Speed ​​control device for permanent magnet synchronous motors

Abstract

A speed control device for permanent magnet-fed synchronous motors, comprising a permanent magnet-fed synchronous motor main body (1), characterized in that the top of the permanent magnet-fed synchronous motor main body (1) is fixedly connected to a control housing (2); a detachable connection plate (3) is mounted on the top of the control housing (2); the interior of the control housing (2) is fixedly connected to a central processor (5), and an inner side of the control housing (2) is fixedly connected to a speed sensor (7); the inner side of the control housing (2) is fixedly connected to an inverter module (8), and the other inner side of the control housing (2) is fixedly connected to a mains rectifier module (6); one side of the control housing (2) is fixedly connected to a terminal (4);the central processor (5), the mains rectifier module (6), the speed sensor (7), the inverter module (8), and the permanent magnet-fed synchronous motor main body (1) are electrically connected; and a cooling element (10) is mounted inside the connection plate (3);

Description

Technical FieldThe present invention relates to the technical field of motors, and more particularly to a speed control controller for permanent magnet synchronous motors.Prior ArtThe permanent magnet powered synchronous motor is a synchronous motor that generates a magnetic field with permanent magnets. The rotational speed of the rotor corresponds to the current frequency of the stator winding. The permanent magnet synchronous motor is composed of a stator, a rotor and an end cover and other components. The stator is substantially identical to a conventional induction motor and has a laminated core structure to reduce iron losses during operation of the motor. The rotor can be manufactured massively or can be pressed from sheets. The armature winding may comprise a concentrated all-tooth winding, a distributed short-tooth winding or an non-conventional winding.The operating principle of the permanent magnet powered synchronous motor is based on the interaction between the rotating magnetic field generated by the stator and the magnetic field generated by the permanent magnets on the rotor. The rotor is equipped with premagnetized permanent magnets which can generate a strong magnetic field when rotating and thus provide a greater output torque. The motor controller precisely controls the current to ensure that the rotor of the motor rotates synchronously with the rotating magnetic field and maintains a stable operating state.With the increasing demand of the industry on the control performance of the permanent magnet powered synchronous motor, the rotation speed of the motor needs to be controlled in real time by a controller. In controlling the motor, several electrical components must be used in conjunction to achieve control of the motor. In the real-time speed control of the engine, the temperature of the components continuously rises during the real-time operation. If the temperature rises too quickly, the components may inevitably be damaged, which in turn interferes with the user application.Content of the Utility ModelThe object of the present invention is to solve the problem that, in the real-time engine speed control, the temperature of the components increases steadily during operation, and that, if the temperature increases too rapidly, the components are inevitably damaged, thus impairing the user's application. Therefore, the present invention provides a speed control control device for permanent magnet synchronous motors.In order to achieve the above object, the present invention concretely employs the following technical solutions.A speed control controller for permanent magnet synchronous motors includes a permanent magnet synchronous motor main body. The top surface of the permanent magnet powered synchronous motor main body is fixedly connected to a control housing; a detachable connection plate is mounted on the top surface of the control housing; the interior of the control housing is fixedly connected to a central processor and an inner side of the control housing is fixedly connected to a speed sensor; the inner side of the control housing is fixedly connected to an inverter module and the other inner side of the control housing is fixedly connected to a line rectifier module; one side of the control housing is fixedly connected to a terminal; the central processor, the line rectifier module, the speed sensor, the inverter module and the permanent magnet powered synchronous motor main body are electrically connected; and a cooling member is mounted in the interior of the connection plate.By using the above technical solution, the internal component of the cooling element is driven by the operation of the cooling element. This allows the outside air to be drawn into the control housing to ventilate and cool the internal components in the control housing. In this way, the likelihood that the components will be damaged due to overheating during long term use is reduced and the overall life of the controller is increased.Furthermore, the control housing and the connection plate are firmly connected to one another via a plurality of closure clamps.By using the above technical solution, by manually operating the locking clips, the control housing and the terminal plate can be separated, so that it is convenient for the users to maintain the internal components of the control housing.Further, the cooling member includes a shutter plate fixedly connected inside the terminal plate; a plurality of ventilation holes are provided on the shutter plate; a fan is fixedly connected in each of the ventilation holes; and the inner top surface of the terminal plate is fixedly connected to a dust shielding net plate.By applying the above technical solution, the outside air can be sucked into the control case under the movement of the fans to cool the internal components of the control case.Furthermore, a plurality of ventilation openings are provided on both sides of the control housing.By using the above technical solution, the air inside the control box can be blown off through several ventilation openings to achieve the air circulation inside the control box together with the fans.Further, moisture proofing agents are disposed on both inner sides of the control case.By using the above technical solution, the moisture proofing agents can be used to remove the moisture inside the control case.Further, the moisture proofing agents include plug plates fixedly connected at inner sides of the control case, and moisture proofing plates are inserted into the plug plates.By applying the above technical solution, when it is necessary to replace the moisture shielding plates, the moisture shielding plates can be pulled out of the patch plates to replace the moisture shielding plates.In summary, the present invention provides at least one of the following advantages. 1. in the present invention, during the speed control of the permanent magnet powered synchronous motor main body, the speed sensor measures the speed at which the permanent magnet powered synchronous motor main body runs, and transmits the data to the central processor. The central processor then controls the line rectifier module and the inverter module based on these data to control the rotational speed of the permanent magnet-powered synchronous motor main body via the line rectifier module and the inverter module. This makes it convenient for users to regulate the rotation speed of the permanent magnet-powered synchronous motor main body in real time. 2. in the present invention, the operation of the cooling element drives the internal components of the cooling element. This allows the outside air to be drawn into the control housing to ventilate and cool the internal components in the control housing. In this way, the likelihood that the components will be damaged due to overheating during long term use is reduced and the overall life of the controller is increased.DESCRIPTION OF THE ACCOMPANYING DRAWINGSFIG. 