CN104935215A - Braking unit - Google Patents
Braking unit Download PDFInfo
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- CN104935215A CN104935215A CN201510302038.9A CN201510302038A CN104935215A CN 104935215 A CN104935215 A CN 104935215A CN 201510302038 A CN201510302038 A CN 201510302038A CN 104935215 A CN104935215 A CN 104935215A
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- control unit
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Abstract
The invention discloses a braking unit which comprises a braking resistor, an IGBT switching circuit used for controlling operations of the braking resistor and a power supply unit. The braking unit further comprises a control unit used for controlling operations of the IGBT switching circuit, and is characterized in that a signal output port of the control unit is electrically connected with the IGBT switching circuit through an IGBT driving unit, the IGBT switching circuit is provided with a temperature detection unit, the temperature detection unit is electrically connected with a signal input port of the control unit, the temperature detection unit comprises a temperature sensor and a pulse transformer TRANS1, the temperature sensor is connected with a secondary coil of the pulse transformer TRANS1, and a primary coil of the pulse transformer TRANS1 is electrically connected with a signal input terminal of a singlechip microcomputer. The braking unit realizes real-time monitoring for voltage, current, temperature and the like, and enables a user to know use conditions on site more quickly, thereby better solving problems.
Description
Technical field
The present invention relates to technical field of electronic equipment, particularly relate to a kind of brake unit.
Background technology
Brake unit, full name is " frequency converter tailored version dynamic braking unit ", or " frequency converter tailored version energy feedback unit ", be mainly used in controlling mechanical duty ratio heavier, occasion that retro-speed requires quickly, the regenerative electric energy utilizing brake resistance to be produced by motor is consumed by brake resistance, or regenerative current is fed back to electric current, at present, traditional brake unit compares gathered DC bus signal and a fixed voltage value with voltage comparator, exports the break-make of a signal control IGBT.Found by long-term practice, the dependence hardware single due to this traditional mode controls, and therefore brake voltage is non-adjustable.Overcurrent protection simultaneously in circuit relies on fuse, once overcurrent, fuse is burnt.Brake unit is irrecoverable, can only change components and parts.IGBT(Insulated Gate Bipolar Transistor insulated gate bipolar transistor) in the energy consumption electric current that flows through also be non-adjustable, just single dependence IGBT opens or closes for a long time.
Therefore, need to provide the brake unit that a kind of intelligence degree is high, security performance is strong.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of brake unit, comprising: brake resistance, for controlling IGBT switching circuit and the power subsystem of described brake resistance work; Also comprise: for controlling the control unit of described IGBT switching circuit work; The signal output port of described control unit is by IGBT driver element and the electrical connection of IGBT switching circuit, described IGBT switching circuit is provided with temperature detecting unit, described temperature detecting unit is electrically connected with the signal input port of described control unit, described temperature detecting unit comprises temperature sensor and pulse transformer TRANS1, wherein: temperature sensor is connected with the secondary coil of pulse transformer TRANS1, the primary coil of pulse transformer TRANS1 is electrically connected with the letter terminal of single-chip microcomputer.
Preferably, also comprise be electrically connected with described control unit braking lockout circuit, fault recognition circuit and reset circuit.
Preferably, the single-chip microcomputer of described control unit to be model be MSP430F1232.
Preferably, described IGBT switching circuit comprises IGBT pipe T1 ~ T8, and the grid of described IGBT pipe T1 ~ T8 is electrically connected with described IGBT driver element by resistance R21 ~ R28.
Preferably, described IGBT driver element comprises two identical electronic circuits, and one of them electronic circuit comprises NPN transistor T13 and PNP transistor T11, and the collector electrode of described NPN transistor T13 is connected with 15V power electric by resistance R27; Between the base stage and emitter of NPN transistor T13, be connected to resistance R39, the collector electrode of NPN transistor T13 is by electric capacity C11 ground connection.
