SU1628104A1 - Fast-response electromagnet - Google Patents

Abstract

The invention relates to electrical engineering, can be used in protection devices, such as circuit breakers. The goal is to increase the stability of the current setpoint and speed. The electromagnet contains rods 1 with poles 2. Yoke 3 carries coil 5 on the coax. Anchor 6 is located at poles 2. There is an additional pole 12 and a shunt 9. During a short circuit, the current in pole 2 changes with great speed just like the flow in 3. The flow in the shunt 9 is impeded by the damping action of the sleeve 10, as well as the action of the control coil 13, as a result, the flow in the bark 6 increases dramatically. When the power is aborted, shunt 9 acts as a core. 3 il. (L

Description

The invention relates to electrical apparatuses and can be used in protection apparatuses, for example, in circuit breakers of both traction and general industrial use / ignition.

(The purpose of the invention is to improve performance and speed.

FIG. 1 shows a high-speed electromagnet with the control coil turned on and the absence of current in the current coil; in fig. 2 shows a variant for fastening a short-circuited sleeve; in fig. 3 is another embodiment of an electromagnet.

The electromagnet (Fig. 1) consists of rods 1, which end with poles 2, roma 3, installed with gaps 4 between it and rods 1, current coil 5, located on rome 3, bar 6, for which the spring 7 is hooked, stop 8 to limit the stroke of the core 6, the shunt 9, which is attached to the short-circuited sleeve 10, the second stop 11 to limit the stroke of the shunt 9, the additional pole 12 with the control coil 13 and the additional spring 14 hooked to the shunt 9.

The sleeve 10 can be attached, for example, to the rod 1, with a gap 15 between this sleeve 10 and the shunt § (Fig. 2), and the gaunt can be made unshrunk.

Another variant of the design of an electromagnet is that the additional pole 12c is located on the outside of the electromagnet by the control coil 13, as a result of which the shunt 9 and the measuring pin 6 in the structure are close to each other. Therefore, instead of stops 8 and 1, shunt 9 can be used directly as a stop.

The high-speed electromagnet works in a skinny manner.

When the control coil 13 is turned on, a flow is created, indicated by a solid arrow, which closes mainly at additional pole 12, rod 1 and shunt 9. When current flows in current coil 5 a current is generated in frame 3 (shown by a dashed line), which is divided into two main flow, closing on the core 6 and the shunt 9. These flows are distributed with a slow and smooth change of current b current-coil 5

five

0

five

0

five

0

five

0

five

in accordance with the magnetic conductors of the sections of the magnetic circuit of the core 6 and the shunt 9. This operation of the electromagnet corresponds to the static mode, and the current in the current coil 5 corresponds to the current of the setpoint. For a protected circuit, this is an overload mode.

In dynamics (short circuit in the circuit), the current in the current coil 5 changes at high speed. The flow in the chassis 3 also changes at high speed. However, the rapid growth of the flow in the shunt 9 is prevented by the damping effect of the sleeve 13 having a small electrical resistance, and for part of the flow at the portion of the additional pole 12 - the damping action of the control coil 13, As a result, the flow in bark 6, measles 6 also increases sharply, overcoming the force of the spring 7, is set in motion. After the current flow in the current coil 5 is stopped, the result of opening the contacts of the protection apparatus is the measles 6 returns to its original position and comes into contact with the stop 8.

In the event of an emergency (or operational) interruption of the power supply of the control coil 13, it is set in motion by the force of the spring 14, the shunt 9, which in this case is the second corona. Its movement is limited by the stop I1. The activation of the coil 13 of the control can be carried out, for example, by forcing, then in the long-term operation of the electromagnet a neo-large current flows in the circuit of this coil.

The gaps 15 allow the shunt 9 to move unhindered when the short-circuited sleeve 10 is fixed to the rod 1. The sleeve 1C can be fixed in another way,

The forces arising from the movement of the core 6 and the shunt 9 can be used to disengage the latch in the protection apparatus or to control its contacts, and in a number of cases the layout of the variant in FIG. 3 may be preferred. The operation of the electromagnet in this case is similar to the operation of the electromagnet in the first embodiment (Fig. 1). Formula of invention

High-speed electromagnet, containing two rods of ferromagnetic material with poles, Rm, installed with gaps between it

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Claims (1)

Claim A high-speed electromagnet containing two rods of ferromagnetic material with poles, a yoke installed with gaps between them 1628104 6 and rods, a rotary anchor with a stop, mounted with the ability to fit to the poles, a spring engaged in an anchor, and a shunt with a coil, as well as a coil mounted on the yoke, characterized in that, in order to increase the stability of the set current and speed, the magnetic circuit is equipped with an additional pole mounted on the rod, an additional coil placed on the additional pole, the shunt is spring-loaded and equipped with an additional stop, the coil mounted on the shunt is made short-circuited, the shunt is made in the form of an anchor adjacent to the additional pole with the ability to move to the additional stop, and the coil mounted on the yoke is made current.