摘要:
An electronically commutated asynchronous motor (12) features a stator (202), a short-circuit rotor (204), a controller (FOR 20) for field-oriented regulation of the motor (12), a sensor magnet (274) in thermally conductive connection with the short-circuit rotor (204), a rotor position sensor (14A; 18; 18′) arranged at a predetermined distance (d) from the sensor magnet (274) to generate an output signal (HALL, U, U1, U2) that is dependent upon the spatial orientation of the sensor magnet (274), and a temperature evaluation apparatus (CALC_T 44) configured to ascertain, during operation, from the sensor output signal (HALL, U, U1, U2), a temperature value (T) that characterizes a temperature (T_SM, T_S) in the motor (12).
摘要翻译:电子换向异步电动机(12)具有定子(202),短路转子(204),用于电动机(12)的场定向调节的控制器(FOR 20),热传导磁体 与所述短路转子(204)的导电连接,与所述传感器磁体(274)以预定距离(d)布置的转子位置传感器(14A; 18; 18'),以产生输出信号(HALL,U, U1,U2),其依赖于传感器磁体(274)的空间取向;以及温度评估装置(CALC_T 44),其被配置为在操作期间从传感器输出信号(HALL,U,U 1, U 2),表征电动机(12)中的温度(T_SM,T_S)的温度值(T)。
摘要:
An electric fan has a drive motor having a fan rotor, an apparatus for generating a rotation speed signal (n_i), an apparatus for generating a power level signal (P_i) that represents power consumed; a first regulator (n_RGL) for regulating the rotation speed signal (n_i) to a predefined target value (n_s); a second regulator (P_RGL) for regulating the power level signal (P_i) to a predefined power level signal target value (P_s) that corresponds to a predefined minimum consumed power level (P_min), where the first regulator (n_RGL) and the second regulator (P_RGL) apply at least one control output signal (SW) to the drive motor and interact in such a way that, during operation, the at least one control value (SW) in a first state is determined by the first regulator (n_RGL), and in a second state is determined by the second regulator (n_RGL).
摘要:
An electric fan has a drive motor having a fan rotor, an apparatus for generating a rotation speed signal (n_i), an apparatus for generating a power level signal (P_i) that represents power consumed; a first regulator (n_RGL) for regulating the rotation speed signal (n_i) to a predefined target value (n_s); a second regulator (P_RGL) for regulating the power level signal (P_i) to a predefined power level signal target value (P_s) that corresponds to a predefined minimum consumed power level (P_min), where the first regulator (n_RGL) and the second regulator (P_RGL) apply at least one control output signal (SW) to the drive motor and interact in such a way that, during operation, the at least one control value (SW) in a first state is determined by the first regulator (n_RGL), and in a second state is determined by the second regulator (n_RGL).
摘要:
Embodiments relate to systems and methods for reducing jitter caused by frequency modulation of a clock signal including modulating the frequency of the clock signal based on a predetermined modulation signal m(t), and compensating an accumulated jitter J(t) caused by the frequency modulation of the clock signal such that an absolute value of the accumulated jitter J(t) never exceeds a predetermined jitter limit Jlim.
摘要:
A mixed-flow fan features a housing (42); an impeller (43) journaled rotatably with respect to the housing, and equipped with fan blades (54); a generally cylindrical air conduit (50) defined between the fan housing and the impeller, the fan blades extending into the air conduit in order, during operation, to transport air; an external-rotor motor (75) having an internal stator (100) and an external rotor (74) which includes a tubular ferromagnetic yoke (63) partly embedded in material of the impeller. A cup-shaped yoke (72) fits into a central cavity (68) of the tubular yoke (63) and accommodates a permanent magnet arrangement (66) which interacts with the stator. The tubular yoke (63) and the cup-shaped yoke (72) together serve as a magnetic return path for the external-rotor motor. The structure minimizes damage during final assembly, and simplifies insertion of balancing weights.
摘要:
A circuit board (20) is equipped with at least one conductor path (22) and a contact element (44). The latter is adapted to mechanically engage and electrically contact an electrical conductor (66). In the region of a conductor path (22), the circuit board (20) has passthrough orifices (24, 26, 28, 30, 32). The contact element (44) has a base part (46) and feet (34, 36, 38, 40, 42) which press-fit into the orifices (24 to 32) of the circuit board (20). The contact element (44) has a contact tongue (54) that is resiliently articulated on the base part (46) and clamps the electrical conductor (66). This makes possible a secure connection from the electrical conductor (66) to the circuit board (20), e.g. for connecting a device having a large current demand.
摘要:
A method for correcting errors in a coordinate measuring machine having a measuring head which is adapted to move in at least two different spatial directions. Measuring scales and measuring lines are assigned to each spatial direction. The measuring lines of different spatial directions intersect, and correction values are determined along the measuring lines at predetermined values of the scales in order to correct for elastic and/or geometric errors of the scales and/or of the guiding mechanism for moving the measuring head. According to one aspect of the invention, the correction values determined along a measuring line of a first spatial direction are modified such that the modified correction value of this measuring line assumes a predetermined value at the point of intersection with a first measuring line of a second spatial direction.
摘要:
An analog-to-digital converter for successively and approximately converting an analog input signal into a digital output signal includes at least one comparator having a linear input module and an output module. The analog input signal is compared with a compare signal supplied by a digital-to-analog converter and supplies a comparator output signal for adjusting a clocked successive approximation register. The digital value temporarily stored in the successive approximation register is converted into the analog compare signal by the digital-to-analog converter. The inventive converter also includes an acceleration circuit supplying a reversible clock signal to the cocked successive approximation register according to at least one overload detector signal that detects overload of an appurtenant linear input module in the comparator.
摘要:
A seat for a bicycle has a seat body and a seat post. The seat body a front end, a rear end, a bottom and multiple reinforced ribs. The rear end has a width larger than that of the front end. The reinforced ribs are formed on the bottom of the seat body. The seat post is integrally formed on and protrudes from the bottom of the seat body. With the seat post being integrally formed on the seat body, the manufacturing process for the seat is simplified and the cost therefor is accordingly lowered.
摘要:
A digital recording disk, such as an audio or a video disk, has a central bearing area, a data medium layer having at least one data track thereon, and a protective layer covering a face of reading of said disk, said protective layer is provided with damages, causing disturbances during a reading operation. Said damages are repaired by removing the protective layer in a section between a central bearing area and a circumferential edge of said disk to a level at which disturbances during reading do not appear. Said removing of said protective layer is carried out in directions cutting across the data track path.