CN201467040U - Auto-coupling voltage-reduction starting control device - Google Patents
Auto-coupling voltage-reduction starting control device Download PDFInfo
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- CN201467040U CN201467040U CN2009200906379U CN200920090637U CN201467040U CN 201467040 U CN201467040 U CN 201467040U CN 2009200906379 U CN2009200906379 U CN 2009200906379U CN 200920090637 U CN200920090637 U CN 200920090637U CN 201467040 U CN201467040 U CN 201467040U
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- contactor
- normally opened
- opened contact
- auxiliary relay
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Abstract
The utility model discloses an auto-coupling voltage-reduction starting control device, comprising a control circuit arranged in a control cabinet and an auto-coupling transformer QZB, wherein, the control circuit is connected between L1-N of 220v alternating current power supplies in the control cabinet; a current time conversion device ST is connected in a normally opened contact circuit of a contactor KM2 which controls the work of the auto-coupling transformer QZB in the control circuit in series; a make time delay closing button of the current time conversion device ST is connected with coils of an intermediate relay KA3 in series and then is connected with the current time conversion device ST in parallel; and the contactor KM1 is arranged between a midpoint tap of a motor three-phase power supply and the auto-coupling transformer. The utility model has the characteristics of simple structure, low cost and practicability and the like.
Description
Technical field
The utility model relates to a kind of reduced-voltage starting device, relates to need to realize a kind of self coupling reduced-voltage starting control device of reduced-voltage starting motor more specifically.
Background technology
When the starting load of motor was very big, starting current must adopt the mode of step-down to start to the intense impact of electrical network and contiguous electric equipment when overload when preventing motor start-up and motor full voltage starting; At present the mode of reduced-voltage starting commonly used is: star is capable-and capable reduced-voltage starting of triangle or autotransformer reduced-voltage starting.Above-mentioned two kinds of Starting mode all are to adopt the time relay that motor is switched to the total head normal operating condition from the reduced-voltage starting state, when time relay or circuit switched break down can not finish the motor switch operating in the limited time time, motor then is in long low-voltage, the big current work process, is easy to occur the phenomenon of being burnt; Existing in addition autotransformer is controlled its zero point by contactor, make the autotransformer can not be fully after motor control system enters the full speed running state and isolated from power like this, increased the inductance composition in the control system and increased the loss of electric energy in autotransformer accordingly.
Summary of the invention
In order to overcome the existing time relay deficiency of switching motor running status and existing autotransformer loss electric energy fast and effectively, the purpose of this utility model is to propose a kind of self coupling reduced-voltage starting control device, described self coupling reduced-voltage starting control device has realized that autotransformer fully isolates with power supply after motor control system enters the full speed running state, reduced the loss of autotransformer body, prolonged the life-span of autotransformer, reduced the perceptual composition in the electrical network, improved the power factor of electrical network, the utlity model has simple in structure, with low cost, characteristics such as practicality.
For achieving the above object, the utility model adopts following technical scheme:
A kind of self coupling reduced-voltage starting control device comprises the control circuit and the autotransformer QZB that are arranged in the control cubicle; Control circuit is connected in the control cubicle between the 220V AC power L1-N, series current time conversion equipment ST in the normally opened contact loop of the contactor KM2 of control autotransformer QZB work in the control circuit, parallel-current time conversion equipment ST after the closed knob of the make delay of current time conversion equipment ST is connected with auxiliary relay KA3 coil; Contactor KM1 is arranged between the centre tap of motor three phase mains and autotransformer QZB.
Described self coupling reduced-voltage starting control device, the power supply indicator KR to N that connects behind the 220V AC power L1 termination power QF1 normally opened contact in the control cubicle holds; Series contactor KM2 normally opened contact, indicator light KY to N hold behind the L1 termination power QF1 normally opened contact; Series contactor KM3 normally opened contact, indicator light KG to N hold behind the L1 termination power QF1 normally opened contact; Series connection button SB, selector switch SA behind the L1 termination power QF1 normally opened contact, moving disconnected button SB1, making button SB2, auxiliary relay KA4 coil are held to N, auxiliary relay KA4 normally opened contact making button SB2 in parallel, auxiliary relay KA1 normally opened contact selector switch SA in parallel, moving disconnected button SB1, making button SB2; Series connection button SB behind the L1 termination power QF1 normally opened contact, auxiliary relay KA1 normally opened contact, fuse FR normally-closed contact, contactor KM3 normally-closed contact, auxiliary relay KA3 normally-closed contact, contactor KM1 coil hold to N, contactor KM1 normally opened contact, contactor KM2 coils from parallel connection of coils auxiliary relay KA3 normally-closed contact, contactor KM1 coil, contactor KM2 normally opened contact contactor KM1 in parallel normally opened contact; FR, KM3 node series contactor KM2 normally opened contact, current time conversion equipment ST to N hold, current time conversion equipment ST make delay close push button, auxiliary relay KA3 coil series connection back parallel-current time conversion equipment ST, auxiliary relay KA3 normally opened contact parallel-current time conversion equipment ST make delay close push button; FR, KM3 node series connection auxiliary relay KA3 normally opened contact, contactor KM1 normally-closed contact, contactor KM3 coil are held contactor KM3 normally opened contact auxiliary relay KA3 in parallel normally opened contact to N.
Owing to used technique scheme, the beneficial effects of the utility model are:
The utility model has effectively been realized the operating state conversion of motor control system by the current time conversion equipment is set; By contactor KM1 being arranged between the centre tap of motor three phase mains and autotransformer, realized that autotransformer fully isolates with power supply after motor control system enters the full speed running state, reduced the autotransformer body loss, prolonged life-span of autotransformer, reduce the perceptual composition in the electrical network, improved the power factor of electrical network; The utlity model has simple in structure, with low cost, advantage such as enhance productivity.
Description of drawings
Fig. 1 is a main circuit part of the present utility model;
Fig. 2 is a control circuit part of the present utility model.
Embodiment
Open the purpose of this utility model is intended to protect all changes and improvements in the utility model scope, and the utility model is not limited to following examples;
Below in conjunction with accompanying drawing the utility model is further specified:
In Fig. 1,2: a kind of self coupling reduced-voltage starting control device comprises the control circuit and the autotransformer QZB that are arranged in the control cubicle; Control circuit is connected in the control cubicle between the 220V AC power L1-N, in the control cubicle behind the 220V AC power L1 termination power QF1 normally opened contact series connection power supply indicator KR to N hold; Series contactor KM2 normally opened contact, indicator light KY to N hold behind the L1 termination power QF1 normally opened contact; Series contactor KM3 normally opened contact, indicator light KG to N hold behind the L1 termination power QF1 normally opened contact; Series connection button SB, selector switch SA behind the L1 termination power QF1 normally opened contact, moving disconnected button SB1, making button SB2, auxiliary relay KA4 coil are held to N, auxiliary relay KA4 normally opened contact making button SB2 in parallel, auxiliary relay KA1 normally opened contact selector switch SA in parallel, moving disconnected button SB1, making button SB2; Series connection button SB behind the L1 termination power QF1 normally opened contact, auxiliary relay KA1 normally opened contact, fuse FR normally-closed contact, contactor KM3 normally-closed contact, auxiliary relay KA3 normally-closed contact, contactor KM1 coil hold to N, contactor KM1 normally opened contact, contactor KM2 coils from parallel connection of coils auxiliary relay KA3 normally-closed contact, contactor KM1, contactor KM2 normally opened contact contactor KM1 in parallel normally opened contact; FR, KM3 node series contactor KM2 normally opened contact, current time conversion equipment ST to N hold, current time conversion equipment ST make delay close push button, auxiliary relay KA3 coil series connection back parallel-current time conversion equipment ST, auxiliary relay KA3 normally opened contact parallel-current time conversion equipment ST make delay close push button; FR, KM3 node series connection auxiliary relay KA3 normally opened contact, contactor KM1 normally-closed contact, contactor KM3 coil are held contactor KM3 normally opened contact auxiliary relay KA3 in parallel normally opened contact to N; Contactor KM1 is arranged between the centre tap of motor three phase mains and self coupling reducing transformer QZB, make self coupling reducing transformer QZB complete and isolated from power after electric machine control system enters the full speed running state, reduced the inductance composition in the control system effectively, reduce the loss of electric energy in autotransformer QZB, improved the power factor of electrical network.
Energized QF1, selector switch SA beats at the manual work state, power supply indicator KR is bright, press and close the charged adhesive of auxiliary relay KA4 coil behind the button SB2, the closed self-insurance of auxiliary relay KA4 normally opened contact, the charged adhesive of contactor KM1 coil simultaneously, the charged adhesive of contactor KM1 normally opened contact closed-loop path general rule contactor KM2 coil, contactor KM1, contactor KM2 main contacts closure in the main circuit, electric machine control system enters the self coupling reduced-voltage starting stage; The logical power supply stream enabling signal of giving in contactor KM2 normally opened contact closed-loop path, current time conversion equipment ST make delay close push button closure when detecting the current value of setting, auxiliary relay KA3 coil gets electric adhesive, the normally-closed contact of auxiliary relay KA3 disconnects the power supply of contactor KM1 and contactor KM2, the main contacts of contactor KM1 and contactor KM2 disconnects in the main circuit, contactor KM3 main contacts closure, electric machine control system withdraws from self coupling reduced-voltage starting state, enters total head full speed running state; Can more effectively switch to the full speed running state in the time of setting or after in the electric motor starting process, reaching rated current by the current time conversion equipment at once.
TA1 and TA2 instrument transformer are gathered the main circuit current signal, in the self coupling reduced-voltage starting stage, in the major loop, the normally-closed contact closure of contactor KM3, the normally-closed contact of contactor KM1 disconnects, starting current passes through from the normally-closed contact of contactor KM3, makes the fuse FR in the circuit be in the short circuit state by less current, prevents that fuse is in the stage misoperation of self coupling reduced-voltage starting; In the control circuit, starting current enters 3 and 4 contacts of current time conversion equipment ST, current time conversion equipment ST action when detecting the current value of setting, and control circuit cuts off the power supply of contactor KM1 and KM2, connect contactor KM3 power supply, motor enters the full speed running state; Make control system withdraw from the self coupling reduced-voltage starting stage with current signal and enter the full speed running stage.The loss that can reduce the transformer body by this scheme has prolonged transformer's life span, and the perceptual composition in the electrical network is reduced, and has improved the power factor of electrical network, has reduced reactive loss.
The utility model is equally applicable to the self coupling reduced-voltage starting control in the equipment such as large fan, pump class.
Claims (2)
1. a self coupling reduced-voltage starting control device comprises the control circuit and the autotransformer QZB that are arranged in the control cubicle, it is characterized in that; Described control circuit is connected in the control cubicle between the 220V AC power L1-N, series current time conversion equipment ST in the normally opened contact loop of the contactor KM2 of control autotransformer QZB work in the control circuit, parallel-current time conversion equipment ST after the closed knob of the make delay of current time conversion equipment ST is connected with auxiliary relay KA3 coil; Contactor KM1 is arranged between the centre tap of motor three phase mains and autotransformer QZB.
2. self coupling reduced-voltage starting control device according to claim 1 is characterized in that; The power supply indicator KR to N that connects behind the 220V AC power L1 termination power QF1 normally opened contact in the control cubicle holds; Series contactor KM2 normally opened contact, indicator light KY to N hold behind the L1 termination power QF1 normally opened contact; Series contactor KM3 normally opened contact, indicator light KG to N hold behind the L1 termination power QF1 normally opened contact; Series connection button SB, selector switch SA behind the L1 termination power QF1 normally opened contact, moving disconnected button SB1, making button SB2, auxiliary relay KA4 coil are held to N, auxiliary relay KA4 normally opened contact making button SB2 in parallel, auxiliary relay KA1 normally opened contact selector switch SA in parallel, moving disconnected button SB1, making button SB2; Series connection button SB behind the L1 termination power QF1 normally opened contact, auxiliary relay KA1 normally opened contact, fuse FR normally-closed contact, contactor KM3 normally-closed contact, auxiliary relay KA3 normally-closed contact, contactor KM1 coil hold to N, contactor KM1 normally opened contact, contactor KM2 coils from parallel connection of coils auxiliary relay KA3 normally-closed contact, contactor KM1 coil, contactor KM2 normally opened contact contactor KM1 in parallel normally opened contact; FR, KM3 node series contactor KM2 normally opened contact, current time conversion equipment ST to N hold, current time conversion equipment ST make delay close push button, auxiliary relay KA3 coil series connection back parallel-current time conversion equipment ST, auxiliary relay KA3 normally opened contact parallel-current time conversion equipment ST make delay close push button; FR, KM3 node series connection auxiliary relay KA3 normally opened contact, contactor KM1 normally-closed contact, contactor KM3 coil are held contactor KM3 normally opened contact auxiliary relay KA3 in parallel normally opened contact to N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200906379U CN201467040U (en) | 2009-06-03 | 2009-06-03 | Auto-coupling voltage-reduction starting control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200906379U CN201467040U (en) | 2009-06-03 | 2009-06-03 | Auto-coupling voltage-reduction starting control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201467040U true CN201467040U (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200906379U Expired - Fee Related CN201467040U (en) | 2009-06-03 | 2009-06-03 | Auto-coupling voltage-reduction starting control device |
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| Country | Link |
|---|---|
| CN (1) | CN201467040U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480255A (en) * | 2010-11-29 | 2012-05-30 | 蓝星化工新材料股份有限公司广西分公司 | Method and device for controlling multiple motors by one soft starter |
| CN111371344A (en) * | 2020-03-13 | 2020-07-03 | 上海外高桥造船有限公司 | Starting circuit for autotransformer of three-phase motor |
-
2009
- 2009-06-03 CN CN2009200906379U patent/CN201467040U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480255A (en) * | 2010-11-29 | 2012-05-30 | 蓝星化工新材料股份有限公司广西分公司 | Method and device for controlling multiple motors by one soft starter |
| CN111371344A (en) * | 2020-03-13 | 2020-07-03 | 上海外高桥造船有限公司 | Starting circuit for autotransformer of three-phase motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20140603 |