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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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ST72141K2 数据表(PDF) 48 Page - STMicroelectronics |
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ST72141K2 数据表(HTML) 48 Page - STMicroelectronics |
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48 / 132 page  ST72141K 48/132 MOTOR CONTROLLER (Cont’d) Table 13. Demagnetisation (D) Event Generation (example for ZVD=0) HDM bit Meaning CPB bit = 1 (Even Σ) CPB bit = 0 (Odd Σ) 0 Software Mode (SDM bit =1 and HDM bit = 0) D = DS = Output Compare [MDREG, MTIM registers] 1 Hardware/Simulat- ed Mode (SDM bit = 1 and HDM bit = 1) D = DH + DS (Hardware detection or Output compare true) D = DH (Hardware detection only) (*) Note: This is a zoom to the additional voltage induced by the rotor (Back EMF) Z C Σ 2 HV HV/2 0V DS Z C Σ 2 HVV HV/2 0V DS Undershoot due to motor parasite or first Weak / null undershoot and (*) (*) sampling BEMF positive DS Z Σ 5 HVV HV/2 0V C (*) Z C Σ 2 HV HV/2 0V Z C Σ 2 HV HV/2 0V DS Undershoot due to motor parasite or first Weak / null undershoot and (*) (*) DH DS sampling BEMF positive DH Z Σ 5 HV HV/2 0V C (*) |
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