Transistor-controlled electronic load control circuit
A technology for controlling circuits and electronic loads, applied in program control, computer control, general control systems, etc., can solve the problems of slow loading speed and long time of electronic loads, and achieve improved anti-interference ability, strong anti-interference ability, The effect of fast loading speed
Active Publication Date: 2015-05-13
SHENZHEN ZHONGKEYUAN ELECTRONICS
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Problems solved by technology
When the electronic load is switched from the OFF state to the ON state, this control method will cause the output of the error comparison operational amplifier to rise from 0V to the rated drive voltage. This process takes a long time and slows down the loading speed of the electronic load.
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[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0020] In the embodiment of the transistor-controlled electronic load control circuit of the present invention, the schematic structural diagram of the transistor-controlled electronic load control circuit is as follows: figure 1 shown. figure 1 Among them, the transistor-controlled electronic load control circuit includes a microprocessor 1, a DA control unit 2, an error operational amplifier circuit 3, a constant current and constan...
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The invention provides a transistor-controlled electronic load control circuit; the transistor-controlled electronic load control circuit comprises a microprocessor, a DA control unit, an error operation amplifying circuit, a constant current constant voltage mode converting circuit and a load state control circuit; the DA control unit is connected with the microprocessor and used for outputting a current control voltage; an input end of the error operation amplifying circuit is connected with the DA control unit; one end of the constant current constant voltage mode converting circuit is connected with an output end of the error operation amplifying circuit, and used for switching between a constant current mode and a constant voltage mode; one end of the load state control circuit is connected with the other end of the constant current constant voltage mode converting circuit, and used for controlling a switching state of the electronic load; the other end of the load state control circuit is grounded. The implementation of the provided transistor-controlled electronic load control circuit has the advantages of being able to remove interference, strong in anti-jamming capability, and faster in loading speed of the electronic load.
Description
technical field [0001] The invention relates to the field of load control, in particular to a transistor-controlled electronic load control circuit. Background technique [0002] At present, the conversion between the two modes of DC electronic load CC (constant current) and CV (constant voltage) is to use relays or electronic switches to perform signal switching at the input end of the error comparison operational amplifier, and the current or voltage controls the reference signal (hereinafter referred to as the "DA") and the current or voltage acquisition signal are switched to the input terminal of the error comparison operational amplifier after being switched by a relay or an electronic switch. Using relays to switch between CC mode and CV mode has high cost and cannot be miniaturized, and there is a certain electromagnetic interference problem at the moment of relay action; using electronic switches to switch between CC mode and CV mode has high cost and requires a lev...
Claims
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Login to View More IPC IPC(8): G05B19/042
CPCG05B19/042
Inventor张军吴涛黄明雄石利军庞成
OwnerSHENZHEN ZHONGKEYUAN ELECTRONICS