CN103199770B - Electromotor braking device - Google Patents
Electromotor braking device Download PDFInfo
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- CN103199770B CN103199770B CN201310090982.3A CN201310090982A CN103199770B CN 103199770 B CN103199770 B CN 103199770B CN 201310090982 A CN201310090982 A CN 201310090982A CN 103199770 B CN103199770 B CN 103199770B
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Abstract
The invention provides an electromotor braking device which comprises an energy storage device, an energy consumption circuit and an invertion device. One end of the energy storage device is connected with a positive pole of a direct current power source, and the other end of the energy storage device is connected with a negative pole of the direct current power source. The input end of the energy consumption circuit is connected with the energy storage device, and the output end of the energy consumption circuit is connected with the input end of the invertion device. The energy consumption circuit is a resistor and fan energy consumption circuit. The energy consumption circuit comprises two MOSFETs, a first alternating current capacitor, a second electrolytic capacitor, three resistors, three diodes, a high-frequency transformer, a voltage-regulator diode and a direct current radiator fan. According to the electromotor braking device, shutdown of an electromotor can be carried out fast and frequently, a circuit is simple in structure, easy and convenient to control, fast in heat dissipation and small in loss, and the electromotor braking device is suitable for application occasions needing fast positioning, wherein the occasions include industrial sewing machines and numerical control machine tools which are supplied with power by frequency converters. The electromotor braking device has the advantages of being novel in design structure, strong in generality, low in cost and the like.
Description
Technical field
The present invention relates to a kind of fast braking technology of electric and electronic technical field, particularly, relate to a kind of motor brake device.
Background technology
Fast braking technology is the important component part of commercial Application technology.Along with the fast development of some industrial circle, the industrial sewing machine (500W), Digit Control Machine Tool (below 5.0kW) etc. of powering as single phase alternating current power supply need the converters of quick position, and the requirement of the fast braking technology of quick and precisely stopping for making motor 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.
Fast braking scheme has a variety of, relatively more conventional is dynamic braking scheme at present, arrange power resistor in the DC loop of frequency converter to connect with power switch, when braking by controlling the duty ratio of power switch, power resistor is consumed energy, the energy of feedback during transfer motor brake, implements braking.This mode of braking is power consumption mode, and the low-hanging fruit of braking still has some deficits.
Through finding the retrieval of existing applicable fast braking technology, article " design of the accurate positioning control scheme of a kind of brushless DC motor fast braking " (" industrial and mineral automation ", 2010 the 9th phases) in describe when motor skidding, make motor power short circuit, make the rotating magnetic field that in motor, generation one is contrary with inertial rotation direction, make motor fast braking.The method controls complexity, cost is higher, and braking energy consumption, in motor interior, is not suitable for the application scenario of frequent braking.In other dynamic braking mode original, during braking, DC loop voltage can not lower than the peak value of line voltage, otherwise brake circuit needs the feedback energy of releasing motor simultaneously, also will discharge the energy from power supply, causes the situation that the braking degree of depth is inadequate.
Need to adopt new fast braking technology, so that simplified structure, simplification control, reduce costs and improve performance for this reason.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide a kind of motor brake device, can realize fast dynamic braking, have structure simple, control the advantages such as easy, with low cost.
