CN204425215U - Electric machine control system - Google Patents

Abstract

The utility model provides a motor control system, which includes a controller and several power components. Each power component includes a motor driver and a motor. The power components are all electrically connected to the controller. The motor driver and the motor are electrically connected to the controller. The motor is electrically connected, the controller sends a target speed signal to the motor driver, the motor driver detects the actual speed of the motor in real time, and the motor driver outputs to the motor after receiving the target speed signal. 1. Correction speed drive amount. Through the connection relationship between the controller, motor driver and motor, the closed-loop motor control method is used, so that the motor can follow the control commands issued by the controller well, so the control effect is ideal.

Description

motor control system

technical field

The utility model relates to a power system, in particular to a motor control system.

Background technique

Brushless DC motor, due to its advantages of no brush, low interference, low noise, smooth operation, long life, low maintenance cost, etc., is usually used in equipment with high control requirements and high speed, such as aircraft models, wireless Man-machines and other equipment that strictly control the motor speed and the speed reaches a high speed.

In the prior art, the application of brushless DC motors in aircraft models, unmanned aerial vehicles, etc., mostly adopts an open-loop control method to control the motor speed. We know that in order to achieve good flight stability and maneuverability, the motor speed needs to follow the speed value set by the controller in real time.

However, when it is actually applied to an aircraft, the rotational speed of the motor is easily affected by factors in the external environment such as turbulence, airflow, and vibration. If only through the open-loop control method adopted in the prior art, the control command received by the motor driver is the throttle amount, which can only realize the rapid increase of the speed when the motor speed is lower than the target speed, and the actual required target speed value cannot be set, and When the actual speed of the motor is higher than the target speed, rapid deceleration cannot be achieved due to the high rotational kinetic energy of the propeller and the motor, and good flight stability and maneuverability cannot be obtained. Therefore, the motor speed of the aircraft is easily disturbed, cannot follow the control command well, and the control effect is not ideal.

Utility model content

The technical problem to be solved by the utility model is to provide a motor control system in order to overcome the defect that the motor cannot follow the control command well when controlling the motor speed in the prior art, resulting in an unsatisfactory control effect.

The utility model solves the problems of the technologies described above through the following technical solutions:

A motor control system, characterized in that it includes a controller and several power components, each power component includes a motor driver and a motor, the power components are all electrically connected to the controller, the motor driver and the The motor is electrically connected, the controller sends a target speed signal to the motor driver, the motor driver detects the actual speed of the motor in real time, and the motor driver outputs the target speed signal to the motor after receiving the target speed signal 1. Calibrate the rotational speed driving amount.

In this solution, the target speed signal represents a target speed value, and the motor driver will set a control parameter according to the difference between the target speed value and the actual speed value, and output a corrected speed drive to the motor by means of closed-loop control. The driving quantity of corrected speed represents a corrected speed value, and the motor adjusts its own speed according to the corrected speed value to achieve the target speed value, thereby realizing the following control of the motor, which can well follow the control command issued by the controller, so the control The effect is ideal.

Preferably, the number of the power components is 4, 6 or 8.

Preferably, the motor is a brushless DC motor. The brushless DC motor is abbreviated as BLDC (Brushless DC Motor), which has the characteristics of a DC brushed motor. The brushless DC motor can further improve the control accuracy of its speed with its own superior characteristics.

Preferably, when the motor control system is applied to an aircraft, it can make the aircraft exhibit excellent flight stability and maneuverability.

Preferably, the motor control system further includes a bus, and the power components are electrically connected to the controller through the bus.

The positive and progressive effect of the utility model lies in: through the connection relationship between the controller, the motor driver and the motor, the closed-loop control method of the motor is adopted, so that the motor can well follow the control command sent by the controller, so the control effect is ideal.

Description of drawings

FIG. 1 is a schematic structural diagram of a motor control system of the present invention.

Detailed ways

A preferred embodiment is given below, and the utility model is described more clearly and completely in conjunction with the accompanying drawings.

The present embodiment provides a kind of motor control system, and described motor control system is applied in the aircraft, and as shown in Figure 1, comprises a controller 1, 6 power assemblies and a bus 2, obviously, to each power assembly needs For power supply, that is to say, there will be a power line 3, each power assembly includes a motor driver 4 and a brushless DC motor 5, and the power assemblies are electrically connected to the controller 1 through the bus 2, so The motor driver 4 is electrically connected to the brushless DC motor 5, the controller 1 sends a target speed signal to the motor driver 4, and the motor driver 4 detects the actual speed of the brushless DC motor 5 in real time, The motor driver 4 outputs a corrected rotational speed driving amount to the brushless DC motor 5 after receiving the target rotational speed signal.

In order to enable those skilled in the art to understand the structure of the motor control system more clearly, the control process of this embodiment is further explained: the controller sends a target speed signal to the motor driver, and the motor driver obtains the target speed value. The driver detects the speed of the brushless DC motor in real time, and sets a control parameter. When the actual speed of the brushless DC motor is higher than the target speed, it means that the current speed of the brushless DC motor is too fast, and brakes are needed to quickly reduce the speed. How much to reduce the speed is determined by the corrected speed drive output by the motor driver to follow the target speed sent by the controller; and when the actual speed of the brushless DC motor is lower than the target speed, it means that the current speed of the brushless DC motor is too slow , it is necessary to increase the speed by increasing the throttle.

Therefore, this embodiment can enable the aircraft to reach the target speed value smoothly and quickly when the motor speed is greater than or lower than the target speed, so that the speed of the motor can follow the control command issued by the controller in real time, and the control effect is good. It also enables the aircraft to obtain good flight stability and maneuverability.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present utility model, but these changes and modifications all fall within the protection scope of the present utility model.

Claims (5)

1. an electric machine control system, it is characterized in that, comprise a controller and some Power Components, each Power Component comprises a motor driver and a motor, described Power Component is all electrically connected with described controller, described motor driver and the electrical connection of described motor, described controller sends a rotating speed of target signal to described motor driver, described motor driver detects the actual speed of described motor in real time, and described motor driver receives the backward described motor of described rotating speed of target signal and exports a correction rotating speed drive volume.

2. electric machine control system as claimed in claim 1, it is characterized in that, the quantity of described Power Component is 4,6 or 8.

3. electric machine control system as claimed in claim 1, it is characterized in that, described motor is brshless DC motor.

4. electric machine control system as claimed in claim 1, it is characterized in that, described electric machine control system is applied in aircraft.

5. as the electric machine control system in claim 1-4 as described in any one, it is characterized in that, described electric machine control system also comprises a bus, and described Power Component is all electrically connected with described controller by described bus.