TW201721612A - Educational two-phase motor model - Google Patents

Abstract

In this paper, an educational two-phase motor model is proposed. It allows us to illustrate the working principle of AC motor by demonstrating the rotating magnetic field with simple physics laws like linear and circular motion. The model is composed of a two-phase motor, a controller, and an oscilloscope which displays the power waveform. Inside the two-phase motor, there are four sets of electromagnets serving as the stators. Each set of electromagnet is surrounded by two-color LED lights to show the electromagnet excitation and polarity. Among them, a set of Cross-shape, high-brightness LED lights is allocated to exhibit the magnetic field vector component variation along the d, q axis of the stator. The surrounding circular light, which is consisted of 4 sets of high-brightness LED lights, demonstrates the rotating magnetic field. The arrow allocated on the rotating shaft indicates the direction of the rotating magnetic field. This model allows us to break down the continuous rapid rotating movement of a motor, into step-by-step manual control modes. With hands-on motor-control experience and LED lights indication, students could easily understand the how the rotating magnetic fields associate with working principle of AC motors.

Description

Two-phase motor model teaching aid

The present invention relates to a "motor model teaching aid" which is a physical concept of "linear motion and circular motion", and illustrates a manner in which an alternating current motor establishes a rotating magnetic field. The "two-phase motor model teaching aid" of this creation can be used to demonstrate the principle of operation of a single-phase and multi-phase AC motor to establish a rotating magnetic field. This creation uses the manual operation to continuously and rapidly rotate the motor into a low-speed operation mode of manual operation, which allows the learner to conveniently observe the change of the color of the LED lamp and understand the action principle of the AC motor to establish the rotating magnetic field, so as to achieve the purpose of effective teaching.

Rotating electrical equipment is an indispensable device in modern life. Therefore, courses such as "motor machinery" and "motor machinery experiment" are core courses in the traditional motor field and various motor tests. Therefore, colleges and universities at home and abroad have actively developed teaching experimental teaching aids for various "motor machinery" and "motor drive control" courses, but most of them belong to modular experimental teaching equipment, which is more focused on the theoretical verification of motor drive control. As for the demonstration, the teaching equipment for establishing the rotating magnetic field inside the motor is lacking. The previously developed AC motor teaching equipment is mainly composed of three-phase and single-phase motors. It is generally difficult to elaborate the principle of establishing a rotating magnetic field for the rotating motor. Therefore, the present invention utilizes the physical concept of "linear motion and circular motion" to explain the action principle of the alternating magnetic motor generating a rotating magnetic field, and uses the "two-phase motor model" as a teaching aid, and uses a high-brightness cross-shaped LED lamp to display two phases. The size of the AC sine wave voltage changes, and the LED light bar shows the change of the magnetic field after the motor coil is energized, and the motor is designed to be continuously operated in the manual operation mode. The speed of the rotary motion is decomposed into a slow decomposition action of the manual control, so that the learner can observe the change of the color and the brightness of the LED light during the personal control process, and realize the action principle of the AC motor step by step.

The present invention provides a "two-phase motor model teaching aid" comprising a two-phase motor model, a controller and a power waveform display box. The two-phase motor model is provided with a ring-shaped base, and the base is provided with four sets of electromagnets arranged circumferentially equidistantly to simulate the stator coils of the two-phase motor, and the four sets of electromagnets are covered with two-color LED lights. a strip for displaying the exciting state and polarity of the electromagnet, wherein the center of the model base is provided with a bearing, the bearing is provided with a rotating shaft, and the top of the rotating shaft is supported and fixed by a U-shaped bracket, and the bracket is disposed on the model base, the rotating shaft A permanent magnet is mounted thereon for simulating a rotor magnetic field of the two-phase motor, and a magnet orientation indicator pin is mounted on the rotating shaft for indicating the orientation of the rotating magnetic field of the two-phase motor stator, and the annular base is mounted with a circular transparent cover. An annular transparent plate is disposed inside the annular transparent cover, and a ring-shaped light bar is disposed on the annular transparent plate, and a cross-shaped LED light bar is disposed on the top of the annular transparent cover, and the model base is provided with an opening as a connection socket to facilitate power supply Waveform display box and controller wiring.

A power waveform panel is disposed on the top of the power waveform display box, and the power waveform panel is provided with a power waveform panel diagram for displaying the AC power and the action sequence of the two-phase motor model. A power waveform display box base is disposed under the power waveform panel, and an LED light bar is disposed in the base of the display box to display a power waveform action sequence.

