Contactor driving circuit and device based on constant magnetic induction intensity

The invention relates to the technical field of contactor driving, in particular to a contactor driving circuit and device based on constant magnetic induction intensity. A contactor drive circuit based on constant magnetic induction intensity comprises an input power supply, a coil drive circuit and a contactor which are sequentially connected, the contactor is connected with a coil current detection module and a magnetic circuit magnetic induction intensity detection module, and a current controller controls the coil drive circuit through PWM signals. The magnetic induction intensity detection module with the Hall element is arranged in the circuit, control over electromagnetic force is converted into control over magnetic induction intensity, control over constant magnetic induction intensity is achieved by adjusting the current of the contactor, and compared with a traditional scheme, automatic adjustment of driving current is achieved, and the control over constant magnetic induction intensity is achieve