Inductive load driving circuit and driving current detection method and device

• Main Authors: WAN QIANGSHENG, QI KEGUANG, CHEN ZHIPENG
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2022
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; MECHANICAL ENGINEERING; PHYSICS; TAPS; TESTING; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

The invention provides a driving circuit of an inductive load and a detection method and device of driving current. The driving circuit comprises a control unit, a driving unit, a current detection sub-circuit, a fly-wheel diode and a power supply. Wherein the current detection sub-circuit comprises a detection resistor, a voltage reduction unit and a general operational amplifier; one end of the detection resistor is connected with the driving signal output end of the driving unit, and the other end of the detection resistor is used for being connected with the driving signal input end of the inductive load; the first input end of the voltage reduction unit and the second input end of the voltage reduction unit are connected with the two ends of the detection resistor respectively. The first input end of the general operational amplifier is connected with the first output end of the voltage reduction unit, the second input end of the general operational amplifier is connected with the second output end of th