Fully automatic three-phase motor power saver
A technology for three-phase motors and power savers, which is applied in the direction of AC motor control, electrical components, control systems, etc., can solve problems such as power waste, and achieve the effects of small size, convenient installation, and light weight
Inactive Publication Date: 2014-01-01
任丽南
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Problems solved by technology
[0004] At present, the motors selected by the mechanical equipment commonly used in factories are matched according to the maximum power required by the machinery. In actual use, the time of full load is very small, such as stamping machine tools, stretching equipment, injection molding machinery, etc., all work intermittently. Motors often run under no-load or light-load conditions, resulting in waste of electricity
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[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0023] refer to figure 1 As shown, a fully automatic three-phase motor power saver includes a three-phase current sampling circuit U1, a signal amplification circuit U2, a trigger and power output control circuit U3 connected in sequence; the input terminal of the three-phase current sampling circuit U1 is connected to the three-phase Connected to the power supply, one end of the thyristor VT3 of the trigger and power output control circuit U3 is connected to the three-phase motor M; it also includes a power supply circuit U4 connected to the three-phase circuit, and the power supply circuit U4 is connected to the signal amplification circuit U2.
[0024] refer to figure 2 As shown, the signal amplifying circuit U2 includes an inverting operation chip ICIA and an inverting operation chip ICIB, and the output end of the inverting op...
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The invention discloses a fully automatic three-phase motor power saver which comprises a three-phase current sampling circuit, a signal amplifying circuit and a triggering and power output controlling circuit. The three-phase current sampling circuit, the signal amplifying circuit and the triggering and power output controlling circuit are sequentially connected. The input end of the three-phase current sampling circuit is connected with a three-phase power supply. One end of a thyristor of the triggering and power output controlling circuit is connected with a three-phase motor. According to the fully automatic three-phase motor power saver, the three-phase current sampling circuit, the signal amplifying circuit and the triggering and power output controlling circuit are adopted, through the triggering and power output controlling circuit, the conduction angle of the thyristor of the triggering and power output controlling circuit can be changed, so that voltage applied on the motor is made to be increased or reduced.
Description
technical field [0001] The invention relates to the technical field of power savers, in particular to a fully automatic three-phase motor power saver. Background technique [0002] In industrial and agricultural production, three-phase motors are widely used as power. Electric motors are the main power machinery for electrification and also the main energy-consuming equipment in the power grid. In China, about 1 billion AC motors are put into use, and the power consumption accounts for 60% of the total load of the power grid and 70% of the entire industrial power consumption. According to the report of China's authoritative energy agency, about 60% of the motors in my country operate under the under-load state which is 60% lower than the design rated load, and up to 30% of the power consumption of the motors operating in this state is wasted. , my country has formulated the "Energy Conservation Law of the People's Republic of China" and related preferential policies such as...
Claims
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Inventor 任丽南
Owner 任丽南