CN205430194U

CN205430194U - Isolator device

Info

Publication number: CN205430194U
Application number: CN201520632494.5U
Authority: CN
Inventors: 黄小刚; 陈爱华
Original assignee: Hangzhou Yiju Electronic Technology Co ltd
Current assignee: Holley Technology Co Ltd
Priority date: 2015-08-20
Filing date: 2015-08-20
Publication date: 2016-08-03
Anticipated expiration: 2025-08-20

Abstract

The utility model discloses an isolator device, through use high -frequency transformer's mode, the voltage variation who uses the wherein change of the switch input volume in secondary side place return circuit to encourage primary winding to incline measures, and voltage variation volume signal is carried for controller in the circuit to make the controller to the corresponding control signal of other functional circuit output. Include: form the the first loop and the second return circuit of electric isolation each other to and high -frequency transformer, will high -frequency transformer's primary winding and secondary branch are located in first, the second return circuit and form mutual electromagnetic coupling be equipped with the signal source in the the first loop and come this primary winding of drive be equipped with the input switch of connecting each load in the second return circuit, be used for the basis the incoming signal excitation of input switch the different control voltage of output in the the first loop. And simultaneously, the embodiment of the utility model provides a design an isolated form switching element that has multistage high -frequency transformer.

Description

A kind of disconnecting switch device

Technical field

This utility model is primarily with regard to needs low speed switch amount, such as the circuits improvement application of the isolation input of key switch.

Background technology

It is generally required to electrical isolation design On-off signal circuit design in, it is common that use optocoupler, hall sensing device or photoelectric sensor or wireless short-distance switch solution to solve.

In actually used circuit work process, if using light-coupled isolation switch, then need to provide independent excitation power supply respectively in input, output loop both sides according to its photoelectric characteristic, expend design cost.If using such as hall sensing to switch as isolated form switching device, mainly realizing signal by magnetic induction way adhesive switch and transmitting, but the strong magnetic disturbance being but easily subject in equipment, such as ammeter.Or, realizing disconnecting switch by other photoelectric sensors then needs bigger electric plates design space and complicated electrical structure, increases cost equally.Or, use wireless switching mode then cannot realize multiple switch when using, it is to avoid the mutual signal disturbing of each switch room simultaneously.

Utility model content

This utility model embodiment is the novel replacement scheme of one solving above-mentioned technological deficiency, a kind of disconnecting switch device of design, by the way of using high frequency transformer, purpose is that the change using the wherein switch input quantity in loop, place, secondary windings side is to encourage the voltage variety of armature winding side, thus flow to a controller in circuit by these voltage variety signals, so that controller exports corresponding control signal to other functional circuits.

At an aspect of the present utility model, above-mentioned disconnecting switch device includes: the first loop, connects and sets external power source；And second servo loop, connect and set some loads, electrical isolation is formed between described first loop and second servo loop, farther include: high frequency transformer, in the armature winding of described high frequency transformer and secondary windings are divided into described first, second loop and form mutual electromagnetic coupling, signal source it is provided with to drive this armature winding in described first loop, being provided with the input switch connecting each load in described second servo loop, in the input signal according to described input switch encourages described first loop, output difference controls voltage.

In one embodiment, described some loads include that the multistage load of blocked impedance in described second servo loop the most in parallel, the load of each of which level connect an input switch.

As improvement, the resistance of described multistage load is successively decreased successively.

Based on aforementioned schemes, can design again multiple-pole switch device, the disconnecting switch such as realizing more stages by the way of arranging high frequency transformer that is multiple and that connect controls.

Therefore in another aspect of the present utility model, disconnecting switch device includes: the first loop, connects and sets external power source；And second servo loop, connect and set some loads, electrical isolation is formed between described first loop and second servo loop, farther include: multiple high frequency transformers, in the armature winding of each high frequency transformer and secondary windings are divided into described first, second loop and form mutual electromagnetic coupling, signal source it is provided with to drive this armature winding in described first loop, being provided with the input switch connecting each load in described second servo loop, in encourage described first loop according to switch input signal, output difference controls voltage.

In described first, second loop, it is arranged with connection armature winding and the blocked impedance of secondary windings, receives blocked impedance two ends output voltage in this first loop by low pass filter, and be converted to a discernible logical signal of controller by adc circuit.

Described some loads include at least one-level load of blocked impedance in described second servo loop the most in parallel, and the load of each of which level connects an input switch, and in encouraging described first loop according to the input signal of different input switches, output difference controls voltage.

Beneficial effect: the input of one or more disconnecting switch semaphore can be realized in the way of the simplest and low cost；It is simultaneously based on this utility model principle and multiple input can be set, it is achieved circuit is expansible.

Accompanying drawing explanation

Fig. 1 is the essential electrical functional diagram of this utility model disconnecting switch device embodiments.

Detailed description of the invention

Embodiment 1: with reference to Fig. 1, this utility model disconnecting switch device embodiments includes the first loop 1 and second servo loop 2, wherein the first loop 1 can connect and set external power source, and the running voltage of each functional circuit is obtained by the power supply of electric power source, second servo loop 2 connects and has set some loads, the such as exemplary loads R0, R1 shown in Fig. 1 ... Rn.In general manner, electrical isolation is formed between the first loop 1 and second servo loop 2.High frequency transformer T it is provided with again in the improvement of the present embodiment, in the armature winding T1 and secondary windings T2 of described high frequency transformer T are divided into described first, second loop and formed mutual electromagnetic sensing, signal source 10 it is provided with to drive this armature winding T1 in described first loop 1, the input switch connecting each load it is provided with in described second servo loop 2, such as in Fig. 1, load R1 loop is provided with load K1, arranges load Kn to load Rn loop.Switch K1 ... Kn output difference in the input signal according to described input switch encourages described first loop 1 controls voltage.

Further, in described first, second loop, it is arranged with the sampling resistor R connected in armature winding T1 and the blocked impedance of secondary windings T2, such as the loop 1 and fixed resistance R0 in loop 2.In one embodiment, the output voltage at blocked impedance R two ends in the first loop 1 can be received by low pass filter 11, and be converted to a discernible logical signal of controller by adc circuit 12.

In another embodiment, secondary windings T2 side in described second servo loop 2 again and is connected to conducting switch, preferably diode D, when being low level according to the PWM waveform driving the signal source 10 of described armature winding T1 to produce, conducting is with the described secondary windings T2 magnetic core that resets.Described some loads specifically include again the multistage load Rn of blocked impedance R0 in described second servo loop 2 the most in parallel, each of which level load Rx connects an input switch Kx (any one numeral in x refers to an integer range herein, the most here x={1,2 ... n}).

For Fig. 1 embodiment, at second servo loop 2 built with two switch keys K1, K2, i.e. it is parallel with two-way load R1 and R2.Therefore, the PWM waveform produced in signal source 10 in second servo loop 2 will produce three kinds of different voltages when being high level Ua, such as: 1) when not closing switch key K1 and K2, R0 is only loaded on the primary side T1 loop of high frequency transformer T, the electric current then flow through on the first loop 1 fixed resistance R is I0, and in the first loop 1, b point average voltage is Ub0；2) when ON switch K1, resistance R1 is switched on, and the electric current on resistance R is I1, then b point average voltage is Ub1,.And when ON switch K2, resistance R2 is switched on, the electric current that fixed resistance R flows through is I2, then b point average voltage is Ub2；3) when simultaneously turn on switch K1, during K2, resistance R1, R2 simultaneously turn on, then resistance R upstream overcurrent be I3, b point average voltage be Ub3.

As improvement, resistance Rn of described multistage load is successively decreased successively.In Fig. 1 embodiment, due to resistive impedance R1 < R2 < R1 | | R2, then i1 < i2 < i3.And meet Ua Ix R=Ub, Ub1 > Ub2 > Ub3 > Ub0 can be learnt.After so by low pass filter 11 and the adc circuit 12 sampling to voltage Ubx, controller is allowed to may recognize that various combination or the key commands of switch key Kn on second servo loop 2.

Embodiment 2: as the improvement on the basis of above-described embodiment, can realize a kind of disconnecting switch device, including the first loop 1 and second servo loop 2, form effective electrical isolation between described first loop 1 and second servo loop 2.Switching device farther includes multiple high frequency transformer T, in the armature winding T1 and secondary windings T2 of each high frequency transformer are divided into described first, second loop and formed mutual electromagnetic sensing, signal source 10 it is provided with to drive this armature winding T1 in described first loop 1, the input switch Kx connecting each load Rx it is provided with, for controlling voltage according to output difference in described first loop 1 of switch input signal excitation in described second servo loop 2.

As improve, connection armature winding T1 and the blocked impedance of secondary windings T2 it is arranged with in described first, second loop, receive blocked impedance R two ends output voltage Ubx in this first loop 1 by low pass filter 11, and be converted to a discernible logical signal of controller by adc circuit 12.

As improving further, described some load Rx include at least one-level load Rx (n the load in such as embodiment 1 being parallel to blocked impedance R0 in described second servo loop 2 successively, the most each secondary windings T2 side can multiple load switches in parallel), each of which level load Rx connects an input switch Kx, controls voltage Ubx according to output difference in described first loop 1 of the input signal excitation of different input switches.

Claims

1. a disconnecting switch device, including:

First loop, connects and sets external power source；With

Second servo loop, connects and sets some loads, forms electrical isolation, it is characterised in that farther include between described first loop and second servo loop:

High frequency transformer, in the armature winding of described high frequency transformer and secondary windings are divided into described first, second loop and form mutual electromagnetic coupling, signal source it is provided with to drive described armature winding in described first loop, being provided with the input switch connecting each load in described second servo loop, in the input signal according to described input switch encourages described first loop, output difference controls voltage.

Disconnecting switch device the most according to claim 1, it is characterized in that: in described first, second loop, be arranged with connection armature winding and the blocked impedance of secondary windings, by low pass filter receive described in the first loop in blocked impedance two ends output voltage, and be converted to the discernible logical signal of controller by adc circuit.

Disconnecting switch device the most according to claim 1, it is characterized in that: the secondary windings in described second servo loop is equipped with again conducting switch, the PWM waveform according to driving the signal source of described armature winding to produce turns on when low level with the described secondary windings magnetic core that resets.

Disconnecting switch device the most according to claim 3, it is characterised in that: described conducting switch is diode D.

Disconnecting switch device the most according to claim 2, it is characterised in that: described some loads include that the multistage load of blocked impedance in described second servo loop the most in parallel, the load of each of which level connect an input switch.

Disconnecting switch device the most according to claim 5, it is characterised in that: the resistance of described multistage load is successively decreased successively.

7. a disconnecting switch device, including:

First loop, connects and sets external power source；With

Multiple high frequency transformers, in the armature winding of each high frequency transformer and secondary windings are divided into described first, second loop and form mutual electromagnetic coupling, signal source it is provided with to drive described armature winding in described first loop, being provided with the input switch connecting each load in described second servo loop, in encourage described first loop according to switch input signal, output difference controls voltage.

Disconnecting switch device the most according to claim 7, it is characterized in that: in described first, second loop, be arranged with connection armature winding and the blocked impedance of secondary windings, receive blocked impedance two ends output voltage in the first loop by low pass filter, and be converted to a discernible logical signal of controller by adc circuit.

Disconnecting switch device the most according to claim 8, it is characterized in that: described some loads include at least one-level load of blocked impedance in described second servo loop the most in parallel, the load of each of which level connects an input switch, and in encouraging described first loop according to the input signal of different input switches, output difference controls voltage.