CN110824358A - Low-power multi-type motor series experiment platform - Google Patents

Abstract

The invention relates to a low-power multi-type motor series experiment platform. It includes: low voltage motor controller, universal motor controller, DC motor, permanent magnet synchronous motor, asynchronous motor and rectifier. The experimental components are installed on the insulating board, which is safe and convenient. This experimental platform can easily and diversely realize the experiments of motor control, and help students better understand the control theory, experimental phenomena and results of the motor.

Description

A low-power multi-type motor series experiment platform

technical field

The invention belongs to experimental instruments, and is a low-power multi-type motor series experimental platform, which is applied to electrical and automation motor control and power electronic experiments in colleges and universities, and belongs to the field of teaching and research equipment.

Background technique

At present, in major educational colleges and universities, some undergraduates or postgraduates who study power electronics and electric drive, motor driving courses often need to apply practical and suitable motors for research and study in the process of learning. However, in practical situations, most of the motor platforms are large and difficult to operate, which is dangerous to a certain extent. In addition, there are only one type of motor in many platforms, so it is impossible to observe the experimental phenomenon when multiple motors cooperate together. , many motors can only work under a single voltage condition, and also lack the richness of learning and research.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a low-power multi-type motor series test platform for the deficiencies of the prior art. Compared with most of the motor control platforms that have been launched, the volume of this platform is smaller, and the total weight does not exceed 12 kilograms. It is easy to operate, and the platform is rich in structure. It contains a variety of motors inside, which can be selected according to research needs, as well as high and low voltages, which can also be adjusted according to research needs. In addition, the components in the platform are connected to each other and can be connected to external devices. The regulation is also very convenient and easy to operate, which realizes the diversity of research to a high degree.

In order to achieve the above object, the technical scheme adopted by the present invention is:

The main components of this low-power multi-type motor series experiment platform are: low-voltage motor controller (1), general motor controller (2), asynchronous motor (3), permanent magnet synchronous motor (4), DC motor (5) and rectifier device (6).

All the components mentioned above are fixed on the insulating plate without confusion, and the various components are connected by wires or pins. The emulator is connected to the motor controller, and the emulator can be connected to a computer, which is convenient for downloading and debugging programs. The rectifier device is connected to the AC power supply, and various power supplies required by the experimental platform can be obtained.

Compared with the prior art, the present invention has the following obvious outstanding substantive features and significant technological progress: it is very practical for undergraduate and postgraduate teaching, small in size, convenient for research and study, and has a high safety factor, which can ensure that during the research process Safety of the experiment. In addition, multiple motors can realize a variety of experimental operations, not only can research and experiment on a single motor, but also can conduct drag experiments on two motors, and different motors correspond to different voltages, which can realize a variety of control methods, A variety of experimental phenomena have been observed, thereby enriching the diversity of practical applications.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention. In the figure, 1. low-voltage motor controller, 2. general motor controller, 3. asynchronous motor, 4. permanent magnet synchronous motor, 5. DC motor, 6. rectifier.

FIG. 2 is a schematic circuit diagram of an example of the present invention.

Detailed ways

The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

Example 1:

Referring to Figure 1 and Figure 2, this low-power multi-type motor series experiment platform includes a low-voltage motor controller (1), a general motor controller (2), an asynchronous motor (3), a permanent magnet synchronous motor (4), and a DC motor (5), and the rectifying device (6). It is characterized in that: each component (1, 2, 3, 4, 5, 6) of the experimental platform is fixed on an insulating plate.

The various components are connected by wires as follows:

The low-voltage motor controller (1) is connected with the permanent magnet synchronous motor (4) and the DC motor (5) through the circuit breaker switch; the general motor controller (2) and the asynchronous motor (3) are connected through the circuit breaker switch; the low-voltage motor controller ( 1) Both the general motor controller (2) are powered by the rectifier device (6);

The shafts of the asynchronous motor (3), the permanent magnet synchronous motor (4) and the DC motor (5) are connected through a coupling;

Working principle: Asynchronous motor (3), permanent magnet synchronous motor (4) and DC motor (5) can all operate in motor mode or generator mode. When the motor runs in generator mode, the motor generates a torque opposite to the rotation of the shaft, which has the effect of applying a load.

Embodiment 2:

This embodiment is basically the same as the first embodiment, and the special features are as follows:

The experimental platform is small in size, with a total weight of no more than 12 kilograms, and is portable. The power supply voltage of the motor controller (1) does not exceed 36V and has safety features. The power supply voltage of the motor controller (2) does not exceed 400V and has high voltage characteristics. The multi-type motors (3, 4, 5) are low-power motors, and the power of each motor does not exceed 90W. The permanent magnet synchronous motor (4) has a photoelectric encoder and a Hall position sensor, and can output an optical encoder signal and a Hall signal. The DC motor (5) has a photoelectric encoder and is capable of outputting optically encoded signals.

