CN203219228U - Prompt braking circuit of controllable resistors and capacitors - Google Patents
Prompt braking circuit of controllable resistors and capacitors Download PDFInfo
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- CN203219228U CN203219228U CN 201320129623 CN201320129623U CN203219228U CN 203219228 U CN203219228 U CN 203219228U CN 201320129623 CN201320129623 CN 201320129623 CN 201320129623 U CN201320129623 U CN 201320129623U CN 203219228 U CN203219228 U CN 203219228U
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Abstract
The utility model discloses a prompt braking circuit of controllable resistors and capacitors. The prompt braking circuit comprises an energy storage circuit, an energy consumption circuit and an inverter connected in order. The energy consumption circuit is formed by resistors and capacitors and comprises a MOSFET, a second electrolytic capacitor, two resistors and an IGBT. The prompt braking circuit enables a motor to stop promptly by using an energy consumption braking method, has the advantages of simple and novel structure, easy control, rapid heat dissipation, low loss, high universality and low cost, and is suitable for industrial sewing machines (500W) and numerically-controlled machine tools (5.0kM) which depend on power supply by transducers and require prompt location.
Description
Technical field
The utility model relates to a kind of fast braking technology of electric and electronic technical field, particularly, relates to the fast braking circuit of a kind of controllable resistor and electric capacity.
Background technology
The fast braking technology is the important component part of commercial Application technology.Fast development along with some industrial circle, waiting as industrial sewing machine (500W), the Digit Control Machine Tool (5.0kW is following) of single phase alternating current power supply power supply needs the converters of locating fast, for making that the requirement of the fast braking technology that motor quick and precisely stops is more and more higher.Therefore, rapid heat dissipation, energy consumption is little, and the simple fast braking circuit of control strategy meets the demand for development of fast braking technology, has a good application prospect.
The fast braking scheme has a variety of, relatively more commonly used is the dynamic braking scheme at present, in the DC loop of frequency converter power resistor being set connects with power switch, when braking, pass through the duty ratio of control power switch, make power resistor consume energy, the energy of feedback when shifting motor brake is implemented braking.This mode of braking is the power consumption mode, and the low-hanging fruit of braking still has some deficits.
Through the existing retrieval that is fit to the fast braking technology is found, article " the accurate positioning control design for scheme of a kind of brushless DC motor fast braking " (" industrial and mineral automation ", 2010 the 9th phases) describe in when the motor skidding, make the motor power short circuit, make to produce a rotating magnetic field opposite with the inertia direction of rotation in the motor, make the motor fast braking.This method control is complicated, cost is higher, and braking energy consumption is not suitable for the application scenario of frequent braking in motor interior.In original other dynamic braking mode, DC loop voltage can not be lower than the peak value of line voltage during braking, otherwise brake circuit needs the feedback energy while of releasing motor, also will discharge the energy from power supply, causes the not enough situation of the braking degree of depth.
Need to adopt new fast braking technology, so that simplified structure, simplification control, reduce cost and improve braking ability for this reason.
The utility model content
Because the above-mentioned defective of prior art, technical problem to be solved in the utility model provides the fast braking circuit of a kind of controllable resistor and electric capacity, can realize quick dynamic braking, has advantages such as simple in structure, that control is easy, with low cost.
For achieving the above object, the utility model provides the fast braking circuit of a kind of controllable resistor and electric capacity, comprises the accumulator that connects successively, energy consumption circuit and inverter; Described energy consumption circuit is resistance capacitance energy consumption circuit, comprises a MOSFET, second electrochemical capacitor, two resistance and an IGBT, and wherein, the drain electrode of described MOSFET links to each other with the input of DC power supply is anodal, and its source electrode links to each other with described Section Point; Described second electrochemical capacitor is in parallel with first resistance, and two ends connect Section Point and the 3rd node respectively; The second resistance two ends of connecting connect the 3rd node and the 4th node respectively; The collector electrode of described IGBT links to each other with the 4th node, and emitter links to each other with the 5th node; Wherein, described Section Point is the source electrode of described MOSFET and the tie point of described second electrochemical capacitor, described the 3rd node is the tie point of described second electrochemical capacitor and described second resistance, described the 4th node is the tie point of described second resistance and described IGBT, and described the 5th node is the input negative pole of described DC power supply.