A power circuit is disposed inside the controller casing to provide two-phase horse The DC power supply required for the model teaching aid. A control circuit is disposed inside the casing for executing the control law required for the two-phase motor model teaching device. A driving circuit is disposed inside the casing for driving the electromagnet and the LED light bar of the two-phase motor model.

In the "two-phase motor model teaching tool" of the present invention, a set of high-intensity cross-shaped LED lamps is used to display "linearly varying magnetic field components" of the two axes of the stator coils d and q. The four sets of high-brightness LED strips are used to form a ring light, which displays the rotating magnetic field of the stator, and an arrow is mounted on the rotating shaft to display the orientation of the "synthetic rotating magnetic field". The invention covers the electromagnetic coil around the high-brightness LED light bar, and can display the polarity and size of the magnetic field after the electromagnetic coil is energized. The invention manually interrupts the motor's continuous rapid rotation motion into a manual step mode and a low speed action mode of automatic acceleration and deceleration, so that the learner can observe the color change of the LED light bar through the process of personally controlling the model, and understand the communication. The principle of operation of the motor to establish a rotating magnetic field.

10‧‧‧Model base

11‧‧‧ ring base

12‧‧‧Electromagnet

13‧‧‧LED strips for electromagnets

14‧‧‧ bearing

15‧‧‧ shaft

16‧‧‧ bracket

17‧‧‧ permanent magnet

18‧‧‧Magnetic orientation indicator

19‧‧‧Circular transparent cover

20‧‧‧Circular transparent board

21‧‧‧Ring LED Strip Light

22‧‧‧Cross-shaped LED strips

23‧‧‧Connector socket (female)

24‧‧‧Power waveform display box panel

25‧‧‧Power waveform panel icon

26‧‧‧Power waveform display box base

27‧‧‧LED strips

28‧‧‧Controller housing

29‧‧‧Power circuit

30‧‧‧Control circuit

31‧‧‧Drive circuit

32‧‧‧Key switch (manual)

33‧‧‧Key switch (automatic)

34‧‧‧Selection switch

35‧‧‧ openings

36‧‧‧Power cord

37‧‧‧Connecting line

38‧‧‧Connector socket (male)

The first figure is a top view of the two-phase motor model of the present invention.

The second figure is a front view of the two-phase motor model of the present invention.

The third figure is a schematic diagram of the power waveform display box of the present invention.

The fourth figure is a schematic diagram of the controller of the present invention.

Referring to the first, second, third and fourth figures, the present invention provides a "two-phase motor model teaching aid" comprising a two-phase motor model and a power waveform display box. And a controller.

The two-phase motor model is provided with a model base 10, and the model base 10 is provided with an annular base 11 on which four sets of electromagnets 12 are arranged, arranged equidistantly in a circle, for simulating a stator coil of a two-phase motor. The electromagnet 12 is covered with red and green LED strips 13 for displaying the exciting state and polarity of the electromagnet 12. The center of the model base 10 is provided with a bearing 14 on which a rotating shaft 15 is provided. The top of the rotating shaft 15 is provided. Supported by a U-shaped bracket 16 disposed on the model base 10, the rotating shaft 15 is mounted with a permanent magnet 17 for simulating the rotor magnetic field of the two-phase motor, and the rotating shaft 15 is mounted with a magnet orientation indicator pin. An annular transparent cover 19 is mounted on the annular base 11 , and an annular transparent plate 20 is disposed on the annular transparent cover 19 , and a ring-shaped transparent plate 20 is disposed on the annular transparent plate 20 . The light bar 21 is provided with a cross-shaped LED light bar 22 at the top of the annular transparent cover 19, and the model base 10 is provided with an opening as a connection socket port 23 for convenient connection with the controller.

A power waveform panel 24 is disposed on the top of the power waveform display box. The power waveform panel 24 is provided with a power waveform panel diagram 25 for displaying the AC power and the sequence of actions of the two-phase motor model. A power waveform display box base 26 is disposed under the power waveform panel 24. The LED light bar 27 is disposed in the display box base 26 for displaying the power waveform operation sequence.

The controller housing 28 is internally provided with a power circuit 29 for providing the DC power required for the two-phase motor model teaching aid. A control circuit 30 is disposed inside the outer casing 28 for performing the control law required for the two-phase motor model teaching aid. The driving circuit 31 is configured to drive the electromagnet and the LED light bar of the two-phase motor model.

