CN201789465U - Safe and reliable direct-current motor armature winding traction brake changeover device - Google Patents
Safe and reliable direct-current motor armature winding traction brake changeover device Download PDFInfo
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- CN201789465U CN201789465U CN2010201845356U CN201020184535U CN201789465U CN 201789465 U CN201789465 U CN 201789465U CN 2010201845356 U CN2010201845356 U CN 2010201845356U CN 201020184535 U CN201020184535 U CN 201020184535U CN 201789465 U CN201789465 U CN 201789465U
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Abstract
A safe and reliable direct-current excitation motor armature winding traction brake changeover device is characterized in that reversing switches KA1, KA2, KB1 and KB2 are respectively arranged at two ends of a direct-current motor armature winding M in a traction circuit, the reversing switch KA1 or KB2 is connected to one end of the armature winding M, the reversing switch KA2 or KB1 is connected to the other end of the armature winding M, the reversing switch KA1 is connected with the reversing switch KB1, the reversing switches KA2 and KB2 are connected mutually and then connected with an anode of a diode D1, a positive electrode of a filter capacitor C0, the end of the direct-current motor armature winding M provided with the reversing switch KA1 or KB1, a cathode of the diode D3 and a C-electrode of an IGBT are connected to a common point, and an E-electrode of the IGBT, a cathode of the diode D1 and a stator winding F are connected to a common point. The brake changeover device has reasonable design of circuit connection, adopts reasonable matching between the IGBT, the diode D1 and the capacitor C0, and can not only thoroughly eliminate arc generated between contacts when in brake and reduce maintenance workload, but effectively prevent short circuit of the armature winding when in brake and increase service reliability.
Description
Technical field
The utility model relates to a kind of improved Electric direct current machine chopper speed regulating device, the conversion equipment that particularly a kind of safe and reliable direct current machine armature winding drags and brakes.
Background technology
Direct current machine is widely used in industrial and mining enterprises and transportation department, as the direct current machine of traction urban light rail, trackless, tramcar and traction mine, factory's electric locomotive etc.When motor need slow down, adopt braking contactor to carry out dynamic braking or regenerative braking usually.Because the moving probe of contactor belt current break-make of work schedule makes the very fast ablation of contact, so must often change, this has not only increased the workload of repairing, and has reduced the reliability of equipment.
The inventor was once many according to cost height, the fault that Electric tradition DC motor speed-regulating exists, maintenance is difficult, and braking effect is poor, easily causes problems such as traffic safety hidden danger, designs Electric direct current machine chopper speed regulating device in succession.Wherein notification number is " the direct current machine chopper speed regulating device " of 2285031Y, though have two kinds of functions of regenerative braking and dynamic braking simultaneously, but power supply E0 by inductance L directly with after capacitor C, diode D3 and contactor JC1 etc. are connected, be connected with armature winding M with JC2 again, when JC1 disconnects, capacitor C and diode D3 are charged, and maintenance activity is very dangerous.When JC2 adhesive or disconnection, all there is electric current to pass through, influence the useful life of its contact.
Notification number be 2560161Y's " energy-saving direct current machine chopper speed regulator ", adopt IGBT (commercially available insulated gate formula bipolar transistor module) to simplify the structure of speed regulator, although its good speed adjustment features, braking contactor is the double-contact structure, but the electric current disjunction is finished by two contacts of braking contactor, does not thoroughly solve the problem in useful life of contact.Behind power supply, be provided with K1 and replaced JC1 in " the direct current machine chopper speed regulating device " that notification number is 2285031Y, solved when JC1 disconnects, capacitor C and diode D3 are charged, the very unsafe problem of maintenance activity., notification number is that 2607696Y's " safe and reliable direct current machine chopper speed regulator " and notification number is 2730026Y " the direct current machine chopper speed regulator of regenerative braking ", because when contactor Z1 disconnects, electric current is still arranged by producing electric arc, therefore influence the useful life of its contact.
In addition, also disclosing improved relevant patent on the inventor's patented technology basis in the patent documentation, is " the direct current machine feeding braking device " of CN201118496Y and " solid-state switch that is used for the electric car direct current circuit " that notification number is CN201142673Y as notification number.The structure of the former patent circuit and the inventor's " direct current machine chopper speed regulating device " are duplicate, only resistance R 1 resistance has been become 0, resistance R 2 resistances have become infinity, the input inductance quantitative change becomes 0, and power supply E0 is drawn as a kind of storage battery E of power supply.Therefore it also exists above-mentioned power supply E0 directly directly to be connected charged defective with capacitor C, diode D3 and contactor JC1 etc.And latter's patent can't be implemented at all, the two ends of its direct current machine (or charger) connect switch RC1 and RC2, FC1 and the FC2 of Control current both forward and reverse directions, RC1, RC2 and FC1, FC2 must have one group of closure during work, the tie point design of electronic switch Z is unreasonable, directly by reversing switch and at motor (or charger) two ends, under the situation that electricity is arranged, with motor (or charger) direct short-circuit, must cause serious consequences such as motor (or charger) burns, electronic switch Z burns when electronic switch Z is closed.