Technical scheme of the present invention has following beneficial effect:
The present invention utilizes single-chip microcomputer to produce PWM ripple to control IGBT switching circuit conducting and shutoff, according to the duty ratio of detected busbar voltage control PWM ripple, controls the size of energy consumption electric current.By detecting energy consumption electric current, with the size of busbar voltage, single-chip microcomputer determines whether the rated power exceeding this device, if exceeded, fault alarm, asks staff to confirm fault.Change the brake unit of more powerful brake unit or multiple same configuration in parallel.This device adopts the process of intelligentized control method, overcomes conventional hardware control circuit and controls inconvenient drawback.By hardware detecting circuit, in conjunction with the Based Intelligent Control of single-chip microcomputer, achieve voltage, electric current, the real-time monitoring of temperature etc., make user can understand on-the-spot behaviour in service faster, thus better deal with problems.
Accompanying drawing explanation
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Fig. 1 is the structured flowchart of the present invention second specific embodiment;
Fig. 2 is partial circuit diagram of the present invention, is mainly used in the circuit structure of indicative control unit;
Fig. 3 is partial circuit diagram of the present invention, is mainly used in the circuit structure showing IGBT switching circuit;
Fig. 4 is partial circuit diagram of the present invention, is mainly used in the circuit structure showing IGBT driver element;
Fig. 5 is partial circuit diagram of the present invention, is mainly used in the circuit structure of displays temperature detecting unit;
Fig. 6 is partial circuit diagram of the present invention, is mainly used in the circuit structure of display power supply unit;
Fig. 7 is partial circuit diagram of the present invention, is mainly used in the circuit structure showing braking lockout circuit and fault recognition circuit;
Fig. 8 is partial circuit diagram of the present invention, is mainly used in the circuit structure showing fault message output circuit.
Description of reference numerals: 1, temperature detecting unit; 2, control unit; 3, IGBT driver element; 4, IGBT switching circuit; 5, brake resistance; 6, lockout circuit is braked; 7, fault recognition circuit; 8, reset circuit.
Embodiment
In order to have a clear understanding of technical scheme of the present invention, its detailed structure will be proposed in the following description.Obviously, the concrete execution of the embodiment of the present invention also not enough specific details being limited to those skilled in the art and haveing the knack of.The preferred embodiments of the present invention are described in detail as follows, and except these embodiments described in detail, can also have other execution modes.
Refer to Fig. 1, a kind of brake unit, comprising: temperature detecting unit 1, control unit 2, IGBT driver element 3, IGBT switching circuit 4, brake resistance 5 and power subsystem; Wherein: IGBT switching circuit 4 is for controlling the operating state of brake resistance 5, control unit 2 is for the operating state of control IGBT switching circuit, the signal output port of control unit 2 is electrically connected by IGBT driver element 3 and IGBT switching circuit 4, temperature detecting unit 1 is arranged on IGBT switching circuit 4, and temperature detecting unit 1 is electrically connected with the signal input port of control unit 2.In this specific embodiment, control unit 2 preferably model is the single-chip microcomputer of MSP430F1232; Also comprise be electrically connected with control unit 2 braking lockout circuit 6, fault recognition circuit 7 and reset circuit 8.
The operation principle of this specific embodiment is: be connected on frequency converter, inverter and common DC bus by brake unit by DC bus connecting terminals, single-chip microcomputer is utilized to produce PWM ripple to control IGBT conducting and shutoff, according to the duty ratio of detected busbar voltage control PWM ripple, control the size of energy consumption electric current.By detecting energy consumption electric current, with the size of busbar voltage, single-chip microcomputer determines whether the rated power exceeding this device, when DC bus-bar voltage reaches a limit value, the signal that intelligent brake unit utilizes testing circuit to detect, by the switch of single-chip microcomputer internal processes control IGBT switching circuit 4, and detect the signals such as the electric current in the temperature of IGBT switching circuit 4, brake resistance 5, with the good operation of assurance device simultaneously.
Refer to Fig. 2, in above-mentioned specific embodiment, control unit 2 model is the single-chip microcomputer of MSP430F1232, and what reset circuit 8 was selected is model is the watchdog chip of TPS3823-33.
Refer to Fig. 3, in above-mentioned specific embodiment, IGBT switching circuit 4 comprises IGBT pipe T1 ~ T8, and the grid of described IGBT pipe T1 ~ T8 is electrically connected by resistance R21 ~ R28 and IGBT driver element 3.So just reach multitube and be distributed through energy consumption electric current in brake resistance 5 simultaneously, reach the effect of power-sharing, if wherein have one by all means because certain reason breaks down, the equally normal work of other pipes, can not produce too much influence.