For achieving the above object, the invention provides a kind of motor brake device, comprise energy storage device, power circuitry and inverter; Wherein energy storage device is connected with the input of power circuitry with the output of DC power supply respectively, and the output of power circuitry is connected with the input of inverter;
Described power circuitry is resistance power circuitry, comprise two MOSFET, the first ac capacitor, the second electrochemical capacitor, three resistance, three diodes, high frequency transformer, a voltage stabilizing didoe and a DC radiation fan, wherein, the drain electrode of the one MOSFET is connected with the input positive pole of DC power supply, and its source electrode is connected with described Section Point; The first described resistance is in parallel with the first diode, and two ends connect Section Point and the 3rd node respectively; Two ends, described high frequency transformer former limit connect the 3rd node and the 7th node respectively; Described first ac capacitor and the second resistor coupled in parallel, two ends connect the 3rd node and the 4th node; Described second diode and the second resistant series, negative electrode connects the 4th node, and anode connects the 7th node; Described high frequency transformer secondary different name end and the 3rd described Diode series, negative electrode connects the 5th node; The second described electrochemical capacitor, the 3rd resistance, voltage stabilizing didoe are in parallel with DC radiation fan, and two ends connect the 5th node and the 6th node respectively; The drain electrode of the 2nd MOSFET is connected with the 7th node, and source electrode is connected with the 8th node;
Wherein, first node is the input positive pole of described DC power supply, described Section Point is the source electrode of a described MOSFET and the tie point of described first resistance, described 3rd node is the tie point of described first resistance and described high frequency transformer former limit Same Name of Ends, described 4th node is the tie point of described second resistance and described second diode cathode, described 5th node is the tie point of described 3rd diode cathode and described second electrochemical capacitor, described 6th node is described high frequency transformer secondary Same Name of Ends, described 7th node is the tie point of described second diode and described 2nd MOSFET, described 8th node is the input negative pole of described DC power supply,
Described inverter is the voltage source inverter of corresponding power grade.
In the present invention, the gate pole of two MOSFET accepts pwm pulse control signal, and during a MOSFET on-state, the 2nd MOSFET turns off, and inverter normally runs, and driving electric machine works; When needs are braked, during a MOSFET off-state, the 2nd MOSFET adopts certain duty ratio PWM to carry out copped wave, during conducting, set up electric current by power first resistance, the former limit of high frequency transformer, high frequency transformer stores magnetic energy, first resistance power consumption realizes fast braking, and duty ratio is larger, brakes faster.When 2nd MOSFET turns off, high frequency transformer secondary induced voltage is the second electrochemical capacitor charging by the 3rd diode, and simultaneously for DC fan is powered, DC fan is run and power consumption, is the heater element heat radiations such as power device.3rd resistance is dummy resistance.Voltage stabilizing didoe plays pressure limiting effect, prevents DC fan overvoltage from burning.Second resistance, the first ac capacitor and the second diode start and limit the too high clamping action of high frequency transformer former limit induced voltage and magnetic circuit reset response.
Compared with prior art, the present invention has following beneficial effect:
Apparatus of the present invention utilize power resistor directly to consume energy, the means of high frequency transformer dump energy, DC fan heat radiation power consumption can: (1) realizes power resistor power consumption under big space rate, can be implemented in the 2nd MOSFET blocking interval and continue through high frequency transformer dump energy, DC fan heat radiation power consumption, therefore can obtain big space rate to consume energy fast and more fast braking, partial brake energy can also be used to auxiliary heat dissipation; (2) resistance of power resistor can reduce or cancel use power resistor, is dispelled the heat by DC fan completely; (3) when braking, a MOSFET keeps off state, and the energy of energy storage device can not supplement to energy consuming circuitry.If the energy of energy storage device is too high, conversely, energy consuming circuitry can also by energy feedback energy storage device.The terminal voltage of power circuitry can lower than energy storage device, and power circuitry can realize deep discharge and more repid discharge.Circuit structure of the present invention is simple, it is easy to control, fail safe good, meets fast braking requirement, and has project organization novelty, highly versatile, the advantage such as with low cost.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is a kind of motor brake schematic diagram of device of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some modification and improvement can also be made.These all belong to protection scope of the present invention.
As shown in Figure 1, a kind of fast dynamic braking circuit, comprises energy storage device, power circuitry and inverter, and wherein, energy storage device is in parallel with power circuitry, and the input of circuit is connected with the output of DC power supply, and output is connected with the input of inverter.Inverter driving electric machine works, and when needing emergency shutdown, consumes the energy storage of transfer motor or additional geopotential energy fast by power circuitry.In power circuitry, the direct power consumption of resistance, high frequency transformer stores magnetic energy, and DC fan consumed energy, during braking, accumulator does not affect energy consuming circuitry, realizes fast dynamic braking.
