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Hi All,, Does anyone have any algorithm for speed control of stepper motor ?? When i run the stepper it steps nicely but gets overheated.. Any suggestion for current limiting or to improve torque ?? Any help would be great. Thankzz && Bye -Rocknmoon
The motor steps nicely but it donot give sufficient torque and becomes heated up in few minutes. It is common for stepper motors to drive them with a very high current that after a short time (milliseconds - depending on motor) drops to a "holding current". This method gives more torque and less heat. Erik
Whith Your MOSFET-swithes You don't have any real control about the current. There are a lot of drivers for stepping motors on the market (Infineon, STM, or Ericsson) wich have half step or microstep mode will give You maximal torque. The drivers provide an internal control loop for the current. See on Ericsons website for applications and hints.
See: http://www.cs.uiowa.edu/~jones/step/ This is a particularly good website on stepper motors.