Refer to Fig. 4, in above-mentioned specific embodiment, IGBT driver element 3 comprises two identical electronic circuits, and one of them electronic circuit comprises NPN transistor T13 and PNP transistor T11, the emitter electrical connection of NPN transistor T13 and PNP transistor T11; The collector electrode of described NPN transistor T13 is connected with 15V power electric by resistance R27; Between the base stage and emitter of NPN transistor T13, be connected to resistance R39, the collector electrode of NPN transistor T13 is by electric capacity C11 ground connection; IGBT driver element 3 is electrically connected with IGBT switching circuit 4 by resistance R37, resistance R38.
Refer to Fig. 5, in above-mentioned specific embodiment, temperature detecting unit 1 comprises temperature sensor and pulse transformer TRANS1, and wherein: temperature sensor is connected with the secondary coil of pulse transformer TRANS1, the primary coil of pulse transformer TRANS1 is electrically connected with the signal input terminal of single-chip microcomputer; When temperature is too high, the resistance of temperature sensor can sharply decline, then single-chip microcomputer acknowledge(ment) signal, carries out the shutoff of IGBT.
Refer to Fig. 6, in above-mentioned specific embodiment, power subsystem includes: chip U4 DC24V being converted to 5V, and 5V is converted to the chip U8 of VCC, electric capacity C21 ~ C30, voltage-stabiliser tube D20, resistance R40 ~ R42, Vcc are 3.3V voltage, for control unit 2 provides power supply
Refer to Fig. 7, in above-mentioned specific embodiment, braking lockout circuit and fault recognition circuit comprise terminal X38, optocoupler U2, voltage-stabiliser tube D8, diode D9, resistance R20, resistance R21, access GND by terminal X38.
Refer to Fig. 8, in above-mentioned specific embodiment, fault message output circuit comprises terminal X38, optocoupler U1, metal-oxide-semiconductor U3, diode D10 ~ D12, resistance R22 ~ R24, the level exported by the port 5 of detection terminal X38 confirms the working condition formulating unit, as whether having fault, whether be blocked styate etc.
The present invention utilizes single-chip microcomputer to produce PWM ripple to control IGBT switching circuit conducting and shutoff, according to the duty ratio of detected busbar voltage control PWM ripple, controls the size of energy consumption electric current.By detecting energy consumption electric current, with the size of busbar voltage, single-chip microcomputer determines whether the rated power exceeding this device, if exceeded, fault alarm, asks staff to confirm fault.Change the brake unit of more powerful brake unit or multiple same configuration in parallel.This device adopts the process of intelligentized control method, overcomes conventional hardware control circuit and controls inconvenient drawback.By hardware detecting circuit, in conjunction with the Based Intelligent Control of single-chip microcomputer, achieve voltage, electric current, the real-time monitoring of temperature etc., make user can understand on-the-spot behaviour in service faster, thus better deal with problems
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; although with reference to above-described embodiment to invention has been detailed description; those of ordinary skill in the field still can modify to the specific embodiment of the present invention or equivalent replacement; these do not depart from any amendment of spirit and scope of the invention or equivalent replacement, are all applying within the claims awaited the reply.
Claims (5)
1. a brake unit, comprising: brake resistance, for controlling IGBT switching circuit and the power subsystem of described brake resistance work; It is characterized in that: also comprise: for controlling the control unit of described IGBT switching circuit work; The signal output port of described control unit is by IGBT driver element and the electrical connection of IGBT switching circuit, described IGBT switching circuit is provided with temperature detecting unit, described temperature detecting unit is electrically connected with the signal input port of described control unit, described temperature detecting unit comprises temperature sensor and pulse transformer TRANS1, wherein: temperature sensor is connected with the secondary coil of pulse transformer TRANS1, the primary coil of pulse transformer TRANS1 is electrically connected with the letter terminal of single-chip microcomputer.
2. brake unit according to claim 1, is characterized in that: also comprise be electrically connected with described control unit braking lockout circuit, fault recognition circuit and reset circuit.
3. brake unit according to claim 1, is characterized in that: the single-chip microcomputer of described control unit to be model be MSP430F1232.
