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公开(公告)号：US09859824B2
公开(公告)日：2018-01-02
申请号：US15028344
申请日：2014-10-07
Applicant: Dyson Technology Limited
Inventor： Stephen Greetham , Andrew Charlton Clothier
Abstract: An AC/AC boost converter comprising input terminals, output terminals, an inductor, a bridge arm comprising a pair of bi-directional switches, a capacitor and a control circuit for controlling the switches. The bridge arm and the capacitor are connected in parallel across the output terminals. The inductor has a first end connected to one of the input terminals and a second end connected to one of an end and a junction of the bridge arm, the junction being located between the two switches. Another of the input terminals is then connected to the other of the end and the junction of the bridge arm. An AC power supply supplies an AC input voltage at the input terminals, and the control circuit controls the switches of the bridge arm such that an AC output voltage is supplied at the output terminals, the AC output voltage being greater than the AC input voltage.
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公开(公告)号：US10756653B2
公开(公告)日：2020-08-25
申请号：US13933473
申请日：2013-07-02
Applicant: Dyson Technology Limited
Inventor： Stephen Greetham , David John Hawker
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 energized and de-energized, with the winding being de-energized when current in the winding exceeds the defined current limit.
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公开(公告)号：US09160255B2
公开(公告)日：2015-10-13
申请号：US13933896
申请日：2013-07-02
Applicant: Dyson Technology Limited
Inventor： Stephen Greetham
Abstract: A method of preheating a brushless motor that includes sequentially energizing and de-energizing a phase winding over one or more drive periods. The phase winding is energized in the same direction throughout each drive period so as to lock a rotor of the motor at an aligned position.
Abstract translation: 一种预热无刷电动机的方法，其包括在一个或多个驱动周期上顺序地激励和断电相绕组。 在每个驱动周期中，相绕组在相同的方向通电，以将电动机的转子锁定在对准位置。
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公开(公告)号：US11682914B2
公开(公告)日：2023-06-20
申请号：US16463767
申请日：2017-11-23
Applicant: Dyson Technology Limited
Inventor： Stephen Greetham
CPC classification number: H02J7/0024 , B60L58/19 , H01M10/0445 , B60L58/18 , B60Y2200/91 , H01M2220/20 , Y02T10/70
Abstract: A battery system comprising positive and negative charge-discharge terminals, first and second batteries, first and second unidirectional switches, and a bridging switch. The first battery and the first unidirectional switch are connected in series across the charge-discharge terminals such that the first unidirectional switch provides a conductive path from the positive charge-discharge terminal to a positive terminal of the first battery. The second battery and the second unidirectional switch are connected in series across the charge-discharge terminals such that the second unidirectional switch provides a conductive path from the negative terminal of the second battery to the negative charge-discharge terminal. The batteries and the bridging switch are connected in series across the charge-discharge terminals, with the bridging switch being located between the positive terminal of the first battery and the negative terminal of the second battery.
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