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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L6480 데이터시트(PDF) 37 Page - STMicroelectronics |
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L6480 데이터시트(HTML) 37 Page - STMicroelectronics |
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37 / 73 page  L6480 Phase current control Doc ID 023278 Rev 3 37/73 Figure 16. Current distortion and compensation The optimization can be enabled setting high the LSPD_OPT bit in the MIN_SPEED register (Section 9.1.8) and is active in a speed range from zero to MIN_SPEED. When low speed optimization is enabled, speed profile minimum speed is forced to zero. 7.4 BEMF compensation Using the speed information, a compensation curve is added to the amplitude of the voltage waveform applied to the motor winding in order to compensate the BEMF variations during acceleration and deceleration (see Figure 17). The compensation curve is approximated by a stacked line with a starting slope (ST_SLP) when speed is lower than a programmable threshold speed (INT_SPEED) and a fine slope (FN_SLP_ACC and FN_SLP_DEC) when speed is greater than the threshold speed (see sections 9.1.11, 9.1.12, 9.1.13 and 9.1.14). |
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