Source：Shengda Yu Published：2014-04-22 Clicks：13290
Who better?
The electronic motor controller is through the motor control of a friction clutch with "full" operation of the driving wheel contact (contact clutch) to control the motor start stop and speed control, the slow response clutch control, performance and control also depends on the quality and extent of clutch. The electronic motor adopts the non-contact type clutch, control still needs by controlling the coupling force between the two non contact clutch (such as magnetic) to the kinetic energy of motor spindle to the other side (sewing machine main shaft side). Although two kinds of clutch principle is different, but they all have one thing in common, that is "driving the driving wheel and the sewing machine motor rotation speed of the side" is through a "soft connection", in the sewing machine stop time and load torque variation, speed stability will have a process, and the speed will have a certain fluctuation, especially in the sewing machine low speed operation (such as shear line process). This is the electronic motor speed and motor control mainly due to the slow response of the.
Servo motor controller due to motor can achieve precise torque control, speed control and position control can be realized through direct digital control. This sewing machine torque control (such as changes in Buzin: I. thickness), speed control (such as high speed sewing), and position control (such as the stop pin) can be directly through the motor shaft drive to the spindle of the sewing machine, the performance, stability and speed of response is significantly better than that of electronic motor controller. Especially the use of the servo motor of high performance rare earth permanent magnetic materials, the output is big, small inertia, stop the dynamic performance is particularly good, help to improve productivity and quality sewing.
Servo control system is the key of energy saving
Electronic components electronic motor control system of the parts are the same, such as the system control panel, three automatic electromagnet, synchronous sensor and pedal sensor etc.. Two electronic components differing only by the controller.
The electronic motor controller does not control for induction motor start stop and speed, but only to control the clutch to achieve start stop and speed control. Therefore, the system only needs to use a simple microcontroller (Microprocessor) to control a current or voltage control loop to achieve closed-loop control of the clutch, the motor's start stop and speed control. The controller uses fewer components, simple manufacture, low cost. But do not control the motor controller and electrical motor, and the motor is the main component of consumption of electricity, motor running in uncontrolled conditions, its efficiency is very low; no matter what the sewing machine motor work condition, whether high or low speed, sewing thick material or thin material (sewing thick material sewing machine the need for greater Li Ju, and sewing thin material requires fewer Li Ju), motor needs to run at full speed. In addition, the sewing machine in practical work is about L / 4 ~ 1 / 3 time is in the stopped state (such as sewing feeding time), but the motor electric motor at this time still to "full" in operation. In this way, the electronic motor innocent waste a lot of energy.
Servo motor controller and electronic motor control is completely different, it uses digital signal processor (DSP) or high performance micro controller (Microcontroller) and a power electronic converter to achieve the signal to the energy conversion, so as to realize the motor start and stop, speed and torque control. The whole controller with many components, higher requirements on the manufacturing process, the cost is higher. However, the servo motor control system using the new "energy saving" control algorithm, the control of digital processors, the input current of a motor to produce useful torque, the motor has been working in the most efficient state; servo motor control system, according to the torque demand different, so that the motor out of it sewing machine torque needed. When the sewing machine to stop status, servo motor controller will make the motor stopped, the servo system almost no electric energy consumption.