CN2596664Y - Novel soft startor without harmonic wave - Google Patents
Novel soft startor without harmonic wave Download PDFInfo
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- CN2596664Y CN2596664Y CN 03211259 CN03211259U CN2596664Y CN 2596664 Y CN2596664 Y CN 2596664Y CN 03211259 CN03211259 CN 03211259 CN 03211259 U CN03211259 U CN 03211259U CN 2596664 Y CN2596664 Y CN 2596664Y
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- switching
- self
- motor
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Abstract
The utility model discloses a new soft starter without harmonic enhancing the reliability and the response speed of the work of systems. The utility model can adjust voltage exerted on a motor by appropriately adjusting the duty cycle of the trigger pulse of a switching device and complete the function realized by adjusting the trigger angle of a thyristor in a thyristor voltage adjusting structure. The utility model has the advantages of fast response speed, not low order harmonic and no need of filter. The utility model is characterized in that a circuit composed of a self shutoff switch S#-[1-6], a diode D#-[1-6], a capacitor C#-[1-3] and a resistor R#-[1-3] which are connected in parallel is connected among stator windings of each phases of the motor and corresponding phase wires of a power supply in series, and the self shutoff switch S is connected with control signals which are used for correspondingly adjusting the duty cycle of trigger pulse of the switching device.
Description
Technical field
The utility model belongs to a kind of starting device of motor.
Background technology
Present soft starter device all is based on the topological structure of thyristor, as shown in Figure 1.Because thyristor T
1-6Be half control type device, therefore cause the interrupted of electric current.Particularly when the thyristor trigger angle is big, a large amount of low-order harmonic of its generation will inject electrical network.It is particularly outstanding that this phenomenon seems in the starting process of large-size machine, its harmonic wave for electrical network cause to influence meeting bigger.For within the acceptable range with harmonics limiting, need the extra filter of increase, this will increase the cost of equipment.From the control aspect,, therefore when control, must in time follow the tracks of the variation of its angle of flow, otherwise will cause losing of trigger impulse, severe patient can make system out of control greater than 180 degree owing to the angle of flow because thyristor is a half control.In addition, dynamic responding speed also is the inherent shortcoming of its existence slowly.
Technical scheme
The utility model purpose is to disclose a kind of novel no harmonic wave soft starter, has designed a kind of novel circuit structure.The harmonic wave that overcomes existing soft starter existence is big, control is unreliable, response speed waits shortcoming slowly, improves the reliability and the response speed of system works.Adopt self-turn-off device to replace traditional thyristor in the main circuit.The duty ratio of the trigger impulse by suitably adjusting switching device just can be adjusted the voltage that is applied on the motor, finishes in the thyristor voltage regulation structure by adjusting the function that the thyristor trigger angle realizes.When the duty ratio of the trigger impulse of switching device is 1, voltage on line side will be applied on the motor fully; When being zero, duty ratio then can cut off the electricity supply.In new circuit structure, synchronous because the triggering of switching device does not need with system voltage, therefore control is convenient, reliability is high; And since switching frequency much larger than system frequency, so response speed is fast, and does not produce low-order harmonic, need not additionally to install additional filter.
The utility model is characterized in that being in series with following circuit, a self-on-off switching S between the corresponding phase line of the every phase stator winding of motor and power supply
1-3With diode D
1-3Inverse parallel connects power supply, forms access point 1,4 and 7, leading point 2,5 and 8, another self-on-off switching S
4-6With diode D
4-6Inverse parallel connects node 2,5 and 8, and its leading point is a node 3,6 and 9; Capacitor C
1-3With resistance R
1-3Parallel connection is connected between node 1,4,7 and 3,6,9; Node 2,5 and 8 inserts motor M
2Corresponding every phase stator winding L
4-6Each phase node 3,6,9 is connected to a bit.Self-on-off switching S connects the control signal of corresponding adjustment switching device trigger impulse duty ratio.Described self-on-off switching S
A, S
BCan be: gate level turn-off thyristor, field of electric force effect transistor, igbt etc.
