CN103618483A - Sectional-type energy consumption brake circuit of permanent-magnet direct current motor - Google Patents
Sectional-type energy consumption brake circuit of permanent-magnet direct current motor Download PDFInfo
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- CN103618483A CN103618483A CN201310659267.7A CN201310659267A CN103618483A CN 103618483 A CN103618483 A CN 103618483A CN 201310659267 A CN201310659267 A CN 201310659267A CN 103618483 A CN103618483 A CN 103618483A
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Abstract
The invention provides a permanent-magnet direct current motor brake device completely achieving brake through electrical actions and having the advantages of being large in braking torque, high in brake speed, good in effect, fast in reaction, good in reliability and high in safety factor. The device is composed of a voltage detection module, i energy consumption braking modules and a zero-voltage braking module. When a zero voltage or under voltage is detected by an input detection module, the first energy consumption braking module works, a power transistor is saturated and switched on, an energy consumption resistor is connected to the two ends of the motor, inertia mechanical energy of a rotor is converted to electric energy, the electric energy is transmitted to the energy consumption resistor to be consumed through heating, and accordingly the motor can operate under braking. Voltage continuously decreases as the braking time of the motor increases. The first module is not in a saturation state any more because the voltage is too low, a high level is output by a control terminal, the next-level energy consumption braking module starts to work, and the first energy consumption braking process is repeated until the last module works.
Description
Technical field
The present invention relates to a kind of electronic circuit that permanent magnet direct current motor braking is controlled that is applied to, be particularly applied to the energy-dissipating brake circuit of permanent magnet direct current motor.
Background technology
In a lot of workplaces, motor need to be shut down rapidly and accurately, and this just need to implement brake measure to the motor running up.The brake tool of motor common are mechanical braking, electric braking etc., has again the various ways such as plug braking, dynamic braking, regenerative feedback braking in electric braking.Wherein mechanical braking mode exists cost high, and volume is large, and the maintenance workload large deficiency that waits, particularly heating are seriously not suitable for frequent braking and braking for a long time; Electric plug braking process electric current is too large, and end of braking is difficult to control the phenomenons such as easy generation reversion; Regenerative feedback braking equipment is complicated, high in cost of production shortcoming is only applicable to for a long time braking continuously, as the long-time continuous that electric locomotive must be taked from plateau descending is braked.
Its principle of permanent magnet direct current motor dynamic braking is when motor needs fast braking to stop, oneself stops power supply armature, but still there is work magnetic field in motor permanent magnetism magnetic pole in motor, thereby rotor relies on inertia to continue rotary wire in this magnetic field and makes cutting magnetic line movement generation rotor electromotive force, and now motor is actually the generator state that operates in.When armature coil circuit closed, this rotor electromotive force forms ring current and acts on mutually formation brake torque with fixed magnetic field in coil, the kinetic energy rapid conversion of rotor is that heat energy distributes the inertia energy that exhausts rotor simultaneously, thereby rotor is stopped fast, realizes braking.
The disadvantage of dynamic braking is to brake initial time because rotor speed is high, and the electromotive force of generation is also higher, and braking moment is larger; Along with the decline of motor speed, the speed of armature coil cutting magnetic field also declines, and induced electromotive force declines thereupon, and braking moment also synchronously declines; Therefore dynamic braking is along with the increase of braking time, and braking moment can present continuous downward trend, finally need to rely on mechanical braking to realize complete braking and locking fast.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of and by electric effect, produce braking moment completely, have that braking moment is large, retro-speed is fast, effective, reflection rapidly, good reliability, permanent magnet direct current motor brake apparatus that coefficient of safety is high.
The technical scheme that the present invention will solve its technical problem employing is: by the mode to the additional dynamic braking module of motor port, realize pure electric dynamic braking.It is comprised of input voltage detection module, an i dynamic braking module and a zero-pressure brake module; Essential characteristic is that first the DC power supply of supplying with motor is transported to voltage detection module, a diode D of voltage detection module power output end series connection
owith i dynamic braking module k below
ipower end is in series, and is finally connected in series a zero-pressure brake module k again
e, zero-pressure brake module the most at last direct current is transported to permanent magnet direct current motor; k
ithe action keyed end of the dynamic braking module of section is by a diode D
ik after connecting
i+1the action keyed end of brake module; The action keyed end of voltage detection module is by diode D
sibe connected with the action keyed end of each module, pass through D
sebe connected with zero-pressure brake module action keyed end.Brake module can be any i, and i such as is greater than at 1 the natural number.
Advantage of the present invention and obtainable usefulness are based on dynamic braking principle, adopt modularization segmentation to control stalling current, at whole braking procedure, braking moment is remained unchanged substantially and braking moment is large, retro-speed is fast, effective, safe and reliable cost is low, the feature of long service life, can be applied to the permanent magnet direct current motor of all size model.
Accompanying drawing explanation
Fig. 1 structural representation of the present invention;
Fig. 2 input voltage detection module circuit theory diagrams;
Fig. 3 section of dynamic braking modular circuit schematic diagram;
Fig. 4 no-voltage brake module circuit theory diagrams;
Discrete component of Fig. 5 forms has the two sections of fast segmented energy-dissipating brake circuit of dynamic braking mould special cases.
Embodiment
Consult accompanying drawing 1, first power supply is transported to voltage detection module, by detection module, detects power supply energising and power-off two states.When power supply "on" position, a low level signal of control end output is locked by all brake modules below, and power supply is by diode D
0be connected with tandem brake modular power source end below finally to motor power supply, now all brake modules are all failure to actuate, and motor is in normal operating conditions.
When power remove or lower voltage stop voltage to motor, input detection module detects no-voltage or under-voltage state confirm as motor and need to stop after, input module control end transfers high level to, has cancelled the locking of circuit below, and brake module is started working.
The first dynamic braking module starts action, inner power transistor saturation conduction, motor two ends connect into an energy consumption resistance, now motor is in generating state, armature is converted into electric energy by rotor inertia mechanical energy and delivers to the form consumption to generate heat on energy consumption resistance, and motor is realized running under braking.Along with the increase of motor brake time, the energy of motor consumes gradually, and rotating speed constantly reduces, and the voltage at armature two ends also constantly reduces; Voltage is low after first paragraph setting voltage, the first module exits saturation condition because of brownout, the high level of control end output simultaneously, rear one-level dynamic braking module starts action, inner power transistor saturation conduction, repeat the first dynamic braking process, by that analogy until last module.Thereby because the stalling current of each module can be by regulating energy consumption resistance to guarantee that although the voltage of each retaining segment is different, the effect that stalling current is the same.
When having arrived armature voltage and being close to zero, because armature two ends output voltage is too low, therefore last zero-pressure brake module with regard to direct short-circuit, produces large as far as possible stalling current to realize the braking the soonest of motor; Inside due to zero-pressure brake module has energy storage capacitor simultaneously, can guarantee the time that circuit working stops to enough motors, has guaranteed the steady of whole braking procedure.
Fig. 2 is the circuit theory diagrams that input voltage detection module inside consists of discrete component.R1, D1 form voltage stabilizing circuit provides a stable bias voltage to transistor, and R2 is base biasing resistor for transistor Q1 provides bias current, and R3 is collector load resistor.When motor is in when normal operation, Q1 saturation conduction, low level of collector output is as the control signal of module below.
Fig. 3 is the dynamic braking inside modules circuit theory diagrams that discrete component forms.R4, R5 form adjustable bias pressure road provides biasing for power tube Q2, the voltage ratio difference of R4, R5 has also formed the difference that enters saturation voltage threshold values of power tube simultaneously, this voltage is exactly the segmentation voltage of dynamic braking, and different values has determined the starting voltage of this module braking.Q2 saturation conduction when module is worked, R6 is connected in parallel on motor armature two ends and serves as energy consumption resistance.C1, D4 are protection component, and C1 anti-interference filtration, D4 are voltage stabilizing didoe, and the grid of protection metal-oxide-semiconductor is not by over-voltage breakdown.
Fig. 4 is the no-voltage brake module internal circuit schematic diagram that discrete component forms.R9, R10, C3, D11, Q4 are identical with the function of dynamic braking module above, but no-voltage module does not have energy consumption resistance, armature two ends are by power tube direct short-circuit, and energy consumption is on power tube, and can guarantee like this has enough stalling currents to shorten braking time under low voltage condition; When motor works, supply voltage charges to C4 by D10, when no-voltage brake module is worked due to armature voltage oneself close to zero, C4 starts to maintain by R9, R10 electric discharge the normal bias voltage of Q4, guarantees the normal operation of inside brake circuit for some time after power-off.
Fig. 5 is two sections of energy-dissipating brake circuit special cases that are comprised of discrete component.The elements such as the R1 of Q1 and periphery, R3, D1 form input voltage inspection module; Q2 and R4, R5, R6, C1, D4 form first paragraph brake module; Q3 and R7, R8, R9, C2, D7 etc. around element form second segment dynamic braking module; Q4, R10, R11, C3, C4, D11, D12 form no-voltage brake module.
The effect of D2 is to separate the charge voltage that input voltage and armature back-emf and filter capacitor are stored, the voltage correctness that assurance detects, and D3～D10 is the locking diode between each section, guarantees to brake the accuracy of segmentation.
Claims (2)
1. a permanent magnet direct current motor segmented energy-dissipating brake circuit, it is comprised of input voltage detection module, an i dynamic braking module and a zero-pressure brake module; Essential characteristic is that first the DC power supply of supplying with motor is transported to voltage detection module, diode Do of voltage detection module power output end series connection is in series with i dynamic braking module ki power end below, finally be connected in series a zero-pressure brake module ke, zero-pressure brake module the most at last direct current is transported to permanent magnet direct current motor again; The action keyed end of ki+1 brake module after the action keyed end of the dynamic braking module of ki section connects by a diode Di; The action keyed end of voltage detection module is connected with the action keyed end of each module by diode Dsi, by Dse, is connected with zero-pressure brake module action keyed end.
2. by a kind of permanent magnet direct current motor segmented energy-dissipating brake circuit claimed in claim 1, its essential characteristic is that brake module can be any i, and i such as is greater than at 1 the natural number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310659267.7A CN103618483A (en) | 2013-11-28 | 2013-11-28 | Sectional-type energy consumption brake circuit of permanent-magnet direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310659267.7A CN103618483A (en) | 2013-11-28 | 2013-11-28 | Sectional-type energy consumption brake circuit of permanent-magnet direct current motor |
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| Publication Number | Publication Date |
|---|---|
| CN103618483A true CN103618483A (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310659267.7A Pending CN103618483A (en) | 2013-11-28 | 2013-11-28 | Sectional-type energy consumption brake circuit of permanent-magnet direct current motor |
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| CN (1) | CN103618483A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656370A (en) * | 2016-03-09 | 2016-06-08 | 广东美的制冷设备有限公司 | Air conditioner and shutdown control method and device for compressor of air conditioner |
| CN105958871A (en) * | 2016-03-09 | 2016-09-21 | 广东美的制冷设备有限公司 | Air conditioner and compressor thereof shutdown control method and device |
| 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 |
| CN106549362A (en) * | 2016-10-31 | 2017-03-29 | 青岛海尔科技有限公司 | A kind of motor and motor protection method |
| CN108574427A (en) * | 2017-03-10 | 2018-09-25 | 西门子公司 | Transducer brake unit and frequency converter |
| CN109814479A (en) * | 2019-01-15 | 2019-05-28 | 重庆艾博瑞威轨道交通设备有限公司 | Tourist train control system |
-
2013
- 2013-11-28 CN CN201310659267.7A patent/CN103618483A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656370A (en) * | 2016-03-09 | 2016-06-08 | 广东美的制冷设备有限公司 | Air conditioner and shutdown control method and device for compressor of air conditioner |
| CN105958871A (en) * | 2016-03-09 | 2016-09-21 | 广东美的制冷设备有限公司 | Air conditioner and compressor thereof shutdown control method and device |
| US10411618B2 (en) | 2016-03-09 | 2019-09-10 | Gd Midea Air-Conditioning Equipment Co., Ltd. | Air conditioner, and method and device for controlling its compressor to stop |
| 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 |
| CN106549362A (en) * | 2016-10-31 | 2017-03-29 | 青岛海尔科技有限公司 | A kind of motor and motor protection method |
| CN108574427A (en) * | 2017-03-10 | 2018-09-25 | 西门子公司 | Transducer brake unit and frequency converter |
| CN108574427B (en) * | 2017-03-10 | 2022-06-28 | 西门子公司 | Frequency converter brake unit and frequency converter |
| CN109814479A (en) * | 2019-01-15 | 2019-05-28 | 重庆艾博瑞威轨道交通设备有限公司 | Tourist train control system |
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Application publication date: 20140305 |