4. brake unit according to claim 1, is characterized in that: described IGBT switching circuit comprises IGBT pipe T1 ~ T8, and the grid of described IGBT pipe T1 ~ T8 is electrically connected with described IGBT driver element by resistance R21 ~ R28.
5. brake unit according to claim 1, it is characterized in that: described IGBT driver element comprises two identical electronic circuits, one of them electronic circuit comprises NPN transistor T13 and PNP transistor T11, and the collector electrode of described NPN transistor T13 is connected with 15V power electric by resistance R27; Between the base stage and emitter of NPN transistor T13, be connected to resistance R39, the collector electrode of NPN transistor T13 is by electric capacity C11 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510302038.9A CN104935215A (en) | 2015-06-05 | 2015-06-05 | Braking unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510302038.9A CN104935215A (en) | 2015-06-05 | 2015-06-05 | Braking unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104935215A true CN104935215A (en) | 2015-09-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510302038.9A Pending CN104935215A (en) | 2015-06-05 | 2015-06-05 | Braking unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN104935215A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374784A (en) * | 2016-08-31 | 2017-02-01 | 南京晨光集团有限责任公司 | Circuit for achieving energy consumption breaking by voltage comparison and control method |
| CN105515453B (en) * | 2016-03-02 | 2018-07-03 | 珠海格力电器股份有限公司 | A kind of servo-driver brake control circuit |
| CN110299721A (en) * | 2018-03-23 | 2019-10-01 | 北京金风科创风电设备有限公司 | Braking power control method and device and wind generating set |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10322893A (en) * | 1997-04-25 | 1998-12-04 | Elan Schaltelemente Gmbh | Method for monitoring motor, especially extremely active servo driver, and load relay used therein |
| KR20000043873A (en) * | 1998-12-29 | 2000-07-15 | 이구택 | Contactless device of a magnet brake |
| CN101707462A (en) * | 2009-11-16 | 2010-05-12 | 肖海乐 | Braking unit and IGBT module protection method thereof |
| CN101741230A (en) * | 2009-12-14 | 2010-06-16 | 天水电气传动研究所有限责任公司 | High-power brake unit |
| CN202798440U (en) * | 2012-07-20 | 2013-03-13 | 中冶南方（武汉）自动化有限公司 | Intelligent braking unit for inverters |
| CN203434898U (en) * | 2013-07-03 | 2014-02-12 | 天津市红日电气自动化有限公司 | Intelligent brake unit |
-
2015
- 2015-06-05 CN CN201510302038.9A patent/CN104935215A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10322893A (en) * | 1997-04-25 | 1998-12-04 | Elan Schaltelemente Gmbh | Method for monitoring motor, especially extremely active servo driver, and load relay used therein |
| KR20000043873A (en) * | 1998-12-29 | 2000-07-15 | 이구택 | Contactless device of a magnet brake |
| CN101707462A (en) * | 2009-11-16 | 2010-05-12 | 肖海乐 | Braking unit and IGBT module protection method thereof |
| CN101741230A (en) * | 2009-12-14 | 2010-06-16 | 天水电气传动研究所有限责任公司 | High-power brake unit |
| CN202798440U (en) * | 2012-07-20 | 2013-03-13 | 中冶南方（武汉）自动化有限公司 | Intelligent braking unit for inverters |
| CN203434898U (en) * | 2013-07-03 | 2014-02-12 | 天津市红日电气自动化有限公司 | Intelligent brake unit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515453B (en) * | 2016-03-02 | 2018-07-03 | 珠海格力电器股份有限公司 | A kind of servo-driver brake control circuit |
| CN106374784A (en) * | 2016-08-31 | 2017-02-01 | 南京晨光集团有限责任公司 | Circuit for achieving energy consumption breaking by voltage comparison and control method |
| CN106374784B (en) * | 2016-08-31 | 2019-10-18 | 南京晨光集团有限责任公司 | Compare the circuit and control method for realizing dynamic braking by voltage |
| CN110299721A (en) * | 2018-03-23 | 2019-10-01 | 北京金风科创风电设备有限公司 | Braking power control method and device and wind generating set |
| CN110299721B (en) * | 2018-03-23 | 2020-09-08 | 北京金风科创风电设备有限公司 | Braking power control method and device and wind generating set |
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Application publication date: 20150923 |
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