Multi-path electric heating PWM (Pulse Width Modulation) control system
A control system and electric heating technology, applied in general control systems, control/regulation systems, electrical program control, etc., can solve the problems of large development workload and high cost, and achieve a small development workload, low cost, and simplified structure. Effect
Inactive Publication Date: 2015-05-20
佛山市汉隆自动化技术有限公司
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At present, such a function can be realized by using the PCI output card of the industrial computer and the output control of the medium-sized PLC, but its disadvantages are that the cost is high and the development workload is relatively large.
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[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0021] In the embodiment of the multi-channel electric heating PWM control system of the present invention, the structural diagram of the multi-channel electric heating PWM control system is as follows image 3 shown. image 3 Among them, the multi-channel electric heating PWM control system includes a host computer 1, a temperature acquisition unit 2, a PWM adjustment unit 3 and a solid state relay unit 4, wherein the temperature acquisition unit 2 collects temper...
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The invention provides a multi-path electric heating PWM (Pulse Width Modulation) control system. The system is characterized by comprising an upper computer, a temperature acqusition unit, a PWM adjustment unit and a solid-state relay unit, wherein the temperature acqusition unit is used for acquiring a temperature signal and transmitting to the upper computer through a first RS485 bus; after the upper computer is used for performing operation and then transmitting an operation result to the PWM adjustment unit through a second RS485 bus, the duty ratio of turn-on of the solid-state relay unit is controlled by the PWM adjustment unit in real time; the PWM adjustment unit comprises a plurality of PWM modules which are connected in sequence; the solid-state relay unit comprises a plurality of solid-state relay units; each PWM module is connected with the solid-state relay subunit at the corresponding position respectively. The multi-path electric heating PWM control system has the beneficial effects of low cost and small development workload.
Description
technical field [0001] The invention relates to the field of PWM regulation, in particular to a multi-channel electric heating PWM control system. Background technique [0002] In the traditional multi-point temperature control system, the upper computer drives the solid-state relay through the I / O output point, and the upper computer needs to control the underlying solid-state relay in real time. It is difficult to program, and the cost of board configuration and wiring is high. not flexible. Due to the real-time control of the output point, the refresh rate is required to be fast enough, so the computer can only use the output board using PCI. At present, such a function can be realized by using the PCI output card of the industrial computer and the output control of the medium-sized PLC, but its disadvantages are that the cost is high and the development workload is relatively large. figure 1 It is a structural diagram of a multi-point temperature centralized control sy...
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IPC IPC(8): G05B19/418
CPCY02P90/02G05B19/4186
Inventor 何伟东梁志荣甄锡宁
Owner 佛山市汉隆自动化技术有限公司