Unlock instant, AI-driven research and patent intelligence for your innovation.

Permanent-magnet double steady-state contactor

A bistable, permanent magnet technology, used in AC/DC contactors, high and low voltage circuit breakers, circuit switch control devices, and relays. problems, to achieve the effect of ensuring reliability and anti-interference ability, improving magnetic energy utilization, and improving stability

Inactive Publication Date: 2007-04-25
ZHONGJIN ELECTRICAL APPLIANCES & EQUIP YANGZHONG CITY
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One is that the operating mechanism usually contains two permanent magnets that have an opposing effect on each other. Not only is the structure complex, but the structural design of the armature and the connection relationship with the permanent magnet are not scientific enough, the magnetic gathering effect is poor, and the stability and reliability during use are not enough. Ideal; the permanent magnet is directly affected by the impact force when it is attracted, and it is easy to break; the magnetic flux leakage is serious, and it is easy to pick up external ferromagnetic materials
[0006] More importantly, a typical pulse excitation circuit is mainly composed of a rectifier circuit, a trigger circuit composed of a piezoresistor, a charge-discharge circuit composed of an electromagnetic coil and a capacitor in series, and a mutual clamped SCR forward and reverse pulse excitation circuit. Composition, because there is no voltage fluctuation range control link of positive and negative pulse excitation circuits, so the power supply voltage fluctuates slightly, the operating mechanism will move, frequent opening and closing, it is not suitable for national conditions, and cannot be widely used; in addition, the circuit There is a lack of protection in the circuit, so the reliability and anti-interference ability are poor. When the switching frequency of the actuator is slightly faster or the characteristic parameters of the electronic components are slightly changed, it is easy to cause the two thyristors to be turned on at the same time at the same time, resulting in short circuit and burning. the whole line

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Permanent-magnet double steady-state contactor
  • Permanent-magnet double steady-state contactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The operating mechanism of the permanent magnet bistable contactor in this embodiment is shown in Fig. 1, which mainly consists of an upper yoke 7, a side yoke 3, a lower yoke 1, a coil 2, an inner yoke 5, a permanent magnet 4, a T Type armature 6, and operating rod 8 form. The upper yoke 7, the side yoke 3 and the lower yoke 1 are fixedly connected to each other to form an outer yoke that can form a magnetic circuit. The coil 2 is installed in the outer yoke, on which the inner yoke 5 is fixed, and the permanent magnet 4 is fixed between the inner yoke 5 and the side yoke 3 . The upper end surface of the inner yoke 5 used to connect with the T-shaped armature 6 is made into a groove inner concave surface 9 with a small diameter downward, and the cone angle 2α of the groove is 100°-110°. The T-shaped armature 6 is inserted into the central hole of the inner yoke 5 and the electromagnetic coil 2 (L), and the operating rod 8 is fixedly connected with the top of the T-sha...

Embodiment 2

[0030]The pulse excitation circuit of the permanent magnet bistable contactor in this embodiment is similar to that in Embodiment 1. Its operating mechanism is shown in Figure 3, is made up of upper yoke 7, side yoke 3, lower yoke 1, skeleton coil 2, T-shaped armature 6, permanent magnet and opening spring 11. The upper yoke 7, the side yoke 3 and the lower yoke 1 are fixedly connected to each other to form an outer yoke forming a magnetic circuit. The skeleton coil 2 is installed in the outer yoke, the T-shaped armature 6 is inserted in the skeleton coil 2, and the opening spring 11 It is a tower spring, which is sleeved on the root of the neck of the T-shaped armature 6, and its two ends are connected with the lower side of the upper part of the T-shaped armature 6 and the upper end surface of the skeleton coil 2 respectively. The permanent magnet 4 matches the core bottom of the T-shaped armature 6 and is fixed on the lower yoke 1 to form a boss shape extending into the coi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to improvement of a permanent-magnet double steady-state contactor magneto bistable contactor, which belongs to the switch controller field. The contactor is mainly composed by an outer magnetic yoke, a coil, an armature, a permanent magnet as well as a pulse excitation circuit, wherein, the pulse field circuit comprises a rectifying circuit, a trigger circuit, a charging and discharging circuit, and a pros and cons to pulse excitation loop. The improvement lies in that: said pulse excitation circuit also comprises a sampling circuit and an amplifying circuit; the output of said rectifying circuit connects with the sampling circuit; the output of said sampling circuit connects with the base electrode of the amplifying circuit triode; said amplifying circuit bridges between the negative pole and the trigger pole of the reverse excitation silicon-controlled; the output of said reverse excitation silicon-controlled forms a reverse excitation loop along with the capacity of the charging and discharging circuit and the coil. Compared with the existing similar products, the invention may implement the steady control of switching-off and switching-in in the permissive voltage fluctuation scope; has apparently raised the reliability, stability as well as magnetic energy utilization rate; and it is more suitable for national conditions and can be popularized.

Description

[0001] technical field [0002] The invention relates to a permanent magnet contactor, in particular to an improved control device for a permanent magnet contactor, and belongs to the technical field of circuit switch control devices such as AC and DC contactors, relays, and high and low voltage circuit breakers. Background technique [0003] Permanent magnet bistable contactors have attracted widespread attention in recent years due to their remarkable advantages such as fewer fault sources, less noise, and lower energy consumption in operation. Its typical structure is: a permanent magnet and an electromagnetic coil are installed in a frame formed by a magnetic yoke, and an armature that can move between two stable positions is placed in the coil, and the charge and discharge of the thyristor control capacitor is controlled by a pulse excitation circuit, so that in When positive and negative electric pulses are generated on the electromagnetic coil, and then respectively gen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01H51/01H01H47/02
Inventor 王玉理张春荣杜利国
Owner ZHONGJIN ELECTRICAL APPLIANCES & EQUIP YANGZHONG CITY