What is a jump relay? What is its main function?
By the appropriate fit of the winding and the wave winding mixed with a DC armature winding. The windings and windings of the windings are connected in parallel to the same commutator. Because of its coil shape is like a frog named after the name. This winding due to wave winding coil and winding coil between each other plays a uniform line, so no need to add another pressure line.
May 9, 2017
The main function
There are single-wave windings and rewind windings. Single-wave winding is characterized by all the coils under the same polarity according to certain laws in series all together to form a parallel branch. So the entire armature winding only two parallel branch. G is the number of commutator segments; a is a positive integer that makes Ys equal to an integer, which is equal to the number of parallel branches of the wave winding. Single wave winding a = 1, and a = 2 of the complex winding called double-wave winding, it can be seen as two single-wave winding in parallel from the complex winding, so there are four parallel branch; a> 2 can be analogy, but very little use. Wave winding from the parallel circuit connection principle that only two sets of brushes, that is, a group of positive brushes and a group of negative brushes.
However, the number of brush groups in the DC winding is usually equal to its number of poles, which is to reduce the current load on the contact surface of the brush and the commutator, thus reducing the length of the commutator. In addition, the commutation of the coil current is also beneficial. DC armature winding often due to some reason caused by the parallel branch of the current distribution of uneven, so that increased copper consumption, armature winding overheating; sometimes make the brush under the occurrence of harmful sparks, to the adverse effects of motor operation. Will be the armature winding internal theoretical equipotential point directly connected with the wire, you can improve the motor operating conditions. The connection wires specifically provided for this purpose are called equalizing lines.
May 9, 2017
The jump relay is the trip position relay. It is also a general relay, because it is to reflect the circuit breaker in the trip position, so called the jump relay. Similarly, there are joint relay. When the trip, the jump relay relay coil live, normally open node closed, send a trip signal, or make the trip indicator light.
May 9, 2017