DC motor winding
First, the characteristics of DC motor windings:
1, the first pitch: y1, the distance between the two component sides of each component on the armature surface, expressed by the number of slots.
For example, the upper element side is in 1 slot and the lower element side is in 5 slots, then y1=5-1=4. In order to maximize the induced electromotive force of the winding, y1 should be close to the pole pitch. (The pole distance is the distance between two adjacent main poles, expressed in number of slots.)
2. Second pitch: y2. In the two components connected in series by the same commutator, the distance between the lower edge of the previous component and the upper edge of the latter component is represented by the number of slots. The y2 of the winding is negative and the y2 of the wave winding is positive.
3. Synthetic pitch: y, the distance between the corresponding sides of two elements in series. y=y1+y2.
4. Commutator pitch: yk, the distance between the two commutating segments connected to the two ends of the same component is represented by the number of commutator segments. y=yk.
Second, the basic type of winding:
1, single winding:
The two outgoing ends of the component are connected to two adjacent commutator segments; the adjacent components are connected in series, the leading end of the latter component is connected with the tail end of the previous component, and is connected to the same commutator segment, and finally The tail end of an element is joined to the head end of the first element to form a closed loop. The terminating portions of the two components in close series are tightly "folded" together. Give an example of the characteristics of the connection and the composition of the branch:
For example, the pole logarithm is p=2, the number of slots is Z=16, the number of components is S=K=16, y1=4, and yk=1, and a single-winding expansion diagram is drawn.
(1), pitch calculation
Single stack: y1=yk=1, full distance: y1=16/4=4, y2=y-y1=1-4=-3.
(two), winding connection table
(6) The number of parallel branches of the winding:
The number of parallel branches of a single winding is equal to the number of motor poles. The logarithm of the parallel branch is equal to the pole logarithm, ie: a = p.
Number of brushes = number of branches = number of poles
2, single wave winding:
The two commutating segments connected at both ends of each component are far apart, yk>y1, and the components are connected in series to form a wave shape. Y1 should be close to the pole distance, and yk satisfies the following formula:
After one round of detour, a reversal piece is advanced (+, right line) or back (-, left line) than the reversing piece at the start.
Example 2, drawing a left-row short-range single-wave winding development diagram, 2p=4, Z=S=K=15.
(6), the number of winding parallel branches:
The number of parallel branches of a single-wave winding is always equal to 2, independent of the number of main poles.
In addition to the single basic and single wave types of motor windings, there are other types, such as: overlapping, complex wave, hybrid winding, concentric winding and so on. The difference in the various windings is in the number of parallel branches.
