Series wound direct-current motor driving device and equipment

A series wound DC motor driving device, characterized in that it comprises:

• a series wound DC motor with a rated voltage;
• a DC power supply with a constant voltage corresponding to the rated voltage;
• and
• a chopper used for converting the constant voltage into a variable voltage and providing the variable voltage to the series wound DC motor based on control signals,
• wherein the chopper comprises m chopping units;
• each chopping unit comprises first power output ends and second power output ends and w switch control ends;
• the control signals comprise m unit control signals formed according to preset phase stagger rules and corresponding to the m chopping units separately;
• each unit control signal comprises w switch control signals corresponding to the w switch control ends in the corresponding chopping units;
• the w switch control ends are used for receiving the w switch control signals correspondingly;
• m pairs of power output terminals are formed at the m first power output ends and m second power output ends of the chopping units correspondingly;
• the series wound DC motor comprises:
• m pairs of electrical brushes;
• a stator comprising m pairs of main magnetic poles corresponding to m pairs of electrical brushes and an excitation winding portion, and
• a rotor arranged in the stator and comprising a plurality of armature windings connected with each other in a preset connecting mode;
• each pair of main magnetic poles includes an S main magnetic pole and an N main magnetic pole;
• the two adjacent main magnetic poles are different in polarity;
• the positions of two electrical brushes in each pair of electrical brushes are adjacent;
• each pair of electrical brushes comprises an S-pole corresponding electrical brush corresponding to the S main magnetic pole, and an N-pole corresponding electrical brush corresponding to the N main magnetic pole;
• the excitation winding portion comprises m excitation winding units;
• each excitation winding unit is formed by making insulated conductor strips composed of metal wires wrapped with insulating layers into excitation coils on at least one pair of main magnetic poles;
• each insulated conductor strip in each excitation winding unit includes one end and the other end;
• the m ends of the insulated conductor strips are electrically connected with m N-pole corresponding electrical brushes among all electrical brushes;
• meanwhile, the m other ends of the insulated conductor strips form m first terminals, the leading-out ends of m S-pole corresponding electrical brushes form m second terminals;
• or, the m ends of the insulated conductor strips are electrically connected with m S-pole corresponding electrical brushes among all electrical brushes;
• meanwhile, the m other ends of the insulated conductor strips form m first terminals, the leading-out ends of m N-pole corresponding electrical brushes form m second terminals;
• the m first terminals and the m second terminals form m pairs of external terminals correspondingly;
• m pairs of external terminals are connected with m pairs of power output terminals correspondingly one by one;
• m is a positive integer not smaller than 2, and w is 1, 2, or 4.