公开(公告)号：US09407085B2

公开(公告)日：2016-08-02

申请号：US14321437

申请日：2014-07-01

Applicant: Dyson Technology Limited

Inventor： Libo Zheng ,  Yongji Zhou ,  Tuncay Celik

IPC: H02H3/24 ,  H02H7/08 ,  H02P6/08 ,  H02M1/32 ,  H02M1/36 ,  H02M7/5387

CPC classification number: H02H7/08 ,  H02M1/32 ,  H02M1/36 ,  H02M7/5387 ,  H02P6/085 ,  H02P29/0241

Abstract: A controller for a brushless motor that is configured to operate in normal mode or under-voltage mode. When operating in normal mode, the controller generates control signals for exciting a winding of the motor, monitors the magnitude of an input voltage, and switches to under-voltage mode in the event that the input voltage drops below an under-voltage threshold. When operating in under-voltage mode, the controller suspends excitation of the winding, monitors the magnitude of the input voltage, monitors the magnitude of a supply voltage used to power the controller, switches to normal mode in the event that the input voltage exceeds a restart threshold, and resets itself in the event that the supply voltage drops below a brown-out threshold.

Abstract translation: 用于无刷电动机的控制器，其被配置为在正常模式或欠压模式下操作。 当在正常模式下工作时，控制器产生用于激励电动机的绕组的控制信号，监视输入电压的大小，并且在输入电压降到低于欠电压阈值的情况下切换到欠电压模式。 当在欠电压模式下工作时，控制器暂停绕组的激励，监视输入电压的大小，监视用于为控制器供电的电源电压的大小，在输入电压超过 重新启动阈值，并在电源电压低于欠压阈值的情况下自行复位。

公开(公告)号：US09801516B2

公开(公告)日：2017-10-31

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.

公开(公告)号：US09431931B2

公开(公告)日：2016-08-30

申请号：US14304465

申请日：2014-06-13

Applicant: Dyson Technology Limited

Inventor： Yongji Zhou ,  Libo Zheng ,  Hanping Dai

IPC: H02P1/24 ,  H02P6/00 ,  H02P7/29 ,  H02P6/18

CPC classification number: H02P6/28 ,  H02P6/15 ,  H02P6/182 ,  H02P7/29

Abstract: A controller for a brushless motor that includes a PWM module configured in half-bridge or full-bridge mode. The PWM module outputs control signals for controlling the excitation of a winding of the motor, and one of the duty cycle and the period of the PWM module defines a time at which the winding is commutated.

Abstract translation: 一种用于无刷电动机的控制器，其包括以半桥或全桥模式配置的PWM模块。 PWM模块输出用于控制电机绕组励磁的控制信号，PWM模块的占空比和周期中的一个定义了绕组整流的时间。

公开(公告)号：US09438150B2

公开(公告)日：2016-09-06

申请号：US14304599

申请日：2014-06-13

Applicant: Dyson Technology Limited

Inventor： Libo Zheng ,  Yongji Zhou ,  Tuncay Celik

IPC: H01R39/46 ,  H02P6/14 ,  H02P29/00

CPC classification number: H02P6/157 ,  H02P29/10

Abstract: A method of controlling a brushless permanent-magnet motor. The method includes commutating a winding of the motor at times relative to zero-crossings of back EMF in the winding. Commutation is then advanced when the motor operates over a first speed range, and commutation is retarded when the motor operates over a second speed range higher than that of the first speed range.

Abstract translation: 一种控制无刷永磁电动机的方法。 该方法包括相对于绕组中反电动势的过零点的时间将电动机的绕组换向。 当马达在第一速度范围内运行时，换向被提升，当马达在高于第一速度范围的第二速度范围内运行时换向延迟。