CN202009356U - Motor starter with ultralow power consumption - Google Patents
Motor starter with ultralow power consumption Download PDFInfo
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- CN202009356U CN202009356U CN2011201326293U CN201120132629U CN202009356U CN 202009356 U CN202009356 U CN 202009356U CN 2011201326293 U CN2011201326293 U CN 2011201326293U CN 201120132629 U CN201120132629 U CN 201120132629U CN 202009356 U CN202009356 U CN 202009356U
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Abstract
The utility model discloses a motor starter with ultralow power consumption, comprising a positive temperature coefficient thermosensitive resistor, a bidirectional silicon controlled rectifier, a rectifier bridge composed of diodes, an enhanced field effect transistor, a voltage-regulator diode and a plurality of capacitance-resistance elements. When a compressor motor starts, an AC power supply charges a capacitor, driving voltage conducts a gate pole of an NMOS transistor, conducting current of the gate pole triggers conduction of the bidirectional silicon controlled rectifier, and a secondary winding circuit of the compressor motor is electrified; and after the motor starts, the capacitor is gradually fully charged, the driving voltage of the gate pole of the NMOS transistor gradually reduces, when the driving voltage is lower than start voltage of the NMOS transistor, drain and source of the NMOS transistor is cut off, the bidirectional silicon controlled rectifier is cut off due to the losing of triggering current, and the secondary winding circuit of the compressor motor is cut off. When the start of the motor starter with ultralow power consumption completes, power consumption of complete machine stable state is low and reaches milliwatt level, thereby substantially improving energy saving efficiency. Besides, with few electronic components, the motor starter is simple in circuit, stable and reliable in work, good in performance consistency and strong in anti-interference capability.
Description
Technical field
The utility model relates to a kind of motor starter, particularly a kind of super low-power consumption motor starter, and it is mainly used in the starting of the compressor electric motor of tape running electric capacity, also can be used for the starting of general load motor.
Background technology
Referring to Fig. 1, present refrigerant compressor adopts the split-phase type monopole asynchronous motor mostly, for electronic function is started voluntarily, on the stator core of motor, be provided with two cover windings, promptly in order to the main winding 51 ' of generation main field with in order to produce the auxiliary winding 52 ' of auxiliary magnetic field.The synthetic rotating magnetic field cutting stationary rotor in major and minor magnetic field, energising back produces certain electromagnetic torque, make rotor begin rotation, rotor torque after the starting will increase gradually, when rotating speed reaches 75% ~ 80% synchronous speed, cut off auxiliary winding 52 ' loop, motor still can continue to rotate raising speed, until reaching and external impedance torque balance, steady running.Usually utilize positive temperature coefficient thermistor 54 ' at present, be that the PTC starter is finished starting process, on the auxiliary winding 52 ' of refrigeration compressor motor, be in series with the PTC starter, the PTC starter is in little resistance conducting state at normal temperatures, thermal effect when when starting because of electric current, PTC element temperature at short notice raises, after reaching Curie point, its resistance value rapidly increases to more than tens kilo-ohms, this moment, the impedance ratio with auxiliary winding 52 ' was equivalent to open circuit, the electric current of Chuan Lian starting winding is reduced to below tens milliamperes with it, and at this moment motor starting process is finished, and enters normal operation.When motor runs well, still there is tens milliamperes the electric current of keeping to pass through in the PTC element, to keep the heating of PTC element, stop the electric motor starting winding when the motor operate as normal, to be had an effect, this power consumption of keeping the PTC element heating is usually about 3W.Because this motor is widely used, this heating power consumption has caused a large amount of wastes of electric energy.
Chinese patent ZL200520068558.X discloses a kind of mutual inductance type non-contact starter, is used to start load motor.By a current transformer, the current signal that sampling is relevant, the conducting of control bidirectional triode thyristor, heating power consumption that can the Control current sampling system.But the parameter that it need select suitable current transformer reaches assurance triggering bidirectional triode thyristor when electric motor starting, and do not trigger bidirectional triode thyristor when motor normally moves.The selection of this parameter is just relatively more difficult, needs examination repeatedly to gather.And, when really putting into production, because the separation property of component parameter is difficult to guarantee that above-mentioned requirements one satisfies surely.In concrete practice was quoted, this circuit often produced misoperation, and promptly after motor started, bidirectional triode thyristor also can be opened, and circuit working is stable inadequately, causes unnecessary loss.After even in a single day current mutual-inductor parameter chooses, for different motor loads, do not have general applicability, for different motors, the parameter request difference of current transformer is gone so be difficult to put in the actual production application.
Chinese patent ZL 200710030846.X discloses a kind of AC motor starter, and it and alternating current machine starting windings in series are used.Comprised bidirectional switch circuit and timing circuit, formed the bidirectional switch circuit, formed timing circuit, control bidirectional switch circuit by electric capacity, triode, resistance by rectifier bridge and metal-oxide-semiconductor.Though this circuit can be realized the starting of alternating current machine, this circuit is after starting, and the voltage that bear at the triode two ends approaches supply voltage, thus must adopt withstand voltage higher triode, thus increased cost.After electric motor starting was finished, triode was in conducting state, and this electric current is by motor auxiliary winding, resistance and triode, can consume many energy, though this utility model claims and can drop to below 0.5 watt that according to new standard, this steady state power consumption still is far from reaching requirement steady state power consumption.This circuit does not add voltage-stabiliser tube between the grid of metal-oxide-semiconductor and source electrode, be easy to cause the damage of metal-oxide-semiconductor grid.
The utility model content
Technical problem to be solved in the utility model is to overcome existing above-mentioned deficiency in the prior art, and provides a kind of reasonable in design, the motor starter of simple in structure, super low-power consumption, dependable performance.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of super low-power consumption motor starter is characterized in that: it comprises a bidirectional triode thyristor, rectifier bridge, a transistor, a voltage stabilizing didoe and the some Resistor-Capacitor Unit of being made up of four diodes; The first anode of bidirectional triode thyristor links to each other with the alternating current machine auxiliary winding, and the second plate of bidirectional triode thyristor links to each other with a brachium pontis of AC power, alternating current machine main winding and rectifier bridge, and the gate pole of bidirectional triode thyristor links to each other with another brachium pontis of rectifier bridge; A dc output end of rectifier bridge links to each other with an end of first resistance and an end of the 4th resistance, the other end of first resistance links to each other with an end of first electric capacity, the series circuit of the two ends of first electric capacity the 5th resistance in parallel and the 6th resistance, the other end of first electric capacity and voltage stabilizing didoe, one end of the parallel circuits of second electric capacity and second resistance and an end of the 3rd resistance link to each other, voltage stabilizing didoe, the other end of second electric capacity and the second resistance parallel circuits links to each other with another dc output end of transistor and rectifier bridge, the other end of the 3rd resistance links to each other with transistor, and the other end of the 4th resistance links to each other with transistor.
It also comprises a positive temperature coefficient thermistor the utility model, one end of described positive temperature coefficient thermistor is connected with the second plate of bidirectional triode thyristor, and the other end links to each other with a brachium pontis of AC power, alternating current machine main winding and rectifier bridge.
Transistor described in the utility model is the enhancement mode field effect transistor, the source electrode of enhancement mode field effect transistor links to each other with the parallel circuits of voltage stabilizing didoe, second electric capacity, second resistance, the gate pole of enhancement mode field effect transistor links to each other with the 3rd resistance, and the collector electrode of enhancement mode field effect transistor links to each other with the 4th resistance.
Transistor described in the utility model is an igbt, the emitter of igbt links to each other with the parallel circuits of voltage stabilizing didoe, second electric capacity, second resistance, the gate pole of igbt links to each other with the 3rd resistance, and the drain electrode of igbt links to each other with the 4th resistance.
The utility model compared with prior art has following positive effect: electronic devices and components are few, circuit is simple, cost is low, dependable performance, and the power consumption of whole design circuit is extremely low, have only usually below 10 milliwatts.
Description of drawings
Fig. 1 is the circuit diagram of prior art.
Fig. 2 is the circuit diagram of the utility model embodiment 1.
Fig. 3 is the circuit diagram of the utility model embodiment 2.
Fig. 4 is the circuit diagram of the utility model embodiment 3.
Fig. 5 is the circuit diagram of the utility model embodiment 4.
Among the figure: E-AC power, La-motor main winding, Lb-motor auxiliary winding, Q1-enhancement mode field effect transistor, T1-igbt, PTC-positive temperature coefficient thermistor, T-bidirectional triode thyristor, BR-rectifier bridge, DZ-voltage stabilizing didoe.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and by embodiment.
Embodiment 1:
Referring to Fig. 2, present embodiment comprises a positive temperature coefficient thermistor PTC, a bidirectional triode thyristor T, rectifier bridge BR, enhancement mode field effect transistor Q1, a voltage stabilizing didoe DZ and the some Resistor-Capacitor Unit of being made up of four diode D1, D2, D3, D4.In the present embodiment, enhancement mode field effect transistor Q1 adopts the NMOS pipe, the first anode A1 of bidirectional triode thyristor T links to each other with alternating current machine auxiliary winding Lb, the second plate A2 of bidirectional triode thyristor T is connected with the end of positive temperature coefficient thermistor PTC, the other end of positive temperature coefficient thermistor PTC and AC power one end A, the brachium pontis of alternating current machine main winding La and rectifier bridge BR links to each other, the gate pole G of bidirectional triode thyristor T links to each other with another brachium pontis of rectifier bridge BR, the dc output end of rectifier bridge BR links to each other with an end of first resistance R 1 and an end of the 4th resistance R 4, the other end of first resistance R 1 links to each other with an end of first capacitor C 1, the series circuit of the two ends of first capacitor C 1 the 5th resistance R 5 in parallel and the 6th resistance R 6, the other end of first capacitor C 1 and voltage stabilizing didoe DZ, one end of one end of the parallel circuits of second capacitor C 2 and second resistance R 2 and the 3rd resistance R 3 links to each other, voltage stabilizing didoe DZ, the other end of second capacitor C 2 and second resistance R, 2 parallel circuitss links to each other with the source S of enhancement mode field effect transistor Q1 and another dc output end of rectifier bridge BR, the other end of the 3rd resistance R 3 links to each other with the gate pole G of enhancement mode field effect transistor Q1, and the other end of the 4th resistance R 4 links to each other with the drain D of enhancement mode field effect transistor Q1.
At the beginning of motor begins starting, voltage on first capacitor C 1 is zero, when just powering on, electric current is got back to AC power other end B by a brachium pontis, first resistance R 1, first capacitor C 1, another brachium pontis of voltage stabilizing didoe DZ, rectifier bridge BR, bidirectional triode thyristor T, the motor auxiliary winding Lb of an end A, the rectifier bridge BR of AC power E, this path gives first capacitor C 1 charging, this moment, voltage stabilizing didoe DZ was operated in the voltage stabilizing state, the gate pole G of NMOS pipe Q1 has driving voltage, this voltage is higher than the turning-on voltage of NMOS pipe Q1, so NMOS pipe Q1 conducting.This moment, electric current was held by the source electrode D of power supply one end A, brachium pontis of rectifier bridge BR, the 4th resistance R 4, NMOS pipe Q1 again, and the S end is got back to another brachium pontis of rectifier bridge BR, bidirectional triode thyristor T, motor auxiliary winding Lb return AC power other end B from draining again.Because this current ratio is bigger, can drive bidirectional triode thyristor T and make it conducting.After the bidirectional triode thyristor T conducting, positive temperature coefficient thermistor PTC energising, motor auxiliary winding Lb flows through very big electric current, at this moment electric motor starting.Positive temperature coefficient thermistor PTC plays a protective role in the loop simultaneously; even bidirectional triode thyristor T is breakdown; flow through very big electric current on motor auxiliary winding Lb loop and the positive temperature coefficient thermistor PTC; the resistance of positive temperature coefficient thermistor PTC sharply increases; the electric current in motor auxiliary winding Lb loop is limited in the very little scope; can protect motor not burnt out, increase the security reliability of system.After the electric motor starting, electric charge on first capacitor C 1 slowly increases, voltage slowly rises, rise to when equating with AC supply voltage, just can't continue to have charged, this moment, voltage stabilizing didoe DZ both end voltage trended towards zero, NMOS pipe Q1 gate pole G driving voltage also trends towards zero, NMOS pipe Q1 can't conducting, and bidirectional triode thyristor T closes, and motor auxiliary winding Lb loop just is disconnected.This moment, electric motor starting was finished, starting circuit is in the state that zero energy consumes substantially, unique consumption is that the 5th resistance R 5, the 6th resistance R 6 that are connected in parallel on first capacitor C, 1 two ends produce, because the voltage on first capacitor C 1 is very high, first capacitor C 1 is by the 5th resistance R 5,6 discharges of the 6th resistance R, can consume a little power, but the resistance of the 5th resistance R 5, the 6th resistance R 6 is very big, generally can reach tens megaohms, so the power consumption of entire circuit after starting is very little, generally below 10 milliwatts.After the outage, the electric charge on first capacitor C 1 again can refill electric charge at one minute with interior by the 5th resistance R 5,6 discharges of the 6th resistance R, once more actuating motor.
Starting time of the present utility model can be increased first resistance R 1 and can be prolonged the starting time by 1 control of first resistance R, reduces first resistance R 1 and can shorten the starting time, so the starting time is easy to adjust.
The utility model adopts enhancement mode field effect transistor Q1 pipe to be voltage driven element, can avoid the big drawback of discreteness of triode current amplification factor commonly used, drives stability and greatly improves.Be connected in parallel between the enhancement mode field effect transistor Q1 second capacitor C 2 effectively filtering be added in the disturbing pulse of gate pole G, can make enhancement mode field effect transistor Q1 when turn-offing, be unlikely to produce misleading, improved antijamming capability.Between the gate pole G of enhancement mode field effect transistor Q1 and drain electrode S, connect voltage stabilizing didoe DZ, play the effect of clamper gate voltage, make it to be unlikely to overvoltage and damage enhancement mode field effect transistor Q1.
Embodiment 2:
Referring to Fig. 3, unique difference of present embodiment and embodiment 1 is to make the enhancement mode field effect transistor Q1 among the embodiment 1 into igbt (IGBT) T1, the emitter E of igbt T1 links to each other with the parallel circuits of voltage stabilizing didoe DZ, second capacitor C 2, second resistance R 2, the gate pole G of igbt T1 links to each other with the 3rd resistance R 3, the collector electrode C of igbt T1 links to each other with the 4th resistance R 4, and other design circuit is identical with embodiment 1.
Embodiment 3:
Referring to Fig. 4, unique difference of present embodiment and embodiment 1 is that positive temperature coefficient thermistor PTC is removed, the first anode A1 of bidirectional triode thyristor T links to each other with alternating current machine auxiliary winding Lb, the second plate A2 of bidirectional triode thyristor T links to each other with the brachium pontis of AC power E, alternating current machine main winding La and rectifier bridge BR, and the gate pole G of bidirectional triode thyristor T links to each other with another brachium pontis of rectifier bridge BR.Other design circuit is identical with embodiment 1.
Embodiment 4:
Referring to Fig. 5, unique difference of present embodiment and embodiment 2 is that positive temperature coefficient thermistor PTC is removed, the first anode A1 of bidirectional triode thyristor T links to each other with alternating current machine auxiliary winding Lb, the second plate A2 of bidirectional triode thyristor T links to each other with the brachium pontis of AC power E, alternating current machine main winding La and rectifier bridge BR, and the gate pole G of bidirectional triode thyristor T links to each other with another brachium pontis of rectifier bridge BR.Other design circuit is identical with embodiment 2.
Though the utility model with embodiment openly as above; but it is not in order to limit protection range of the present utility model; any technical staff who is familiar with this technology, change and the retouching done in not breaking away from design of the present utility model and scope all should belong to protection range of the present utility model.And the title that the utility model parts are got also can be different, allly conceive equivalence or the simple change that described structure, feature and principle are done according to the utility model patent, are included in the protection range of the utility model patent.
Claims (4)
1. super low-power consumption motor starter, it is characterized in that: it comprises a bidirectional triode thyristor, rectifier bridge, a transistor, a voltage stabilizing didoe and the some Resistor-Capacitor Unit of being made up of four diodes; The first anode of bidirectional triode thyristor links to each other with the alternating current machine auxiliary winding, and the second plate of bidirectional triode thyristor links to each other with a brachium pontis of AC power, alternating current machine main winding and rectifier bridge, and the gate pole of bidirectional triode thyristor links to each other with another brachium pontis of rectifier bridge; A dc output end of rectifier bridge links to each other with an end of first resistance and an end of the 4th resistance, the other end of first resistance links to each other with an end of first electric capacity, the series circuit of the two ends of first electric capacity the 5th resistance in parallel and the 6th resistance, the other end of first electric capacity and voltage stabilizing didoe, one end of the parallel circuits of second electric capacity and second resistance and an end of the 3rd resistance link to each other, voltage stabilizing didoe, the other end of second electric capacity and the second resistance parallel circuits links to each other with another dc output end of transistor and rectifier bridge, the other end of the 3rd resistance links to each other with transistor, and the other end of the 4th resistance links to each other with transistor.
2. super low-power consumption motor starter according to claim 1, it is characterized in that: it also comprises a positive temperature coefficient thermistor, one end of described positive temperature coefficient thermistor is connected with the second plate of bidirectional triode thyristor, and the other end links to each other with a brachium pontis of AC power, alternating current machine main winding and rectifier bridge.
3. super low-power consumption motor starter according to claim 1 and 2, it is characterized in that: described transistor is the enhancement mode field effect transistor, the source electrode of enhancement mode field effect transistor links to each other with the parallel circuits of voltage stabilizing didoe, second electric capacity, second resistance, the gate pole of enhancement mode field effect transistor links to each other with the 3rd resistance, and the collector electrode of enhancement mode field effect transistor links to each other with the 4th resistance.
4. super low-power consumption motor starter according to claim 1 and 2, it is characterized in that: described transistor is an igbt, the emitter of igbt links to each other with the parallel circuits of voltage stabilizing didoe, second electric capacity, second resistance, the gate pole of igbt links to each other with the 3rd resistance, and the drain electrode of igbt links to each other with the 4th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201326293U CN202009356U (en) | 2011-04-29 | 2011-04-29 | Motor starter with ultralow power consumption |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201326293U CN202009356U (en) | 2011-04-29 | 2011-04-29 | Motor starter with ultralow power consumption |
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| Publication Number | Publication Date |
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| CN202009356U true CN202009356U (en) | 2011-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201326293U Expired - Lifetime CN202009356U (en) | 2011-04-29 | 2011-04-29 | Motor starter with ultralow power consumption |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158150A (en) * | 2011-04-29 | 2011-08-17 | 杭州星帅尔电器股份有限公司 | Ultra-low power consumption motor starter |
-
2011
- 2011-04-29 CN CN2011201326293U patent/CN202009356U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158150A (en) * | 2011-04-29 | 2011-08-17 | 杭州星帅尔电器股份有限公司 | Ultra-low power consumption motor starter |
| CN102158150B (en) * | 2011-04-29 | 2013-06-19 | 杭州星帅尔电器股份有限公司 | Ultra-low power consumption motor starter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111012 Effective date of abandoning: 20130619 |
|
| RGAV | Abandon patent right to avoid regrant |