Embodiment three:

This embodiment is basically the same as the first embodiment, and is described in detail as follows in conjunction with FIG. 1 :

In Figure 1, the low-voltage motor controller (1) and the general motor controller (2) are both composed of a motor drive board and a control board, and the motor drive board and the control board are connected through pins. The low-voltage motor controller (1) is connected with the permanent magnet synchronous motor (4) and the DC motor (5); the general motor controller (2) is connected with the asynchronous motor (3). The low-voltage motor controller (1), the general motor controller (2), the asynchronous motor (3), the permanent magnet synchronous motor (4), and the DC motor (5) are all powered by the rectifier device (6). One end of the rotating shaft of the asynchronous motor (3) is connected with the rotating shaft of the DC motor (5), and the other end is connected with the permanent magnet synchronous motor (4). The asynchronous motor (3), the permanent magnet synchronous motor (4) and the DC motor (5) can be loads for each other. When the asynchronous motor (3) operates in generator mode, the torque generated by the motor is opposite to the direction of rotation of the rotating shaft, and a load is applied to the permanent magnet synchronous motor (4) and the DC motor (5) operating in the motor mode. When the permanent magnet synchronous motor (4) or the DC motor (5) operates in generator mode, the torque generated by the motor is opposite to the direction of rotation of the rotating shaft, and a load is applied to the asynchronous motor (3) operating in motor mode.

The realization process of this experimental platform is described as follows:

First, the platform is connected to the AC power supply, and the DC working voltage of the motor controller (1, 2) is obtained through the rectifier device, wherein the DC working voltage supplies power to the motor drive board and the control board of the motor controller (1, 2). The motor controllers (1, 2) are connected to the computer through the emulator, the program is downloaded to the controller through the computer, and the program is debugged, thereby simultaneously controlling the asynchronous motor (3), the permanent magnet synchronous motor (4) and the DC motor (5) . An ammeter is installed on the A-phase of the asynchronous motor and the A-phase of the DC motor and the permanent magnet synchronous motor respectively, and the current is displayed in real time to observe the phenomenon in the experiment. During the experiment, the asynchronous motor (3) is used as a generator, the permanent magnet synchronous motor (4) or the DC motor (5) is used as the motor, and the asynchronous motor (3) can be a permanent magnet synchronous motor (4) or a DC motor (5) provide load. The circuit breaker in the experimental platform can disconnect the input voltage of the asynchronous motor (3), the permanent magnet synchronous motor (4), the DC motor (5), and the rectifier (6), and play a protective role.

Finally, it should be pointed out that this platform can easily realize the operation of motor experiments, and the platform is rich in content, realizing the diversity of experiments.

Claims (3)

1. The utility model provides a low-power multiclass motor series connection experiment platform, includes low-voltage motor controller (1), general motor controller (2), asynchronous machine (3), PMSM (4), direct current motor (5) and fairing (6), its characterized in that: each part (1, 2, 3, 4, 5, 6) of the experiment platform is fixed on an insulating plate, and the parts are connected with each other through a lead or a contact pin as follows:

the low-voltage motor controller (1) and the universal motor controller (2) are both composed of a motor drive board and a control board, and the motor drive board is connected with the control board through a contact pin;

the low-voltage motor controller (1) is connected with the permanent magnet synchronous motor (4) and the direct current motor (5); the universal motor controller (2) is connected with the asynchronous motor (3);

the low-voltage motor controller (1), the universal motor controller (2), the asynchronous motor (3), the permanent magnet synchronous motor (4) and the direct current motor (5) are all powered by a rectifying device (6); one end of the rotating shaft of the asynchronous motor (3) is connected with the rotating shaft of the permanent magnet synchronous motor (4), and the other end of the rotating shaft of the asynchronous motor is connected with the direct current motor (4).

2. The low-power multi-class motor series experimental platform of claim 1, characterized in that: the motors (3, 4 and 5) are all low-power motors, and the experiment platform is small in size and light in weight.

3. The low-power multi-class motor series experimental platform of claim 1, characterized in that: the power supply voltage of the low-voltage motor controller (1) is not more than 36V, and the power supply voltage range of the universal motor controller (2) is 0-400V;

the motor controllers (1 and 2) can be externally connected with a permanent magnet synchronous motor PMSM, a brushless direct current motor BLDC, an asynchronous motor and a resistance-inductance load.

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