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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN4158 датащи(PDF) 12 Page - STMicroelectronics |
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AN4158 датащи(HTML) 12 Page - STMicroelectronics |
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12 / 34 page  Phase current control in stepper motor driving AN4158 12/34 DocID023635 Rev 2 2 Phase current control in stepper motor driving In order to impose a constant current in the stepper motor phases, a current control algorithm must be implemented. The most common control system is shown in Figure 6 and is composed of: A power H-bridge used to drive the phase A current sensor (usually a shunt resistor) A controller driving the power bridge The motor phase electrical model. This system is applied to both phases. The motor phase electrical model is shown in Figure 7 and is made up of: The equivalent phase resistance RPh The equivalent phase inductance LPh The back electromotive force generator VBEMF. Figure 6. Current control system for each motor phase V BUS R SHUNT R Ph V BEMF L Ph Controller Motor phase equivalent circuit AM15108v1 |
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