Dust collector and control method, device and system for brushless DC motor

• Main Authors: WU PIANPIAN, WANG HAODONG
• Format: Patent
• Language: Chinese; English
• Published: 23.10.2018
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention discloses a dust collector and a control method, device and system for a brushless DC motor. The method comprises the following steps: obtaining a duty ratio of a PWM control signal of the brushless DC motor in each PWM control period; adjusting the frequency of the PWM control signal according to the duty ratios; controlling the brushless DC motor according to the adjusted PWM control signal. The control method for the brushless DC motor can increase the maximum rotational speed of the brushless DC motor, also can realize the ultra-high speed operation of the brushless DC motor,and can reduce the switching loss of a power device in the control system of the brushless DC motor, and improves the drive efficiency of the control system. 本发明公开了种吸尘器、无刷直流电机的控制方法、装置和系统，其中，无刷直流电机的控制方法包括以下步骤：在每个PWM控制周期内获取无刷直流电机的PWM控制信号的占空比；根据占空比对PWM控制信号的频率进行调节；根据调节后的PWM控制信号对无刷直流电机进行控制。根据本发明的无刷直流电机的控制方法，不仅能够提高无刷直流电机的最高转速，实现无刷直流电机超高速运行，而且能够减少无刷直流电机的控制系统中功率器件的开关损耗，提高控制系统的驱动效率。