Patent
Method and arrangement for control of direct current motor
TLDR
In this article, a method for controlling a direct current motor (30) in one or several fan units (43, 20, 21), each comprising a fan, is presented. But this method is limited to the case of a single motor.Abstract:
The present invention relates to a method for control of a direct current motor (30) in one or several fan units (43, 20, 21), each comprising a fan, which method comprises: generation of a control signal from a first control unit (22) which is external in relation to the said fan unit (43, 20, 21); transmission of the said control signal to the said fan unit (43, 20, 21); reception of the transmitted control signal in the said fan unit (43, 20, 21); interpretation of the said control signal in a second control unit (26) which is arranged in association with the said fan unit (43, 20, 21); and generation, in the said second control unit (26), of a supply signal for the said direct current motor (30), on the basis of the control signal generated by the first control unit (22) and received in the fan unit and on the basis of a supply voltage. According to the invention, the method comprises transmission of the control signal together with the supply voltage over a shared communication link (44), with the control signal being superposed on the supply voltage. The invention also relates to an arrangement for such control. By means of the invention, improved control is obtained of a motor that can be utilized in a ventilated seat in a vehicle.read more
Citations
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References
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Patent
Fan speed monitoring system for determining the speed of a PWM fan
TL;DR: In this paper, a fan speed monitoring system for interfacing a fan, including a fan drive and sensing circuit for maintaining the voltage of the fan's TFSC pin above a minimum voltage level, is presented.
Patent
Vehicle seat ventilation system
TL;DR: In this article, a vehicle seat ventilating system comprising at least one fan (4 ) arranged in the seat (7 ) and controlled by a central control unit (1) and an electric control unit(3) associated with each fan for actuating the respective fan in response to control signals from the central controller unit ( 1), wherein each electronic control (3) is arranged at the respective fans (4), each of the fans ( 4 ) has its own electronic control unit and is connected to the central seat control unit by a data line (2) that transmits control
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Patent
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