Why can operate properly when stepping motor at low speed, but above a certain speed won't be able to start, accompanied by whistler? Stepper motor has a technical parameters: no-load start frequency, the stepper motor under no-load condition can normal boot pulse frequency, if the pulse frequency is higher than the value, the motor does not start properly, may be lost or blocked. In the load cases, start frequency should be lower. If you want to make the motor to achieve high-speed rotation, the pulse frequency should be to accelerate the process, namely the start frequency is low, and then in a certain high frequency acceleration to want (Motor speed from low speed to high speed)。 Suggested user: start frequency = 2 * runs a circle number of required pulse deceleration curve: in addition to the above reasons, producing whistlers may also be caused by heavy load and high speed when the motor output torque will decline, can't meet the requirements of the load motor blocked in turn, and whistlers will changes with the frequency of high and low, the solution is to reduce speed or replace a bigger torque motor. Also motor in high speed running after the stop there will be a short whistlers, this is caused by the phase current chopping, simply will drive panel automatically half flow is set to be valid. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone:
