CN86104376A

CN86104376A - Fully automated controller

Info

Publication number: CN86104376A
Application number: CN198686104376A
Authority: CN
Inventors: 周鹏
Original assignee: HENGYANG SEMICONDUCTOR WORKS
Current assignee: HENGYANG SEMICONDUCTOR WORKS
Priority date: 1986-06-19
Filing date: 1986-06-19
Publication date: 1987-12-30

Abstract

Fully automated controller belongs to car electrics.The present invention is by three-phase half control rectifier bridge, three-phase commutation bridge, overvoltage protection loop, overcurrent protection loop, charge control loop, homophase trigger, short-circuit protection and reverse connecting protection loop formed automatically.When taking place, overcurrent, overvoltage, short circuit, reversal connection can trigger the loop by homophase and realize protection automatically by the sampling of corresponding sample of signal loop.The present invention can be used as various medium and small, large-scale, super-huge delivery formula dynamo governors; Full-automatic micro-charger as various medium and small portable three alternating current generators; The automatic charger that also can be used as various power-supply devices.

Description

Fully automated controller

The invention belongs to car electrics

In prior art, automobile has two kinds of mechanical electromagnetic type and transistor integrated circuit formulas with adjuster, all is to regulate output voltage by changing generator excitation intensity.Rectification is carried out with the adjusting separated into two parts, the alternating current of generator output through three rectifier bridge rectifications after accumulators voltage, when battery tension reaches rated value, generator excitation circuit promptly disconnects or changes exciting current intensity charging is stopped, or charging current is reduced, when reducing, connects automatically again cell voltage.The poor reliability of machinery electromagnetic regulator, it is low to regulate sensitivity, electrical equipment is disturbed big, superseded gradually.The more mechanical electromagnetic type advanced person of transistor integrated circuit adjuster, but its rectification is control indirectly with regulating, and also control precision is relatively poor, can not protect automatically when overcurrent, overvoltage, short circuit, reversal connection take place.

The present invention adopts homophase trigger theory (seeing patent application case No. 85107695), has finished a kind of circuit design of novel adjuster, can make rectification, regulate integratedly, can protect automatically when overcurrent, overvoltage, short circuit, reversal connection take place.By the adjuster that this design is made, its volume only is 1/5th of a like product, and weight is 1/10th, makes cost decreases.

Implementation method of the present invention and operation principle are as described below:

As shown in the figure, three-phase alternating voltage is transported to the three-phase half control rectifier bridge of being made up of SCR1, SCR2, SCR3, D1, D2, D3, and this rectifier bridge has the dual-use function of rectification charging and controlled phase shift shutoff concurrently.D1, D2, D3, D4, D5, D6 form three-phase commutation bridge in parallel, and it provides working power for control triggers the loop, again as trigger signal source.R1, DW1, C1, D7 form overvoltage protection sampled signal loop and take a sample from three-phase alternating voltage.When generator because hypervelocity or other are former thereby when causing the output voltage overrate, overvoltage crowbar is just exported an overvoltage protection signal.

B, D10, D11, D12, D13, R5, DW3, C2, D8 form the overcurrent protection loop, are taken a sample by instrument transformer B.When because load is overweight or when causing generator commutation device output current to surpass specified index because of partial short circuit, instrument transformer B promptly exports a certain amplitude voltage as the overcurrent protection signal.

R3, DW2, R4, D9 form the control loop that charges automatically and are also directly taken a sample by cell voltage.Its control magnitude of voltage is determined by DW2.When cell voltage was lower than rated value, this signal promptly disappeared.

R6, R7, BG1, BG2, R8 form control and trigger the loop.BG1 is a direct current amplifier, and when sampling loop did not have signal output, BG1 ended, and VC1 is a high potential.BG2 is an emitter follower.Its output directly is linked to the gate pole of SCR1, SCR2, SCR3, and its three-phase half control rectifier bridge has made electric current output, charge a battery, and when battery tension reaches rated value, BG1 conducting, VC1 trend zero.BG2 ends owing to obtaining base flow, and three SCR also close at the natural zero-crossing point by obtaining gate current because of BG2.

If overcurrent protection sampling loop and overvoltage protection sampling loop have signal output and disappear, just BG1, BG2 repeat said process.

Form short-circuit protection and reverse connecting protection loop by R9, DW4, C3, BG3, J.If during the careless reversal connection of the both positive and negative polarity of battery and rectifier, just BG3 ends, relay J disconnects, and the SCR of major loop turn-offs because of can not get triggering signal; When outer load when breaking down short circuit, relay J can not get operating voltage; The BG2 base stage is disconnected, and major loop SCR can't obtain triggering signal and turn-off.

When battery tension trended towards the rated voltage critical value, the angle of flow of SCR just moved backward, and output current is reduced, and when rated voltage, and a little electric current of keeping is arranged, and made cell voltage keep stable state.

Performance of the present invention and purposes.

1, this adjuster have overvoltage from logical current limliting, overcurrent protect automatically, short circuit is protected automatically, reversal connection is protected automatically and fault is got rid of, and recovers functions such as negative temperature automatically.

2, regulation voltage scope: (27-29) ± 0.2 volt,

(13.5-14.5) ± 0.1 volt.

3, rectification and charge power are as the criterion with rectifying tube output current and charging load.This adjuster can be designed to various and the incorporate built-in type product of generator, can be used as various medium and small, large-scale, super-huge delivery formula dynamo governors; The full-automatic micro-charger that can be used as various medium and small portable threephase alternators; The automatic charger that also can be used as various power-supply devices.

Claims

1, a kind of employing thyristor homophase triggering method, and comprise and it is characterized in that the fully automated controller of a homophase trigger equipment:

A, form by resistance R 1, voltage-stabiliser tube DW1, capacitor C 1 and diode D7 from the overvoltage protection sample of signal loop of three-phase alternating voltage sampling;

B, be by instrument transformer B from the overcurrent protection loop of instrument transformer B sampling, rectifying tube D10～D13, resistance R 5, voltage-stabiliser tube DW3, capacitor C 2, diode D8 form;

C, form by resistance R 3, voltage-stabiliser tube DW2, resistance R 4, diode D9 from the automatic charging control loop of cell voltage direct sample.

2, a kind of fully automated controller as claimed in claim 1 is characterized in that: described overvoltage protection sampling loop, overcurrent protection loop and the control loop that charges automatically all trigger the loop with homophase and directly are connected.

3, a kind of as claim 1,2 described fully automated controllers, it is characterized in that: short-circuit protection and reverse connecting protection loop are made up of resistance R 9, voltage-stabiliser tube DW4, capacitor C 3, transistor BG3 and relay J.