This 搭铁 switch main function includes: (1) When has the starting hardover failure, automatic turnoff total power source; (2) When the flameout stops using, after has not switched off uses electricity the electric appliance or has not separated power source 搭铁 switch period of time, automatic turnoff total power source; (3) After needs to start the vehicles or the breakdown elimination, automatic reset circular telegram, but smoothly starts the vehicles, has protected the accumulator cell and the generator, has realized the mechanical device (for example automobile, tractor, generator, tank as well as oil field serving as industry machine, passes and machine and so on) the power circuit automatic control.

The practice proved that, the automobile multi-purpose electron 搭铁 controlling switch has the automaticity high, safe reliable, may operational strong, the cost inexpensive, the serviceability be strong and so on the characteristic, has the broad promoted prospect. This 搭铁 switch has attained the national practical new patent (patent number ZL2003 20106600.3).

1. The tradition builds made of iron controls the insufficiency which the switch exists

1) starts when frequently has the starting hardover failure, namely the generator 小齿�?cannot separate with the engine flywheel ring gear start. Investigates its reason mainly is: (1) The initial firing current is big, causes on the generator the magnetic contactor electronic contact ablation, the nap, when in addition maintains, the generator returns to the position organization to send the card as a result of the dirty dirt, causes the starting mechanical and electrical magnetic switch electronic contact adhesion; (2) Machine oil temperature low, viscosity big (in particular in winter), causes when the starting the engine is heavy, causes the generator and the engine flywheel ring gear cannot separate start. After has the starting hardover failure, if cannot promptly perform to debug, can create the generator or the accumulator cell damage, discards, is serious even creates the accident.

2) mechanical type 搭铁 controlling switch although simple is practical, when the flameout stops using, some possibilities forgot separates the power source 搭铁 switch, causes the battery discharge, to owe the electricity, causes the accumulator cell damage. Moreover, when restarts the work, as a result of the accumulator cell electric quantity insufficiency or the damage, causes the mechanical device to be unable the normal work.

3) safe, the reliable disposition correlation is low, cannot realize the automatic control, needs the manual control.

2. Multi-purpose electron 搭铁 controlling switch structure and performance

The multi-purpose electron 搭铁 controlling switch mainly by four major part is composed: A) starts the out of control control circuit; B) electromagnetic type relay; C) IC integrates the automatic power failure electric circuit; D) three ends voltage-stabilizer circuit, its electric circuit see Figure 1, each part of logical organization see Figure 2.

By chart 1 obviously, the starting out of control control circuit a connection in the generator and between electromagnetic type relay b, IC integrates the automatic power failure electric circuit c connection on three ends voltage-stabilizer circuit d and the accumulator cell, electromagnetic type relay b connection between accumulator cell and generator, three ends voltage-stabilizer circuit d connection on accumulator cell.

Multi-purpose electron 搭铁 controlling switch main performance:

When 1) has the starting hardover failure, the electron 搭铁 controlling switch automatic power failure, causes the generator no longer to revolve, thus protects the generator and the accumulator cell is not damaged. After the breakdown eliminates 5s, the controlling switch automatic reset, may continue to carry on the next normal starting.

2) after the automobile stops revolving 10min, the electron 搭铁 controlling switch automatic power failure, shuts off the automobile 搭铁 return route, prevented the accumulator cell leaks Shanghai, when restarts the vehicles, only must press the reset button, the electric circuit then may automatically put through.

3) load current: 0 ~ 800A/min.

4) sensitivity: <= 1 mu s.

5) time delay error: <= 2%.

3. Multi-purpose electron 搭铁 controlling switch merit

After the multi-purpose electron 搭铁 controlling switch develops successfully, puts into the use on the our company 64 trucks. The practical application proof, this switch has overcome the existing mechanical type 搭铁 switch and in the electromagnetic 搭铁 switch technology insufficiency, has following remarkable merit:

1) the function are many, both can control the starting to expire, when can the automatic reset circular telegram, also the engine off can the automatic turnoff power source;

2) automaticity high, does not need artificially to debug the control, but operational is strong;

3) the system installment does not have the leakage, safe is reliable;

4) structure simple, the installment service is convenient;

5) may work under the many kinds of operating modes, the serviceability is strong, has the very good promoted value.

4. Technology economic efficiency

1) successfully has solved the starting hardover failure which the mechanical device exists, avoided the person, the equipment accident occurrence, the security has been strong;

2) reduced the automobile accumulator cell, the generator damage with discards, saved the material, and reduced the replacement, a service man-hour of loss;

3) reduced operating personnel's labor intensity;

4) produces the safeguard to be prompt.