The utility model content
The purpose of this utility model provides a kind of reliable DC series armature winding dragging and braking conversion device, fundamentally solved the problem of the pitting of contact of existing braking contactor existence, its circuit connects reasonable in design, adopt the reasonably combined of IGBT1 and diode D1 and capacitor C 0, replace existing braking contactor, the arc erosion that produces between contact in the time of can thoroughly eliminating its braking, reduced maintenance workload, cause the armature winding short circuit in the time of simultaneously preventing to brake effectively again, improve the reliability of using.
The technical scheme that the utility model adopted is: this reliable DC series armature winding dragging and braking conversion device comprises pulliung circuit and braking circuit, its technical essential is: the two ends of the direct current machine armature winding M in the described pulliung circuit are provided with reversing switch KA1 respectively, KA2, KB1 and KB2, described reversing switch KA1 or KB2 connect the end of described armature winding M, described reversing switch KA2 or KB1 connect the other end of described armature winding M, described reversing switch KA1 is connected with KB1, described reversing switch KA2 is connected with KB2 and is connected with the anode of diode D1, make described filter capacitor C0+utmost point, an end that has the direct current machine armature winding M of described reversing switch KA1 or KB1, the C utmost point of the negative electrode of diode D3 and IGBT1 is connected to a common point, and the E utmost point of described IGBT1 and the negative electrode of diode D1 and stator winding F are connected to a common point.
Advantage and the good effect that the utlity model has are: the utility model is only controlled the direct current machine armature winding M that has reversing switch in the pulliung circuit, rather than controls whole direct current machine.Armature winding M and diode D1 series connection back are in parallel with control switch IGBT1, cause armature M short circuit when preventing to brake.In braking circuit, adopt commercially available insulated gate formula bipolar transistor module IGBT1 to replace existing braking contactor, guarantee no longer to take place the problem of the electric arc that braking contactor produces when open and close, thereby reduced maintenance workload.The negative electrode of diode D3 and the C utmost point of IGBT1 are connected to a common point; filter capacitor C0+extremely directly receive the end of the direct current machine armature winding M that has described reversing switch KA1 or KB1; filter capacitor C0-utmost point is connected with the anode of diode D2, the E utmost point of IGBT2; adopt above-mentioned IGBT1 to be connected design with the reasonably combined circuit of diode D1 and capacitor C 0; not only IGBT1, IGBT2 are played protective effect, and improved the reliability that drags, brakes conversion.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is a kind of concrete structure schematic diagram of the present utility model.
Sequence number explanation among the figure: Q1, Q2 draw contactor, the F stator winding, M direct current machine armature winding, H current measuring element, IGBT1, IGBT2 (commercially available insulated gate formula bipolar transistor module), D1, D2, D3 diode, KA1, KA 2, KB1, KB2 reversing switch, C0 filter capacitor, R1, R2 resistance.
Embodiment
Describe concrete structure of the present utility model in detail according to Fig. 1.This safe and reliable dragging and braking conversion device for DC motor armature winding comprises pulliung circuit and braking circuit.Wherein pulliung circuit comprises: traction contactor Q1, Q2, stator winding F, direct current machine armature winding M, current measuring element H, commercially available insulated gate formula bipolar transistor module IGBT2, diode D1, D3, reversing switch KA1, KA2, KB1, KB2, parts such as filter capacitor C0.Braking circuit comprises: stator winding F, direct current machine armature winding M, current measuring element H, commercially available insulated gate formula bipolar transistor module IGBT1, IGBT2, diode D1, D2, D3, reversing switch KA1, KA 2, KB1, KB2, filter capacitor C0, parts such as resistance R 1, R2.
The concrete structure of this device is as follows: the power supply in the pulliung circuit+utmost point ,-utmost point respectively by traction contactor Q1 or Q2 connect filter capacitor C0+utmost point ,-utmost point.Two ends at direct current machine armature winding M are provided with reversing switch KA1, KA2, KB1 and KB2 respectively, and make filter capacitor C0+utmost point, an end that has the direct current machine armature winding M of reversing switch KA1 or KB1, the negative electrode of diode D3 and the C utmost point of IGBT1 be connected to a common point.The E utmost point of IGBT1 and the negative electrode of diode D1 and stator winding F are connected to a common point.Filter capacitor C0-anode of the utmost point and diode D2, the E of IGBT2 extremely link to each other, the negative electrode of diode D2 links to each other with the intermediate contact of resistance R 1 and R2, and the R1 other end is connected with the end of the direct current machine armature winding M that has reversing switch KA2 or KB2.
