WebThe harmonics with odd orders in the cogging torque are then canceled. The P s /P r combinations for AM-FRPM machines with cogging torque harmonic suppression are listed in Table 1. For 6 s /8 p AM-FRPM machines, the prominent harmonics of the cogging torque are the multiples of three and the odd harmonics cancel each other, as … WebNov 12, 2012 · Cogging torque in fractional pitch PMSM is minimized when manufacturing induced errors are also minimized. This paper investigates additional cogging torque …
基于磁场调制原理的齿槽转矩研究_百度文库
WebMay 10, 2024 · To reduce cogging torque and torque ripple, several effective methods are introduced in this article, which are mainly based on the reduction or offset of corresponding airgap flux harmonics. The cogging torque reduction effects and torque performances of these methods are compared. Among them, newly proposed N/S-parts offset method is … WebThe first, called ripple torque, is produced from the harmonic content of the current and voltage waveforms in the machine [4, 5, 6]. The second, called cogging torque, is due to the physical ... Cogging torque adds a ripple component to the desired constant output torque from the machine. This can produce vibration and noise which, in turn ... clarksville ark weather 40/29
An In-Phase Unit Slot-Opening Shift Method for Cogging Torque …
WebThis confirms the assumption made in Section 3.2.2 that the DC offset in the FPM calculated cogging torque was caused by the saturation effect at loaded conditions. At the rated load condition, an extra harmonic appears to the cogging torque, as shown in Figure 17a. This 1st order harmonic caused the uneven amplitude of the cogging torque ripples. WebCogging torque is produced predominantly as a result of fringing fields in the magnet interpole and slot regions [5], a typical cogging torque waveform being shown in Fig. 1. It can be shown that in a motor having full pole-pitched magnets the instantaneous cogging torque is zero when a) the interpole axes WebIn Figure3the cogging torque waveforms and harmonic spectra of the APMMs with 20, 30 and 60 stator core segments are reported. The harmonic spectrum of the APMM with 20 stator core segments has a wide 2nd harmonic and a 4th and 6th harmonics with amplitudes of 0.165 and 0.069 Nm, respectively. download fifa world cup 2014