By the circular distributor, frequency/voltage conversion and voltage detection, PI adjustment, dc chopper, pulse width modulation, current detection, current control, drive, power amplifier bridge before units such as stepping motor driven system; Stepper pulse and direction of the external input signal by annular distributor into the electricity order of stepping motor control signal to drive the power amplifier bridge work, and then control the step motor running; By the frequency/voltage conversion and voltage detection, PI adjustment, dc chopper voltage closed loop control system, to supply dc voltage proportional integral control of step motor, ensure that the dc voltage follow up frequency boost control voltage required by a given and change; By the current detection and control of the two departments current control link, to control the output current of the power amplifier bridge, and within a certain range to make motor current with the motor running speed improvement and progress, to realize frequency booster current control effect. To improve and overcome the current rise of frequency control of pressure of the above problems, this paper puts forward and designs a new kind of litres of frequency booster type stepping motor driven method, this method will increase current control technology and frequency booster technology organic union, drive voltage and current can be controlled, thus progress could drive and reliability. 1. Voltage open-loop control, vulnerable to the power supply voltage fluctuation influence; 2. Resistance is very small, because motor drive during low speed running must be small to not over current, output voltage and low voltage winding motor makes quick responsiveness is poorer; 3. Drive adaptability is bad, should be adjusted according to different types of motor. 4. Motor winding current is determined by the driver output voltage and the winding resistance, so the current vulnerable environment (Power supply voltage and motor parameters, etc. )Impact, which leads to the decline fever or torque; Because the stepping motor system has good localization function and lower capital, and other need to correct positioning in the field of economical nc processing, manufacturing and testing equipment has been widely used. Thought in the existing stepping electric drive technology, control technology and higher frequency boost pressure control technology is able to effectively reduce the stepper motor in the operation of low frequency vibration and the noise of the main control method, the former is based on step motor phase current to ground sinusoidal control, step motor to smaller units by from the Angle of operation (Mechanical step away from the Angle of a small percentage of a fraction or)To reduce low frequency vibration, but the technology is relatively complex, especially when the motor phase number is large (Such as the five phase)Is not easy to realize and high capital; L frequency boost control technology is by reducing the motor phase winding of the power supply voltage during low speed running and then the method to reduce the low frequency vibration and litres of booster control at present is mainly open loop control. Stepper motor is an electrical pulse signal into angular displacement or linear motion actuator driven by stepping motor and its power devices constitute an open-loop motion system, when the system is to accept an electrical pulse signal, a stepper motor shaft move turned a certain Angle or certain linear distance, electrical pulse input, the motor shaft turning Angle or the more linear displacement; At the same time, the higher the frequency of the input pulses, the speed of the motor rotor displacement or the faster speed. The technology has been successfully applied to control three-phase stepper motor drive YK3HB3722MA. But because the stepping motor itself inherent in the low frequency vibration title title, makes the application of the stepper motor is limited by some in the vibration and noise are requesting occasions; How to through the low frequency vibration of the stepper motor drive control technology to reduce and inhibition, is an important title in the applications of stepper motor. Drive after using the technology, improved the original liter booster drive control, through the adoption of the voltage feedback and pid control, realized the closed-loop litres of frequency control of pressure, eliminate the influence of external environment to drive output, improved reliability; At the same time, introduce the current closed-loop control technology and frequency boost pressure control, realized the frequency litres flow control, increase the flexibility of litres of frequency control of pressure and the output current of controllability, progress fast drive function and adaptability to the motor, and the reliability of the device further progress. 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:
