Electric contact pressure gauge control circuit
The utility model relate to an electric contact pressure gauge control circuit. An electric contact pressure gauge is used in cooperation with electric devices (like a relay and a frequency converter), and the defects of the control mode lie in that a whole control circuit set is electromagnetically...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model relate to an electric contact pressure gauge control circuit. An electric contact pressure gauge is used in cooperation with electric devices (like a relay and a frequency converter), and the defects of the control mode lie in that a whole control circuit set is electromagnetically disturbed through relay control, reliability and measuring accuracy of a control system are affected and safety is lower. The electric contact pressure gauge control circuit comprises an electric contact pressure gauge and a solid relay. The electric contact pressure gauge comprises a high-voltage end, a low-voltage end and a pressure switch. The electric contact pressure gauge control circuit is characterized by further comprising an optoelectronic isolator LQ1, an optoelectronic isolator LQ2, a diode D1, a diode D2, a capacitor C1, a triode Q1, a triode Q2 and a triode Q3, the high-voltage end is connected with the negative electrode of the input end of the optoelectronic isolator LQ1, and the low-voltage end is |
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