CN202268832U

CN202268832U - Low-power-consumption positive temperature coefficient thermistor starter

Info

Publication number: CN202268832U
Application number: CN2011204283957U
Authority: CN
Inventors: 赵云文
Original assignee: Changshu Tianyin Electromechanical Co Ltd
Current assignee: Changshu Tianyin Electromechanical Co Ltd
Priority date: 2011-11-02
Filing date: 2011-11-02
Publication date: 2012-06-06
Anticipated expiration: 2021-11-02

Abstract

The utility model discloses a low-power-consumption positive temperature coefficient thermistor starter, which is mainly used for starting a refrigerator compressor motor as well as an ordinary single-phase alternating current motor. The low-power-consumption positive temperature coefficient thermistor starter is characterized by comprising a bidirectional thyristor T and a positive temperature coefficient thermistor Rt, wherein the end A1 of the bidirectional thyristor T is connected with the secondary winding leading-out end S of the motor, the end A2 of the bidirectional thyristor T is connected with the primary winding leading-out end M of the motor, and the end G of the bidirectional thyristor T is connected with one end of the positive temperature coefficient thermistor Rt; and the other end of the positive temperature coefficient thermistor Rt is connected with the primary winding leading-out end M of the motor. The utility model has the advantages that: the low-power-consumption positive temperature coefficient thermistor starter has the characteristics of simple structure, reliable operation and low cost, and can be easily produced in large batch for large scale production of home appliances.

Description

Low-power consumption semistor starter

Technical field

The utility model relates to a kind of low-power consumption semistor starter, is mainly used in the starting of refrigerator compressor motor, also can be used for the starting of general load motor

Background technology

load motor is formed by a rotor with by the stator that main winding and auxiliary winding constitutes usually.Auxiliary winding wherein also can continue to work when motor normally moves except the effect of playing electric motor starting, so the auxiliary winding circuit of complete load motor can be represented by the auxiliary winding operation circuit and the auxiliary winding starting circuit of parallel connection usually.When motor normally moved, the motor that auxiliary winding is not worked did not then have auxiliary winding operation circuit part wherein.Auxiliary winding starting circuit part is wherein only worked when electric motor starting, behind electric motor starting, needs to realize breaking off.Usually realize by semistor (PTC) element at present.When electric motor starting, starting circuit is worked, and the PTC element is led in the auxiliary winding starting current, causes the PTC element heating, and its resistance rises rapidly, and starting circuit is broken off by basic.When motor normally moves, still must continue to pass through in the PTC element by a less current, to keep the heating resistance of PTC element, stop motor starting circuit when the motor operate as normal, to be had an effect.This power consumption of keeping the PTC heating is usually about 3 watts.Because this motor is widely used, this heating power consumption has caused a large amount of wastes of electric energy.

to this situation, some technical staff in the industry have also carried out some and have improved trial.The utility model people's Chinese Granted publication number discloses a kind of " mutual inductance type non-contact starter " for the patent of invention of CN1294694C; Through making the relevant current signal of Current Transformer sampling; Control the on off operating mode that is connected on the bidirectional triode thyristor in the motor starting circuit; According to the electric current of current transformer sampled point at the beginning of the electric motor starting when electric motor starting is accomplished the normal operation in back big or small situation; When electric motor starting, connect the starting circuit of motor, after electric motor starting is accomplished, break off motor starting circuit.Owing to make the current sample system of Current Transformer have only extremely low heating power consumption, thereby realized not having basically the monophase machine starter of power consumption.

Chinese publication number is that the patent of invention of CN101056080 discloses a kind of " no contact energy-saving starter "; After rectification is carried out in the pressure drop on the inductance coil in the motor main circuit of having connected; Drive the bidirectional triode thyristor that is connected in the motor starting circuit through driving a light-operated bidirectional triode thyristor, also can realize the starter of monophase machine with very low power consumption.China's publication number is that the utility model patent of CN201039045 discloses a kind of " energy-conservation PTC starter "; This technical scheme is the basis with electric capacity charging timer; Bidirectional triode thyristor to being connected in the motor starting circuit has been realized at the beginning of the electric system energising, connecting the control mode of regularly breaking off then; Likewise, when motor normally moves, no longer need the heating of PTC to keep, also can realize the monophase machine starter of low-power consumption.

More than the monophase machine starting of these low-power consumption a common feature is arranged; That is exactly the electronic circuit of certain complexity, needs a wiring board as the substrate of installing, welding usually, and production cost is high; The manufacturing process more complicated is brought certain influence to the starter reliability of products

Summary of the invention

The task of the utility model is to provide that a kind of structure is simpler, the reliable in action low-power consumption semistor starter that cost is low again; It has the manufacturing process characteristic of simple; Make it to be easier to large-scale mass production, be complementary with the large-scale production of household appliances.

