What is the principle of the three-phase six-step motor?
The three-phase motor of stepping motor is a-b-c-a... It is. It's a whole shot. The three-phase six is A half beat between every two shots, and the order of power is A - AB - b-bc-c-ca - A... It is. From the above, you can see that the three-phase six-shot running step Angle is one half of the three-phase three-step Angle. It can serve as a segmenting Angle.
Working principle: The structure: the rotor of the motor has a lot of small teeth, the stator tooth has three excitation winding resistance, and its geometrical axis is staggered along the axis of the rotor tooth. 0, 1/3 て て, 2/3, (the distance between adjacent two rotor tooth axis as the pitch て), namely A opposite tooth 1 qi, tooth 2 B and stagger to 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)
Torque: once the electricity, will produce magnetic field between the stator (magnetic flux Ф) when the rotor and stator stagger Angle force F and Ф (d/d theta) 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 = N, N I/R, I for the excitation winding ampere turn to take the number of turns (current) R magnetic resistance. Torque and motor torque force = * radius effective volume * * flux density is proportional to the number of ampere turns (only consider linear state) as a result, 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 step motor is an open loop controlling element which converts the electrical pulse signal into angular displacement or line displacement. In the case of the overload, motor speed, stop position depends only on the pulse signal frequency and pulse number, and not affected by load change, when the stepper driver receives a pulse signal, it is driving a stepper motor according to set the direction of a fixed Angle, known as the "step Angle", its rotation is based on the Angle of the fixed step by step. It can control the amount of angular displacement by controlling the number of pulses, so as to achieve accurate positioning. At the same time, the speed and acceleration of the motor can be controlled by controlling the pulse frequency to achieve the goal of speed adjustment.
The step motor is a discrete value control motor that converts the electrical impulse excitation signal into the corresponding angular displacement or line displacement. This motor moves one step at a time when it enters an electrical pulse, so it is called the pulse motor. The rotor of a stepper motor is made from a flexible magnetic material or permanent magnetic material, and the stator is fitted with a multi-phase control winding. Its excitation signal has dc pulse, square wave, multiphase square wave and logical sequence. The step distance and velocity of the step motor are not affected by voltage fluctuation, ambient temperature and load change, but only with pulse frequency. Changing the pulse frequency can adjust the speed of the motor in a large range. As a result, the step motor is used to open loop digital control, which greatly simplifies the control system. Stepper motor with position detection device can also be used for closed-loop digital control, commonly used in printers, and tape reader, counters, drawing machine, CNC machine tools, valve actuator, positioning platform and digital to analog converter, etc. There are various kinds of stepper motors, and they are divided into rotating stepper motors and linear stepper motors
