Linear drive device

A linear drive device, comprising:

• a stator, wherein the stator comprises a stator body and a plurality of coils fixed to the stator body and arranged sequentially along an extending direction of the stator body, and at least a part of the plurality of coils are arranged in series or parallel;
• a rotor, wherein the rotor comprises a rotor body supported on the stator body and forming a sliding connection with the stator body, a magnetic steel fixed on the rotor body, and the magnetic steel is spaced from and arranged opposite to the coil;
• a first position feedback unit fixed on a side of the rotor body close to the stator;
• a plurality of drivers, wherein the plurality of coils arranged in series or parallel are electrically connected to one of the plurality of drivers, while remaining coils not arranged in series or parallel are divided into a plurality of groups, and a plurality of coils in each of the plurality of groups that are not arranged in series or parallel are electrically connected to the other driver in the plurality of drivers;
• wherein the plurality of coils arranged in series or parallel comprises MN coils, the plurality of coils in each of the plurality of groups that are not arranged in series or parallel includes N coils, the M is greater than or equal to 2, and the N is greater than or equal to 3;
• a controller electrically connected to the plurality of drivers, and the controller is configured to obtain position information of the rotor by the first position feedback unit.