Compared with prior art, the utlity model has following beneficial effect:
The utility model utilizes the dynamic braking principle of resistance and capacitor charge and discharge, realize the fast braking of motor, its circuit structure is simple, control is easy, fail safe good, meets the fast braking requirement, and has project organization novelty, highly versatile, advantage such as with low cost.
Description of drawings
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present utility model will become:
Fig. 1 is the fast braking circuit theory diagrams of controllable resistor of the present utility model and electric capacity.
Embodiment
Below in conjunction with specific embodiment the utility model is elaborated.Following examples will help those skilled in the art further to understand the utility model, but not limit the utility model in any form.Should be pointed out that to those skilled in the art, under the prerequisite that does not break away from the utility model design, can also make some modification and improvement.These all belong to protection range of the present utility model.
As shown in Figure 1, the fast braking circuit of a kind of controllable resistor and electric capacity, comprise an accumulator, an energy consumption circuit and an inverter, wherein, accumulator is in parallel with the energy consumption circuit, and the input of energy consumption circuit links to each other with the output of DC power supply, and the output of energy consumption circuit links to each other with the input of inverter.Inverter drives motor work, when needing emergency shutdown, is consumed the energy storage of shifting motor fast or is added geopotential energy by the energy consumption circuit.In the energy consumption circuit electric capacity is charged, absorb energy by conductive discharge, realize dynamic braking.
Its particular circuit configurations is described in detail in detail below.
Accumulator 1 is big capacitance energy storage, comprises the first electrochemical capacitor E1, and the described first electrochemical capacitor positive pole links to each other with the anodal P1 of the input of DC power supply, and its negative pole links to each other with the input negative pole N1 of DC power supply;
Wherein, first node O1 is the anodal P1 of the input of described DC power supply, the drain electrode that described Section Point O2 is described MOSFET S1 and the tie point of the described first electrochemical capacitor E1, described the 3rd node O3 is the tie point of the described second electrochemical capacitor E2 and described second resistance R 2, described the 4th node O4 is the tie point of described second resistance R 2 and described IGBT S2, the input negative pole N1 that described the 5th node O5 is described DC power supply;
Described inverter is the voltage source inverter of corresponding power grade.
Described accumulator also can be batteries for comprising big electric capacity.
Particularly, in the utility model, the parameter of each device that adopts is as follows:
The capacitance of the first electrochemical capacitor E1 is 680 μ F, and withstand voltage is 400V.The capacitance of the second electrochemical capacitor E2 is 68 μ F, and withstand voltage is 400V.
The resistance value of first resistance is 68 Ω, and power is 50W.The resistance value of second resistance is 33 Ω, and power is 50W.
The parameter of IGBT is 25A/100 ° of C of anti-stream, and withstand voltage is 600V.The parameter of MOSFET is 20A/100 ° of C of anti-stream, and withstand voltage is 500V.
In concrete the use, MOSFET and IGBT gate pole receive the pwm pulse control signal, and work as follows: when motor normally moves, MOSFET S1 is in conducting, during MOSFET S1 off-state, IGBT S2 adopts certain duty ratio PWM to carry out copped wave, gives the charging of second electrochemical capacitor by second resistance, and the appearance value of second electrochemical capacitor E2 charging is enough big, the second electrochemical capacitor E2 is to 1 discharge of first resistance R simultaneously, when the duty ratio of IGBT S2 hour, realize conventional dynamic braking, when the duty ratio of IGBT S2 is big, realize quick energy consumption system, when braking energy is quite high, with the antiparallel diode current flow of MOSFET S1, excess energy is transferred to the first electrochemical capacitor E1, the restriction direct voltage raises, play braking action, prevent that simultaneously the energy of accumulator 1 from flowing to power consumption circuit 2, influence braking rapidity.In addition, in the IGBT S2 turn-off time, the second electrochemical capacitor E2 is by 1 discharge of first resistance R, and energy storage resets, and does not influence braking procedure next time.
By the way, the utility model has operate as normal, conventional brake, three kinds of working methods of fast braking, the speed that also can regulate braking by the appearance value of regulating electrochemical capacitor E2.
The utility model adopts the dynamic braking mode that motor is stopped fast, its circuit structure is simple, control is easy, rapid heat dissipation, loss are little, being applicable to that industrial sewing machine (500W), Digit Control Machine Tool (5.0kW is following) wait needs the circuit electronic converter application of location fast, and has project organization novelty, highly versatile, advantage such as with low cost.
