cost.
Referring to fig. 2, fig. 2 is a schematic structural diagram of another embodiment of a power-on control circuit according to the present application. In the current embodiment, the buffer circuit 120 illustrated in fig. 1 includes a tank filter circuit 221, a switch circuit 223, and a protection circuit 222.
The first end of the energy storage filter circuit 221 is connected to the output end of the rectifying circuit 210, and is configured to store electric energy and filter an alternating current signal in an electric signal output by the rectifying circuit 210, so as to output a direct current signal to the driving circuit 230 and the driving circuit 240, respectively. Specifically, a first end of the tank filter circuit 221 is connected to the output end of the rectifying circuit 210, and a second end of the tank filter circuit 221 is connected to the protection circuit 222 and the switch circuit 223, respectively.
The input end of the switch circuit 223 is connected to the second end of the tank filter circuit 221, and the output end of the switch circuit 223 is connected to the negative bus terminal CD. The on/off of the switch circuit 223 is determined according to the operating state of the tank filter circuit 221, and is controlled by a control circuit (not shown in fig. 2). Specifically, when the energy storage filter circuit 221 is charged or the electric quantity is lower than a set value, the switch circuit 223 is controlled to be in an on state, and when the energy storage filter circuit 221 is discharged or the electric quantity is greater than a preset threshold value, the switch circuit 223 is controlled to be in an off state.
The input terminal of the protection circuit 222 is connected to the negative bus terminal CD, and the output terminal of the protection circuit 222 is connected to the second terminal of the tank filter circuit 221. It should be noted that, in the power-on control circuit 200 provided in the present application, a conductive line indicated by AB is defined as a positive bus, and a conductive line indicated by CD is defined as a negative bus.
The driving circuit 230 and the driving circuit 240 both include a first output end and a second output end, the first output end of the driving circuit 230 is connected to the motor M1 to be driven, so as to output a driving signal to the motor M1 to be driven, and further drive the motor M1 to be driven to rotate according to the process requirement; the first output end of the driving circuit 240 is connected to the motor M2 to be driven, so as to output a driving signal to the motor M2 to be driven, and further drive the motor M2 to be driven to rotate according to the process requirement. The second output terminals of the driver circuit 230 and the driver circuit 240 are connected to the negative bus terminal CD, wherein it should be noted that the second output terminals of the driver circuit 230 or the driver circuit 240 only have current flowing through the switch circuit 223 in the case of being opened.
Further, when the tank filter circuit 221 is discharged, at least a portion of the tank filter circuit 221, the driving circuit 230 and/or the driving circuit 240 and the protection circuit 222 may form a discharge loop, which may be specifically referred to as the description of the relevant portion in fig. 3.
In the power-on control circuit 200 corresponding to the embodiment shown in fig. 2, the rectifying circuit 210 rectifies an ac signal input by the external ac power supply 201 to obtain a unidirectional pulsating dc, and then the rectified dc is filtered by the energy storage filter circuit 221 to obtain a dc and output to the driving circuit 230 and the driving circuit 240. The electric signal output by the energy storage filter circuit 221 is converted into a driving signal meeting the process requirement and the motor parameter under the control of the control circuit, and is output to the to-be-driven motor M1 and the to-be-driven motor M2 which are connected with the electric signal, wherein the external control circuit can obtain the driving signal output to the to-be-driven motors M1 and M2 through sampling by the sampling circuit 202 or the sampling circuit 203.
Referring to fig. 3, fig. 3 is a schematic flow chart of another embodiment of a power-on control circuit 300 according to the present application. In the present embodiment, the tank filter circuit 321 includes a capacitor C1, and/or the switch circuit 323 includes an IGBT switch circuit K1, and/or the protection circuit 322 includes a diode D9.
Specifically, fig. 3 shows an embodiment in which the tank filter circuit 321 includes a capacitor C1, the switch circuit 323 includes an IGBT switch circuit K1, and the protection circuit 322 includes a diode D9. In the present embodiment, the input terminal of the IGBT switch circuit K1 is connected to the second terminal of the capacitor C1, and the output terminal of the IGBT switch circuit K1 is connected to the negative bus terminal CD.
The input end of the diode D9 is connected to the second end of the capacitor C1, and the output end of the diode D9 is connected to the negative bus terminal CD.
Further, with reference to fig. 3, in the embodiment illustrated in fig. 3, the protection circuit 322 includes a plurality of diodes arranged in parallel, specifically including diodes D9, D8, and D7 arranged in parallel, input terminals of the diodes D9, D8, and D7 arranged in parallel are connected to the second output terminals of the driving circuit 330 and the driving circuit 340, and output terminals of the diodes D9, D8, and D7 arranged in parallel are connected to the second terminal of the energy storage filter circuit 321, that is, connected to the second terminal of the capacitor C1, and are used to connect to a discharge loop when the capacitor C1 discharges, so as to perform circuit protection on the capacitor C1, and avoid breakdown caused by excessive current.
