CN201918958U - Single-phase asynchronous motor driving circuit capable of operating in undervoltage state - Google Patents
Single-phase asynchronous motor driving circuit capable of operating in undervoltage state Download PDFInfo
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- CN201918958U CN201918958U CN2011200145182U CN201120014518U CN201918958U CN 201918958 U CN201918958 U CN 201918958U CN 2011200145182 U CN2011200145182 U CN 2011200145182U CN 201120014518 U CN201120014518 U CN 201120014518U CN 201918958 U CN201918958 U CN 201918958U
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Abstract
The utility model discloses a single-phase asynchronous motor driving circuit capable of operating in an undervoltage state, which comprises a main winding branch and an auxiliary winding branch. The main winding branch and the auxiliary winding branch are connected to a power output end of a single-phase power switch after being connected in parallel, the main winding branch consists of a main winding and an undervoltage main winding, the undervoltage main winding is further connected with the main winding in parallel after being serially connected with a contact of a relay, the auxiliary winding branch comprises a running capacitor, a starting capacitor and an auxiliary winding, the starting capacitor is serially connected with a centrifugal switch prior to being connected with the running capacitor in parallel and being connected with the auxiliary winding in series, and a control circuit is further connected to the power output end of the single-phase power switch in parallel and consists of an integrated operational amplifier, a trigger and a relay. The driving circuit is reasonable in design and simple in structure, not only can guarantee normal operation of a motor in a normal voltage state, but also can guarantee safe operation of the motor under the condition of undervoltage.
Description
Technical field
The utility model relates to a kind of monopole asynchronous motor, relates in particular to a kind of drive circuit that can carry out the monopole asynchronous motor of operate as normal under undervoltage condition.
Background technology
Monopole asynchronous motor is a kind of simple in structure, reliable, electrical equipment that cost performance is high, and it not only is widely used in the industrial and agricultural production, and also has in household electrical appliance extremely widely and use.Existing monopole asynchronous motor mainly is made of main winding, auxiliary winding, rotor, running electric capacity and startup electric capacity and centrifugal switch etc.
In actual motion, because the torque of motor is and square being directly proportional of voltage that under the undervoltage condition of undertension, motor torque reduces, when dragging same load like this, rotating speed will descend, and revolutional slip increases, motor current is increased, and motor resistance is constant, it is serious that the motor feels hot; Motor speed descends and to cause the motor coaxle cooling fan rotation speed to descend again in addition, makes the cooling effect variation, is aggravating the heating of motor, makes the motor can't operate as normal, until burning out.In the prior art, for avoiding the under-voltage operation of motor, often can only adopt the under-voltage protection device, its effect is that the in a single day under-voltage operation of protection motor just breaks away from automatically, so existing monopole asynchronous motor can't run well under undervoltage condition.
The utility model content
At the prior art above shortcomings, technical problem to be solved in the utility model is, a kind of reasonable in design, simple structure is provided, can under undervoltage condition, guarantees the monopole asynchronous motor drive circuit of the under-voltage operation of energy of the normal operation of monopole asynchronous motor.
In order to solve the problems of the technologies described above, the monopole asynchronous motor drive circuit of the under-voltage operation of energy of the present utility model, comprise main winding branch road and auxiliary winding branch road, be connected in the power output end of single phase poaer supply switch after main winding branch road and the parallel connection of auxiliary winding branch road, described main winding branch road comprises main winding and under-voltage main winding, this under-voltage main winding is with after the contact of relay is connected, and is in parallel with main winding again; Described auxiliary winding branch road comprises running electric capacity, starting capacitance and auxiliary winding, and is in parallel with running electric capacity after starting capacitance is connected with centrifugal switch, connects with auxiliary winding again; Power output end at the single phase poaer supply switch also is parallel with control circuit, this control circuit comprises integrated transporting discharging, trigger and relay, be in series with resistance between the inverting input of integrated transporting discharging and the output, ground connection behind the in-phase input end series connection in-phase input end resistance of integrated transporting discharging, output at integrated transporting discharging is in series with trigger, ground connection behind the output series relay coil of this trigger.
In said structure, owing to adopt main winding and under-voltage main winding in parallel, and under-voltage main winding is connected with relay contact, when power voltage insufficient, the integrated transporting discharging of control circuit is after voltage sampling compares, send signal, the relay contact closure, thereby make after main winding and the under-voltage main winding parallel connection place in circuit as the actual main winding of under-voltage operation, because winding resistance diminishes after this main winding and the under-voltage main winding parallel connection, so just can under undervoltage condition, also provide needed operating current of machine operation and starting current, realize that motor is in under-voltage normal operation.And under the supply voltage normal condition, triggering signal can not take place in control circuit behind voltage sampling, and relay is failure to actuate, and under-voltage main winding is not worked, and has only main winding and auxiliary winding etc. to be motor stator winding, realizes the normal pressure operation of monophase machine.This circuit still has reasonable in design, simple in structure, advantage easy to implement, that reliability is high.
Description of drawings
Below in conjunction with the drawings and specific embodiments to the utility model. monopole asynchronous motor drive circuit that can under-voltage operation is described in further detail.
Fig. 1 is the utility model. the circuit diagram of a kind of execution mode of monopole asynchronous motor drive circuit of the under-voltage operation of energy;
Fig. 2 is the circuit diagram of control circuit in the circuit shown in Figure 1.
Among the figure, 1-single phase poaer supply switch, 2-fuse, 3-control circuit, 4-relay, 5-running electric capacity, 6-starting capacitance, 7-centrifugal switch, 8-auxiliary winding, 9-under-voltage main winding, 10-main winding, 11-resistance, 12-integrated transporting discharging, 13-trigger, 14-in-phase input end resistance.
Embodiment
Monopole asynchronous motor drive circuit in Fig. 1, the under-voltage operation of energy shown in Figure 2, comprise main winding branch road and auxiliary winding branch road, be connected in the power output end of single phase poaer supply switch 1 after main winding branch road and the parallel connection of auxiliary winding branch road, described main winding branch road comprises main winding 10 and under-voltage main winding 9, this is under-voltage main winding 9 is with after the contact of relay 4 is connected, and is in parallel with main winding 10 again; Described auxiliary winding branch road comprises running electric capacity 5, starting capacitance 6 and auxiliary winding 8, and is in parallel with running electric capacity 5 after starting capacitance 6 is connected with centrifugal switch 7, connects with auxiliary winding 8 again; Power output end at single phase poaer supply switch 1 also is parallel with control circuit 3, this control circuit 3 comprises integrated transporting discharging 12, trigger 13 and relay 4, be in series with resistance 11 between the inverting input of integrated transporting discharging 12 and the output, the in-phase input end series connection in-phase input end resistance 14 back ground connection of integrated transporting discharging 12, output at integrated transporting discharging 12 is in series with trigger 13, ground connection behind output series relay 4 coils of this trigger 13.Power output end at single phase poaer supply switch 1 is in series with fuse 2.
Under the normal pressure situation, control circuit 3 through voltage sampling relatively after, can not send triggering signal, relay 4 can adhesive.Main winding 10 is a stator winding with auxiliary winding 8 altogether, realizes the monopole asynchronous motor normal mode of operation.
Under undervoltage condition, circuit through sampling rate after, send triggering signal, relay 4 adhesives, by the under-voltage masters of relay 4 control around 9 with main winding 10 places in circuit in parallel, main winding as actual motion, because after under-voltage main winding 9 and main winding 10 were in parallel, parallel resistance diminished, like this under undervoltage condition, needed operating current of machine operation or starting current also can be provided, realize the under-voltage mode of operation of monopole asynchronous motor.
This monopole asynchronous motor drive circuit, can guarantee operate as normal under 240V to 180V voltage fluctuation situation, be particularly suitable in supply power voltage instability, outlying district that voltage fluctuation is bigger, necessary electromotor as electromechanical equipments such as refrigerator, air conditioner, electric machineries, help improving the utilance of motor, the phenomenon of avoiding motor to burn out because of the low pressure heating.
Claims (2)
1. monopole asynchronous motor drive circuit that can under-voltage operation, comprise main winding branch road and auxiliary winding branch road, be connected in the power output end of single phase poaer supply switch (1) after main winding branch road and the parallel connection of auxiliary winding branch road, it is characterized in that: described main winding branch road comprises main winding (10) and under-voltage main winding (9), this under-voltage main winding (9) is with after the contact of relay (4) is connected, and is in parallel with main winding (10) again; Described auxiliary winding branch road comprises running electric capacity (5), starting capacitance (6) and auxiliary winding (8), and is in parallel with running electric capacity (5) after starting capacitance (6) is connected with centrifugal switch (7), connects with auxiliary winding (8) again; Power output end at single phase poaer supply switch (1) also is parallel with control circuit (3), this control circuit (3) comprises integrated transporting discharging (12), trigger (13) and relay (4), be in series with resistance (11) between the inverting input of integrated transporting discharging (12) and the output, in-phase input end series connection in-phase input end resistance (14) the back ground connection of integrated transporting discharging (12), output at integrated transporting discharging (12) is in series with trigger (13), ground connection behind output series relay (4) coil of this trigger (13).
2. the monopole asynchronous motor drive circuit of the under-voltage operation of energy according to claim 1 is characterized in that: the power output end at single phase poaer supply switch (1) is in series with fuse (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200145182U CN201918958U (en) | 2011-01-18 | 2011-01-18 | Single-phase asynchronous motor driving circuit capable of operating in undervoltage state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200145182U CN201918958U (en) | 2011-01-18 | 2011-01-18 | Single-phase asynchronous motor driving circuit capable of operating in undervoltage state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201918958U true CN201918958U (en) | 2011-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200145182U Expired - Fee Related CN201918958U (en) | 2011-01-18 | 2011-01-18 | Single-phase asynchronous motor driving circuit capable of operating in undervoltage state |
Country Status (1)
| Country | Link |
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| CN (1) | CN201918958U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023424A (en) * | 2011-09-23 | 2013-04-03 | 苏州汇川技术有限公司 | Low-voltage protection method and crane with low-voltage protection function |
| CN109831125A (en) * | 2017-11-23 | 2019-05-31 | 浙江富莱欧机电有限公司 | A kind of double value capacitor asynchronous motor low pressure operation power-assisted start-up circuit |
-
2011
- 2011-01-18 CN CN2011200145182U patent/CN201918958U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023424A (en) * | 2011-09-23 | 2013-04-03 | 苏州汇川技术有限公司 | Low-voltage protection method and crane with low-voltage protection function |
| CN103023424B (en) * | 2011-09-23 | 2015-12-02 | 苏州汇川技术有限公司 | Low-voltage protection method and there is the crane of under-voltage protection function |
| CN109831125A (en) * | 2017-11-23 | 2019-05-31 | 浙江富莱欧机电有限公司 | A kind of double value capacitor asynchronous motor low pressure operation power-assisted start-up circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20160118 |
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| EXPY | Termination of patent right or utility model |