During this device operation, under traction state, electric current from power supply+utmost point, by traction contactor Q1, reversing switch KA1 or KB1, direct current machine armature winding M, reversing switch KA2 or KB2, diode D1, stator winding F, current measuring element H, IGBT2, again by traction contactor Q2 flow back into power supply-utmost point, conduction ratio by control IGBT2, just can control flows cross the average current size of DC series motor, and then control rotating speed of motor.Filter capacitor C0 plays the effect of filtering, and the D3 diode provides continuous current circuit for motor.
Under on-position, because promoting direct current machine armature winding M, external force rotates, electric power generation, the IGBT1 conducting, the B point electromotive force of armature M is higher than A point electromotive force, and through reversing switch KA1 or KB1, electric current flows to the E utmost point from the IGBT1C utmost point to electric current from the B point.Because the effect of diode D1, the electric current that armature M generating produces can only one the tunnel through stator winding F, current measuring element H, resistance R 2, R1, reversing switch KA2 or KB2, flow back into the A point of direct current machine armature winding M.Another road: the B point electromotive force of armature M is higher than A point electromotive force, and electric current passes through reversing switch KA1 or KB1 from the B point, the IGBT1 conducting, and electric current flows to the E utmost point from the C utmost point.Because the effect of diode D1, the electric current that armature M generating produces flow back into the A point of direct current machine armature winding M through stator winding F, current measuring element H, IGBT2, D2, resistance R 1, reversing switch KA2 or KB2.By the conduction ratio of control IGBT2, just can control flows cross the size of this loop average current, reach purpose at this circuit controls brake circuit electric current.
Being connected of contactor Q1, Q2 control connection or disjunction power supply and governing system.When needs motor outputting power, when dragging vehicle or equipment operation, contactor Q1, Q2 closure, when braking and stopping, contactor Q1, Q2 disjunction, governing system and power supply are disconnected, the sense of current of KA1, KA2 or KB1, KB2 switch control motor armature M, thereby reversing rotation of motors.
Claims (1)
1. safe and reliable dragging and braking conversion device for DC motor armature winding, comprise pulliung circuit and braking circuit, it is characterized in that: the two ends of the direct current machine armature winding M in the described pulliung circuit are provided with reversing switch KA1 respectively, KA2, KB1 and KB2, described reversing switch KA1 or KB2 connect the end of described armature winding M, described reversing switch KA2 or KB1 connect the other end of described armature winding M, described reversing switch KA1 is connected with KB1, described reversing switch KA2 is connected with KB2 and is connected with the anode of diode D1, make described filter capacitor C0+utmost point, an end that has the direct current machine armature winding M of described reversing switch KA1 or KB1, the C utmost point of the negative electrode of diode D3 and IGBT1 is connected to a common point, and the E utmost point of IGBT1 and the negative electrode of diode D1 and stator winding F are connected to a common point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201845356U CN201789465U (en) | 2010-05-11 | 2010-05-11 | Safe and reliable direct-current motor armature winding traction brake changeover device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201845356U CN201789465U (en) | 2010-05-11 | 2010-05-11 | Safe and reliable direct-current motor armature winding traction brake changeover device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201789465U true CN201789465U (en) | 2011-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201845356U Expired - Fee Related CN201789465U (en) | 2010-05-11 | 2010-05-11 | Safe and reliable direct-current motor armature winding traction brake changeover device |
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| Country | Link |
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| CN (1) | CN201789465U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860308A (en) * | 2010-05-11 | 2010-10-13 | 沈阳新阳光机电科技有限公司 | Safe and reliable dragging and braking conversion device for DC motor armature winding |
| CN102497138A (en) * | 2011-12-07 | 2012-06-13 | 北京科诺伟业科技有限公司 | Overspeed protection device of series excited DC (Direct Current) motor with variable-pitch system |
-
2010
- 2010-05-11 CN CN2010201845356U patent/CN201789465U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860308A (en) * | 2010-05-11 | 2010-10-13 | 沈阳新阳光机电科技有限公司 | Safe and reliable dragging and braking conversion device for DC motor armature winding |
| CN102497138A (en) * | 2011-12-07 | 2012-06-13 | 北京科诺伟业科技有限公司 | Overspeed protection device of series excited DC (Direct Current) motor with variable-pitch system |
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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: 20110406 Termination date: 20140511 |