摘要:
The invention relates to a method for operating a brushless DC motor that is actuated by two full bridges (2) that comprise at least one passive freewheel by means of a pulse width modulation actuating signal. For this purpose, the pulse width modulation actuating signal is determined depending on a free wheel current path (if) in the passive free wheel.
摘要:
The invention relates to a method and a circuit arrangement for recording a current of a pulse-width modulation-controlled electric motor (10) which is powered by a constant voltage supply network and connectable thereto by means of a semiconductor switching device (18) and a shunt device (20), wherein the controll of the semiconductor switching device is modifiable by a voltage drop. According to said invention, the recording and adjustment of the motor current (I1) are carried out by detecting the voltage drop (USH) of the shunt device (20) with the aid of a scanning and holding element (T2, 26) and by deactivating the semiconductor switching device with respect to the scanning and holding element at least in a time-delay manner in such a way that a measurement value proportional to the actual current quantity (I1) of the motor is recorded and the adjustment is based thereon
摘要:
A method for generating a package identifier includes generating an image of a portion of a surface of a substrate of the package, generating a serial number of the package from the image, the serial number being based on at least one surface feature of the portion of the surface, and affixing a visual indicator on the package that is based on the serial number. The visual indicator affixed on the package is therefore based on the at least one surface feature of the package.
摘要:
The invention relates to a pressure compensation element (1) for compensating pressure of an inner chamber (2) of a housing, in particular an electric, motor or drive housing, a container or similar comprising, comprising an outer side (3) that is introduced into the wall (4) of the housing and a pressure compensation membrane (5). Said pressure compensation element (1) also has a cylindrical structure provided with a ventilation channel (6) that extends therethrough. Said cylindrical structure extends towards the outer side (3) in order to form a projection from the wall (4) of the housing, and said projection is delimited by an annular end surface (7) on which the membrane (5) is applied in a curved, dome-shaped form. Said pressure compensating element (1) also comprises a protective cover (8) that extends towards the outer side (3) at a distance in relation to the membrane (5) over the cylindrical structure.
摘要:
The invention relates to a method for establishing a common secret, characterized by the following features: in a first arbitration phase the first node (A) transmits (75) a first bit sequence, the second node (B) transmits (76) a second bit sequence, and the first node (A) and the second node (B) synchronously detect a resultant third bit sequence formed by place-by-place superimposition of the first bit sequence and the second bit sequence on the medium (10); in a second arbitration phase the first node (A) transmits the first bit sequence inverted place by place, the second node (B) transmits the second bit sequence inverted place by place, and the first node (A) and the second node (B) synchronously detect a resultant fourth bit sequence formed by place-by-place superimposition of the inverted first bit sequence and the inverted second bit sequence; the first node (A) and the second node (B) disjunctively combine the third bit sequence place by place with the fourth bit sequence to form a fifth bit sequence; the first node (A) and the second node (B) determine a first secret, in that the first node (A) deletes bits from the first bit sequence and the second node (B) deletes corresponding bits from the second bit sequence which according to the fifth bit sequence match in terms of numerical value.
摘要:
Disclosed is method for generating a secret or key in a network (20). Here, the network (20) comprises at least one first and one second member (21, 22) and a transmission channel (30) between at least the first and the second members (21, 22). The first and second members (21, 22) can each give at least one first value and one second value to the transmission channel (30). The first member (21) and/or the second member (22) prompt a first member value sequence and/or second member value sequence to be transmitted, substantially synchronously in relation to one another, on the transmission channel (30). On the basis of information about the first member value sequence and/or the second member value sequence, and on the basis of an overlap value sequence resulting from the overlapping of the first member value sequence with the second member value sequence on the transmission channel (30), the first member (21) and/or the second member (22) generate a common secret or a common key.