摘要:
A method for determining the rotor position of a synchronous machine operated in field-oriented manner, which has an effective inductivity that is dependent on the rotor position, the motor current being acquired, and the motor voltage being set with the aid of a pulse-width-modulation method, a signal which is in synchrony with the pulse-width-modulation frequency being superimposed on the motor voltage value to be set, values of the motor current being acquired in synchrony with the pulse-width modulation frequency, a current component induced by the superimposed voltage signal and a residual current component, i.e., fundamental wave component, being determined, the current component induced by the superimposed voltage signal being used for determining an estimated rotor angle position, whose phase error in relation to the actual rotor angle position is reduced by means of a flux model, the residual current component being supplied to a current controller.
摘要:
An open-loop or closed-loop control method for a converter which supplies an electric motor, wherein a current space vector is acquired as motor current, and the motor voltage, in particular a voltage space vector, is set, an induced voltage space vector UI is determined, which is forwarded to an integration element, a flux space vector being generated, whose angular position is perpendicular to the voltage space vector, the amount of the flux space vector corresponding to a predefined nominal value, the difference of the integration result and the flux space vector thus produced being used as feedback in the integration element.
摘要:
The invention relates to a control unit for flow regulation for use in an apparatus for testing the delivery of a dose of powder from a powder inhaler, a collecting tube for use in conjunction with the control unit and an apparatus containing the control unit and the collecting tube.
摘要:
System and method, including path sections, each path section including a supply line into which a medium-frequency current is able to be injected by an infeed assigned to the particular path section,each infeed encompassing a control circuit,a first one of the control circuits transmitting a clock signal for the synchronization of the additional infeeds thereto.
摘要:
A converter includes at least device(s) for sensing the currents fed to the electric motor powered by the converter, the device(s) for current detection being arranged inside the converter, and the signals of the device(s) being fed to a nonlinear filter, whose output signals are fed to an additional filter that is connected to an analog-to-digital converter.
摘要:
The method is used for transporting bodywork panels (12) of a vehicle by means of an endless transport device (10), equipped with a plurality of carrier units (16) that are spaced at intervals in the transport direction (14). In this case, provision is made for an associated group (18) of panels to be stacked on at least one carrier unit (16), for the group (18) of panels to be transported as far as a panel removal station (20) and in each case for an individual bodywork panel (12) to be removed by a panel separation device (22) at the panel removal station (20).
摘要:
A method for determining the rotor position of a synchronous machine operated in field-oriented manner, which has an effective inductivity that is dependent on the rotor position, the motor current being acquired, and the motor voltage being set with the aid of a pulse-width-modulation method, a signal which is in synchrony with the pulse-width-modulation frequency being superimposed on the motor voltage value to be set, values of the motor current being acquired in synchrony with the pulse-width modulation frequency, a current component induced by the superimposed voltage signal and a residual current component, i.e., fundamental wave component, being determined, the current component induced by the superimposed voltage signal being used for determining an estimated rotor angle position, whose phase error in relation to the actual rotor angle position is reduced by means of a flux model, the residual current component being supplied to a current controller.
摘要:
An airbag device comprising an airbag (1) made of a woven fabric which is fastened to a vehicle structure, in particular above a vehicle occupant, and which can be filled with gas by means of a gas generator and in the filled state extends in front of the vehicle occupant is characterized in that a cutout (31) is provided in the head impact region of the airbag fabric which the head of the vehicle occupant can penetrate, and this cutout is closed by a cover (4) that is decoupled from tensile stress in the airbag fabric.
摘要:
A converter includes at least device(s) for sensing the currents fed to the electric motor powered by the converter, the device(s) for current detection being arranged inside the converter, and the signals of the device(s) being fed to a nonlinear filter, whose output signals are fed to an additional filter that is connected to an analog-to-digital converter.
摘要:
System and method, including path sections, each path section including a supply line into which a medium-frequency current is able to be injected by an infeed assigned to the particular path section, each infeed encompassing a control circuit, a first one of the control circuits transmitting a clock signal for the synchronization of the additional infeeds thereto.