Separately excited direct current motor drive apparatus and equipment

A separately excited direct current motor drive apparatus, characterized by comprising:

• a separately excited direct current motor with a rated voltage;
• a direct current power supply with a constant voltage corresponding to the rated voltage;
• an armature chopper for converting the constant voltage into an armature variable voltage based on an armature control signal and providing the armature variable voltage to the separately excited direct current motor;
• and
• a field chopper for converting the constant voltage into a field variable voltage based on a field control signal and providing the field variable voltage to the separately excited direct current motor,
• wherein the armature chopper has m armature chopper units,
• each armature chopper unit has a first armature power output end, a second armature power output end and w armature switch control ends,
• the armature control signal comprises m armature unit control signals respectively corresponding to the m armature chopper units and formed according to a predetermined phase staggering rule,
• each armature unit control signal comprises w armature switch control signals corresponding to the w armature switch control ends in the corresponding armature chopper unit,
• the w armature switch control ends are used to correspondingly receive the w armature switch control signals,
• the m first armature power output ends of all the armature chopper units and the m second armature power output ends of all the armature chopper units correspondingly form m pairs of armature power output terminals,
• the field chopper has n field chopper units,
• each field chopper unit comprises a first field bridge arm and a second field bridge arm, as well as a first field power output end and a second field power output end,
• the first field bridge arm comprises a first field upper bridge arm and a first field lower bridge connected in series with each other, the second field bridge arm comprises a second field upper bridge arm and a second field lower bridge arm connected in series with each other, the first field bridge arm and the second field bridge arm are connected in parallel to each other,
• the first field upper bridge arm and the second field upper bridge arm are both connected to a positive pole of the field direct current power supply, the first field lower bridge arm and the second field lower bridge arm are both connected to a negative pole of the field direct current power supply,
• the first field upper bridge arm, the first field lower bridge arm, the second field upper bridge arm and the second field lower bridge arm respectively comprise at least one field power switch tube, at least one diode connected in anti-parallel to the field power switch tube, and a field switch control end,
• each field power switch tube has one field control pole,
• the field switch control end is formed based on the field control pole,
• the field control signal comprises n field unit control signals respectively corresponding to the n field chopper units and formed according to a field predetermined phase staggering rule,
• each field unit control signal comprises four field switch control signals corresponding to the four field switch control ends in the corresponding field chopper unit,
• the field switch control end in the first field upper bridge arm is used as a first field upper bridge arm switch control end, the field switch control end in the first field lower bridge arm is used as a first field lower bridge arm switch control end, the field switch control end in the second field upper bridge arm is used as a second field upper bridge arm switch control end, and the field switch control end in the second field lower bridge arm is used as a second field lower bridge arm switch control end, for correspondingly receiving the four field switch control signals,
• the first field power output end is arranged between the first field upper bridge arm and the first field lower bridge arm, the second field power output end is arranged between the second field upper bridge arm and the second field lower bridge arm,
• the n first field power output ends of all the field chopper units and the n second field power output ends of all the field chopper units correspondingly form n pairs of field power output terminals,
• the separately excited direct current motor comprises:
• m pairs of brushes;
• a stator, comprising m pairs of main magnetic poles corresponding to the m pairs of brushes and one field winding portion;
• and
• a rotor, arranged in the stator and comprising a plurality of armature windings connected with one another in a predetermined connection manner,
• each pair of main magnetic poles comprises an S-polarity main magnetic pole and an N-polarity main magnetic pole,
• each pair of brushes comprises an S-pole corresponding brush corresponding to the S-polarity main magnetic pole and an N-pole corresponding brush corresponding to the N-polarity main magnetic pole,
• the field winding portion comprises n field winding units,
• each field winding unit is formed by field coils made from an insulated conductor bar composed of metal wires wrapped with an insulating layer on at least one pair of main magnetic poles,
• the insulated conductor bar in each field winding unit has one end and the other end,
• two leading-out ends of each pair of brushes respectively form a first armature terminal and a second armature terminal,
• the m first armature terminals and the m second armature terminals of all the brushes correspondingly form m pairs of armature external terminals,
• the m pairs of armature external terminals are connected to the m pairs of armature power output terminals in a one-to-one correspondence manner,
• the n one ends of all the insulated conductor bars form n first field terminals, the n other ends of all the insulated conductor bars form n second field terminals,
• the n first field terminals and the n second field terminals correspondingly form n pairs of field external terminals,
• the n pairs of field external terminals are connected to the n pairs of field power output terminals in a one-to-one correspondence manner,
• m is a positive integer not less than 2, n is a positive integer not less than 2, and w is 1, 2 or 4.