CN2047060U

CN2047060U - High-operating-frequency energy saving dc electromagnet

Info

Publication number: CN2047060U
Application number: CN 87216554
Authority: CN
Inventors: 肖新凯
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-12-15
Filing date: 1987-12-15
Publication date: 1989-11-01

Abstract

The utility model relates to a direct current electric magnet which is suitable for the operation of a direct current power electric source. The utility model aims to improve the use performance of an electromagnetic operating mechanism, prolong the mechanical life, achieve the material saving and power saving and reduce the cost of the electromagnetic mechanism. Both ends of a main coil of the electric magnet are reversely connected with diodes in parallel. The operation of the utility model is realized by the measures of the follow current effect of the diodes in the electromagnetic system, etc.

Description

High-operating-frequency energy saving DC electromagnet

The utility model relates to DC electromagnet, is particularly useful for product or the product component such as contactor, brake, tractive electromagnet and direct current electromagnetic shaker that adopt the DC dynamo power operation.

Existing DC electromagnet electrical appliance part is mainly by the diverter switch link, and parts such as current limliting link and electromagnet main coil connect in some way by lead and constitute.Before the adhesive campaign was finished in the electromagnet energising, the action of diverter switch link was devoted oneself to work the current limliting link.Such electromagnet is widely used for adopting the contactor of DC power supply operation.But in actual use DC electromagnet to keep the adhesive ampere-turn generally higher, show as and have very low release voltage (as having only the operating voltage of 10%-40%), prior art still can not change keeps the higher present situation of adhesive ampere-turn, because the adhesive ampere-turn is kept in a reduction, electromagnet reliably adhesive puts in place, so the electromagnet power consumption is bigger, coil temperature rise is higher (when continuing energising, coil temperature rise exceedes 60-90K), and also therefore limited serviceabilities such as the frequency of operation of electromagnet and electrical continuous rate.

The purpose of this utility model is: by increasing device, with a kind of simple connecting mode, change the part-structure of DC electromagnet, make it can reliably working, electrical energy saving, can improve the serviceability (comprising frequency of operation, the electrical continuous rate and the scope of application etc.) of electromagnet again, also have benefits such as material-saving economize on electricity and reduction cost in addition.

The major measure that the utility model is taked is: diode on the reverse parallel connection of DC electromagnet main coil two ends.Make the electromagnet that is constituted comprise electromagnet core, the diverter switch link, the current limliting link, devices such as electromagnet main coil and diode are formed.Owing to added the diode of reverse parallel connection at DC electromagnet main coil two ends, after the action of diverter switch link, armature is except a small amount of kinetic energy by itself, also obtain the afterflow suction that freewheel current produced of flowing through coil and diode, make electromagnet finish the adhesive campaign, like this, keeping under the state of adhesive, keeping ampere-turn just can reduce, the parameter of current limliting link can be adjusted by higher release voltage, the electric current that flows into the electromagnet main coil can be by required release voltage value, as: operating voltage (0.40-0.80) is adjusted.The utility model is improving the frequency of operation and the electrical continuous rate of electromagnet, alleviates the weight of electromagnet, and reducing aspects such as cost and power consumption all has obvious improvement than prior art.

Further the utility model is described below by drawings and Examples.

Fig. 1 is the elementary diagram of prior art.

Fig. 2 is a structure principle chart of the present utility model.

Fig. 3 is a kind of circuit diagram of Fig. 2.

As an embodiment of the present utility model, its circuit diagram 3 is on the basis of Fig. 1, replaces auxiliary current-limiting inductor Wg with resistance R, connects with DC electromagnet main coil Wg after resistance R and the diverter switch K parallel connection again, diode D on the reverse parallel connection of main coil two ends forms the DC electromagnet control circuit.For example: CJ12-400Z is a kind of A.C. contactor that adopts the operation of direct current twin coil.When operating voltage is Ue=220v, the resistance R q=100 Europe of main line astragal Wg, line directly is 0.51mm, the number of turn is 5500 circles; The resistance of ancillary coil Wg is 875 Europe, and line directly is 0.27mm, and the number of turn is 10800 circles, adopt Fig. 3 circuit after, by the afterflow effect of diode D, under the cooperation of switching open pipe K, reduce and keep the reliable adhesive that does not influence contactor behind the adhesive ampere-turn.Former release voltage Ur has only (0.05-0.15) Ue, and the resistance of current-limiting resistance R can be adjusted for the required ampere-turn of keeping of (0.50-0.80) Ue according to release voltage Ur now.If Ur is raised to 0.60Ue from original 0.15Ue, keep ampere-turn and can reduce to 920 ampere-turns, current-limiting resistance R can be 1200 Europe.After having taked these measures, coil can be economized copper 40%(and be about 1.46Kg), but 26%(12.9 watt of power saving when keeping adhesive), coil temperature rise can reduce 40K approximately, and that the frequency of operation of contactor can be brought up to (1200-1800) is inferior/hour.And if then for contactor designs new electromagnetic mechanism, also can reduce the complete machine cost, alleviate complete machine weight, and can prolong contactor mechanical endurance.

Certainly, as structure principle chart of the present utility model (Fig. 2), its current limliting link can be a resistance, can be the ancillary coil that contains resistance or do not contain resistance, and this link also can be low-tension supply (promptly keeping ampere-turn by second source to coil input) or come the step-down current limliting by inverter.

Claims

1, a kind of DC electromagnet that is applicable to contactor, brake, tractive electromagnet and direct current electromagnetic shaker, comprise electromagnet core, the diverter switch link, current limliting link and electromagnet main coil, and with an end of diverter switch link, one end of current limliting link, a termination of electromagnet main coil becomes an asterism, it is characterized in that diode on the reverse parallel connection of electromagnet main coil two ends.

2, DC electromagnet according to claim 1 is characterized in that the current limliting link can be a current-limiting resistance, also can be the ancillary coil that contains resistance or do not contain resistance, can also be low-tension supply, or come the step-down current limliting by inverter.