Double closed-loop-control direct-current speed regulation system based on phase-sensitive detection circuit
A double closed-loop control, phase-sensitive detection technology, applied in the field of electronics, can solve the problems of the influence of mechanical speed and low stability of the speed control system, and achieve the effects of improving production efficiency, smooth reversal, and preventing damage.
Inactive Publication Date: 2015-10-21
CHENGDU JIESHENG TECH CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the defects that the current speed regulation system used in production machinery is not stable enough to affect the speed of the machinery, and to provide a double closed-loop control system based on a phase-sensitive detection circuit with good dynamic and static performance and high stability. DC speed control system
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[0020] Such as figure 1 As shown, the present invention consists of a transformer T, a rectification filter circuit, a double closed-loop control circuit connected to the output end of the rectification filter circuit, a fine-tuning circuit connected to the double closed-loop control circuit, a voltage stabilizing circuit connected to the secondary side of the transformer T, and a stabilizing circuit An operational amplifier circuit connected to the output terminal of the voltage circuit, an output circuit connected to the output terminal of the operational amplifier circuit, and a phase-sensitive detection circuit connected in series between the primary side of the transformer T and the operational amplifier circuit; the double closed-loop control circuit and The trimming circuits are all connected to the primary side of the transformer T.
[0021] The double closed-loop control circuit is composed of control chip U1, field effect transistor MOS, one end is connected to the r...
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The invention discloses a DC speed regulation system based on dual-closed loop control, which is characterized by comprising a transformer T, a rectifier filter circuit, a dual-closed loop control circuit connected with the output end of the rectifier filter circuit, a fine adjustment circuit connected with the dual-closed loop control circuit, a voltage-stabilizing circuit connected with the secondary side of the transformer T, an operational amplifier circuit connected with the output end of the voltage-stabilizing circuit, and an output circuit connected with the output end of the operational amplifier circuit, wherein the dual-closed loop control circuit and the fine adjustment circuit are both connected with the primary side of the transformer T. thus, influences on the rotation speed of the motor by power grid interference can be restrained, starting, braking and reverse rotation of the motor are smoother, and the production efficiency is improved.
Description
technical field [0001] The invention relates to the field of electronics, in particular to a double closed-loop control DC speed regulation system based on a phase sensitive detection circuit. Background technique [0002] At present, mechanization has been used in many production activities. Due to the requirements of mechanical processing and operation, the motor is often in the transition process of starting, braking, and reversing, so the time in the starting and braking process is largely It determines the production efficiency of the machine. In order to shorten this part of the time, the speed negative feedback single closed-loop speed regulation system of the proportional integral regulator is used to realize it at present. However, the dynamic and static performance of the existing speed control system is not very good, the stability is not high, and it is easy to be disturbed by the power grid, thereby affecting the speed of the machine. Contents of the inventio...
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IPC IPC(8): H02P7/28
Inventor 雷明方
Owner CHENGDU JIESHENG TECH CO LTD