CN106374784B - Compare the circuit and control method for realizing dynamic braking by voltage - Google Patents
Compare the circuit and control method for realizing dynamic braking by voltage Download PDFInfo
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- CN106374784B CN106374784B CN201610798692.8A CN201610798692A CN106374784B CN 106374784 B CN106374784 B CN 106374784B CN 201610798692 A CN201610798692 A CN 201610798692A CN 106374784 B CN106374784 B CN 106374784B
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- voltage
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- dynamic braking
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
- H02P3/12—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor by short-circuit or resistive braking
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a kind of circuits and control method for comparing realization dynamic braking by voltage.Energy-dissipating brake circuit is made of voltage comparison loop, power amplification circuit, voltage-stabilizing protection circuit and status display circuit.Voltage comparison loop realizes input voltage compared with output voltage by connecting terminal JP1, triode Q1, resistance R3, diode D1 and diode D2；Power amplification returns routing resistance R6 and field-effect tube Q2 and realizes power amplification, realizes energy consumption by energy consumption resistance R1；Voltage-stabilizing protection returns routing resistance R4 and diode D3 and realizes voltage-stabilizing protection；Status display returns routing resistance R2 and light emitting diode DS1 and realizes power supply instruction, state instruction when realizing dynamic braking by resistance R5 and light emitting diode DS2.Compared using circuit of the present invention by voltage and automatically switch normal power supply mode or dynamic braking mode, is applicable to the motor of free voltage grade.
Description
Technical field
The invention belongs to field of electrical control, it is specifically a kind of by voltage compare realize dynamic braking circuit and
Control method.
Background technique
Direct current generator mainly realizes braking by modes such as reversing braking, series resistors at present, and when braking need to judge motor
Whether it is in on-position, while needing switching circuit, control is complicated, and reliability is low, existing to compare realization energy consumption by voltage
Braking is compared with a certain particular voltage level, and different electric moter voltage grades or different power of motor braking circuits then can not
It is general.
Summary of the invention
The purpose of the present invention is to provide a kind of circuits and control method for comparing realization dynamic braking by voltage.
The technical solution for realizing the aim of the invention is as follows: a kind of to compare the circuit for realizing dynamic braking, packet by voltage
Include voltage comparison loop, power amplification circuit, voltage-stabilizing protection circuit and status display circuit；
Voltage comparison loop is by connecting terminal JP1, triode Q1, first resistor R3, first diode D1 and the two or two pole
Pipe D2 realizes input voltage compared with output voltage；
Power amplification is realized by the 5th resistance R6 and field-effect tube Q2 in power amplification circuit, realizes energy by energy consumption resistance R1
Consumption；
Voltage-stabilizing protection circuit voltage-stabilizing protection is realized by second resistance R4 and third diode D3；
Power supply instruction is realized by 3rd resistor R2 and the first light emitting diode DS1 in status display circuit, by the 4th resistance R5
State instruction when realizing dynamic braking with the second light emitting diode DS2.
It is a kind of to compare the control method for realizing the circuit of dynamic braking by voltage, it is defeated when motor work is in normal mode
When entering voltage Vin higher than output voltage Vout, first diode D1 conducting, input voltage vin is by first diode D1 by defeated
Voltage Vout is motor power supply out, and the first light emitting diode DS1 is bright at this time, indicates power work；
When motor is in generating state, armature voltage because counter electromotive force cause output voltage Vout increase, when
When output voltage Vout is higher than input voltage vin, first diode D1 cut-off, while electric current passes through PNP triode Q1, current limliting electricity
R3, the second diode D2, triode Q1 conducting are hindered, electric current makes field-effect via the 5th resistance R6 driving power field-effect tube Q2
Pipe Q2 conducting, while the second light emitting diode DS2 is bright, indicates circuit work at this time in dynamic braking state, to prevent driving field
Effect tube voltage is excessively high, realizes overvoltage protection using second resistance R4 and voltage-stabiliser tube D3；When field-effect tube Q2 is connected, energy consumption resistance
R1 loop works, achieve the purpose that dynamic braking；
When motor returns to normal mode of operation by braking mode, first diode D1 is connected again, triode Q1 and field
Effect pipe Q2 cut-off, it is motor power supply that input voltage vin, which continues through first diode D1 by output voltage Vout, and circuit is realized
No-harass switch.
Compared with prior art, the present invention its remarkable advantage: if motor work is frequently driving the occasion with braking, or
It is that can not judge that motor work at this time in which kind of state, is compared by voltage using circuit of the present invention and automatically switches normal power supply mould
Formula or dynamic braking mode；Using input voltage compared with output voltage, such manner of comparison is applicable to voltage manner of comparison
The motor of free voltage grade；Energy consumption resistance power can arbitrarily be matched according to brake force size, to reach corresponding braking effect,
Can also external energy storage device, realize energy feedback；Furthermore the circuit is installed at motor power supply side, without changing control loop,
Even if not considering motor braking control at the beginning of design, it can also facilitate and be installed additional in the later period, application is very flexible.
Detailed description of the invention
Fig. 1 is whole schematic diagram of the invention.