1 is a mounting structure diagram of the present invention; FIG. 2 is a three-dimensional structural diagram of the present invention; FIG. 3 is a structural diagram of a cooling member of the present invention; and FIG. 4 is an internal structural diagram of a control case of the present invention.Explanation of Reference Numerals:1-permanent magnet powered synchronous motor main body; 2-control housing; 3-terminal plate; 4-terminal; 5-central processor; 6-line rectifier module; 7-speed sensor; 8-inverter module; 9-shutter bracket; 10-cooling element; 21-vent hole; 22-patch plate; 23-moisture shield plate; 101-shutter plate; 102-vent hole; 103-fan; and 104-dust shield panel.Exemplary EmbodimentsThe present invention will be explained in detail below with reference to FIGS. 1 to 4.The embodiments of the present invention disclose a speed control controller for permanent magnet powered synchronous motors.Referring to FIGS. 1 to 4, a speed control controller for permanent magnet synchronous motors includes a permanent magnet synchronous motor main body 1. the upper surface of the permanent magnet synchronous motor main body 1 is fixedly connected to a control case 2; a detachable connection plate 3 is mounted on the upper surface of the control case 2; the inside of the control case 2 is fixedly connected to a central processor 5, and an inner side of the control case 2 is fixedly connected to a speed sensor 7; the inner side of the control case 2 is fixedly connected to an inverter module 8, and the other inner side of the control case 2 is fixedly connected to a power rectifier module 6; one side of the control case 2 is fixedly connected to a terminal 4; the central processor 5, the power rectifier module 6, the rotation speed sensor 7, the inverter module 8, and the permanent magnet powered synchronous motor main body 1 are electrically connected; and a cooling member 10 is mounted inside the terminal plate 3.When the rotation speed of the permanent magnet synchronous motor main body 1 is to be regulated, first, the control case 2 may be fixed to the permanent magnet synchronous motor main body 1, and external connection cables are respectively inserted into the terminal 4 and the permanent magnet synchronous motor main body 1 to establish the connection between the permanent magnet synchronous motor main body 1 and the control case 2. During the operation of the permanent magnet powered synchronous motor main body 1, the rotation speed sensor 7 may measure the rotation speed at which the permanent magnet powered synchronous motor main body 1 runs and transmit the measured data to the central processor 5. The central processor 5 processes and analyzes the measured data. When the rotation speed of the permanent magnet synchronous motor main body 1 needs to be regulated, the central processor 5 may control the grid rectifier module 6 and the inverter module 8. By the coordinated movement of the power rectifier module 6 and the inverter module 8, the rotation speed of the permanent magnet synchronous motor main body 1 is regulated, so that it is convenient for users to regulate the rotation speed of the permanent magnet synchronous motor main body 1 in real time.When the device is operated, the operation of the cooling member 10 may cause the internal components of the cooling member 10 to suck the outside air into the control case 2 so as to ventilate and cool the central processor 5, the grid rectifying module 6, the rotation speed sensor 7, and the inverter module 8 inside the control case 2. This reduces the likelihood that the components will be damaged due to too rapid a temperature rise during long term use and increases the life of the device.Referring to FIGS. 2 and 3, the control housing 2 and the terminal plate 3 are fixedly connected to each other via a plurality of locking clips 9. The cooling member 10 includes a shutter plate 101 fixedly connected inside the terminal plate 3; a plurality of ventilation holes 102 are provided on the shutter plate 101; a fan 103 is fixedly connected in each of the ventilation holes 102; and the inner upper surface of the terminal plate 3 is fixedly connected to a dust shielding net plate 104. A plurality of air vents 21 are provided on both sides of the control case 2.When the internal components of the control case 2 need to be maintained, by manually operating the locking clips 9, the control case 2 can be separated from the terminal plate 3, so that it is convenient for the users to maintain the internal components of the control case 2. During operation of the device, the outside air may be sucked into the control housing 2 under the movement of the fans 103. The air that enters the control housing 2 can flow out again through a plurality of ventilation openings 21, so that an air circulation is achieved in the interior of the control housing 2. Thereby, cooling of the internal components of the control case 2 is performed, the possibility that the components are damaged due to overheating during long-term use is reduced, and the overall life of the controller is increased. The dust protection net plate 104 can block outside dust and reduce the penetration of dust.Referring to FIG. 4, moisture proofing agents are disposed on both inner sides of the control case 2. The moisture protection means comprise plug plates 22 fixedly connected to inner sides of the control housing 2, and moisture protection plates 23 are inserted into the plug plates 22.The moisture shielding plates 23 can absorb the moisture inside the control case 2, thereby reducing the moisture inside the control case 2. Thereby, moisture protection measure is performed for the internal components of the control case 2, the possibility that the components are damaged due to moisture damage is reduced, and the device life is increased.When the moisture shielding plates 23 need to be replaced, the moisture shielding plates 23 may be pulled out of the plug plates 22 to replace the moisture shielding plates 23.The working mechanism is as follows. When the rotation speed of the permanent magnet synchronous motor main body 1 is to be regulated, first, the control case 2 may be fixed to the permanent magnet synchronous motor main body 1, and external connection cables are respectively inserted into the terminal 4 and the permanent magnet synchronous motor main body 1 to establish the connection between the permanent magnet synchronous motor main body 1 and the control case 2. During the operation of the permanent magnet powered synchronous motor main body 1, the rotation speed sensor 7 may measure the rotation speed at which the permanent magnet powered synchronous motor main body 1 runs and transmit the measured data to the central processor 5. The central processor 5 processes and analyzes the measured data. When the rotation speed of the permanent magnet synchronous motor main body 1 needs to be regulated, the central processor 5 may control the grid rectifier module 6 and the inverter module 8. By the coordinated movement of the power rectifier module 6 and the inverter module 8, the rotation speed of the permanent magnet synchronous motor main body 1 is regulated, so that it is convenient for users to regulate the rotation speed of the permanent magnet synchronous motor main body 1 in real time.During operation of the device, the outside air may be sucked into the control housing 2 under the movement of the fans 103. The air entering the control housing 2 can flow out again through a plurality of ventilation openings 21, so that an air circulation inside the control housing 2 is achieved, in order to ventilate and cool the central processor 5, the mains rectifier module 6, the rotational speed sensor 7 and the inverter module 8 inside the control housing 2. This reduces the likelihood that the components will be damaged due to too rapid a temperature rise during long term use and increases the life of the device.

