Non-inductive closed-loop starting method and device for BLDCM in miniature hybrid power system

Abstract

The invention discloses a non-inductive closed-loop starting method and device for a BLDCM in a miniature hybrid power system. According to the method, an inductance method is adopted for detecting the initial position of a rotor, a single-phase detection acceleration method is adopted for starting acceleration, then engine ignition starting is carried out, and a rotor position detection closed loop in a BLDCM non-inductive starting process in a micro hybrid power system is achieved; and a PID algorithm is adopted to control the starting current of the motor, so that the anti-interference capability and the load robustness in the starting process of the motor are improved. According to the non-inductive closed-loop starting method and device for the BLDCM in the micro hybrid power system,rotor position detection closed-loop and torque control in the process that the BLDCM is accelerated from the static state to the counter electromotive force operation state can be achieved, the anti-interference capability and the load robustness of the sensorless BLDCM starting process in the micro hybrid power system are improved, and automatic self-starting ignition of the micro hybrid power system is achieved.

Description

technical field [0001] The invention belongs to the technical field of micro-hybrid systems, and in particular relates to a non-inductive start of a motor, in particular to a non-inductive closed-loop start method and device for a BLDCM in a micro-hybrid system. Background technique [0002] The Brushless Direct Current Motor (BLDCM) in the micro-hybrid system generally uses Hall magneto-sensitive, electromagnetic or photoelectric position sensors to detect the rotor position signal. However, the use of position sensors increases the volume and cost of the motor, and it is difficult to maintain; at the same time, it cannot adapt to harsh working environments such as high temperature and high humidity; operational reliability. In addition, the installation accuracy of the position sensor will also affect the running performance of the motor, which increases the difficulty of the production process. Therefore, canceling the position sensor has become a research hotspot in th...

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Problems solved by technology

[0003] In the prior art, there are many ways of BLDCM non-inductive control of the micro-hybrid system, such as the inductance method, which can use six sets of detection pulses to detect the initial position of the rotor when the motor is in a static state, but during the acceleration process of the motor, due to the detection The shortening of the time and the addition of driving pulses make it impossible to detect the rotor position during the acceleration of the motor, resulting in BLDCM prone to commutation errors, poor anti-interference ability, and poor load robustness. The starting success rate in the dynamic system is greatly reduced

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