Description of drawings
Fig. 1 is the circuit structure diagram of existing soft initiator;
Fig. 2 is one of the utility model embodiment soft start topological diagram;
Fig. 3 is two of the utility model embodiment soft start topological diagram;
Fig. 4 is three of the utility model embodiment soft start topological diagram;
Fig. 5 is four of the utility model embodiment soft start topological diagram;
Fig. 6 is one of the utility model embodiment soft start main circuit operating state;
Fig. 7 is two of the utility model embodiment soft start main circuit operating state;
Fig. 8 is three of the utility model embodiment soft start main circuit operating state;
Embodiment
As shown in Figure 2, the duty ratio by control self-on-off switching device periodically is switched on or switched off motor with the three-phase alternating current system.Switching device S
1, S
2, S
3It is the main devices that connects motor and electrical network.And S
4, S
5, S
6Then be when main switching device turn-offs, to play the afterflow effect.For to prevent that two switching devices on the same arm are short-circuited, must keep certain Dead Time simultaneously.Three electric capacity then are to be used for forming bypass at Dead Time, and guaranteeing can damaging crossover conduction and puncture between the two groups of switches in front and back.Three resistance then are to provide discharge channel for shunt capacitance.In each cycle of operation of switching device, three kinds of different operating states will be arranged like this.
(1) main switch opening state
Main switch S in this state
1, S
2, S
3Be switched on, auxiliary switch turn-offs, and line voltage and electric current just impose on motor by the switch of one or two fronts and the inner counter paralleling switch diode of two or one fronts.As shown in Figure 6.
(2) dead band state
All be in off state at this devices switch pipe, at this moment line voltage be applied on the stator winding of motor, keep the continuous of current of electric by shunt capacitance.And energy stored will absorb by resistance in shunt capacitance.Its operating state as shown in Figure 7.
(3) auxiliary switch opening state
Under this state, motor and electrical network disconnect, and the voltage of input this moment is zero, but owing to electric current in the stator winding then continues circulation by the switch of one or two back and the inside paralleling switch diode of two or one back.Its state as shown in Figure 8.
If consider the whole system of soft equipment and motor, then in the starting and running of motor, three facies models and null mode two kinds of mode of operations alternately appear all the time:.Three facies models are equivalent to soft starter and are operated in that main switch is opened or bypass condition, and the three-phase voltage of electrical network is applied on the stator winding of motor during this period.When null mode, line voltage and motor disconnect, and promptly soft is operated in the auxiliary switch opening state, are the no-voltage input.
Fig. 3,4,5 is three kinds of Extended forms of circuit among Fig. 2.In these three kinds of Extended forms, the operation principle of circuit is identical with the operation principle of circuit among Fig. 2, promptly works under three kinds of operational modes shown in Fig. 6-8.
As described in Figure 3, with self-on-off switching S, anti-and connect A phase power supply with diode D, access point is defined as node 10, and the leading point is defined as node 11; With self-on-off switching S
10With and utmost point pipe D
10Inverse parallel connects node 11, and the leading point is defined as node 12; With capacitor C
4Be connected in parallel between node 10 and 12; Draw a line from node 11 and insert motor M
3A phase winding L
7The B group is done be connected mutually identical with A mutually with C.At last, with A phase node 12 and B mutually node 15 and C phase node 18 link together, through resistance R
4Insert the neutral point of motor stator winding.
As shown in Figure 4, with self-on-off switching S
13With diode D
13Inverse parallel connects A phase power supply, and incoming end is defined as node 19 exits and is defined as node 20, connects motor M
4A phase stator winding; BC is done mutually identical connection with A mutually, and exit is defined as node 22 and 24 respectively, and the B that inserts motor respectively mutually with C stator winding mutually.With capacitor C
7With resistance R
5Be connected to node 19 after the parallel connection, the leading point is defined as node 30; BC is done the connection mutually identical with A mutually, and exit is defined as node 31 and 32 respectively.With self-on-off switching S
16With diode D
22Inverse parallel, an end is defined as node 25, and the other end is defined as node 29; With diode D
16With D
19Series connection, D
17With D
20Series connection, D
18With D
21Series connection is between the access node 25 in parallel then and 29; With node 24 and D
16And D
19Tie point 26 link to each other, with node 22 and D
17And D
20Tie point 27 link to each other, with node 20 and D
18And D
21Tie point 28 link to each other; At last, with node 30,31 and 32 common access nodes 29.