Its each several part particular circuit configurations is described in detail in detail below.
In the present embodiment, energy storage device 1 is bulky capacitor energy storage, comprises the first electrochemical capacitor E1, and described first electrochemical capacitor positive pole is connected with the input positive pole P1 of DC power supply, and its negative pole is connected with the input negative pole N1 of DC power supply;
In the present embodiment, power circuitry 2 is resistance energy consumption, DC fan energy consuming circuitry, comprise two MOSFET S1 and S2, two electric capacity C1 and E2, three resistance R1 ~ R3, three diode D1 ~ D3, high frequency transformer T1, a voltage stabilizing didoe ZD1 and DC radiation fan F1, wherein, the drain electrode of a described MOSFET S1 is connected with the input positive pole P1 of DC power supply, and its source electrode is connected with described Section Point O2; The first described resistance R1 is in parallel with the first diode D1, and two ends connect Section Point O2 and the 3rd node O3 respectively; Two ends, described high frequency transformer T1 former limit connect the 3rd node O3 and the 7th node O7 respectively; Described first ac capacitor C1 is in parallel with the second resistance R2, and two ends connect the 3rd node O3 and the 4th node O4; Described second diode D2 connects with the second resistance R2, and the second diode D2 negative electrode connects the 4th node O4, and anode connects the 7th node O7; Described high frequency transformer T1 secondary different name end is connected with the 3rd described diode D3, and negative electrode connects the 5th node O5; The second described electrochemical capacitor E2, the 3rd resistance R3, voltage stabilizing didoe ZD1 are in parallel with DC radiation fan F1, and two ends connect the 5th node O5 and the 6th node O6 respectively; The drain electrode of the 2nd MOSFET S2 is connected with the 7th node O7, and source electrode is connected with the 8th node O8;
First node O1 is the input positive pole P1 of described DC power supply, described Section Point O2 is the source electrode of a described MOSFET S1 and the tie point of described first resistance R1, described 3rd node O3 is the tie point of described first resistance R1 and described high frequency transformer T1 former limit Same Name of Ends, described 4th node O4 is the tie point of described second resistance R2 and described second diode D2 negative electrode, described 5th node O5 is the tie point of described 3rd diode D3 negative electrode and described second electrochemical capacitor E2, described 6th node O6 is described high frequency transformer T1 secondary Same Name of Ends, described 7th node O7 is the tie point of described second diode D2 and described 2nd MOSFET S2, described 8th node O8 is the input negative pole N1 of described DC power supply,
In the present embodiment, described inverter is the voltage source inverter of corresponding power grade.
In the present embodiment, energy storage device is the storage battery or the bulky capacitor that comprise multiple access interface.
Particularly, in the present embodiment, the parameter of each device adopted is as follows:
The capacitance of the first ac capacitor is 2 μ F, and withstand voltage is 600V, and the capacitance of the first electrochemical capacitor is 680 μ F, and withstand voltage is 400V, and the capacitance of the second electrochemical capacitor is 470 μ F, and withstand voltage is 100V.
The resistance value of the first resistance is 33 Ω, and power is 10W; The resistance value of the second resistance is 15 Ω, and power is 2W; The resistance value of the 3rd resistance is 10k Ω, and power is 1.0W.
The parameter of two MOSFET is resistance to stream 25A/100 ° of C, and withstand voltage is 500V.
The model of three diodes is 1N4148.
High frequency transformer no-load voltage ratio is 100:10, and power is 20W.
Voltage stabilizing didoe is voltage stabilizing 24V, and power is 2W.
