Voice coil motor, method and device for controlling voice coil motor

A method for controlling a voice coil motor, wherein the voice coil motor comprises an inner coil module and an outer coil module, and the method comprises:

• installing the inner coil module inside the outer coil module;
• forming an air gap for the inner coil module to move between the inner coil module and the outer coil module;
• driving the outer coil module of the voice coil motor to generate an outer coil electromagnetic force;
• determining an inner coil current instruction according to an expectation force instruction and force feedback information sent by an executing mechanism of the voice coil motor;
• driving the inner coil module of the voice coil motor to generate an inner coil electromagnetic force according to the inner coil current instruction;
• and
• enabling the executing mechanism to generate a motor acting force according to the outer coil electromagnetic force and the inner coil electromagnetic force,
• wherein the driving the outer coil module of the voice coil motor to generate the outer coil electromagnetic force comprises:
• determining an outer coil force instruction according to the expectation force instruction;
• determining an outer coil current instruction according to the outer coil force instruction;
• obtaining outer coil current feedback information, and determining an outer coil drive instruction according to the outer coil current instruction and the outer coil current feedback information;
• and
• driving the outer coil module to generate the outer coil electromagnetic force according to the outer coil drive instruction, or
• wherein the driving the inner coil module of the voice coil motor to generate the inner coil electromagnetic force according to the inner coil current instruction comprises:
• obtaining inner coil current feedback information;
• determining an inner coil drive instruction according to the inner coil current instruction and the inner coil current feedback information;
• and
• driving the inner coil module of the voice coil motor to generate the inner coil electromagnetic force according to the inner coil drive instruction, force.