Claims

A speed control controller for permanent magnet synchronous motors, comprising a permanent magnet synchronous motor main body (1), characterized in that the top surface of the permanent magnet synchronous motor main body (1) is fixedly connected to a control housing (2); a detachable connection plate (3) is mounted on the top surface of the control housing (2); the interior of the control housing (2) is fixedly connected to a central processor (5), and an inner side of the control housing (2) is fixedly connected to a speed sensor (7); the inner side of the control housing (2) is fixedly connected to an inverter module (8), and the other inner side of the control housing (2) is fixedly connected to a mains rectifier module (6); one side of the control housing (2) is fixedly connected to a terminal (4); the central processor (5), the line rectifier module (6), the rotation speed sensor (7), the inverter module (8), and the permanent magnet powered synchronous motor main body (1) are electrically connected; and a cooling member (10) is mounted inside the terminal plate (3).The speed control controller for permanent magnet synchronous motors according to claim 1, characterized in that the control housing (2) and the terminal plate (3) are fixedly connected to each other via a plurality of locking brackets (9).The speed control controller for permanent magnet synchronous motors according to claim 1, characterized in that the cooling member (10) includes a shutter plate (101) fixedly connected inside the terminal plate (3); a plurality of ventilation holes (102) are provided on the shutter plate (101); a fan (103) is fixedly connected in the ventilation holes (102), respectively; and the inner top surface of the terminal plate (3) is fixedly connected to a dust shielding net plate (104).The speed control controller for permanent magnet synchronous motors according to claim 1, characterized in that a plurality of air vents (21) are provided on both sides of the control case (2).The speed control controller for permanent magnet synchronous motors according to claim 1, characterized in that moisture proofing agents are disposed on both inner sides of the control case (2).The speed control controller for permanent magnet synchronous motors according to claim 5, characterized in that the moisture proofs at inner sides of the control case (2) comprise fixedly connected plug plates (22), and moisture proof plates (23) are inserted into the plug plates (22).

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