Stepper motor stepper motor selected power supply voltage value is higher than voltage needed for the biggest 10%50%, the percentage for Kt, Ke, and voltage drop within the system, drive current value should be the energy needed for transfer application, keep in mind that drives the output voltage and the power supply voltage is different, and thus drive the output current and input current is not the same, in order to determine the appropriate power supply current, the demand for accounting the use all the power demand, add 5%, according to the formula I = P/V accounting can get the current value. Power is too low, the first is easy to cause the motor output torque is insufficient or even throw step, the second is easy to damage the driver and switch power supply, the power of the detailed selection and system requirements of users, and is closely related to the system configuration, from the principle of stepping motor power as abundance as possible, in the practical application demand due to the cost of production in users tend to meet the requirements under the condition of required power as small as possible. On many occasions, as a result of the step motor current voltage is higher, for example, some stepper motor 8 a maximum output current, voltage 325 v, coupled with the magnetic shielding shell not choose aluminum alloy shell, thus form the interference of high active receiver system, make it unable to work, and interfere with the power supply, especially in high frequency, may form control system of single chip microcomputer and PC can't normal communication, serious form single-chip computer crashed, to use normal form the difficulty, thus interference problems necessary to be solved. Stepper motor power supply interference problem solving method is as follows: 1, equipped with power supply filters, cut pollution on ac power. 2, using the shielded wire reduce outside interference to himself, or his (The power cord)The rest of the world. 3、“ One-point earthing & throughout; Principle, will power match wave filter, stepper drives (PEGround)（Drive and chassis backplane insulation)And control PULSE PULSE -DIR - pulse and directionShort answer after the lead wire, electrical grounding line, drive and motor between cable protection cover, the shielding wire are received on the casing wall ground pole, and requires good contacts. 4, try to increase the control cable and power cable,L, N), motor drive line (U, V, W)Between interval, prevent cross, for example, we in the process of biaxial drive system is in the same case of drives to install two position, a drive plate in the front, the other is the later, and these lead to short on the structure arrangement.