More than specific embodiment of the utility model is described.It will be appreciated that the utility model is not limited to above-mentioned specific implementations, those skilled in the art can make various distortion or modification within the scope of the claims, and this does not influence flesh and blood of the present utility model.
Claims (7)
1. the fast braking circuit of a controllable resistor and electric capacity is characterized in that, comprises the accumulator that connects successively, energy consumption circuit and inverter; Described energy consumption circuit is resistance capacitance energy consumption circuit, comprises a MOSFET, second electrochemical capacitor, two resistance and an IGBT, and wherein, the drain electrode of described MOSFET links to each other with the input of DC power supply is anodal, and its source electrode links to each other with described Section Point; Described second electrochemical capacitor is in parallel with first resistance, and two ends connect Section Point and the 3rd node respectively; The second resistance two ends of connecting connect the 3rd node and the 4th node respectively; The collector electrode of described IGBT links to each other with the 4th node, and emitter links to each other with the 5th node; Wherein, described Section Point is the source electrode of described MOSFET and the tie point of described second electrochemical capacitor, described the 3rd node is the tie point of described second electrochemical capacitor and described second resistance, described the 4th node is the tie point of described second resistance and described IGBT, and described the 5th node is the input negative pole of described DC power supply.
2. the fast braking circuit of controllable resistor according to claim 1 and electric capacity, it is characterized in that, described accumulator is big capacitance energy storage, comprise first electrochemical capacitor, the described first electrochemical capacitor positive pole links to each other with the input of DC power supply is anodal, and its negative pole links to each other with the input negative pole of DC power supply.
3. the fast braking circuit of controllable resistor according to claim 2 and electric capacity is characterized in that, the capacitance of described first electrochemical capacitor is 680 μ F, and withstand voltage is 400V.
4. according to the fast braking circuit of each described controllable resistor of claim 1-3 and electric capacity, it is characterized in that the resistance value of described first resistance is 68 Ω, power is 50W; The resistance value of second resistance is 33 Ω, and power is 50W.
5. according to the fast braking circuit of each described controllable resistor of claim 1-3 and electric capacity, it is characterized in that the parameter of described IGBT is 25A/100 ° of C of anti-stream, withstand voltage is 600V; The parameter of MOSFET is 20A/100 ° of C of anti-stream, and withstand voltage is 500V.
6. according to the fast braking circuit of each described controllable resistor of claim 1-3 and electric capacity, it is characterized in that the capacitance of described second electrochemical capacitor is 68 μ F, withstand voltage is 400V.
7. the fast braking circuit of controllable resistor according to claim 1 and electric capacity is characterized in that, described inverter is the voltage source inverter of corresponding power grade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320129623 CN203219228U (en) | 2013-03-20 | 2013-03-20 | Prompt braking circuit of controllable resistors and capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320129623 CN203219228U (en) | 2013-03-20 | 2013-03-20 | Prompt braking circuit of controllable resistors and capacitors |
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| Publication Number | Publication Date |
|---|---|
| CN203219228U true CN203219228U (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320129623 Expired - Fee Related CN203219228U (en) | 2013-03-20 | 2013-03-20 | Prompt braking circuit of controllable resistors and capacitors |
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| Country | Link |
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| CN (1) | CN203219228U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199772A (en) * | 2013-03-20 | 2013-07-10 | 上海交通大学 | Circuit for achieving motor rapid energy consumption braking |
| CN106856320A (en) * | 2015-12-09 | 2017-06-16 | 青岛中石大蓝天石油技术有限公司 | A kind of oil well terminal voltage protection circuit |
-
2013
- 2013-03-20 CN CN 201320129623 patent/CN203219228U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199772A (en) * | 2013-03-20 | 2013-07-10 | 上海交通大学 | Circuit for achieving motor rapid energy consumption braking |
| CN103199772B (en) * | 2013-03-20 | 2015-10-28 | 上海交通大学 | Realize the circuit of motor fast dynamic braking |
| CN106856320A (en) * | 2015-12-09 | 2017-06-16 | 青岛中石大蓝天石油技术有限公司 | A kind of oil well terminal voltage protection circuit |
| CN106856320B (en) * | 2015-12-09 | 2019-10-18 | 中石大蓝天(青岛)石油技术有限公司 | A kind of oil well terminal voltage protection circuit |
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| Date | Code | Title | Description |
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| 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: 20130925 Termination date: 20140320 |