As described above, when the tank filter circuit 321 discharges, the protection circuit 322 and at least a portion of the tank filter circuit 321, the driver circuit 330, and/or the driver circuit 340 form a discharge loop. As illustrated in fig. 3, when the capacitor C1 is charged and then discharged, a discharge loop is formed by the capacitor C1, a part of IGBTs in the driving circuit 330 and/or the driving circuit 340, and at least a part of diodes in the protection circuit, and a current is output from the first end of the capacitor C1, flows through a part of the positive bus AB, then flows through the driving circuit 330 and the part of IGBTs in the driving circuit 340 to the negative bus CD, then flows through the negative bus CD to at least a part of diodes in the protection circuit 322, and then flows to the second end of the capacitor C1, so that a complete discharge loop is formed.
Further, with continued reference to fig. 3, the protection circuit 322 further includes a current limiting resistor R1. One end of the current limiting resistor R1 is connected with the second end of the energy storage filter circuit 321, the other end of the current limiting resistor R1 is connected with the second output ends of the driving circuit 330 and the driving circuit 340, and when the energy storage filter circuit 321 discharges or charges until the electric quantity is larger than a set threshold value, the switching circuit 323 is disconnected to connect the current limiting resistor R1 into a discharging loop, so that buffer protection is performed on the capacitor C1.
Further, with continued reference to fig. 3, the rectifier circuit 310 includes three sets of diode bridge arms arranged in parallel. The diode bridge arm comprises an upper bridge diode and a lower bridge diode. As illustrated in fig. 3, the diode D1 and the diode D2 form a diode bridge, the diode D3 and the diode D4 form a diode bridge, and the diode D5 and the diode D6 form a diode bridge, wherein the diode bridges are arranged in parallel.
In the embodiment illustrated in fig. 3, the redundant IGBT switch circuits and diodes in the driving unit may be directly connected to the buffer circuit, and form the buffer circuit together with the capacitor C1, and compared with the prior art in which an additional relay is required to be added, the technical scheme in the present application may directly utilize the original devices in the circuit to complete the arrangement of the buffer circuit, thereby simplifying the structure of the power-on control circuit. In addition, in the embodiment illustrated in fig. 3, the IGBT switch circuit K1 in the switch circuit 323 and/or the diode D9 in the protection circuit 322 may be disposed in close contact with the cooling structure like the IGBT arm in the driving circuit, and further, heat generated during operation of the device may be directly transferred to the cooling structure, which is better in heat dissipation effect than the power-on control circuit in the prior art.
Referring to fig. 4, fig. 4 is a schematic structural diagram of another embodiment of a power-on control circuit according to the present application. In the present embodiment, the rectifier circuit includes three sets of IGBT legs arranged in parallel. Each IGBT bridge arm comprises an upper bridge IGBT and a lower bridge IGBT. As illustrated in fig. 3, the upper IGBT T6 and the lower IGBT T7 form an IGBT leg, the upper IGBT T8 and the lower IGBT T9 form an IGBT leg, and the upper IGBT T10 and the lower IGBT T11 form an IGBT leg.
Referring to fig. 2 to fig. 4, the power-up control circuit provided in the present application further includes a sampling circuit. The sampling circuit 402 is connected with the first output end of the driving circuit 430 and the motor M1 to be driven to sample the driving signal output to the motor M1 to be driven, the sampling data output end of the sampling circuit 402 is connected to the control circuit to feed back the driving signal value obtained by sampling and output to the motor M1 to be driven to the control circuit for adjustment and monitoring of driving control, the sampling circuit 403 is connected with the first output end of the driving circuit 440 and the motor M2 to sample the driving signal output to the motor M2 to be driven, and the sampling data output end of the sampling circuit 403 is connected to the control circuit and is also used for feeding back the driving signal value obtained by sampling and output to the motor M2 to be driven to the control circuit for adjustment and monitoring of driving control.
Further, after the sampling circuit samples and obtains the driving signal, the sampled driving signal is further fed back to a control circuit in the motor integrated control device, and the control circuit is used for monitoring the driving signal value output to the motor to be driven in real time so as to adjust the driving control of the motor when needed.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of an integrated motor control device according to the present application. In the present embodiment, the motor integrated control apparatus 500 provided in the present application includes a controller 510 and a power-on control circuit 520.
The controller 510 is connected to the power-on control circuit 520, and is configured to send a control instruction to the power-on control circuit 510, so that the power-on control circuit 520 outputs a driving signal matched with the control instruction to the motor to be driven. The controller 510 may be a control circuit corresponding to that described above.
Further, the controller 510 includes at least a DSP control chip. It is understood that in other embodiments, the controller 510 may include other types of chips, or may also include other types of chips, specifically configured and adjusted according to the needs of the actual product.
Further, the integrated motor control device 500 provided by the present application may further include a sensing component (not shown), an output end of the sensing component is connected to the controller, and a sensing end of the sensing component is connected to or in contact with an actual motor or a side of a product operated by the motor, so as to obtain a parameter of the motor during actual operation or a related parameter in the product. If the controlled motor is a motor in a circular weaving machine, the sensing assembly at least comprises a tension sensor for acquiring the tension in the warp or the cylinder cloth and feeding the tension back to the controller. It should be noted that the motor integrated control device 500 provided in the present application may be at least used for integrated control of the circular weaving machine and the wire drawing machine, but is not limited to be used only for integrated control of the circular weaving machine and the wire drawing machine.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A power-on control circuit, comprising:
the power supply input end is used for connecting an external alternating current power supply;
at least two power output ends for respectively driving at least two motors to be driven;
the rectifying circuit is connected with the power supply input end and is used for converting input alternating current into direct current;
the buffer circuit is connected with the rectifying circuit and is used for carrying out buffer protection on the current output by the rectifying circuit;
and the at least two driving circuits are connected with the buffer circuit and are respectively connected with the at least two power output ends.
2. The power-on control circuit according to claim 1, wherein the buffer circuit comprises:
the first end of the energy storage filter circuit is connected with the output end of the rectifying circuit;
the input end of the switch circuit is connected with the second end of the energy storage filter circuit, and the output end of the switch circuit is connected to the negative bus terminal;
and the input end of the protection circuit is connected with the negative bus terminal, and the output end of the protection circuit is connected to the second end of the energy storage filter circuit.
3. The power-on control circuit according to claim 2, characterized in that the tank filter circuit comprises a capacitor, and/or the switching circuit comprises an IGBT switching circuit, and/or the protection circuit comprises a diode.
4. The power-on control circuit according to claim 3, wherein the driving circuit comprises a first output end and a second output end, the first output end of the driving circuit is connected with the motor to be driven to output a driving signal to the motor to be driven, and the second output end of the driving circuit is connected with the negative bus terminal;
when the energy storage filter circuit discharges, at least part of the energy storage filter circuit, the driving circuit and the protection circuit form a discharging loop.
5. The power-on control circuit according to claim 4, wherein the protection circuit comprises a plurality of diodes arranged in parallel, input ends of the plurality of diodes are connected to the second output end of the driving circuit, and output ends of the plurality of diodes are connected to the second end of the energy storage filter circuit.
6. The power-on control circuit according to claim 5, wherein the protection circuit further includes a current-limiting resistor, one end of the current-limiting resistor is connected to the second end of the energy-storage filter circuit, the other end of the current-limiting resistor is connected to the second output end of the driving circuit, and when the energy-storage filter circuit is discharged or charged to an electric quantity greater than a set threshold, the switching circuit is turned off to connect the current-limiting resistor to the discharge loop.
7. The power-on control circuit according to claim 1, wherein the rectifying circuit comprises three sets of diode legs, the diode legs comprising an upper bridge diode and a lower bridge diode.
8. The power-on control circuit according to claim 1, wherein the rectifying circuit comprises three sets of IGBT legs, the IGBT legs comprising an upper bridge IGBT and a lower bridge IGBT.
9. The power-on control circuit according to claim 1, further comprising a sampling circuit, wherein the sampling circuit is connected to the first output terminal of the driving circuit and the motor to be driven, so as to sample the driving signal output to the motor to be driven.
10. An integrated motor control device, comprising a controller and the power-on control circuit as claimed in any one of claims 1 to 9, wherein the controller is connected to the power-on control circuit and configured to issue a control command to the power-on control circuit, so that the power-on control circuit outputs a driving signal matching with the control command to a motor to be driven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921662070.8U CN211046752U (en) | 2019-09-30 | 2019-09-30 | Power-on control circuit and motor integrated control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921662070.8U CN211046752U (en) | 2019-09-30 | 2019-09-30 | Power-on control circuit and motor integrated control device |
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| Publication Number | Publication Date |
|---|---|
| CN211046752U true CN211046752U (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921662070.8U Active CN211046752U (en) | 2019-09-30 | 2019-09-30 | Power-on control circuit and motor integrated control device |
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| CN (1) | CN211046752U (en) |
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