The top of the controller casing 28 is provided with two button switches, one is a manual switch 32, and the other is an automatic switch 33, which can set the rotational speed of the automatic mode. The top of the outer casing 28 is provided with a selection switch 34 for setting the manual and automatic modes. The side is provided with an opening 35 as an outlet of the power line 36 and the connecting line 37, and is connected to the two-phase motor model and the power waveform display box via the connecting cable socket 38 to form a two-phase motor model teaching aid.

In the "two-phase motor model teaching tool" of the present invention, a set of high-intensity cross-shaped LED lamps is used to display "linearly varying magnetic field components" of the two axes of the stator coils d and q. The four sets of high-brightness LED strips are used to form a ring light, which displays the rotating magnetic field of the stator, and an arrow is mounted on the rotating shaft to display the orientation of the "synthetic rotating magnetic field". The invention covers the electromagnetic coil around the high-brightness LED light bar, and can display the polarity and size of the magnetic field after the electromagnetic coil is energized. The invention manually interrupts the motor's continuous rapid rotation motion into a manual step mode and a low speed action mode of automatic acceleration and deceleration, so that the learner can observe the color change of the LED light bar through the process of personally controlling the model, and understand the communication. The principle of operation of the motor to establish a rotating magnetic field.

10‧‧‧Model base

11‧‧‧ ring base

12‧‧‧Electromagnet

13‧‧‧LED strips for electromagnets

14‧‧‧ bearing

15‧‧‧ shaft

16‧‧‧ bracket

17‧‧‧ permanent magnet

18‧‧‧Magnetic orientation indicator

19‧‧‧Circular transparent cover

20‧‧‧Circular transparent board

21‧‧‧Ring LED Strip Light

22‧‧‧Cross-shaped LED strips

23‧‧‧Connector socket (female)

Claims (6)

A "two-phase motor model teaching aid" includes: a two-phase motor model, and a ring-shaped base is arranged. The base is provided with four sets of electromagnets arranged in a circumferential equidistant ring shape to simulate the stator coil of the two-phase motor. The four sets of electromagnets are covered with a two-color LED light bar. The center of the model base is provided with a bearing, and the bearing is provided with a rotating shaft. The top of the rotating shaft is supported and fixed by a U-shaped bracket, and the bracket is disposed on the model base. A permanent magnet is mounted on the rotating shaft, and a magnet azimuth indicating pin is mounted on the rotating shaft. The annular base is mounted with an annular transparent outer cover. The annular transparent outer cover is internally provided with an annular transparent plate, and the annular transparent plate is provided with a ring-shaped light bar. The top of the annular transparent cover is provided with a cross-shaped LED light bar, and the model base is provided with an opening as a connection socket to facilitate connection with the power waveform display box and the controller. A power waveform display box is provided with a power waveform panel at the top of the power waveform display box for displaying the AC power and action sequence of the two-phase motor model. In a controller, a power supply circuit is disposed inside the controller casing for providing DC power required for the two-phase motor model teaching aid. A control circuit is disposed inside the casing for executing the control law required for the two-phase motor model teaching device. A driving circuit is disposed inside the casing for driving the electromagnet and the LED light bar of the two-phase motor model. The "two-phase motor model teaching aid" described in claim 1 is provided with four sets of electromagnets surrounded by two-color LED strips for simulating the excitation state and polarity of the stator coils of the two-phase motor. According to the "two-phase motor model teaching aid" described in claim 1, a magnet orientation indicator pin is mounted on the rotating shaft for indicating the orientation of the two-phase motor stator synthesizing the rotating magnetic field. According to the "two-phase motor model teaching aid" described in claim 1, a cross-shaped LED light bar is provided to display a magnetic field component in which the d and q axes of the stator coil are linearly changed. According to the "two-phase motor model teaching aid" described in claim 1, the power waveform panel is provided with a power waveform diagram, which is controlled by the LED light, and can display the operation sequence of the power source. According to the "two-phase motor model teaching aid" described in claim 1, the controller can set the manual operation to continuously and rapidly rotate the motor, and decompose it into a manual step mode and a low-speed action mode of automatic acceleration and deceleration, so that the learner can The process of manipulating the model by hand makes it easy to observe the color change of the LED light bar and understand the action principle of the AC motor to establish a rotating magnetic field.