At present, the manufacturer of stepper motor is many, but has the professional and technical personnel, can be developed, developed at the factory are very few, most manufacturers only a, 20 people, even the most basic equipment. This gives the user in the product selection, use lots of trouble. Because reactive stepper motor working principle is simple. The following narrative principle of three-phase reactive stepper motor. 1, the structure of motor rotor is evenly distributed with a lot of small teeth, there are three excitation winding of the stator tooth, its geometrical axis respectively with the rotor teeth axis staggered in turn. ,1/3,2/3,(The distance between adjacent two rotor tooth axis as the pitch て said)As opposed to A tooth 1 qi, that is, A, B and tooth 2 to stagger the right 1/3 て, two-thirds of て tooth 3 C and stagger to the right, A 'as opposed to A tooth 5 qi, (A 'is A, 5 is the tooth 1)Common electric 2, rotation, such as A, B, C electricity or not, because the magnetic field effect, tooth alignment with A, 1 (The rotor is not subject to any force all of the following are the same)。 Such as common electric B, A, C not electricity, tooth, 2 B and should align with the rotor to the right to move through A third て, the tooth with 3 C deviation for 1/3 て, teeth 4 and A deviation (,-1/3)= 2/3。 Such as common electric C, A, B or not electricity, tooth 3 C and should align with the rotor and move to the right 1/3 て, as teeth 4 with A migration to A third て alignment. Same power as A, B, C or not electricity, tooth alignment with A, 4 rotor and move to the right before A third て such after A, B, C, A current state respectively, teeth 4 (1 before a tooth)Electricity, motor on each step,Each pulse)1/3て,向右旋转。 Electricity, motor is reversed. Can know is that the position and speed of the motor by the number of conductive (Pulse number)A one-to-one relationship with and frequency. The direction is determined by the conductive sequence. However, for the moment, smooth, noise and reduce perspective into consideration. A - often adoptedAB-B -BC-C -CA-A this conduction state, so that the original each one-third て て change for 1/6. Even with two phase current in different combinations, to make a third て て 1/12, 1/24 て, this is the basic theory on the basis of motor subdivision drive. (m -1)/m,1。 And conduction in a certain phase sequence of the motor can be controlled operations -—This is stepping motor rotating physical conditions. Should accord with the condition we can make any phase of the stepper motor in theory, for the sake of cost and other aspects, the market generally in phase two, three, four, five. Once 3, torque, motor power, will produce between the stator magnetic field (Magnetic flux Ф)When the rotor and stator stagger Angle force F and (dФ/ dθ)Is proportional to the magnetic flux Ф = S Br * S Br for flux density, S for permeability area is proportional to the Br L * D * L F as the core effective length, D for rotor diameter Br = I/R n. n. I for excitation winding ampere turn (Current take turns)R for the magnetic resistance. Torque and motor effective volume * * flux density is proportional to the number of ampere turns (Consider only the linear state)Therefore, effective volume, the greater the motor excitation, the greater the number of ampere turns on the air gap between rotor is smaller, the greater the motor torque, and vice versa. 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:
