Constant-power control circuit of electric vibrator during cement production

Abstract

The invention discloses a constant-power control circuit of an electric vibrator during cement production. The electric vibrator comprises the control circuit; the control circuit comprises a pulse transformer circuit and a thyristor circuit, and is characterized by further comprising a detection calculation circuit for preprocessing a control signal, wherein the detection calculation circuit comprises an operational amplifier and a transformer; the control signal is input into the in-phase input end of the operational amplifier; the input end of the transformer is connected with a power supply homologous with the electric vibrator, and the output end of the transformer is rectified and stabilized, and then connected to the inverted input end of the operational amplifier; and the output end of the operational amplifier is connected with the inverted input end of the operational amplifier through a resistor R4. In the constant-power control circuit, due to the detection calculation circuit for processing the control signal, an output signal is in direct proportion to the control signal and in inverse proportion to the variation of a power signal of the electric vibrator, so that constant-power control over the electric vibrator is realized; therefore, a discharging amount of the electric vibrator cannot be changed with the fluctuation of an external power supply; and the quality of matched raw cement can be improved.

Description

technical field [0001] The present invention relates to a constant power control circuit of an electric vibrator in cement production, and more specifically relates to a power circuit for controlling the electric vibrator by detecting the power supply of the electric vibrator and generating a negative feedback signal for controlling the electric vibrator. The constant power control circuit of the vibration machine. Background technique [0002] The electric vibrator is an indispensable equipment in the batching process of cement production, as shown in the attached manual Figure 4 As shown, the batching system of cement production generally adopts an electronic scale or a microcomputer scale with relatively accurate control to calibrate the raw meal that slips from the electric vibration machine, so as to ensure that the proportion of various raw materials in the cement mixed raw meal meets the requirements. Whether the workability of the electric vibrator is stable will di...

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Problems solved by technology

[0003] Although the above control method plays a role in adjusting the amplitude of the electric vibrator, it does not consider the impact of the AC power (usually 380 volts) used by the electric vibrator. Due to the relatively high power consumption in the cement production process Large, the industrial electricity used is not constant, but has large fluctuations

A veteran worker who has worked in a cement factory for decades found by observing the production records: For the same production equipment, the quality and pass rate of cement produced at night are much better than those produced during the day. Through research and demonstration, it is finally found and determined that the reason for the above situation is that the stability of the external power supply at night is much better than that during the day, and the change of the external power supply causes the electric vibrator to not work at a constant power, thus As a result, the amplitude and frequency of the electric vibrator will change with the change of the external power supply, which will cause changes in the cutting of cement raw materials, and ultimately affect the quality of the produced cement.

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