CN218633740U - Motor control system and propulsion unit with same - Google Patents
Motor control system and propulsion unit with same Download PDFInfo
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- CN218633740U CN218633740U CN202222837497.5U CN202222837497U CN218633740U CN 218633740 U CN218633740 U CN 218633740U CN 202222837497 U CN202222837497 U CN 202222837497U CN 218633740 U CN218633740 U CN 218633740U
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Abstract
The application relates to a motor control system and have its propulsion unit, includes: a motor control system and a propulsion unit. A motor control system comprising: a control unit and an excitation control box. The control unit is provided with a direct current speed regulating device and an excitation transformer; the DC speed regulator inputs one path of power supply to the DC motor for excitation and the other path of power supply to the DC motor armature, and is suitable for controlling the DC voltage of the armature to regulate the rotating speed of the DC separately excited motor. The excitation control box is electrically connected with the excitation end of the direct current separately excited motor. The propulsion unit comprises: the device comprises a power generation device, a busbar, a motor control system and a direct current separately excited motor. The power generation device is electrically connected with the busbar through the parallel operation unit, and a filtering device is arranged in the power generation device and can filter reactive power and harmonic waves in a circuit.
Description
Technical Field
The application relates to the technical field of motor drive, in particular to a motor control system and a propulsion unit with the same.
Background
At present, in the field of ship driving, a direct current motor is mostly adopted as driving, and the direct current motor has the advantages of wide and smooth rotating speed adjusting range, large overload starting and braking torque, good reverse running characteristic and the like, thereby occupying an important position in an electric propulsion system. Particularly, a direct-current separately excited motor is widely used all the time, but a direct-current separately excited motor control system always has the problem of unstable control, so that the rotating speed of the motor is directly unstable, and the failure rate of a ship is increased.
Disclosure of Invention
In view of this, this application proposes a motor control system and has its propulsion unit.
In order to realize the purpose of the utility model, the motor control system and the propulsion unit with the same comprise a motor control system and a propulsion unit;
the motor control system includes: the control unit and the excitation control box;
the control unit is provided with a direct current speed regulating device and an excitation transformer;
the direct current speed regulating device is provided with a first input end, a first output end, a second input end and a second output end;
the first input end is suitable for being electrically connected with an external power supply, the first output end is suitable for being electrically connected with an armature winding of the direct-current separately excited motor, the second input end is electrically connected with the external power supply through an excitation transformer, and the second output end is electrically connected with an excitation winding of the direct-current separately excited motor;
the excitation control box is electrically connected with the excitation end of the direct current separately excited motor.
In one embodiment, the direct current speed regulation device is also provided with a main loop;
the main loop is respectively and electrically connected with an external power supply and the direct current separately excited motor.
In one embodiment, the dc speed adjusting device is further provided with a secondary circuit, the secondary circuit is electrically connected with the main circuit, and the secondary circuit is suitable for controlling the trigger angle of the thyristor of the three-phase rectifier bridge in the main circuit.
In one embodiment, the control unit is further provided with a main incoming line breaker, and the main incoming line breaker is arranged on a power supply line for supplying power to the direct current speed regulating device.
In one specific embodiment, an excitation controller is arranged in the excitation control box, and the excitation controller is electrically connected with an excitation winding of the direct-current separately excited motor.
A propulsion unit comprising: the device comprises a power generation device, a busbar, a control unit and a direct-current separately-excited motor;
the output end of the power generation device is electrically connected with the busbar;
a first input end and a second input end of the direct current speed regulating device are respectively and electrically connected with the busbar;
the direct current separately excited motor is electrically connected with the first output end and the second output end of the direct current speed regulating device respectively.
In one embodiment, the power generation device is provided with a parallel operation unit;
the power generation device is electrically connected with the busbar through the parallel operation unit.
In one specific embodiment, the number of the power generation devices is more than two, the number of the parallel operation units is the same as that of the power generation devices, and the power generation devices and the parallel operation units are arranged in a one-to-one correspondence manner.
In one embodiment, the power generation device is further provided with a filtering device;
the power generation device is electrically connected with the parallel operation unit through the filter device.
In one specific embodiment, more than two direct-current separately excited motors are arranged, the number of the motor control systems is consistent with that of the direct-current separately excited motors, and the motor control systems and the direct-current separately excited motors are arranged in a one-to-one correspondence manner.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.
FIG. 1 illustrates a schematic diagram of a motor control system and a propulsion unit having the same in an embodiment of the present application;
fig. 2 shows a layout of a motor control system and a propulsion unit having the same according to an embodiment of the present application.
Detailed Description
Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention or for simplicity in description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.
Fig. 1 shows a schematic diagram of a motor control system and a propulsion unit with the same according to an embodiment of the present application. As shown in fig. 1, the motor control system and the propulsion unit having the same includes: a motor control system and a propulsion unit.
In one possible implementation, the motor control system includes a control unit and an excitation control box 600; the control unit is provided with a direct current speed regulating device and an exciting transformer 320; the direct current speed regulating device is provided with a first input end, a first output end, a second input end and a second output end, wherein the first input end is suitable for being electrically connected with an external power supply, the first output end is suitable for being electrically connected with an armature winding 410 of the direct current separately excited motor, the second input end is electrically connected with the external power supply through an excitation transformer 320, and the second output end is electrically connected with an excitation winding 420 of the direct current separately excited motor; the excitation control box 600 is electrically connected with the direct current separately excited motor.
Here, it should be noted that the direct current separately excited motor is provided with a rotor and a stator, the rotor is suitable for generating electromagnetic torque and induced electromotive force, and is a hub for energy conversion of the direct current separately excited motor, which is also called an armature; the stator is adapted to generate a magnetic field, also known as excitation. The exciting transformer 320 can convert AC600V power into AC330V power, and is suitable for providing stable power supply for the exciting loop of the dc speed regulating device. The direct current speed regulating device inputs one path of a power supply to the direct current motor for excitation, and inputs the other path of the power supply to the direct current motor armature, and the direct current speed regulating device is suitable for controlling the direct current voltage of the armature to regulate the rotating speed of the direct current separately excited motor, thereby stably driving the rotation of the propeller and providing power for the ship. The direct current speed regulation device adopts a Siemens 6ra80 direct current speed regulation device, the Siemens 6ra80 direct current speed regulation device has rich communication interfaces, an excitation power supply can be selected, the power supply is flexible, the structure is compact, the phenomenon of unstable control of a direct current separately excited motor can be effectively improved, and the fault rate of a transmission system is greatly reduced. The SINAMICS DC MASTER series products are rich and various, the required training time is less, the cost is lower, and the products use the maximum number of the same components. The SINAMICS DC MASTER series products seamlessly cover an extremely wide range of currents and voltages. Three-phase power supply wiring is adopted. Flexible expansion capability in terms of functionality and performance. The product series is rich, and a plurality of optional parts are provided, so that the direct current speed regulator can optimally meet personal requirements in both technology and economy. The type and number of interfaces, as well as the computational performance and speed of rotation, can be met accurately by selecting the criteria clud, advanced clud, or a combination of both. Plant and system availability is significantly improved by the ability to quickly and easily replace components. The design of the replaceable components enables them to be replaced quickly and easily. The available spare parts can be checked at any time and assigned to the governor's serial number. One end of the excitation control box 600 is electrically connected with the excitation winding 420 of the direct current separately excited motor, the other end is electrically connected with an external power supply through an excitation transformer 320, 1 60A excitation controller is arranged in the excitation control box 600, and the excitation control box 600 can provide an excitation power supply for the direct current separately excited motor under an emergency condition.
In one possible implementation, the dc speed adjusting device is further provided with a main loop, and the main loop is controlled by the main driving control panel 300; the main loop is respectively electrically connected with an external power supply and the direct current separately excited motor, an AC600V power supply outputs 0-750V direct current voltage after being rectified by a three-phase rectifier bridge to drive the direct current separately excited motor, the direct current separately excited motor can provide feedback current for the direct current speed regulating device, the direct current speed regulating device can judge the rotating speed condition of the direct current motor according to the feedback current, the armature voltage output is corrected if necessary, the EMF closed-loop control scheme is used for realizing the precise control of the rotating speed of the motor, and the rotating speed of the direct current separately excited motor is regulated. The direct current speed regulating device is also provided with a secondary circuit, and the secondary circuit is controlled by an auxiliary drive control screen 310; the secondary circuit is suitable for controlling the trigger angle of the controllable silicon of the three-phase rectifier bridge in the main circuit, thereby achieving the purpose of controlling the rotating speed of the direct current motor. After the direct current speed regulating device is powered on, a set control console gives an enabling signal (switching value signal) of the direct current speed regulating device to trigger a Silicon Controlled Rectifier (SCR) in a rectifier bridge of a main loop, and a rotating speed given signal (analog quantity signal) is provided to adjust the trigger angle of the SCR so that the main loop can output 0-750V direct current armature voltage. The method can be realized by adopting the common technical means in the field, and the technical personnel in the field can flexibly set the control method of the loop according to personal preference and/or practical application scenes as long as the requirement is met.
The SINAMICS DC MASTER series comprises a direct current speed regulator and a control module. The dc speed regulator includes a built-in device for connecting to a three-phase power supply system. This provides rotor and excitation power for the dc adjustable speed drive. The rated dc current ranges from 15A to 3000A and can be further increased by parallel connection. The speed regulator can be provided with a two-quadrant operation type speed regulator and a four-quadrant operation type speed regulator according to the practical application condition, and is provided with an integrated excitation power unit. Because the direct current speed regulator is integrated with the parameter setting device, no additional equipment is needed for parameter setting. All functions related to open-loop and closed-loop control, as well as all monitoring and auxiliary functions, are handled by the microprocessor system. The set value and the actual value may be input as analog or digital values.
In one possible implementation, a main incoming line breaker is disposed inside the main driving control panel 300, and the main incoming line breaker is disposed on a power supply line supplying power to the main speed regulation device, and is adapted to supply power to the main speed regulation device and provide short circuit protection.
The main drive control panel 300 is also internally provided with a control transformer, the cooling fan is connected with an AC600V power supply through the control transformer and a fuse, and the control transformer can output the input AC600V voltage as AC400V voltage, so that an alternating current power supply is provided for the cooling fan.
The main drive control panel 300 is internally provided with an in-panel heater and four in-panel fans, the in-panel heater and the four in-panel fans are electrically connected with an AC600V power supply through a control transformer, the control transformer can output an input AC600V voltage as an AC230V voltage, and therefore an alternating current power supply is provided for the in-panel fans and the in-panel heaters. The temperature inside the screen can be controlled and driven by the in-screen fan and the in-screen heater, so that a good working environment is formed.
The PLC control system is arranged in the main drive control screen 300, the PLC500 is electrically connected with the Siemens 6ra80 direct current speed regulation device through a special mark relay and a clock pulse, information between the PLC500 and a controlled object can be communicated through the special mark relay, equipment state and operation result information in a program running process are read, certain control operation can be realized by utilizing the information PLC500, the clock pulse can be synchronously communicated, and the control operation is more convenient and rapid. The PLC control system is a control center of the whole logic, realizes logic protection of the main driving system and simultaneously erects a bridge for connecting the driving system and the original automatic system.
The number of the drive control screens in the motor control system is three, namely a left drive control screen, a middle drive control screen and a right drive control screen. The number of the direct-current separately excited motors is consistent with that of the drive control panels, the number of the direct-current separately excited motors is three, namely a left-drive motor, a middle-drive motor and a right-drive motor, and the three drive control panels are arranged in one-to-one correspondence with the three direct-current separately excited motors. The number of the exciting transformers 320 is the same as that of the direct current separately excited motors, and the three exciting transformers 320 are arranged in one-to-one correspondence with the three direct current separately excited motors. Each driving control screen converts AC600V alternating current into DC 0-750V continuously adjustable direct current, and respectively drives 3 direct current separately excited motors so as to drive corresponding propellers to rotate and provide power for ships. The excitation control box 600 is electrically connected with the excitation windings 420 of the three direct current separately excited motors, and the excitation control box 600 is suitable for providing an excitation power supply for any direct current separately excited motor under an emergency condition.
In one possible implementation, a propulsion unit, comprising: the system comprises a power generation device, a busbar, a motor control system and a direct current separately excited motor; the first input end and the second input end of the direct current speed regulating device are respectively and electrically connected with the busbar, and the direct current separately excited motor is respectively and electrically connected with the first output end and the second output end of the direct current speed regulating device. The power generation device comprises a power generator 100 and a power generation cabinet 200, wherein a parallel operation unit is arranged in the power generation cabinet 200, and the power generator 100 is electrically connected with a busbar through the parallel operation unit. The power generation device is also provided with a filter device, and the power generation device is electrically connected with the parallel operation unit through the filter device.
Here, it should be noted that the parallel operation unit can ensure the reliability and continuity of power supply, the busbar has the functions of collecting current and distributing current, and the power generation device is electrically connected with the dc speed adjusting device through the busbar and is suitable for stably supplying current to the excitation winding 420 and the armature winding 410. The filtering device is a set of reactive and harmonic suppression devices, and is arranged on a loop output by the generator 100. Due to the dc system, many reactive and harmonic waves are generated.
Further, two generators 100 are provided, the number of the power generation cabinets 200 is the same as that of the generators 100, and the two power generation cabinets 200 and the two generators 100 are arranged in one-to-one correspondence.
The direct current separately excited motor is provided with a motor space heater, the motor space heater is directly connected with the 2P air switch in the distribution box to provide a 220V power supply for the direct current separately excited motor, the output end of the motor space heater is electrically connected with the direct current separately excited motor, and the motor space heater can prevent the direct current separately excited motor from being wetted and being started by supercooling. The three motor space heaters are arranged and respectively correspond to the three direct current separately excited motors one by one.
The motor control system and the propulsion unit with the motor control system are also provided with a centralized control console, and the SCR start control and the SCR stop control are electrically connected with the centralized control console. The direct current speed regulating device 6ra80 body is provided with a functional terminal, components such as a control handle and a button of a centralized control console are connected with the functional terminal on the direct current speed regulating device 6ra80 through a secondary line, a switching value signal is given to control the starting and stopping of the SCR, and an analog value signal is given to control the trigger angle of the SCR trimming bridge silicon controlled rectifier to achieve the purpose of controlling the rotating speed of the motor.
The motor control system and the propulsion unit with the motor control system can conveniently carry out debugging and parameter setting by using an interactive menu on a BOP20 advanced operator panel with a graphical LCD and a plain text display screen, and can also carry out debugging on a PC by using a STARTER debugging tool. Moreover, since SINAMICS DC MASTER is preset when it leaves the factory, it is not necessary to set its specific parameters at all. The fully electronic parameter setting process also makes the adjustment according to the specific application very convenient. Because the device does not contain any potentiometer, switch, jumper wire or DIP switch, the device can be put into operation after maintenance. All components of the device are tested and tested in a comprehensive manner during the entire production process, in order to ensure a high degree of functional safety. Integration into automation solutions is easily achieved using communication interfaces such as the standard PROFIBUS and various analog and digital interfaces.
The motor control system and the propulsion unit with the motor control system are provided with a DC24V power supply indicator light which is suitable for indicating whether the power supply normally supplies power to the electrical appliance; the main breaker closing indicator lamp is arranged to indicate the state of the opening and closing brake and monitor the integrity of the loop; a fan fault lamp is arranged and is suitable for indicating the working state of the fan; and an SCR running lamp and an SCR fault lamp are arranged.
The foregoing description of the embodiments of the present application has been presented for purposes of illustration and description and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A motor control system, comprising:
the control unit and the excitation control box;
the control unit is provided with a direct current speed regulating device and an excitation transformer;
the direct current speed regulating device is provided with a first input end, a first output end, a second input end and a second output end;
the first input end is suitable for being electrically connected with an external power supply, the first output end is suitable for being electrically connected with an armature winding of the direct-current separately excited motor, the second input end is electrically connected with the external power supply through the exciting transformer, and the second output end is electrically connected with an exciting winding of the direct-current separately excited motor;
the excitation control box is electrically connected with the excitation end of the direct current separately excited motor.
2. The motor control system of claim 1 wherein said dc speed adjustment means further comprises a primary loop;
the main loop is respectively and electrically connected with the external power supply and the direct current separately excited motor.
3. The motor control system of claim 2, wherein the dc speed regulator further comprises a secondary circuit electrically connected to the primary circuit, the secondary circuit adapted to control the trigger angle of the thyristors of the three-phase rectifier bridge in the primary circuit.
4. A motor control system according to claim 3, characterised in that the control unit is further provided with a mains breaker arranged on a power supply line supplying the dc speed regulation device.
5. The motor control system according to claim 1, wherein an excitation controller is provided inside the excitation control box, and the excitation controller is electrically connected to an excitation winding of the direct-current separately excited motor.
6. A propulsion unit, comprising:
a power generation device, a busbar, the motor control system of any one of claims 1 to 5, and the direct current separately excited motor;
the output end of the power generation device is electrically connected with the busbar;
the first input end and the second input end of the direct current speed regulating device are respectively electrically connected with the busbar;
the direct current separately excited motor is electrically connected with the first output end and the second output end of the direct current speed regulating device respectively.
7. A propulsion unit according to claim 6, characterised in that the power generation means is provided with a parallel unit;
the power generation device is electrically connected with the busbar through the parallel operation unit.
8. The propulsion unit of claim 7, wherein the number of the power generation devices is two or more, the number of the parallel operation units is the same as that of the power generation devices, and the power generation devices and the parallel operation units are provided in one-to-one correspondence.
9. A propulsion unit according to claim 7, characterised in that the power generation means are further provided with filtering means;
and the power generation device is electrically connected with the parallel operation unit through the filter device.
10. The propulsion unit according to claim 6, wherein more than two direct current separately excited motors are provided, the number of the motor control systems is the same as that of the direct current separately excited motors, and the motor control systems and the direct current separately excited motors are arranged in a one-to-one correspondence manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222837497.5U CN218633740U (en) | 2022-10-26 | 2022-10-26 | Motor control system and propulsion unit with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222837497.5U CN218633740U (en) | 2022-10-26 | 2022-10-26 | Motor control system and propulsion unit with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218633740U true CN218633740U (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222837497.5U Active CN218633740U (en) | 2022-10-26 | 2022-10-26 | Motor control system and propulsion unit with same |
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| CN (1) | CN218633740U (en) |
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- 2022-10-26 CN CN202222837497.5U patent/CN218633740U/en active Active
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