The task of the utility model is accomplished like this; A kind of low-power consumption semistor starter; Be characterized in: comprise a bidirectional triode thyristor T and a semistor Rt; The A1 end of said bidirectional triode thyristor T is connected with motor auxiliary winding exit S; The A2 end of bidirectional triode thyristor T is connected with motor main winding exit M, and the G end of bidirectional triode thyristor T is connected with the end of said semistor Rt, and the other end of semistor Rt is connected with motor main winding exit M.

are in this technical scheme; Semistor only uses in the The Trigger of Bidirectional Triode Thyristor circuit; The electric current of flowing through is very little, and usually at tens milliamperes, thereby semistor Rt can do very for a short time; And it is also very little to keep its needed electric current that generates heat; After electric motor starting is accomplished, need keep this starting circuit break off neededly make semistor Rt maintain high temperature, the needed electric current of high-impedance state is also very little, thereby can realize the monophase machine starter function with very little heating power consumption.Experiment shows that this very little heating power consumption can be controlled at about 0.3 watt, compares traditional semistor starter, when having realized that 90% left and right sides is energy-conservation, has kept simple in structure, the reliable in action and the low-cost characteristic of starter itself.Therefore, it is simple to have manufacturing process, is easy to large-scale mass production, can be complementary with the large-scale production of household appliances.

Description of drawings

Fig. 1 is the electrical schematic diagram of the utility model.

Embodiment

can be expressly understood the technical spirit and the beneficial effect of the utility model more for the auditor that the makes Patent Office especially public; The applicant general elaborates with the mode of embodiment below; But the description to embodiment all is not the restriction to the utility model scheme, any according to the utility model design done only for pro forma but not substantial equivalent transformation all should be regarded as the technical scheme category of the utility model.

see also Fig. 1; Load motor is made up of main winding L1 and auxiliary winding L2; These two windings have three exits; Be respectively main winding exit M, auxiliary winding exit S, major-minor winding merging exit Z, be connected with operation capacitor C between common main winding exit M at motor, the auxiliary winding exit S, the main winding exit of motor is connected to power end A; The main winding and auxiliary winding of motor merges exit and is connected to overload protective device F, behind overload protector F, is connected to power end B.

the utility model low-power consumption semistor starter comprises a bidirectional triode thyristor T and a semistor Rt; The A1 end of said bidirectional triode thyristor T is connected with motor auxiliary winding exit S; The A2 end of bidirectional triode thyristor T is connected with motor main winding exit M; The G end of bidirectional triode thyristor T is connected with the end of said semistor Rt, and the other end of semistor Rt is connected with motor main winding exit M.

are when the motor energized; Semistor Rt in the low-power consumption semistor starter is in the normal temperature state; Its resistance is lower normal temperature resistance; The electric current of Rt of flowing through in the starting circuit is enough to trigger bidirectional triode thyristor T conducting, thereby makes the auxiliary winding starting circuit conducting of motor.Along with the operation of motor, the current step of the semistor Rt that flows through makes its heating up, and until near its Curie-point temperature, the current value of the Rt that flows through then progressively reduces can't trigger bidirectional triode thyristor T conducting until it.At this moment, motor starting circuit is broken off by basic, and motor starting process is accomplished.

When starting process entering normal operating condition was accomplished at motor in , the current value of the starting circuit of flowing through was merely the semistor Rt that keeps in the trigger electrode loop that is connected on bidirectional triode thyristor T and generates heat to remain on the required electric current of high-impedance state.Because the current value in bidirectional triode thyristor T trigger electrode loop is minimum; Usually at several milliamperes to tens milliamperes; Therefore the anti-current value of the semistor Rt of use in this loop can be very little; Its volume just can be done very for a short time, and it is also just very little to keep its high temperature, the needed current value of high-impedance state.Like this, when motor got into normal operating condition, the heating power consumption that starter consumes was just very low.Test shows, semistor Rt keeps electric current and can reach below 5 milliamperes, be enough to guarantee the bidirectional triode thyristor T conducting that is not triggered, and the heating power consumption of semistor Rt can control to about 0.3 watt also

Claims

1. A kind of low-power consumption semistor starter; It is characterized in that: comprise a bidirectional triode thyristor T and a semistor Rt; The A1 end of said bidirectional triode thyristor T is connected with motor auxiliary winding exit S; The A2 end of bidirectional triode thyristor T is connected with motor main winding exit M, and the G end of bidirectional triode thyristor T is connected with the end of said semistor Rt, and the other end of semistor Rt is connected with motor main winding exit M