公开(公告)号：US20140009095A1

公开(公告)日：2014-01-09

申请号：US13933473

申请日：2013-07-02

Applicant: Dyson Technology Limited

Inventor： Stephen GREETHAM ,  David John HAWKER

IPC: H02P1/04

Abstract: A method of controlling a brushless motor that includes sensing a temperature and using the sensed temperature to define a current limit. A lower current limit is then defined for a lower sensed temperature. A winding of the motor is sequentially energised and de-energised, with the winding being de-energised when current in the winding exceeds the defined current limit.

Abstract translation: 一种控制无刷电动机的方法，包括感测温度并使用所感测的温度来限定电流限制。 然后为较低的感测温度定义较低的电流限制。 电机的绕组被顺序地通电并断电，当绕组中的电流超过限定的电流极限时，绕组被断电。

公开(公告)号：US20140366286A1

公开(公告)日：2014-12-18

申请号：US14304619

申请日：2014-06-13

Applicant: Dyson Technology Limited

Inventor： Libo ZHENG ,  Yongji ZHOU ,  James Douglas CHISHOLM ,  David John HAWKER

IPC: A47L11/40 ,  A47L9/28

CPC classification number: A47L11/4011 ,  A47L9/2831 ,  A47L9/2847 ,  A47L9/2857 ,  A47L11/4008 ,  A47L11/4069

Abstract: A surface cleaning appliance having a cleaner head that includes an agitator and a motor for driving the agitator. The appliance includes a switch coupling the motor to a supply voltage, a voltage sensor for measuring the magnitude of the supply voltage, a current sensor for measuring the magnitude of current through the motor, and a controller configured to output a PWM signal for controlling the switch. The controller then adjusts the duty cycle of the PWM signal in response to changes in the supply voltage and in response to changes in the current through the motor.

Abstract translation: 一种具有清洁器头部的表面清洁器具，其包括搅拌器和用于驱动搅拌器的马达。 该器具包括将电动机耦合到电源电压的开关，用于测量电源电压大小的电压传感器，用于测量通过电动机的电流的大小的电流传感器，以及控制器，被配置为输出PWM信号， 开关。 然后，控制器响应于电源电压的变化并响应于通过电动机的电流的变化来调整PWM信号的占空比。