As shown in Figure 5, with self-on-off switching S
17With diode D
23Inverse parallel connects A phase power supply, and incoming end is defined as node 33, and exit is defined as node 34, connects motor M
5A phase stator winding.With capacitor C
10Be connected to node 33, the leading point is defined as node 44; BC is done the connection mutually identical with A mutually, and exit is defined as node 45 and 46 respectively.With self-on-off switching S
20With diode D
32Inverse parallel, an end is defined as node 39, and the other end is defined as node 43; With diode D
26With D
29Series connection, D
27With D
30Series connection, D
28With D
31Series connection is between the access node 39 in parallel then and 43; With node 38 and D
26And D
29Tie point 40 link to each other; With node 44 45 and 46 common access nodes 43; At last, with node 34 through resistance R
8Insert motor M
5The neutral point of stator winding.
Compare with present soft initiator, novel soft device circuit can produce following positive role: a triggering because of switching device does not need with main circuit synchronous, the therefore easy realization of control, system reliability height; Two since switching frequency much larger than the frequency of main circuit, so do not produce low-order harmonic, this is for harmonic carcellation and to obtain good energy-saving effect be crucial; Three owing to adopted self-turn-off device, so switch can repeatedly turn on and off in a system cycle, so response speed improves greatly.
Claims (1)
1. novel no harmonic wave soft starter is characterized in that being in series with following circuit, a self-on-off switching S between the corresponding phase line of the every phase stator winding of motor and power supply
1-3With diode D
1-3Inverse parallel connects power supply, forms access point 1,4 and 7, leading point 2,5 and 8, another self-on-off switching S
4-6With diode D
4-6Inverse parallel connects node 2,5 and 8, and its leading point is a node 3,6 and 9; Capacitor C
1-3With resistance R
1-3Parallel connection is connected between node 1,4,7 and 3,6,9; Node 2,5 and 8 inserts motor M
2Corresponding every phase stator winding L
4-6, each phase node 3,6,9 is connected to a bit, self-on-off switching S meets the control signal of corresponding adjustment switching device trigger impulse duty ratio, described self-on-off switching S
A, S
BCan be: gate level turn-off thyristor, field of electric force effect transistor, igbt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03211259 CN2596664Y (en) | 2003-01-29 | 2003-01-29 | Novel soft startor without harmonic wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03211259 CN2596664Y (en) | 2003-01-29 | 2003-01-29 | Novel soft startor without harmonic wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2596664Y true CN2596664Y (en) | 2003-12-31 |
Family
ID=33754314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03211259 Expired - Lifetime CN2596664Y (en) | 2003-01-29 | 2003-01-29 | Novel soft startor without harmonic wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2596664Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185543A (en) * | 2010-07-15 | 2011-09-14 | 上海海洋大学 | Energy-saving soft-start device for high-voltage asynchronous motor |
| CN108988295A (en) * | 2018-08-17 | 2018-12-11 | 中车永济电机有限公司 | It is quick break protective device in permanent magnet direct-drive system using one kind that IGBT is realized |
-
2003
- 2003-01-29 CN CN 03211259 patent/CN2596664Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185543A (en) * | 2010-07-15 | 2011-09-14 | 上海海洋大学 | Energy-saving soft-start device for high-voltage asynchronous motor |
| CN102185543B (en) * | 2010-07-15 | 2014-04-30 | 上海海事大学 | Energy-saving soft-start device for high-voltage asynchronous motor |
| CN108988295A (en) * | 2018-08-17 | 2018-12-11 | 中车永济电机有限公司 | It is quick break protective device in permanent magnet direct-drive system using one kind that IGBT is realized |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HARBIN WEIHAN POWER CONTROL TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: JI YANCHAO Effective date: 20060310 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20060310 Address after: 602 room 150001, science and Technology Park, Harbin Institute of Technology, Heilongjiang, Harbin Patentee after: Harbin Han Wei Electric Energy Control Technology Co., Ltd. Address before: 602 room 150001, science and Technology Park, Harbin Institute of Technology, Heilongjiang, Harbin Patentee before: Ji Yanchao |
|
| ASS | Succession or assignment of patent right |
Owner name: HAERBIN WEIHAN ELECTRICAL APPLIANCE EQUIPMENT CO. Free format text: FORMER OWNER: HARBIN WEIHAN POWER CONTROL TECHNOLOGY CO., LTD. Effective date: 20081114 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081114 Address after: Dalian District of Bohai Road southwest, concentrated in Heilongjiang Harbin Development Zone haping road zip code: 150060 Patentee after: Harbin Weihan Electric Equipment Co., Ltd. Address before: Room 602, science and Technology Park, Harbin Institute of Technology, Heilongjiang, Harbin 150001, China Patentee before: Harbin Han Wei Electric Energy Control Technology Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130129 Granted publication date: 20031231 |