CN203774765U - Electric valve phase sequence circuit - Google Patents

Abstract

The utility model discloses an electric valve phase sequence circuit comprising a power supply input end vdd, fixed resistors, a common capacitor, a polarity electrolytic capacitor, common diodes, voltage-stabilizing diodes, a light-emitting diode and triodes. A power supply input shaping circuit is formed by the power supply input end vdd, the fixed resistors R8 and R9, the triode Q5 and the polarity electrolytic capacitor C22. A phase sequence protection indication circuit is formed by the common diodes D1, D2 and D4, the fixed resistors R1, R2, R4 and R7 and the light-emitting diode U6. A time-delay circuit is formed by the voltage-stabilizing diodes Z1 and Z2, the common diode D3, the fixed resistors R5 and R6, the common capacitor C6, and the triodes Q3 and Q4. Automatic phase commutation and open-phase and under-voltage protection can be realized.

Description

A kind of electrically operated valve phase sequence circuit

Technical field

The utility model relates to a kind of electrically operated valve phase sequence circuit.

Background technology

In electrically operated valve uses, can there is following defect: if 1 user does not correctly connect power phase, when startup, can cause electrically operated valve out of control, cause valve to damage; If 2 user's Power supplies or power line wiring connect one mutually or virtual connection less, can cause motor phase failure, cause motor phase failure to move and damage; 3, be used in outlying district at electrically operated valve, brownout (330V following) or too high, can cause electrically operated valve cisco unity malfunction, and as A.C. contactor can not adhesive, motor can not normally start etc.

Phase sequence circuit of the prior art is single channel; export or be positive (low-voltage 0); for anti-phase (high voltage 1); but under phase shortage and undervoltage condition; output is all high voltage (1); in Single Chip Microcomputer (SCM) system, just can not distinguish so anti-phase and phase shortage, thereby can not realize automatic commutation and phase shortage under-voltage protection.

Utility model content

For solving the problems of the technologies described above, the utility model provides a kind of electrically operated valve phase sequence circuit, to reach the object of automatic commutation and phase shortage under-voltage protection.

For achieving the above object, the technical solution of the utility model is as follows:

A kind of electrically operated valve phase sequence circuit, comprises power input vdd, fixed resistor, common electric capacity, polarity electrochemical capacitor, general-purpose diode, voltage stabilizing didoe, light-emitting diode, triode;

Power input vdd, fixed resistor R8, R9, triode Q5, polarity electrochemical capacitor C22 composition power supply input shaper circuit;

General-purpose diode D1, D2, D4, fixed resistor R1, R2, R4, R7, light-emitting diode U6 forms phase sequence indicating circuit;

Voltage stabilizing didoe Z1, Z2, general-purpose diode D3, fixed resistor R5, R6, common capacitor C 6, triode Q3, Q4 form delay circuit.

By technique scheme, a kind of electrically operated valve phase sequence circuit that the utility model provides, designs a set of combinational circuit, oneway circuit is combined into two-way: A unit and B unit, A unit is consistent with B element circuit, at positive phase time, A work output 0, B does not work and exports 1; When reverse, A do not work output 1, B do not work output 0; Other logic state (00,11) is phase shortage or under-voltage condition, has realized automatic commutation and the phase shortage under-voltage protection of electrically operated valve.

The utility model designs a set of combinational circuit and realizes phase sequence and the under-voltage reliable Detection of phase shortage, solves the automatic commutation of electrically operated valve and establishes, this scheme of phase shortage under-voltage protection; Can realize the reliable of circuit phase sequence and accurately detect, prevent the misoperation of motor, reduce the accident that valve damages, reduce the situation that motor burns due to phase shortage.

Brief description of the drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below.

Fig. 1 is the circuit diagram of the disclosed a kind of electrically operated valve phase sequence circuit of the utility model embodiment.

Vdd power end

R1-R9 fixed resistor

The common electric capacity of C6

C22 polarity electrochemical capacitor

D1-D4 general-purpose diode

Z1-Z2 voltage stabilizing didoe

U6 light-emitting diode

Q3, Q4, Q5 triode

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described.

With reference to figure 1, a kind of electrically operated valve phase sequence circuit, comprises power input vdd, fixed resistor, common electric capacity, polarity electrochemical capacitor, general-purpose diode, voltage stabilizing didoe, light-emitting diode, triode;

Power input vdd, fixed resistor R8, R9, triode Q5, polarity electrochemical capacitor C22 composition power supply input shaper circuit;

General-purpose diode D1, D2, D4, fixed resistor R1, R2, R4, R7, light-emitting diode U6 forms phase sequence indicating circuit;

Voltage stabilizing didoe Z1, Z2, general-purpose diode D3, fixed resistor R5, R6, common capacitor C 6, triode Q3, Q4 form delay circuit.

By technique scheme, a kind of electrically operated valve phase sequence circuit that the utility model provides, designs a set of combinational circuit, oneway circuit is combined into two-way: A unit and B unit, A unit is consistent with B element circuit, at positive phase time, A work output 0, B does not work and exports 1; When reverse, A do not work output 1, B do not work output 0; Other logic state (00,11) is phase shortage or under-voltage condition, has realized automatic commutation and the phase shortage under-voltage protection of electrically operated valve.

Realize phase sequence and the under-voltage reliable Detection of phase shortage by designing a set of combinational circuit, solve the automatic commutation of electrically operated valve and establish, this scheme of phase shortage under-voltage protection; Can realize the reliable of circuit phase sequence and accurately detect, prevent the misoperation of motor, reduce the accident that valve damages, reduce the situation that motor burns due to phase shortage.

To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.To be apparent for those skilled in the art to the multiple amendment of above-described embodiment, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (1)

1. an electrically operated valve phase sequence circuit, is characterized in that, comprises power input vdd, fixed resistor, common electric capacity, polarity electrochemical capacitor, general-purpose diode, voltage stabilizing didoe, light-emitting diode, triode;

Power input vdd, fixed resistor R8, R9, triode Q5, polarity electrochemical capacitor C22 composition power supply input shaper circuit;

General-purpose diode D1, D2, D4, fixed resistor R1, R2, R4, R7, light-emitting diode U6 forms phase sequence indicating circuit;

Voltage stabilizing didoe Z1, Z2, general-purpose diode D3, fixed resistor R5, R6, common capacitor C 6, triode Q3, Q4 form delay circuit.