In concrete use, the gate pole of described two MOSFET S1, S2 accepts pwm pulse control signal, and during a MOSFET S1 on-state, the 2nd MOSFET S2 turns off, and inverter normally runs, and driving electric machine works; During the one MOSFET S1 off-state, 2nd MOSFET S2 adopts certain duty ratio PWM to carry out copped wave, during conducting, sets up electric current by power first resistance R1, the former limit of high frequency transformer T1, high frequency transformer T1 stores magnetic energy, and the first resistance R1 power consumption realizes fast braking.When 2nd MOSFET S2 turns off, high frequency transformer T2 secondary induced voltage is that the second electrochemical capacitor E2 charges by the 3rd diode D3, and simultaneously for DC fan F1 powers, DC fan F1 runs and power consumption, is the heater element heat radiations such as power device.3rd resistance R3 is dummy resistance.Voltage stabilizing didoe ZD1 plays pressure limiting effect, prevents DC fan F1 overvoltage from burning.Second resistance R2, the first ac capacitor C1 and the second diode D2 start and limit the too high clamping action of high frequency transformer T1 former limit induced voltage and magnetic circuit reset response.
By the way, the present invention has normal work, fast braking two kinds of working methods.
The present invention adopts dynamic braking mode that motor is stopped fast, its circuit structure is simple, it is easy to control, rapid heat dissipation, loss are little, be applicable to the application of frequency converter occasion that industrial sewing machine (500W), Digit Control Machine Tool (5.0kW) etc. need quick position, and there is project organization novelty, highly versatile, the advantage such as with low cost.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (8)
1. a motor brake device, is characterized in that, comprises energy storage device, power circuitry and inverter; Wherein energy storage device is connected with the input of power circuitry with the output of DC power supply respectively, and the output of power circuitry is connected with the input of inverter;
Described energy storage device is bulky capacitor energy storage, comprises the first electrochemical capacitor, and described first electrochemical capacitor positive pole is connected with the input positive pole of DC power supply, and its negative pole is connected with the input negative pole of DC power supply;
Described power circuitry is resistance capacitance power circuitry, comprise two MOSFET, the first ac capacitor, the second electrochemical capacitor, three resistance, three diodes, high frequency transformer, a voltage stabilizing didoe and a DC radiation fan, wherein: the drain electrode of a MOSFET is connected with the input positive pole of DC power supply, and its source electrode is connected with Section Point; First resistance is in parallel with the first diode, and two ends connect Section Point and the 3rd node respectively; Two ends, described high frequency transformer former limit connect the 3rd node and the 7th node respectively; Described first ac capacitor and the second resistor coupled in parallel, two ends connect the 3rd node and the 4th node; Second diode and the second resistant series, the second diode cathode connects the 4th node, and anode connects the 7th node; Described high frequency transformer secondary different name end and the 3rd Diode series, negative electrode connects the 5th node; The second described electrochemical capacitor, the 3rd resistance, voltage stabilizing didoe are in parallel with DC radiation fan, and two ends connect the 5th node and the 6th node respectively; The drain electrode of the 2nd MOSFET is connected with the 7th node, and source electrode is connected with the 8th node;
Wherein, described Section Point is the source electrode of a described MOSFET and the tie point of described first resistance, described 3rd node is the tie point of described first resistance and described high frequency transformer former limit Same Name of Ends, described 4th node is the tie point of described second resistance and described second diode cathode, described 5th node is the tie point of described 3rd diode cathode and described second electrolytic capacitor anode, described 6th node is described high frequency transformer secondary Same Name of Ends, described 7th node is the tie point of described second diode and described 2nd MOSFET, described 8th node is the input negative pole of described DC power supply,
The gate pole of described two MOSFET accepts pwm pulse control signal, and during a MOSFET on-state, the 2nd MOSFET turns off, and inverter normally runs, and driving electric machine works; When needs are braked, during a MOSFET off-state, the 2nd MOSFET adopts certain duty ratio PWM to carry out copped wave, during conducting, set up electric current by the first resistance, the former limit of high frequency transformer, high frequency transformer stores magnetic energy, first resistance power consumption realizes fast braking, and duty ratio is larger, brakes faster; When 2nd MOSFET turns off, high frequency transformer secondary induced voltage is the second electrochemical capacitor charging by the 3rd diode, and simultaneously for DC radiation fan is powered, DC radiation fan runs and power consumption, is heater element heat radiation; 3rd resistance is dummy resistance, and voltage stabilizing didoe plays pressure limiting effect, prevents DC radiation fan overvoltage from burning; Second resistance, the first ac capacitor and the second diode play and limit the too high clamping action of high frequency transformer former limit induced voltage and magnetic circuit reset response.