Fig. 2 is circuit diagram of the invention.
Specific embodiment
The present invention realizes direct current generator dynamic braking by comparing input and output voltage, which judges automatically current motor
It whether is in on-position, power circuitry is automatically switched under on-position and realizes energy consumption of electrical machinery braking, when motor operates normally
When, circuit switches back to powering mode automatically.Different capacity energy consumption resistance can be selected according to the size of brake force, and adapt to different electricity
Press the power reguirements of grade motor.
The present invention is described in further detail below in conjunction with the accompanying drawings.
It is a kind of to compare the circuit for realizing dynamic braking by voltage in conjunction with Fig. 1,2, by voltage comparison loop, power amplification
Circuit, voltage-stabilizing protection circuit and status display circuit are constituted.
Voltage comparison loop is by connecting terminal JP1, triode Q1, first resistor R3, first diode D1 and the two or two pole
Pipe D2 realizes input voltage compared with output voltage；
Power amplification is realized by the 5th resistance R6 and field-effect tube Q2 in power amplification circuit, realizes energy by energy consumption resistance R1
Consumption；
Voltage-stabilizing protection circuit voltage-stabilizing protection is realized by second resistance R4 and third diode D3；
Power supply instruction is realized by 3rd resistor R2 and the first light emitting diode DS1 in status display circuit, by the 4th resistance R5
State instruction when realizing dynamic braking with the second light emitting diode DS2.
In the voltage comparison loop, first diode D1 is connect with connecting terminal Vin and Vout, the second diode D2 with
Vin is connected with first resistor R3, and first resistor R3 is connect with the second diode D2 and triode Q1, triode Q1 and Vout, the
Five resistance R6, first resistor R3 connection.
In the power amplification circuit, the 5th resistance R6 is connect with triode Q1 and field-effect tube Q2, field-effect tube Q2 with
5th resistance R6, energy consumption resistance R1 are connected with power ground, and energy consumption resistance R1 is connect with connecting terminal RAD1 and RAD2.
In the voltage-stabilizing protection circuit, second resistance R4 is connect with field-effect tube Q2 and power ground, third diode D3 with
Field-effect tube Q2 is connected with power ground.
In the status display circuit, 3rd resistor R2 is connect with Vin and light emitting diode DS1, the first light emitting diode
DS1 is connect with 3rd resistor R2 and power ground, and the 4th resistance R5 is connect with the second light emitting diode DS2 and power ground, the second hair
Optical diode DS2 hinders R5 and field-effect tube Q2 with electricity the 4th and connect.
The concrete operating principle of this circuit is when motor work is in normal mode, and input voltage vin is higher than output voltage
When Vout, first diode D1 conducting, input voltage vin is motor power supply by output voltage Vout by first diode D1,
The first light emitting diode DS1 is bright at this time, indicates power work；
When motor is in generating state, armature voltage because counter electromotive force cause output voltage Vout increase, when
When output voltage Vout is higher than input voltage vin, first diode D1 cut-off, while electric current passes through PNP triode Q1, current limliting electricity
R3, the second diode D2, triode Q1 conducting are hindered, electric current makes field-effect via the 5th resistance R6 driving power field-effect tube Q2
Pipe Q2 conducting, while the second light emitting diode DS2 is bright, indicates circuit work at this time in dynamic braking state, to prevent driving field
Effect tube voltage is excessively high, realizes overvoltage protection using second resistance R4 and voltage-stabiliser tube D3；When field-effect tube Q2 is connected, energy consumption resistance
R1 loop works, achieve the purpose that dynamic braking；
When motor returns to normal mode of operation by braking mode, first diode D1 is connected again, triode Q1 and field
Effect pipe Q2 cut-off, it is motor power supply that input voltage vin, which continues through first diode D1 by output voltage Vout, and circuit is realized
No-harass switch.
Claims (6)
1. a kind of compare the circuit for realizing dynamic braking by voltage, it is characterised in that: including voltage comparison loop, power amplification
Circuit, voltage-stabilizing protection circuit and status display circuit；
Voltage comparison loop is by connecting terminal JP1, triode Q1, first resistor R3, first diode D1 and the second diode D2
Realize input voltage compared with output voltage；
Power amplification is realized by the 5th resistance R6 and field-effect tube Q2 in power amplification circuit, realizes that energy disappears by energy consumption resistance R1
Consumption；
Voltage-stabilizing protection circuit voltage-stabilizing protection is realized by second resistance R4 and voltage-stabiliser tube D3；
Power supply instruction is realized by 3rd resistor R2 and the first light emitting diode DS1 in status display circuit, by the 4th resistance R5 and the
State instruction when two light emitting diode DS2 realize dynamic braking.
2. according to claim 1 compare the circuit for realizing dynamic braking by voltage, it is characterised in that: the voltage ratio
Compared in circuit, the input port Vin of first diode D1 and connecting terminal JP1, the output port Vout of connecting terminal JP1 connect
It connecing, the second diode D2 is connect with Vin and first resistor R3, and first resistor R3 is connect with the second diode D2 and triode Q1,
Triode Q1 is connect with Vout, the 5th resistance R6, first resistor R3.
