Plastic jetting-moulding machine of drive current of adjustable motor, control apparatus and method
A driving current and control device technology, applied in the direction of AC motor control, control system, electrical components, etc., can solve the problems of not being able to record the change of the driving current, and not being able to know the change of the driving current 106 of the motor 105 in real time, etc.
Inactive Publication Date: 2008-05-14
宁波南嵘机械有限公司
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However, this combination uses the feedback signal 104 output by each operating mechanism 113 as the main calculation parameter of the control unit 101, and it is impossible to know the change of the driving current 106 of the motor 105 in real time, and the control unit 101 cannot record the driving current 106. current changes, and calculate the optimal adjustment parameters
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[0033] figure 2 An injection molding machine 2 is shown, which includes a motor 20 , a hydraulic pump 21 , an oil tank 22 , a flow proportional control valve 23 , a control device 25 and various operating mechanisms 24 . The electric motor 20 is used to output a torque 26 . The hydraulic pump 21 is connected to the motor 20 , and draws hydraulic oil from the oil tank 22 in response to a torque 26 and outputs a flow rate 27 . The flow proportional control valve 23 receives the control signal 250 to distribute the flow 27 to each operating mechanism 24 . The control device 25 then adjusts the magnitude of the driving current 254 for driving the motor 20 according to the adjustment signal 252 . The adjusted driving current 254 can change the magnitude of the torque 26 and the magnitude of the corresponding flow 27 .
[0034] The control device 25 of the injection molding machine 2 mentioned in the preceding paragraph includes a frequency converter 251 , a current measurement ...
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The invention discloses a plastic injection machine, a control device and the method for drive current of adjustable motor. The plastic injection machine comprises a hydraulic pressure pump. The motor is used to output moment. The hydraulic pressure pump is connected with the motor to cope with the output flow rate of the motor. The control device is connected with the motor and comprises a frequency converter, a current measuring unit and a processor. The motor is provided with driven current by the frequency converter. The driven currents are measured and a digital current signal is produced by the current measuring unit. The digital current signal is received and an adjusting signal is output by the processor according to the digital current signal. The adjusting signal is received and the driven current value is adjusted by the frequency converter according to the adjusting signal. The adjusted driven current can change the moment value and the output flow rate.
Description
technical field [0001] The invention relates to an injection molding machine; in particular, it relates to a control device and method for adjusting the driving current of a motor of the injection molding machine. Background technique [0002] Generally, each mechanism in the common injection molding machine on the market is controlled by hydraulic pressure. For example, the feeding screw is driven by a hydraulic motor to rotate, and the injection mechanism, mold closing mechanism and mold clamping mechanism are all driven by hydraulic cylinders to produce forward and backward movements. The aforementioned mechanisms related to hydraulic control all require hydraulic oil with different flows and speeds. [0003] Such as figure 1 As shown, the current relatively advanced injection molding machine 1 basically includes a control unit 101, a frequency converter 103, a motor 105, a hydraulic oil pump 107, an oil tank 109, a flow proportional control valve 111, and various opera...
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Inventor 叶正吉
Owner 宁波南嵘机械有限公司