2. a kind of motor brake device according to claim 1, is characterized in that, the capacitance of described first ac capacitor is 2 μ F, withstand voltage is 600V, and the capacitance of the first electrochemical capacitor is 680 μ F, and withstand voltage is 400V, the capacitance of the second electrochemical capacitor is 470 μ F, and withstand voltage is 100V.
3. a kind of motor brake device according to claim 2, is characterized in that, the resistance value of described first resistance is 33 Ω, and power is 10W; The resistance value of the second resistance is 15 Ω, and power is 2W; The resistance value of the 3rd resistance is 10k Ω, and power is 1.0W.
4. a kind of motor brake device according to claim 3, is characterized in that, the parameter of described two MOSFET is resistance to stream 25A/100 DEG C, and withstand voltage is 500V.
5. a kind of motor brake device according to claim 3, is characterized in that, the model of described three diodes is 1N4148.
6. a kind of motor brake device according to claim 3, is characterized in that, described high frequency transformer no-load voltage ratio is 100:10, and power is 20W.
7. a kind of motor brake device according to claim 3, is characterized in that, described voltage stabilizing didoe is voltage stabilizing 24V, and power is 2W.
8. a kind of motor brake device according to claim 1, 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 |
|---|---|---|---|
| CN201310090982.3A CN103199770B (en) | 2013-03-20 | 2013-03-20 | Electromotor braking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310090982.3A CN103199770B (en) | 2013-03-20 | 2013-03-20 | Electromotor braking device |
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| CN103199770A CN103199770A (en) | 2013-07-10 |
| CN103199770B true CN103199770B (en) | 2015-05-20 |
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| CN201310090982.3A Expired - Fee Related CN103199770B (en) | 2013-03-20 | 2013-03-20 | Electromotor braking device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109067291B (en) * | 2018-07-26 | 2024-02-02 | 苏州力生美半导体有限公司 | Stepless speed regulation control and energy clamping circuit of alternating current motor and device thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60118092A (en) * | 1983-11-30 | 1985-06-25 | Toshiba Corp | Speed controller of motor |
| JPH0352575A (en) * | 1989-07-19 | 1991-03-06 | Mitsubishi Electric Corp | Cooling device utilizing regenerated energy |
| CN202121543U (en) * | 2011-06-13 | 2012-01-18 | 苏州能健电气有限公司 | AC motor driving device with vector control used in variable-pitch control system |
| CN203166810U (en) * | 2013-03-20 | 2013-08-28 | 上海交通大学 | Rapid energy-consumption braking circuit employing heat radiation fan |
-
2013
- 2013-03-20 CN CN201310090982.3A patent/CN103199770B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60118092A (en) * | 1983-11-30 | 1985-06-25 | Toshiba Corp | Speed controller of motor |
| JPH0352575A (en) * | 1989-07-19 | 1991-03-06 | Mitsubishi Electric Corp | Cooling device utilizing regenerated energy |
| CN202121543U (en) * | 2011-06-13 | 2012-01-18 | 苏州能健电气有限公司 | AC motor driving device with vector control used in variable-pitch control system |
| CN203166810U (en) * | 2013-03-20 | 2013-08-28 | 上海交通大学 | Rapid energy-consumption braking circuit employing heat radiation fan |
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