3. according to claim 1 compare the circuit for realizing dynamic braking by voltage, it is characterised in that: the power is put
In big circuit, the 5th resistance R6 is connect with triode Q1 and field-effect tube Q2, field-effect tube Q2 and the 5th resistance R6, energy consumption resistance
R1 is connected with power ground, and energy consumption resistance R1 is connect with the port RAD2 of the port RAD1 of connecting terminal JP1, connecting terminal JP1.
4. according to claim 1 compare the circuit for realizing dynamic braking by voltage, it is characterised in that: the pressure stabilizing is protected
It protects in circuit, second resistance R4 is connect with field-effect tube Q2 and power ground, and voltage-stabiliser tube D3 is connect with field-effect tube Q2 and power ground.
5. according to claim 1 compare the circuit for realizing dynamic braking by voltage, it is characterised in that: the state is aobvious
Show in circuit, 3rd resistor R2 is connect with the input port Vin of connecting terminal JP1 and the first light emitting diode DS1, and first shines
Diode DS1 is connect with 3rd resistor R2 and power ground, and the 4th resistance R5 is connect with the second light emitting diode DS2 and power ground,
Second light emitting diode DS2 is connect with the 4th resistance R5 and field-effect tube Q2.
6. a kind of control method of the circuit as described in claim 1 for comparing realization dynamic braking by voltage, feature exist
In: when motor work is in normal mode, when input voltage vin is higher than output voltage Vout, first diode D1 conducting, input electricity
Pressing Vin to pass through first diode D1 by output voltage Vout is motor power supply, and the first light emitting diode DS1 is bright at this time, indicates electricity
Source work；
When motor is in generating state, armature voltage works as output because counter electromotive force causes output voltage Vout to increase
When voltage Vout is higher than input voltage vin, first diode D1 cut-off, while electric current passes through PNP triode Q1, first resistor
R3, the second diode D2, PNP triode Q1 conducting, electric current make field-effect tube Q2 via the 5th resistance R6 driving FET Q2
Conducting, while the second light emitting diode DS2 is bright, indicates circuit work at this time in dynamic braking state, to prevent driving field-effect
Tube voltage is excessively high, realizes overvoltage protection using second resistance R4 and voltage-stabiliser tube D3；When field-effect tube Q2 is connected, energy consumption resistance R1 is returned
Road work, achievees the purpose that dynamic braking；
When motor returns to normal mode of operation by braking mode, first diode D1 is connected again, PNP triode Q1 and field effect
Should pipe Q2 cut-off, input voltage vin continue through first diode D1 by output voltage Vout be motor power, circuit realization nothing
Disturb switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610798692.8A CN106374784B (en) | 2016-08-31 | 2016-08-31 | Compare the circuit and control method for realizing dynamic braking by voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610798692.8A CN106374784B (en) | 2016-08-31 | 2016-08-31 | Compare the circuit and control method for realizing dynamic braking by voltage |
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| Publication Number | Publication Date |
|---|---|
| CN106374784A CN106374784A (en) | 2017-02-01 |
| CN106374784B true CN106374784B (en) | 2019-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610798692.8A Active CN106374784B (en) | 2016-08-31 | 2016-08-31 | Compare the circuit and control method for realizing dynamic braking by voltage |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5294874A (en) * | 1992-08-13 | 1994-03-15 | Milwaukee Electric Tool Corporation | Dynamic brake circuit for an electric motor |
| CN101058296A (en) * | 2006-04-30 | 2007-10-24 | 湘潭市恒信电气有限公司 | Input judgement method and device for regeneration braking absorbing instrument |
| CN103199770A (en) * | 2013-03-20 | 2013-07-10 | 上海交通大学 | Electromotor braking device |
| CN103618483A (en) * | 2013-11-28 | 2014-03-05 | 丽水职业技术学院 | Sectional-type energy consumption brake circuit of permanent-magnet direct current motor |
| CN104935215A (en) * | 2015-06-05 | 2015-09-23 | 柳州弘天科技有限公司 | Braking unit |
-
2016
- 2016-08-31 CN CN201610798692.8A patent/CN106374784B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5294874A (en) * | 1992-08-13 | 1994-03-15 | Milwaukee Electric Tool Corporation | Dynamic brake circuit for an electric motor |
| CN101058296A (en) * | 2006-04-30 | 2007-10-24 | 湘潭市恒信电气有限公司 | Input judgement method and device for regeneration braking absorbing instrument |
| CN103199770A (en) * | 2013-03-20 | 2013-07-10 | 上海交通大学 | Electromotor braking device |
| CN103618483A (en) * | 2013-11-28 | 2014-03-05 | 丽水职业技术学院 | Sectional-type energy consumption brake circuit of permanent-magnet direct current motor |
| CN104935215A (en) * | 2015-06-05 | 2015-09-23 | 柳州弘天科技有限公司 | Braking unit |
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| Publication number | Publication date |
|---|---|
| CN106374784A (en) | 2017-02-01 |
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