Closed-loop feedback automatic feeding device controlled by single-chip
An automatic feeding and control device technology, applied in computer control, damping device, program control, etc., can solve the problems of low power and inability to apply high-power circuits, and achieve the effect of ensuring stability and safety
Inactive Publication Date: 2009-01-28
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology
The digital potentiometers currently available on the market have very small power, and the currents that can pass are all in the milliampere level, which cannot be used in high-power circuits.
Method used
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[0015] refer to figure 1 , the automatic feeding control device through the motor current closed-loop feedback, including the first thyristor Q1 used to control the amplitude of the electromagnetic vibrator, and the control pole connected to the first thyristor Q1 is used to control the conduction of the thyristor corner RC circuit, figure 1 Among them, the output A and output B are used to connect the electromagnetic vibrator, the resistor R1 and the capacitor C2 protect the first thyristor Q1, MYG is a piezoresistor, and the resistor RA1 of the RC circuit is a high-power digital adjustable resistor , refer to figure 2 , the high-power digitally adjustable resistor RA1 includes a resistor array 1 formed by several resistors connected in series, several bidirectional thyristors T connected in parallel to both ends of the several resistors, and used to trigger the several bidirectional Several zero-crossing trigger optocouplers 2 that are turned on or off by the thyristor, t...
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A control device which realizes the self-acting feed via the closed loop feedback of the motor current; such control device comprises a one-board computer, a hall current sensor, the first triode ac switch and a RC circuit. The first triode ac switch is used to control the amplitude of the vibrator; the RC circuit is connected with the control pole of the first triode ac switch. The resistance of the RC circuit adopts the large power digital and adjustable resistor which is composed of a couple of the zero passage triggered optical coupler, the triode ac switch and the resistance array. The hall current sensor is used to examine the motor current which is transferred into the digital signals. The one-board computer is used to control the resistance array so as to achieve the impedance variation of the large power adjustable resistor. Thus, the self-feed control is realized. This utility model can be widely used in the automatically feeding occasion where the motor load control is based. For example, the utility model is of far reaching importance to the automation of such equipment as the breaker and the pulverizer.
Description
technical field [0001] The invention relates to a control device for an automatic feeding device, in particular to a closed-loop feedback automatic feeding device controlled by a single-chip microcomputer, which belongs to the application of single-chip microcomputer technology in engineering control fields such as crushing and crushing. Background technique [0002] Before the application date of the invention, the general vibrating feeding device manually samples the motor current, and manually adjusts the variable resistance value in the control circuit of the vibrating feeder according to the current sampling result, so as to adjust the conduction of the bidirectional thyristor. The angle controls the purpose of the vibration feeder amplitude. The digital potentiometers currently available on the market have very small power, and the currents that can pass are all in the milliampere level, which cannot be applied to high-power circuits. Contents of the invention [00...
Claims
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IPC IPC(8): G05B19/042G05B5/01
Inventor 刘学平牛强汪劲松段广洪向东毛乐山夏必忠张硕潘晓勇
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV