CN2238505Y - Liquid variable resistance voltage reducing starter for squirrel-cage motor - Google Patents
Liquid variable resistance voltage reducing starter for squirrel-cage motor Download PDFInfo
- Publication number
- CN2238505Y CN2238505Y CN 95211953 CN95211953U CN2238505Y CN 2238505 Y CN2238505 Y CN 2238505Y CN 95211953 CN95211953 CN 95211953 CN 95211953 U CN95211953 U CN 95211953U CN 2238505 Y CN2238505 Y CN 2238505Y
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- resistance
- movable plate
- plate electrode
- liquid
- control circuit
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- Expired - Fee Related
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Abstract
The utility model provides a liquid variable resistance voltage reducing starter for squirrel-cage motors, which comprises a cabinet body; a starting control circuit and a resistance box are arranged in the cabinet body; static polar plates and dynamic polar plates are arranged in the resistance box; a dynamic polar plate mechanical transmission device is arranged in the cabinet body. The utility model is characterized in that the resistance box is provided with three independent box chambers which are respectively filled with resistance liquid; three static polar plates are respectively fixed in the respective box chamber; three dynamic polar plates which are hung in the respective box chamber are respectively and fixedly connected with the dynamic polar plate mechanical transmission device to form three variable liquid resistance, and the three liquid resistance are connected in series in the three phase rotor loops of the started motor by the starting control circuit.
Description
The utility model relates to a kind of high-power squirrel-cage motor and work the electromechanical equipment of employing.
The squirrel-cage motor start mode of 30-315kw has auto-induction voltage-reduced starting and reactor starting in the prior art, its shortcoming is that structure cost bigger than normal is higher, energy consumption is big, temperature rise is fast, can not start continuously, because twice starting of temperature relation needs more than 40 minutes at interval, easily burn transformer as starting by force; Also have a kind of bifurcation starting, △ to move operational mode, it only is suitable for starting under no load, fail to start during heavy duty.
The utility model purpose provides a kind of squirrel-cage motor liquid variable resistance voltage reducing starter, to overcome the defective that known start mode exists, makes every effort to reduce the starter cost, realizes stepless starting and starting continuously, produces actual needs to satisfy.
The technical solution adopted in the utility model is: this squirrel-cage motor liquid variable resistance voltage reducing starter, comprise cabinet, be equiped with start control circuit and resistance box in the cabinet, be provided with static plate electrode and movable plate electrode in the resistance box, also have moving utmost point utmost point mechanical driving device in the cabinet, it is characterized in that: said resistance box has three separate case chamber structures; Three case chambeies are loaded with the resistor fluid as resistive element respectively; Three static plate electrodes are separately fixed at separately in the case chamber, three movable plate electrodes are suspended to respectively in the case chamber with three corresponding settings of static plate electrode, thereby and be mechanically connected to the movable plate electrode mechanical driving device respectively and make three movable plate electrodes can relative three static plate electrodes do straight-line displacement synchronously and change that distance forms three equivalent variable liquid resistance that change that are electric insulation each other between fixed, moving electrode; Each static plate electrode is electrically connected with start control circuit by the copper master tape, each movable plate electrode is electrically connected with start control circuit by software lead and copper master tape, when starting to work, by start control circuit three variable liquid resistance are serially connected with respectively by in the rotor loop of three phases of actuating motor, realize reduced voltage starting.
The advantage of this squirrel-cage motor liquid variable resistance voltage reducing starter is: 1, because the resistance box area is bigger, and carrying liquid is more, during starting temperature rise slow, can realize continuous starting; 2, starting the time is stepless variation, level and smooth, less to being impacted by actuating motor, can prolong motor useful life; 3, starting torque big, can realize heavy-load start; 4, transfer liquid composition or concentration are adjusted electrical quantity easily, satisfy different electric motor starting needs, and versatility is good; 5, compact conformation, reasonable, maintenance is little, failure rate is low; 6, cost is cheap relatively.
Fig. 1 is the organigram of this squirrel-cage motor liquid variable resistance voltage reducing starter.
Fig. 2 is the start control circuit schematic diagram.
The embodiment that provides below in conjunction with accompanying drawing further describes.Referring to Fig. 1, this squirrel-cage motor Liquid Variable-resistance reduced voltage starter (hereinafter to be referred as starter) includes cabinet (1), cabinet (1) bottom is fixed with resistance box (2), having dividing plate (3) in the resistance box (2) makes resistance box (2) form three separate case chamber (4) structures, be fixed with static plate electrode (5) in each case chamber (4) and suspention has movable plate electrode (6), be loaded with resistor fluid (7) in each case chamber (4) respectively as resistive element, can select for use akaline liquid such as NaOH etc. as resistor fluid, cabinet also is provided with the movable plate electrode mechanical driving device in (1), it includes by axle bed (20) rolling bearing in cabinet (1) and be higher than belt pulley (9) and belt (10) and the actuating motor (11) that screw mandrel (8) that resistance box (2) is provided with is connected in screw mandrel (8) one ends, screw mandrel (8) is provided with three screws (12), each screw (12) is connected by interior three moving utmost point utmost points (6) machinery in insulated connecting rod (13) and three the case chambeies (4) that place resistance box (2), insulated connecting rod (13) utilizes insulating material to make, cabinet (1) internal upper part is provided with start control circuit, the static plate electrode (5) in each case chamber (4) is electrically connected with start control circuit by copper master tape (14), each movable plate electrode (6) is electrically connected with start control circuit by software lead (15), software lead (15) has been selected software weaving copper cash for use in this example, like this by the resistor fluid in three case chambeies (4) and the case chamber, and it is moving, static plate electrode formed three be three of electric insulation each other can the equivalent liquid resistance that changes, three variable resistors are serially connected with the reduced voltage starting of being realized interconnected cage motor in the rotor loop of three phases of actuating motor respectively by start control circuit.Need to prove and only establish a screw on the screw mandrel (8), by three connecting rods (13) three movable plate electrodes are connected on this screw again, also can realize the movable plate electrode motion.Said in addition movable plate electrode transmission device also can utilize actuating motor (11) and mechanical reducer mechanical connection, and the mechanical reducer output shaft is connected with screw mandrel (8) machinery and realizes the rotation of screw mandrel (8).
The start control circuit schematic diagram that provides referring to Fig. 2, in by the current supply circuit of actuating motor (16), be provided with automatic air-break switch (QF), and three of will be formed by case chamber (4), dynamic and static pole plate (6) (5), resistor fluid (7) by starting contactor (1KM) and operation contactor (2KM) can insert by in the current supply circuit of actuating motor (16) by the equivalent liquid resistance (RS) that changes, and wherein three static plate electrodes (5) of three liquid resistances (RS) pass through separately that copper master tape (14) is electrically connected with starting contactor (1KM); And three movable plate electrodes are electrically connected with operation contactor (2KM) by software lead (15) and copper master tape (17); Liquid resistance (RS) is serially connected with respectively by in the rotor loop of three phases of actuating motor (16), ammeter (21) voltmeter (18) and starting button (19) etc. also are installed on cabinet body door.Because of start control circuit is the known technology category, so its circuit details is omitted.
Referring to Fig. 1, Fig. 2, utilize the course of work of this starter started squirrel-cage formula motor to be: closed automatic air-break switch (QF), press starting button (19), then starting contactor (1KM) energising adhesive and self-locking (moving contactor place open-circuit condition this moment), then three liquid resistances (RS) are serially connected with by in the current supply circuit of actuating motor (16), when actuating motor (11) energising work rotates screw mandrel (8) location by belt transmission, then make three screws (12) translation synchronously, it is close to static plate electrode (5) gradually by far point to drive three movable plate electrodes (6) that are connected with screw (12), distance is equivalent to liquid resistance (RS) resistance from large to small by change near procedure far away between the relative static plate electrode (5) of movable plate electrode (6) on circuit, when reaching minimum value, liquid resistance (promptly moves, distance is minimum between static plate electrode, be generally 4 millimeter) time, make the starting contactor outage be open-circuit condition (being about to the liquid resistance excision) by travel switch in the start control circuit and auxiliary relay (do not omit among the figure and draw), make operation contactor energising adhesive simultaneously, be activated the motor normal operation input, after this actuating motor (11) drives electrode (6) and turns back to original position, treats starting next time.
Starter according to such scheme and embodiment make starts stepless speedup, and is level and smooth, do not have to impact to electric power system with by driven equipment and disturbs, and prolonged motor and by the useful life of driven equipment.
Claims (3)
1, squirrel-cage motor liquid variable resistance voltage reducing starter, comprise cabinet, be equiped with start control circuit and resistance box in the cabinet, be provided with static plate electrode and movable plate electrode in the resistance box, also have the movable plate electrode mechanical driving device in the cabinet, it is characterized in that: said resistance box has three separate case chamber structures; Three case chambeies are loaded with the resistor fluid as resistive element respectively; Three static plate electrodes are separately fixed at separately in the case chamber, three movable plate electrodes are suspended to respectively in the case chamber with three corresponding settings of static plate electrode, thereby and be mechanically connected to the movable plate electrode mechanical driving device respectively and make three movable plate electrodes can relative three static plate electrodes do straight-line displacement synchronously and change that distance forms three equivalent variable liquid resistance that change that are electric insulation each other between fixed, moving electrode; Each static plate electrode is electrically connected with start control circuit by the copper master tape, each movable plate electrode is electrically connected with start control circuit by software lead and copper master tape, when starting to work, by start control circuit three variable liquid resistance are serially connected with respectively by in the rotor loop of three phases of actuating motor, realize reduced voltage starting.
2, according to the described squirrel-cage motor liquid variable resistance voltage reducing starter of claim 1, it is characterized in that said movable plate electrode mechanical driving device realized by following mode: have by actuating motor, belt transmission and rolling bearing at the cabinet upper screw rod, screw mandrel is provided with screw, places three movable plate electrodes in three case chambeies of resistance box to be connected by insulating bar and screw machinery.
3, according to the described squirrel-cage motor liquid variable resistance voltage reducing starter of claim 1, it is characterized in that said movable plate electrode mechanical driving device also can be realized by following mode: actuating motor and mechanical reducer are connected, and mechanical reducer output shaft and screw mandrel machinery are connected again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95211953 CN2238505Y (en) | 1995-05-23 | 1995-05-23 | Liquid variable resistance voltage reducing starter for squirrel-cage motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95211953 CN2238505Y (en) | 1995-05-23 | 1995-05-23 | Liquid variable resistance voltage reducing starter for squirrel-cage motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2238505Y true CN2238505Y (en) | 1996-10-23 |
Family
ID=33862286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95211953 Expired - Fee Related CN2238505Y (en) | 1995-05-23 | 1995-05-23 | Liquid variable resistance voltage reducing starter for squirrel-cage motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2238505Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397771C (en) * | 2005-12-05 | 2008-06-25 | 何起军 | Starting speed regulator of liquid resistance in use for squirrel cage motor |
| CN105827156A (en) * | 2015-01-05 | 2016-08-03 | 刘伟 | Variable resistor and cluster thereof, and motor starter |
-
1995
- 1995-05-23 CN CN 95211953 patent/CN2238505Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397771C (en) * | 2005-12-05 | 2008-06-25 | 何起军 | Starting speed regulator of liquid resistance in use for squirrel cage motor |
| CN105827156A (en) * | 2015-01-05 | 2016-08-03 | 刘伟 | Variable resistor and cluster thereof, and motor starter |
| CN105827156B (en) * | 2015-01-05 | 2019-01-04 | 嵊州市鑫聚源厨具有限公司 | A kind of variable resistance and its cluster, motor starter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |