Multifunctional motor control circuit and control method

Abstract

The invention discloses a multifunctional motor control circuit and a control method, and the control circuit comprises a main winding module which is used for the switching of a star winding and a triangular winding of a motor; a standby winding module, used for redundant backup of the main winding module; a bridge arm module, used for amplifying the power of the main/standby winding module and providing current for the main/standby winding module; and a control module, used for detecting the real-time state of the motor and controlling the main/standby winding module and the bridge arm module so as to realize switching between star-shaped connection and triangular connection of the winding. The control module detects the rotating speed and the running state of the motor in real time; when the main winding module of the motor is abnormal, the circuit switches to the standby winding module; and according to the rotating speed of the motor, the main/standby winding module is controlled to be switched into star connection or triangular connection. According to the invention, the safe switching of the motor winding between the star connection or the triangular connection is realized according to the operation condition, and meanwhile, the redundant backup winding is added, so that the applicability of the motor is improved, and the reliability of the motor is improved.

Description

technical field [0001] The invention belongs to the field of motor technology and control, and in particular relates to a multifunctional motor control circuit and a control method. Background technique [0002] With the rapid development of social economy, people have higher and higher requirements for the quality of life and living environment. Nowadays, environmental pollution is becoming more and more serious. Vehicle exhaust emissions are an important factor causing environmental pollution. New energy vehicles are an application Cars powered by electric energy have little environmental pollution and adapt to the current environmental protection trend, so the number of users is gradually increasing. One of the core components of new energy vehicles is the motor. [0003] The stator winding connection mode of the motor is divided into delta connection and star connection. Under the same voltage and current input, the stator winding adopts the star connection mode of the ...

AI Technical Summary

Problems solved by technology

The disadvantage is that the motor power is reduced

The use of triangular stator windings helps to increase the power of the motor. The disadvantages are the large starting current, the high voltage (380V) of the windings, and the high insulation level.

Most of the existing motors use star-shaped or delta-shaped windings alone, so that the motor cannot exert its maximum effect, and the output of the motor in each frequency band cannot meet the requirements of practical applications. It can only be discarded according to the predetermined needs. Selecting a motor without part of its performance seriously restricts the application and reduces the progress of research and development

In addition, the current motor does not have a redundant switching function. Once some windings of the motor burn out, the motor may be scrapped, and the motor needs to be replaced. Not only the failure rate is high, the reliability is low, and the maintenance cost is also increased.

[0004] Based on the above description, there is an urgent need for a multifunctional motor control circuit and control method to solve the problem that the motor can only use star or delta winding alone, and the winding mode cannot be switched according to the operating conditions, and the motor has no redundant backup. Problems with high failure rate and low reliability

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