What are the six wires of the step motor
Stepper motor wiring has 4 lines, six lines and eight wire, line 4 is the most simple of A and B phase winding wire, 8 wire mainly to customers convenient application design, if the user needs to run will be used on high speed parallel connection mode, if the user is mainly used in low speed high torque circumstance, can be used in series connection mode, 6 line mainly is suitable for single polarity control applications, if the drive is not A single polarity drive, you can tap the middle line dangling don't can, at this moment motor series work mode
1, single polarity stepper motor, two coil, there are five or six lines, namely in the middle of a coil adds a tap, five line can be seen as six lines between the root of the two coil line and together. Because in the middle of a coil with the tap, half of the current in a coil take different flow, but then just use half of the motor coil. 2, a bipolar step motor is an electric motor with two coils and four lines. The current is either positive or negative in the two coils, so it is called bipolar. 3, bipolar stepper motor and single polarity of stepper motor, is due to a few decades ago, stepper motor drive circuit is more expensive because it is over, if using bipolar drive circuit, the circuit a lot more expensive than single polarity, so many years ago, single polarity of the stepper motor. But as the cost of stepping into the motor drives lower and lower, coupled with the emergence of some very cheap drive chips, the dual-polarity motors are more used. At the same time, the bipolar motor because a forward and reverse current flow through the circle line, the application of high efficiency, most of the time is because of the single polarity motor USES only half of the coil, so the efficiency is low. But in places where costs are stricter, single polarity motors are widely used.
Phase number: the logarithm of the excitation coils of different polar N and S fields. Commonly used m said. Take count: the number needed to complete the periodic changes in A magnetic field pulses or conducting state expressed with n, or refers to the motor turns A pitch Angle pulse number, four phase motor, for example, there are four phase four operation modes is AB - BC - CD - DA - AB, four phase eight beats operation mode is A - AB - B - BC - C - CD - D - DA - a. interval Angle: corresponds to A pulse signal, motor rotor turning angular displacement with theta. Theta = 360 degree (the number of rotors), in the case of the normal two and four phases, the rotor teeth are 50 teeth motor. Four run time interval Angle is theta = 360 degrees/(50 * 4) = 1.8 degrees (commonly known as a whole step), eight beats runtime interval Angle is theta = 360 degrees/(50 * 8) = 0.9 degrees (commonly known as half step). Positioning: torque motor in the condition of no electricity, motor rotor's own locking torque (caused by the tooth harmonic magnetic field and mechanical error) : static torque motor in the rated under the action of static electricity, the machine does not make the rotary motion, locking torque of motor shaft. This moment is the standard for measuring the volume of the motor (geometrical size), not the driver voltage and the driver power source. Although the static torque is proportional to the electromagnetic excitation ampere turn, with the air gap between the rotor teeth, but excessive use reduced the air gap, increase the excitation ampere turns to improve static moment is not desirable, it will cause heating of the motor and the mechanical noise.
